KAH2402201NA07 - Matsuo Electric Co., Ltd.

Type KAH micro fuse is designed for circuit protection against excessive current in portable electronic equipment, electronic circuit

around battery, etc. because the demand for high capacity batteries is increasing.

Further miniaturization and low profile with extended rated range can be used for wider application.

Also, the ecology design of Type KAH is friendly to environment due to complete lead free.

1. 5-face terminals structure ensure superior performance of shear strength (10 N for 5-face terminals, 5 N for conventional type).

2. With new development of micro fuse using our original production method, Type KAH, size 1005 can ensure same fusing

characteristics of size 1608 of our Type KAB.

3. Complete lead-free Type KAH is designed to eco-friendly.

4. UL file number E170721. (UL248-1 & 14)

5. Surface temperature rise is 75°C or less when applying rated current. This offers less influence on the peripheral units.

6. 1005 is the Ultra-small size. (1.0 x 0.5 x 0.35 mm)

7. Suitable for automatic mounting

8. Precise dimensions allows high-density mounting and symmetrical construction of terminals provide “Self-Alignment”.

9. Resistance to soldering heat : Reflow or flow soldering 10 seconds at 260°C

10. High accuracy carrier tape by using pressed pocket paper ensures excellent mounting.

Item Ratings

Category Temperature Range – 40~+125°C

Rated Current 0.2–0.25–0.315–0.4–0.5–0.63–0.8–1.0–1.25–1.6–2.0–2.5A

Rated Voltage 24 VDC

Voltage Drop Refer to CATALOG NUMBERS AND RATING

Insulation Resistance 1000 MΩ or more

Fusing Characteristics Fusing within 1 minute if the current is 200% of rated current.

Clearing Characteristics Breaking voltage : 24 V

Breaking current : 50 A

KAH 2402 102 NA 07

Type

Code

Rated current

Code

Rated current

Code

Packaging type

Code

Case size

KAH

2402

24V

201

251

321

401

501

631

0.2 A

0.25 A

0.315 A

0.4 A

0.5 A

0.63 A

801

102

132

162

202

252

0.8 A

1.0 A

1.25 A

1.6 A

2.0 A

2.5 A

180 Reel

1.0×0.5

Catalog number Case size Rated current

Internal resistance

mΩ

(Typical)

Voltage drop

(Max.)

Rated

voltage

VDC

Breaking

current

KAH 2402 201□□07

1.0 × 0.5

0.2 1148 350

24 50

KAH 2402 251□□07

1.0 × 0.5

0.25 797 300

KAH 2402 321□□07

1.0 × 0.5

0.315 548 260

KAH 2402 401□□07

1.0 × 0.5

0.4 372 225

KAH 2402 501□□07

1.0 × 0.5

0.5 261 195

KAH 2402 631□□07

1.0 × 0.5

0.63 181 170

KAH 2402 801□□07

1.0 × 0.5

0.8 125 150

KAH 2402 102□□07

1.0 × 0.5

1.0 90 135

KAH 2402 132□□07

1.0 × 0.5

1.25 65 120

KAH 2402 162□□07

1.0 × 0.5

1.6 46 110

KAH 2402 202□□07

1.0 × 0.5

2.0 35 110

KAH 2402 252□□07

1.0 × 0.5

2.5 27 110

For the taping type, the packaging code “NA” will be entered in □□

Catalog numbers are approved by UL and cUL. (File No. E170721)

FEATURES

CATALOG NUMBERS AND RATING

January, 2013

RATING

ORDERING INFORMATION

TYPE

KAH

(No. P

E00

)

MARKING

CONSTRUCTION

Main body：Alumina ceramic

Terminal：Tin plating (mm)

