2004 TELEDYNE RELAYS
(800) 284-7007 www.teledynerelays.com
SR75-1 1
SR75-1\062004\Q1
1.5A, 60Vdc Optically Isolated, Short-Circuit Protected
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.
Series SR75-1
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
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
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 (See Note 3)
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, Note 8)
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 (See Note 8)
100
V/
s
Electrical System Spike (See Note 9)
± 600 Vpk
Input to Output Capacitance at 1 MHz (See Note 9)
20
pF
Dielectric Strength
1000
Vrms
Insulation Resistance
108
Ohm
Junction Temperature
130
°C
Thermal Resistance (Junction to Ambient)
90
°C/W
Solderability (10 sec)
260
°C