# Automotive Relay, 12 VDC, 250 A, SPST-NO, Panel Mount, Screw, EV-A Series
**URL**: https://novapart.co/products/AEVA1251/automotive-relay-12-vdc-250-a-spst-no-panel-mount
**SKU**: AEVA1251
**Manufacturer**: PANASONIC
**Category**: Switches & Relays || Relays || Automotive Relays
**Price**: €146.4500
**Stock**: 10+
**Lead Time**: 155 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Coil Voltage | 12VDC |
| Product Range | EV-A Series |
| Relay Mounting | Panel Mount |
| Coil Resistance | 24ohm |
| Contact Current | 250A |
| Relay Terminals | Screw |
| Contact Material | Copper Alloy |
| Contact Configuration | SPST-NO |
| Contact Voltage Dc Nom | 500V |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4203958/)
## Panason ~~i~~ c Automation Controls Catalog **High voltage & High** EV-A RELAYS **Capacity Relays realized 500V DC cut off (DC contactors)** ~~—~~ **FEATURES TYPICAL APPLICATIONS**
- **TYPICAL APPLICATIONS 1. Electric Vehicles (PHEV, BEV, and FCV)**
**1. One of the smallest and lightest weight in 250A class**
**2. Quick charge application 3. High voltage DC applications such as hybrid construction equipment**
**2. Realized 8,000A short circuit tolerance**
**3. High cut-off capacity 1,800A at 500VDC without contact polarity**
## **RoHS compliant**
## **ORDERING INFORMATION**
**AEVA** ~~T~~ Coil terminal structure ~~4~~ Contact rating 1 Rated coil voltage 1:1a Vertical 25：250A 1：12V DC
## **TYPES**
Packing Contact rating Nominal coil voltage Rated coil voltage Part No Carton. ~~———————Ee~~ 250A 1 Form A 12V DC **AEVA1251** 20 pcs (packed with 20pcs / 1 tray) **Coil Data** Operate (Set) Release (Reset) Rated operating Coil resistance Rated operating Max. allowable Rated coil voltage (at 20voltage°C)(Initial) (at 20voltage°C)(Initial) (±10%, at current20°C) (±10%, at 20°C) (at power20°C) voltage 12 V DC Max. 9.0V DC Min. 0.5V DC 0.5 A 24 Ω 6.0 W 16 V DC ~~moet ——} | | ft~~
2019.05
industrial.panasonic.com/ac/
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ASCTB418E 201904
> c Panasonic Corporation 2019
Automotive Relays EV-A RELAYS
## **SPECIFICATIONS**
**==> picture [511 x 352] intentionally omitted <==**
**----- Start of picture text -----**
Item Specifications
Contact arrangement 1 Form A
Contact material Copper alloy
Rated switching capacity (resistive) 250A 500V DC
Contact data Max. carrying current 250A continuous (50mm [2] wire)
Min. switching load (resistive)* [1] 1A 12V DC (at 20°C)
Contact voltage drop (initial) Max. 0.125V (250A carry current)
Short circuit capacity 8,000A (at Max. 5ms), No smoke and no ignition
Min 100MΩ (at 1,000V DC, Measurement portion is the same as the case of
Insulation resistance (initial) dielectric strength.)
Dielectric strength Between open contacts 2,500Vrms for 1 min. (Detection current :10mA)
(initial) Between contacts and coil 2,500Vrms for 1 min. (Detection current :10mA)
Operate (Set) time Max. 50ms (at rated coil voltage at 20°C, without bounce)
Time characteristics
(initial)
Release (Reset) time Max. 30ms (at rated coil voltage at 20°C, without diode)
For ON: Min. 588m/s² (half-sine shock pulse: 11ms, detection time :10μs)
Functional
Shock resistance For OFF: Min. 147m/s² (half-sine shock pulse: 11ms detection time :10μs)
Destructive Min. 588m/s² (Half-sine shock pulse :11ms)
Functional 10 to 200Hz, 44.1m/s² (detection time :10μs)
Vibration resistance Destructive 10 to 200Hz, 44.1m/s² (Time of vibration for each direction ; X, Y, Z direction
:4hours)
Mechanical life Min. 2×10 [5] (at 60 cpm)
Expected life Switch off life * [2] * [3] 1,800A 500V DC, Min. 1 operation (No polarity)
Inrush resistance current (capacitor) 140A 20V DC, Min. 70,000 operations
Conditions Conditions for usage, transport and storage * [4] Ambient temperature: -Humidity: 5 to 85%R.H (40Avoid icin to +85°C g or condensation)
Unit Weight Approx. 400g
**----- End of picture text -----**
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 The performance value applies when a varistor is connected in parallel to the coil. Please be warned that working life will be reduced when a diode is used. *3 at L/R≦1ms
*4 The upper operation ambient temperature limit is the maximum temperature that can satisfy the coil temperature rise value. For details, please refer to the "Automotive Relay Users Guide".
