DC SOLID STATE RELAY Series SR75-2 0.75 A, 300 Vdc OPTICALLY ISOLATED SHORT CIRCUIT PROTECTED FOR AC OR DC LOADS Part Number* Relay Description SR75-2 Solid State Relay with Terminals for Through Hole Mount SR75-2S * Solid State Relay with Terminals for Surface Mount A ‘W’ or ‘T’ suffix denoting the S2R™ Teledyne reliability screening level, must be added to the part number. ELECTRICAL SPECIFICATIONS (-55°C TO 105°C, Ambient Temperature Unless Otherwise Specified) INPUT (CONTROL) SPECIFICATIONS Control Voltage Range (See Note 6) Min Max Units 3.8 32.0 Vdc 11.0 mA Input Current @ 5 Vdc (See Figure 1) Must Turn-On Voltage 3.8 Must Turn-Off Voltage Vdc 1.5 Reverse Voltage Protection Vdc -32.0 Vdc FEATURES/BENEFITS • Short Circuit Protected - Prevents damage to system components, assemblies and system wiring. Can be connected to protect AC or DC loads (AC with diode bridge) • Optical Isolation - Isolates control circuits from load transients Eliminates ground loops and signal ground noise • Low Off-State Leakage - For high offstate impedance • Switches High Voltages - To 300 Vdc • Switches High Currents - To 0.75 Adc • High Noise Immunity - Control signals isolated from switching noise • High Dielectric Strength - For safety and for protection of control and signal level circuits OUTPUT (LOAD) SPECIFICATION Min Max Units Load Voltage Rating 300 Vdc Transient Blocking Voltage 320 Vdc Output Current Rating (See Figure 2) 0.75 Adc On Resistance (See Figure 3) 2.0 Ohm Leakage Current at Rated Voltage 100 µA Turn-On Time 4.5 ms Turn-Off Time 0.5 ms dV/dt @ 60 V @ 25°C 100 Electrical System Spike @ 25°C ± 600 Vpk Output Capacitance @ 100 KHz, 25 Vdc Input to Output Capacitance at 1 KHz Dielectric Strength Insulation Resistance Junction Temperature © 2000 TELEDYNE RELAYS V/µs 300 pF 5 pF 1000 Vrms 108 Ohm 130 DESCRIPTION The SR75-2 solid state relay utilizes a power FET switch that is protected against overload and short circuit currents. The short circuit protection feature not only provides protection should a short or overload occur while the relay is on, but will also provide protection should the relay be switched into a short. Once the protection trips the relay, it will remain off until reset by cycling the input control line. Using the SR75-2 to switch power sources and loads can prevent fires, damage to system assemblies and system wiring. The power FET output offers low “ON” resistance and can switch loads in either the high or the low side of the power line. The SR75-2 is packaged in a 16 pin DIP package with either surface mount or through hole mounting available. BLOCK DIAGRAM °C 800-284-7007 • www.teledynerelays.com Page 69 SR75-2 CONTROL CURRENT VS VOLTAGE FIGURE 1 LOAD CURRENT DERATING CURVE FIGURE 2 (SEE NOTE 5) TRIP CURRENT VS TIME FIGURE 4 WIRING CONFIGURATIONS TYPICAL ON RESISTANCE VS TJ FIGURE 3 MECHANICAL SPECIFICATIONS SHORT CIRCUIT PROTECTED DC LOADS (SEE NOTES 3, 4 AND 6, FIGURE 3 AND 4) 0.290 (7.37) NOTES: 1. 2. • • • • • Page 70 Operating Temperature Range 55°C to 105°C Storage Temperature Range -55°C to 125°C Weight: 2.0 grams maximum Case: 16 pin Dual-In-Line (TO116) Case Material: Filled Epoxy, self extinguishing 3. 4. 5. 6. SHORT CIRCUIT PROTECTED AC LOADS (SEE NOTE 6) The input voltage is 5.0 Vdc for all tests unless otherwise specified. Reversing the output polarity when the relay is in overload or is sustaining a short circuit may cause permanent damage. Inductive loads must be diode suppressed. Loads may be switched in either the high side or the low side of the power source. Continuous load current rating is determined with relay mounted on a printed circuit card. For input voltage greater than 6.0 Vdc a series resistor must be used to limit the power dissipation on the input of the relay. The resistor value should be selected using the following equation: R = (VBIAS - 6 volts)/11mA SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE © 2000 TELEDYNE RELAYS