SF-1206F050-2 Equivalent & Substitute Parts

Part Overview

The SF-1206F050-2 is a 500 mA surface mount board mount fuse manufactured by Bourns Inc. under the SinglFuse™ SF-1206 series. This component is rated for 63 V DC operation with fast blow response characteristics and is housed in a 1206 (3216 Metric) package. The part is Active status and widely used in circuit protection applications requiring compact surface mount solutions. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory compliance align with the original specification.

Substiute Parts

SF-1206F050-2

Bourns Inc.In Stock: 8363SF-1206F050-2 Datasheet

Current PartRFQ

0466.500NR

Littelfuse Inc.In Stock: 154400466.500NR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SF-1206F050-2 is determined by strict alignment of the following parameters:

Current Rating: 500 mA (exact match required) Voltage Rating: 63 V DC minimum (AC rating acceptable as supplementary) Response Time: Fast Blow (matching protection profile) Package / Case: 1206 (3216 Metric) (mechanical and footprint compatibility) Mounting Type: Surface Mount (assembly process compatibility) Fuse Type: Board Mount (Cartridge Style Excluded) Breaking Capacity: 50 A @ rated voltage Regulatory Compliance: UL or equivalent recognized approval agencies

The substitute part 0466.500NR (Littelfuse Inc., SlimLine™ 466 series) meets all critical substitution criteria and is classified as an equivalent alternative.

Parameter Comparison

Engineering Selection Recommendations

Both SF-1206F050-2 and 0466.500NR are Active status components with full regulatory compliance (UL certification). Selection between these parts is based on application-specific requirements:

The SF-1206F050-2 operates across a wider temperature range (-40°C to 105°C) and is suitable for applications requiring extended high-temperature performance. The 0466.500NR provides dual AC/DC voltage rating certification (CSA and UL) and lower DC cold resistance (0.248 Ohms vs. 0.59 Ohms), which may be advantageous in low-resistance circuit designs. Both components are ROHS3 compliant with MSL 1 rating, indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can 0466.500NR replace SF-1206F050-2 in existing designs? A: Yes. Both parts share identical current rating (500 mA), DC voltage rating (63 V), response time (Fast Blow), package (1206), and breaking capacity (50 A). Mechanical footprint compatibility is confirmed. Verify application temperature requirements, as SF-1206F050-2 supports -40°C to 105°C while 0466.500NR supports -55°C to 90°C.

Q: What is the significance of the Melting I²t difference? A: Melting I²t (0.011 for SF-1206F050-2 vs. 0.006 for 0466.500NR) indicates thermal energy dissipation characteristics. The lower value in 0466.500NR reflects faster thermal response. Both values are within the 500 mA fast blow classification and do not affect substitution eligibility for standard circuit protection applications.

Q: Are there packaging or moisture sensitivity concerns? A: Both parts are supplied in Tape & Reel (TR) packaging with MSL 1 (Unlimited) rating. No moisture sensitivity precautions are required during storage or handling. Mechanical dimensions are nearly identical (SF-1206F050-2: 3.10mm x 1.55mm x 0.60mm; 0466.500NR: 3.18mm x 1.52mm x 0.58mm), confirming PCB footprint compatibility.

Q: Which part should be selected for new designs? A: Both parts are Active status and suitable for new designs. Selection depends on supply chain availability, cost considerations, and application temperature range. Verify DC cold resistance requirements, as 0466.500NR (0.248 Ohms) differs from SF-1206F050-2 (0.59 Ohms) and may impact circuit behavior in sensitive applications.