ELECTRICAL/ELECTRONIC ARCHITECTURE
Delphi Solid State Relays (SSRs)
Delphi Solid State Relays (SSRs) provide variable load control
through Pulse Width Modulation (PWM). They can be used to
replace traditional electromechanical relays and fuses which are
found in electrical centers and other devices. Because they are
resettable, they provide the advantage of enabling maintenancefree circuit protection.
Two versions are available:
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10 Amp SSR — for variable load control such as motor
speed and dimmable lighting applications
40 Amp SSR (up to 120 Amp for 15 seconds) — for higher
current loads such as fuel injector heater applications.
o Load current feedback feature available
All Delphi SSRs are high side switching devices capable of driving
loads using PWM. A low active control signal applied to the relay
input pin activates the SSR, turning on the load connected to the
output pin.
Benefits
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Eliminates traditional fuses and relays and discrete circuits
No mechanical parts to wear out
o Pluggable device is easily integrated and serviceable
Supports PWM
Optimized static electromagnetic compatibility (EMC)
Packaged in a modified International Organization for
Standardization (ISO) power relay footprint
o Modification enables correct assembly to help prevent
plugging of standard ISO relay
Capable of driving resistive, capacitive and inductive loads
Thermal shutdown with restart
o Resettable circuit protection eliminates the need to
change fuses
Solid state switching with no audible noise
Provides protection from the following:
o Short circuits/overloads
o Over voltage (including load dump)
o Loss of ground
o Electrostatic discharge (ESD)
o Reverse battery
Robust for use in harsh underhood environments
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Delphi 10 Amp Solid State Relay (SSR) ─
bottom side showing lead arrangement/blade
configuration
Delphi 40 Amp Solid State Relay (SSR) —
bottom side showing lead arrangement/blade
configuration
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