CG42.5SM Gas Discharge Tube 2500V 3kA 2-Pole SMD Equivalent & Substitute Parts

Part Overview

The CG42.5SM is a 2500V, 3kA gas discharge tube (GDT) manufactured by Littelfuse Inc., designed for surface mount applications. This component provides overvoltage protection in two-pole configurations. The part is currently active in production with full inventory availability. Equivalent and substitute parts are identified based on matching electrical performance characteristics and mechanical compatibility within the same product category.

Substiute Parts

CG42.5SM

Littelfuse Inc.In Stock: 1392CG42.5SM Datasheet

Current PartRFQ

2093-250-SM-RPLF

Bourns Inc.In Stock: 48292093-250-SM-RPLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CG42.5SM is determined by the following critical parameters:

• Voltage - DC Spark Over (Nominal): Must equal 2500 V
• Impulse Discharge Current (8/20µs): Must equal 3000A (3kA)
• Number of Poles: Must equal 2
• Mounting Type: Must be Surface Mount
• Package / Case: Must be 2-SMD Cylinder Square End
• Fail Mode: Must not fail short
• RoHS Status: Must be ROHS3 Compliant

The substitute part 2093-250-SM-RPLF manufactured by Bourns Inc. meets all critical electrical and mechanical parameters, enabling direct substitution in applications requiring 2500V, 3kA two-pole gas discharge tube protection.

Parameter Comparison

Engineering Selection Recommendations

Both the CG42.5SM and 2093-250-SM-RPLF are active production components with full regulatory compliance. Selection between these parts should be based on:

• Availability and lead time requirements
• Tolerance specifications (Bourns part specifies ±20% tolerance)
• Inventory levels and supply chain considerations
• Manufacturer qualification requirements for your application

Both parts satisfy ROHS3 compliance, REACH unaffected status, and MSL 1 requirements, making them suitable for equivalent substitution in surface mount overvoltage protection circuits.

Frequently Asked Questions (FAQ)

Q: Can the 2093-250-SM-RPLF directly replace the CG42.5SM?

A: Yes. Both parts share identical electrical ratings (2500V spark over, 3kA impulse discharge current), identical pole configuration (2-pole), identical mounting type (surface mount), and identical package geometry (2-SMD Cylinder Square End). Both are ROHS3 compliant with MSL 1 rating.

Q: What is the difference in tolerance between these parts?

A: The CG42.5SM does not specify a tolerance value in the provided data. The 2093-250-SM-RPLF specifies ±20% tolerance. This tolerance applies to the electrical characteristics and should be evaluated against your circuit design requirements.

Q: Are there any package or footprint differences?

A: No. Both parts use the identical 2-SMD Cylinder Square End package, ensuring footprint compatibility on PCB layouts.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What regulatory certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.