Series SR75-2 0.75A, 300Vdc Optically Isolated, Short-Circuit Protected for AC or DC Loads DC Solid-State Relay 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 Teledyne reliability screening level, must be added to the part number. • 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) 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 • Optical Isolation: Isolates control circuits from load transients Eliminates ground loops and signal ground noise 11.0 mA • Low Off-State Leakage: For high offstate impedance Input Current @ 5 Vdc (See Figure 1) Must Turn-On Voltage (See Note 7) FEATURES/BENEFITS 3.8 Must Turn-Off Voltage Reverse Voltage Protection Vdc 1.5 Vdc • High Noise Immunity: Control signals isolated from switching noise -32.0 Vdc • High Dielectric Strength: For safety and for protection of control and signal level circuits OUTPUT (LOAD) SPECIFICATION Min • Switches High Voltages: To 300 Vdc • Switches High Currents: To 0.75 Adc Max Units DESCRIPTION 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 @ 60V (See Note 8) 100 V/µs ± 600 Vpk Electrical System Spike (See Note 8) Output Capacitance @ 100 KHz, 25 Vdc (See Note 8) 250 pF Input to Output Capacitance at 1 KHz (See Note 8) pF Dielectric Strength (See Note 8) Insulation Resistance (See Note 8) 5 1000 Vrms 108 Ohm Junction Temperature 130 °C Thermal Resistance (Junction to Ambient) 90 °C/W Solderability (10 sec) 260 °C © 2004 TELEDYNE RELAYS 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. (800) 284-7007 • www.teledynerelays.com SR75-2 1 SR75-2\062004\Q1 INPUT CURRENT (mA) Series SR75-2 INPUT VOLTAGE (Vdc) CONTROL CURRENT VS VOLTAGE FIGURE 1 LOAD CURRENT DERATING CURVE FIGURE 2 (SEE NOTE 5) 2.0 ON-RESISTANCE (OHM) 1.8 1.6 TRIP CURRENT VS TIME FIGURE 4 1.4 1.2 1.0 0.8 WIRING CONFIGURATIONS 0.6 0.4 RS 0.2 0.0 –55 -35 -15 5 25 45 65 85 105 125 16 14 12 LOAD RETURN LOAD +V 10 JUNCTION TEMPERATURE (°C) TYPICAL ON RESISTANCE VS TJ FIGURE 3 SR75-2 VCC + 1 3 5 8 MECHANICAL SPECIFICATIONS SHORT-CIRCUIT PROTECTED DC LOADS (SEE NOTES 3, 4 AND 6, FIGURE 3 AND 4) V BIAS = 5.0 VDC TTL 16 14 12 10 LOAD CTRL SR75-2 1 3 5 V BIAS = 5.0 VDC 8 120 Vac SHORT-CIRCUIT PROTECTED AC LOADS (SEE NOTE 6) • 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 (TO-116) • Case Material: Filled epoxy, selfextinguishing SR75-2 2 NOTES: 1. The input voltage is 5.0 Vdc for all tests unless otherwise specified. 2. Reversing the output polarity when the relay is in overload or is sustaining a short circuit may cause permanent damage. 3. Inductive loads must be diode suppressed. 4. Loads may be switched in either the high side or the low side of the power source. 5. Continuous load current rating is determined with relay mounted on a printed circuit card. 6. 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 7. Input transitions are to be less than 1 msec. 8. Tested at 25°C ambient. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE © 2004 TELEDYNE RELAYS SR75-2\062004\Q1