SD12-220-R Equivalent & Substitute Parts Reference

Part Overview

The SD12-220-R is a 22 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with controlled DC resistance and current handling capabilities. The part operates across the temperature range of -40°C to 85°C and maintains active product status with RoHS compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be achieved within specified parameter tolerances, enabling procurement flexibility and supply chain continuity.

Substiute Parts

SD12-220-R

Eaton - Electronics DivisionIn Stock: 42210SD12-220-R Datasheet

Current PartRFQ

SRR4011-220YL

Bourns Inc.In Stock: 2655SRR4011-220YL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SD12-220-R are identified based on strict alignment with the following critical parameters:

Inductance Value: The substitute must provide 22 µH inductance to maintain circuit functionality.

Current Rating: The substitute current rating must be sufficient to support the application's maximum current demand. The SD12-220-R specifies 628 mA; substitutes with lower ratings require circuit redesign verification.

DC Resistance: The substitute DCR must be comparable to minimize changes in power dissipation and thermal characteristics. Higher DCR values increase heat generation.

Saturation Current: The substitute Isat must prevent core saturation under peak operating conditions.

Shielding: The substitute must maintain shielded construction to preserve EMI performance.

Core Material: Ferrite core material ensures consistent inductance-frequency characteristics.

Mounting Type: Surface mount compatibility is required for PCB assembly processes.

Operating Temperature Range: The substitute must support the application's thermal environment.

Package Dimensions: Physical compatibility with PCB layout and assembly equipment is mandatory.

Regulatory Compliance: RoHS or equivalent environmental compliance status must be maintained.

The SRR4011-220YL from Bourns Inc. meets these substitution criteria within acceptable parameter variations.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - SD12-220-R (Eaton): The SD12-220-R maintains active product status with established supply availability (42,200 pcs in stock). RoHS compliance and EAR99 classification support standard procurement workflows. The specified current rating of 628 mA and DCR of 633.8 mOhm establish the baseline performance envelope for this application.

Substitute Selection - SRR4011-220YL (Bourns): The SRR4011-220YL qualifies as a functional substitute when the following conditions are met:

1. Application maximum current does not exceed 600 mA (28 mA margin below SD12-220-R rating)
2. PCB layout accommodates the smaller 4.80mm x 4.80mm footprint
3. Component clearance allows for the 1.30mm maximum seated height
4. The wider inductance tolerance of ±30% is acceptable for circuit design
5. Extended operating temperature range to 125°C provides additional thermal margin

The SRR4011-220YL exhibits lower DC resistance (580 mOhm max versus 633.8 mOhm), resulting in reduced power dissipation and improved thermal performance. ROHS3 compliance and identical ECCN/HTSUS classification ensure regulatory and trade compliance equivalence.

Substitution Constraints: The SRR4011-220YL is not suitable when:

• Application current demand exceeds 600 mA
• PCB layout requires the larger 5.20mm x 5.20mm footprint of the SD12-220-R
• Vertical clearance is limited below 1.30mm
• Tighter inductance tolerance than ±30% is required

Frequently Asked Questions (FAQ)

Q: Can the SRR4011-220YL replace the SD12-220-R in all applications?

A: No. The SRR4011-220YL has a lower current rating (600 mA versus 628 mA) and smaller physical dimensions. Substitution is valid only when application current remains below 600 mA and PCB layout accommodates the 4.80mm x 4.80mm footprint with 1.30mm maximum height.

Q: What is the significance of the different inductance tolerances (±20% versus ±30%)?

A: The SD12-220-R specifies ±20% tolerance, while the SRR4011-220YL specifies ±30%. For circuits with tight inductance requirements, the wider tolerance of the substitute may affect performance. Verify that circuit design accommodates the ±30% tolerance range before substitution.

Q: How does the lower DC resistance of the SRR4011-220YL affect performance?

A: The SRR4011-220YL exhibits 580 mOhm maximum DCR compared to 633.8 mOhm for the SD12-220-R. Lower DCR reduces resistive power dissipation (I²R losses), resulting in lower operating temperature and improved efficiency. This is a beneficial characteristic for most applications.

Q: Are there any regulatory or compliance differences between these parts?

A: Both parts are RoHS compliant (SD12-220-R is RoHS Compliant; SRR4011-220YL is ROHS3 Compliant). Both share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications. The SRR4011-220YL meets the current RoHS3 standard, which supersedes the original RoHS specification.

Q: What physical compatibility issues should be verified before substitution?

A: Three dimensional parameters require verification: (1) Footprint size: SRR4011-220YL is 4.80mm x 4.80mm versus SD12-220-R at 5.20mm x 5.20mm; (2) Height: SRR4011-220YL maximum seated height is 1.30mm versus 1.20mm for SD12-220-R; (3) Verify PCB layout and assembly equipment can accommodate the smaller footprint and slightly greater height.

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

A: The saturation current (Isat) is 574 mA for the SD12-220-R and 570 mA for the SRR4011-220YL. The 4 mA difference is negligible. Both parts exhibit comparable core saturation characteristics under peak current conditions.

Q: Can the SRR4011-220YL be used in applications requiring the full 628 mA current rating?

A: No. The SRR4011-220YL is rated for 600 mA maximum continuous current. Using it in applications requiring 628 mA would exceed its current rating and risk component failure or thermal damage. The SD12-220-R must be used when the full 628 mA rating is required.

Q: Why is the operating temperature range different?

A: The SD12-220-R operates from -40°C to 85°C, while the SRR4011-220YL operates from -40°C to 125°C. The extended upper temperature limit of the substitute provides additional thermal margin. If the application operates near 85°C, the SRR4011-220YL offers improved reliability headroom.

Q: Are both parts available in the same packaging format?

A: Yes. Both the SD12-220-R and SRR4011-220YL are supplied in Tape & Reel (TR) packaging suitable for automated PCB assembly. Both have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.