A1240-10 Crydom - Relays

A1240-10 Description

The A1240-10 from Crydom is a solid state relay. Typical uses include temperature control of heaters, packaging and plastics machinery, and general industrial load switching.

We help engineers and repair technicians find parts like the A1240-10, including obsolete ones. Send a quick RFQ for current pricing and delivery. Before ordering, please confirm ratings and pin-out with the official datasheet.

Summary of Features

Target Applications

Crydom A1240-10 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 A1240-10 is a 40 A panel-mount solid state relay, Series 1 120 VAC (24-140 VAC), SCR output, AC control (90-280 VAC), instantaneous (random) turn-on. Source: Crydom Series 1 120 VAC datasheet. Values at 25°C unless noted.

Parameter	Value
Output
Operating voltage (47-440 Hz)	24-140 Vrms
Maximum load current	40 Arms
Transient overvoltage	600 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)	1770/1629 A²s
Thermal resistance junction to case (Rjc)	0.5 °C/W
Switching type	instantaneous (random) turn-on
Input
Control voltage range	90-280 Vrms
Minimum turn-on voltage	90 Vrms
Must turn-off voltage	10 Vrms
Input current	5-10 mA
Maximum turn-on / turn-off time	20 ms / 30 ms
General
Dielectric strength, input/output/base	4000 Vrms
Ambient operating temperature	-40 to 80°C
Weight (typical)	2.6 oz (74.9 g)

Technical document (PDF)  |  Request a quote for A1240-10 (reply within 24 hours)