Case size Case code L W T max P

1005 07 1.00±0.05 0.50±0.05 0.35 0.20±0.10

Code ： Rated current Code ： Rated current

P ： 0.20 A V ： 0.80 A

Q ： 0.25 A 1 ： 1.00 A

R ： 0.315 A W ： 1.25 A

S ： 0.40 A X ： 1.60 A

T ： 0.50 A 2 ： 2.00 A

U ： 0.63 A Y ： 2.50 A

Name Mate

Protective coating Silicone resin

Fuse element Copper alloy

Body Alumina ceramic

Terminal Tin painting

(mm)

Size 1005

a 0.4

b 0.5

c 0.6

Glass epoxy on one side

Board thickness：1.6 mm

Copper layer：35mm

DIMENSIONS

STANDARD TEST BOARD

RECOMMENDED PAD DIMENSIONS

Ｐ

Ｌ

Ｗ

Ｔ

Body

Fuse element Protective

coating Terminal

100 mm

33 mm

5 mm

0.6 mm

No.

Item Performance Test method

1 Temperature rise Temperature rise shall not exceed 75℃. Apply rated current.

2 Current-carrying

capacity Shall not open within 1 hour. Apply rated current.

3 Clearing characteristics

Arc shall not be continued.

Marking shall be legible. Breaking voltage：24 V

Breaking current：50 A

4 Voltage drop Voltage drop is below the value specified in CATALOG

NUMBERS AND RATING. Apply rated current.

5 Fusing characteristics Fusing within 1 min. Apply 200% of rated current.

(Ambient temperature：10–30°C

6 Insulation resistance 1000 MΩ or more Insulation resistance between terminals and case

(alumina ceramic)

7 Electrode strength

(Bending) No mechanical damage.

Resistance change after the test shall be within ± 20%.

Board supporting width：90 mm

Bending speed：Approx. 0.5 mm/sec.

Duration：30 sec.

Bending：3 mm

8 Shear test No mechanical damage.

Resistance change after the test shall be within ± 20%.

Applied force：10 N (1.02 kgf)

Duration：10 sec.

Tool：R0.5

Direction of the press：side face

9 Substrate bending test No mechanical damage.

Resistance change after the test shall be within ± 20%.

Supporting dimension：0.5 mm

Applied force：5 N (0.51 kgf)

Tool：R0.5

Direction of the press：thickness direction of product.

Solderability

(Solder Wetting time) Solder Wetting time : within 3sec.

Solder : Sn–3Ag–0.5Cu

Temperature : 245 ± 3°C

meniscograph method

Solder : JISZ3282 H60A, H60S, H63A

Temperature : 230 ± 2°C

meniscograph method

Solderability

(new uniform coating of

solder)

The dipped surface of the terminals shall be covered

more than 95% with new solder.

Solder : Sn–3Ag–0.5Cu

Temperature : 245 ± 3°C

Dipping : 3 sec.

Solder : JISZ3282 H60A, H60S, H63A

Temperature : 230 ± 2°C

Dipping : 3 sec.

Resistance to soldering

heat

Marking shall be legible.

No mechanical damage.

Resistance change after the test shall be within ± 20%.

Dipping (1 cycle)

Preconditioning：100 to 150°C, 60 sec.

Temperature：265 ± 3°C /6–7 sec.

Reflow soldering (2 cycles)

Preconditioning：1–2 min, 180°C or less

Peak：250 ± 5°C, 5 sec.

Holding：230–250°C, 30–40 sec.

Cooling：more than 2 min.

Manual soldering

Temperature：350 ± 10°C

Duration：3–4 sec.

Measure after 1 hour left under room temp. and humidity.

Solvent resistance Marking shall be legible.

No mechanical damage.

Resistance change after the test shall be within ± 20%.

Dipping rinse

Solvent：Isopropyl alcohol

Duration：90 sec.

Ultrasonic Cleaning Marking shall be legible.

No mechanical damage.

Resistance change after the test shall be within ± 20%.

Ultrasonic : 20mW/cm

28kHz

Solvent：Isopropyl alcohol

Duration：60 sec.

Vibration No mechanical damage.

Resistance change after the test shall be within ± 20%.

