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Solid State Relays with AC or DC Control Inputs

SSRL240 and SSRL660 Series

Solid State Relays - order online | SSRL240 and SSRL660 Series

Solid State Relays - order online

£33.01 SSRL240DC25

PLACE ORDER
  • Current Ratings to 100 Amps
  • Multi-Million Cycle Life
  • Compatible with Temperature Controllers
  • Solid-State, SCR Design
  • Zero Voltage Switching
  • Control ac Lines to 660 Vac
  • ac and dc Control Signal Models
  • LED Input Status Indicator
Industrial pH Instrumentation and Electrodes - View related products

Description

The SSRL series of solid state relays are used to control large resistance heaters in conjunction with 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.

Common Specifications
Operating Temperature: -20 to 80°C (-5 to 175°F)
Storage Temperature:-40 to 80°C (-40 to 175°F)
Isolation: 4000 Vrms, input to output; 2500 Vrms 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

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. It is essential that a properly rated, fast blowing I2T fuse be installed to protect the load circuit.

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.

All SSRL series relays come with a thermally conductive pad mounted on the baseplate. This will significantly improve the thermal conductivity between the heat sink and SSR baseplate. It is also suggested that 10-inch-pounds of torque be used on the SSR mounting screws.





Output Specifications for Vac and Vdc Input Models
Specifications10 Amp25 Amp50 Amp75 Amp100 Amp
Max On State Current10 A25 A50 A75 A100 A
Max On State Current100 mA
Max 1-Cycle Surge150 A300 A750 A1000 A1200 A
Max 1 sec Surge30 A75 A150 A225 A300 A
12T (60 Hz), A2sec416937245850006000


SSR240 Series Electrical Specifications
 Input-Control SignalOutput
Model No.TypeControl
Signal
Voltage		Control
Signal
Turn-On		Control
Signal
Turn-Off		Max
Input
Current		Peak
Voltage*
(60 Sec. Max.)
SSRL240AC10
SSRL240AC25
SSRL240AC50
SSRL240AC75
SSRL240AC100		ac
Control
Signal		90 to 280 Vac90 Vac10 Vac10 mA800 V
SSRL240DC10
SSRL240DC25
SSRL240DC50
SSRL240DC75
SSRL240DC100		dc
Control
Signal		3 to 32 Vdc3 Vdc1 Vdc14 mA800 V
SSRL660AC50
SSRL660AC75
SSRL660AC100		ac
Control
Signal		90 to 280 Vac90 Vac10 Vac10 mA1200 V
SSRL660DC50
SSRL660DC75
SSRL660DC100		dc
Control
Signal		4 to 32 Vdc4 Vdc1 Vdc14 mA1200 V
*Transients above table value should be suppressed.

SSR240 Series Output-Vac Load Specifications
Model No.Nominal
ac Line
Voltage		Nominal
Load
Current		Max.
Contact
Voltage Drop		Max. Off-State Leakage
(25°C max. ambient)
120 Vac240 Vac440 Vac
SSRL240AC10
SSRL240AC25
SSRL240AC50
SSRL240AC75
SSRL240AC100		24 to 280 Vac10 A
25 A
50 A
75 A
100 A		1.6 V0.1 mA0.1 mAN/A
SSRL240DC10
SSRL240DC25
SSRL240DC50
SSRL240DC75
SSRL240DC100		24 to 280 Vac10 A
25 A
50 A
75 A
100 A		1.6 V0.1 mA0.1 mAN/A
SSRL660AC50
SSRL660AC75
SSRL660AC100		48 to 660 Vac50 A
75 A
100A		1.6 V0.25 mA0.25 mA0.25 mA
SSRL660DC50
SSRL660DC75
SSRL660DC100		48 to 660 Vac50 A
75 A
100 A		1.6 V0.25 mA0.25 mA0.25 mA
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Part Number/ Desc.
Qty
Description
AC Controlled SSR's
Click to expand/minimize a list of what others bought with theSSRL240AC10
SSRL240AC10
£31.89
Availability: 2 weeks
 
ac Control Signal(24 to 280Vac line) 10 A Nominal rating
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SSRL240AC25
£37.86
Availability: 2 weeks
 
ac Control Signal(24 to 280Vac line) 25 A Nominal rating
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SSRL240AC50
£54.36
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ac Control Signal (24 to 280Vac line) 50 A Nominal rating
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SSRL240AC75
£81.40
Availability: 2 weeks
 
ac Control Signal (24 to 280Vac line)75 A Nominal rating
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SSRL240AC100
£90.02
Availability: 2 weeks
 
ac Control Signal (24 to 280Vac line) 100 A Nominal rating
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SSRL660AC50
£60.33
Availability: 2 weeks
 
ac Control Signal (48 to 660 Vac line) 50 A Nominal rating
  
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ac Control Signal (48 to 660 Vac line)75 A Nominal rating
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SSRL660AC100
£95.74
Availability: 2 weeks
 
ac Control Signal (48 to 660 Vac line) 100 A Nominal rating
DC Controlled SSR's
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SSRL240DC10
£28.36
Availability: In Stock
 
dc Control Signal (24 to 280 Vac line) 10 A Nominal rating
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SSRL240DC25
£33.01
Availability: In Stock
 
dc Control Signal (24 to 280 Vac line) 25 A Nominal rating
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SSRL240DC50
£46.11
Availability: In Stock
 
dc Control Signal (24 to 280 Vac line) 50 A Nominal rating
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SSRL240DC75
£76.84
Availability: 2 weeks
 
dc Control Signal (24 to 280 Vac line) 75 A Nominal rating
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SSRL240DC100
£85.89
Availability: 2 weeks
 
dc Control Signal (24 to 280 Vac line) 100 A Nominal rating
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SSRL660DC50
£56.64
Availability: 2 weeks
 
dc Control Signal (48 to 660 Vac line) 50 A Nominal rating
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SSRL660DC75
£81.40
Availability: 2 weeks
 
dc Control Signal (48 to 660 Vac line) 75 A Nominal rating
Accessories
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FHS-1
£25.75
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Finned Heat Sink 2°C/W
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FHS-2
£28.17
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Finned Heat Sink 1.2°C/W
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FHS-6
£34.89
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Finned Heat Sink .7°C/W
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£63.47
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Fuse, 10 A 14 x 51 mm (0.6 x 2")
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KAX-25
£55.19
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£84.58
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Fuse, 50 A 21 x 81 mm (0.8 x 3.2")
  
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Fuse, 50 A 18 x 81 mm (0.7 x 3.2")
  
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£123.93
Availability: 20 weeks
 
Fuse, 70 A 19 x 92 mm (0.7 x 3.6")
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FB-1
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Fuse block for single fuse
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Fuse block for 2 fuses
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Fuse block for 3 fuses
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Fuse block for KAX-50, KAX-70, KAX-100, KBH fuses
  
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Shunt resistor, 2000 ohms, 12 watts
  
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Shunt resistor, 2000 ohms, 50 watts
  
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Shunt resistor, 1500 ohms, 50 watts
† All amounts shown in EUR, GBP, or USD
 Note: All SSRL Series come with thermally conducting pad. Reference SSR330 Series for additional heat sinks.
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