## **REFERENCE DATA**
## 1. Ambient temperature characteristics
Sample: AEVA1251, 6pcs.
## 2. Max. switching capacity
Sample: AEVA1251
3. Switching life curve (Forward direction)
Sample: AEVA1251
**==> picture [511 x 164] intentionally omitted <==**
**----- Start of picture text -----**
50 1,000 100,000
40
Release 500V DC resistive load
30 voltage 10,000
20
100
10 Operate 1,000 500V DC resistive load
-40 -20 0 voltage
40 60 80
-10 Ambient 100
temperature, °C 10
-20
-30 10
-40
-50 11 10 100 1000 1 1 10 100 1,000
Contact voltage, V Contact current, A
Variation ratio, %
Life, cycle
Contact current, A
**----- End of picture text -----**
Panasonic Corporation Electromechanical Control Business Division industrial.panasonic.com/ac/e/
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ASCTB418E 201904
> c Panasonic Corporation 2019
Automotive Relays EV-A RELAYS
## 4. Switch-off life curve
Sample: AEVA1251
## 5. Carrying performance life curve (85°C)
Sample: AEVA1251
**==> picture [324 x 142] intentionally omitted <==**
**----- Start of picture text -----**
10,000 100,000
10,000
1,000
1,000
500V DC resistive load
100
100
10
10
1 1
1 10 100 1,000 10,000 1 10 100 1,000
Contact current, A Contact current, A
Life, cycle Time, sec
**----- End of picture text -----**
## **DIMENSIONS**[ (mm)]
**==> picture [509 x 398] intentionally omitted <==**
**----- Start of picture text -----**
CAD The CAD data of the products with a "CAD" mark can be downloaded from our Website.
= CAD External dimensions Schematic (Top view)
M6 Screw
Depth Min. 8.5mm
70.5 ±0.5
Coil（－）
a Coil（＋）
—asor &
(-) No polarity on the load side.
Coil side has polarities(+) and (-).
(+)
Ld 25.5 ±0.5
(Top of connector)
43.8
PT
| Mounting dimensions
: Mounting hole
2×6.0±0.2 dia.
70.5±0.2
| “o — I
e | 56.5 A Male connector part No. |e
：7282-1020 (YAZAKI)
84.5
(Reference)
Female connector part No.
：7283-1020 (YAZAKI)
Tolerance
Less than 10mm: ±0.3
10 to 50mm: ±0.6
More than 50mm: ±1.0
2×6.0
42.5 ±0.5
28.5
74.5
63.0 0.2±
5.7 28.5
(Coller height)
**----- End of picture text -----**
Panasonic Corporation Electromechanical Control Business Division industrial.panasonic.com/ac/e/
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ASCTB418E 201904
> c Panasonic Corporation 2019
Automotive Relays EV-A RELAYS
## **Notes**
## **Safety precautions**
We are doing our best to constantly improve the quality and reliability of our products. However, some electric items/components do in fact fail despite our efforts. The durability of products also varies depending on service environments and conditions. Please check your product under actual service conditions before use. If you continue to use a product in a poor condition, items with deteriorated insulation
performance may generate abnormal heat or smoke or even ignite. The product's failure or end of service life may cause accidents involving risks to human health, fire, or danger to the public at large. We advise you to apply safety measures and regular maintenance work, such as the use of redundant design, fireproofing, and malfunction-preventing design, to rule out such accidents.
## **For general cautions for use, please refer to the "Automotive Relay Users Guides".**
## **Precautions when using EV-A relays**
## **●Usage, transport and storage conditions**
- 1) Ambient temperature, humidity and air pressure during usage, transport and storage of the relay.
- (1) Ambient temperature: –40 to +85°C
- (2) Humidity: 5 to 85% R.H.
- (Avoid icing and condensation.)
## **● When installing the relay, always use washers to prevent the screws from loosening.**
## **●Condition of tightening screw**
Tightening torque for fixing relay body (M5 screw) : 3.0Nm to 4.0Nm Tightening torque for fixing contact terminals (M6 screw) : 6.0Nm to 8.0Nm
- (3) Air pressure: 86 to 106 kPa
Note: The humidity range varies with the temperature. Use within the range indicated in the graph below.
