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      Solid State Relays (SSR) – No-Contact Switching for Industrial Heating & Automation

      High-performance Solid State Relays (SSR) with fully electronic operation and no mechanical contacts — delivering fast, precise, and reliable switching for industrial heating, temperature control, and automation systems. Available in single-phase and three-phase models, with industrial-grade high-current versions designed for heavy-duty load control in demanding production environments.
      High-performance Solid State Relays (SSR) with fully electronic operation and no mechanical contacts — delivering fast, precise, and reliable switching for industrial heating, temperature control, and automation systems. Available in single-phase and three-phase models, with industrial-grade high-current versions designed for heavy-duty load control in demanding production environments.
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      Explore Our Solid State Relays (SSR) Series

      Key Advantages

      • No Arcing or Mechanical Wear – Fully electronic switching with no sparks or contact degradation.
      • Fast, Accurate Control – Precise switching for reliable performance.
      • High Isolation – Safe separation between control and load circuits.
      • Industrial Durability – Shock, vibration, and humidity-resistant.
      • Wide Range – DC-AC, AC-AC, and DC-DC configurations, available in single-phase and three-phase models.
      • No Arcing or Mechanical Wear – Fully electronic switching with no sparks or contact degradation.
      • Fast, Accurate Control – Precise switching for reliable performance.
      • High Isolation – Safe separation between control and load circuits.
      • Industrial Durability – Shock, vibration, and humidity-resistant.
      • Wide Range – DC-AC, AC-AC, and DC-DC configurations, available in single-phase and three-phase models.

      Applications

      • Industrial Heating & Temperature Control
      • Power Supplies & Automation Systems
      • Packaging & Production Line Equipment
      • Thyristor Power Controllers & SCR Firing Circuits
      • Industrial Heating & Temperature Control
      • Power Supplies & Automation Systems
      • Packaging & Production Line Equipment
      • Thyristor Power Controllers & SCR Firing Circuits

      FAQs

      What SSR type should I choose?

      SSRs are categorized by control and load type:

      • DC-AC SSR – DC control signal, AC load (most common for industrial heating)
      • AC-AC SSR – AC control signal, AC load
      • DC-DC SSR – DC control signal, DC load

      By phase:

      • Single-phase SSR – Heaters, temperature control, small industrial equipment
      • Three-phase SSR – Industrial heaters, furnaces, and production line equipment
      • Industrial Grade SSR – High-current applications requiring heavy-duty continuous operation

      How do I select the correct current rating?

      SSR output current should be 3–5× the actual load current to handle heat generation, surge current, and continuous operation.

      • Resistive (heater) loads → ≥ 3× load current
      • Inductive or harsh loads → ≥ 4–5× load current

      Do SSRs need heatsinks?

      Yes, a heatsink is required in the following cases:

      • Output current > 10A
      • Long-time continuous operation
      • Enclosed installation
      • High ambient temperature (> 40°C)

      Fan cooling is recommended for improved reliability in demanding environments.

      Can you provide test reports or certifications?

      Yes. Our products are CE certified and manufactured under ISO 9001 quality management standards. Test reports are available upon request for each batch.

      I'm not sure which SSR fits my application — can you help?

      Absolutely. Tell us your application, control voltage, load type (AC or DC), and current requirements — our engineers will recommend the right SSR type and model for you.

      Can I send you a photo or datasheet of my existing part to find a replacement?

      Yes — just send us a photo, nameplate data, or datasheet via WhatsApp or email. Our engineers will identify the equivalent or compatible SSR replacement for you within 24 hours.

      What is the lead time and MOQ?

      MOQ is typically 1 piece for standard models. Lead time is 3–7 business days for stock items, and 2–4 weeks for custom or large orders. Contact us for specific availability.

      SoftStarterPro

      Founded in 2015, SoftStarterPro provides factory-direct Motor Soft Starters, VFD Drives, SCR Power Controllers, and Power Modules. Expert technical support and OEM/ODM solutions available.

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      WhatsApp: +86 18006697926 · Email: ann@softstarterpro.com · Liushi Town, Yueqing, Wenzhou, Zhejiang, China

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