SD12-101-R Equivalent & Substitute Parts

Part Overview

The SD12-101-R is a 100 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 308 mA continuous current with a DC resistance of 2.64 Ohm and operates across the temperature range of -40°C to 85°C. The part is RoHS compliant and classified as Active product status. Equivalent parts are identified when design requirements permit substitution based on matching or compatible electrical and mechanical parameters within specified tolerances.

Substiute Parts

SD12-101-R

Eaton - Electronics DivisionIn Stock: 757SD12-101-R Datasheet

Current PartRFQ

SRR4011-101YL

Bourns Inc.In Stock: 2200SRR4011-101YL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SD12-101-R with the SRR4011-101YL is permissible based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance value: 100 µH (both parts)
• Core type: Ferrite drum core, wirewound, shielded (both parts)
• Mounting: Surface mount (both parts)
• Saturation current: 273 mA (SD12-101-R) vs. 270 mA (SRR4011-101YL) — within acceptable margin
• Current rating: 308 mA (SD12-101-R) vs. 310 mA (SRR4011-101YL) — equivalent performance
• DC resistance: 2.64 Ohm (SD12-101-R) vs. 2.4 Ohm max (SRR4011-101YL) — acceptable variance
• Inductance test frequency: 100 kHz (both parts)
• Compliance: Both RoHS compliant, MSL 1 (Unlimited)

Tolerance Consideration: The SD12-101-R specifies ±20% inductance tolerance, while the SRR4011-101YL specifies ±30%. The wider tolerance of the substitute part accommodates the tighter tolerance of the original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SD12-101-R The SD12-101-R remains the specified component when design requirements mandate the exact inductance tolerance of ±20% and the operating temperature ceiling of 85°C. This part is Active status and RoHS compliant.

Substitute Part: SRR4011-101YL The SRR4011-101YL (Bourns Inc.) is suitable as an equivalent when:

• The application permits inductance tolerance of ±30%
• The circuit operates within the extended temperature range of -40°C to 125°C
• DC resistance variation from 2.64 Ohm to 2.4 Ohm is acceptable
• Current and saturation ratings of 310 mA and 270 mA respectively meet circuit requirements

Both parts are Active status products with full RoHS and environmental compliance. The SRR4011-101YL offers extended temperature capability and lower DC resistance, which may provide thermal and efficiency benefits in certain applications.

Frequently Asked Questions (FAQ)

Q: Can the SRR4011-101YL replace the SD12-101-R in all applications?

A: Substitution is valid when the application tolerates the wider inductance tolerance (±30% vs. ±20%) and the extended operating temperature range of the Bourns part does not conflict with circuit design. The lower DC resistance of the SRR4011-101YL (2.4 Ohm max vs. 2.64 Ohm) is generally beneficial for power dissipation.

Q: What are the physical dimension differences between these parts?

A: The SD12-101-R measures 0.205" L x 0.205" W x 0.047" H (5.20mm x 5.20mm x 1.20mm). The SRR4011-101YL measures 0.189" L x 0.189" W x 0.051" H (4.80mm x 4.80mm x 1.30mm). Both are nonstandard packages. Verify PCB footprint compatibility before substitution.

Q: Are both parts available in Tape & Reel packaging?

A: Yes, both the SD12-101-R and SRR4011-101YL are supplied in Tape & Reel (TR) packaging suitable for automated assembly.

Q: What is the saturation current difference and does it matter?

A: The SD12-101-R has Isat of 273 mA while the SRR4011-101YL has Isat of 270 mA. This 3 mA difference is negligible for most applications. Both parts maintain stable inductance characteristics within their rated current ranges.

Q: Do both parts have identical moisture sensitivity ratings?

A: Yes, both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.