Can I test the relay with a multimeter?

The inside is a semiconductor switch showing high-impedance state on multimeter. You must use a dummy load like an incandescent lamp to test continuity.

Is a heat sink required?

Yes, for load current 10A install radiator. For current upwards 40A, add fan for force cooling or water cooling.

Are solar equipment loads recommended?

No, we do not recommend using solid state relays on solar equipment. If tried, buy a relay with 10 times the current, and no return service is provided if it fails.

DC Control AC 220V SSR Relay Plastic Cover Solid State Relay 40A 24V DC

Name: DC Control AC 220V SSR Relay Plastic Cover Solid State Relay 40A 24V DC
Brand: Yueqing Chuxi Electric Co., Ltd.
SKU: 2258576795

Zhejiang, ChinaYueqing Chuxi Electric Co., Ltd.

US$2.90

10-99 Pieces

US$2.70

100-299 Pieces

US$2.35

300+ Pieces

Product profile

Customization

Available

Theory

Solid State Relay

Usage

Household Appliances Relay

Model NO.

SSR-40DA

Phase

Electricity Type

Number of Pole

Load

Medium Power Relay

Protective Characteristics

Enclosed Relay

Action Principle

Electromagnetic Type

Size

Subminiature

Type

Non-Electric Parameter Relay

OEM

Yes

Certificate

Output Voltage

90-480VAC

Control Voltage

3-32VDC

Current

40A

Shell

White

Diameter

57*44*30.5mm

Indicator

LED

Transport Package

Normally Export Packing

Specification

CE.

Trademark

CHUX

Origin

China

HS Code

8536419000

Production Capacity

100000PCS / Month

Key features

2-Year Warranty Coverage: Comprehensive 2-year warranty for all sold products covering mechanical defects.

OEM and ODM Services: Accepts customized products from samples, designs, full customization, and minor adjustments.

LED Indicator System: Features LED indicator for both function status and alarm conditions.

Light Isolation Protection: Input and output loops are fully light isolated for enhanced safety.

Zero Current Turn-Off: Ensures safe switching with zero current turn-off capability.

Universal Fit Design: Compact subminiature size designed for universal installation in appliances.

Fast Sample Delivery: Samples under 100pcs delivered within 4 days.

High Dielectric Strength: Provides 2500VAC dielectric strength for reliable insulation.

Company profile

High Repeat Buyers ChoiceSelf-brandedExhibition Experience

Yueqing Chuxi Electric Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 8 Years CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤7.00h

AI-Powered supplier vetting

SummaryYueqing Chuxi Electric Co., Ltd. is a China-based limited trading company established in 2016, with three employees and products including sensors, switching power supplies, float switches, and solid-state relays. It reports OEM service for well-known brands, ODM availability, and broad customization services. However, no supplier-management-system certification is reported, no new products were launched during the past year, and no SDK is available. Service-management procedures, complaint-handling procedures, corrective and preventive action records, and raw-material traceability are not documented or are unknown. The supplier has substantial export activity, but no valid import/export license is reported and exports may be conducted through agents. Financial evidence is limited to referenced years without disclosed financial figures. The available information supports customization and reported OEM/ODM capability, while production scale, after-sales controls, financial credibility, and customer-case...

CertificationsNo supplier-management-system certification is reported. An SGS audit is documented with a report period from September 24, 2024 to September 23, 2025, but the recorded audit result is 0 and no specific certification or favorable evaluation is provided.

After-Sales capabilityThe supplier lists 10 qualified service suppliers and provides some supplier names, but it has no written procedures or records for service-capability assessment, corrective and preventive actions, or effective customer-complaint handling. This explicitly indicates deficiencies in documented after-sales management controls.

R&D capabilityThe supplier reports one year of total R&D-engineer experience, no new products during the past year, and no available SDK. Although ODM service and multiple customization options are offered, the stated lack of recent product development and SDK support does not demonstrate strong independent innovation.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM availability, providing direct evidence of broad stated customization services.