DK
1ds_61A03_en_dk: 201113D
ORDERING INFORMATION
1a 10 A,1a1b/2a 8 A small
polarized power relays DK RELAYS
VDE
FEATURES
1. Compact with high capacity
High capacity switching in a small
package: 1 Form A, 10 A 250 V AC;
1 Form A 1 Form B and 2 Form A, 8 A
250 V AC.
2. High sensitivity: 200 mW nominal
operating power
3. High breakdown voltage
Independent coil and the contact
structure improves breakdown voltage.
Conforms with FCC Part 68
4. Latching types available
5. Sealed construction allows
automatic washing.
6. High insulation resistance
Creepage distance and clearances
between contact and coil: Min. 8 mm
DK2a-L2: 6.8 mm
DK1a1b-L2: 6.8 mm
7. Sockets are available
8. Complies with safety standards
Complies with Japan Electrical
Appliance and Material Safety Law
requirements for operating 200 V
power supply circuits, and complies
with UL, CSA, and TÜV safety
standards.
TYPICAL APPLICATIONS
1. Switching power supply
2. Power switching for various
OA equipment
3. Control or driving relays for
industrial machines (robotics,
numerical control machines, etc.)
4. Output relays for programmable
logic controllers, temperature
controllers, timers and so on.
5. Home appliances
About Cd-free contacts
We have introduced Cadmium free type
products to reduce Environmental
Hazardous Substances.
(The suffix “F” should be added to the
part number)
(Note: The Suffix “F” is required only for
1 Form A contact type. The 2 Form A and
1 Form A 1 Form B contact type is
originally Cadmium free, the suffix “F” is
not required.)
Please replace parts containing
Cadmium with Cadmium-free products
and evaluate them with your actual
application before use because the life of
a relay depends on the contact material
and load.
Between contact
and coil Between open contacts
4,000 Vrms for 1 min.
10,000 V surge
breakdown voltage
1,000 Vrms for 1 min.
1,500 V surge
breakdown voltage
Coil voltage (DC)
3, 5, 6, 9, 12, 24V
DK
Operating function
Nil:
L:
L2:
Single side stable
1 coil latching
2 coil latching
Contact arrangement
1a:
2a:
1a1b:
1 Form A
2 Form A
1 Form A 1 Form B
Notes: 1. UL/CSA, TÜV approved type is standard.
2. VDE approved type is available.
Contact material
F:
Nil:
1 Form A (AgSnO2 type)
2 Form A, 1 Form A 1 Form B (Au-flashed AgNi type)
DK
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ds_61A03_en_dk: 201113D
TYPES
Standard packing: Carton: 50 pcs.; Case: 500 pcs.
* For sockets, see page 8.
RATING
1. Coil data
1) Single side stable
2) 1 coil latching
3) 2 coil latching
Contact
arrangement Nominal coil
voltage Single side stable 1 coil latching 2 coil latching
Part No. Part No. Part No.
