HV250A Gas Discharge Tube 2500V 3kA 2-Pole Equivalent & Substitute Parts

Part Overview

The Littelfuse HV250A is a Gas Discharge Tube (GDT) rated for 2500V DC spark-over voltage with 3000A (3kA) impulse discharge current capacity in a 2-pole through-hole axial cylinder package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. Substitute parts maintain the same voltage and pole configuration while offering enhanced discharge current ratings and active product status from both Littelfuse and Bourns manufacturers.

Substiute Parts

HV250A

Littelfuse Inc.In Stock: 992HV250A Datasheet

Current PartRFQ

CG32.5L

Littelfuse Inc.In Stock: 1974CG32.5L Datasheet

MFR RecommendedRFQ

CG32.5LTR

Littelfuse Inc.In Stock: 3360CG32.5LTR Datasheet

MFR RecommendedRFQ

2095-250-BLF

Bourns Inc.In Stock: 22972095-250-BLF Datasheet

DirectRFQ

2095-250-BT1LF

Bourns Inc.In Stock: 8462095-250-BT1LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HV250A is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

• Voltage - DC Spark Over (Nominal): 2500 V (exact match required)
• Number of Poles: 2 (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial Cylinder (exact match required)
• Fail Short: No (exact match required)

Allowable Parameter Variance:

• Impulse Discharge Current (8/20µs): Substitute parts rated at 5000A (5kA) exceed the original 3000A (3kA) specification, providing enhanced surge protection capability while maintaining full backward compatibility
• Packaging Format: Original through-hole functionality is preserved across Tray, Cut Tape, and Bulk packaging options

All substitute parts meet or exceed the electrical performance requirements of the HV250A while maintaining identical mechanical and environmental compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Littelfuse CG32.5L and CG32.5LTR (MFR Recommended): Both CG32.5L (Tray packaging) and CG32.5LTR (Cut Tape packaging) are manufacturer-recommended substitutes from Littelfuse. These parts maintain identical electrical specifications to the HV250A while offering 5kA discharge current capacity. Both are active products with ROHS3 compliance and REACH Unaffected status. Selection between these two variants depends on packaging and procurement requirements.

Bourns 2095-250-BLF and 2095-250-BT1LF (Direct Alternatives): Both Bourns 2095 series parts provide direct electrical equivalence with ±20% tolerance specification. The 2095-250-BLF (Bulk packaging) and 2095-250-BT1LF (Tape & Reel packaging) are active products with ROHS3 compliance and REACH Unaffected status. These parts are suitable for applications where cross-manufacturer qualification is acceptable.

All substitute parts are active products with current manufacturing support, eliminating obsolescence risk associated with the HV250A.

Frequently Asked Questions (FAQ)

Q: Can the CG32.5L or CG32.5LTR be used as direct replacements for the HV250A? A: Yes. Both parts maintain identical voltage (2500V), pole count (2), mounting type (through-hole), and package geometry (axial cylinder). The increased discharge current rating (5kA vs. 3kA) provides enhanced protection without compatibility issues.

Q: What is the difference between CG32.5L and CG32.5LTR? A: Both parts are electrically identical. CG32.5L is supplied in Tray packaging, while CG32.5LTR is supplied in Cut Tape format. Selection depends on assembly process requirements and procurement volume.

Q: Are the Bourns 2095-250-BLF and 2095-250-BT1LF equivalent to the Littelfuse options? A: Yes. All four substitute parts meet the same electrical and mechanical requirements. The Bourns parts include ±20% tolerance specification and are supplied by a different manufacturer. Selection may depend on supply chain, cost, or qualification requirements.

Q: Does the increased discharge current rating (5kA vs. 3kA) affect circuit compatibility? A: No. Higher discharge current rating indicates enhanced surge protection capability. The part will function identically in circuits designed for the HV250A while providing superior transient protection.

Q: What packaging options are available for these substitutes? A: Littelfuse CG32.5L is available in Tray; CG32.5LTR in Cut Tape. Bourns 2095-250-BLF is available in Bulk; 2095-250-BT1LF in Tape & Reel. All maintain through-hole axial cylinder form factor.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory requirements.