DC SOLID STATE RELAY Series SR75-1 1.5A , 60 VDC OPTICALLY ISOLATED SHORT CIRCUIT PROTECTED Part Number* Relay Description SR75-1 Solid State Relay with Terminals for Through Hole mount SR75-1S * 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 2) 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 Max Units Load Voltage Rating 60 Vdc Transient Blocking Voltage 80 Vdc Output Current Rating (See Figure 2) 1.5 Adc On Resistance (See Figure 3) 0.5 Ohm Leakage Current at Rated Voltage 100 µA Turn-On Time 4.5 ms Turn-Off Time 0.5 ms dV/dt @ 60 Vdc @ 25°C 100 Electrical System Spike Input to Output Capacitance at 1 KHz Dielectric Strength V/µs ± 600 Vpk Output Capacitance • Short Circuit Protected -Prevents damage to system components, assemblies and system wiring • 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 Currents - To 1.5 Adc • High Noise Immunity - Control signals isolated from switching noise • High Dielectric Strength - For safety and for protection of control and signal level circuits DESCRIPTION OUTPUT (LOAD) SPECIFICATION Min FEATURES/BENEFITS 200 pF 5 pF 1000 Vrms 108 Ohm The SR75-1 solid state relay utilizes a power FET switch that is protected against short circuit and overload 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. In either case, the relay will sense the short circuit condition and then block it indefinitely until the short is removed and the unit is reset by cycling the input control. Using the SR75-1 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 SR75-1 is packaged in a 16 pin DIP package with either surface mount or through hole mounting available. BLOCK DIAGRAM Insulation Resistance Junction Temperature 130 °C Thermal Resistance (Junction to Ambient) 90 °C/W © 2000 TELEDYNE RELAYS 800-284-7007 • www.teledynerelays.com Page 67 SR75-1 INPUT CURRENT VS VOLTAGE FIGURE 1 LOAD CURRENT DERATING CURVE FIGURE 2 (SEE NOTE 7) TRIP TIME VS. OVERLOAD CURRENT FIGURE 4 WIRING CONFIGURATIONS TYPICAL ON RESISTANCE VS TJ FIGURE 3 MECHANICAL SPECIFICATIONS SHORT CIRCUIT PROTECTED DC LOADS (SEE NOTES 2, 4 AND 6) NOTES: 0.290 (7.37) 1. 2. • • • • • Page 68 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, self extinguishing 3. 4. 5. 6. 7. The input voltage is 5.0 Vdc for all tests unless otherwise specified. 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 The input transitions are to be less than 1.0 msec duration. Inductive loads must be diode suppressed. Reversing the output polarity when the relay is in overload or is sustaining a short circuit may cause permanent damage. 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. SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE © 2000 TELEDYNE RELAYS