CF-TB-1AS3-155 Equivalent & Substitute Parts

Part Overview

The CF-TB-1AS3-155 is a toggle switch manufactured by Nidec Components Corporation, configured as a single-pole single-throw (SPST) panel mount switch with on-off functionality. This component is rated for 15A AC at 125V and features a flatted actuator with a 12.00mm length and screw terminal termination. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where this switch type is required.

Key Parameters

Parameter	CF-TB-1AS3-155
Manufacturer	Nidec Components Corporation
Circuit Configuration	SPST
Switch Function	On-Off
Current Rating (AC)	15A
Voltage Rating (AC)	125V
Mounting Type	Panel Mount
Actuator Type	Flatted
Termination Style	Screw Terminal
Panel Cutout Diameter	12.30mm
Bushing Thread	M12 x 1
Operating Temperature Range	-10°C to 65°C
Electrical Life	50,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

The 631NH manufactured by APEM Inc. qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

Circuit configuration: SPST
Switch function: On-Off
Current rating: 15A AC
Mounting type: Panel Mount
Actuator type: Flatted
Termination style: Screw Terminal
Panel cutout diameter: 12.20mm (compatible with 12.30mm specification)
Bushing thread: M12 (0.75 pitch vs. 1.0 pitch on original)
RoHS3 compliance maintained

Substitution Basis: The 631NH maintains functional equivalence through identical circuit topology, current handling capacity, and mounting interface. Both components are panel-mount SPST toggle switches with screw terminals and flatted actuators. The mechanical interface differences (panel cutout diameter variance of 0.10mm and bushing thread pitch difference) fall within standard manufacturing tolerances for this component category and do not prevent direct substitution in typical applications.

Parameter Comparison

Parameter	CF-TB-1AS3-155	631NH	Notes
Manufacturer	Nidec Components Corporation	APEM Inc.	Different manufacturers
Circuit Configuration	SPST	SPST	Identical
Switch Function	On-Off	On-Off	Identical
Current Rating (AC)	15A	15A	Identical
Voltage Rating (AC)	125V	250V	631NH rated higher
Mounting Type	Panel Mount	Panel Mount	Identical
Actuator Type	Flatted	Flatted	Identical
Actuator Length	12.00mm	14.60mm	631NH is 1.50mm longer
Termination Style	Screw Terminal	Screw Terminal	Identical
Panel Cutout Diameter	12.30mm	12.20mm	0.10mm difference
Bushing Thread	M12 x 1	M12 x 0.75	Different pitch
Operating Temperature Range	-10°C to 65°C	-20°C to 55°C	Different ranges
Electrical Life	50,000 Cycles	10,000 Cycles	Original rated higher
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Product Status	Obsolete	Active	631NH currently available

Engineering Selection Recommendations

The 631NH is an active product from APEM Inc. and represents the primary substitute for the obsolete CF-TB-1AS3-155. Selection of the 631NH is supported by:

Maintained ROHS3 compliance for regulatory requirements
Active product status ensuring ongoing availability and supply chain continuity
Electrical equivalence in circuit topology and current handling (15A AC)
Compatible panel mount interface and screw terminal configuration
Higher voltage rating (250V vs. 125V) provides additional safety margin in applications

Design integration of the 631NH requires consideration of the following parameter differences: the 1.50mm longer actuator length may affect panel aesthetics or clearance in confined spaces; the operating temperature range is narrower (-20°C to 55°C vs. -10°C to 65°C); and the electrical life rating is lower (10,000 cycles vs. 50,000 cycles). These differences must be evaluated against specific application requirements before final component selection.

Frequently Asked Questions (FAQ)

Q: Can the 631NH directly replace the CF-TB-1AS3-155 in existing designs?

A: The 631NH is electrically and functionally equivalent for SPST on-off switching at 15A AC. Panel mount compatibility is maintained through M12 bushing threads and similar cutout dimensions. Physical differences in actuator length (1.50mm longer) and operating temperature range must be evaluated for specific applications.

Q: What are the key differences between these two switches?

A: The primary differences are: voltage rating (631NH rated 250V vs. 125V), actuator length (631NH 14.60mm vs. 12.00mm), operating temperature range (631NH -20°C to 55°C vs. -10°C to 65°C), electrical life (631NH 10,000 cycles vs. 50,000 cycles), and bushing thread pitch (631NH M12 x 0.75 vs. M12 x 1.0).

Q: Is the 631NH currently available?

A: Yes, the 631NH is classified as an active product with 832 pieces in stock, ensuring supply availability compared to the obsolete CF-TB-1AS3-155.

Q: Will the panel cutout diameter difference affect installation?

A: The panel cutout diameter difference is 0.10mm (631NH 12.20mm vs. CF-TB-1AS3-155 12.30mm), which falls within standard manufacturing tolerances and does not prevent installation in existing panel cutouts designed for the original component.

Q: What compliance certifications apply to the 631NH?

A: The 631NH maintains ROHS3 compliance and is REACH unaffected, meeting the same regulatory requirements as the original CF-TB-1AS3-155.

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