Solid State Relays

Traffic Sensor Corporation's Solid State Relays (SSRs) are designed for use as On/Off, zero voltage crossing switches. SSRs may be used to control incandescent lamp, heater, pump, and motor loads. 25 ampere power triacs are utilized inside these relays with 40 ampere models available. These relays feature an optical coupler which isolates dc control circuitry from ac load circuitry. These relays will switch loads up to 10 amperes at 74°C when mounted to an appropriate heat sink. These devices meet New York, NEMA, and California traffic signal standards.
Protection against false triggering is provided by a dv/dt snubber network across the output. Inductive loads may be switched to a maximum of 10 amperes at a power factor of 0.85 at 60Hz at 74°C.

**General Specifications**
Duty	Continuous
Expected Life	Minimum of 30 million operations while switching a 1000 watt tungsten filament load. Typically greater than 100 million operations
Temperature Range	Storage: -40°C to +85°C Operating Ambient: -37°C to +74°C
Isolation	2000 Volts DC minimum, Input to Output
Insulation Resistance	10⁹ ohms minimum.
Zero Voltage Switching	Output turns on within 10 electrical degrees of the first on-half cycle of line voltage during which the input signal is applied, and within 5 degrees on all subsequent cycles. Output power is removed within 5 degrees of the first zero-load current crossing after removal of the input signal.

**Model Specifications**
	Model 202I	Model 302
Application	Load Switches	Flashers
Maximum On Voltage	12 Volts D.C.	4 Volts D.C.
Minimum Off Voltage	8 Volts D.C.	1 Volt D.C.
Maximum Input Voltage	32 Volts D.C.	32 Volts D.C.
Maximum Reverse Input Voltage	32 Volts D.C.	32 Volts D.C.

**Other Relay Models**
Model	Description
4312-3	Solid State, 11 pin octal base double pole/double throw with LED. Replaces Econolite P/N 44846P1 and Potter & Brumfield P/N KB-4312-3. 1.75" width x 3.6" height installed.
4448COC	Model 4312-3 rewired to replace Potter & Brumfield P/N KB-4448
CTC 3-85	Used with 11 pin octal base latch relays to adapt to Fisher-Porter 10 pin banana pin configuration.
430	8 pin blade type connector, electro-mechanical, flash transfer relay for 170 type controller assemblies.

Home Page
Monitors · Testers · Load Switches · LMS · COMMS · Harnesses · Isolators · Ped. Signal

Contact TSC for further information