L411F Crydom - Power Transistor Module

L411F Description

The L411F from Crydom is a solid state relay with a 120 V / 20 A rating. Typical uses include temperature control of heaters, packaging and plastics machinery, and general industrial load switching.

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Summary of Features

Target Applications

Crydom L411F is used for AC/DC power conversion and control: controlled rectifiers, DC motor drives, heater and power control, battery chargers and power supplies.

Key Specifications

Crydom L411F is a Series L SCR/diode power module (ceramic base), L4 (20 A), circuit 1, 120 VAC line (400 PIV), with free wheeling diode. Source: Crydom Series L power modules datasheet (scanned). Values at 25°C unless noted.

Parameter	Value
Maximum DC output current (Tc = 85°C, ceramic full bridge)	20 A
Maximum output current (Tc = 85°C, circuit 5)	22 Arms
AC line input voltage	120 VAC (400 PIV)
Circuit	1 (see datasheet diagram)
Maximum SCR voltage drop	2.2 V @ 20 A
Maximum holding current	100 mA
Critical rate of rise of on-state current (Tj = 125°C)	100 A/µs
Critical rate of rise of off-state voltage (Tj = 125°C)	200 V/µs
Maximum non-repetitive surge current	250 A
Maximum I²t for fusing (8.3 ms)	260 A²s
Maximum required gate current / voltage to trigger (25°C)	100 mA / 2.5 V
Maximum peak gate current	3.0 A
Maximum thermal resistance to sink	0.1 °C/W
Typical thermal resistance junction to ceramic base per device	0.5 °C/W
Operating junction temperature	-25 to 125°C

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