SRF2012-201Y Equivalent & Substitute Parts

Part Overview

The SRF2012-201Y is a 2-line common mode choke (CMC) surface mount component manufactured by Bourns Inc., designed for electromagnetic interference (EMI) filtering in signal line applications. This component features 200 ohms impedance at 100 MHz with a maximum current rating of 330mA and operates across the temperature range of -55°C to 125°C. The SRF2012-201Y is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	SRF2012-201Y
Manufacturer	Bourns Inc.
Number of Lines	2
Impedance @ Frequency	200 Ohms @ 100 MHz
Current Rating (Max)	330mA
DC Resistance (DCR) (Max)	350mOhm
Voltage Rating - DC	50V
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Size / Dimension	0.081" L x 0.049" W (2.05mm x 1.25mm)
Height (Max)	0.057" (1.45mm)
Package / Case	Horizontal, 4 PC Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SRF2012-201Y is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Impedance value: 200 Ohms @ 100 MHz (must match exactly)
Number of lines: 2 (must match exactly)
DC Resistance (DCR): Maximum 350mOhm for primary specification; up to 400mOhm acceptable for active alternatives
Current rating: Minimum 300mA required; original part rated 330mA
Voltage rating: 50V DC minimum
Operating temperature range: Must support -40°C to 125°C minimum

Mechanical Compatibility Criteria:

Mounting type: Surface Mount (must match)
Package configuration: Horizontal, 4 PC Pad (must match)
Physical dimensions: Nominal 2.0mm x 1.2mm footprint acceptable with height ≤ 1.45mm

Compliance Criteria:

RoHS3 compliance required
MSL rating: 1 (Unlimited) preferred

The substitute parts SRF2012-201YA and SRF2012A-201YA meet these criteria with active product status and improved availability.

Parameter Comparison

Parameter	SRF2012-201Y	SRF2012-201YA	SRF2012A-201YA
Manufacturer	Bourns Inc.	Bourns Inc.	Bourns Inc.
Number of Lines	2	2	2
Impedance @ Frequency	200 Ohms @ 100 MHz	200 Ohms @ 100 MHz	200 Ohms @ 100 MHz
Current Rating (Max)	330mA	300mA	300mA
DC Resistance (DCR) (Max)	350mOhm	400mOhm	400mOhm
Voltage Rating - DC	50V	50V	50V
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.081" L x 0.049" W (2.05mm x 1.25mm)	0.079" L x 0.047" W (2.00mm x 1.20mm)	0.079" L x 0.047" W (2.00mm x 1.20mm)
Height (Max)	0.057" (1.45mm)	0.055" (1.40mm)	0.055" (1.40mm)
Package / Case	Horizontal, 4 PC Pad	Horizontal, 4 PC Pad	Horizontal, 4 PC Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active
Ratings	—	—	AEC-Q200

Engineering Selection Recommendations

SRF2012-201YA is the direct functional equivalent with active product status. This part maintains identical electrical specifications (200 Ohms @ 100 MHz impedance, 2-line configuration) and mechanical compatibility. The reduced current rating (300mA vs. 330mA) and slightly increased DCR (400mOhm vs. 350mOhm) are within acceptable tolerance for most applications. The narrower operating temperature range (-40°C to 125°C vs. -55°C to 125°C) applies only to extreme low-temperature environments. This part is recommended for standard applications requiring immediate availability.

SRF2012A-201YA provides the same electrical and mechanical specifications as SRF2012-201YA with the addition of AEC-Q200 automotive qualification. This part is suitable for applications requiring automotive-grade reliability and traceability. Selection of this part is appropriate when automotive compliance or enhanced quality assurance documentation is required.

Both substitute parts are ROHS3 compliant with MSL rating 1 (Unlimited), matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can SRF2012-201YA directly replace SRF2012-201Y in existing designs?

A: Yes. Both parts share identical impedance (200 Ohms @ 100 MHz), line configuration (2-line), voltage rating (50V DC), and mechanical footprint (Horizontal, 4 PC Pad). The current rating difference (300mA vs. 330mA) and DCR increase (400mOhm vs. 350mOhm) are minor and acceptable for most signal line filtering applications. Verify application current requirements do not exceed 300mA.

Q: What is the difference between SRF2012-201YA and SRF2012A-201YA?

A: Both parts are electrically and mechanically identical. SRF2012A-201YA carries AEC-Q200 automotive qualification, providing enhanced reliability documentation and traceability for automotive applications. Select SRF2012A-201YA when automotive compliance is required; otherwise, SRF2012-201YA is suitable.

Q: Does the operating temperature range difference affect substitution?

A: The SRF2012-201Y operates from -55°C to 125°C, while substitutes operate from -40°C to 125°C. This difference is relevant only for applications requiring operation below -40°C. For standard industrial and commercial temperature ranges, this difference is not a limiting factor.

Q: Are the physical dimensions compatible with the original PCB layout?

A: Yes. The substitute parts (2.00mm x 1.20mm, height 1.40mm) are slightly smaller than the original (2.05mm x 1.25mm, height 1.45mm) and maintain the same Horizontal, 4 PC Pad configuration. PCB footprints designed for the original part accommodate the substitute parts without modification.

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

A: SRF2012-201YA and SRF2012A-201YA are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Confirm packaging requirements with procurement specifications.

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