High Reliability Solid State Relays

SSRL240 and SSRL660 Series

High Performance Solid State Relays SSR | Omega Engineering

^AUD67.95 SSRL240DC25

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Solid State Relays SSR Rarted 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

Temperature and Process Controllers and Power Switching Devices - View related products

Description

The Omega's 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

Specifications	10 Amp	25 Amp	50 Amp	75 Amp	100 Amp
Max On State Current	10 A	25 A	50 A	75 A	100 A
Max On State Current	100 mA
Max 1-Cycle Surge	150 A	300 A	750 A	1000 A	1200 A
Max 1 sec Surge	30 A	75 A	150 A	225 A	300 A
1²T (60 Hz), A²sec	416	937	2458	5000	6000

SSR240 Series Electrical Specifications

			Input-Control Signal			Output
Model No.	Type	Control 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 Vac	90 Vac	10 Vac	10 mA	800 V
SSRL240DC10 SSRL240DC25 SSRL240DC50 SSRL240DC75 SSRL240DC100	dc Control Signal	3 to 32 Vdc	3 Vdc	1 Vdc	14 mA	800 V
SSRL660AC50 SSRL660AC75 SSRL660AC100	ac Control Signal	90 to 280 Vac	90 Vac	10 Vac	10 mA	1200 V
SSRL660DC50 SSRL660DC75 SSRL660DC100	dc Control Signal	4 to 32 Vdc	4 Vdc	1 Vdc	14 mA	1200 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)
Model No.	Nominal ac Line Voltage	Nominal Load Current	Max. Contact Voltage Drop	120 Vac	240 Vac	440 Vac
SSRL240AC10 SSRL240AC25 SSRL240AC50 SSRL240AC75 SSRL240AC100	24 to 280 Vac	10 A 25 A 50 A 75 A 100 A	1.6 V	0.1 mA	0.1 mA	N/A
SSRL240DC10 SSRL240DC25 SSRL240DC50 SSRL240DC75 SSRL240DC100	24 to 280 Vac	10 A 25 A 50 A 75 A 100 A	1.6 V	0.1 mA	0.1 mA	N/A
SSRL660AC50 SSRL660AC75 SSRL660AC100	48 to 660 Vac	50 A 75 A 100A	1.6 V	0.25 mA	0.25 mA	0.25 mA
SSRL660DC50 SSRL660DC75 SSRL660DC100	48 to 660 Vac	50 A 75 A 100 A	1.6 V	0.25 mA	0.25 mA	0.25 mA

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Part Number/ Desc.

Qty

Description

SSRL240AC10

AUD65.56

Availability: 1 week

ac Control Signal(280Vac line) 10 A Nominal rating

SSRL240AC25

AUD81.84

Availability: 1 week

ac Control Signal(280Vac line) 25 A Nominal rating

SSRL240AC50

AUD100.72

Availability: 1 week

ac Control Signal (280Vac line) 50 A Nominal rating

SSRL240AC75

AUD175.00

Availability: 1 week

ac Control Signal (280Vac line)75 A Nominal rating

SSRL240AC100

AUD194.00

Availability: 1 week

ac Control Signal (280Vac line) 100 A Nominal rating

SSRL240DC10

AUD57.81

Availability: 1 week

dc Control Signal (280 Vac line) 10 A Nominal rating

SSRL240DC25

AUD67.95

Availability: 8 weeks

dc Control Signal (280 Vac line) 25 A Nominal rating

SSRL240DC50

AUD99.46

Availability: 1 week

dc Control Signal (280 Vac line) 50 A Nominal rating

SSRL240DC75

AUD166.18

Availability: 1 week

dc Control Signal (280 Vac line) 75 A Nominal rating

SSRL240DC100

AUD185.00

Availability: 1 week

dc Control Signal (280 Vac line) 100 A Nominal rating

SSRL660AC50

AUD129.68

Availability: 1 week

ac Control Signal (660 Vac line) 50 A Nominal rating

SSRL660AC75

Consult Sales

Availability:

ac Control Signal (660 Vac line)75 A Nominal rating

SSRL660AC100

AUD206.00

Availability: 1 week

ac Control Signal (660 Vac line) 100 A Nominal rating

SSRL660DC50

AUD115.63

Availability: 1 week

dc Control Signal (660 Vac line) 50 A Nominal rating

SSRL660DC75

AUD175.00

Availability: 1 week

dc Control Signal (660 Vac line) 75 A Nominal rating

SSRL660DC100

Consult Sales

Availability:

dc Control Signal (660 Vac line) 100 A Nominal rating

Heat Sinks

FHS-1

AUD54.22

Availability: 1 week

Finned Heat Sink 2°C/W

FHS-2

AUD62.95

Availability: 1 week

Finned Heat Sink 1.2°C/W

FHS-6

AUD67.93

Availability: 1 week

Finned Heat Sink .7°C/W

Fuses

KAX-10

AUD129.68

Availability: 1 week

10 A 14 x 51 mm (0.6 x 2')

KAX-25

AUD112.05

Availability: 1 week

25 A 14 x 51 mm (0.6 x 2')

KAX-30

AUD181.00

Availability: 1 week

30 A 14 x 51 mm (0.6 x 2')

KAX-50

AUD326.18

Availability: 1 week

50 A 21 x 81 mm (0.8 x 3.2')

KBH-50

AUD288.00

Availability: 1 week

50 A 18 x 81 mm (0.7 x 3.2')

KBH-70

AUD265.52

Availability: 19 weeks

70 A 19 x 92 mm (0.7 x 3.6')

Fuse Holders

FB-1

Consult Sales

Availability:

Single fuse, for KAX-10, KAX-25, KAX-30

FB-2

Consult Sales

Availability:

Two fuse, for KAX-10, KAX-25, KAX-30

FB-3

Consult Sales

Availability:

Three fuse, for KAX-10, KAX-25, KAX-30

BS-101

AUD640.00

Availability: 7 weeks

Single fuse, for KAX-50, KAX-70, KAX-100, KBH (all models)

Shunt Resistors for Controllers with AC SSR (Triac) Output

SSRR20-12

Consult Sales

Availability:

2000 ohms, 12 watts

SSRR20-50

AUD22.03

Availability: 1 week

2000 ohms, 50 watts

SSRR15-12

Consult Sales

Availability:

1500 ohms, 12 watts

SSRR15-50

AUD20.25

Availability: 1 week

1500 ohms, 50 watts

† All amounts shown in AUD
Note: All SSRL Series come with thermally conducting pad. Reference SSR330 Series for additional heat sinks.
Ordering Example: (1) SSRL240DC25 Solid state relay, AUD67.95

Part Number Builder

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SSRL

Option Descriptions:

(1) Nominal AC Line Voltage Range select from:
240 for 24 to 280 Vac
660 for 48 to 660 Vac

(2) Type select from:
AC for AC control signal
DC for DC control signal

(3) Nominal Load Current select from:
10 for 10 AMP
25 for 25 AMP
50 for 50 AMP
75 for 75 AMP
100 for 100 AMP

Note: All combinations may not be valid, check spec sheet for valid part numbers.