RTAC33S03M25FS Rotary Switch - Equivalent & Substitute Parts

Part Overview

The RTAC33S03M25FS is a 3-position rotary switch manufactured by C&K, featuring a 3P3T circuit configuration with 150mA (AC/DC) current rating and 60V voltage rating. This component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent substitute parts with compatible electrical and mechanical parameters is necessary for ongoing system maintenance and new design implementations.

Substiute Parts

RTAC33S03M25FS

C&KIn Stock: 1000RTAC33S03M25FS Datasheet

Current PartRFQ

A30305RNZQ

C&KIn Stock: 1058A30305RNZQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RTAC33S03M25FS is determined by the following critical parameters:

• Circuit Configuration: Must be 3P3T (3 poles, 3 throws per deck)
• Number of Positions: Must be 3
• Contact Timing: Must be Non-Shorting (BBM)
• Mounting Type: Must be Panel Mount
• Termination Style: Must be Solder Lug
• Angle of Throw: Must be 30°

A substitute part is considered equivalent when it maintains these core functional parameters. Current and voltage ratings may exceed the original specification, provided the substitute operates within the same electrical envelope and does not introduce incompatibility with the host system.

The A30305RNZQ qualifies as a substitute based on matching circuit configuration (3P3T), position count (3), contact timing (Non-Shorting BBM), mounting type (Panel Mount), termination style (Solder Lug), and angle of throw (30°).

Parameter Comparison

Engineering Selection Recommendations

The A30305RNZQ is the identified substitute for the obsolete RTAC33S03M25FS. Selection of this substitute is supported by the following factors:

Product Status: The A30305RNZQ maintains Active product status, ensuring continued availability and supply chain reliability compared to the Obsolete RTAC33S03M25FS.

Compliance: The A30305RNZQ carries ROHS3 Compliant certification, exceeding the RoHS Compliant status of the original part. Both components are classified under ECCN EAR99 and share the same HTSUS code (8536.50.9020).

Electrical Ratings: The A30305RNZQ provides higher current and voltage ratings (2.5A AC / 350mA DC at 125V) compared to the original specification (150mA AC/DC at 60V). These elevated ratings ensure the substitute can handle the original application requirements without derating.

Functional Equivalence: Both parts maintain identical circuit configuration (3P3T), contact timing (Non-Shorting BBM), mounting type (Panel Mount), and mechanical throw angle (30°), confirming functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the A30305RNZQ directly replace the RTAC33S03M25FS in existing applications?

A: Yes, the A30305RNZQ is functionally equivalent for applications requiring 3-position, 3P3T rotary switching with panel mount configuration and solder lug termination. The higher current and voltage ratings of the substitute do not create incompatibility with circuits designed for the original part's lower ratings.

Q: What is the difference in contact material between these parts?

A: The RTAC33S03M25FS uses brass contacts with silver finish, while the A30305RNZQ uses silver (Ag) contacts with silver finish. Silver contacts provide superior electrical conductivity and lower contact resistance, representing an improvement over the brass contact material.

Q: Are there packaging differences between these parts?

A: The RTAC33S03M25FS is supplied with standard packaging, while the A30305RNZQ is supplied in Tray packaging. Both parts use identical solder lug termination and panel mount configuration, with no functional impact from packaging format differences.

Q: What are the mechanical differences in actuator specifications?

A: The RTAC33S03M25FS features a 6mm diameter flatted actuator with 25mm length, while the A30305RNZQ features a 6.35mm diameter flatted actuator with 12.70mm length. Panel cutout dimensions differ slightly (10.20mm vs 9.80mm), and depth behind panel varies (18.70mm vs 20.83mm). These mechanical differences require verification against the host system's mechanical envelope before implementation.

Q: Is the A30305RNZQ suitable for new designs?

A: Yes. The A30305RNZQ's Active product status and ROHS3 compliance make it suitable for new design implementations. Its higher electrical ratings provide design margin for applications within the original specification envelope.