Littelfuse 0154002.DR Surface Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0154002.DR is a 2 A, 125 V AC/DC board mount fuse in the OMNI-BLOK® 154 series, designed for surface mount applications requiring a holder. This fast-blow fuse is actively manufactured and widely stocked. Substitute parts may be required due to design revisions, application-specific holder compatibility, or series consolidation within the OMNI-BLOK® and NANO²® product families.

Substiute Parts

0154002.DR

Littelfuse Inc.In Stock: 109560154002.DR Datasheet

Current PartRFQ

0157002.DR

Littelfuse Inc.In Stock: 106910157002.DR Datasheet

MFR RecommendedRFQ

0154002.DRL

Littelfuse Inc.In Stock: 17760154002.DRL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters:

• Current Rating: 2 A
• Voltage Rating: 125 V AC / 125 V DC
• Response Time: Fast Blow
• Mounting Type: Requires Holder, Surface Mount
• Breaking Capacity: 50 A @ Rated Voltage
• Melting I²t: 0.53
• Operating Temperature: -55°C to 125°C
• RoHS and Regulatory Compliance: ROHS3 Compliant, PSE/UL approved

Two substitute parts meet these criteria:

1. 0157002.DR (MFR Recommended): NANO²® 157 series with clip-style holder interface
2. 0154002.DRL (Parametric Equivalent): OMNI-BLOK® 154L series with holder interface

Both substitutes maintain identical electrical performance and thermal characteristics while differing in physical dimensions and holder attachment method.

Parameter Comparison

Engineering Selection Recommendations

All three parts are actively manufactured and ROHS3 compliant with PSE approval. Selection between them depends on holder compatibility and physical space constraints:

• 0154002.DR: Use as primary selection. Maintains standard OMNI-BLOK® 154 series holder interface with full UL certification.
• 0157002.DR: Select when clip-style holder attachment is required or when compact dimensions (6.50mm length) are necessary. Includes cULus certification in addition to PSE.
• 0154002.DRL: Select as alternative within the OMNI-BLOK® family. Maintains identical dimensions and holder interface to the main part while offering OMNI-BLOK® 154L series designation.

All substitutes maintain electrical equivalence with identical current rating, voltage rating, breaking capacity, and melting I²t characteristics.

Frequently Asked Questions (FAQ)

Q: Can 0157002.DR be used as a direct replacement for 0154002.DR?

A: Electrical substitution is valid. However, the 0157002.DR uses a clip-style holder interface versus the standard holder on 0154002.DR. Verify holder compatibility with your PCB design before implementation. Physical dimensions also differ: 0157002.DR is significantly smaller (6.50mm vs 9.73mm length).

Q: What is the difference between 0154002.DR and 0154002.DRL?

A: Both parts share identical electrical specifications, dimensions, and holder interface. The primary difference is series designation: 0154002.DR belongs to OMNI-BLOK® 154, while 0154002.DRL belongs to OMNI-BLOK® 154L. Both are functionally equivalent for board mount applications.

Q: Are all three parts certified to the same standards?

A: 0154002.DR and 0154002.DRL carry PSE and UL certifications. 0157002.DR carries PSE and cULus certifications. All meet ROHS3 compliance requirements. Verify certification requirements for your specific application before selection.

Q: Does the DC cold resistance difference between 0154002.DR (0.0367 Ohms) and 0157002.DR (0.0373 Ohms) affect circuit performance?

A: The resistance variance is 0.0006 Ohms, representing a 1.6% difference. This is within normal manufacturing tolerance and does not affect fuse operation or circuit protection characteristics for standard applications.

Q: Can I use 0157002.DR in a design originally specified for 0154002.DR without PCB modification?

A: Electrical substitution is valid. However, physical dimensions and holder attachment method differ. PCB layout modification may be required to accommodate the smaller 0157002.DR package and clip-style holder interface. Consult your PCB design documentation and holder specifications before implementation.