CKRA4820P Crydom - Relays

CKRA4820P Description

Crydom makes the CKRA4820P, a 480 V, 20 A solid state relay. It is widely used for heater control, motor switching, lighting and process equipment where mechanical contacts would wear out.

USComponent has sourced power semiconductors for maintenance teams and OEMs since 2001. For price and availability of the CKRA4820P, send us a request for quote. Please confirm the specifications against the manufacturer's datasheet before purchase.

Summary of Features

Target Applications

Crydom CKRA4820P 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 CKRA4820P 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), zero-cross turn-on, LED input indicator, with internal overvoltage protection. 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	zero-cross 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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