Preliminary
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SSC3 Owner’s Manual
Document: OM-216 Version Code:
Date: Sept 13, 2021 Date:
InPower LLC
8311 Green Meadows Drive
Lewis Center, Ohio 43035 USA
740-548-0965
www.InPowerLLC.com
© Copyright 2021 InPower LLC
1.0 Introduction
The InPower SSC3 Series is a family of high current solid state DC contactors. These contactors are available in
current ratings of 200 and 300 amps, and are packaged plastic case with a metal baseplate. As they have ex-
tremely low current draw when in the off state, they are ideally suited for use as load disconnect switches. A key
feature is the contactor’s highly efficient, low on-resistance, DC power switch. This results in superior performance
by producing a low voltage drop and generating only a small amount if internal heat.
The SSC3 family also incorporates LoadLogic technology which automatically compensates for different types of
loads, starting up difficult loads, yet accurately detecting a dead short fault. It assists with starting up into resistive
loads, inductive loads, capacitive loads, incandescent loads, and identifies dead short faults.
The status LED indicator is on when the SSC3 is ON (off when OFF), and flashes to indicate a fault shutdown.
Automatic fault shutdown occurs for over-current, loss of ground, high/low-battery voltage, and/or over-
temperature. In a fault condition the contactor is latched in the off state. To reset the unit the faults must be
cleared; then the control input voltage must be removed (<4.0V), then re-applied (>8.0V). Removing the +BAT
cable will also reset the unit.
The control INPUT and GND inputs utilize a 8-32 Threaded Terminals. The brass nuts on the INPUT and GND
terminals shall be torqued to 4-5 inch lbs. Connections for the high current DC cables utilize 3/8” - 16 brass bolts
and copper washers with brass contact pads for low contact resistance. Four 0.20” mounting holes allow for solid
mounting to a secure metal surface.
OWNERS MANUAL SSC3
Solid State Contactor Models:
SSC3-200A (200 Amps, 2 Lug)
SSC3-200B (200 Amps, 4 Lug)
SSC3-300 (300 Amps, 4 Lug)
InPower SSC3-200A Solid State Contactor
Ground
LOAD
Fuse
Battery
+
+12 Volt Loads
Ground
+12 Volts
Control Switch
Ground
