FOTEK HPR-80DA 80A Solid State Relay – DC/AC SSR Module

FOTEK HPR-80DA Solid State Relay (80A DC/AC)

The FOTEK HPR-80DA Solid State Relay is a high-performance, contactless switching component designed for industrial and DIY automation applications. With an 80-amp load capacity and DC input / AC output configuration, this SSR delivers fast, silent, and spark-free switching — making it an ideal replacement or upgrade for mechanical relays in temperature controllers, heaters, motors, and other high-current equipment.

Key Features

• High Current Capacity: Rated at 80A, suitable for demanding industrial control circuits
• DC Input / AC Output (HPR-80DA): Compatible with standard PLC, microcontroller, and temperature controller outputs
• Solid State Design: No moving parts — silent operation, extended service life, and arc-free switching
• Fast Switching: Near-instantaneous response for precise process control
• Durable Construction: Robust plastic housing for reliable performance in workshop and industrial environments
• Easy Mounting: Standard DIN rail or panel mount compatible

Specifications

Common Applications

• Industrial heater and temperature control systems
• CNC machines and 3D printer heated beds
• Motor control and automation panels
• PLC output expansion and relay replacement

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Helpful External Resource

For guidance on electrical safety standards when working with high-current switching devices, visit the OSHA Electrical Safety resource page.

Frequently Asked Questions

Q: What does the "DA" in HPR-80DA stand for, and what does it mean for wiring?

A: The "DA" designation means DC input controlling an AC output. Your control signal (e.g., from a PLC or microcontroller, typically 3–32V DC) connects to the input side, while the high-voltage AC load (e.g., heater or motor) connects to the output side. Always consult your equipment's wiring diagram before installation.

Q: Does this FOTEK HPR-80DA Solid State Relay require a heat sink?

A: Yes. At higher load currents, solid state relays generate heat. It is strongly recommended to mount the HPR-80DA on an appropriately rated aluminum heat sink to ensure stable operation and maximum component longevity.

Q: Is the FOTEK HPR-80DA compatible with standard temperature controllers?

A: Yes. The DC input on the HPR-80DA is compatible with most standard temperature controllers (such as REX-C100, PID controllers, and similar units) that provide a DC SSR-drive output signal.