Omega Products SSR330AC75 User Manual
Solid State Relays
AC/DC Input; 10, 25, 40, 75 A, 330 Vac
Output; 50 and 75 A, 660 Vac Output
SSR330DC10
shown actual size.
SSR330 Series
U Optically Isolated
U LED Status Indicator
U Clear Plastic Safety
Cover Included
U 4000 Volt Isolation
U Zero Voltage Turn-On
U Built-In Snubber
U High Surge Capability
U 100% Tested at Rated
Current
OMEGA’s SSR330 and SSR660
Series solid state relays are singlepole, normally open switching
devices with no moving parts,
capable of millions of cycles of
operation. By applying a control
signal, the SSR switches “on” the
AC load current, just as moving
contacts do on a mechanical
contactor.
“Switching” takes place at the
0 voltage crossover point of the
alternating current cycle. Because
of this, no appreciable noise is
generated. Both DC and AC input
control signal models are available.
DC Control Specifications
Line Load Current Min Control Max Control Release
Model Voltage Range Voltage and Voltage and Voltage
Number Range (Vac) (Arms) Current Draw Current Draw (Vdc)
SSR330DC10 24 to 330 0.05 to 10 4 Vdc/5.4 mA 32 Vdc/10 mA 1
SSR330DC25 24 to 330 0.10 to 25 4 Vdc/5.4 mA 32 Vdc/10 mA 1
SSR330DC50 24 to 330 0.10 to 50 4 Vdc/3.5 mA 32 Vdc/8 mA 1
SSR330DC75 24 to 330 0.10 to 75 4 Vdc/3.5 mA 32 Vdc/8 mA 1
SSR660DC50 24 to 660 0.10 to 50 4 Vdc/3.5 mA 32 Vdc/8 mA 1
SSR660DC75 24 to 660 0.10 to 75 4 Vdc/3.5 mA 32 Vdc/8 mA 1
AC Control Specifications
Line Load Current Min Control Max Control Release
Model Voltage Range Voltage and Voltage and Voltage
Number Range (Vac) (Arms) Current Draw Current Draw (Vac)
SSR330AC10 24 to 330 0.05 to 10 100 Vac/2.5 mA 280 Vac/19 mA 20
SSR330AC25 24 to 330 0.10 to 2 5 100 Vac/2.5 mA 280 Vac/19 mA 20
SSR330AC50 24 to 330 0.10 to 5 0 100 Vac/2.5 mA 280 Vac/19 mA 20
SSR330AC75 24 to 330 0.15 to 7 5 100 Vac/2.5 mA 280 Vac/19 mA 20
SSR660AC50 24 to 660 0.15 to 5 0 100 Vac/2.5 mA 280 Vac/19 mA 20
SSR660AC75 24 to 660 0.15 to 7 5 100 Vac/2.5 mA 280 Vac/19 mA 20
Safety Cover
Included!
Derating Curves
10 and 25 A (330 Vac)
40 and 75 A (330 Vac)
8
P-109
50 and 75 A (660 Vac)
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 vertically on a finned heat
sink or an aluminum plate. An SSR
should be located where the ambient
temperature is relatively low, since the
current switching rating is lowered as
temperature increases. Refer to the
thermal derating curves shown on the
previous page to determine the proper
heat sink required.
Solid state relay cycle life is many
times that of an equivalently priced
mechanical contactor. OMEGA
®
recommends solid state relays for
use with proportional temperature
controllers and other applications
where long life and solid state
reliability are needed.
In contrasting solid state relays with
mechanical contactors, it should be
noted that a solid state relay is more
prone to failure due to overload and
improper initial wiring. Solid state
relays can fail, contact closed, on
overloaded circuits.
®
OMEGA
finned heat sinks (FHS)
are aluminum fabrications and come
complete with tapped mounting holes
and screws. Refer to thermal derating
curves for heat sink 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
the thermal conductivity. It is also
suggested that 10”/lb of torque be
used on the SSR mounting screws.
FHS-7 Finned Heat Sink
Dimensions: mm (inch)
140 (5.500)
114 (4.500)
48
(1.875)
112
13
(0.50)
(4.40) max
33
(1.312)
FHS-8 Finned Heat Sink
76 (3.00)
13
(0.50)
51 (2.00)
112
(4.40) max
14
(0.562)
48
(1.875)
7
(0.27)
8 to 32
Tap. Typical
2
(0.093) Typical
SSR330DC10
shown smaller
than actual size.
67
(2.630)
7
(0.27)
8 to 32
Tap Typical
2
(0.093)
67
(2.630)
Dimensions: mm (inch)
121
121
(4.750)
Safety Cover
Included!
(4.750).
SSR330 Series
4.8 (0.19)
12
47.6
(1.875)
4.40 (0.172)
Dia. 2 places
44.5 (1.75)
27.9
(1.10)
13.5
(0.53)
25.4 (1.0)
3 +4 -
8 - 32
Thread
7.6
(0.3)
43.2
(1.70)
57.1
(2.25)
6 - 32
Thread
Case temperature
reference
point
22.9
(0.90)
To Order Visit omega.com/ssr330_660 for Pricing and Details
Model No. Price Description Nominal Rating
SSR330DC10 $21 10 A
SSR330DC25 26 25 A
SSR330DC50 37 50 A
DC control
signal
(330 Vac line)
SSR330DC75 61 75 A
SSR660DC50 45 50 A
SSR660DC75 65 75 A
DC control signal
(660 Vac line)
SSR330AC10 25 10 A
SSR330AC25 30 25 A
SSR330AC50 40 50 A
AC control signal
(330 Vac line)
SSR330AC75 65 75 A
SSR660AC50 48 50 A
SSR660AC75 69 75 A
FHS-7 30 1.0˚C/W
FHS-8 20 1.5˚C/W
Comes complete with operator’s manual and safety cover.
Ordering Example: SSR330DC25, DC control signal, 25 A solid-state relay.
AC control signal
(660 Vac line)
Finned
heat sink
P-110
P
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