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Solid State Relays High Reliability, Vdc Input/Vac Output, Vac Input/Vac Output

SSRL240 and SSRL660 Series

SSRL240 and SSRL660 Series:Solid State Relays High Reliability, Vdc Input/Vac Output, Vac Input/Vac Output

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^$ 26.00 SSRL240DC25

•	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
•	Thermal Conductive Pad Included

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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

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

To Order (Specify Model Number)

Part Number	Availability	Price	Description	RoHS	Qty.

SSRL240AC10		$25.00	ac Control Signal(24 to 280Vac line) 10 A Nominal rating		Qty
SSRL240AC25		$30.00	ac Control Signal(24 to 280Vac line) 25 A Nominal rating		Qty
SSRL240AC50		$40.00	ac Control Signal (24 to 280Vac line) 50 A Nominal rating		Qty
SSRL240AC75		$65.00	ac Control Signal (24 to 280Vac line)75 A Nominal rating		Qty
SSRL240AC100		$80.00	ac Control Signal (24 to 280Vac line) 100 A Nominal rating		Qty
SSRL240DC10		$21.00	dc Control Signal (24 to 280 Vac line) 10 A Nominal rating		Qty
SSRL240DC25		$26.00	dc Control Signal (24 to 280 Vac line) 25 A Nominal rating		Qty
SSRL240DC50		$37.00	dc Control Signal (24 to 280 Vac line) 50 A Nominal rating		Qty
SSRL240DC75		$61.00	dc Control Signal (24 to 280 Vac line) 75 A Nominal rating		Qty
SSRL240DC100		$76.00	dc Control Signal (24 to 280 Vac line) 100 A Nominal rating		Qty
SSRL660AC75		$69.00	ac Control Signal (48 to 660 Vac line)75 A Nominal rating		Qty
SSRL660AC100		$84.00	ac Control Signal (48 to 660 Vac line) 100 A Nominal rating		Qty
SSRL660DC50		$45.00	dc Control Signal (48 to 660 Vac line) 50 A Nominal rating		Qty
SSRL660DC75		$65.00	dc Control Signal (48 to 660 Vac line) 75 A Nominal rating		Qty
SSRL660DC100		$85.00	dc Control Signal (48 to 660 Vac line) 100 A Nominal rating		Qty

Heat Sinks

FHS-1		$17.00	Finned Heat Sink 2°C/W		Qty
FHS-2		$17.00	Finned Heat Sink 1.2°C/W		Qty
FHS-6		$21.00	Finned Heat Sink .7°C/W		Qty

Fuses

KAX-10		$30.00	10 A 14 x 51 mm (0.6 x 2")		Qty
KAX-25		$30.00	25 A 14 x 51 mm (0.6 x 2")		Qty
KAX-30		$50.00	30 A 14 x 51 mm (0.6 x 2")		Qty
KAX-50	2 Weeks	$65.00	50 A 21 x 81 mm (0.8 x 3.2")		Qty
KAX-100		Consult sales	100 A 31 x 92 mm (1.2 x 3.6")		Qty
KBH-50		$45.00	50 A 18 x 81 mm (0.7 x 3.2")		Qty
KBH-70		$55.00	70 A 19 x 92 mm (0.7 x 3.6")		Qty

Fuse Holders

FB-1		$20.00	Single fuse, for KAX-10, KAX-25, KAX-30		Qty
FB-2		$65.00	Two fuse, for KAX-10, KAX-25, KAX-30		Qty
FB-3		$70.00	Three fuse, for KAX-10, KAX-25, KAX-30		Qty
BS-101		$70.00	Single fuse, for KAX-50, KAX-70, KAX-100, KBH (all models)		Qty

Shunt Resistors for Controllers with AC SSR (Triac) Output

SSRR20-12		$8.00	2000 ohms, 12 watts		Qty
SSRR20-50		$10.00	2000 ohms, 50 watts		Qty
SSRR15-12		$6.00	1500 ohms, 12 watts		Qty
SSRR15-50		$9.00	1500 ohms, 50 watts		Qty

† All dollar amounts on this site are shown in US currency.

Note: All SSRL Series come with thermally conducting pad. Reference SSR330 Series for additional heat sinks.
Ordering Example: (1) SSRL240DC25 Solid state relay = $26

Keywords:SSR240A10 SSR240A25SSR240A45 SSR240AC10 SSR240AC25 SSR240AC45 SSR240AC75 SSR240AC90 SSR240D10 SSR240D25 SSR240AC90 SSR240D10 SSR240D25 SSR240D45 SSR240DC10 SSR240DC25 SSR240DC45 SSR240DC75 SSR240DC90