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Page <1> V1.111/04/12
Metal Oxide Varistors
Straight Lead
Dimensions Table
Series 5D 7D 10D 14D 20D
D max 7 9.5 14 17.5 24
d* 0.6 0.6 0.8 0.8 1
W** 5 5 7.5 7.5 10
H max 12.5 14.5 20 22.5 29.5
H1 max 10 12 17 20.5 28
T max 4.9 4.9 8.5 8.5 9
P max 3 3 3 3 3
* ±0.02, ** ±1 Dimensions : Millimetres
Characteristics
•  High performance transient voltage suppression
•  Short response time to surge voltage
•  Low standby power dissipation
•  Excellent clamping characteristics
•  High performance withstanding surge currents
•  High reliability
Applications
•  Surge protection in:
Consumer electronics
Industrial electronics
Communication electronics
Measuring and controlling systems
Electronic home appliances
•  Protection against surges induced by lighting striking incoming power lines
•  Suppression of surges caused by switching inductive loads such as transformers, relays and coils
•  Protection of rectication diodes, SCRs, power transistors, semiconductor devices, etc
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Metal Oxide Varistors
Denition of Varistor Terms
Rated RMS Voltage, Rated DC Voltage
The maximum designated values of power system voltage that may be applied continuously between the terminals
of a device
Varistor Voltage
Test characteristic that is used to classify varistors by type. A test current of 1 mA DC is typically used to determine varistor
voltage classication type. Varistor voltage clamping characteristics can be dened at various test levels
Rated Peak Single Pulse Transient Current
Maximum surge current, 8 / 20 μs waveform which a varistor is rated to withstand for a single surge
Rated Single Pulse Transient Energy
Maximum allowable energy for a single impulse (see specied waveforms)
Maximum Clamping Voltage
Measured peak voltage across the device terminals when a current impulse of specied amplitude and waveform is 
conducted through the varistor
Typical Capacitance
Typical capacitance values are measured at a test frequency of 1 KHz. Capacitance values are only for reference purpose
only, not subject to outgoing inspection
General Characteristics
Power Dissipation Ratings (P, in-watts)
Storage Temperature : -55°C to +125°C
Operating Surface Temperature : 125°C
Operating Ambient Temperature  : -55°C to +85°C (without derating)
Maximum Voltage Temperature Coefcient  : < -0.05% / °C
Minimum Insulation Resistance  : 1,000 MΩ
Hi Pot (Leads To Case, 1 Minimum)  : 2,500V DC
Typical Response Time  : <15 nano-seconds
Epoxy Rating  : 94V-0
Current / Energy Derating (>85°C)  : -2.5% / °C
DC Leakage Current  : 200 μA maximum (at rated dc working voltage)
Solderability : MIL-STD-202F
Disc Size 11V AC to 40V AC 50V AC to 680V AC
5 mm 0.01 0.15
7 mm 0.02 0.25
10 mm 0.05 0.4
14 mm 0.1 0.6
20 mm 0.2 1
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Metal Oxide Varistors
Energy Derating Versus Temperature
Peak Current Per Pulse Versus Pulse Duration
Percent of Rated Power Energy
Ambient Temperature, °C
Percentage of Peak Current Rating
Pulse Duration, Microseconds
Number of Pulses on Order from 100%
Respectively :
1 Pulse
10 Pulses
102 Pulses
103 Pulses
104 Pulses
105 Pulses
106 Pulses
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Metal Oxide Varistors
Max.
