CKRA2420P Crydom - Relays

CKRA2420P Description

Rated at 240 V and 20 A, the Crydom CKRA2420P is 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 CKRA2420P 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 CKRA2420P is a 20 A slim DIN-rail solid state relay (CKR24 Series, 22.5 mm wide, 24-280 VAC), SCR output, control 110-280 Vrms, zero voltage turn-on, LED input indicator, with internal overvoltage protection. Source: Crydom CKR24 Series datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-63 Hz)	24-280 Vrms
Maximum load current	20 Arms
Transient overvoltage	600 Vpk
Minimum load current	0.15 Arms
Maximum surge current (16.6 ms)	250 Apk
Maximum I²t for fusing (8.3 ms)	260 A²s
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
Switching type	zero voltage turn-on
Input
Control voltage range	110-280 Vrms (earlier datasheet: 90-280 Vrms)
Turn-on / turn-off voltage	110 / 10 Vrms
Typical input current	5 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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