Littelfuse P3500EA Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The Littelfuse P3500EA is a thyristor-based transient voltage suppressor (TVS) designed for overvoltage protection applications. This device operates as a SIDACtor® component with a 320V off-state voltage rating and 150A peak pulse current capability in an TO-226-2 package configuration.

The P3500EA carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and meet current regulatory compliance requirements for new production runs or system updates.

Substiute Parts

P3500EA

LittelfuseIn Stock: 2135P3500EA Datasheet

Current PartRFQ

P3500EAL

LittelfuseIn Stock: 5206P3500EAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3500EA is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage ratings: Breakover voltage (400V), off-state voltage (320V), and on-state voltage (4V) must match exactly
• Current specifications: Peak pulse current at 8/20µs (150A) and 10/1000µs (45A) must be identical
• Hold current (Ih): 150mA requirement must be maintained
• Capacitance: 35pF specification must be preserved
• Package configuration: TO-226-2 / TO-92-2 through-hole mounting must be retained
• Single-element design requirement

The P3500EAL meets all these criteria and qualifies as a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The P3500EAL is the direct substitute for the obsolete P3500EA. Both components are manufactured by Littelfuse and belong to the SIDACtor® series with identical electrical and mechanical specifications.

Key differentiation factors:

• Product Status: P3500EA is obsolete; P3500EAL is active and currently in production
• RoHS Compliance: P3500EA is RoHS non-compliant; P3500EAL is ROHS3 compliant
• REACH Status: P3500EAL is REACH unaffected
• Packaging: P3500EA is supplied in standard packaging; P3500EAL is available in bulk packaging
• Inventory: P3500EAL has higher current availability (5100 pcs vs. 2107 pcs)

For new designs or production updates, P3500EAL is the appropriate selection due to active product status and regulatory compliance alignment.

Frequently Asked Questions (FAQ)

Q: Can P3500EAL be used as a direct replacement for P3500EA in existing designs?

A: Yes. The P3500EAL is electrically and mechanically identical to the P3500EA across all specified parameters, including voltage ratings, current ratings, capacitance, and TO-226-2 package configuration. Direct substitution is valid.

Q: What is the difference between P3500EA and P3500EAL?

A: The primary differences are product status (obsolete vs. active), RoHS compliance level (non-compliant vs. ROHS3 compliant), and packaging format (standard vs. bulk). Electrical and mechanical specifications are identical.

Q: Are there any package compatibility considerations?

A: Both parts use the same TO-226-2 / TO-92-2 through-hole package. PCB footprints and mounting procedures are identical. No design modifications are required.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance ensures the component meets current environmental and material restriction standards. For new production runs or systems subject to regulatory requirements, P3500EAL's compliance status is advantageous.

Q: Is the P3500EAL available in the same quantities as the P3500EA?

A: P3500EAL has higher current inventory availability (5100 pcs) compared to P3500EA (2107 pcs), making it a more reliable choice for ongoing supply requirements.