Equivalent & Substitute Parts for 0429007.WRML

Part Overview

The 0429007.WRML is a 7A surface mount board mount fuse rated for 24V AC/DC operation in a 1206 (3216 Metric) package. Manufactured by Littelfuse Inc., this component is classified as obsolete, necessitating identification of active substitute parts for new designs and ongoing production requirements. The fast-blow response characteristic and compact surface mount form factor make this fuse suitable for low-voltage circuit protection applications.

Substiute Parts

0429007.WRML

Littelfuse Inc.In Stock: 310290429007.WRML Datasheet

Current PartRFQ

0437007.WR

Littelfuse Inc.In Stock: 1022160437007.WR Datasheet

MFR RecommendedRFQ

SF-1206F700-2

Bourns Inc.In Stock: 1932SF-1206F700-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 0429007.WRML is determined by the following critical parameters:

• Current Rating: 7 A (must match exactly)
• Package / Case: 1206 (3216 Metric) (must match exactly)
• Mounting Type: Surface Mount (must match exactly)
• Fuse Type: Board Mount (Cartridge Style Excluded) (must match exactly)
• Response Time: Fast Blow (must match exactly)
• Voltage Rating: Substitute parts must meet or exceed both AC and DC voltage requirements of the original part

The identified substitute parts maintain identical current rating, package, mounting type, and response characteristics. Both substitutes provide equal or higher voltage ratings, ensuring compatibility in applications originally designed for the 0429007.WRML.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing support, addressing the obsolescence of the original 0429007.WRML.

The 0437007.WR (Littelfuse) maintains manufacturer continuity and provides higher voltage ratings (32V AC / 35V DC) with extended operating temperature range (-55°C ~ 150°C). This part carries CSA and UL approvals and is available in higher inventory quantities (102,200 pcs).

The SF-1206F700-2 (Bourns) offers equivalent current and package specifications with 32V DC rating and UL approval. This part features lower DC cold resistance (0.007 Ohms) and is available in active production (1,900 pcs).

Both parts satisfy RoHS3 compliance and REACH unaffected status. Selection between these substitutes depends on supply chain preference, voltage margin requirements, and temperature operating envelope specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 0437007.WR directly replace the 0429007.WRML?

A: Yes. Both parts share identical current rating (7A), package (1206), mounting type (surface mount), fuse type (board mount), and response time (fast blow). The 0437007.WR provides higher voltage ratings (32V AC / 35V DC), making it suitable for applications originally designed for 24V AC/DC operation.

Q: What is the key difference between the two substitute parts?

A: The 0437007.WR is a Littelfuse product with extended temperature range (-55°C ~ 150°C) and higher breaking capacity (50A). The SF-1206F700-2 is a Bourns product with lower DC cold resistance (0.007 Ohms) and standard temperature range (-40°C ~ 105°C). Both maintain the required 7A current rating and 1206 package specification.

Q: Are there voltage compatibility concerns when substituting?

A: No. Both substitute parts exceed the original 24V AC/DC rating. The 0437007.WR provides 32V AC / 35V DC, and the SF-1206F700-2 provides 32V DC. Higher voltage ratings ensure safe operation in circuits designed for the original part's voltage specification.

Q: Do the substitute parts have the same physical dimensions?

A: All three parts use the 1206 (3216 Metric) package. Minor dimensional variations exist within this standard package class. The 0437007.WR measures 0.126" L x 0.064" W x 0.032" H, while the SF-1206F700-2 measures 0.122" L x 0.061" W x 0.024" H. Both are compatible with standard 1206 PCB footprints.

Q: What certifications apply to the substitute parts?

A: The 0437007.WR carries CSA and UL approvals. The SF-1206F700-2 carries UL approval. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.