1 Form A
3V DC DK1a-3V-F DK1a-L-3V-F DK1a-L2-3V-F
5V DC DK1a-5V-F DK1a-L-5V-F DK1a-L2-5V-F
6V DC DK1a-6V-F DK1a-L-6V-F DK1a-L2-6V-F
9V DC DK1a-9V-F DK1a-L-9V-F DK1a-L2-9V-F
12V DC DK1a-12V-F DK1a-L-12V-F DK1a-L2-12V-F
24V DC DK1a-24V-F DK1a-L-24V-F DK1a-L2-24V-F
1 Form A
1 Form B
3V DC DK1a1b-3V DK1a1b-L-3V DK1a1b-L2-3V
5V DC DK1a1b-5V DK1a1b-L-5V DK1a1b-L2-5V
6V DC DK1a1b-6V DK1a1b-L-6V DK1a1b-L2-6V
9V DC DK1a1b-9V DK1a1b-L-9V DK1a1b-L2-9V
12V DC DK1a1b-12V DK1a1b-L-12V DK1a1b-L2-12V
24V DC DK1a1b-24V DK1a1b-L-24V DK1a1b-L2-24V
2 Form A
3V DC DK2a-3V DK2a-L-3V DK2a-L2-3V
5V DC DK2a-5V DK2a-L-5V DK2a-L2-5V
6V DC DK2a-6V DK2a-L-6V DK2a-L2-6V
9V DC DK2a-9V DK2a-L-9V DK2a-L2-9V
12V DC DK2a-12V DK2a-L-12V DK2a-L2-12V
24V DC DK2a-24V DK2a-L-24V DK2a-L2-24V
Nominal coil
voltage Pick-up voltage
(at 20C 68F)Drop-out voltage
(at 20C 68F)
Nominal operating
current
[10%] (at 20C 68F)
Coil resistance
[10%] (at 20C 68F)Nominal operating
power Max. applied voltage
(at 20C 68F)
3V DC
70%V or less of
nominal voltage
(Initial)
10%V or more of
nominal voltage
(Initial)
66.6mA 45
200mW 130%V of
nominal voltage
5V DC 40mA 125
6V DC 33.3mA 180
9V DC 22.2mA 405
12V DC 16.6mA 720
24V DC 8.3mA 2,880
Nominal coil
voltage Set voltage
(at 20C 68F)Reset voltage
(at 20C 68F)
Nominal operating
current
[10%] (at 20C 68F)
Coil resistance
[10%] (at 20C 68F)Nominal operating
power Max. applied voltage
(at 20C 68F)
3V DC
70%V or less of
nominal voltage
(Initial)
70%V or more of
nominal voltage
(Initial)
33.3mA 90
100mW 130%V of
nominal voltage
5V DC 20mA 250
6V DC 16.6mA 360
9V DC 11.1mA 810
12V DC 8.3mA 1,440
24V DC 4.1mA 5,760
Nominal coil
voltage Set voltage
(at 20C 68F)Reset voltage
(at 20C 68F)
Nominal operating
current
[10%] (at 20C 68F)
Coil resistance
[10%] (at 20C 68F)Nominal operating
power Max. applied voltage
(at 20C 68F)
Set coil Reset coil Set coil Reset coil Set coil Reset coil
3V DC
70%V or less of
nominal voltage
(Initial)
70%V or less of
nominal voltage
(Initial)
66.6mA 66.6mA 4545
200mW 200mW 130%V of
nominal voltage
5V DC 40mA 40mA 125125
6V DC 33.3mA 33.3mA 180180
9V DC 22.2mA 22.2mA 405405
12V DC 16.6mA 16.6mA 720720
24V DC 8.3mA 8.3mA 2,8802,880
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3ds_61A03_en_dk: 201113D
2. Specifications
Notes:
*1.This value can change due to the switching frequency , environmental conditions, and desired reliability level, therefore it is recommended to check this with the actual load.
*2.Wave is standard shock voltage of 1.250s according to JEC-212-1981
*3.The upper limit of the ambient temperature is the maximum temperature that can satisfy the coil temperature rise value. Refer to “6. Usage, Storage and Transport
Conditions“ in AMBIENT ENVIRONMENT section in Relay Technical Information.
Characteristics Item Specifications
Contact Arrangement 1 Form A 1 Form A 1 Form B 2 Form A
Contact resistance (Initial) Max. 30 m (By voltage drop 6 V DC 1A)
Contact material Au-flashed AgSnO2 type Au-flashed AgNi type
Rating
Nominal switching capacity (resistive load) 10 A 250 V AC, 10 A 30 V
DC 8 A 250 V AC,8 A 30 V DC 8 A 250 V AC,8 A 30 V DC
Max. switching power (resistive load) 2,500VA, 300 W 2,000 VA, 240 W 2,000 VA, 240 W
Max. switching voltage 250 V AC, 125 V DC 250 V AC, 125 V DC 250 V AC, 125 V DC
Max. switching current 10 A 8 A 8 A
Nominal operating power 200 mW
Min. switching capacity (Reference value)*110m A 5 V DC
Electrical
characteristics
Insulation resistance (Initial) Min. 1,000M (at 500V DC) Measurement at same location as “Breakdown voltage” section.
Breakdown voltage
(Initial) Between open contacts 1,000 Vrms for 1min. (Detection current: 10mA.)
