1206SFS500F/32-2 Equivalent & Substitute Parts

Part Overview

The 1206SFS500F/32-2 is a surface mount board mount fuse manufactured by Littelfuse Inc., rated for 5A at 32VDC with slow blow response characteristics. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The part is housed in a 1206 (3216 Metric) package and meets ROHS3 compliance requirements.

Substiute Parts

1206SFS500F/32-2

Littelfuse Inc.In Stock: 27741206SFS500F/32-2 Datasheet

Current PartRFQ

SF-1206SP500M-2

Bourns Inc.In Stock: 4452SF-1206SP500M-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1206SFS500F/32-2 is determined by strict equivalence across the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating (DC): 32 V (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required for PCB compatibility)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Response Time: Slow Blow (exact match required for circuit protection characteristics)
• Breaking Capacity @ Rated Voltage: 50A (exact match required)

The SF-1206SP500M-2 manufactured by Bourns Inc. meets all substitution criteria across these parameters, establishing it as a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The SF-1206SP500M-2 is the direct substitute for the obsolete 1206SFS500F/32-2. Both components share identical electrical and mechanical specifications across all critical parameters. The Bourns part offers the advantage of active product status with extended operating temperature capability (-55°C ~ 150°C versus -55°C ~ 125°C). Both parts maintain ROHS3 compliance and equivalent melting I²t characteristics. The DC cold resistance differential (0.018 Ohms versus 0.016 Ohms) is within acceptable tolerance for board mount fuse applications. Packaging availability in Tape & Reel format for the Bourns substitute supports standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the SF-1206SP500M-2 be used as a direct replacement for the 1206SFS500F/32-2 on existing PCBs?

A: Yes. Both components are housed in identical 1206 (3216 Metric) packages with matching footprints and mounting requirements. No PCB redesign is necessary.

Q: Are there electrical performance differences between these two fuses?

A: Both fuses share identical current rating (5A), voltage rating (32VDC), response time (slow blow), and breaking capacity (50A). The DC cold resistance values (0.016 Ohms versus 0.018 Ohms) are within acceptable tolerance for this application class.

Q: What is the significance of the product status difference?

A: The 1206SFS500F/32-2 is obsolete, meaning Littelfuse has discontinued production. The SF-1206SP500M-2 is active, ensuring long-term availability and supply chain continuity.

Q: Does the extended operating temperature range of the Bourns part affect compatibility?

A: No. The SF-1206SP500M-2 operates across -55°C ~ 150°C, which encompasses the original part's -55°C ~ 125°C range. This provides additional thermal margin without compromising compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1206SFS500F/32-2 and SF-1206SP500M-2 are ROHS3 compliant.