Temperature
controller
vac
Vac
Driving
SSR
Fast Blow
Fuse
vac
vac
vac
vac
vac
Vac
Driving
SSR
Fast Blow
Fuse
Fast Blow
Fuse
Heater
Heater
Heater
ac Input
SSR
ac Input
SSR
dc Input
SSR
Temperature
controller
Temperature
controller
4
3
1
2
4
3
1
2
4
3
1
2
Load
Side
Load
Side
Load
Side
Control Side
Load
Resistor
Control
Side
Control
Side
ac Controlled SSR used with Temperature Controller with Triac Output
ac Controlled SSR used with Temperature Controller with Mechanical Relay Output
ac Controlled SSR used with Temperature Controller with dc Voltage SSR Driver Output
0 or 5 Vdc.,
Typically
C-54
C
ACCESSORIES
MAX ON STATE CURRENT, A 10 25 45 50 75 90
MIN ON STATE CURRENT, MA 100
MAX 1-CYCLE SURGE, A 100 250 450 500 700 1000
MAX 1 SEC SURGE, A 30 75 135 145 200 280
12T (60 HZ), A2SEC 200 260 840 1040 2345 3375
SOLID STATE RELAYS
HIGH RELIABILITY
UCurrent Ratings to
90 Amps
UMulti-Million Cycle Life
UCompatible with
Temperature Controllers
USolid-State, SCR Design
UZero Voltage Switching
UUL and CSA Certified
UControl ac Lines to
440 Vac
Uac and dc Control
Signal Models
U200% Testing at
Rated Current
Control resistance heaters up to
10 kW using solid state relays in
conjunction with lower rated temperature
controllers. Solid state relays are SPST,
normally open, switching devices with no
moving parts, capable of millions of
cycles of operation. By applying a control
signal, an SSR switches "ON" the ac load
current, just as the moving contacts do on
a mechanical contactor. Three-phase
loads can be controlled using 2 or 3
SSR’s. Use 3 SSR’s for “Y” or “star”
3-phase loads using a neutral line. Two
SSR’s will control “delta” loads with no
neutral line. Three solid state relays are
also used when there is no neutral load to
provide redundancy and extra assurance
of control.
“Switching” takes place at the zero
voltage crossover point of the alternating
current cycle. Because of this, no
appreciable electrical noise is generated,
making SSR’s ideal for environments
where there are apparatuses susceptible
to RFI.
OUTPUT SPECIFICATIONS
From
$27
SSR240DC25
shown with FHS-1
COMMON SPECIFICATIONS
Operating Temperature:
-4 to 176°F (-20 to 80°C)
Storage Temperature:
-40 to 176°F (-40 to 80°C)
Isolation:
4000 V rms, input to output;
2500 V rms input/output to ground
Capacitance:
8 pF, input to output (max)
Line Frequency Range:
47 to 63 Hz
Turn-On Time:
20 ms, ac; 05 cycle, dc
Turn-Off Time:
30 ms, ac; 05 cycle, dc
USA
MADE IN
C-55
INPUT-CONTROL SIGNAL INPUT & OUTPUT
CONTROL CONTROL CONTROL SIGNAL PEAK
SIGNAL SIGNAL SIGNAL INPUT REPETITIVE
MODEL NO. TYPE VOLTAGE TURN-ON TURN-OFF IMPEDANCE VOLTAGE MIN.*
SSR240AC10
SSR240AC25 ac 90
SSR240AC45 Control to 90 Vac 10 Vac 40 kΩ500 V
SSR240AC75 Signal 280 Vac
SSR240AC90
SSR240DC10
SSR240DC25 dc 3
SSR240DC45 Control to 3 Vdc 1 Vdc 1 kΩ500 V
SSR240DC75 Signal 32 Vdc
SSR240DC90
SSR440AC50 ac 90
SSR440AC75 Control to 90 Vac 10 Vac 40 kΩ1200 V
SSR440AC90 Signal 280 Vac
SSR440DC50 dc 3
SSR440DC75 Control to 3 Vdc 1 Vdc 1 kΩ1200 V
SSR440DC90 Signal 32 Vdc
SOLID STATE RELAYS
FHS Heat Sink Dimensions
Electrical Specifications
These SSR’s are of the twin SCR type,
inherently more reliable and capable of
higher overloads before failure than
triacs. Heat is developed in a solid state
relay due to the nominal voltage drop
across the switching device. To dissipate
the heat, an SSR must be mounted on a
finned heat sink or aluminum plate. An
SSR should be located where the
ambient temperature is relatively low,
since the current switching rating is
lowered as the temperature increases.
