CKRA4820-10 Crydom - Relays

CKRA4820-10 Description

The Crydom CKRA4820-10 is a solid state relay, rated for 480 V and 20 A. 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 CKRA4820-10 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 CKRA4820-10 is a 20 A slim DIN-rail solid state relay (CKR48 Series, 22.5 mm wide, 48-530 VAC), SCR output, AC control (90-280 Vrms), random turn-on, LED input indicator. Source: Crydom CKR48 Series datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-63 Hz)	48-530 Vrms
Maximum load current	20 Arms
Transient overvoltage	1200 Vpk
Minimum load current	0.15 Arms
Maximum surge current (16.6 ms)	250 Apk
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
Maximum I²t for fusing (8.3 ms)	260 A²s
Switching type	random turn-on
Input
Control voltage range	90-280 Vrms
Turn-on / turn-off voltage	90 Vrms / 10 Vrms
Typical input current	2 mA @ 120 Vrms, 4 mA @ 240 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)	10 oz (280 g)

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