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ABB SIR2B20A4 - Solid-State Isolated Relay 90-150V Input

ABB
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ABB SIR2B20A4 is a solid-state isolated overload relay from the SIR Series, designed to provide reliable motor protection and switching control in industrial environments. It accepts a wide input voltage range of 90 to 150 V AC/DC and delivers a 120 V AC output through a single-pole single-throw normally open (SPST NO) contact form, with optical isolation via an LED/photo transistor input for enhanced noise immunity and low power consumption. The relay features a compact surface-mount design secured with one #10 (M5 x 0.8) screw, measures 2 x 2 x 1.51 inches (50.8 x 50.8 x 38.4 mm), and weighs 5 lb, with a dielectric breakdown of at least 2000 V between terminals and mounting surface. It operates across a temperature range of -40°C to 60°C and complies with industry standards for robust performance in demanding conditions. Typical applications include motor control centers, industrial automation systems, and protection circuits requiring reliable solid-state switching.

Key Features & Specifications
  • Type: SIR Series – Solid-State Isolated Relay
  • Input Voltage: 90-150 V AC/DC
  • Output Voltage: 120 V AC
  • Output Form: SPST Normally Open (NO)
  • Mounting Type: Surface mount with one #10 screw
  • Input Type: Optical isolation LED/photo transistor
  • Dielectric Breakdown: ≥2000 V terminals to mounting surface
  • Operating Temperature Range: -40°C to 60°C
  • Output Voltage Drop: Approximately 2.0 V at rated current
  • Power Consumption: ≤0.5 W
  • Dimensions: 2 x 2 x 1.51 inches (50.8 x 50.8 x 38.4 mm)
  • Weight: 5 lb