CMRA2445 Crydom - Relays

CMRA2445 Description

Crydom makes the CMRA2445, a 240 V, 45 A solid state relay. It is widely used for heater control, motor switching, lighting and process equipment where mechanical contacts would wear out.

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Summary of Features

Target Applications

Crydom CMRA2445 is used for switching AC loads in industrial heating and temperature control (ovens, furnaces, plastic molding and extrusion machines), packaging and food processing equipment, lighting control, HVAC systems and industrial automation.

Key Specifications

Crydom CMRA2445 is a 45 A DIN-rail solid state relay with integral heat sink, CMR24 Series (45 mm wide, 24-280 VAC), SCR output, AC control (90-140 Vrms), zero voltage turn-on, LED input indicator. Source: Crydom CMR24 Series datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-63 Hz)	24-280 Vrms
Maximum load current	45 Arms
Transient overvoltage	600 Vpk
Minimum load current	0.15 Arms
Maximum surge current	625 Apk (16.6 ms)
Maximum on-state voltage drop @ rated current	1.6 Vpk
Maximum off-state leakage @ rated voltage	10 mArms
Minimum off-state dv/dt	500 V/µs
Thermal resistance junction to case (Rjc)	0.63 °C/W
Maximum I²t for fusing	1620 A²s (8.3 ms)
Switching type	zero voltage turn-on
Input
Control voltage range	90-140 Vrms
Turn-on / turn-off voltage	90 Vrms / 10 Vrms
Typical input current	15 mA @ 120 Vrms
Maximum turn-on / turn-off time	10 ms / 40 ms
General
Dielectric strength, input/output/base	4000 Vrms
Ambient operating temperature	-40 to 80°C
Weight (typical)	16.8 oz (476 g)

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