Another SSR characteristic is a small
leakage current across the output when
the relay is open. Because of this, a
voltage will always exist on the load side
of the device.
In comparing SSR’s with mechanical
contactors, the SSR has a cycle life many
times that of a comparably priced
contactor. However, SSR’s are more
prone to failure due to overload and
improper initial wiring. Solid state relays
can fail, contact closed, on overload
circuits.
Finned heat sinks are anodized
fabrications that come complete with
tapped mounting holes and screws. See
thermal rating curves and ordering
instructions for proper selection.
SSR baseplate to heat sink thermal
resistance is affected by use of a
thermally conducting compound.
OMEGATHERM®OT-201 placed
between the heat sink and SSR
baseplate will significantly improve
thermal conductivity. It is also suggested
that 10-inch-pounds of torque be used on
the SSR mounting screws.
END VIEW (TYP) (TYP.) TOP VIEW
4.56
CENTERS
#6
(SCREWS)
0.218 0.20 1.87 1.81
4.75
0.50
5.50
4.50
1.44
2.62
SSR MOUNTING HOLES (2) 8-32 THDS.
Dimensions: FHS-6 Heat Sink
(0.7°C/W Thermal Rating)
C
LC
L
2.000 0.167"
0.200"
0.062
2.000"4.416"
0.250" C1.875"
A
B
4.750"
0.125" R
8-32 TH'D
2 Places
DIMENSIONS IN INCHES
MODEL NO. A B C THERMAL RATING
FHS-1 3.00" 2.50" 0.56" 2 °C/W
FHS-2 5.50" 5.00" 1.81" 1.2 °C/W
C-56
C
ACCESSORIES
RMS AMPERES
AMBIENT TEMPERATURE
10 A MODELS
FHS-2
FHS-1
FREE AIR
3
6
9
12
15
18
20 30 40 50 60 70 80
NOMINAL NOMINAL MAX. MAX. OFF-STATE LEAKAGE
AC LINE LOAD CONTACT (25°C MAX. AMBIENT) DISSIPATION
MODEL NO. VOLTAGE CURRENT
VOLTAGE DROP
120 Vac 240 Vac 440 Vac WATT/AMPS
SSR240AC10 10 A 7.5 mA 15 mA 1.6
SSR240AC25 24 25 A 7.5 mA 15 mA 1.3
SSR240AC45 to 45 A 1.6 V 7.5 mA 15 mA N/A 09
SSR240AC75 280 Vac 75 A 7.5 mA 15 mA *
SSR240AC90 90 A 7.5 mA 15 mA *
SSR240DC10 10 A 7.5 mA 15 mA 1.6
SSR240DC25 24 25 A 7.5 mA 15 mA 1.3
SSR240DC45 to 45 A 1.6 V 7.5 mA 15 mA N/A 0.9
SSR240DC75 280 Vac 75 A 7.5 mA 15 mA *
SSR240DC90 90 A 7.5 mA 15 mA *
SSR440AC50 36 50 A 4 mA 8 mA 15 mA *
SSR440AC75 to 75 A 1.6 V 4 mA 8 mA 15 mA *
SSR440AC90 480 Vac 90 A 4 mA 8 mA 15 mA *
SSR440DC50 36 50 A 4 mA 8 mA 15 mA *
SSR440DC75 to 75 A 1.6 V 4 mA 8 mA 15 mA *
SSR440DC90 480 Vac 90 A 4 mA 8 mA 15 mA *
Derate current 20% for horizontal
fin mount
Derate current 50% for 220 Vac
Derate current 20% for horizontal
fin mount
Derate current 50% for 220 Vac
Derate current 20% for horizontal
fin mount
Derate current 50% for 220 Vac
Transients of 1 min. max duration above table value should be suppressed.
*For base plate temperature and max. power dissipation, see figures above.
