? 2005 teledyne relays (800) 284-7007 ? www.teledynerelays.com zd20cf page 1 2dszd20cf rev -- zd20cf series 2 a, 60 vdc optically isolated short-circuit protected part number description zd20cf* 2a, 60 vdc, short-circuit protected u p to 33 vdc, solid-state relay for through-hole mounting szd20cf* 2a, 60 vdc, short-circuit protected u p to 33 vdc, solid-state relay for surface mount *w for +25c ambient; t for over-temperature screen electrical specifications (C55c to +105c ambient temperature unless otherwise speci?ed) input (control) specifications min max units input current 8 20 ma input voltage @10ma 2 3 vdc must turn-on 8 ma must turn-off current 100 a must turn-off voltage 0.8 vdc reverse polarity C6 vdc output (load) specifications min max units load voltage range 0 60 vdc output current rating (see figure 5) 2.0 a leakage current at rated voltage 10 a transient blocking voltage @25c 100 vdc output capacitance @25vdc (25c) 600 pf output voltage drop @2a 0.30 vdc on resistance 0.15 ohm turn-on time 3.0 ms turn-off time 1.0 ms trip overload (see figure 6) a short circuit protection 33 vdc operating frequency 10 hz features/benefits ? short-circuit protected ? overload protected ? 2 amp load ? low off-state leakage ? optical isolation ? compact 6-pin package description zd20cf series relays have optical isolation between relay input and output. loads may be connected to either the positive or negative output terminals. zd20cf relays act as electronic circuit breakers that sense shorted loads or other overload events and then trip -off. relay contacts open and no current ?ows through the relay and associated loads. these relays prevent o vercurrent damage to the system. cycling the relay on-off removes the tripped or latched-off condition and returns the relay to the normal operating state. general specifications (+25c ambient temperature unless otherwise speci?ed) environmental specifications min max units operating temperature C55 +105 c storage temperature C55 +125 c junction temperature @2a +125 c thermal resistance ja +120 c/w dielectric strength 1000 vac insulation resistance (@500 vdc) 10 9 ohm input to output capacitance 5 pf shock mil-std-202, method 213, cond. f, 1500g vibration mil-std-202, method 204, cond. f, 100g resistance to soldering heat mil std 202, method 210 solderability mil std 202, method 208 thermal shock mil std 202, method 107
zd20cf page 2 specifications are under revision control ? 2005 teledyne relays 2dszd20cf rev -- zd20cf series 2 a, 60 vdc optically isolated short-circuit protected mechanical specifications figure 1 typical wiring diagram *shorted internally **series resistor required to limit input current to 20ma maximum load load * * 6 5 4 1 2 3 rs ** z d20c f figure 2 typical turn-on time vs. input current figure 4 figure 4 control current vs. input voltage volts control current (ma) 20 18 16 14 12 10 8 6 4 2 0 0 .5 1.0 1.5 2.0 2.5 3.0 3.5 +105c +25c C55c load current vs. ambient temperature figure 5 figure 3 ambient temperature (c) load current (a) 2.4 2.0 1.6 1.2 0.8 0.4 0 C55 C35 C15 5 25 45 65 85 105 125
? 2005 teledyne relays (800) 284-7007 ? www.teledynerelays.com zd20cf page 3 2dszd20cf rev -- zd20cf series 2 a, 60 vdc optically isolated short-circuit protected figure 6 typical overload current vs. trip time notes: 1. the zd20cf relays input current should be limited to between 8 and 20ma. an external resistor whose value =(v in C 2.5 volts) 0.012 amps is a good choice for limiting input current. 2. relay input transitions should be less than 1.0 millisecond. 3. loads may be attached to either the positive or negative output terminal. 4. maximum load current ratings are with the relay in free air and soldered to a printed circuit board. 5. timing is measured from the input current transition to the 10% or 90% points on the output voltage transition. 6. overload conditions (including shorted loads) are speci?ed for load supply voltages to 33 vdc maximum. 7. for through-hole-pcb-solder-attaching zd20cf series relays, the wave-solder or solder pot operations are limited to +260c maximum for 10 seconds, maximum. 8. for surface-mount-solder-attaching szd20cf series relays, in ir heating or convection heating systems, the component temperature is limited to +235c maximum for 10 seconds maximum. functional block diagram figure 7 +in (1) input with leds Cin (3) optical isolation detection circuit switching circuit output switch (mosfet) with current sense +out (6) Cout (4)
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