SF-1206SP250-2 Equivalent & Substitute Parts

Part Overview

The SF-1206SP250-2 is a 2.5A surface mount board mount fuse rated for 32VDC operation in a 1206 (3216 Metric) package. Manufactured by Bourns Inc. under the SinglFuse™ SF-1206SP series, this component is classified as Active product status. The fuse features slow blow response characteristics and is UL-approved for industrial and commercial applications. Substitute parts may be required due to inventory availability, supply chain considerations, or design revision requirements while maintaining equivalent electrical and mechanical performance.

Substiute Parts

SF-1206SP250-2

Bourns Inc.In Stock: 1397SF-1206SP250-2 Datasheet

Current PartRFQ

SF-1206S250-2

Bourns Inc.In Stock: 13153SF-1206S250-2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The SF-1206S250-2 qualifies as a parametric equivalent to the SF-1206SP250-2 based on the following critical substitution parameters:

• Current Rating: 2.5 A (identical)
• Voltage Rating (DC): 32 V (identical)
• Response Time: Slow Blow (identical)
• Package / Case: 1206 (3216 Metric) (identical)
• Mounting Type: Surface Mount (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Breaking Capacity @ Rated Voltage: 50A (identical)
• Operating Temperature Range: -20°C ~ 105°C (identical)
• Physical Dimensions: 0.122" L x 0.061" W x 0.024" H (3.10mm x 1.55mm x 0.60mm) (identical)
• Approval Agency: UL (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical)

Both parts belong to the Bourns Inc. SinglFuse™ series and maintain Active product status. The substitution is valid for direct replacement in applications requiring 2.5A fuses at 32VDC with slow blow characteristics in surface mount 1206 packaging.

Parameter Comparison

Engineering Selection Recommendations

Both the SF-1206SP250-2 and SF-1206S250-2 are Active products manufactured by Bourns Inc. with identical electrical and mechanical specifications for 2.5A, 32VDC slow blow fuse applications. Both components carry UL approval and are ROHS3 compliant, meeting regulatory requirements for industrial and commercial deployment.

The SF-1206S250-2 offers higher inventory availability (13,068 pcs vs. 1,383 pcs) and provides specified DC cold resistance of 0.026 Ohms. The SF-1206SP250-2 exhibits a higher melting I²t value of 0.777 compared to 0.605 for the substitute part, indicating slightly different thermal response characteristics within the slow blow classification.

Selection between these parts should be based on supply chain requirements and application-specific thermal response needs, as both maintain identical rated parameters and certifications.

Frequently Asked Questions (FAQ)

Q: Can SF-1206S250-2 be used as a direct replacement for SF-1206SP250-2?

A: Yes. Both parts share identical current rating (2.5A), voltage rating (32VDC), response time (slow blow), package (1206), mounting type (surface mount), breaking capacity (50A), operating temperature range (-20°C ~ 105°C), and physical dimensions. Both are UL-approved and ROHS3 compliant.

Q: What is the difference in melting I²t between these parts?

A: The SF-1206SP250-2 has a melting I²t of 0.777, while the SF-1206S250-2 has a melting I²t of 0.605. Both remain classified as slow blow fuses and maintain the same rated current and voltage specifications.

Q: Are there any package or mounting differences?

A: No. Both parts use identical 1206 (3216 Metric) surface mount packaging with matching physical dimensions of 0.122" L x 0.061" W x 0.024" H (3.10mm x 1.55mm x 0.60mm).

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the SF-1206SP250-2 and SF-1206S250-2 are UL-approved, ROHS3 compliant, and REACH unaffected, meeting equivalent regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection depends on supply chain availability and application thermal response requirements. The SF-1206S250-2 offers higher inventory levels. Both parts are Active products suitable for new designs.