Between contact and coil 4,000 Vrms for 1min. (Detection current: 10mA.)
Surge breakdown
voltage*2 (Initial) between contacts and coil 10,000 V
Temperature rise (coil) (at 65C 149F) Max. 40C (By resistive method, nominal voltage applied to the coil; max. switching current)
Operate time [Set time] (at 20C 68F)Max. 10 ms (Approx. 5 ms) [10 ms (Approx. 5 ms)]
(Nominal coil voltage applied to the coil, excluding contact bounce time.)
Release time [Reset time] (at 20C 68F)Max. 8 ms (Approx. 3 ms) [10 ms (Approx. 3 ms)]
(Nominal coil voltage applied to the coil, excluding contact bounce time.) (without diode)
Mechanical
characteristics
Shock resistance Functional Min. 98 m/s2 (Half-wave pulse of sine wave: 11 ms; detection time: 10s.)
Destructive Min. 980 m/s2 (Half-wave pulse of sine wave: 6 ms.)
Vibration resistance Functional 10 to 55 Hz at double amplitude of 1.5 mm (Detection time: 10s.)
Destructive 10 to 55 Hz at double amplitude of 3 mm
Expected life Mechanical Min. 5107 (at 300 times/min.)
Electrical Min. 105 (resistive load, at 20 times/min., at rated capacity)
Conditions Conditions for operation, transport and storage*3Ambient temperature: –40C to +65C –40F to +149F,
Humidity: 5 to 85% R.H. (Not freezing and condensing at low temperature)
Max. operating speed (at rated load) 20 times/min.
Unit weight Approx. 5 g .18 oz Approx. 6 g .21 oz Approx. 6 g .21 oz
DK
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REFERENCE DATA
1-(1). Maximum operating power (1 Form A) 1-(2). Maximum operating power
(1 Form A 1 Form B, 2 Form A) 2-(1). Life curve (1 Form A)
AC resistive load
DC resistive
load
DC inductive load
(L/R = 7 ms)
AC inductive load
(cosϕ= 0.4)
Contact voltage, V
Contact current, A
10 100 1,00
0
0.1
1
10
100
Contact voltage, V
Contact current, A
AC resistive load
DC inductive load
(L/R = 7 ms) DC resistive
load
AC inductive load
(cosϕ= 0.4)
0.1
1
5
10
10 100 1,00
0
01234567891
0
10
100
1,000
1
Life, ×104
Contact current, A
250 V AC resistive load
30 V DC resistive load
250 V AC inductive load (cosϕ= 0.4)
30 V DC inductive load (L/R = 7 ms)
2-(2). Life curve
(1 Form A 1 Form B, 2 Form A) 3-(1). Operate/Release time (1 Form A)
Tested sample: DK1a-24V, 5 pcs. 3-(2). Operate/Release time
(1 Form A 1 Form B, 2 Form A)
Tested sample: DK1a1b-12V, 5 pcs.
012345678910
10
100
1,000
1
Life, ×104
Contact current, A
250 V AC resistive load
30 V DC resistive load
250 V AC inductive load (cosϕ= 0.4)
30 V DC inductive load (L/R = 7 ms)
80 90 10 110 120 130 140
0
1
2
3
4
5
6
7
8
9
Coil applied voltage,%V
Operate/release time, ms
Release time
(with diode)
Operate time
Release time
x
x
Max.
Min.
Max.
Max.
Min.
Min.
x
80 90 10 110 120 130 140
0
1
2
3
4
5
6
7
8
9
Coil applied voltage,%V
Operate/release time, ms
Min.
Max.
x
Max.
Max.
Min.
Min.
Release time
(with diode)
Operate time
Release time
x
x
4-(1). Coil temperature rise (1 Form A)
Tested sample: DK1a-12V, 5 pcs.
Ambient temperature: 30C 86F
4-(2). Coil temperature rise
(1 Form A 1 Form B, 2 Form A)
Tested sample: DK1a1b-12V, 5 pcs.
