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High reliability remains at the top of solid-state relay R&D agenda

Global SourcesUpdated on 2023/12/01

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China's typical solid-state relays are noise- and contactless models with quick response, low EMI and long operating life.

Makers of solid-state relays in China will continue to have high product reliability as an R&D priority to guarantee consistent performance in various conditions.

One initiative has yielded a patented design for Zhejiang Zenli Rectifier Manufacture Co. Ltd's releases. The supplier's physical enhancements include multilayer sealing for protection against water, dust and corrosion, and a special electroplated plate for enhanced heat dissipation. Inside, copper electrodes are used to allow the components to withstand current surges.

The mainstream selection comes in vertical- and horizontal-mount contactless types with quick response, low EMI, no noise and long operating life. In single- and three-phase variants, the units are widely used in home appliances, computers and peripherals, and industrial control and lighting applications. These have 3 to 14VDC, 3 to 32VDC, 10 to 40VDC or 90 to 280VAC input voltage and operate in -20 to 85 C.

All releases have built-in protection against overcurrent, -voltage, -temperature and short circuits. These meet CE, cUL and RoHS requirements.

The key materials and components used in the manufacture of solid-state relays include optical couplers, transistors, IGBTs, PCBs and cases. The majority of local makers source these locally, using imported versions only as required.

The cost of inputs did not fluctuate much in 2018, but prices dropped by 5 percent due to intense competition. Both are expected to be steady in the next six months.

The products in this gallery have been handpicked by our China-based market analyst for representing current trends in solid-state relays from China makers.

2,500VAC dielectric strength

Wenzhou Chuhan Technology Co. Ltd markets this solid-state relay, SSR-40DA-H model, with 90 to 480VAC operating voltage and 40A current. The component has 3 to 32VDC control voltage and 3 to 25mA control current. Its on-state voltage drop is ≤1.5VAC, while the off-state leakage current is ≤2mA.

The 132g unit has 2,500VAC dielectric strength and 500Mohm insulation resistance at 500VDC. It operates in -30 to 75 C.

Order quantity is negotiable. Delivery takes 7 days.

Inquire Now

40A current rating

This solid-state relay from Wenzhou Chuhan Technology Co. Ltd, SSR-40VA model, operates on 90 to 480VAC and has 40A current rating. The 132g unit has control voltage and current of 3 to 32VDC and 3 to 25mA. Its on-state voltage drop is ≤1.5VAC and the off-state leakage current ≤2mA.

The unit operates in -30 to 75 C, and has 2,500VAC dielectric strength and 500Mohm insulation resistance at 500VDC.

The negotiable minimum order has a 7-day delivery lead time.

Inquire Now

100Mohm insulation resistance

From Zhejiang Xurui Electronic Co. Ltd, the model XSR-DA solid-state relay has 3 to 32VDC or 80 to 250VAC control voltage and 4 to 20mA or 3 to 20mA control current. Its guaranteed closed voltage is 1VDC or 30VAC and guaranteed open voltage 2VDC or 80VAC. Reverse voltage is 32VDC.

The unit has 50 to 60Hz frequency range and 100Mohm insulation resistance.

The negotiable order quantity is delivered within 7 days.

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200A maximum load current

Zhejiang Xurui Electronic Co. Ltd's XSSR-DA48200-1 model is a CE-approved solid-state relay capable of handling 200A maximum load current. It comes in a PBT and PC housing.

The minimum order is negotiable. Delivery lead time is 7 days.

Inquire Now

80A operating current

The model SSR-3P80A solid-state relay from Zhejiang Zenli Rectifier Manufacture Co. Ltd has 24 to 240VAC and 80A operating voltage and current. Its control voltage and current are 3 to 32VDC and 3 to 25mA.

The 450g unit has 2,500VAC dielectric strength and 1,000mohm insulation resistance at 500VDC. It operates in -30 to 80 C.

The order quantity is negotiable. Delivery is within 7 days.

Inquire Now

3,000VAC dielectric strength

Zhejiang Zenli Rectifier Manufacture Co. Ltd's model SSR-40DA solid-state relay operates on 24 to 380VAC, 40A. The control voltage and current are 4 to 32VDC and 3 to 25mA. The 95g component has 3,000VAC dielectric strength and 1,000mohm insulation resistance at 500VDC. It operates in -35 to 85 C.

The minimum order is negotiable. Delivery takes 7 days.

Inquire Now

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