Three-Phase Solid State Relay SSR 10A–200A | DC AC Control
Three-Phase Solid State Relay SSR 10A–200A | DC AC Control
Three-Phase Solid State Relay (SSR) — 10A to 200A | Model SSR-3
Upgrade your industrial or automation control systems with this versatile Three-Phase Solid State Relay (SSR). Available in current ratings from 10A to 200A, this SSR supports both DC-to-AC and AC-to-AC control modes, making it an ideal switching solution for motors, heaters, lighting systems, and general-purpose industrial equipment.
⚠️ Important: This relay must be used in conjunction with a compatible heat sink / radiator to ensure safe and reliable operation.
Key Specifications
- Type: Three-Phase Solid State Relay
- Model: SSR-3
- Output Current Range: 10A, 25A, 40A, 60A, 80A, 100A, 120A, 150A, 200A
- Control Voltage: 3–32V DC
- Control Mode: DC Control AC / AC Control AC
- Load Voltage: 24–480V AC
- High-Concern Chemicals: None
- Country of Origin: Made in Mainland China
Why Choose a Solid State Relay?
- ✅ No moving parts — silent operation and longer service life compared to mechanical relays
- ✅ Fast switching — precise, near-instant response for demanding control applications
- ✅ Wide current range — one product line covers light-duty to heavy-duty three-phase loads
- ✅ Dual control modes — supports both DC input (3–32V) and AC input control signals
- ✅ Broad load voltage range — compatible with 24–480V AC industrial systems
- ✅ General purpose design — suitable for automation panels, CNC machines, industrial heaters, and more
Typical Applications
- Industrial heating and temperature control systems
- Three-phase motor control panels
- CNC machine tool switching
- Automation and PLC-driven load switching
- Commercial lighting control
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Frequently Asked Questions
Q: What current ratings are available for this three-phase solid state relay?
A: This SSR-3 series three-phase solid state relay is available in nine current ratings: 10A, 25A, 40A, 60A, 80A, 100A, 120A, 150A, and 200A. Choose the rating that matches your load requirements, always factoring in an appropriate safety margin above your expected operating current.
Q: Does this solid state relay require a heat sink?
A: Yes — a heat sink (radiator) is required for safe operation. Solid state relays generate heat during switching, and without adequate thermal management, the relay may overheat and fail. Always mount the SSR onto a properly rated heat sink and ensure adequate airflow in your enclosure.
Q: Can this SSR be controlled by a PLC or microcontroller output?
A: Yes. The control input voltage range of 3–32V DC is compatible with most PLC digital output cards, Arduino, Raspberry Pi, and similar microcontroller platforms operating at 3.3V or 5V logic, as well as standard 12V and 24V industrial control signals.
Q: What is the difference between DC Control AC and AC Control AC modes?
A: In DC Control AC (DC-AC) mode, a low-voltage DC signal (3–32V DC) switches a high-voltage AC load — this is the most common configuration for PLC and microcontroller-based systems. In AC Control AC (AC-AC) mode, an AC control signal is used to switch the AC load, which suits applications where the control signal is derived from an AC source.