SRF2012-181Y Equivalent & Substitute Parts

Part Overview

The SRF2012-181Y is a 2-line common mode choke (CMC) surface mount component manufactured by Bourns Inc., designed for signal line filtering applications. This part operates at 180 Ohms impedance @ 100 MHz with a maximum current rating of 330mA and DC resistance of 350mOhm. The component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

SRF2012-181Y

Bourns Inc.In Stock: 996SRF2012-181Y Datasheet

Current PartRFQ

SRF2012-181YA

Bourns Inc.In Stock: 4198SRF2012-181YA Datasheet

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SRF2012A-181YA

Bourns Inc.In Stock: 1086SRF2012A-181YA Datasheet

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ICM0805ER181M

Vishay DaleIn Stock: 859ICM0805ER181M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the SRF2012-181Y is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Impedance @ 100 MHz: 180 Ohms (exact match required)
• Number of Lines: 2 (exact match required)
• DC Resistance (DCR): 350mOhm maximum (exact match required)
• Voltage Rating - DC: 50V minimum
• Current Rating: 330mA minimum

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount (exact match required)
• Package / Case: Horizontal, 4 PC Pad (exact match required)
• Size / Dimension: Compatible with 0.081" L x 0.049" W footprint
• Height: Compatible with 0.057" maximum height

Compliance Criteria:

• RoHS3 Compliant (required)
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must meet or exceed all electrical parameters while maintaining mechanical compatibility with the original PCB layout and assembly process.

Parameter Comparison

Engineering Selection Recommendations

SRF2012-181YA (Bourns Inc., Active Status)

This part is a direct electrical equivalent with improved current rating (350mA vs. 330mA). Dimensions are slightly reduced (2.00mm x 1.20mm vs. 2.05mm x 1.25mm), which is compatible with the original footprint. Operating temperature range is narrower (-40°C ~ 125°C vs. -55°C ~ 125°C). This part is actively manufactured and represents the primary substitute for the obsolete SRF2012-181Y.

SRF2012A-181YA (Bourns Inc., Active Status, AEC-Q200 Rated)

This part meets all electrical specifications with 350mA current rating and includes AEC-Q200 automotive qualification. Dimensions and height are identical to SRF2012-181YA. Operating temperature range is -40°C ~ 125°C. This part is suitable for applications requiring automotive-grade components.

ICM0805ER181M (Vishay Dale, Active Status)

This part matches the original current rating (330mA) and operating temperature range (-40°C ~ 85°C). All electrical parameters are equivalent. Dimensions are 2.00mm x 1.20mm, compatible with the original footprint. This part provides a cross-manufacturer alternative from Vishay Dale.

Frequently Asked Questions (FAQ)

Q: Can SRF2012-181YA be used as a direct replacement for SRF2012-181Y?

A: Yes. Both parts have identical impedance (180 Ohms @ 100 MHz), DC resistance (350mOhm), voltage rating (50V), and package configuration (Horizontal, 4 PC Pad). The SRF2012-181YA has a higher current rating (350mA vs. 330mA) and is actively manufactured. Dimensions are slightly smaller but compatible with the original footprint.

Q: What is the difference between SRF2012-181YA and SRF2012A-181YA?

A: Both parts have identical electrical specifications and dimensions. The primary difference is that SRF2012A-181YA includes AEC-Q200 automotive qualification and is supplied in Tape & Reel packaging, while SRF2012-181YA is available in Cut Tape & Digi-Reel packaging. Select SRF2012A-181YA for automotive applications.

Q: Can ICM0805ER181M from Vishay Dale replace the Bourns SRF2012-181Y?

A: Yes. The ICM0805ER181M meets all critical electrical parameters: 180 Ohms @ 100 MHz impedance, 330mA current rating, 350mOhm DC resistance, and 50V voltage rating. Package configuration and dimensions are compatible. This part provides a cross-manufacturer alternative.

Q: Are there operating temperature limitations when substituting parts?

A: The original SRF2012-181Y operates from -55°C ~ 125°C. SRF2012-181YA and SRF2012A-181YA operate from -40°C ~ 125°C, which is suitable for most commercial and industrial applications. ICM0805ER181M operates from -40°C ~ 85°C, which has a reduced upper temperature limit. Verify application temperature requirements before selection.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed (SRF2012-181YA, SRF2012A-181YA, and ICM0805ER181M) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the original part specifications.

Q: What packaging options are available for these substitute parts?

A: SRF2012-181YA is available in Cut Tape (CT) & Digi-Reel packaging. SRF2012A-181YA is supplied in Tape & Reel (TR) packaging. ICM0805ER181M is supplied in Tape & Reel (TR) packaging. Select packaging based on assembly process requirements and volume.