SENSITRON
SEMICONDUCTOR
SPD40D28
TECHNICAL DATA
DATASHEET 5012, Rev. -
DC Solid State Power Controller Module
Description:
The Solid State Power Controller (SSPC) Module is a 40 Amp microcontroller-based Solid State Relay
designed to be used in hi-rel 28V DC applications. This module has integrated current sensing with no
derating over the full operating temperature range. The module is the electronic equivalent to an
electromechanical circuit breaker with isolated control and status.
Compliant Documents & Standards:
MIL-STD-1275B, Notice1 Characteristics of 28 Volt DC Electrical Systems in Military Vehicles –
20 April 2004
MIL-STD-704F
Aircraft Electrical Power Characteristics - 12 March 2004
Reliability Prediction of Electronic Equipment - 28 Feb 1995
MIL-STD-217F, Notice 2
Module Features:
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Epoxy Shell Construction
Solid State Reliability; Low Weight (20 gms) - High Power Density
Same Pin Out as Industry Standard SSPCs in a Smaller Outline
Extremely Low Power, No Derating Over the Full Temperature Range
Electrical Features:
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28VDC Input: Current Rating of 40A with Very Low Drop; 24mV, typ.
True I2t Protection from 50A to 400A with Nuisance Trip Suppression
Instant Trip Protection (50 µsec typ) for Loads Above 400A
Unlimited Interrupt Capability; Repetitive Fault Handling Capability
Thermal Memory
Internally Generated Isolated Supply to Drive the Switch
Low Bias Supply Current: 20 mA typ @ 5V DC
High Control Circuit Isolation: 750V DC Control to Power Circuit
Soft Turn-On to Reduce EMC Issues
EMI Tolerant
Module Reset with a Low Level Signal; Trip Reset Circuit is Trip-Free
TTL/CMOS Compatible, Optically Isolated, Input and Outputs
Schmitt-Trigger Control Input for Noise Immunity
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