RTAC31S04M25FS Rotary Switch - Equivalent & Substitute Parts

Part Overview

The RTAC31S04M25FS is a 4-position rotary switch manufactured by C&K, featuring single-pole, four-throw (SP4T) configuration with non-shorting contact timing. This panel-mount component is rated for 150mA at 60 VAC/DC and utilizes a flatted 6mm diameter actuator with 25mm length. The product is currently obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications where continued component availability is required.

Substiute Parts

RTAC31S04M25FS

C&KIn Stock: 1096RTAC31S04M25FS Datasheet

Current PartRFQ

A10415RNZQ

C&KIn Stock: 774A10415RNZQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RTAC31S04M25FS is determined by the following critical parameters:

Functional Requirements (Must Match):

• Number of positions: 4
• Circuit configuration: SP4T
• Contact timing: Non-Shorting (BBM)
• Mounting type: Panel Mount
• Termination style: Solder Lug
• Angle of throw: 30°

Electrical Compatibility (Must Meet or Exceed):

• Current rating: Minimum 150mA
• Voltage rating: Minimum 60 VAC/DC

Mechanical Compatibility (Must Accommodate):

• Actuator type: Flatted configuration
• Panel cutout: Circular aperture compatible with 10.20mm diameter specification
• Depth behind panel: Physical space constraint of 18.70mm

The substitute part A10415RNZQ satisfies all functional requirements and exceeds electrical ratings (2.5A AC / 350mA DC at 125 VAC/DC), providing direct functional replacement capability. Mechanical dimensions require verification for specific panel integration applications.

Parameter Comparison

Engineering Selection Recommendations

The A10415RNZQ provides functional equivalence to the obsolete RTAC31S04M25FS with enhanced electrical performance. Both components are manufactured by C&K and maintain identical circuit configuration (SP4T), contact timing (non-shorting BBM), and mechanical mounting approach (panel mount with solder lug termination).

Electrical Suitability: The A10415RNZQ exceeds the original component's electrical specifications, supporting 2.5A AC and 350mA DC at 125 VAC/DC compared to the RTAC31S04M25FS rating of 150mA at 60 VAC/DC. This provides margin for applications operating within the original voltage and current envelope.

Compliance Status: Both components are RoHS compliant. The A10415RNZQ achieves ROHS3 compliance and maintains active production status, ensuring long-term availability and supply chain continuity.

Mechanical Integration Considerations: Physical differences exist in actuator length (38.10mm versus 25.00mm), panel cutout diameter (9.80mm versus 10.20mm), and depth behind panel (20.83mm versus 18.70mm). These dimensional variations require verification against specific panel cavity and actuator shaft specifications in the target application. The actuator diameter difference (6.35mm versus 6mm) is within typical mechanical tolerance ranges for flatted shaft interfaces.

Contact Material Difference: The A10415RNZQ utilizes silver contact material compared to the brass contacts in the RTAC31S04M25FS. Silver provides superior electrical conductivity and contact reliability, particularly beneficial for low-current switching applications.

Frequently Asked Questions (FAQ)

Q: Can the A10415RNZQ directly replace the RTAC31S04M25FS in all applications?

A: Functional replacement is supported for applications where the electrical requirements (150mA at 60 VAC/DC) fall within the A10415RNZQ's rated capacity. Mechanical integration requires verification of panel cavity dimensions and actuator shaft length compatibility. The longer actuator (38.10mm versus 25.00mm) and increased depth behind panel (20.83mm versus 18.70mm) must be accommodated by the target installation.

Q: What are the key electrical differences between these components?

A: The A10415RNZQ provides higher current capacity (2.5A AC / 350mA DC) and voltage rating (125 VAC/DC) compared to the RTAC31S04M25FS (150mA at 60 VAC/DC). Both maintain identical circuit configuration and contact timing characteristics. Applications operating within the original specifications will function with the substitute component.

Q: Why does the A10415RNZQ have a different panel cutout diameter?

A: The A10415RNZQ specifies a 9.80mm circular cutout compared to the 10.20mm diameter of the RTAC31S04M25FS. This 0.40mm difference reflects design variations between product series. Panel modifications may be required if the existing cavity cannot accommodate the smaller diameter, or if the larger cavity creates excessive clearance with the substitute component's bezel.

Q: Are there contact material compatibility concerns with the silver contacts in the A10415RNZQ?

A: Silver contact material in the A10415RNZQ provides enhanced electrical performance and reliability compared to brass. No compatibility issues arise from this material difference in standard switching applications. The silver finish is identical in both components.

Q: What is the significance of the actuator diameter difference (6mm versus 6.35mm)?

A: The 0.35mm diameter difference between the flatted actuators reflects manufacturing tolerances and design variations. Compatibility depends on the specific shaft or coupling interface in the target application. Verify that the 6.35mm flatted actuator of the A10415RNZQ accommodates the existing shaft or coupling mechanism.

Q: How does the longer actuator length of the A10415RNZQ affect installation?

A: The A10415RNZQ actuator extends 13.10mm further (38.10mm total versus 25.00mm) than the RTAC31S04M25FS. This requires verification that the panel cavity and any mechanical linkages or protective covers accommodate the extended length. Insufficient clearance will prevent proper installation.

Q: Is the A10415RNZQ suitable for new designs or only as a replacement for obsolete components?

A: The A10415RNZQ is actively manufactured and suitable for both new designs and replacement applications. Its active production status ensures supply chain continuity and long-term availability, making it appropriate for applications requiring sustained component sourcing.