SL1021B230RG Gas Discharge Tube - Equivalent & Substitute Parts

Part Overview

The SL1021B230RG is a 3-pole gas discharge tube (GDT) rated for 230V DC spark-over voltage with 20kA impulse discharge current capacity. This component is designed for through-hole mounting in overvoltage protection applications. The part is currently listed as obsolete, making identification of active equivalent models essential for ongoing procurement and design continuity.

Substiute Parts

SL1021B230RG

Littelfuse Inc.In Stock: 1049SL1021B230RG Datasheet

Current PartRFQ

SL1021B230RF

Littelfuse Inc.In Stock: 3407SL1021B230RF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SL1021B230RG has one direct equivalent substitute: SL1021B230RF. Substitution is valid based on the following criteria:

• Identical voltage rating: 230V DC spark-over voltage
• Identical impulse discharge current: 20kA (8/20µs)
• Identical pole configuration: 3-pole design
• Identical fail-short characteristic
• Identical mounting type: Through-hole
• Identical package form: Axial Cylinder, 3 Lead (Radial Bend)
• Identical electrical and mechanical specifications
• Both parts comply with ROHS3 and carry MSL 1 rating

The primary distinction is product status: SL1021B230RG is obsolete, while SL1021B230RF is active. Packaging differs (tape/reel versus tray), but this does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

SL1021B230RF is the direct active equivalent for SL1021B230RG. Both parts are manufactured by Littelfuse Inc. within the same SL1021B series and share identical electrical and mechanical specifications. The substitute part is currently in active production status with confirmed inventory availability (3300 pcs), whereas the original part is obsolete.

Both parts meet ROHS3 compliance requirements and carry identical ECCN (EAR99) and HTSUS (8536.30.8000) classifications. The packaging difference (tray versus tape/reel) does not affect component performance or PCB assembly compatibility for through-hole mounting applications.

Frequently Asked Questions (FAQ)

Q: Can SL1021B230RF be used as a direct replacement for SL1021B230RG?

A: Yes. Both parts are electrically and mechanically identical. They share the same 230V spark-over voltage, 20kA impulse discharge current rating, 3-pole configuration, and through-hole mounting specifications. The substitute is the active production equivalent.

Q: What is the difference between the two part numbers?

A: The primary difference is product status. SL1021B230RG is obsolete; SL1021B230RF is active. Secondary difference is packaging: SL1021B230RG uses tape/reel format, while SL1021B230RF uses tray format. Electrical and mechanical performance are identical.

Q: Does the packaging format affect PCB assembly?

A: Packaging format affects procurement and handling logistics but does not affect component performance or PCB assembly compatibility. Both formats contain the same through-hole component with identical lead configuration and spacing.

Q: Are both parts RoHS compliant?

A: Yes. Both SL1021B230RG and SL1021B230RF are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is valid when the following parameters match: DC spark-over voltage (230V), impulse discharge current (20kA at 8/20µs), number of poles (3), fail-short characteristic (Yes), mounting type (Through Hole), and package form (Axial Cylinder, 3 Lead with Radial Bend).