SDR2207-330K Equivalent & Substitute Parts

Part Overview

The SDR2207-330K is a 33 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 3.4 A continuous current with a maximum DC resistance of 58.4 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is designed for applications requiring fixed inductance in compact nonstandard packaging.

The SDR2207-330K is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor.

Substiute Parts

SDR2207-330K

Bourns Inc.In Stock: 1199SDR2207-330K Datasheet

Current PartRFQ

SDR2207-330KL

Bourns Inc.In Stock: 916SDR2207-330KL Datasheet

DirectRFQ

74457133

Würth ElektronikIn Stock: 143374457133 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDR2207-330K are identified based on the following critical parameters that determine functional equivalence:

• Inductance Value: 33 µH (exact match required)
• Current Rating: 3.4 A minimum continuous current capability
• Current - Saturation (Isat): 5.5 A minimum
• Core Material: Ferrite drum core, unshielded construction
• Mounting Type: Surface mount
• Physical Dimensions: 22.00 mm L x 15.00 mm W x 7.80 mm H (max seated height)
• Operating Temperature Range: -40°C ~ 125°C minimum
• Inductance Frequency - Test: 100 kHz

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent: SDR2207-330KL (Bourns Inc.) — identical electrical specifications and physical form factor, differing only in packaging configuration.

Similar Cross-Manufacturer Substitute: 74457133 (Würth Elektronik) — meets all critical electrical and mechanical parameters with minor tolerance and DC resistance variations within acceptable engineering margins.

Parameter Comparison

Engineering Selection Recommendations

SDR2207-330KL is the primary substitute for the obsolete SDR2207-330K. Both components are manufactured by Bourns Inc. and share identical electrical specifications, physical dimensions, and operating characteristics. The SDR2207-330KL maintains active product status and is available in Tape & Reel packaging, ensuring supply chain continuity. This part is ROHS3 compliant and carries MSL 1 rating, matching the original component's environmental compliance profile.

74457133 (Würth Elektronik) serves as a cross-manufacturer alternative when SDR2207-330KL availability is constrained. This part meets all critical electrical parameters: 33 µH inductance, 3.4 A current rating, 5.5 A saturation current, and identical physical form factor. The DC resistance specification of 70 mOhm maximum represents a 1.6 mOhm increase over the original 58.4 mOhm specification, which remains within acceptable engineering tolerances for most applications. The inductance tolerance of ±15% is broader than the original ±10%, requiring circuit-level evaluation in precision-dependent applications. The 74457133 is active in production, ROHS3 compliant, and carries MSL 1 rating.

Both substitute parts are suitable for direct replacement in applications where the SDR2207-330K was originally specified, provided that circuit design parameters accommodate the noted tolerance and resistance variations.

Frequently Asked Questions (FAQ)

Q: Can SDR2207-330KL be used as a direct replacement for SDR2207-330K?

A: Yes. The SDR2207-330KL is electrically and mechanically identical to the SDR2207-330K. Both components feature 33 µH inductance, ±10% tolerance, 3.4 A current rating, 58.4 mOhm maximum DC resistance, and identical physical dimensions. The primary difference is product status: SDR2207-330KL is active, while SDR2207-330K is obsolete.

Q: What are the differences between SDR2207-330KL and 74457133?

A: Both parts share the same inductance value (33 µH), current rating (3.4 A), saturation current (5.5 A), and physical dimensions. The 74457133 has a higher maximum DC resistance (70 mOhm vs. 58.4 mOhm) and broader inductance tolerance (±15% vs. ±10%). The 74457133 is manufactured by Würth Elektronik rather than Bourns Inc.

Q: Is the higher DC resistance of 74457133 acceptable?

A: The 74457133 DC resistance of 70 mOhm maximum is 1.6 mOhm higher than the SDR2207-330K specification of 58.4 mOhm. This difference represents approximately 2.7% additional resistance. Acceptability depends on circuit design requirements. Applications sensitive to inductor losses or thermal dissipation should evaluate this parameter against design specifications.

Q: Are both substitute parts RoHS and REACH compliant?

A: Yes. Both SDR2207-330KL and 74457133 are ROHS3 compliant and REACH unaffected. Both carry Moisture Sensitivity Level 1 (unlimited), matching the original SDR2207-330K environmental compliance profile.

Q: What is the difference in packaging between SDR2207-330K and SDR2207-330KL?

A: The SDR2207-330K packaging is not specified in the provided data. The SDR2207-330KL is supplied in Tape & Reel (TR) packaging, which is standard for high-volume surface mount assembly operations.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all three parts share identical physical dimensions (22.00 mm L x 15.00 mm W x 7.80 mm H maximum seated height) and surface mount mounting type. PCB footprints and assembly processes require no modification when substituting between these parts.