MF-RX160/72-AP Equivalent & Substitute Parts

Part Overview

The MF-RX160/72-AP is a polymeric PTC resettable fuse manufactured by Bourns Inc. under the Multifuse® series. This component is designed for overcurrent protection in 72V circuits with a 1.6A hold current rating. The part is active in production and widely used in industrial and electronic equipment requiring automatic reset protection without component replacement.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the critical parameters that define this product category: voltage rating, hold current, trip current, resistance characteristics, operating temperature range, and physical form factor.

Substiute Parts

MF-RX160/72-AP

Bourns Inc.In Stock: 873MF-RX160/72-AP Datasheet

Current PartRFQ

RXEF160-AP

Littelfuse Inc.In Stock: 1080RXEF160-AP Datasheet

SimilarRFQ

RXEF160K-2

LittelfuseIn Stock: 5575RXEF160K-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RX160/72-AP is determined by strict equivalence across the following critical parameters:

• Voltage rating: 72V maximum
• Hold current (Ih): 1.6A maximum
• Trip current (It): 3.2A
• Initial resistance (Ri): 90 mOhms minimum
• Post-trip resistance (R1): 220 mOhms maximum
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through hole radial disc form factor
• Lead spacing: 5.10mm nominal

Both identified substitute parts—RXEF160-AP and RXEF160K-2 from Littelfuse Inc.—meet all electrical specifications and mechanical requirements. These parts are manufactured under the PolySwitch® series and maintain functional equivalence with the original MF-RX160/72-AP component.

Parameter Comparison

Engineering Selection Recommendations

All three parts—MF-RX160/72-AP, RXEF160-AP, and RXEF160K-2—are active production components with ROHS3 compliance and equivalent electrical characteristics. Selection between these parts may be based on:

• Packaging format: MF-RX160/72-AP is supplied in Tape & Box format; both Littelfuse alternatives are supplied in Cut Tape format
• Approval certifications: MF-RX160/72-AP carries cURus and TUV approvals; RXEF160-AP and RXEF160K-2 carry CQC, CSA, TUV, and UL approvals
• Inventory availability: RXEF160K-2 has the highest stock level at 5479 pieces
• Lead spacing tolerance: MF-RX160/72-AP specifies 5.10mm; Littelfuse parts specify 5.05mm (0.05mm difference within typical PCB tolerance)

Frequently Asked Questions (FAQ)

Q: Can RXEF160-AP or RXEF160K-2 be used as direct replacements for MF-RX160/72-AP?

A: Yes. Both Littelfuse parts meet all electrical specifications and mechanical requirements. The 0.05mm difference in lead spacing (5.10mm vs. 5.05mm) is within standard PCB manufacturing tolerances and does not affect functional compatibility.

Q: What is the difference between RXEF160-AP and RXEF160K-2?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format (both Cut Tape) and inventory availability. RXEF160K-2 has significantly higher stock levels.

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

A: MF-RX160/72-AP carries cURus and TUV approvals. RXEF160-AP and RXEF160K-2 carry CQC, CSA, TUV, and UL approvals. The additional certifications on Littelfuse parts may be advantageous for applications requiring broader regulatory compliance.

Q: What parameters must remain constant for substitution?

A: Voltage rating (72V), hold current (1.6A), trip current (3.2A), resistance characteristics (Ri 90 mOhms min, R1 220 mOhms max), operating temperature range (-40 to 85°C), and through-hole radial disc form factor must all be maintained.

Q: Does the packaging format affect electrical performance?

A: No. Tape & Box and Cut Tape formats are packaging and delivery methods only. They do not affect the electrical or mechanical properties of the component itself.