Allowable
Voltage
Varistor
Voltage
Withstanding
Surge
Current
(8 / 20 μs)
Max. Clamping
Voltage
(8 / 20 μs)
Max. Energy Typical
Capacitance
Part Number
ACrms DC DC Volts 1 time Vc Ip 2 ms 10 /
1,000 s at 1 KHz
Volts Volts Min. Max. Amperes Volts Amperes Joules PF
11 14 16 20 100 36 1 0.4 0.6 1,500 MCV180K05DS
14 18 20 24 100 43 1 0.6 0.8 1,260 MCV220K05DS
17 22 24 30 100 53 1 0.7 0.9 1,050 MCV270K05DS
20 26 30 36 100 65 1 0.9 1.2 850 MCV330K05DS
25 31 35 43 100 77 1 1.1 1.3 600 MCV390K05DS
30 38 42 52 100 93 1 1.4 1.6 500 MCV470K05DS
35 45 50 62 100 110 1 1.5 1.9 400 MCV560K05DS
40 56 61 75 100 135 1 1.8 2.3 360 MCV680K05DS
50 66 74 90 400 135 5 2.4 3 350 MCV820K05DS
75 102 108 132 400 200 5 3 5 250 MCV121K05DS
95 127 135 165 400 250 5 3.5 5.5 180 MCV151K05DS
130 175 185 225 400 340 5 5 8.5 140 MCV201K05DS
150 200 216 264 400 395 5 6.5 10 115 MCV241K05DS
230 300 324 396 400 595 5 9 13 80 MCV361K05DS
250 330 351 429 400 650 5 10 15 75 MCV391K05DS
275 370 387 473 400 710 5 11 16 65 MCV431K05DS
300 385 423 517 400 775 5 13 19 55 MCV471K05DS
420 560 612 748 400 1,120 5 21 30 30 MCV681K05DS
Varistors - 5D Series
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Metal Oxide Varistors
Max.
Allowable
Voltage
Varistor
Voltage
Withstanding
Surge
Current
(8 / 20 μs)
Max. Clamping
Voltage
(8 / 20 μs)
Max. Energy Typical
Capacitance
Part Number
ACrms DC DC Volts 1 time Vc Ip 2 ms 10 /
1,000 s at 1 KHz
Volts Volts Min. Max. Amperes Volts Amperes Joules PF
11 14 16 20 250 36 2.5 0.8 1 2,900 MCV180K07DS
14 18 20 24 250 43 2.5 0.9 1.3 2,400 MCV220K07DS
17 22 24 30 250 53 2.5 1 1.4 1,800 MCV270K07DS
20 26 30 36 250 65 2.5 1.2 1.7 1,500 MCV330K07DS
25 31 35 43 250 77 2.5 1.5 2.1 1,230 MCV390K07DS
30 38 42 52 250 93 2.5 1.8 2.5 950 MCV470K07DS
35 45 50 62 250 110 2.5 2.2 3.1 890 MCV560K07DS
40 56 61 75 250 135 2.5 2.5 3.8 850 MCV680K07DS
50 66 74 90 1,200 135 10 3.5 5.5 830 MCV820K07DS
75 102 108 132 1,200 200 10 5 7.8 570 MCV121K07DS
95 127 135 165 1,200 250 10 6.5 9.7 400 MCV151K07DS
130 175 185 225 1,200 340 10 10 13 275 MCV201K07DS
150 200 216 264 1,200 395 10 11 16 230 MCV241K07DS
230 300 324 396 1,200 595 10 15 25 155 MCV361K07DS
250 330 351 429 1,200 650 10 17 26 145 MCV391K07DS
275 370 387 473 1,200 710 10 20 28 130 MCV431K07DS
300 385 423 517 1,200 775 10 21 30 115 MCV471K07DS
420 560 612 748 1,200 1120 10 32 45 78 MCV681K07DS
Varistors - 7D Series
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Metal Oxide Varistors
Max.
Allowable
Voltage
Varistor
Voltage
Withstanding
Surge
Current
(8 / 20 μs)
Max.Clamping
Voltage
(8 / 20 μs)
Max. Energy Typical
Capacitance
Part Number
ACrms DC DC Volts 1 time Vc Ip 2 ms 10 /
1,000 s at 1 KHz
Volts Volts Min. Max. Amperes Volts Amperes Joules PF
11 14 16 20 500 36 5 1.5 2.1 6,000 MCV180K10DS
14 18 20 24 500 43 5 2 2.5 5,000 MCV220K10DS
17 22 24 30 500 53 5 2.5 3 4,000 MCV270K10DS
20 26 30 36 500 65 5 3 4 3,500 MCV330K10DS
25 31 35 43 500 77 5 3.5 4.6 3,100 MCV390K10DS
30 38 42 52 500 93 5 4.5 5.5 2,800 MCV470K10DS
35 45 50 62 500 110 5 5.5 7 2,400 MCV560K10DS
40 56 61 75 500 135 5 6.5 8.2 2,100 MCV680K10DS
50 66 74 90 2,500 135 25 8 12 1,600 MCV820K10DS
75 102 108 132 2,500 200 25 12 18 1,200 MCV121K10DS
95 127 135 165 2,500 250 25 16 22 1,100 MCV151K10DS
130 175 185 225 2,500 340 25 20 30 640 MCV201K10DS
150 200 216 264 2,500 395 25 25 35 560 MCV241K10DS
230 300 324 396 2,500 595 25 35 47 380 MCV361K10DS
250 330 351 429 2,500 650 25 40 60 350 MCV391K10DS
275 370 387 473 2,500 710 25 45 65 310 MCV431K10DS
300 385 423 517 2,500 775 25 46 70 280 MCV471K10DS
420 560 612 748 2,500 1,120 25 50 74 130 MCV681K10DS
Varistors - 10D Series
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Metal Oxide Varistors
Max.
