CMRA4845-10 Crydom - Relays

CMRA4845-10 Description

Crydom makes the CMRA4845-10, a 480 V, 45 A solid state relay. Solid state relays like this switch heaters, motors, lamps and other loads quietly and without contact wear.

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Summary of Features

Target Applications

Crydom CMRA4845-10 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 CMRA4845-10 is a 45 A DIN-rail solid state relay with integral heat sink, CMR48 Series (45 mm wide, 48-530 VAC), SCR output, AC control (90-140 Vrms), random turn-on, LED input indicator. Source: Crydom CMR48 Series datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-63 Hz)	48-530 Vrms
Maximum load current	45 Arms
Transient overvoltage	1200 Vpk
Minimum load current	0.15 Arms
Maximum surge current	597/625 Apk (1 cycle, 50/60 Hz)
Maximum on-state voltage drop @ rated current	1.7 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	1779/1621 A²s (1/2 cycle, 50/60 Hz)
Switching type	random 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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