Littelfuse 0230.250DRT3SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230.250DRT3SW is a 250 mA, 250 V AC glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in axial configuration. This part is classified as obsolete. Due to its obsolete status, equivalent active production alternatives from Littelfuse are available that maintain identical electrical and mechanical specifications while offering improved compliance and availability.

Substiute Parts

0230.250DRT3SW

Littelfuse Inc.In Stock: 11130230.250DRT3SW Datasheet

Current PartRFQ

0230.250DRT3SP

Littelfuse Inc.In Stock: 11820230.250DRT3SP Datasheet

DirectRFQ

0230.250DRT1P

Littelfuse Inc.In Stock: 11960230.250DRT1P Datasheet

Parametric EquivalentRFQ

0230.250DRT1SP

Littelfuse Inc.In Stock: 11810230.250DRT1SP Datasheet

Parametric EquivalentRFQ

0230.250DRT2P

Littelfuse Inc.In Stock: 10510230.250DRT2P Datasheet

Parametric EquivalentRFQ

0230.250DRT2SP

Littelfuse Inc.In Stock: 8000230.250DRT2SP Datasheet

Parametric EquivalentRFQ

0230.250DRT3P

Littelfuse Inc.In Stock: 11740230.250DRT3P Datasheet

Parametric EquivalentRFQ

0230.250MRT1SSP

Littelfuse Inc.In Stock: 7880230.250MRT1SSP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0230.250DRT3SW are determined by equivalence in the following critical parameters:

• Current Rating: 250 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: Cartridge, Non-Standard (Axial) (exact match required)
• Size / Dimension: 0.177" Dia x 0.571" L (4.50mm x 14.50mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Melting I²t: 0.216 (exact match required)

All substitute parts listed below meet these criteria. Substitute parts additionally provide DC voltage rating (125 V DC) and enhanced breaking capacity specifications not present in the main part specification.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are direct parametric equivalents to the 0230.250DRT3SW and are suitable for replacement in applications requiring 250 mA, 250 V AC slow-blow glass cartridge fuses in axial through-hole configuration.

The primary distinction between the main part and substitute parts is product status and compliance:

• The 0230.250DRT3SW is obsolete and RoHS non-compliant
• All substitute parts are active production items with ROHS3 compliance
• All substitute parts carry CE, CSA, and UL approvals
• All substitute parts are REACH unaffected

Substitute parts provide additional DC voltage rating (125 V) and specified DC breaking capacity (10kA), which represent enhanced specifications beyond the main part. These enhancements do not affect AC circuit compatibility.

Packaging differences exist between substitute options. The 0230.250DRT3SW is supplied in bulk packaging, while all substitute parts are supplied in Tape & Reel (TR) format. This distinction affects procurement and assembly processes but does not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can I use any of the listed substitute parts as a direct replacement for the 0230.250DRT3SW?

A: Yes. All listed substitute parts meet the required electrical and mechanical specifications: 250 mA current rating, 250 V AC voltage rating, slow-blow response, glass cartridge type, axial configuration, and identical physical dimensions (0.177" Dia x 0.571" L). They are electrically and mechanically interchangeable.

Q: What is the difference between the substitute parts?

A: All substitute parts are parametrically identical in terms of current rating, voltage rating, response time, fuse type, package case, mounting type, size, operating temperature range, and melting I²t. The differences are in packaging format (all are Tape & Reel) and internal manufacturing variations indicated by part number suffixes. These variations do not affect electrical performance or mechanical fit.

Q: Why do the substitute parts have a DC voltage rating when the main part does not?

A: The substitute parts include DC voltage rating (125 V) and DC breaking capacity (10kA) specifications. These represent additional rated parameters provided by the manufacturer for the active production parts. In AC-only applications, these DC specifications do not affect circuit operation.

Q: Are there any compliance or certification differences?

A: The main part (0230.250DRT3SW) carries CSA and UL approvals and is RoHS non-compliant. All substitute parts carry CE, CSA, and UL approvals and are ROHS3 compliant. If RoHS compliance is required for your application, substitute parts are necessary.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (bulk versus Tape & Reel) affects procurement, storage, and assembly processes but does not affect electrical or mechanical performance. The fuse components themselves are identical.

Q: What is the DC cold resistance specification used for?

A: DC cold resistance is the measured resistance of the fuse element at room temperature with no current flowing. The main part specifies 2.41 Ohms; substitute parts specify 2.43 Ohms. This minor variation (0.02 Ohms) is within normal manufacturing tolerance and does not affect circuit operation.