D4850 Crydom - Relays

D4850 Description

The Crydom D4850 is a solid state relay, rated for 480 V and 50 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 D4850 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 D4850 is a 50 A panel-mount solid state relay, Series 1 480 VAC (48-530 VAC), SCR output, DC control, zero voltage turn-on. Source: Crydom Series 1 480 VAC datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-440 Hz)	48-530 Vrms
Maximum load current	50 Arms
Transient overvoltage	800 Vpk
Minimum load current	150 mArms
Maximum 1-cycle surge current (50/60 Hz)	597/625 Apk
Maximum on-state voltage drop @ rated current	1.15 Vrms
Maximum off-state leakage @ rated voltage	1 mArms
Minimum off-state dv/dt	500 V/µs
Maximum I²t for fusing, 1/2 cycle (50/60 Hz)	1770/1621 A²s
Thermal resistance junction to case (Rjc)	0.45 °C/W
Switching type	zero voltage turn-on
Input
Control voltage range	4-32 VDC
Minimum turn-on voltage	4.0 VDC
Must turn-off voltage	1.0 VDC
Input current	7-12 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)	2.6 oz (74.9 g)

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