P3500ECMCAP Equivalent & Substitute Parts

Part Overview

The P3500ECMCAP is a 320V off-state, 400A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series. This component is designed for transient voltage suppression applications requiring through-hole mounting in TO-226-2 package configuration. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

P3500ECMCAP

Littelfuse Inc.In Stock: 1186P3500ECMCAP Datasheet

Current PartRFQ

P3500ECMCLAP

Littelfuse Inc.In Stock: 999P3500ECMCLAP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3500ECMCAP is determined by electrical and mechanical parameter equivalence. The critical parameters for substitution are:

• Voltage ratings (breakover, off-state, and on-state)
• Peak pulse current specifications (8/20µs and 10/1000µs)
• Hold current (Ih)
• Capacitance
• Package configuration and mounting type
• Number of active elements

The P3500ECMCLAP meets all electrical specifications identically to the main part and maintains the same physical package footprint. The primary distinction is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The P3500ECMCLAP is the direct electrical and mechanical equivalent of the P3500ECMCAP. Both components share identical electrical specifications and package footprints, ensuring pin-for-pin compatibility in existing circuit designs.

Selection between these parts should be based on:

• Product status: P3500ECMCLAP is active and available for new designs, while P3500ECMCAP is obsolete
• Regulatory compliance: P3500ECMCLAP meets ROHS3 compliance requirements, whereas P3500ECMCAP is RoHS non-compliant
• Packaging requirements: P3500ECMCLAP is supplied in Tape & Box format suitable for automated assembly, while P3500ECMCAP is supplied in bulk packaging

For new designs and ongoing production, P3500ECMCLAP is the appropriate selection. For legacy system repairs requiring exact inventory matching, P3500ECMCAP remains functionally equivalent if available stock is present.

Frequently Asked Questions (FAQ)

Q: Can P3500ECMCLAP be used as a direct replacement for P3500ECMCAP in existing designs?

A: Yes. Both parts are electrically and mechanically identical. All voltage ratings, current specifications, capacitance values, and package configurations match exactly. PCB layouts and circuit designs require no modification.

Q: What is the difference between P3500ECMCAP and P3500ECMCLAP?

A: The parts are electrically identical. Differences exist in product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and packaging format (bulk vs. Tape & Box). The "L" designation in P3500ECMCLAP indicates the Tape & Box packaging variant.

Q: Why is P3500ECMCAP listed as obsolete?

A: Littelfuse Inc. has transitioned this product line. The P3500ECMCLAP represents the current active equivalent with improved regulatory compliance.

Q: Are there any performance differences between these parts?

A: No. Electrical performance is identical across all specified parameters: breakover voltage, off-state voltage, on-state voltage, peak pulse currents, hold current, and capacitance.

Q: What packaging considerations apply to these parts?

A: Both parts use TO-226-2 and TO-92-2 (TO-226AC) package configurations with formed leads and through-hole mounting. P3500ECMCLAP is supplied in Tape & Box format for automated assembly, while P3500ECMCAP is supplied in bulk. Physical footprints are identical.

Q: Does RoHS compliance affect electrical performance?

A: No. ROHS3 compliance in P3500ECMCLAP reflects material composition changes only. Electrical specifications and functional performance remain unchanged from the non-compliant P3500ECMCAP.