Equivalent & Substitute Parts for MF-SM150/33-2-99

Part Overview

The MF-SM150/33-2-99 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 33V maximum voltage and 1.5A hold current. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain identical electrical performance and mechanical compatibility within the 2-SMD surface mount package.

Substiute Parts

MF-SM150/33-2-99

Bourns Inc.In Stock: 7104MF-SM150/33-2-99 Datasheet

Current PartRFQ

MF-SM150/33-2

Bourns Inc.In Stock: 3679MF-SM150/33-2 Datasheet

Parametric EquivalentRFQ

PFSM.150.33.2

SCHURTER Inc.In Stock: 2153PFSM.150.33.2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Voltage rating: 33V maximum
• Current hold (Ih): 1.5A maximum
• Current trip (It): 3A
• Current maximum: 40A
• Time to trip: 5 seconds
• Initial resistance (Ri): 60 mOhms minimum
• Post-trip resistance (R1): 230 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Package type: 2-SMD surface mount
• Physical dimensions: 0.344" L x 0.264" W, 0.118" maximum thickness
• Regulatory compliance: AEC-Q200, cURus, TUV approval

Two active equivalent parts meet these criteria and are suitable for direct substitution in applications currently using the MF-SM150/33-2-99.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with full regulatory compliance. MF-SM150/33-2 from Bourns Inc. maintains the same manufacturer lineage as the obsolete part and is available in Cut Tape and Digi-Reel packaging options. PFSM.150.33.2 from SCHURTER Inc. provides an alternative source with identical electrical and mechanical specifications, available in Tape & Reel packaging.

Selection between these equivalents should be based on supply chain requirements, packaging preferences, and procurement lead times. Both parts satisfy AEC-Q200 automotive qualification, cURus and TUV approvals, and ROHS3 compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can MF-SM150/33-2 directly replace MF-SM150/33-2-99 in existing designs?

A: Yes. Both parts are polymeric PTC resettable fuses with identical electrical ratings (33V, 1.5A hold current, 3A trip current), resistance characteristics, and operating temperature range. The 2-SMD package dimensions and mounting requirements are equivalent.

Q: What is the difference between the Bourns and SCHURTER substitute options?

A: Electrical and mechanical specifications are identical across all three parts. The primary differences are manufacturer source and packaging format. Bourns offers Cut Tape and Digi-Reel options, while SCHURTER provides Tape & Reel packaging.

Q: Are there any compliance or certification differences between the substitutes?

A: No. All three parts carry AEC-Q200 ratings, cURus and TUV approvals, and ROHS3 compliance status. Regulatory requirements are fully satisfied by either substitute.

Q: Does the packaging format affect electrical performance?

A: No. Packaging format (Cut Tape, Digi-Reel, or Tape & Reel) does not affect component electrical characteristics or performance. Selection should be based on assembly line requirements and inventory management practices.

Q: What is the moisture sensitivity level for these parts?

A: MF-SM150/33-2 has MSL 1 (Unlimited). PFSM.150.33.2 lists MSL as Not Applicable. Both designations indicate minimal moisture sensitivity for standard handling and storage conditions.