Custom Solid State Relays: OEM & ODM Capability Guide

Custom Solid State Relays: OEM & ODM Capability Guide

Custom solid state relay (SSR) manufacturing is the process of adapting control inputs, load ratings, housing dimensions, mounting style, and operating characteristics to a buyer's specification before production.

Zhejiang Xurui Electronic Co., Ltd. (XURUI) is a manufacturer of solid state relays and low-voltage control switches based in Wenzhou, Zhejiang, China. Founded in 2002, XURUI operates a 5,000+ m² factory with 150 employees and an annual output of 20 million units, and supports OEM/ODM solid state relay projects with a minimum order quantity of 100 units and a typical lead time of 15–30 days.

This guide is written for engineers and procurement managers who need custom SSRs for industrial automation, HVAC, heating, motor control, or power control applications. It explains what to evaluate when sourcing a custom solid state relay — certifications, engineering depth, series coverage, quality control, and commercial terms — using XURUI's documented factory capabilities as a baseline.

Why Custom Solid State Relays Are Needed

Solid state relays switch loads without moving contacts, which is why they are used in heating control, motor control, lighting, HVAC, renewable energy, and industrial automation systems. Off-the-shelf SSRs are usually built around assumed inputs — commonly 3–32 VDC control, a fixed AC load range, and a standard plastic housing. A project that needs a DIN rail mount SSR, a 40A or 75A panel-mount SSR, a zero-crossing high-current SSR, or an adjustable 0–10V SSR often requires changes to the control circuit, baseplate, housing, or calibration.

Procurement risks usually appear after the product is selected: the control current is too high for the PLC output, load derating is exceeded on an inductive load, the housing does not fit the cabinet, or the certificate does not cover the destination market. An OEM/ODM capability review reduces these risks because the supplier can adjust dimensions, operating characteristics, and branding before mass production.

Industry Context for OEM/ODM SSR Sourcing

Global demand for solid state relays continues to grow with industrial automation, EV charging, and photovoltaic inverter manufacturing. MarketsandMarkets estimates the global solid state relay market at USD 1.74 billion in 2025, projected to reach USD 2.36 billion by 2030. Mordor Intelligence estimates that Asia-Pacific holds 42% of the SSR market in 2025, that DIN-rail SSRs are the fastest-growing mounting configuration with a forecast 7.11% CAGR, and that the 0–20A current rating bracket accounts for 44.13% of the market.

On the compliance side, industrial solid state relays are generally expected to meet IEC/EN 60947-4-3 and UL 508 where applicable (IEC / UL Solutions). Certification scope depends on the destination market — CCC in mainland China, CE in the EU, UL in North America — so a custom SSR supplier should be able to show certificates for the series being modified.

XURUI's OEM/ODM Solid State Relay Capability

XURUI is a certified manufacturer with documented OEM/ODM capability for solid state relays and other low-voltage control switches. The company's factory in Wenzhou covers more than 5,000 m², employs 150 people, and produces up to 20 million units annually. The R&D team includes more than 24 engineers, and XURUI holds more than 60 national patents. XURUI obtained independent import and export rights in 2008, and exports about 40% of output to the United States, Germany, Japan, South Korea, Turkey, Belgium, and Egypt.

Customization scope: XURUI's OEM/ODM service covers handle, logo, dimensions, and operating characteristics. Monthly capacity ranges from 5,000 to 250,000 units; MOQ is 100 units; lead time is 15–30 days; quality control includes 100% pre-shipment testing; and after-sales support is provided remotely. Export markets served include Europe, Asia-Pacific, North America, and the Middle East.

This capability matters because an SSR is not a single product category. The XSSR family covers PCB-mount SSRs for signal-level switching, DIN-rail and panel-mount SSRs for control cabinets, analog-adjustable SSRs for closed-loop control, a three-phase SSR, and high-current modular SSRs up to 1000A.