- [Temperature and humidity range for usage, transport, and storage]
**==> picture [193 x 121] intentionally omitted <==**
**----- Start of picture text -----**
Humidity （％ RH ）
85
Allowa bl e range
Avoid Icing when Avoid condensation when
used at temperatures used at temperatures
lower than 0°C higher than 0°C
5
-40 0 85
Ambient Temperature(°C)
**----- End of picture text -----**
- 2) Water condensation
Water condensation occurs when the ambient temperature drops suddenly from a high temperature and humidity, or, the relay is suddenly transferred from a low ambient temperature to a high temperature and humidity. Condensation causes the failures like insulation deterioration, wire disconnection and rust etc. Panasonic Corporation does not guarantee the failures caused by condensation.
## **●Electrical life**
This relay is a high-voltage direct-current switch. In its final breakdown mode, it may lose the ability to provide the proper switch-off. Therefore, do not exceed the indicated switching capacity and life. (Please treat the relay as a product with limited life and replace it when necessary.)
In the event that the relay loses switch-off ability, there is a possibility that burning may spread to surrounding parts, so configure the layout so that the power is turned off within one second.
## **●Permeation life of internal gas**
This relay uses a hermetically encased contact (capsule contact) with gas inside. The gas has a permeation life that is affected by the temperature inside the capsule contact (Ambient temperature and temperature rise due to flow of electrical current). For this reason, make sure the ambient operating temperature is between –40 and +85°C ,and the ambient storage temperature is between –40 and +85°C.
## **● The coil of the relay are polarized, so follow the connection schematic when connecting the coil.**
- **Be careful that foreign matter and oils and fats kind don’t stick to the main terminal portion because it is likely to cause terminal portion to give off unusual heat.**
- 3) Low-temperature, low-humidity atmosphere;
- If the relay is exposed to a low-temperature, low-humidity atmosphere for a long time, its plastic parts may become brittle and fragile.
- **Avoid excessive load applied to the terminal in case of installing such as a bus bar etc., Because it might adversely affect the switching performance.**
## 4) Storage
Do not keep under high-temperature and high-humidity.
- **Use the specified connector for the connector terminal connection.**
Yazaki Corporation : 7283-1020 or equivalent
## **●Other cautions for use**
- 1) Please make sure to contact our sales representative when the product is used not in accordance with its specifications. Your nearest sales office will review the required specification from your company and perform confirmation tests in actual condition as needed.
- 2) When the voltage is applied to the relay coil beyond the max. allowable voltage range, the relay operation cannot be assured. Additionally the ambient temperature and condition of your application should be considered under the worst condition of the actual usage because they may change the relay operate and release voltage.
- 3) If it includes ripple, the ripple factor should be max. 5%. In addition, do not have a parallel connection with diode for the purpose of coil surge absorber. If only diode is connected in parallel to the relay coil, break performance of relay cannot be assured because contact release speed becomes slower. So do not use such a circuit. Instead of diode, a Varistor (ZNR) or Zener diode (ZD) when clamp voltage is 1.5 times larger than the rated voltage (Min. 18V for the rated 12V-relay), shall be used for the absorber.
- It is not allowed to apply the continuous maximum voltage to the coil. In order to obtain the specified performance, please apply the rated voltage.
Panasonic Corporation Electromechanical Control Business Division industrial.panasonic.com/ac/e/
-4c Panasonic Corporation 2019
ASCTB418E 201904
Automotive Relays EV-A RELAYS
## Ex.1 When Varistor (ZNR) is used
|Recommended Varistor|Energy capability: Min 1 J
(However, please set up the value with
consideration of the worst value in use
condition.)|
|---|---|
|Varistor Voltage|Min. 18V at 12V DC|
Ex.2 When Zener diode (circuit) is used 1)
**==> picture [239 x 178] intentionally omitted <==**
**----- Start of picture text -----**
12V
ＺＤ18V
Relay ZD18V+
Coil D Diode voltage Clamp voltage
2)
12V
Relay ZD30V Zener voltage
Coil
30V-12V=18V Clamp voltage
ＺＤ30V
**----- End of picture text -----**
- 4) Lifetime is specified under the standard test conditions in JIS C 5442. (temperature 15°C to 35°C humidity 25%RH to 75%RH) Lifetime is dependent on the coil driving circuit, load type, operation frequency and ambient conditions. Check lifetime under the actual condition.
- We can not guarantee the relay's quality in case the relay is operated without load current. (Dry switching)
- 5) If the relay is dropped, it should not be used again.