Ambient temperature: 20C 68F
5-(1). Ambient temperature characteristics
(1 Form A)
Tested sample: DK1a-24V, 6 pcs
Ambient temperature: –40C to +80C
–40F to +176F
50
40
30
20
10
0
Coil temperature rise, °C
Coil applied voltage,%V
9080 100 110 120 130
10A
7A
5A
0A
80 90 100 110 120 130
0
10
20
30
40
50
Coil temperature rise, °C
Coil applied voltage,%V
8 A
5 A
0 A
Drop-out
voltage
-20-40 8060400 20
70
80
90
100
110
120
130
Pick-up
voltage
Ambient
temperature, °C
Variation ratio, %
5-(2). Ambient temperature characteristics
(1 Form A 1 Form B, 2 Form A)
100
20 Ambient
temperature,°C
Variation ratio, %
Pick-up
voltage
Drop-out
voltage
130
120
110
90
80
70
40 60 800-20-40
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5ds_61A03_en_dk: 201113D
DIMENSIONS (mm inch)Download from our Web site.
CAD Data
CAD Data
1. 1 Form A type
CAD Data External dimensions
Single side stable type
2 coil latching type
General tolerance: 0.3 .012
20 12.5
7.6210.16
0.80.4
0.4
3.5
1.2
0.8
1.11
9.7
0.3
10.16
.787 .492
.300.400
.031.016
.016
.138
.047
.031
.044
.382
.012
.400
20 12.5
7.627.622.54
0.80.4 0.4
0.4
3.5
1.2
0.8
1.11
9.7
0.3
10.16
.787 .492
.300.300.100
.031.016 .016
.016
.138
.047
.031
.044
.382
.012
.400
PC board pattern (Bottom view)
Tolerance: 0.1 .004
10.16
7.622.54 7.62 1.1 dia.
.400
.300.100 .300 .043 dia.
10.16
7.622.54 7.62 1.1 dia.
.400
.300.100 .300 .043 dia.
Schematic (Bottom view)
Single side stable
(Deenergized condition)
1 coil latching
(Reset condition)
2 coil latching
(Reset condition)
Since this is a polarized relay, the connection to the coil
should be done according to the above schematic.
134
6
-
+
+
134
6
-
134
65
-
++
DK
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SAFETY STANDARDS
Item UL/C-UL (Recognized) CSA (Certified) VDE (Certified) TÜV (Certified)
File No. Contact rating File No. Contact rating File No. Contact rating File No. Rating
1 Form A E43028 10A 250V AC
1/3HP 125, 250V AC
10A 30V DC
LR26550
etc. 10A 250V AC
1/3HP 125, 250V AC
10A 30V DC
006099UG AC 250V 10A (cos =1.0)
AC 250V 5A (cos=0.4)
DC 30V 10A (0ms)
8705
1645 520 10A 250V AC (cos =1.0)
5A 250V AC (cos=0.4)
10A 30V DC
1 Form A
1 Form B,
2 Form A
E43028 8A 250V AC
1/4HP 125, 250V AC
8A 30V DC
LR26550
etc. 8A 250V AC
1/4HP 125, 250V AC
8A 30V DC
006099UG 1 Form A 1 Form B:
AC 250V 8A (cos=1.0)
2 Form A:
AC 250V 8A (cos =1.0)
AC 250V 4A (cos =0.4)
8705 1645
520 (1 Form A
1 Form B)
9407 13461
097 (2 Form A)
8A 250V AC (cos =1.0)
4A 250V AC (cos =0.4)
8A 30V DC
2. 1 Form A 1 Form B type, 2 Form A type
CAD Data External dimensions
Single side stable type
2 coil latching type
General tolerance: 0.3 .012
20 15
7.6210.16
0.8
0.4 0.4
2.42
3.5
0.8
1.11
9.7
0.3
10.16
.787 .591
.300.400
.031
.016
.138
.031
.044
.382
.012
.400 .016
.095
15
0.4
2.42
3.5
10.16
20
7.627.622.54
0.8
0.4 0.6 0.8
1.11
9.7
0.3
.016
.095
.591
.138
.400
.787
.300.300.100
.031
.016 .024 .031
.044
.382
.012
PC board pattern (Bottom view)
Tolerance: 0.1 .004
10.16
10.16
7.62 1.1 dia.
.400
.400
.300 .043 dia.
