Solid State Relay SSR-DA 10A 25A 40A DC to AC 24–380V
Solid State Relay SSR-DA 10A 25A 40A DC to AC 24–380V
Solid State Relay SSR-DA Series — Reliable DC-to-AC Switching
Upgrade your electrical control systems with this high-performance Solid State Relay (SSR-DA Series). Available in multiple current ratings — 10A, 25A, 40A, 60A, 80A, and 100A — this sealed SSR provides smooth, silent, and spark-free switching from a low-voltage DC control signal to a high-voltage AC load. Ideal for industrial automation, temperature controllers, heating systems, and DIY electronics projects.
Key Features
- Wide Input Voltage Range: 3–32V DC control signal
- AC Load Voltage: 24–380V AC output — suitable for most global mains voltages
- Multiple Current Ratings: 10A, 25A, 40A, 60A, 80A, 100A to suit your application
- Low Control Current: <25mA — compatible with microcontrollers, PLCs, and logic circuits
- Fast Switching: On/off time ≤10ms for responsive control
- Low On-State Voltage Drop: ≤1.5V for minimal heat generation
- Low Leakage Current: ≤2mA off-state leakage
- LED Status Indicator: Visual confirmation of relay activation
- Sealed & Compact Design: Fully sealed housing (67.5 × 50.3 × 28mm) with bolted fixing for secure panel mounting
- General Purpose: Suitable for a wide range of AC load switching applications
Specifications
| Models Available | SSR-10DA, SSR-25DA, SSR-40DA, SSR-60DA, SSR-80DA, SSR-100DA |
| Control Mode | DC Control AC (DC-AC) |
| Input Voltage | 3–32V DC |
| Load Voltage | 24–380V AC |
| Output Current | 10A / 25A / 40A / 60A / 80A / 100A |
| Control Current | <25mA |
| On-State Voltage Drop | ≤1.5V |
| Switching Time | ≤10ms |
| Off Leakage Current | ≤2mA |
| Status Indicator | LED |
| Mounting | Bolted |
| Dimensions | 67.5 × 50.3 × 28mm |
| Power Source | DC |
| Country of Origin | Made in China |
Who Is This For?
This SSR is perfect for electronics hobbyists, engineers, and automation professionals who need a compact, efficient, and dependable switching component. Whether you're building a PID temperature controller, automating industrial machinery, or adding smart switching to a DIY project, the SSR-DA series delivers consistent performance.
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Frequently Asked Questions
Q: What is a solid state relay (SSR) and how does it work?
A: A solid state relay (SSR) is an electronic switching device that uses semiconductor components — rather than mechanical contacts — to switch an AC load on and off using a low-power DC control signal. The SSR-DA series accepts a 3–32V DC input and switches AC loads from 24–380V, making it silent, spark-free, and highly durable compared to traditional mechanical relays.
Q: Which current rating SSR-DA model should I choose?
A: Choose a model rated at least 1.5–2× your expected load current for reliable long-term operation. For example, if your AC load draws 15A, the SSR-25DA (25A rating) is a safe choice. Available ratings are 10A, 25A, 40A, 60A, 80A, and 100A to cover a wide range of applications.
Q: Is this SSR compatible with Arduino, Raspberry Pi, or PLCs?
A: Yes. The SSR-DA series requires a control current of less than 25mA at 3–32V DC, which is well within the output capabilities of microcontrollers like Arduino and Raspberry Pi GPIO pins, as well as most PLCs and logic controllers. No additional driver circuit is typically needed.
Q: How should the SSR be mounted for best performance?
A: The SSR is designed for bolted panel mounting. For higher current models (40A and above), mounting on an aluminium heat sink is strongly recommended to dissipate heat generated during continuous operation and ensure long-term reliability.