- 6) Please contact our sales representative when AC load gets applied to this relay. Careful handing is required for switching AC load with this relay.
- 7) Please check the internal connection diagram in the catalog or specification, and connect the terminals correctly. If any wrong connection is made, it may cause circuit damage by unexpected malfunction, abnormal heat, fire, and so on.
- 8) Please check the insulation distance between each terminal and ground.
- 9) Please assure the evaluation of the relay under the actual worst condition to enhance the reliability for the actual usage.
- 10) Please absolutely avoid the ultrasonic and high frequency vibration to the relay that adversely affects its performance.
- 11) Minimum switching load is the lower limit switching current under the micro-load. When the relay is used below minimum switching load, reliability becomes lower. Please use the relay beyond minimum switching load. Additionally, minimum switching load is changed by coil drive circuit, type of load, switching frequency and environment condition. So please confirm the reliability with actual load under the assumed actual environment.
- 13) The relay should not be installed near strong magnetic fields (transformers, magnets, etc.) and should not be installed near heat source.
- 14) If the several relays are mounted closely or a heatgeneration object is close to the relay, it may cause troubles the abnormal temperature-rise and the short insulation distance terminals outside of the relay so please assure the evaluation of the relay under the actual worst condition.
- 15) The relay contacts are encapsulated in an inert gas atmosphere. So, please avoid using or storing beyond the allowable ambient temperature range.
- 16) After that the relay has been applied with the rated voltage and current to the coil continuously and then the relay is once switched off and switched on immediately, the relay coil resistance may be increased due to the coil temperature increase.
- This will result in higher operate voltage and the value will surpass the rated operate voltage value. In order to avoid this failure, the following countermeasures are recommended.
- decrease of the load current
- restriction of time to apply voltage
- restriction of operating ambient temperature, etc.
- 17) If an inductive load (L/R > 1ms) is applied, add surge protection in parallel with the inductive load. If this is not done, the electrical life will be shortened and cut-off failure may occur.
- 18) In case using a capacitive load (C-load), please take a countermeasure as pre-charging to the capacitive load so that the inrush current will not surpass 140A. The relay may have a contact welding without such countermeasure.
- 19) Use the suitable wire or bus bar according to the current. If the wire diameter is thin, maximum allowable contact current cannot be assured.
- 20) Take care to disconnect from the power supply when wiring.
- 21) The relay satisfies water resistance level of JIS D 0203 R2. Please take any countermeasures additionally if it is installed in the place where higher water resistance level is required.
- 22) Do not use this product in such atmosphere where any kind of organic solvent (as benzene, thinner and alcohol) and the strong alkali (as ammonia and caustic soda) may be adhered to this product.
- 23) Be careful that oils and foreign matter do not stick to the main terminal part because it is likely to cause a terminal part to give off unusual heat.
- 24) Do not make additional manufacturing upon the relay housing.
- 25) Maximum overcurrent value in this specification is limited as single operation only. In the case of multiple operation, this relay may cause malfunction by heating. So, please confirm the temperature / operation using your application.
- In the case of multiple operation, please stop applying the over current to secure the relay’s temperature under the maximum ambient temperature.
- 26) When applying current which includes precipitous changes or ripple, the relay may generate buzzing sound. Therefore, please confirm with the actual load.
- 12) As for the screws of fixing relay-body and screws of fixing contact terminal, the tightening torque must be within the specified range.
- The purpose of the tightening torque for the contact terminal is to secure adhesion force (axial force) at the fixing part and provide stable electrical connection. Therefore, do not use the screws (bolts and nuts) which require rotation torque of locking type (prevailing torque type) because sufficient adhesion force (axial force) may not be secured.
- In addition, if the locking type nut is used, an excessive torque may be applied to the case before generating of axial force and may cause breakage of the case.
- Regarding the screw for fixing relay body, please use suitable screws after adequate verification at user’s side.
Panasonic Corporation Electromechanical Control Business Division industrial.panasonic.com/ac/e/
ASCTB418E 201904
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> c Panasonic Corporation 2019
Please contact ..........
## Panasonic Corporation
Electromechanical Control Business Division 1006, Oaza kadoma, kadoma-shi, Osaka 571-8506, japan industral.panasonic.com/ac/e/
© Panasonic Corporation 2019
ASCTB418E-1 201904
Specifications are subject to change without notice.
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- [Supplier page](https://es.farnell.com/panasonic/aeva1251/automotive-relay-spst-no-12vdc/dp/4203958)
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