Allowable
Voltage
Varistor
Voltage
Withstanding
Surge
Current
(8 / 20 μs)
Max. Clamping
Voltage
(8 / 20 μs)
Max. Energy Typical
Capacitance
Part Number
ACrms DC DC Volts 1 time Vc Ip 2 ms 10 /
1,000 s at 1 KHz
Volts Volts Min. Max. Amperes Volts Amperes Joules PF
11 14 16 20 1,000 36 10 3.5 4 15,000 MCV180K14DS
14 18 20 24 1,000 43 10 4 5 12,000 MCV220K14DS
17 22 24 30 1,000 53 10 5 6 8,500 MCV270K14DS
20 26 30 36 1,000 65 10 6 7.5 7,200 MCV330K14DS
25 31 35 43 1,000 77 10 7 8.6 6,300 MCV390K14DS
30 38 42 52 1,000 93 10 8.5 10 5,500 MCV470K14DS
35 45 50 62 1,000 110 10 10 11 4,800 MCV560K14DS
40 56 61 75 1,000 135 10 12 14 4,000 MCV680K14DS
50 66 74 90 4,500 135 50 15 22 3,300 MCV820K14DS
75 102 108 132 4,500 200 50 22 34 2,600 MCV121K14DS
95 127 135 165 4,500 250 50 30 45 2,000 MCV151K14DS
130 175 185 225 4,500 340 50 38 60 1,370 MCV201K14DS
150 200 216 264 4,500 395 50 45 66 1,060 MCV241K14DS
230 300 324 396 4,500 595 50 70 98 725 MCV361K14DS
250 330 351 429 4,500 650 50 72 102 665 MCV391K14DS
275 370 387 473 4,500 710 50 75 115 600 MCV431K14DS
300 385 423 517 4,500 775 50 80 125 570 MCV471K14DS
Varistors - 14D Series
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Metal Oxide Varistors
Max.
Allowable
Voltage
Varistor
Voltage
Withstanding
Surge
Current
(8 / 20 μs)
Max. Clamping
Voltage
(8 / 20 μs)
Max. Energy Typical
Capacitance
Part Number
ACrms DC DC Volts 1 time Vc Ip 2 ms 10 /
1,000 s at 1 KHz
Volts Volts Min. Max. Amperes Volts Amperes Joules PF
11 14 16 20 2,000 36 20 10 12 27,000 MCV180K20DS
14 18 20 24 2,000 43 20 13 15 20,000 MCV220K20DS
17 22 24 30 2,000 53 20 15 17 15,000 MCV270K20DS
20 26 30 36 2,000 65 20 22 22 12,200 MCV330K20DS
25 31 35 43 2,000 77 20 24 26 10,000 MCV390K20DS
30 38 42 52 2,000 93 20 30 33 9,350 MCV470K20DS
35 45 50 62 2,000 110 20 35 38 8,000 MCV560K20DS
40 56 61 75 2,000 135 20 40 43 6,800 MCV680K20DS
50 66 74 90 6,500 135 100 37 48 5,600 MCV820K20DS
75 102 108 132 6,500 200 100 40 55 4,100 MCV121K20DS
95 127 135 165 6,500 250 100 50 70 3,200 MCV151K20DS
130 175 185 225 6,500 340 100 70 95 2,200 MCV201K20DS
150 200 216 264 6,500 395 100 82 110 1,900 MCV241K20DS
230 300 324 396 6,500 595 100 120 163 1,320 MCV361K20DS
250 330 351 429 6,500 650 100 130 180 1,210 MCV391K20DS
275 370 387 473 6,500 710 100 140 190 1,120 MCV431K20DS
300 385 423 517 6,500 775 100 150 220 1,000 MCV471K20DS
Varistors - 20D Series
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Metal Oxide Varistors
Mechanical Ratings
Characteristics Test method and specications
Standard Test Condition Temperature range : 5 to 35°C
Relative humidity : 45 to 85% R.H.
