P3500EC Equivalent & Substitute Parts

Part Overview

The P3500EC is a Transient Voltage Suppressor (TVS) thyristor from Littelfuse Inc.'s SIDACtor® series, designed for overvoltage protection applications. This component features a 320V off-state voltage rating with 400A peak pulse current capability in a TO-226-2 package configuration. The P3500EC is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement planning. Direct manufacturer alternatives with identical electrical and mechanical specifications are available to maintain system compatibility.

Substiute Parts

P3500EC

Littelfuse Inc.In Stock: 8590P3500EC Datasheet

Current PartRFQ

P3500ECL

Littelfuse Inc.In Stock: 20194P3500ECL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3500EC is determined by strict equivalence across all electrical and mechanical parameters. The primary substitution criterion is matching the complete electrical specification set: 320V off-state voltage, 400V breakover voltage, 4V on-state voltage, 400A peak pulse current (8/20µs), 100A peak pulse current (10/1000µs), 150mA hold current, and 65pF capacitance. The package configuration must remain TO-226-2 or TO-92-2 (TO-226AC) to ensure mechanical and thermal compatibility. Single-element thyristor configuration is required. Substitute parts must maintain these parameters without deviation to ensure functional equivalence in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The P3500ECL is the direct substitute for the obsolete P3500EC. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all rated parameters. The P3500ECL carries active product status, ensuring ongoing availability and supply chain continuity. The P3500ECL is ROHS3 compliant and REACH unaffected, providing regulatory compliance advantages over the non-compliant P3500EC. For new designs or component replacement in existing systems, the P3500ECL is the appropriate selection. Both components are classified under ECCN EAR99 and HTSUS 8541.30.0080, maintaining consistent export and tariff classification.

Frequently Asked Questions (FAQ)

Q: Can the P3500ECL directly replace the P3500EC in existing circuits? A: Yes. The P3500ECL is electrically and mechanically equivalent to the P3500EC. All voltage ratings, current specifications, capacitance, and package configurations are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between P3500EC and P3500ECL? A: The primary differences are product status and regulatory compliance. The P3500EC is obsolete, while the P3500ECL is active. The P3500ECL is ROHS3 compliant and REACH unaffected, whereas the P3500EC is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts? A: Both components use TO-226-2 and TO-92-2 (TO-226AC) package configurations. The P3500EC is supplied in standard packaging, while the P3500ECL is supplied in bulk packaging. The physical component dimensions and pin configurations remain unchanged.

Q: What is the moisture sensitivity level for these components? A: Both the P3500EC and P3500ECL have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Are these components suitable for high-frequency transient suppression applications? A: These components are rated for transient suppression with peak pulse currents of 400A (8/20µs) and 100A (10/1000µs). Application suitability depends on specific circuit requirements and transient waveform characteristics.