10.16
7.627.622.54 1.1 dia.
.400
.300.300.100 .043 dia.
Schematic (Bottom view)
<2 Form A>
Single side stable
(Deenergized condition)
1 coil latching
(Reset condition)
2 coil latching
(Reset condition)
134
865
-
+
1
8
-
+
34
65
134
865
-
+7
+
Schematic (Bottom view)
<1 Form A 1 Form B type>
Single side stable
(Deenergized condition)
1 coil latching
(Reset condition)
2 coil latching
(Reset condition)
134
865
-
+
134
865
-
+
134
865
-
+7
+
Since this is a polarized relay, the connection to the coil should be done
according to the above schematic.
DK
7ds_61A03_en_dk: 201113D
NOTES
For Cautions for Use, see Relay Technical Information.
1. Soldering should be done under the
following conditions:
250C 482F within 10s
300C 572F within 5s
350C 662F within 3s
Soldering depth: 2/3 terminal pitch
2. External magnetic field
Since DK relays are highly sensitive
polarized relays, their characteristics will
be affected by a strong external magnetic
field. Avoid using the relay under that
condition.
3. When using, please be aware that
the a contact and b contact sides of 1
Form A and 1 Form B types may go on
simultaneously at operate time and
release time.
DK
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DIMENSIONS (mm inch)
ACCESSORIES DK RELAY
SOCKET
FEATURES
DK relay sockets that can be used also
for DY relay.
TYPES
Standard packing: Carton: 50 pcs.; Case: 500 pcs
Note: * 2 Form A type is DK relays only.
Type Part No.
1 Form A
Single side
stable DK1a-PS
2 coil
latching DK1a-PSL2
1 Form A 1 Form B,
2 Form A*
Single side
stable DK2a-PS
2 coil
latching DK2a-PSL2
RELAY COMPATIBILITY
Socket
Relay
1 Form A 1 Form A 1 Form B, 2 Form A
Single side
stable type 2 coil
latching type Single side
stable type 2 coil
latching type
1 Form A Single side stable type ——
2 coil latching type — ——
1 Form A 1 Form B
2 Form A Single side stable type — —
2 coil latching type — — —
SPECIFICATIONS
Item Specifications
Breakdown
voltage
4,000 Vrms
(Detection current: 10 mA)
(Except the portion between
coil terminals)
Insulation
resistance Min. 1,000 m (at 500 V DC)
Heat resistance 150C (for 1 hour)
Max. continuous
current 10 A (DK1a-PS, DK1a-PSL2),
8 A (DK2a-PS, DK2a-PSL2)
External dimensions
General tolerance: 0.3 .012
23±0.6
15±0.6
0.8
13.7±0.6
6±0.3
3.4±0.3
17±0.6
0.25
0.3±0.1
2.54±0.1 7.62±0.37.62±0.3 10.16±0.3
.906±.024
.591±.024
.031
.539±.024
.134±.012
.669±.024
.010
.012±.004
.100±.004 .300±.012.300±.012 .400±.012
.236±.012
PC board pattern (Bottom view)
1 Form A
The above shows 2 coil latching type. No.2 and 5
terminal are eliminated on single side stable type.
1 Form A 1 Form B
Tolerance: 0.1 .004
The above shows 2 coil latching type. No.2 and 7
terminal are eliminated on single side stable type.
2.54
2.54
1.2 dia.
12
65
43
.100
.100
.047 dia.
2.54
2.54
12
65
87
43 1.2 dia.
.100
.100
.047 dia.
DK
9ds_61A03_en_dk: 201113D
FIXING AND REMOVAL METHOD
1. Match the direction of relay and
socket.
2. Both ends of the relay are to be
secured firmly so that the socket hooks
on the top surface of the relay.
3. Remove the relay , applying force in the
direction shown below.
4. In case there is not enough space to
grasp the relay with fingers, use
screwdrivers in the way shown in the
illustration.
Notes: 1. Exercise care when removing relays. If
greater than necessary force is applied at
the socket hooks, deformation may alter the
dimensions so that the hook will no longer
catch, and other damage may also occur.
2. It is hazardous to use IC chip sockets.
GOOD NO GOOD