Varistor Voltage Voltage across the varistor measured at 1 mA DC rectangular pulse current
Maximum Allowable Voltage Maximum continuous sinusoidal RMS voltage or DC voltage which may be applied 
within the specied environmental temperature range
Maximum Clamping Voltage
Peak voltage across the varistor under condition of a specied standard impulse current
(8 / 20 μs)
Withstanding Surge Current Maximum current across the varistor measured at a given standard waveform (8 / 20 μs) 
applied one time or two times with the varistor voltage less than ±10%
Rated Transient Average Power
Dissipation
Maximum average power which may be dissipated due to a group of pulses occurring
within a specied isolated time period, without causing device failure
Maximum Energy The maximum energy within the varistor voltage change of ±10% when one impulse of 
2 ms or 10 / 1,000 μs is applied
Capacitance (Reference) Capacitance between the terminals of the varistor measured at 1 KHz,1 Vrms, zero bias
and room temperature (Exception 100 pF below measured at 1 MHz)
Temperature Coefcient of 
Varistor Voltage
(V at 85°C to V at 25°C) / ( V at 25°C × 60) × 100 (% / °C) should be
less than -0.05% / °C
Withstanding Voltage 
(Body insulation)
The specied voltage shall be applied both terminals of the varistor connected together 
and metal foil closely wrapped round its body for 1 minute without breakdown
Impulse Life
The variation of varistor voltage should less than ±10% after the impulse listed below is 
applied 10,000 times continuously with the interval of 10 seconds at room temperature
Crest value
Impulse width
Current(%)
5D series
MCV180K05DS to MCV680K05DS 0.5A (2 ms)
MCV681K05DS NA
MCV820K05DS to MCV471K05DS 20A (8 / 20 μs)
7D series
MCV180K07DS to MCV680K07DS 18A (8 / 20 μs)
MCV681K07DS NA
MCV820K07DS to MCV471K07DS 50A (8 / 20 μs)
10D series
MCV180K10DS to MCV680K10DS 50A (8 / 20 μs)
MCV681K10DS NA
MCV820K10DS to MCV112K10DS 100A (8 / 20 μs)
14D series MCV180K14DS to MCV680K14DS 75A (8 / 20 μs)
MCV820K14DS to MCV112K14DS 150A (8 / 20 μs)
20D series MCV180K20DS to MCV680K20DS 100A (8 / 20 μs)
MCV820K20DS to MCV112K20DS 200A (8 / 20 μs)
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Metal Oxide Varistors
Mechanical Ratings
Characteristics Test Method and Specications
Terminal Pull Strength
The two terminals shall be no outstanding damage visually after gradually applying the
force listed below
Terminal Bending Strength
Hold the specimen and keep its lead-out axis vertical Suspend 1 Kg weight on the
terminal. Bend the specimen through 90° then return to the original position. Repeat 
the procedure in the opposite direction. Test and examine every terminal
Vibration
Varistors subjected to simple harmonic motion of 0.75 mm amplitude between limits of 
10 to 55 Hz. Frequency scan shall be traversed in 1 minute. This motion shall then be
applied for period of 2 hours in each of three mutually perpendicular directions.
