CS3P-40M TRIAC Equivalent & Substitute Parts

Part Overview

The CS3P-40M is a TRIAC rated for 40A at 600V in TO-3 packaging, manufactured by Central Semiconductor Corp. This component is classified as obsolete, making it necessary to identify active equivalent parts for new designs and ongoing production requirements. The CS3P-40M functioned as a standard thyristor for AC switching applications requiring 600V blocking capability and 40A on-state current capacity.

Substiute Parts

CS3P-40M

Central Semiconductor CorpIn Stock: 1217CS3P-40M Datasheet

Current PartRFQ

BTA40-600B

STMicroelectronicsIn Stock: 16391BTA40-600B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The BTA40-600B from STMicroelectronics serves as the manufacturer-recommended substitute for the CS3P-40M. Substitution is based on the following critical parameters that must align for functional equivalence:

• Voltage - Off State: 600V
• Current - On State (It (RMS)): 40A
• TRIAC Type: Standard
• Configuration: Single

The BTA40-600B maintains identical voltage and current ratings, ensuring compatibility in AC switching applications. Both components are standard TRIACs with single configuration, making them functionally interchangeable at the electrical level.

Parameter Comparison

Engineering Selection Recommendations

The BTA40-600B is the active equivalent for the obsolete CS3P-40M. Selection of the BTA40-600B is supported by:

• Active product status with full manufacturer support and availability
• ROHS3 compliance for regulatory alignment with current manufacturing standards
• Unlimited moisture sensitivity level (MSL 1) for standard storage and handling conditions
• EAR99 export classification for unrestricted commercial distribution
• Identical electrical ratings (600V, 40A) ensuring direct functional replacement

The transition from CS3P-40M to BTA40-600B requires mechanical accommodation for the package change from TO-3 to RD91-3 (Insulated Chassis Mount). PCB layout and mounting hardware must be evaluated for compatibility with the new package form factor.

Frequently Asked Questions (FAQ)

Q: Can the BTA40-600B directly replace the CS3P-40M without circuit modifications?

A: The BTA40-600B provides electrical equivalence at the 600V, 40A rating level. However, the package change from TO-3 to RD91-3 (Insulated Chassis Mount) requires mechanical redesign of the mounting interface and PCB layout.

Q: What are the critical parameters for TRIAC substitution?

A: Off-state voltage rating, on-state current rating (RMS), TRIAC type (Standard), and configuration (Single) are the primary parameters determining substitution eligibility. The BTA40-600B matches all these criteria with the CS3P-40M.

Q: Is the BTA40-600B suitable for new production designs?

A: Yes. The BTA40-600B is an active product with ROHS3 compliance, making it appropriate for new designs requiring 600V, 40A TRIAC functionality.

Q: What is the difference between TO-3 and RD91-3 packaging?

A: TO-3 is a threaded stud package, while RD91-3 is an insulated chassis mount package. Both are designed for high-current applications but require different mounting hardware and PCB design approaches.

Q: Are there inventory considerations for the CS3P-40M?

A: 1185 pieces of new original CS3P-40M stock are currently available. However, as an obsolete product, no future supply is guaranteed. The BTA40-600B has 16285 pieces in stock with active product status.