5V 1-Channel Solid State Relay Module (SSR) — High/Low Level Trigger, 250V AC / 2A, for Arduino

5V 1-Channel Solid State Relay Module (SSR) High/Low Level Trigger, 250V AC / 2A, for Arduino

$5.92 USD

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5V 1-Channel Solid State Relay Module (SSR) — High / Low Level Trigger, 250V AC / 2A

This solid state relay (SSR) module uses an optocoupler-isolated triac to switch AC loads up to 250V / 2A silently and without mechanical wear. Controlled by a 5V logic signal from Arduino, Raspberry Pi, or any microcontroller, it supports both high-level and low-level trigger modes. Unlike mechanical relays, SSRs produce no click noise, no contact arcing, and have virtually unlimited switching cycles.

Key Specifications

Parameter	Value
Control Voltage	5V DC (logic input)
Trigger Mode	High level or Low level (selectable)
Load Voltage	Up to 250V AC
Load Current	2A max
Isolation	Optocoupler (input/output isolated)
Switching Type	Zero-crossing (silent, no arcing)
Operating Temperature	-40°C to +85°C
Channels	1

SSR vs Mechanical Relay — Key Differences

Feature	Solid State Relay (SSR)	Mechanical Relay
Noise	Silent	Audible click
Switching Speed	Fast (ms)	Slower (~10ms)
Contact Wear	None (no moving parts)	Yes (limited cycles)
Arcing	None	Yes (at high current)
Best For	Frequent switching, noise-sensitive	High current, low cost

Why Choose This SSR Module?

✅ Silent operation — no click noise, ideal for quiet environments
✅ Optocoupler isolation — protects Arduino from AC mains voltage
✅ High/low trigger selectable — compatible with active-high and active-low GPIO
✅ -40°C to +85°C — reliable in industrial and outdoor environments
✅ No moving parts — virtually unlimited switching cycles