DC-AC SSR
DENKI SEIGYO – DSR1-_A-DA Single Phase (DC-AC) Solid State Relay
Category: Solid State Relay / DC-AC SSR
Manufacturer: Denki Seigyo
Product Overview
The Denki Seigyo DSR1-_A-DA is a DC-controlled AC solid state relay (SSR) designed for precise, contactless switching of AC loads in automation and industrial control systems.
Featuring a DC input control circuit and AC output triac or SCR stage, it ensures fast, silent, and reliable switching with no mechanical wear.
This compact, durable SSR offers zero-cross or random-turn-on control options, making it ideal for resistive, inductive, and motor loads in process automation, power control, and HVAC systems.
Key Characteristics
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DC input control with AC output – ideal for PLC and automation systems
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Zero-cross and random-turn-on models for different load types
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Silent operation with no contact bounce or arc
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High dielectric strength and isolation reliability
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LED indicator for ON-state monitoring
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Compact and maintenance-free design
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Low power consumption and minimal heat generation
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Long operational life with high surge immunity
Versatile and Reliable Industrial SSR
The DSR1-_A-DA provides fast, reliable, and contactless AC load switching using DC control signals.
Its wide input range (3–32 VDC) and high output voltage capacity (24–480 VAC) make it highly adaptable for industrial, process, and automation systems.
With built-in optical isolation, it ensures superior electrical safety, noise immunity, and long-term performance even in harsh industrial conditions.
DC-AC SSR
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | DSR1-_A-DA |
| Type | Single Phase Solid State Relay (DC-AC) |
| Manufacturer | Denki Seigyo |
| Control Type | DC Input / AC Output |
| Input Control Voltage | 3–32 VDC |
| Input Current | ≤ 15 mA (typical) |
| Output Load Voltage | 24–480 VAC (AC-AC) |
| Rated Load Current | 10 A / 25 A / 40 A / 60 A / 80 A / 100 A |
| Frequency Range | 47–63 Hz |
| Turn-on Type | Zero-cross / Random-turn-on (model dependent) |
| Turn-on Time | ≤ 10 ms (Zero-cross type) |
| Turn-off Time | ≤ 10 ms |
| ON-State Voltage Drop | ≤ 1.6 V (at rated load) |
| OFF-State Leakage | ≤ 10 mA |
| Dielectric Strength | 2500 VAC (Input–Output, 1 min) |
| Insulation Resistance | ≥ 100 MΩ (at 500 VDC) |
| Surge Current (10 ms) | 10× rated current |
| Cooling Method | Natural convection / Forced cooling for high load |
| LED Indicator | Built-in (Input ON indication) |
| Mounting Method | Panel / Heat sink mount |
| 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. 62 × 45 × 24 mm (varies by rating) |
| Weight | Approx. 150–250 g (depending on model) |
| Compliance | CE, RoHS |
Key Features
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High-speed, silent switching with DC control
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Zero-cross or random-on options for flexible use
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Integrated LED indicator for status monitoring
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High isolation between input and output
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No contact wear or arcing — long life operation
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Compact, rugged, and vibration-resistant housing
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Energy-efficient with low power dissipation
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Easy installation via screw terminals and heat sink mounting
Applications
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Industrial automation systems
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Process and machine control panels
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HVAC, heating, and temperature control systems
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Motor and pump switching
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Lighting and power distribution systems
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PLC interface and load control
Ordering Information
| Model | Input Voltage | Output Voltage | Load Current | Control Type | Indicator |
|---|---|---|---|---|---|
| DSR1-10A-DA | 3–32 VDC | 24–480 VAC | 10 A | Zero-cross | LED |
| DSR1-25A-DA | 3–32 VDC | 24–480 VAC | 25 A | Zero-cross | LED |
| DSR1-40A-DA | 3–32 VDC | 24–480 VAC | 40 A | Zero-cross | LED |
| DSR1-60A-DA | 3–32 VDC | 24–480 VAC | 60 A | Random-on | LED |
| DSR1-80A-DA | 3–32 VDC | 24–480 VAC | 80 A | Random-on | LED |
| DSR1-100A-DA | 3–32 VDC | 24–480 VAC | 100 A | Zero-cross | LED |
Product Summary
The Denki Seigyo DSR1-_A-DA Single Phase DC-AC Solid State Relay combines high-speed switching, noise-free performance, and long-term reliability for industrial AC load control using DC signals.
Engineered for resistive, inductive, and motor loads, it offers superior electrical isolation, thermal stability, and safety.
With CE and RoHS certification, the DSR1-_A-DA delivers durable, maintenance-free operation, making it a trusted choice for automation and power control systems.
Wiring Diagram
