Equivalent & Substitute Parts for Bourns 2037-40-CLF

Part Overview

The Bourns 2037-40-CLF is a Gas Discharge Tube (GDT) rated for 400V DC spark-over voltage with 5000A (5kA) impulse discharge current capacity in a 2-pole through-hole configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for continued system design and procurement. The 2037-40-CLF maintains ROHS3 compliance and is suitable for overvoltage protection applications requiring axial cylinder package geometry.

Substiute Parts

2037-40-CLF

Bourns Inc.In Stock: 12002037-40-CLF Datasheet

Current PartRFQ

2037-40-BLF

Bourns Inc.In Stock: 7402037-40-BLF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 2037-40-CLF has one direct equivalent substitute: the 2037-40-BLF. Substitution eligibility is determined by matching the following critical electrical and mechanical parameters:

• Voltage - DC Spark Over (Nominal): 400 V
• Impulse Discharge Current (8/20µs): 5000A (5kA)
• Tolerance: ±15%
• Number of Poles: 2
• Mounting Type: Through Hole
• Package / Case: Axial Cylinder
• Fail Short characteristic: No

The 2037-40-BLF satisfies all substitution criteria and represents the active product status equivalent within the Bourns 2037 series.

Parameter Comparison

Engineering Selection Recommendations

The 2037-40-BLF is the direct functional equivalent for the obsolete 2037-40-CLF. Both components share identical electrical specifications (400V DC spark-over, 5kA impulse discharge current) and mechanical configuration (2-pole, through-hole, axial cylinder package). The 2037-40-BLF maintains active product status and full regulatory compliance (ROHS3, REACH Unaffected, EAR99 classification). Selection of the 2037-40-BLF eliminates obsolescence risk while preserving circuit performance and compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the 2037-40-BLF directly replace the 2037-40-CLF in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The 2037-40-BLF is the active equivalent and requires no circuit modifications.

Q: What is the difference between the CLF and BLF packaging designations?

A: The CLF designation indicates tape-and-reel packaging, while BLF indicates bulk packaging. Both contain identical components with the same electrical and mechanical specifications.

Q: Are there compliance differences between these parts?

A: No. Both the 2037-40-CLF and 2037-40-BLF maintain identical RoHS3, REACH, and ECCN classifications.

Q: Why is the 2037-40-CLF listed as obsolete?

A: Obsolescence reflects manufacturing discontinuation. The 2037-40-BLF remains in active production and serves as the current equivalent for new designs and procurement.

Q: What are the critical parameters for GDT substitution in this application?

A: Voltage rating (400V DC spark-over), impulse current capacity (5kA), pole configuration (2-pole), and package type (through-hole axial cylinder) must remain constant for functional equivalence.