RTAC31S12M25FS Rotary Switch - Equivalent & Substitute Parts

Part Overview

The RTAC31S12M25FS is a 12-position single-pole rotary switch manufactured by C&K, designed for panel-mount applications with a 60 VAC/DC rating and 150mA current capacity. This component operates with non-shorting (BBM) contact timing and features a flatted 6mm diameter actuator with 25mm length. The product is currently obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications where continued functionality is required.

Substiute Parts

RTAC31S12M25FS

C&KIn Stock: 684RTAC31S12M25FS Datasheet

Current PartRFQ

A11215RNZQ

C&KIn Stock: 941A11215RNZQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RTAC31S12M25FS is determined by the following critical parameters:

Mandatory Matching Criteria:

• Number of Positions: 12
• Circuit Configuration: SP12T
• Contact Timing: Non-Shorting (BBM)
• Mounting Type: Panel Mount
• Termination Style: Solder Lug
• Angle of Throw: 30°

Allowable Parameter Variations:

• Current Rating: Substitute must equal or exceed 150mA (AC/DC)
• Voltage Rating (AC/DC): Substitute must equal or exceed 60V
• Actuator Diameter: Minor variations acceptable if mechanical fit is maintained
• Actuator Length: Variations acceptable within panel depth constraints
• Panel Cutout Diameter: Variations acceptable within standard panel mounting tolerances
• Contact Material and Finish: Variations acceptable if electrical performance is maintained
• Compliance Status: Active or Obsolete products acceptable; RoHS compliance preferred

The A11215RNZQ meets all mandatory matching criteria and exceeds electrical performance requirements, qualifying as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The A11215RNZQ is a qualified substitute for the RTAC31S12M25FS based on the following engineering factors:

Functional Equivalence: Both components share identical circuit configuration (SP12T), contact timing (Non-Shorting BBM), position count (12), and mechanical interface (panel mount with solder lug termination). The substitute maintains full functional compatibility for applications requiring 12-position rotary switching.

Electrical Performance: The A11215RNZQ exceeds the electrical requirements of the original component. With AC current rating of 2.5A versus 150mA, DC current rating of 350mA versus 150mA, and voltage ratings of 125V versus 60V, the substitute provides enhanced electrical capacity. Applications operating within the original 60V/150mA specification will operate safely with the substitute.

Compliance Status: The RTAC31S12M25FS is RoHS Compliant; the A11215RNZQ is ROHS3 Compliant, meeting current regulatory standards. The substitute is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete original component.

Mechanical Considerations: The A11215RNZQ has a longer actuator length (38.10mm versus 25.00mm) and requires additional depth behind panel (20.83mm versus 18.70mm). Panel cutout diameter is slightly smaller (9.80mm versus 10.20mm). These dimensional differences require verification against specific panel mounting constraints in the target application.

Material Upgrade: The substitute features silver (Ag) contact material versus brass in the original, providing improved electrical conductivity and contact reliability.

Frequently Asked Questions (FAQ)

Q: Can the A11215RNZQ directly replace the RTAC31S12M25FS in all applications?

A: Functional and electrical compatibility is confirmed. However, mechanical fit must be verified. The substitute requires 2.13mm additional depth behind the panel and a smaller panel cutout diameter (9.80mm versus 10.20mm). Existing panel mounting holes and clearances must accommodate these dimensional differences.

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

A: Both are 12-position SP12T non-shorting rotary switches with panel mount configuration. The primary differences are: (1) electrical ratings—the substitute exceeds the original in current and voltage capacity; (2) actuator length—the substitute is 13.10mm longer; (3) panel depth requirement—the substitute requires 2.13mm additional clearance; (4) contact material—the substitute uses silver versus brass; (5) product status—the substitute is active production versus obsolete.

Q: Are there any compliance concerns with substitution?

A: No. Both components are RoHS compliant. The substitute meets ROHS3, the current RoHS standard. Both carry EAR99 ECCN classification and identical HTSUS codes, indicating regulatory equivalence.

Q: What should be verified before implementing this substitute?

A: Verify panel mounting dimensions, specifically: (1) available depth behind panel must accommodate 20.83mm; (2) panel cutout must be resized to 9.80mm diameter if the original 10.20mm hole is larger; (3) actuator length of 38.10mm must not interfere with adjacent components or panel structure; (4) electrical circuit must operate within the substitute's 125V/2.5A AC or 350mA DC ratings.

Q: Is the A11215RNZQ the only available substitute?

A: Based on the provided substitute list, the A11215RNZQ is the identified equivalent. Both components are manufactured by C&K and share identical circuit topology and contact characteristics.

Q: What is the impact of the different contact material (silver versus brass)?

A: Silver contact material in the substitute provides superior electrical conductivity and contact reliability compared to brass. This represents a performance improvement with no negative impact on applications designed for the original component.