Littelfuse 0154.750DRL Surface Mount Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0154.750DRL is a 750 mA, 125 V AC/DC surface mount board mount fuse designed for fast-blow protection in electronic circuits. This component is part of the OMNI-BLOK® 154L series and is actively manufactured. The fuse requires a holder for installation and is housed in a 2-SMD square end block package. Finding equivalent substitute parts is necessary to ensure supply chain continuity, optimize inventory management, and maintain design flexibility across manufacturing batches.

Substiute Parts

0154.750DRL

Littelfuse Inc.In Stock: 8710154.750DRL Datasheet

Current PartRFQ

0154.750DR

Littelfuse Inc.In Stock: 62430154.750DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 0154.750DRL has one parametric equivalent substitute: the 0154.750DR. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications. Substitution is valid based on the following matching parameters:

• Current Rating: 750 mA (identical)
• Voltage Rating: 125 V AC / 125 V DC (identical)
• Response Time: Fast Blow (identical)
• Mounting Type: Requires Holder, Surface Mount (identical)
• Package / Case: 2-SMD, Square End Block with Holder (identical)
• Breaking Capacity @ Rated Voltage: 50A (identical)
• Melting I²t: 0.185 (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)
• DC Cold Resistance: 0.245 Ohms (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Approval Agency: UL (identical)

The primary difference between these parts is the series designation (OMNI-BLOK® 154L versus OMNI-BLOK® 154) and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both the 0154.750DRL and 0154.750DR are active products manufactured by Littelfuse Inc. with identical electrical and mechanical specifications. Both parts carry UL approval and are ROHS3 compliant, meeting regulatory requirements for modern electronic applications. The 0154.750DR offers significantly higher inventory availability (6200 units versus 839 units), making it the preferred choice for high-volume production runs or when supply chain continuity is a priority. Either part is suitable for direct substitution in applications requiring 750 mA fast-blow protection at 125 V AC/DC with surface mount board mount installation.

Frequently Asked Questions (FAQ)

Q: Can the 0154.750DR be used as a direct replacement for the 0154.750DRL?

A: Yes. Both parts are electrically and mechanically identical, with matching current ratings, voltage ratings, response times, package configurations, and thermal specifications. The parts differ only in series designation and inventory levels.

Q: What is the difference between the OMNI-BLOK® 154L and OMNI-BLOK® 154 series?

A: The series designation indicates different product lines within Littelfuse's fuse portfolio. Both series share identical electrical and mechanical parameters for this 750 mA fast-blow fuse. The difference is organizational and does not affect functional performance or compatibility.

Q: Are both parts suitable for the same circuit protection applications?

A: Yes. Both the 0154.750DRL and 0154.750DR provide identical protection characteristics: 750 mA fast-blow response, 125 V AC/DC voltage rating, 50A breaking capacity, and 0.185 melting I²t. They are interchangeable for all applications requiring these specifications.

Q: Do both parts require the same holder for installation?

A: Yes. Both parts are surface mount board mount fuses in 2-SMD square end block packages that require a compatible holder. The physical dimensions are identical (0.383" L x 0.198" W x 0.150" H), ensuring compatibility with the same mounting hardware.

Q: What is the significance of the 0.245 Ohms DC cold resistance specification?

A: DC cold resistance is the measured resistance of the fuse element at room temperature before operation. This value is identical for both parts (0.245 Ohms) and is used in circuit design calculations to determine voltage drop and power dissipation under normal operating conditions.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical certifications: UL approval, ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification. They meet the same regulatory and environmental standards.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection may be based on inventory availability, supply chain preferences, or existing component databases. The 0154.750DR offers higher stock levels, which may provide supply chain advantages for production planning.