SF-1206SP500-2 Equivalent & Substitute Parts

Part Overview

The SF-1206SP500-2 is a surface mount board fuse manufactured by Bourns Inc. under the SinglFuse™ SF-1206SP series. This slow-blow fuse is rated for 5 A at 32 V DC and is housed in a 1206 (3216 Metric) package. The component is designed for circuit protection in surface mount applications where cartridge-style fuses are not suitable. The part maintains Active product status with full UL approval and ROHS3 compliance. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component interchangeability in board-level designs.

Substiute Parts

SF-1206SP500-2

Bourns Inc.In Stock: 2083SF-1206SP500-2 Datasheet

Current PartRFQ

SF-1206S500-2

Bourns Inc.In Stock: 32448SF-1206S500-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SF-1206SP500-2 is determined by strict alignment of the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating (DC): 32 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match required)
• Breaking Capacity @ Rated Voltage: 50 A (exact match required)
• Operating Temperature Range: -20°C ~ 105°C (exact match required)
• Approval Agency: UL (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

The SF-1206S500-2 meets all substitution criteria and is classified as a parametric equivalent. Both parts share identical electrical ratings, mechanical dimensions, and regulatory compliance status. Differences in internal characteristics such as Melting I²t and DC Cold Resistance do not affect functional interchangeability in circuit protection applications where the specified current and voltage ratings are the controlling parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the SF-1206SP500-2 and SF-1206S500-2 are Active products with identical UL approval and ROHS3 compliance certification. Selection between these parts is based on availability and inventory status. The SF-1206S500-2 maintains significantly higher inventory levels (32,364 Pcs vs. 2,068 Pcs), making it the preferred choice for procurement when lead time and stock availability are considerations. Both parts satisfy all electrical, mechanical, and regulatory requirements for direct substitution in 1206 surface mount fuse applications rated at 5 A / 32 V DC with slow-blow response characteristics.

Frequently Asked Questions (FAQ)

Q: Can SF-1206S500-2 be used as a direct replacement for SF-1206SP500-2?

A: Yes. Both parts are manufactured by Bourns Inc. and share identical electrical ratings (5 A / 32 V DC), response time (Slow Blow), package dimensions (1206 / 3216 Metric), and regulatory compliance (UL approval, ROHS3). They are functionally interchangeable in circuit protection applications.

Q: What is the significance of the different Melting I²t values?

A: Melting I²t (5.51 for SF-1206SP500-2 and 2.533 for SF-1206S500-2) represents the thermal energy required to melt the fuse element. Both values fall within the acceptable range for 5 A slow-blow fuses and do not affect substitution eligibility when the current and voltage ratings remain constant.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.122" L x 0.061" W x 0.024" H (3.10mm x 1.55mm x 0.60mm) and are packaged in the 1206 (3216 Metric) case. They are mechanically interchangeable on PCB layouts designed for this package type.

Q: What is the DC Cold Resistance specification?

A: DC Cold Resistance (0.01 Ohms for SF-1206S500-2) is the resistance of the fuse element at room temperature. This parameter does not affect functional interchangeability for circuit protection applications where current and voltage ratings are the primary selection criteria.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across the identical temperature range of -20°C to 105°C, ensuring compatibility in applications with equivalent thermal requirements.

Q: What is the breaking capacity specification?

A: Breaking capacity (50 A @ rated voltage for both parts) defines the maximum current the fuse can safely interrupt without damage. Both parts meet this specification identically.