© 2002 TELEDYNE RELAYS (800) 284-7007 • www.teledynerelays.com KD/LD 51
KD/LD\072002\Q1
10A, 60Vdc Optically Isolated, Short-Circuit Protected
DC Solid-State Relay
FEATURES
•Available with short-circuit/current
overload protection
•Available with switch status output
• TTL and CMOS compatible control
• Low ON resistance power FET output
•Fast switching speed
• Meets 28 Vdc system requirements of
MIL-STD-704
•Optical isolation
• Low profile hermetic package
•Built and tested to the requirements of
MIL-PRF-28750
DESCRIPTION
The Series KD and LD solid-state relays
are screened utilizing MIL-PRF-28750
test methods and are packaged in low
profile hermetically sealed cases. These
relays are constructed with state-of-the-
art solid state techniques and feature
fully floating power FET output
technology. This allows the load to be
connected to either output terminal and
provides a low ON resistance. The input
(control) and output are optically isolated
to protect input logic circuits from output
transients. Available options include
short circuit and current overload
protection, which provides complete
protection for both the relay and system
wiring. This 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. The second option
is a status output line. Switch status
returns the true status of the output
switch and is optically isolated from the
load. It provides status indication
independent of the control circuit of the
relay. The status line provides a logic 0
(low) when the relay output is off with
load voltage and continuity present, and
a logic 1 (high) when the output is on.
Series KD/LD
Part Number* Relay Description
KD00CK 5A Solid-State Relay (SSR)
KD02CK 5A SSR with Switch Status
KD20CK 5A SSR with Short-Circuit Protection
KD22CK 5A SSR with Short-Circuit Protection and Switch
Status
LD00CM 10A Solid-State Relay
LD02CM 10A SSR with Switch Status
LD20CM 10A SSR with Short-Circuit Protection
LD22CM 10A SSR with Short-Circuit Protection and Switch
Status
* The Y suffix denotes parameters tested to MIL-PRF-28750 specifications.
The W suffix denotes parameters tested to Teledyne specifications.
ELECTRICAL SPECIFICATIONS
(-55°C TO +105°C UNLESS OTHERWISE NOTED)
INPUT (CONTROL) SPECIFICATION
When used in 2 terminal configuration
(TTL or direct control) (See Fig. 1) Min Typ Max Units
Input Current @ VBIAS = 5 Vdc (See Fig. 2) 15 mAdc
Turn-Off Voltage (Guaranteed Off) 1.5 Vdc
Turn-On Voltage (Guaranteed On) 3.8 Vdc
Reverse Voltage Protection -32 Vdc
Input Supply Range (See Note 1) 3.8 32 Vdc
INPUT (CONTROL) SPECIFICATION
When used in 3 terminal configuration
(CMOS or open collector TTL) (See Fig. 1) Min Typ Max Units
Control Current
VCONTROL = 5 Vdc 250 µAdc
VCONTROL = 18 Vdc 1 mAdc
Control Voltage Range 0 18 Vdc
Bias Supply Voltage (See Note 1) 3.8 32 Vdc
Bias Supply Current 16 mAdc
Turn-Off Voltage (Guaranteed Off) 3.2 Vdc
Turn-On Voltage (Guaranteed On) 0.3 Vdc
KD/LD 52 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE © 2002 TELEDYNE RELAYS
KD/LD\072002\Q1
Series KD/LD
OUTPUT (LOAD) SPECIFICATIONS
(See Note 2) Min Typ Max Units
Continuous Load Current (See Fig. 3)
KD and LD series without heat sink 5 Adc
LD series with heat sink 10 Adc
Leakage Current @ VLOAD=60Vdc
KD00CK, KD20CK 100 µA
LD00CM, LD20CM 100 µA
KD02CK, KD22CK 2 mA
LD02CM, LD22CM 2 mA
Output Voltage Drop
KD00CK, KD02CK .60 Vdc
KD20CK, KD22CK .70 Vdc
LD00CM, LD02CM @10A 1.2 Vdc
LD20CM, LD22CM @10A 1.4 Vdc
Continuous Operating Load Voltage 60 Vdc
Transient Blocking Voltage @25°C80Vdc
ON Resistance, ILOAD = 100 mA, TJ = 25°C, (See Note 3)
KD00CK, KD02CK .075 Ohm
LD00CM, LD20CM .075 Ohm
