Series KA/LA
2.0 to 7.5A, 250 Vrms Optically Isolated
AC Solid-State Relay
Part Number* Relay Description
KA00HF
KA58HF
LA00HL
LA58HL
2 A, 250 Vrms, AC Solid-State Relay
2 A, 250 Vrms, AC Solid-State Relay with Thermal
Protection and Thermal TRIP Status
7.5 A, 250 Vrms, AC Solid-State Relay
7.5 A, 250 Vrms, AC Solid-State Relay with Thermal
Protection and Thermal TRIP Status
* The Y suffix denotes parameters tested to MIL-PRF-28750 test methods.
The W suffix denotes parameters tested to Teledyne specifications.
ELECTRICAL SPECIFICATIONS
(-55°C TO +110°C UNLESS OTHERWISE SPECIFIED)
INPUT (CONTROL) CHARACTERISTICS
2 Terminal Configuration (See Fig. 1)
Input Voltage (See note 2)
Input Current (See Figure 1)
V
IN
= 5 Vdc
Turn-Off Voltage (Guaranteed Off)
Turn-On Voltage (Guaranteed On)
Reverse Voltage Protection
Min
3.8
Max
32
Units
Vdc
15
1.5
3.8
-32
mA dc
Vdc
Vdc
Vdc
FEATURES/BENEFITS
• Available with thermal protection
and thermal TRIP status: Provides
self-protection from thermal
runaway conditions and indicates
protection state for system BIT.
• Optical Isolation: Isolates control
elements from load transients with
reduced EMI.
• Fully Floating Output: Eliminates
ground potential loops and allows
the output to sink or source current.
• Buffered Control: Relay can be
controlled directly from TTL or
CMOS logic circuits.
• Integral Snubber Circuit: Enhances
dV/dt capability while minimizing
EMI.
DESCRIPTION
The Series KA/LA solid-state relays
(SSRs) is designed for use in AC
power switching applications where
safety and reliability are primary
concerns. These SSRs are rated for
load voltages up to 250 Vrms from 40
to 440 Hz and are ideal for resistive
and reactive loads with power factors
as low as 0.2. Inverse parallel SCRs
are configured for zero voltage turn on.
Optical isolation to 1250 Vrms between
the control (input) and load (output)
allows the load to be safely controlled
by logic circuitry. The KA/LA series is
available with thermal protection and
thermal TRIP status. In case of a
thermal runaway condition, the SSR
will shut down the output switch and
latch off until the input is reset and the
junction temperature returns to a safe
level. When the output does latch off,
the TRIP status line will yield a logic
level output indicating the protection
state of the SSR. This feature provides
the user with failure mode indication
while enhancing the system diagnostic
capability. These SSRs are available to
the Y screening level of MIL-PRF-
28750 and are packaged in low-profile
hermetically sealed cases.
INPUT (CONTROL) CHARACTERISTICS
3 Terminal Configuration (See Fig. 1)
Bias Voltage (See note 2)
Bias Current (V
IN
=32 Vdc)
Control Voltage Range
Control Current (at 5 Vdc)
Turn-On Control Voltage
Turn-Off Control Voltage
Min
3.8
Max
32
16
Units
Vdc
mA
Vdc
µAdc
Vdc
Vdc
0
18
250
0.3
3.2
OUTPUT (LOAD) SPECIFICATIONS
Min
Max
Units
Load Voltage
Frequency Range
Continuous Load Current (See Figure 3)
KA and LA without Heat Sink
LA with Heat Sink
Output Voltatge Drop
20
40
250
440
2.0
7.5
1.2
Vrms
Hz
Arms
Arms
Vrms
KA/LA 78
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
© 2002 TELEDYNE RELAYS
KA/LA\072002\Q1
Series KA/LA
OUTPUT (LOAD) SPECIFICATIONS
BLOCK DIAGRAM
Max
10
Units
mA
Min
Off-State Leakage Current
(250 Vac, 400 Hz)
Turn-On Time
Turn-Off Time
Transient Voltage (5 sec, 25°C)
Zero Voltage Turn-On Point
dv/dt
Surge Current
Load Power Factor
Insulation Resistance @ 500 Vdc
Input to Output Capacitance
Dielectric Withstanding Voltage (60Hz)
1250
100
1/2
1
+500
+15
Cycle
Cycle
V pk
V pk
V/µs
MIL-PRF-28750
0.2
10
9
15
Ohm
pF
Vrms
125
30
5
o
o
MECHANICAL SPECIFICATIONS
Junction Temperature at Rated Current (T
J
Max)
Thermal Resistance Junction to Ambient (θ
JA
)
Thermal Resistance Junction to Case (θ
JC
)
C
C/W
C/W
o
STATUS OUTPUT TRUTH TABLE
Status
Output State
Off (High)
On (Low)
Off (High)
On (Low)
Control
Input
Low
Low
High
High
Output
(Load) State
On
Tripped (Off)
Off
Non-applicable condition
STATUS OUTPUT SPECIFICATIONS
Min
Status Supply Voltage
Status “OFF” Leakage Current @ 32 Vdc
Status Sink Current (V
so
≤
0.4 Vdc)
Status “ON” State Voltage @10mAdc
Max
32
10
10
0.4
Units
Vdc
µAdc
mAdc
Vdc
DIMENSIONS ARE SHOWN IN INCHES
(MILLIMETERS)
© 2002 TELEDYNE RELAYS
(800) 284-7007 • www.teledynerelays.com
KA/LA 79
KA/LA\072002\Q1
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