Frequency range：10–55–10 Hz/min

Vibration amplitude：1.5 mm

Duration：2 hours in each of XYZ directions

(total：6 hours)

Shock No mechanical damage.

Resistance change after the test shall be within ± 20%.

Peak value：490 m/s

(50 G)

Duration：11 m sec.

6 aspects

3 times (total：18 times)

Thermal shock No mechanical damage.

Resistance change after the test shall be within ± 20%.

–55 ± 3°C : 30 min.

Room temperature：2–3 min or less 125 ± 2°C 30 min

Room temperature：2–3 min or less Repeat above step for

10 cycles.

Atomizing salt water No mechanical damage.

Resistance change after the test shall be within ± 20%.

Temperature : 35 ± 2°C

Concentration (weight ratio) : 5 ± 1%

Duration : 24 hours

Moisture resistance No mechanical damage.

Resistance change after the test shall be within ± 20%.

Temperature：85 ± 3°C

Humidity：85 ± 5% RH

Duration：1000 hours

Load life No mechanical damage.

Resistance change after the test shall be within ± 20%.

Temperature：85 ± 2°C

Applied current：Rated current ✕ 70%

Duration：1000 hours

Stability No mechanical damage.

Resistance change after the test shall be within ± 20%. Temperature：125 ± 2°C

Duration：1000 hours

Accelerated damp heat

steady state No mechanical damage.

Resistance change after the test shall be within ± 20%.

Temperature：85 ± 3°C

Humidity：85 ± 5% RH

Applied current : Rated current ✕ 70%

Duration：1000 hours

PERFORMANCE

KAH 2402 102NA07

FUSING CHARACTERISTICS I2T – T CHARACTERISTICS

DISTRIBUTION OF FUSING CHARACTERISTICS DISTRIBUTION OF FUSING TIME

0.0001

0.001

0.01

0.1

100

1000

0.1 1 10 100

Applied current (A)

Fusing time (sec)

0.0001

0.001

0.01

0.1

0 20 40 60 80 100

200% of rated current is

400% of rated current is

Number of pcs

Fusing time (sec)

0.20A

0.25A

0.315A

0.50A

0.40A

0.63A

0.80A

1.00A

1.25A

1.60A

2.00A

2.50A

0.00001

0.0001

0.001

0.01

0.1

100

1000

0.0001 0.001 0.01 0.1 1 10 100

Fusing time (sec)

Joule integral (A2s)

0.20A

0.25A

0.315A

0.50A

0.40A

0.63A

0.80A

1.00A

1.25A

1.60A

2.00A

2.50A

0.0001

0.001

0.01

0.1

100

0.1 1 10 100

Applied current (A)

Fusing time (sec)

Fig.B

Determine the rated value of the micro fuse, and select the correct micro fuse for your circuit. If you select the correct micro fuse,

safety of your circuit can be ensured.

How to determine the rated value of the micro fuse is described below :

■Flow for fuse selection

1. Measurement of circuit values using actual device

Measure the circuit values, such as operating current of the circuit.

2. Calculation from operating current

From the obtained operating current and the category temperature, calculate the minimum rated value to determine the applicable

fuse.

3. Calculation from overload current

From the obtained overload current, calculate the maximum rated value to determine the applicable fuse.

4. Calculation from inrush current

From the inrush current, calculate the minimum rated value to determine the applicable fuse.

5. Final determination of rated value

From the calculation results of steps 2 through 4, determine the rated value.

6. Operation check using actual device

After selecting the rating, confirm if the device works properly under the pre-determined conditions.

■Fuse selection

1.Measurement of circuit values using actual device

Before determining the rated value of the fuse, preliminarily measure the following using the actual device.

1–1 Operating current

Using an oscilloscope or equivalents, measure the operating current of the circuit.

1–2 Overload current

Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.

1–3 Inrush current

Using an oscilloscope or equivalents, measure the inrush current of the circuit at power-on or power-off. In addition, determine

the number of inrush current applied.

