Bourns MF-R050-2-17 Equivalent & Substitute Parts

Part Overview

The Bourns MF-R050-2-17 is a polymeric PTC resettable fuse designed for circuit protection in through-hole applications. This component operates at a maximum voltage of 60V with a hold current of 500 mA and a trip current of 1 A. The device is housed in a radial disc package with 0.201" lead spacing, suitable for standard PCB mounting.

The MF-R050-2-17 is an active product with AEC-Q200 ratings and multiple approval agencies including cUL, cURus, TUV, and UL. It maintains ROHS3 compliance and is unaffected by REACH regulations.

Alternative part numbers within the same electrical and mechanical specification range are available to accommodate different packaging requirements and inventory availability.

Substiute Parts

MF-R050-2-17

Bourns Inc.In Stock: 684MF-R050-2-17 Datasheet

Current PartRFQ

MF-R050-2

Bourns Inc.In Stock: 13248MF-R050-2 Datasheet

Parametric EquivalentRFQ

MF-R050-AP

Bourns Inc.In Stock: 5644MF-R050-AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-R050-2-17 are determined by electrical and mechanical parameter equivalence within the Bourns Multifuse® MF-R series. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match):

• Maximum voltage: 60V
• Hold current (Ih): 500 mA
• Trip current (It): 1 A
• Maximum current: 40 A
• Time to trip: 4 s
• Initial resistance (Ri): 410 mOhms minimum
• Post-trip resistance (R1): 1.17 Ohms maximum
• Operating temperature range: -40°C to 85°C

Mechanical Parameters (Must Match):

• Mounting type: Through Hole
• Package type: Radial, Disc
• Physical dimensions: 0.311" diameter × 0.122" thickness (7.90mm × 3.10mm)
• Lead spacing: 0.201" (5.10mm)
• Height seated: 0.539" maximum (13.70mm)

Compliance Parameters (Must Match):

• RoHS3 compliance
• REACH unaffected status
• Moisture sensitivity level: 1 (Unlimited)

The primary difference between substitute parts lies in packaging format (Tape & Reel versus Cut Tape) and approval agency certifications. All substitute parts share the same base product number MF-R050 and maintain identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—MF-R050-2-17, MF-R050-2, and MF-R050-AP—are active products from Bourns Inc. and are electrically and mechanically equivalent for circuit protection applications requiring 60V, 500 mA hold current specifications.

MF-R050-2-17 (Tape & Reel Packaging): This configuration is suitable for high-volume automated assembly operations. It includes AEC-Q200 ratings and approvals from cUL, cURus, TUV, and UL. This part number is the primary specification for applications requiring automotive-grade reliability.

MF-R050-2 (Cut Tape Packaging): This alternative provides the same electrical and mechanical performance with Cut Tape packaging. It carries approvals from cURus and TUV. This format is appropriate for lower-volume production or manual assembly processes.

MF-R050-AP (Cut Tape Packaging): This alternative also provides identical electrical and mechanical performance with Cut Tape packaging and cURus and TUV approvals. This format is appropriate for lower-volume production or manual assembly processes.

Selection between these parts depends on assembly method requirements and approval agency certifications needed for the end application. All parts maintain ROHS3 compliance and unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can MF-R050-2 or MF-R050-AP be used as direct replacements for MF-R050-2-17?

A: Yes. All three part numbers share identical electrical specifications (60V maximum voltage, 500 mA hold current, 1 A trip current, 4 s time to trip) and mechanical dimensions (0.311" diameter, 0.122" thickness, 0.201" lead spacing). The primary difference is packaging format: MF-R050-2-17 uses Tape & Reel packaging, while MF-R050-2 and MF-R050-AP use Cut Tape packaging.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is designed for automated pick-and-place assembly equipment and is standard for high-volume production. Cut Tape (CT) packaging provides individual component strips and is suitable for manual assembly, lower-volume production, or component-level distribution.

Q: Are there differences in approval certifications between these parts?

A: MF-R050-2-17 includes AEC-Q200 ratings and approvals from cUL, cURus, TUV, and UL. MF-R050-2 and MF-R050-AP carry approvals from cURus and TUV. Applications requiring AEC-Q200 automotive-grade certification must use MF-R050-2-17.

Q: Do all three parts meet RoHS and REACH compliance requirements?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected. All share the same ECCN (EAR99) and HTSUS (8533.40.8070) classifications.

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

A: All three parts have a Moisture Sensitivity Level (MSL) of 1, which indicates unlimited shelf life without moisture control requirements.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, from an electrical and mechanical standpoint. All three parts have identical lead spacing (0.201"), physical diameter (0.311"), thickness (0.122"), and seated height (0.539"). PCB footprints designed for one part number accommodate all three.

Q: What is the operating temperature range for these components?

A: All three parts operate across a temperature range of -40°C to 85°C, suitable for industrial and automotive applications.

Q: Are there inventory considerations when selecting between these part numbers?

A: Inventory availability varies by packaging format. MF-R050-2-17 (Tape & Reel) has 655 pieces in stock. MF-R050-2 (Cut Tape) has 13,188 pieces in stock. MF-R050-AP (Cut Tape) has 5,601 pieces in stock. Selection may depend on required delivery timeline and volume needs.