Auto Relays 14VDC 40A General Mini Automotive Power Relay PCB Wlf28 for Car Fuel Pump /AC Compression Clutch / Car Speaker / Car Light / Car Intelligence

We are moving towards the corporate goals of professionalization, modernization and internationalization. Our company will make every effort to develop the 10 ampere power relay, five ampere sensitive signal relay, 10a 12v Relay industry with strict management, advanced technology, reliable quality and considerate service. We do our best to improve the five aspects of "quality, price, delivery, service and growth". In order to adapt to the new normal of market economy, our company has continuously strengthened strategic planning and forward-looking deployment, and made every effort to create new growth points.

1 Product Introduction of 40 ampere clutch relay

Product feature:

◆ Small size, heavy contact load, capable of standing strong current of 40A at 14VDC.

◆ PC board mounting.

◆ Suitable for automatic control facilities and automobile application etc.

◆ Both European 11mm pole distance and American 8mm pole distance available.

◆ It automotive flasher relay

Definition for this relay.

Name rule :

BM940 - A - S

1             2   3

1 Model No.

2 Contact Form: A:1A;B:1B;C:1C

3 Package: S-Sealed None--Flux tight type

2 Figure sheet of 40 ampere clutch relay

Contact Rating
Contact Form			1A(1H) (SPSTNO),1B(1D) (SPSTNC),1C(1Z) (SPDT(B-M))
Contact Material			AgSnO2
Contact Load Capacity			1A: 40A/14VDC; 1B: 30A/14VDC; 1C NO: 40A/14VDC, NC: 30A/14VDC
Switching Power Max.			560W 2400VA
Switching Voltage Max.			75VDC 380VAC	Switching Current Max.:	40A
Contact Resistance Max.			≤30mΩ		IEC 61810-7
Life expectancy	Electrical		10 5		IEC 61810-7
	Machanical		10 7		IEC 61810-7

Coil Rating
No.	Coil Voltage(VDC)		Coil Resistance Ω±10%	Pick up (VDC) Max. (70% of Rated Voltage)	Drop out (VDC) Min.(10% of Rated Voltage)	Power (W)	Operate Time (ms)	Release Time (ms)
	Rated	Max.
1	6	7.8	19	4.2	0.6	1.9	≤5	≤3
2	9	11.7	42.6	6.3	0.9
3	12	15.6	90	8.4	1.2	1.6
4	18	23.4	202.5	12.6	1.8
5	24	31.2	360	16.8	2.4

Technical Rating
Insulation Resistance	Min.100MΩ(500VDC)	IEC 60255-5
Dielectric Strength Between Contacts	50Hz 500V	IEC 60255-5
Dielectric Strength Between Coil&Contact	50Hz 750V	IEC 60255-5
Shock Resistance	200m/s 2 11ms	IEC 68-2-27 test Ea
Vibration Resistance	10Hz～40Hz, double amplitude 1.27mm	IEC 68-2-6 test Fc
Leading-out Terminal Strength	10N	IEC 68-2-21 test Ua1
Weldability	235℃±2℃ 3s±0.5s	IEC 68-2-20 test Ta way1
Ambient Temperature	﹣40℃～125℃
Relative Humidity	85%(40℃)	IEC 68-2-3 test Ca
Weight	Approx. 19g,Open type:21g

3 Size and circuit of 40 ampere clutch relay

Outline Dimensions

Bottom View PCB Layout

Wiring Diagram ( Bottom View)

Engineering Data

4.Frequently Asked Question

Q:How many square meters of your factory?

A: More than 3000 square meter.

Q:What main software are you using in your product drawing?

A: We use the most advanced industry designing and developing software, like PRO/E CREO

Relying on a good professional background and rich experience in the Auto Relays 14VDC 40A General Mini Automotive Power Relay PCB Wlf28 for Car Fuel Pump /AC Compression Clutch / Car Speaker / Car Light / Car Intelligence industry, our company has cultivated a professional technical team and established a complete quality control system to ensure that the product quality is always at the international level. We attach importance to the cultivation of professional and technical talents, and optimize corporate governance to make our corporate development more stable. Product specialization and industrial scale are the basic features and development focus of our company.

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