PMT3(310)35010 Equivalent & Substitute Parts

Part Overview

The PMT3(310)35010 is a Gas Discharge Tube (GDT) rated for 350V DC spark-over voltage with 20kA impulse discharge current capacity in a 3-pole through-hole configuration. Manufactured by Littelfuse Inc., this component is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

PMT3(310)35010

Littelfuse Inc.In Stock: 1157PMT3(310)35010 Datasheet

Current PartRFQ

2026-35-C3LF

Bourns Inc.In Stock: 10792026-35-C3LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PMT3(310)35010 is determined by strict equivalence across the following critical parameters:

• Voltage Rating: 350V DC spark-over voltage (nominal)
• Discharge Current: 20kA impulse discharge current (8/20µs waveform)
• Pole Configuration: 3-pole architecture
• Mounting Technology: Through-hole assembly
• Physical Package: Axial cylinder with 3 radial leads
• Fail Mode: Non-shorting characteristic
• Regulatory Compliance: ROHS3 compliance

The substitute part 2026-35-C3LF from Bourns Inc. meets all these criteria and is classified as active product status, providing design continuity for applications requiring this GDT specification.

Parameter Comparison

Engineering Selection Recommendations

The 2026-35-C3LF from Bourns Inc. is the qualified substitute for the obsolete PMT3(310)35010. Selection is based on the following factors:

• Electrical Equivalence: Both components share identical voltage rating (350V) and discharge current capacity (20kA), ensuring functional compatibility in surge protection applications.
• Mechanical Compatibility: Identical through-hole mounting configuration and axial cylinder package with 3 radial leads enable direct board-level substitution without layout modifications.
• Product Status: The 2026-35-C3LF maintains active product status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both components meet ROHS3 compliance requirements and share identical ECCN and HTSUS classifications, supporting regulatory and export requirements.
• Tolerance Specification: The Bourns component specifies ±20% tolerance on spark-over voltage, providing defined performance boundaries for design validation.

Frequently Asked Questions (FAQ)

Q: Can the 2026-35-C3LF be used as a direct replacement for the PMT3(310)35010?

A: Yes. Both components meet identical electrical specifications (350V spark-over, 20kA discharge current) and share the same through-hole mounting configuration and axial cylinder package. No circuit modifications are required.

Q: What is the significance of the ±20% tolerance specification on the Bourns part?

A: The ±20% tolerance defines the acceptable range of spark-over voltage performance (280V to 420V). This specification provides measurable performance boundaries. The original Littelfuse part does not specify tolerance in the provided data.

Q: Are there any compliance differences between these components?

A: Both components are ROHS3 compliant and share identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications. No compliance barriers exist for substitution.

Q: Why is the Littelfuse PMT3(310)35010 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Bourns 2026-35-C3LF provides functional and mechanical equivalence for ongoing design support and procurement.

Q: Are there any package or footprint considerations for board redesign?

A: No. Both components use identical axial cylinder packages with 3 radial leads. Existing PCB layouts and component placement require no modification.

Q: What is the difference in Moisture Sensitivity Level (MSL) between the two parts?

A: The Littelfuse component specifies MSL 1 (unlimited shelf life without moisture control). The Bourns component lists MSL as Not Applicable, indicating no moisture sensitivity constraints apply to this component type.