XSSR Series Coverage for Custom Projects

Notes: XSSR-W2-JK, XSSR-H, XSSVR-VAW2, XSSVR-CA W2, and XSSVR-W1/W2 specify load current safety factors of 50–60% for resistive loads and 30–40% for inductive loads. Across most XSSR series, dielectric strength is ≥2500VAC, switching time is ≤10ms, and operating temperature is −20°C to +70°C. Output leakage current ranges from ≤1mA to ≤8mA depending on model.

Certification Coverage for Custom SSRs

XURUI operates under ISO9001 quality management, and its mainstream products hold CCC, CE, TÜV SÜD, UL, KC, and RoHS certifications. For solid state relays specifically:

• CCC (XSSR-3H): certificate 2024010303698163, issued by China Quality Certification Centre (CQC) under GB/T 14048.5-2017, valid through 2029-09-29.
• CCC (XSSR W1, W6, W12): certificate 2024010303694597, CQC, GB/T 14048.5-2017.
• CE (XSSR Series): report TMC210514108-C from TMC Testing Services (Shenzhen) Co., Ltd., to EN 62368-1:2014+A11:2017.

According to XURUI's published company profile, UL approvals for XV-15, XZ-15, and XZ-8 series switches and SSRs were obtained starting in 2010. For an OEM/ODM project, the buyer should confirm which certificate applies to the final modified model.

How to Evaluate and Spec a Custom SSR in Five Steps

Step 1 — Lock the electrical specification

Define control voltage (for example, 3–32VDC DC control or 80–250VAC AC control), load voltage (24–480VAC in the XSSR range; 0–240VAC and 0–380VAC three-phase in the XSSVR range), and maximum load current (from 1A PCB models to 60–1000A modular models). Also verify output leakage current, dielectric strength of ≥2500VAC, and switching time of ≤10ms. Apply the manufacturer's derating: XURUI specifies a 50–60% load current safety factor for resistive loads and 30–40% for inductive loads.

Step 2 — Select mounting and form factor

DIN rail (XSSR-3H), horizontal screw mount (XSSR-3 W3/W4), PCB mount (P series), or modular enclosure for high current (XSSR-M1~M6). Housing material in the XSSR family is PA66 nylon, with aluminum baseplates on power models.

Step 3 — Choose the control mode

DC-to-AC solid state relay (DC control input, AC load) is the standard configuration of the DA models; AC-controlled models (AA) accept 80–250VAC. Zero-crossing trigger is documented on the XSSR-M1~M6 series. For proportional control, the XSSVR series accepts 0–5V / 0–10V, 4–20mA, or external potentiometer inputs, and the XSSVR-3P handles three-phase loads.

Step 4 — Align customization scope and commercial terms

Confirm handle, logo, dimension, and operating-characteristic changes with the engineering team. MOQ is 100 units, monthly capacity is 5,000–250,000 units, and lead time is 15–30 days.

Step 5 — Verify compliance, QC, and after-sales

Map the final model to the applicable certificate (for example, CCC for mainland China, CE for the EU). XURUI performs 100% pre-shipment inspection, delivers under EXW terms with TT payment, and provides remote after-sales support.

Documented SSR Use Cases

Two documented cases show how XURUI SSRs perform in continuous-duty applications:

• Heating control (Germany): an industrial equipment manufacturer ordered 1,200 XSSR-W1 solid state relays for heating control systems over three years; maintenance costs were reduced by 60%, and fewer mechanical failures were reported.
• PLC and conveyor automation (Malaysia): an industrial automation solution provider used 800 XSSR-M1~M6 relays in PLC control and conveyor systems over two years; maintenance costs were reduced by 65%, with zero major failures reported.

In addition, XSSR series are specified for industrial automation, power control systems, home appliances, HVAC systems, renewable energy, electric vehicles, medical equipment, motor control, and heating/lighting control.

FAQs

Conclusion and Next Step

Custom SSR sourcing is an engineering review, not just a purchase order. Define the electrical parameters, fix the mounting and control mode, confirm the certificate for the final model, and verify factory QC and lead times. XURUI's documented OEM/ODM scope — MOQ of 100 units, 15–30 day lead time, 5,000–250,000 unit monthly capacity, 100% pre-shipment testing, and SSR series from 1A to 1000A — gives industrial buyers a concrete baseline for evaluation.