CKRD4820 Crydom - Relays

CKRD4820 Description

The CKRD4820 from Crydom is a solid state relay with a 480 V / 20 A rating. Typical uses include temperature control of heaters, packaging and plastics machinery, and general industrial load switching.

USComponent (Young & New Century LLC) supplies power modules, thyristors, diodes and other industrial components, including legacy parts. Contact us for a quote on the CKRD4820, and please confirm ratings against the datasheet before ordering.

Summary of Features

Target Applications

Crydom CKRD4820 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 CKRD4820 is a 20 A slim DIN-rail solid state relay (CKR48 Series, 22.5 mm wide, 48-530 VAC), SCR output, DC control (4.0-32 VDC), zero-cross 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	zero-cross turn-on
Input
Control voltage range	4.0-32 VDC
Turn-on / turn-off voltage	4.0 VDC / 1.0 VDC
Typical input current	8-12 mA
Maximum turn-on / turn-off time	1/2 cycle / 1/2 cycle
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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