Output-ac Load
1.75, 44.5*
1.870, 47.5
1.70, 43.2
1.95, 49.5
2.25, 57.2
.87, 22.1
Tolerances XX - .020 XXX - .010
1.10, 27.9
.172, 4.4 Two Places
1.00, 25.4 6-32 Thread
\
8-32 Thread
.010, .25 Clearance For Circuit Board Mounting
DIMENSIONS IN INCHES
* millimeters
ON-STA TE CURRENT (AMPS)
60
100
40
80
20
60
0
50
40
30
20
10
0010 20 30 40 50 60 70 80
120
115
110
90 100
80
70
BASEPLA TE TEMPERA TURE (°C)
POWER DISSIPA TION ( W A TTS)
AMBIENT TEMPERATURE (°C)
DERATE CURRENT 20% FOR HORIZONTAL FIN MOUNT
FREE AIR
FHS-1
FHS-2
FHS-6
90 A MODELS
105
60
100
40
80
20
60
0
50
40
30
20
10
0010 20 30 40 50 60 70 80
120
115
110
105
102
75
70
BASEPLA TE TEMPERA TURE (°C)
ON-STA TE CURRENT (AMPS)
POWER DISSIPA TION ( WATTS)
AMBIENT TEMPERATURE (°C)
DERATE CURRENT 20% FOR HORIZONTAL FIN MOUNT
FREE AIR
FHS-1
FHS-2
FHS-6
75 A MODELS
60
50
40
30
20
10
0
50
40
30
20
10
001020 30 40 50 60 70 80
120
115
110
105
100
95
90
BASEPLA TE TEMPERA TURE (°C)
ON-STA TE CURRENT (AMPS)
POWER DISSIP ATION (W A TTS)
AMBIENT TEMPERATURE (°C)
DERATE CURRENT 20% FOR HORIZONTAL FIN MOUNT
FREE AIR
FHS-1
FFH
FHS-6
50 A MODELS
RMS AMPERES
AMBIENT TEMPERATURE
25 A MODELS
FHS-2
FHS-1
FREE AIR
5
10
15
20
25
30
20 30 40 50 60 70 80
RMS AMPERES
AMBIENT TEMPERATURE
45 A MODEL
FHS-2
FREE AIR
10
20
30
40
50
60
20 30 40 50 60 70 80
C-57
SOLID STATE RELAYS
MODEL NO. MODEL NO.
CONTROLLER RESISTOR RESISTOR
MODEL NO. 120 Vac 240 Vac
CN2000, CN2010, SSRR20-12 SSRR20-50
CN2040
CN9131A, 9231, SSRR15-12 SSRR15-50
or 9231A
Shunt Resistor Guide for
Controllers with Triac or SSR Outputs
Fuses
Shunt Resistors
To Order
(Specify Model Number)
MODEL NO. PRICE VALUE
SSRR20-12 $6 2000 Ω, 12 watts
SSRR20-50 9 2000 Ω, 150 watts
SSRR15-12 6 1500 Ω, 12 watts
SSRR15-50 9 1500 Ω, 50 watts
To Order
(Specify Model Number)
MODEL NO. PRICE CAPACITY
KAX-10 $13 10 Aac
KAX-25 13 25 Aac
KAX-30 13 30 Aac
KAX-45 45 45 Aac
KAX-70 49 70 Aac
KAX-90 59 90 Aac
KBH-50 35 50 Aac
KBH-70 49 70 Aac
KBH-90B 46 90 Aac
To Order
(Specify Model Number)
NOMINAL
MODEL NO. PRICE DESCRIPTION RATING
SSR240AC10 $31 10 A
SSR240AC25 31 ac 25 A
SSR240AC45 35 Control Signal 45 A
SSR240AC75 96 (280 Vac line) 75 A
SSR240AC90 114 90 A
SSR240DC10 29 10 A
SSR240DC25 29 dc 25 A
SSR240DC45 33 Control Signal 45 A
SSR240DC75 91 (280 Vac line) 75 A
SSR240DC90 118 90 A
SSR440AC50 108 ac 50 A
SSR440AC75 118 Control Signal 75 A
SSR440AC90 137 (440 Vac line) 90 A
SSR440DC50 91 dc 45 A
SSR440DC75 109 Control Signal 75 A
SSR440DC90 118 (440 Vac line) 90 A
FHS-1 13 Finned 2°C/W
FHS-2 17 Heat Sink 1.2°C/W
FHS-6 21 0.7°C/W
Fuse Blocks
To Order
(Specify Model Number)
MODEL NO. PRICE COMPATIBLE FUSE
FB-1 $11 KAX-10, KAX-25
FB-2 20 KAX-10, KAX-25
FB-3 32 KAX-10, KAX-25
BS-101 46 KAX-45, KAX-75,
KAX-90,
KBH (all models)
Shown smaller
than actual size
MOST POPULAR MODELS HIGHLIGHTED
900
750
600
450
150
0
SURGE CURRENT (AMPS PEAK)
1 (0.0167) 10 (0.167) 100 (1.67) 1000 (16.7)
NUMBER OF CYCLES (SECONDS)
300
500
400
300
200
100
0
SURGE CURRENT (AMPS PEAK)
1 (0.0167) 10 (0.167) 100 (1.67) 1000 (16.7)
NUMBER OF CYCLES (SECONDS)
750
600
450
300
150
0
SURGE CURRENT (AMPS PEAK)
1 (0.0167) 10 (0.167) 100 (1.67) 1000 (16.7)
NUMBER OF CYCLES (SECONDS)
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