SENSITRON
SEMICONDUCTOR
SPDBXXD28 Series
TECHNICAL DATA
DATASHEET 5104, Rev D
28V DC Solid State Power Controller Module
Description:
This Solid State Power Controller (SSPC) Module is designed to operate without any heatsink requirements.
This is microcontroller-based Solid State Relays rated up to 35A designed to be used in high reliability 28V
DC applications. This module has integrated current sensing with no derating over the full operating
temperature range. This module is the electronic equivalent to electromechanical circuit breakers with
isolated control and status.
SPDB35D28
SPDB10D28
Protection to 35A
Protection to 10A
NO ADDITIONAL HEATSINK REQUIRED upto ambient air temperature of 85C for full rated power
Compliant Documents & Standards:
MIL-STD-704F
MIL-STD-217F, Notice 2
MIL-STD-1275B
Aircraft Electrical Power Characteristics 12 March 2004
Reliability Prediction of Electronic Equipment 28 Feb 1995
Characteristics of 28 Volt DC Electrical Systems in
Military Vehicles 20 November 1997
Module Features:
Extremely Low Power, No Derating Over the Full Temperature Range
Avalanche rated mosfets to handle high levels of line spike
Low Weight (62 grams typ)
Potted Module
Solid State Reliability
High Power Density
Electrical Features:
28VDC Input with Very Low Voltage Drop; 120mV, typ. @ 35A
True I2t Protection up to 12X Rating with Nuisance Trip Suppression => Trip Time Constant 1.3 Seconds
Instant Trip Protection (1 msec typ) for Loads Above 12X rating => Protection for Mosfets in the Module
Unlimited Interrupt Capability; Repetitive Fault Handling Capability
Thermal Memory
Internally Generated Isolated Supply to Drive the Switch
Low VBias Current: 60 mA typ @ 5V DC
High Control Circuit Isolation: 750V DC Control to Power Circuit
Soft Turn-On to Reduce EMC Issues => Output Slew Rate Control
EMI Tolerant
Module Reset with a Low Level Signal; Reset Circuit is Trip-Free
TTL/CMOS Compatible, Digitally Isolated, Input and Outputs
Input filter for Noise Immunity
Battle Short to override the Trip condition
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