CS3P-40P TRIAC Equivalent & Substitute Parts

Part Overview

The CS3P-40P is a 40A 1000V TRIAC manufactured by Central Semiconductor Corp in TO-3 packaging. This component is classified as obsolete, making it necessary to identify functionally equivalent alternatives for new designs and ongoing maintenance applications. TRIACs in this voltage and current class are used in AC power control applications including motor speed control, lighting dimmers, and industrial switching circuits.

Substiute Parts

CS3P-40P

Central Semiconductor CorpIn Stock: 929CS3P-40P Datasheet

Current PartRFQ

CLA80MT1200NHR

IXYSIn Stock: 1015CLA80MT1200NHR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CLA80MT1200NHR qualifies as a functional substitute based on the following electrical parameters:

Voltage Rating: The substitute operates at 1.2 kV off-state voltage, which exceeds the 1000V requirement of the original part. This provides adequate voltage margin for the same application class.

Current Rating: The substitute provides 88A on-state current (RMS maximum), which exceeds the 40A specification of the original part. This allows the substitute to handle the same load conditions with additional capacity.

Configuration: Both parts are single-configuration TRIACs suitable for AC power control applications.

Compliance & Status: The substitute is active product status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The CLA80MT1200NHR is suitable as a substitute for the CS3P-40P based on electrical parameter compatibility. The substitute exceeds the voltage and current ratings of the original part, providing adequate performance margin for equivalent AC power control applications.

The primary consideration is packaging transition from TO-3 to TO-247-3 (ISO247). This requires PCB layout modification and may affect thermal management characteristics. The TO-247-3 package is a standard through-hole format widely used in industrial and commercial applications.

The substitute maintains active product status with current manufacturing support and regulatory compliance (ROHS3, REACH unaffected), ensuring long-term component availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the CLA80MT1200NHR directly replace the CS3P-40P without circuit modifications?

A: Electrical substitution is valid based on voltage and current ratings. However, the packaging change from TO-3 to TO-247-3 requires PCB layout modification. Thermal management characteristics may differ due to package geometry differences.

Q: What is the significance of the higher current rating (88A vs 40A) in the substitute?

A: The higher current rating provides additional capacity margin for the same application. This does not affect compatibility; the substitute can safely handle loads designed for the original 40A part.

Q: Does the voltage increase from 1000V to 1.2 kV affect circuit operation?

A: No. The higher voltage rating of the substitute provides additional voltage margin and is fully compatible with 1000V application requirements.

Q: Why is packaging transition important?

A: TO-3 and TO-247-3 have different physical dimensions, lead configurations, and mounting requirements. PCB redesign is necessary to accommodate the new package footprint and ensure proper thermal dissipation.

Q: What is the availability status of the substitute?

A: The CLA80MT1200NHR is active product status manufactured by IXYS with current inventory availability. The original CS3P-40P is obsolete and no longer in production.