Bourns 2028-25-ALF Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The Bourns 2028-25-ALF is a 3-pole gas discharge tube (GDT) rated for 250V DC spark-over voltage with 20kA impulse discharge current capacity. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The 2028 series has been superseded by the TRIGARD® 2026 series, which maintains electrical and mechanical compatibility while offering active product status and continued manufacturer support.

Substiute Parts

2028-25-ALF

Bourns Inc.In Stock: 11142028-25-ALF Datasheet

Current PartRFQ

2026-25-ALF

Bourns Inc.In Stock: 7572026-25-ALF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2028-25-ALF is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - DC Spark Over (Nominal): 250 V
• Impulse Discharge Current (8/20µs): 20000A (20kA)
• Tolerance: ±20%
• Number of Poles: 3
• Fail Short characteristic: No
• Package / Case: Cylinder No Lead, 3 Terminal
• Mounting Type: User Defined

The Bourns TRIGARD® 2026-25-ALF meets all these criteria and qualifies as a direct substitute. Both parts share identical electrical ratings, mechanical packaging, and terminal configuration, enabling pin-for-pin replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 2026-25-ALF is the appropriate substitute for the obsolete 2028-25-ALF. Both parts maintain identical electrical performance specifications and mechanical packaging, ensuring functional equivalence in circuit protection applications. The 2026-25-ALF offers the additional advantage of active product status, providing continued availability, manufacturer technical support, and compliance with current regulatory standards. Both parts satisfy ROHS3 and REACH compliance requirements, with matching export classification (EAR99) and tariff codes.

Frequently Asked Questions (FAQ)

Q: Can the 2026-25-ALF be used as a direct replacement for the 2028-25-ALF?

A: Yes. Both parts are electrically and mechanically equivalent, with identical 250V DC spark-over voltage, 20kA impulse discharge current, 3-pole configuration, and Cylinder No Lead 3-terminal packaging. Pin-for-pin substitution is supported.

Q: What is the primary reason to transition from the 2028-25-ALF to the 2026-25-ALF?

A: The 2028-25-ALF is classified as obsolete, while the 2026-25-ALF maintains active product status. This ensures continued component availability, manufacturer support, and compliance with evolving regulatory requirements.

Q: Are there any differences in compliance or certifications between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. Both carry EAR99 export classification and share the same HTSUS tariff code (8536.30.8000), indicating equivalent regulatory standing.

Q: Does the package or mounting configuration differ between these parts?

A: No. Both parts use identical Cylinder No Lead, 3-terminal packaging with user-defined mounting type, ensuring mechanical compatibility in existing designs.

Q: What tolerance specification applies to both parts?

A: Both the 2028-25-ALF and 2026-25-ALF operate within ±20% tolerance on the 250V DC spark-over voltage specification.