HV250C Gas Discharge Tube 2500V 3kA 2-Pole Equivalent & Substitute Parts

Part Overview

The HV250C is a Gas Discharge Tube (GDT) rated for 2500V DC spark-over voltage with 3000A (3kA) impulse discharge current capacity in a 2-pole configuration. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The HV250C operates in applications requiring transient overvoltage protection across two independent circuits or a single protected path with return.

Substiute Parts

HV250C

LittelfuseIn Stock: 963HV250C Datasheet

Current PartRFQ

CG32.5

Littelfuse Inc.In Stock: 915CG32.5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HV250C is determined by the following critical parameters that must remain constant or be compatible with the application:

Fixed Parameters (Must Match):

• Voltage - DC Spark Over (Nominal): 2500 V
• Number of Poles: 2
• Fail Short: No
• Package / Case: Cylinder No Lead
• Mounting Type: User Defined

Variable Parameters (Allowable Variation):

• Impulse Discharge Current (8/20µs): The HV250C is rated for 3000A (3kA). Substitute parts with equal or higher discharge current capacity are functionally compatible, as they provide equivalent or enhanced transient protection capability without compromising circuit safety.

The CG32.5 qualifies as a direct substitute based on matching all fixed parameters while providing increased impulse discharge current capacity (5000A / 5kA), making it suitable for applications requiring equal or greater surge protection performance.

Parameter Comparison

Engineering Selection Recommendations

The CG32.5 is the qualified substitute for the HV250C based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical 2500V DC spark-over voltage and 2-pole configuration. The CG32.5 provides 5000A (5kA) impulse discharge current, exceeding the HV250C specification of 3000A (3kA). This increased capacity ensures equivalent or superior transient protection performance in the same application circuit.

Regulatory Compliance: Both parts are ROHS3 Compliant and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), confirming compatibility with existing manufacturing and storage protocols.

Product Status: The HV250C is classified as Obsolete, while the CG32.5 maintains Active product status with current manufacturing support from Littelfuse Inc. This status difference makes the CG32.5 the appropriate long-term solution for component procurement and system redesign.

Physical Form Factor: Both components utilize Cylinder No Lead packaging, ensuring mechanical compatibility with existing PCB layouts and mounting infrastructure.

Frequently Asked Questions (FAQ)

Q: Can the CG32.5 directly replace the HV250C in existing designs?

A: Yes. The CG32.5 maintains identical voltage rating (2500V), pole count (2), and physical package (Cylinder No Lead). The higher impulse discharge current rating (5kA vs. 3kA) provides equivalent or enhanced protection without circuit modification.

Q: What is the significance of the higher impulse discharge current in the CG32.5?

A: The CG32.5 is rated for 5000A (5kA) impulse discharge current compared to the HV250C's 3000A (3kA). This higher rating indicates greater surge handling capacity. For applications originally designed for 3kA protection, the 5kA-rated CG32.5 provides the same protection level with additional margin.

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

A: Both components are ROHS3 Compliant with identical MSL ratings (1 / Unlimited). No compliance barriers exist for substitution.

Q: Why is the HV250C listed as Obsolete?

A: Obsolete status indicates the HV250C is no longer in active production. The CG32.5, with Active product status, represents the current Littelfuse offering for this protection class and should be specified for new designs and ongoing procurement.

Q: Are the packaging and mounting specifications identical?

A: Yes. Both parts use Cylinder No Lead packaging with User Defined mounting type, ensuring mechanical and electrical compatibility in existing circuit board layouts.