Thereafter, varistors shall be no outstanding damage visually
Solderability
The two terminals shall be covered uniformly with solder approximately 95% after 
dipping the terminals to a depth of approximately 3 mm from the body in a soldering
bath of 260 ±5°C for 2 ±0.5 seconds
Resistance to Soldering Heat
Varistors shall be no outstanding damage and the variation varistor voltage should 
be less than ±5% (∆VB / VB = ±5%) after each lead shall be dipped into a solder bath 
having a temperature 300 ±5°C to a point 2 to 2.5 mm from the body of the unit, using
the shielding board (thickness 1.5 mm), be held there for a specied time 
(5D series 5 ±1 second the other series 10 ±1 second), and then be stored at room 
ambient for 1 to 2 hours
Dry Heat (High Temperature)
Varistors shall be subjected to 125 ±2°C, for 1,000 hours in a thermostatic bath without
load and then stored at room ambient condition for 1 to 2 hours. The variation of
varistor voltage should be less than ±5% (∆VB / VB = ±5%)
Damp Heat (Humidity)
Varistors shall be subjected to 40 ±2°C, 90 to 95% R.H. for 1,000 hours in a thermostatic 
bath without load and then stored at room ambient condition for 1 to 2 hours.
The variation of varistor voltage should be less then ±5%(∆VB / VB = ±5%)
Cold (Low Temperature Storage)
Varistors shall be subjected to -40 ±2°C for 1,000 hours in a thermostatic bath without
load and then stored at room ambient condition for 1 to 2 hours. The variation of
varistor voltage should be less than ±5% (∆VB / VB = ±5%)
Temperature Cycle
(Thermal Shock)
The temperature cycling listed below shall be repeated 5 times and the variation of
varistor voltage should be less than ±5% and no outstanding damage visually
Dry Heat Load (High Temperature)
Varistors shall be subjected to 85 ±2°C for 1,000 hours in a thermostatic bath with 
maximum allowable voltage continuously applied and then stored at room ambient
condition for 1 to 2 hours. The variation of varistor voltage should be less
than ±10% (∆VB / VB = ±10%)
Terminal Diameter Force
0.6 mm 9.8 N (1 kgf)
0.8 mm 9.8 N (1 kgf)
1 mm 19.6 N (2 kgf)
Step Temperature (°C) Time (Minutes)
1 40 ±2 30 ±2
2Room Temperature 3 Maximum
3 125 ±2 30 ±2
4Room Temperature 3 Maximum
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Metal Oxide Varistors
Important Notice : This data sheet and its contents (the “Information”) belong to the members of the Premier Farnell group of companies (the “Group”) or are licensed to it. No licence is granted 
for the use of it other than for information purposes in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change
without notice and replaces all data sheets previously supplied. The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any 
error in or omission from it or for any use made of it. Users of this data sheet should check for themselves the Information and the suitability of the products for their purpose and not make any
assumptions based on information included or omitted. Liability for loss or damage resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the
Group was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict the Group’s liability for death or personal injury resulting from its negligence. 
Multicomp is the registered trademark of the Group. © Premier Farnell plc 2012.
Materials Safety Data Sheet
Part Number Explanation:
MCV 121 K 10 D S
Main Purposes %Chemical Substances Chemical formula % Typical ppm
Ceramic 26
Zinc oxide ZnO 89.7 -
Bismuth trioxide Bi2O32.8 69 PPm pb
Boron trioxide B2O30.005 -
Titanium dioxide TiO20 -
Nickel oxide NiO 0.75 -
Aluminium trioxide Al2O30.018 -
Silver Paste 2 Silver Ag 80 10PPm pb
Glass - 4
Coating 40 Epoxy resin - 30 to 40 5 PPm pb
Filler - 45 to 55
Wire 30 Copper Cu 96
66 PPm pb
Plating
(Lead free) 2Nickel Ni 0
Tin Sn 96
Plating
(Lead contained) 0.04
Nickel Ni 100 2,200
Lead Pb 10 200
Tin Sn 90 1,300
Varistor Voltage  : (DC volt) (from 180 to 112) two signicant digits followed by number of zeros
  : 180 = 18V, 101=100V, 102=1,000V
Tolerance  : K = ±10%
Disk Size Code  : 05 = 5mm, 07 = 7mm, 10 = 10mm, 14 = 14mm, 20 = 20mm
Disk Type  : D = Standard disk type
Lead Type Taping Code  : S = Straight Lead
Varistor Voltage Disk Size Code Lead Type
Taping Code
Disk TypeTolerance
Component type / Wistron P/N : Varistor