MF-PSML250/6-2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MF-PSML250/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. in the Multifuse® series. This surface mount component is designed for overcurrent protection in 6V circuits with a 2.5A hold current rating. The part is currently active in production with 739 units in stock. Substitute parts are identified when circuit voltage requirements differ while maintaining compatible electrical and mechanical characteristics within the 0805 (2012 Metric) package format.

Substiute Parts

MF-PSML250/6-2

Bourns Inc.In Stock: 800MF-PSML250/6-2 Datasheet

Current PartRFQ

MF-PSML250/12-2

Bourns Inc.In Stock: 1148MF-PSML250/12-2 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

The MF-PSML250/12-2 is identified as a substitute for the MF-PSML250/6-2 based on the following substitution criteria:

Compatible Parameters (Identical Across Both Parts):

• Series: Multifuse®, MF-PSML/X
• Type: Polymeric
• Current - Hold (Ih) (Max): 2.5 A
• Current - Trip (It): 5 A
• Current - Max: 50 A
• Time to Trip: 2 s
• Resistance - Initial (Ri) (Min): 3 mOhms
• Resistance - Post Trip (R1) (Max): 40 mOhms
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 0805 (2012 Metric), Concave
• Size / Dimension: 0.085" L x 0.053" W (2.15mm x 1.35mm)
• Thickness (Max): 0.055" (1.40mm)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 2A (4 Weeks)
• REACH Status: REACH Unaffected
• ECCN: EAR99
• HTSUS: 8533.40.8070

Differing Parameter:

• Voltage - Max: 6V (MF-PSML250/6-2) vs. 12V (MF-PSML250/12-2)

The substitute part accommodates higher voltage circuit requirements while maintaining identical current protection characteristics and mechanical compatibility within the same package footprint.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-PSML250/6-2 and MF-PSML250/12-2 are active production components from Bourns Inc. with ROHS3 compliance and identical regulatory certifications except for the addition of cUL approval on the 12V variant. Selection between these parts is determined by circuit voltage requirements. The MF-PSML250/6-2 is suitable for 6V maximum circuit applications, while the MF-PSML250/12-2 accommodates 12V maximum circuit applications. Both parts share identical current protection characteristics, thermal operating range, and mechanical footprint compatibility. The 12V variant provides expanded voltage range capability within the same package format.

Frequently Asked Questions (FAQ)

Q: Can the MF-PSML250/12-2 be used in place of the MF-PSML250/6-2?

A: The MF-PSML250/12-2 can be used in applications where the circuit voltage does not exceed 12V. The substitute part maintains identical current protection ratings (2.5A hold, 5A trip) and mechanical compatibility. Selection depends on the actual circuit voltage requirement.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical dimensions of 0.085" L x 0.053" W (2.15mm x 1.35mm) and maximum thickness of 0.055" (1.40mm). They are mechanically interchangeable on PCB layouts.

Q: What is the difference in approval certifications?

A: The MF-PSML250/12-2 includes cUL certification in addition to cURus and TUV certifications present on the MF-PSML250/6-2. Both parts meet ROHS3 compliance and REACH unaffected status.

Q: Do these parts have different thermal operating ranges?

A: No. Both parts operate across the identical temperature range of -40°C to 85°C.

Q: Are the electrical protection characteristics identical?

A: Yes. Both parts share identical current hold (2.5A), trip current (5A), maximum current (50A), time to trip (2s), initial resistance (3 mOhms minimum), and post-trip resistance (40 mOhms maximum) specifications.