Littelfuse 0230.750DRT1SW Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0230.750DRT1SW is a 750 mA, 250 V AC slow-blow glass cartridge fuse with axial through-hole mounting. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and field replacement applications. Active alternatives within the Littelfuse 230 series provide enhanced compliance and expanded voltage ratings while maintaining core electrical and mechanical compatibility.

Substiute Parts

0230.750DRT1SW

Littelfuse Inc.In Stock: 7150230.750DRT1SW Datasheet

Current PartRFQ

0230.750DRT1SP

Littelfuse Inc.In Stock: 10210230.750DRT1SP Datasheet

DirectRFQ

0230.750DAT1P

Littelfuse Inc.In Stock: 8210230.750DAT1P Datasheet

Parametric EquivalentRFQ

0230.750DRT1P

Littelfuse Inc.In Stock: 109130230.750DRT1P Datasheet

Parametric EquivalentRFQ

0230.750DRT2P

Littelfuse Inc.In Stock: 10650230.750DRT2P Datasheet

Parametric EquivalentRFQ

0230.750DRT2SP

Littelfuse Inc.In Stock: 8780230.750DRT2SP Datasheet

Parametric EquivalentRFQ

0230.750DRT3P

Littelfuse Inc.In Stock: 7770230.750DRT3P Datasheet

Parametric EquivalentRFQ

0230.750DRT3SP

Littelfuse Inc.In Stock: 8880230.750DRT3SP Datasheet

Parametric EquivalentRFQ

0230.750MRT1SSP

Littelfuse Inc.In Stock: 9270230.750MRT1SSP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0230.750DRT1SW is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 750 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)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• Melting I²t: 2.95 (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match required)

All substitute parts listed maintain these core parameters. Substitute parts with active product status and enhanced compliance certifications (ROHS3, REACH Unaffected, CE marking) are preferred for new designs and long-term availability.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete 0230.750DRT1SW, direct substitution is available through active alternatives within the Littelfuse 230 series. Selection criteria are based on product status, regulatory compliance, and certification requirements:

Primary Recommendation: 0230.750DRT1P (Cut Tape packaging) or 0230.750DRT2P (Tape & Reel packaging) are preferred for new designs and production applications. Both parts are active, ROHS3 compliant, and carry CE, CSA, and UL certifications. These parts provide expanded DC voltage rating (125 V) and enhanced breaking capacity (10kA DC) compared to the original part.

Alternative for AC-Only Applications: 0230.750DAT1P is suitable for applications where DC voltage rating is not required. This part maintains AC-only specifications matching the original 0230.750DRT1SW while offering active product status and ROHS3 compliance.

Packaging Considerations: Parts designated with "SP" or "SSP" suffixes are supplied in Tape & Reel format, suitable for automated assembly. Parts with "P" suffix in Cut Tape format are available for manual or semi-automated processes. Selection depends on production methodology and inventory management requirements.

All substitute parts maintain identical electrical performance characteristics (750 mA current rating, 250 V AC voltage, slow-blow response, 2.95 melting I²t, 35A breaking capacity) and mechanical dimensions (0.177" Dia x 0.571" L) required for direct board-level replacement.

Frequently Asked Questions (FAQ)

Q: Can 0230.750DRT1SW be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical current rating (750 mA), AC voltage rating (250 V), response time (slow-blow), fuse type (cartridge glass), package type (non-standard axial), physical dimensions (0.177" Dia x 0.571" L), breaking capacity (35A), melting I²t (2.95), and operating temperature range (-55°C ~ 125°C). Direct board-level substitution is electrically and mechanically compatible.

Q: What is the difference between parts with DC voltage ratings and those without?

A: The original 0230.750DRT1SW does not specify a DC voltage rating. Substitute parts such as 0230.750DRT1SP, 0230.750DRT1P, 0230.750DRT2P, 0230.750DRT2SP, 0230.750DRT3P, 0230.750DRT3SP, and 0230.750MRT1SSP include a 125 V DC rating. This expanded rating provides additional application flexibility for circuits operating under DC conditions. For AC-only applications, 0230.750DAT1P maintains the original AC-only specification.

Q: What packaging options are available?

A: Substitute parts are supplied in three packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) for manual or semi-automated processes, and unspecified packaging for the original part. Selection depends on production volume and assembly methodology. Tape & Reel format is standard for high-volume manufacturing.

Q: Are all substitute parts RoHS compliant?

A: The original 0230.750DRT1SW is RoHS non-compliant. All active substitute parts (0230.750DRT1SP, 0230.750DAT1P, 0230.750DRT1P, 0230.750DRT2P, 0230.750DRT2SP, 0230.750DRT3P, 0230.750DRT3SP, 0230.750MRT1SSP) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part should be selected for new product designs?

A: For new designs, 0230.750DRT1P or 0230.750DRT2P are recommended. Both are active products with full regulatory certifications (CE, CSA, UL), ROHS3 compliance, and expanded DC voltage rating (125 V). These parts ensure long-term availability and compliance with current standards. Packaging selection (Cut Tape vs. Tape & Reel) depends on manufacturing process requirements.

Q: Is there a cross-reference to non-Littelfuse manufacturers?

A: The provided data includes one cross-reference to BK/C515-750-R, which appears in the substitute list for 0230.750DRT1P, 0230.750DRT2P, and 0230.750DRT3P. This indicates potential compatibility with alternative manufacturers, though electrical and mechanical verification is required for applications outside the Littelfuse 230 series.