SRF2012-300Y Common Mode Choke Equivalent & Substitute Parts

Part Overview

The SRF2012-300Y is a 2-line common mode choke manufactured by Bourns Inc., designed for surface mount applications with 30 Ohms impedance at 100 MHz and 450mA maximum current rating. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 125°C with 50V DC voltage rating and 200mOhm maximum DC resistance.

Substiute Parts

SRF2012-300Y

Bourns Inc.In Stock: 739SRF2012-300Y Datasheet

Current PartRFQ

SRF2012-300YA

Bourns Inc.In Stock: 2356SRF2012-300YA Datasheet

SimilarRFQ

ICM0805ER300M

Vishay DaleIn Stock: 831ICM0805ER300M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SRF2012-300Y are qualified based on the following critical parameters that determine functional equivalence:

• Number of Lines: Must be 2-line configuration
• Impedance @ Frequency: Must be 30 Ohms @ 100 MHz
• DC Resistance (DCR): Must not exceed 200mOhm
• Voltage Rating - DC: Must be rated for 50V minimum
• Mounting Type: Must be Surface Mount
• Package / Case: Must be Horizontal, 4 PC Pad configuration

Two substitute parts meet these criteria: the SRF2012-300YA (Bourns Inc., active product status) and the ICM0805ER300M (Vishay Dale, active product status). Both maintain identical impedance, DC resistance, voltage rating, and package configuration as the original part.

Parameter Comparison

Engineering Selection Recommendations

SRF2012-300YA is the primary substitute for the SRF2012-300Y. Both parts are manufactured by Bourns Inc. within the same SRF2012 series family. The SRF2012-300YA maintains all critical electrical parameters and is classified as an active product with current manufacturing support. The maximum current rating is reduced from 450mA to 400mA, and the operating temperature minimum is raised from -55°C to -40°C. These differences require evaluation against specific application requirements. The SRF2012-300YA is available in Tape & Reel packaging.

ICM0805ER300M is an alternative substitute manufactured by Vishay Dale. This part maintains the 450mA current rating and identical impedance, DC resistance, and voltage specifications. The operating temperature range is -40°C to 85°C, which is narrower than the original part. The ICM0805ER300M is classified as an active product and is available in Tape & Reel packaging. Both substitute parts are ROHS3 compliant and carry identical moisture sensitivity levels.

Frequently Asked Questions (FAQ)

Q: Can the SRF2012-300YA directly replace the SRF2012-300Y in all applications?

A: The SRF2012-300YA is electrically equivalent for impedance, DC resistance, and voltage rating. However, the current rating is reduced to 400mA (from 450mA) and the minimum operating temperature is -40°C (from -55°C). Applications requiring the full 450mA current capacity or operation below -40°C require evaluation of the ICM0805ER300M or confirmation that the reduced specifications are acceptable.

Q: What are the physical differences between these parts?

A: The SRF2012-300Y measures 0.081" L x 0.049" W with 0.057" maximum height. Both substitutes measure 0.079" L x 0.047" W, with the SRF2012-300YA at 0.055" height and the ICM0805ER300M at 0.057" height. All three parts use Horizontal, 4 PC Pad packaging and are suitable for surface mount assembly.

Q: Are there compliance or certification differences?

A: All three parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both substitute parts maintain the same compliance status as the original SRF2012-300Y.

Q: Which substitute should be selected for new designs?

A: For applications requiring 450mA current capacity, the ICM0805ER300M is the appropriate selection. For applications where 400mA is sufficient, the SRF2012-300YA offers the advantage of being from the same manufacturer and series as the original part. Operating temperature requirements should be confirmed against application specifications.