? 2000 teledyne relays 800-284-7007 ? www.teledynerelays.com page 67 dc solid state relay features/benefits 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 off- state 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 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. 1.5a , 60 vdc optically isolated short circuit protected block diagram 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 s 2 r?teledyne reliability screening level, must be added to the part number. electrical specifications (-55c to 105c, ambient temperature unless otherwise specified) input (control) specifications min max units control voltage range (see note 2) 3.8 32.0 vdc input current @ 5 vdc (see figure 1) 11.0 ma must turn-on voltage 3.8 vdc must turn-off voltage 1.5 vdc reverse voltage protection -32.0 vdc output (load) specification min 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 a turn-on time 4.5 ms turn-off time 0.5 ms dv/dt @ 60 vdc @ 25c 100 v/s electrical system spike 600 vpk output capacitance 200 pf input to output capacitance at 1 khz 5 pf dielectric strength 1000 vrms insulation resistance 10 8 ohm junction temperature 130 c thermal resistance (junction to ambient) 90 c/w series sr75-1
page 68 specifications are subject to change without notice ? 2000 teledyne relays notes: 1. the input voltage is 5.0 vdc for all tests unless otherwise specified. 2. 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 = (v bias - 6 volts)/11ma 3. the input transitions are to be less than 1.0 msec duration. 4. inductive loads must be diode suppressed. 5. reversing the output polarity when the relay is in overload or is sustaining a short circuit may cause permanent damage. 6. loads may be switched in either the high side or the low side of the power source. 7. continuous load current rating is determined with relay mounted on a printed circuit card. mechanical specifications load current derating curve figure 2 (see note 7) input current vs voltage figure 1 sr75-1 wiring configurations trip time vs. overload current figure 4 operating temperature range -55c to 105c s torage temperature range -55c to 125c weight: 2.0 grams maximum case: 16 pin dual-in-line (to-116) case material: filled epoxy, self extinguishing typical on resistance vs t j figure 3 short circuit protected dc loads (see notes 2, 4 and 6)
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