Equivalent & Substitute Parts for S1901-46R

Part Overview

The S1901-46R is a fuse clip designed for blade-type miniature (ATM) fuses with a 15 A current rating. Manufactured by Harwin Inc., this surface mount component is classified as obsolete, making identification of suitable substitute parts essential for ongoing production and maintenance applications. The part is used in PCB-level fuse holder applications where reliable blade fuse retention and electrical contact are required.

Substiute Parts

S1901-46R

Harwin Inc.In Stock: 737S1901-46R Datasheet

Current PartRFQ

M20-6152005

Harwin Inc.In Stock: 2200M20-6152005 Datasheet

MFR RecommendedRFQ

3563

Keystone ElectronicsIn Stock: 16393563 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S1901-46R are identified based on the following critical parameters that define functional equivalence:

• Current Rating: 15 A (exact match required)
• Fuse Type: Blade (exact match required)
• Fuseholder Type: Clip (exact match required)
• Number of Circuits: 1 (exact match required)
• Mounting Type: Surface Mount (exact match required)
• For Use With: Miniature (ATM) fuses (exact match required)
• Contact Material: Brass (preferred for electrical performance)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The substitute part identified is the Keystone Electronics 3563, which matches all critical functional parameters while offering an active product status and enhanced voltage rating specification.

Parameter Comparison

Engineering Selection Recommendations

The Keystone Electronics 3563 is the direct substitute for the obsolete S1901-46R. Both parts meet ROHS3 compliance and share identical current ratings, fuse type, fuseholder type, circuit count, and mounting configuration. The 3563 offers the advantage of active product status, ensuring continued availability and supply chain reliability.

The primary differences are termination style (Solder Lug versus Gull Wing) and contact finish (Brass versus Tin). The 3563 provides an explicit 500V voltage rating, which exceeds typical ATM fuse holder requirements. Both parts maintain MSL 1 classification, indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the Keystone Electronics 3563 be used as a direct replacement for the S1901-46R?

A: Yes. Both parts are rated for 15 A blade-type miniature (ATM) fuses in single-circuit surface mount configurations. Electrical and mechanical compatibility is established through matching current rating, fuse type, fuseholder type, and mounting method.

Q: What is the significance of the different termination styles?

A: The S1901-46R uses Solder Lug termination, while the 3563 uses Gull Wing termination. Both are surface mount termination methods suitable for PCB soldering. The choice depends on PCB pad layout and reflow soldering process parameters. Verify PCB footprint compatibility before substitution.

Q: Does the 500V rating on the 3563 affect compatibility?

A: No. The 500V rating on the 3563 represents the maximum voltage the component can withstand. This specification is equal to or exceeds typical ATM fuse holder voltage requirements and does not restrict its use in applications originally designed for the S1901-46R.

Q: Are there any compliance or regulatory differences?

A: Both parts are ROHS3 compliant and carry MSL 1 classification. No regulatory barriers exist for substitution in applications requiring these certifications.

Q: What is the difference between Brass and Tin contact finishes?

A: Brass finish provides corrosion resistance and is the original specification. Tin finish offers improved solderability and is commonly used in modern surface mount components. Both finishes are suitable for blade fuse clip applications and maintain electrical contact integrity.