SRF2012-161Y Equivalent & Substitute Parts

Part Overview

The SRF2012-161Y is a 2-line common mode choke (CMC) manufactured by Bourns Inc., designed for surface mount applications with 160 Ohms impedance at 100 MHz and 300mA maximum current rating. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The SRF2012-161Y series provides electromagnetic interference (EMI) filtering for signal line applications in compact form factors.

Substiute Parts

SRF2012-161Y

Bourns Inc.In Stock: 1091SRF2012-161Y Datasheet

Current PartRFQ

SRF2012-161YA

Bourns Inc.In Stock: 2088SRF2012-161YA Datasheet

SimilarRFQ

SRF2012A-161YA

Bourns Inc.In Stock: 1630SRF2012A-161YA Datasheet

SimilarRFQ

SRF3216-161Y

Bourns Inc.In Stock: 3244SRF3216-161Y Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SRF2012-161Y are qualified based on the following critical parameters that determine functional compatibility:

Core Electrical Parameters (Must Match):

• Number of Lines: 2
• Impedance @ Frequency: 160 Ohms @ 100 MHz
• Voltage Rating - DC: 50V
• Package / Case: Horizontal, 4 PC Pad

Allowable Variations:

• Current Rating (Max): May be equal to or greater than 300mA
• DC Resistance (DCR) (Max): May be equal to or lower than 400mOhm
• Operating Temperature: May be equal to or wider than -55°C ~ 125°C
• Physical Dimensions: Minor variations acceptable within surface mount assembly constraints
• Mounting Type: Surface Mount (consistent across all substitutes)

The substitute parts are grouped into two categories: direct series upgrades (SRF2012A series) and parametric equivalents with larger form factors (SRF3216 series). All substitutes maintain the same electrical performance at the specified impedance frequency while offering improved current handling or automotive-grade certifications.

Parameter Comparison

Engineering Selection Recommendations

SRF2012-161YA is the primary direct substitute for the obsolete SRF2012-161Y. Both parts share identical electrical specifications (160 Ohms @ 100 MHz, 50V DC rating, 2-line configuration) with improved performance characteristics: 350mA current rating versus 300mA, and reduced DCR of 350mOhm versus 400mOhm. The SRF2012-161YA is active in production with Tape & Reel packaging. The operating temperature range narrows to -40°C ~ 125°C, which is acceptable for most commercial and industrial applications. Physical dimensions remain nearly identical, ensuring PCB layout compatibility.

SRF2012A-161YA provides an alternative with identical electrical performance to SRF2012-161YA and adds AEC-Q200 automotive qualification. This part is suitable for designs requiring automotive-grade reliability and traceability. The SRF2012A-161YA maintains the same compact form factor and active production status.

SRF3216-161Y is a parametric equivalent with identical electrical specifications but in a larger form factor (0.126" L x 0.063" W versus 0.081" L x 0.049" W). This part is suitable only when PCB space constraints are not limiting and the larger footprint is acceptable. The SRF3216-161Y maintains the full operating temperature range (-55°C ~ 125°C) of the original part and is active in production.

For designs with strict space requirements and no automotive qualification mandate, SRF2012-161YA is the recommended substitute. For automotive applications, SRF2012A-161YA is specified. The SRF3216-161Y is selected only when the larger package footprint does not conflict with PCB layout requirements.

Frequently Asked Questions (FAQ)

Q: Can SRF2012-161YA directly replace SRF2012-161Y without PCB modifications?

A: Yes. The SRF2012-161YA maintains the same 2-line common mode choke electrical specifications (160 Ohms @ 100 MHz, 50V DC rating) and identical package configuration (Horizontal, 4 PC Pad). Physical dimensions are nearly identical (0.079" L x 0.047" W versus 0.081" L x 0.049" W), allowing direct substitution on existing PCB layouts without design changes.

Q: What is the difference between SRF2012-161YA and SRF2012A-161YA?

A: Both parts share identical electrical performance (160 Ohms @ 100 MHz, 350mA, 350mOhm DCR, 50V DC rating) and physical dimensions. The SRF2012A-161YA includes AEC-Q200 automotive qualification and is designated for automotive and high-reliability applications. The SRF2012-161YA is suitable for commercial and industrial applications without automotive requirements.

Q: When should SRF3216-161Y be used instead of SRF2012-161YA?

A: The SRF3216-161Y is selected when the larger form factor (0.126" L x 0.063" W) does not conflict with PCB layout constraints and when the full operating temperature range (-55°C ~ 125°C) is required. The SRF2012-161YA has a narrower operating range (-40°C ~ 125°C). For space-constrained designs, SRF2012-161YA is the appropriate choice.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts (SRF2012-161YA, SRF2012A-161YA, and SRF3216-161Y) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the environmental compliance of the original SRF2012-161Y.

Q: What is the impact of reduced DCR in substitute parts?

A: The substitute parts feature reduced DC Resistance (350mOhm versus 400mOhm), which results in lower power dissipation and improved thermal performance. This is a beneficial characteristic that does not affect electrical compatibility or impedance performance at 100 MHz.

Q: Can SRF2012-161YA be used in applications requiring -55°C minimum operating temperature?

A: No. The SRF2012-161YA operating temperature range is -40°C ~ 125°C. Applications requiring -55°C minimum temperature must use SRF3216-161Y, which maintains the full -55°C ~ 125°C range of the original SRF2012-161Y.