KD20CK, KD22CK .100 Ohm
LD20CM, LD22CM .100 Ohm
Turn-On Time (See Fig. 5) 5 ms
Turn-Off Time (See Fig. 5) 2 ms
Electrical System Spike @25°C±600 Vpk
Output Capacitance at 25 Vdc, 100 KHz 1600 pF
Isolation (Input to Output)
KD00CK, KD20CK 10 pF
LD00CM, LD20CM 10 pF
KD02CK, KD22CK 15 pF
LD02CM, LD22CM 15 pF
Dielectric Strength 1000 Vac
Insulation Resistance @ 500 Vdc 109Ohms
Output Junction Temperature 130 °C
@ ILOAD = Imax rated
Maximum Junction Temperature 150 °C
Thermal Resistance Junction to Ambient (θJA)30°C/W
Thermal Resistance Junction to Case (θJC)7°C/W
MECHANICAL SPECIFICATION
BLOCK DIAGRAM
NO STATUS
© 2002 TELEDYNE RELAYS (800) 284-7007 • www.teledynerelays.com KD/LD 53
KD/LD\072002\Q1
Series KD/LD
ENVIRONMENTAL SPECIFICATIONS
Min Typ Max Units
Temperature Range
Operating -55 +105 °C
Storage -55 +125 °C
Vibration 100 g 10 3000 Hz
Constant Acceleration 5000 g
Shock 0.5 ms pulse 1500 g
STATUS OUTPUT TRUTH TABLE
(KD02CK, LD02CM, KD22CK, LD22CM)
Control Voltage Relay Output State Status Output Level
High Off Low (VSO ≤ 0.4 Vdc)
Low On High (VSO = VSTATUS)
STATUS OUTPUT SPECIFICATIONS
(KD02CK, LD02CM, KD22CK, LD22CM)
Min Typ Max Units
Status Supply Voltage 30 Vdc
Status Leakage Current
@16Vdc 10 µAdc
@30Vdc 100 µAdc
Status (sink) Current (VSO < 0.4 Vdc) 600 µAdc
Status Turn-On Time (See Fig. 6) 3.5 ms
Status Turn-Off Time (See Fig. 6) 8.0 ms
BIAS (INPUT) CURRENT VS BIAS (INPUT) VOLTAGE
FIGURE 2 (See Note 1)
WIRING CONFIGURATIONS
FIGURE 1 (See Note 1)
KD/LD 54 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE © 2002 TELEDYNE RELAYS
KD/LD\072002\Q1
Series KD/LD
NOTES:
1. Control input is compatible with CMOS or open collector TTL (with pull up resistor). For
bias voltages above 6V, a series resistor is required. Use the standard resistor value
equal to or less than the value found in Figure 8.
2. The rated input voltage is 5V for all tests unless otherwise specified.
3. To calculate the maximum ON resistance for a given junction temperature, find the
normalized ON resistance factor (NR) from Figure 4. Calculate the new ON resistance
as follows:
R(ON) = NR • RON @ 25°C
(KD00CK, LD00CM, KD02CK, LD02CM)
R(ON) = NR(RON @ +25°C ) + .025 ohm
(KD20CK, LD20CM, KD22CK, LD22CM)
4. Overload testing to the requirements of MIL-PRF-28750 is constrained to the limits
imposed by the short circuit protection characteristics as defined in this specification.
System series inductance for “shorted-load” mode of operation should be 50 µH.
Maximum repetition rate into a shorted load should not exceed 10 Hz.
5. A status pull up resistor is required for proper operation of the status output. Determine
the current (Iso) required by the status interface. Calculate the current (Is) through the
status resistor such that the sink current through the status output is 0.6 mA. Select the
status resistor such that it does not allow more than 0.6 mA to flow through the status
output.
RSTATUS = VSTATUS - 0.4V
Iso
6. Inductive loads should be diode suppressed. Input transitions should be ≤1 ms duration
and the input drive should be a bounceless contact type.
LOAD CURRENT DERATING CURVE FOR
LD SERIES
(B)
THERMAL DERATING CURVES
FIGURE 3
SERIES LIMIT BIAS RESISTOR VS
BIAS VOLTAGE
FIGURE 8 (See Note 1)
TYPICAL TRIP CURRENT
CHARACTERISTICS FOR SHORT
CIRCUIT CONDITIONS
FIGURE 9
STATUS TURN-ON AND TURN-OFF
TIMING
FIGURE 6
OUTPUT TURN-ON AND TURN-OFF
TIMING
FIGURE 5
LOAD CURRENT DERATING CURVE FOR
KD/LD SERIES WITHOUT A HEAT SINK
(A)
NORMALIZED ON RESISTANCE VS
JUNCTION TEMPERATURE
FIGURE 4 (See Note 3)
OVERLOAD CURRENT VS TIME TO
TRIP (TYPICAL)
KD20CK, KD22CK, LD20CM, LD22CM
FIGURE 7