1–4 Category temperature

Measure the ambient temperature of the fuse circuit.

EXAMPLE TO SELECT RATINGS OF TYPE KAH

Effective operating current : 1.2 A

Effective overload current : 6.0 A

Inrush current waveform : Fig. A

(Pulse width : 1 ms, Wave height : 6.0 A)

Numbers to withstand inrush current : 100,000 times

Category temperature : 85°C

2. Calculation from operating current

2–1 Measurement of operating current

Using an oscilloscope or equivalents, measure operating current (effective current) of the actual circuit.

Example : Effective operating current = 1.2 A

2–2 Derating

①Temperature derating factor

Using Fig. B, find the temperature derating factor correspond to the temperature.

②Rated derating factor

Rated derating factor = 0.75

Use Formula 1 to calculate the rated current of the fuse to be used for the circuit.

Rated current of fuse ≧ Operating current ／ (① ✕ ②) ... Formula 1

Example : Category temperature = 85°C, Operating current = 1.2 A

①Temperature derating factor = 0.90 (Refer to Fig. B.)

②Rated derating factor = 0.75

Calculation using Formula 1 :

Rated current ≧ 1.2／ (0.90 ✕ 0.75) = 1.78 A

The above calculation result shows that the fuse with rated current of 1.78 A or more should be selected for this circuit.

Type KAH, with rated current of 2.0 A or more can be selected.

Fig. A : Inrush current waveform

DETERMINATION OF RATED VALUE AND SELECTION OF MICRO

FUSE(TYPE KAH,SIZE

1005)

1ms

6.0

Ａ

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

-50 -25 0 25 50 75 100 125

Temperature (℃)

Derating factor (%)

3. Calculation from overload current

3–1 Measurement of overload current

Using an oscilloscope or equivalents, measure the overload current that needs to break the circuit.

Example : Effective overload current = 6.0 A

3–2 Calculation from overload current

Determine the rated current so that the overload current can be 2 times larger than the rated current.

Use Formula 2 to calculate the rated current of the fuse.

Rated current of fuse ≦ Overload current ／2.0 ... Formula 2

Example : Overload current = 6.0 A

Use Formula 2 to calculate the rated current.

Rated current ≦ 6.0／2.0 = 3.0 A

The above calculation result shows that the fuse with rated current of 3.0 A or less should be selected for this circuit.

Type KAH, with rated current of 2.5 A or less can be selected.

4. Calculation from inrush current

4–1 Measurement of inrush current waveform

Using an oscilloscope or equivalent, measure the waveform of the inrush

current of the actual circuit.

4–2 Creation of approximate waveform

Generally, the waveform of inrush current is complicated. For this reason,

create the approximate waveform of inrush current as shown on Fig. C to

simplify calculation.

4–3 Calculation of I2t of inrush current

Calculate I2t (Joule integral) of the approximate waveform.

The formula for this calculation depends on the approximate waveform.

Refer to Table A.

Example : Pulse applied = 1 ms, Peak value = 6.0 A,

Approximate waveform = Triangular wave

Since the approximate waveform is a triangular wave, use the

following formula for calculation

I2t of rush current = 1／3 ✕ Im2 ✕ t ... Formula 3

(Im : Peak value, t : Pulse applying time)

Use Formula 3 to calculate the I2t of the rush current :

I2t = 1／3 ✕ 6 ✕ 6 ✕ 0.001 = 0.012 (A2s)

* Following formula is generally used for calculation of I2t as i(t) equal to current.

