Best Solid State Time-Delay Relays for Automation Projects
Solid state time-delay relays (TDRs) offer precise on/off timing with high reliability for automation, control panels, and hobby projects. They switch outputs without mechanical wear, making them ideal for conveyor belts, lighting sequences, and process timers. This guide highlights five solid state time-delay relays available on Amazon, emphasizing input voltage compatibility, timing ranges, and contact configurations. Each product includes key specs drawn from the manufacturer listing to help you compare quickly and choose confidently for your specific application.
Summary of chosen products:
| Product | Input Voltage | Timing Range | Contact Type | |
|---|---|---|---|---|
| Baomain AC 110V AH3-3 Time Delay Relay | AC 110V | 60 seconds | 5A 250VAC, Ohmic load | 8 pins |
| uxcell AC 110V H3Y-2 Time Delay Relay | AC 110V | 0-60 seconds | DPDT, 5A 250VAC | 8 pins |
| Baomain DC 24V H3Y-2 Time Delay Relay | DC 24V | 30 seconds | DPDT, 5A 250VAC | 8 pins |
| Baomain AC 220V H3Y-2 Time Delay Relay | AC 220V | 5 seconds | DPDT, 5A 250VAC | 8 pins |
| Baomain AC 220V AH3-3 Time Delay Relay | AC 220V | 60 minutes | 5A 250VAC, Ohmic load | 8 pins |
Baomain AC 110V AH3-3 Time Delay Relay 60S
Model: AH3-3, Voltage: AC 110V, Timing: 60 seconds. This 8-pin solid state timer supports an Ohmic load up to 5A at 250VAC, designed for quick integration with standard DIN rails or socket mounting. Mechanical life is rated at 10,000 cycles, making it suitable for intermittent automation tasks or lab experiments where repeatable timing is essential.
uxcell AC 110V H3Y-2 Time Delay Relay
Type: H3Y-2, Voltage: AC 110V, Timing: 0-60 seconds. Features DPDT contact configuration with 8 terminals. This unit is designed for resistive loads and can be mounted on a DIN rail. It includes a socket for easy replacement in control panels. Weighs around 69 g and is a compact option for tight spaces in automation projects.
Baomain DC 24V H3Y-2 Time Delay Relay 30S
Type: H3Y-2, Voltage: DC 24V, Timing: 30 seconds. DPDT contact arrangement with 8 terminals. Rated for 5A at 250VAC resistive load. Mounting on a 3.5mm DIN rail; suitable for DC control circuits or microcontroller-driven timing sequences where DC supply is used for the control logic.
Baomain AC 220V H3Y-2 Time Delay Relay
Type: H3Y-2, Voltage: AC 220V, Timing: 5 seconds. DPDT configuration with 8 terminals. Rated for 5A at 250VAC resistive load. Mounts on a DIN rail and is designed for compact installation in control cabinets where a fast, short-duration delay is required for signaling or safety interlocks.
Baomain AC 220V AH3-3 Time Delay Relay 60Min
Time Range: 60 minutes. Input: AC 220V. This AH3-3 model features an 8-pin package, mechanical life around 10,000 cycles, and electrical life around 1,000 cycles. Output is rated for 5A at 250VAC resistive load. Best suited for longer timing sequences in automation tasks such as batch processing or oven timers where extended delays are needed.
Buying Guide
- Voltage compatibility: Match the relay input voltage (AC or DC) to your control circuit. Mixing AC and DC control can damage the device or cause unreliable timing.
- Timing range and precision: Consider whether you need seconds, tens of seconds, or minutes. Some models offer fixed ranges (e.g., 60S) while others provide adjustable spans (0-60S).
- Contact configuration: DPDT relays provide dual circuits and reversing capabilities, while SPDT or simpler contacts may suffice for single-channel tasks. Check current ratings (often 5A at 250VAC for resistive loads).
- Load type: Ensure the relay supports the expected load (resistive vs inductive) and that the electrical life meets your application cycle count.
- DIN rail compatibility and mounting: Most units are designed to snap onto standard DIN rails; verify terminal count and mounting options for your enclosure.
- Reliability and lifecycle: Mechanical and electrical lifespans influence maintenance intervals in production environments. Solid-state designs typically offer longer cycles with no moving parts.
- Safety and certifications: Confirm compliance with local electrical standards and any applicable safety margins for hobby or professional use.
- Replacement and compatibility: If you already use sockets or DIN rails, verify that the new relay will fit the existing hardware to minimize rewiring.
- Wiring simplicity: Look for sockets included with the relay for quick replacement and wiring clarity in control panels.
Choosing the right solid state time-delay relay depends on your control voltage, desired timing window, and load characteristics. For short delays with AC control, models like the 5-second to 60-second H3Y-2 variants provide compact, reliable timing with easy DIN-rail mounting. When DC control is required, the 24V DC H3Y-2 offers a compatible pathway with standard DC supplies and microcontroller interfaces. For longer delays, the AH3-3 options deliver extended timing up to 60 minutes, suitable for process timers and batch operations. Always verify the exact terminal arrangement and load rating prior to procurement to ensure seamless integration.