CS3P-40N TRIAC Equivalent & Substitute Parts

Part Overview

The CS3P-40N is a 40A 800V TRIAC manufactured by Central Semiconductor Corp in TO-3 packaging. This component is classified as obsolete and no longer in active production. Due to its discontinued status, sourcing original units becomes increasingly difficult. Identifying qualified substitute components with equivalent electrical and mechanical characteristics is essential for system redesign, maintenance, and production continuity.

Substiute Parts

CS3P-40N

Central Semiconductor CorpIn Stock: 926CS3P-40N Datasheet

Current PartRFQ

BTA40-800B

STMicroelectronicsIn Stock: 1843BTA40-800B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS3P-40N is based on the following critical electrical and mechanical parameters:

• Voltage Rating (Off State): 800V minimum
• Current Rating (On State RMS): 40A minimum
• Configuration: Single TRIAC
• Mounting Type: Chassis Mount capability
• Package Type: Insulated package suitable for TO-3 form factor replacement

The BTA40-800B qualifies as a direct substitute based on matching voltage and current specifications. Both components operate at 800V off-state voltage and 40A on-state current, with compatible gate trigger and hold current characteristics. The BTA40-800B is available in RD91-3 insulated packaging, which provides equivalent thermal and electrical isolation properties required for chassis mount applications.

Parameter Comparison

Engineering Selection Recommendations

The BTA40-800B is the qualified substitute for the CS3P-40N based on the following criteria:

• Electrical Equivalence: Both components operate at identical voltage (800V) and current (40A) ratings, meeting the core functional requirements.
• Active Product Status: The BTA40-800B is in active production by STMicroelectronics, ensuring long-term availability and supply chain stability.
• Compliance: The BTA40-800B carries ROHS3 compliance and EAR99 ECCN classification, meeting current regulatory requirements.
• Packaging Compatibility: The RD91-3 insulated package provides equivalent thermal management and electrical isolation for chassis mount applications.
• Inventory Availability: 1822 units are currently in stock, supporting immediate procurement needs.

Frequently Asked Questions (FAQ)

Q: Can the BTA40-800B directly replace the CS3P-40N in existing designs?

A: Yes. Both components share identical voltage (800V) and current (40A) specifications. The RD91-3 insulated package provides equivalent electrical isolation and thermal characteristics for chassis mount applications. Physical mounting geometry should be verified during integration.

Q: What are the key electrical parameters that determine substitution compatibility?

A: The primary parameters are off-state voltage (800V) and on-state RMS current (40A). Gate trigger voltage (1.3V max), gate trigger current (50mA max), and hold current (80mA max) on the BTA40-800B are within typical operating ranges for TRIAC applications.

Q: Does the BTA40-800B meet current regulatory requirements?

A: Yes. The BTA40-800B is ROHS3 compliant and classified as EAR99 for export control purposes, meeting current environmental and trade regulations.

Q: What is the operating temperature range for the BTA40-800B?

A: The BTA40-800B operates from -40°C to 125°C junction temperature, covering standard industrial and commercial temperature ranges.

Q: Is the RD91-3 package suitable for the same mounting configuration as the TO-3 package?

A: The RD91-3 is an insulated chassis mount package designed for equivalent thermal and electrical isolation. Physical mounting hole patterns and lead configurations should be verified against the original TO-3 design before implementation.

Q: What is the current non-repetitive surge rating for the BTA40-800B?

A: The BTA40-800B is rated for 400A (50Hz) and 420A (60Hz) non-repetitive surge current, providing margin for transient overcurrent conditions.