I 2 t＝∫0ｔｉ2（t）dt

Name Waveform I 2 t Name Waveform I 2 t

Sine wave

(1 cycle )

Trapezoidal

wave

Sine wave

(half cycle) Various

wave 1

Triangular

wave Various

wave 2

Rectangular

wave

Charge/

discharge

waveform

JOULE

INTERGRAL VALUES FOR EACH WAVEFORM

1ms

Fig. C

: Inrush current waveform

Red line : Actual measurement waveform

Black line : Approximate waveform

I m2 t1 + I m2 (t2-t1) +

I m2 (t3-t2)

1t1+{I1I2+ (I1-I2) 2}

(t2-t1)+ I2

2(t3-t2)

I m

-t τ

i (t) = I m e-t/

I m

0.368 I m

I m

I 2

I 1

0 t1 t3

I 2

I 1

2 t + (

Table A

4–4 Search of load ratio

①Set up the number of cycles to withstand. (generally

100,000 times)

②Obtain the load ratio from Pulse resistance characteristics.

(Fig. D)

Example : 100,000 times is required against inrush current

applied.

Determine the load ratio using Fig. D.

If the rated current is 0.2 to 2.0 A : 30% or less

If the rated current is 2.5 A : 26% or less

4–5 Calculation from Joule integral and load ratio

Use Formula 4 to calculate the standard I2t for the fuse to be

used.

Standard I2t of fuse > (I2t of inrush current ／ load ratio) ..........

..........Formula 4

Example : I2t of pulse = 0.012 A2s,

Pulse applied = 1 ms, Required load ratio = 30% (at 0.2 to 2.0 A

Fuse) or 26% (at 2.5 A Fuse) :

Example of 2.0 A Fuse : Use Formula 4 to calculate the

standard I2t of fuse.

Standard I2t of fuse > 0.012/0.3 = 0.04 (A2s)

The standard I2t of the fuse should be 0.04 (A2s) or more.

Since the rush pulse applied is 1 ms, obtain the intersection

of 1 ms (horizontal axis) and 0.04 A2s (vertical axis) from

Fig. E (refer to the arrow shown on Fig. E).

Select a fuse whose curve is above the intersection. Type

KAH, with rated current of 2.0 A or more should be selected.

5. Final determination of rated value

Determine the rated current of the micro fuse. The rated

current should meet all the above calculation results.

Example : Rated current of 2.0 A and 2.5 A meet the all

requirements.

6. Operation check using actual device

After selecting the rating, confirm if the device works properly

under the pre-determined conditions.

Fig. D

Fig. E

PULSE RESISTANCE CHARACTERISTICS

JOULE INTEGRAL VS. FUSING TIME

100

1000

10000

100000

1000000

0 10 20 30 40 50 60 70 80 90 100

Load ratio (%)

Numbers of pulse resistance (cycle)

0.2A to 2.0 A

2.5A

0.20A

0.25A

0.315A

0.50A

0.40A

0.63A

0.80A

1.00A

1.25A

1.60A

2.00A

2.50A

0.00001

0.0001

0.001

0.01

0.1

100

1000

0.0001 0.001 0.01 0.1 1 10 100

Fusing time (s)

Joule integral (A2s)

Application Notes for Micro Fuse

1. Circuit Design

Micro Fuse should be designated only after confirming operating

conditions and Micro Fuse performance characteristics.

When determining the rated current, be sure to observe the following

items :

(1) Micro Fuse should always be operated below the rated current

(the value considered in the temperature derating rate) and voltage

specifications. According to item 2,2-2 in page 5.

(2) Micro Fuse should always be operated below the rated voltage.

(3) Micro Fuse should be selected with correct rated value to be fused

at overload current.

(4) When Micro Fuse are used in inrush current applications, please

confirm sufficiently inrush resistance of Micro Fuse.

(5) Please do not apply the current exceeding the breaking current to

Micro Fuse.

(6) Use Micro Fuse under the condition of category temperature.

(7) Micro Fuse should not be used in the primary power source.

Micro Fuse should be selected by determining the operating

conditions that will occur after final assembly, or estimating potential

abnormalities through cycle testing.

2. Assembly and Mounting

During the entire assembly process, observe Micro Fuse body

temperature and the heating time specified in the performance table.

