3 PHASE (AC-AC) SSR
DENKI SEIGYO – DSR-3AA-_A Three Phase (AC-AC) Solid State Relay
Category: Solid State Relay / Three-Phase SSR
Manufacturer: Denki Seigyo
Product Overview
The Denki Seigyo DSR-3AA-_A is a three-phase AC-to-AC solid state relay (SSR) designed for high-performance, contactless switching of AC loads in industrial and automation systems.
Engineered for long operational life, fast response, and silent operation, this SSR eliminates mechanical wear, ensuring maintenance-free operation even in harsh industrial environments.
With zero-cross or random-turn-on options, the DSR-3AA-_A provides smooth, reliable control of resistive, inductive, and motor loads across three phases, offering superior efficiency and durability.
Key Characteristics
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Three-phase AC control – ideal for high-power industrial loads
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Contactless switching – no arcing, noise, or mechanical wear
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Fast and silent operation – suitable for frequent switching applications
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High dielectric and surge resistance – built for industrial reliability
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LED input indication – visual ON/OFF status display
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Available in zero-cross or random-turn-on models
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Compact industrial housing – easy to mount on panel or DIN rail with heat sink
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Long service life and low maintenance – no moving contacts
Versatile and Reliable Industrial SSR
The DSR-3AA-_A offers reliable, stable, and high-speed three-phase AC control for automation and power systems.
It is an ideal choice for controlling heaters, motors, lamps, and industrial equipment requiring fast and clean switching.
Strict Denki Seigyo manufacturing standards ensure exceptional quality, performance consistency, and long-term reliability in every application.
3 PHASE (AC-AC) SSR
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | DSR-3AA-_A |
| Type | Three Phase Solid State Relay (AC-AC) |
| Manufacturer | Denki Seigyo |
| Control Type | Zero-cross / Random turn-on (model dependent) |
| Input Control Voltage | 80–250VAC or 3–32VDC (depending on model) |
| Input Current | ≤ 15 mA (typical) |
| Output Load Voltage | 24–480VAC (AC-AC) |
| Rated Load Current | 10A / 25A / 40A / 60A / 80A / 100A |
| Frequency Range | 47–63Hz |
| Turn-on Time | ≤ 10 ms (Zero-cross type) |
| Turn-off Time | ≤ 10 ms |
| ON-State Voltage Drop | ≤ 1.6V (at full load) |
| OFF-State Leakage | ≤ 10 mA |
| Dielectric Strength | 2500VAC (Input–Output) |
| Insulation Resistance | ≥ 100 MΩ at 500VDC |
| Cooling Method | Natural air / Forced cooling (recommended for >40A) |
| LED Indicator | Built-in (Input ON indication) |
| Mounting Method | Panel / Heat sink mounting |
| Ambient Temperature | -25°C to +80°C |
| Storage Temperature | -30°C to +100°C |
| Humidity Range | 45–85% RH (non-condensing) |
| Housing Material | Flame-retardant thermoplastic |
| Dimensions (L × W × H) | Approx. 105 × 75 × 38 mm |
| Weight | Approx. 280 g |
| Compliance | CE, RoHS |
Key Features
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Three-phase AC control for heavy-duty loads
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Zero-cross and random-on models available for versatile applications
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Integrated LED indicator for input signal monitoring
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Low leakage current and high surge immunity
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Compact design with screw terminals for secure wiring
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Long life cycle with no mechanical wear or noise
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Ideal for automation, power distribution, and heating systems
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Maintenance-free operation
Applications
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Industrial heating and furnace control
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Motor and pump control systems
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Three-phase load switching
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Process automation and manufacturing systems
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HVAC and compressor control
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Power distribution and energy systems
Ordering Information
| Model | Input Voltage | Output Voltage | Load Current | Control Type | Indicator |
|---|---|---|---|---|---|
| DSR-3AA-25A | 80–250VAC | 24–480VAC | 25A | Zero-cross | LED |
| DSR-3AA-40A | 80–250VAC | 24–480VAC | 40A | Zero-cross | LED |
| DSR-3AA-60A | 80–250VAC | 24–480VAC | 60A | Zero-cross | LED |
| DSR-3AA-80A | 80–250VAC | 24–480VAC | 80A | Random-on | LED |
| DSR-3AA-100A | 80–250VAC | 24–480VAC | 100A | Random-on | LED |
Product Summary
The Denki Seigyo DSR-3AA-_A Three Phase Solid State Relay is engineered for high-power industrial switching, offering fast response, durability, and silent operation.
With AC input control, high-current capacity, and maintenance-free design, it ensures superior reliability in automation and process control systems.
Ideal for heaters, motors, and three-phase load applications, this SSR is a trusted solution for modern industrial power control with CE and RoHS compliance.
Wiring Diagram
