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High-performance switches and relays in compact designs

Units are becoming smaller and lighter even as makers enhance functionality.

China suppliers of relays and other switches are rolling out smarter, high-capacity solutions in line with the trend for increased automation in vehicles. Such models are typically designed for lighting, wiper, security, safety and diagnostic systems.


Automotive switch

Aopec offers VSRs with a continuous current of 100 or 140A.

In combination switches, the selection now includes a number of designs that support controls for automatically turning headlights on and off depending on ambient lighting conditions. These enable front illumination systems to activate instantly at nighttime and under poor weather conditions.

Several companies have also introduced units that work with sensors to stop windows from rising when an obstruction is detected. Such products help prevent hands and other body parts from being caught in the window’s path and injured.

Meanwhile, relay manufacturers are developing more voltage-sensitive versions for recreational vehicles. VSRs enable automatic charging of the starting and house batteries simultaneously when the cut-in voltage of the former reaches a specific level.

When the voltage drops to a certain point, these devices disconnect the two power sources.

Aopec Automotive Electronics Co. Ltd is among the companies already offering VSRs. Its selection includes units with a cut-in voltage of 13.3 or 25.6V and cut-out voltage of 12.8 or 25.6V.

To support the power requirements of the electronic systems now being fitted into cars and other vehicles, suppliers are releasing more switches with voltage ratings higher than 24V. These products currently account for more than 50 percent of existing designs.

Amid efforts to enhance performance, size remains a key consideration in R&D. Keeping constructions compact allows a greater number of switches to be fitted into a vehicle should it be needed. Weight is also a concern given fuel efficiency concerns.

Combination types as small as 14.3x7.5x13.8mm, for example, are now available. Versions as light as 15g are offered, while single relays come in 4g constructions.

At several enterprises, visual appeal is also factored into product development. This has yielded units in various hues to match or complement vehicle interiors. Besides black and white, choices now include red, blue and green. Transparent housings in certain shades are also an option.

Some manufacturers have redesigned the structure of their aftermarket models to fit seamlessly into the car.

Releases in coming months will continue to target North America and the EU. A number of companies are also looking into business opportunities in the Middle East, South America and Asia.

Products & prices

China’s selection of automotive switches includes open, sealed and flux-resistant constructions. Designs in rectangular and round housings are available, the latter having emerged together with the release of the Volkswagen Santana 2000.

Models have up to six contact points made of silver alloy or another metal. For the housing or insulating material, black nylon 6 and 66 top raw material options. White nylon is also popular, usually featuring anti-reflective coating. LED indicators are integrated into several designs for visibility.

Units can typically be used for up to 50,000 on/off cycles. Some releases, however, can last 50,000 operations.

For relays, the range in China comprises single and combination types. Open-vent or through-hole versions are common.

The maximum continuous current of units reaches 30A, while coil wire insulation is up to class H or 180 C. Ambient temperature ranges from -40 to 125 C.

Products conform to various standards, including C/FMVSS 302, RoHS, ELV, UL, TÜV, CSA and CQC.

Prices of China-made switches start at $0.50. Quotes for water-resistant properties begin at $3, while VSRs are at least $10 each.


Product gallery



Automotive switch

Product gallery

Aopec Automotive Electronics Co. Ltd

Model: R12140A
MOQ: 300 units
Delivery: 30 days
Description: Voltage-sensitive relay; 12/24VDC rated, 13.7/27.4V cut-in, 12.8/25.6V cut-out voltage; 170/140A intermittent, 140/100A continuous current


Automotive switch

Aopec Automotive Electronics Co. Ltd

Model: R12140B
MOQ: 300 units
Delivery: 30 days
Description: Relay; 12/24VDC rated, 13.3/26.6V cut-in, 12.8/25.6V cut-out voltage; 170/140A intermittent, 140/100A continuous current


Automotive switch

Aopec Automotive Electronics Co. Ltd

Model: R12300A
MOQ: 300 units
Delivery: 30 days
Description: Voltage-sensitive relay; 12/24VDC rated, 13.3/26.6V cut-in, 12.8/25.6V cut-out voltage; 350/250A intermittent, 300/200A continuous current


Automotive switch

Dongguan New Top Auto Parts Co. Ltd

Model: NT-P-2015
MOQ: 500 units
Delivery: 15 days
Description: Fog lamp switch; ABS; 12V; with wiring harness; 52.1mm height; for Toyota Yaris, Camry, Corolla and Vios cars


Automotive switch

Dongguan New Top Auto Parts Co. Ltd

Model: NT-P-2060
MOQ: 500 units
Delivery: 15 days
Description: Fog lamp switch; ABS; 12V; 72.44mm height; 50,000 to 100,000 key presses; for Toyota Yaris, Camry and Vios cars


Automotive switch

Dongguan New Top Auto Parts Co. Ltd

Model: NT-P-2062
MOQ: 500 units
Delivery: 15 days
Description: Defrost switch; ABS; 12V; 40.13mm height; for Malaysia-made cars


Automotive switch

Ningbo Helishun Electron Co. Ltd

Model: 4117
MOQ: 300 units
Delivery: 30 days
Description: Relay; silver alloy contact; 1A, 1B, 1C, 1U, 1V or 1W contact arrangement, 15A/14VDC rating; 75VDC maximum switching voltage; 20A maximum switching current; 400W maximum switching power; -40 to 85 C operating temperature; 100,000 mechanical, 10 million electrical operations; UL, CE, CQC


Automotive switch

Ningbo Helishun Electron Co. Ltd

Model: T78
MOQ: 300 units
Delivery: 30 days
Description: Relay; silver alloy contact; 1A, 1B or 1C contact arrangement, 20A/14VDC or 10A/120VAC rating; 16VDC or 120VAC maximum switching voltage; 25A maximum switching current; 400W maximum switching power; -40 to 85 C operating temperature; 100,000 mechanical, 10 million electrical operations; 6g; UL, CE, CQC

 


Note: This article "High-performance switches & relays in compact designs" was originally published by Global Sources, a leading business-to-business media company and a primary facilitator of trade with China manufacturers and India suppliers, providing essential sourcing information to volume buyers through our e-magazines, trade shows and industry research.

All price quotes in this report are in US dollars unless otherwise specified. FOB prices were provided by the companies interviewed only as reference prices at the time of interview and may have changed.

Disclaimer: All product images are provided by the companies interviewed and are for reference purposes only. Those product images featuring products with trademarks, brand names or logos are not intended for sale. We, our affiliates, and our affiliates' respective directors, officers, employees, representatives, agents or contractors, do not accept and will not have any responsibility or liability for product images (or any part thereof) which infringe on any intellectual property or other rights of a third party.

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