In addition, observe the following items :

(1) Mounting and adjusting with soldering irons are not recommended

since temperature and time control is difficult.

In case of emergency for using soldering irons, be sure to observe

the conditions specified in the performance table.

(2) Micro Fuse body should not contact a soldering iron directly.

(3) Once Micro Fuse mounted on the board, they should never be

remounted on boards or substrates.

(4) During mounting, be careful not to apply any excessive

mechanical stresses to the Micro Fuse.

3. Solvents

For cleaning of Micro Fuse, immersion in isopropyl alcohol for 90

seconds (at 20 ~ 30°C liquid temp.) will not be damaged.

If organic solvents (Pine AlphaTM, Techno CareTM, Clean ThroughTM,

etc.) will be applied to the Micro Fuse, be sure to preliminarily check

that the solvent will not damage Micro Fuse.

4. Ultrasonic Cleaning

Ultrasonic cleaning is not recommended for Micro Fuse. This may

cause damage to Micro Fuse such as broken terminals which results

in electrical characteristics effects, etc. depending on the conditions.

If Ultrasonic cleaning process must be used, please evaluate the

effects sufficiently before use.

5. Caution During Usage

(1) Micro Fuse with electricity should never be touched. Micro Fuse

with electricity may cause burning due to Micro Fuse high

temperature. Also, in case of touching Micro Fuse without

electricity, please check the safety temperature of Micro Fuse.

(2) Protective eyeglasses should always be worn when performing

fusing tests. However, there is a fear that Micro Fuse will

explode during test. During fusing tests, please cover particles

not to fly outward from the board or testing fixture. Caution is

necessary during usage at all times.

6. Environmental Conditions

(1) Micro Fuse should not be operated in acid or alkali corrosive

atmosphere.

(2) Micro Fuse should not be vibrated, shocked, or pressed

excessively.

(3) Micro Fuse should not be operated in a flammable or explosive

atmosphere.

(4) Please do not use Micro fuse in the environment where dew

condensation occurs.

In case Micro fuse has to be used under the dew condensation

condition, please apply moisture-proof coating over Micro fuse.

Covering Micro fuse with moisture-proof coating may affect

electrical characteristics, please evaluate the effects sufficiently

before use.

7. Emergency

In case of fire, smoking, or offensive odor during operation, please

cut off the power in the circuit or pull the plug out.

8. Storage

(1) Micro Fuse should be stored at room temperature (-10°C ~

+40°C) without direct sunlight or corrosive atmosphere such as

H2S(hydrogen sulfide) or SO2(sulfur dioxide).

Direct sunlight may cause decolorization and deformation of the

exterior and taping.

Also, solderability will be remarkably lower in high humidity.

(2) If the products are stored for an extended period of time, please

contact Matsuo Sales Department for recommendation. The

longer storage term causes packages and tapings to worsen. If

the products will be stored for longer term, please contact us for

advice.

(3) The products in taping, package, or box should not be given

any kind of physical pressure. Deformation of taping or package

may affect automatic mounting.

9. Disposal

When Micro Fuse are disposed of as waste or “scrap”, they should

be treated as “industrial waste”. Micro Fuse contain various kinds

of metals and resins.

10. Samples

Micro Fuse received as samples should not be used in any

products or devices in the market. Samples are provided for a

particular purpose such as configuration, confirmation of electrical

characteristics, etc.

Please feel free to ask our sales department for more information on Micro Fuse.

Overseas Sales Dep： 5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan Tel : 06-6332-0883 Fax : 06-6332-0920

Head Office： 5-3, 3-Chome, Sennari-cho, Toyonaka-shi, Osaka 561-8558, Japan Tel : 06-6332-0871 Fax : 06-6331-1386

URL： http://www.ncc-matsuo.co.jp/

The specifications on this catalog are subject to change without prior notice. Please inquire of our Sales

Department to confirm the specifications prior to use.

MATSUO M A T S U O E L E C T R IC C O . , L T D .