74457133 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 74457133 is a 33 µH unshielded drum core wirewound inductor rated for 3.4 A continuous current with a maximum DC resistance of 70 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is specified for 100 kHz inductance testing. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring fixed inductance in power conversion, filtering, and signal conditioning circuits. Equivalent parts are identified when electrical characteristics and mechanical compatibility align within the specified tolerance and performance parameters.

Substiute Parts

74457133

Würth ElektronikIn Stock: 143374457133 Datasheet

Current PartRFQ

SDR2207-330YL

Bourns Inc.In Stock: 1452SDR2207-330YL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74457133 is determined by strict equivalence across the following electrical and mechanical parameters:

• Inductance Value: 33 µH at 100 kHz test frequency
• Tolerance: ±15%
• Current Rating: 3.4 A minimum continuous current capability
• Saturation Current: 5.5 A minimum
• DC Resistance: Maximum 70 mOhm
• Core Type: Ferrite drum core, unshielded wirewound construction
• Temperature Range: -40°C to 125°C operation
• Package Footprint: 22.00 mm × 15.00 mm surface mount with 7.80 mm maximum height
• Mounting: Surface mount, tape and reel packaging

The Bourns SDR2207-330YL meets all specified electrical parameters and maintains identical mechanical compatibility with the 74457133.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 74457133 and Bourns SDR2207-330YL are Active status components with full ROHS3 compliance and REACH unaffected certification. The Bourns SDR2207-330YL offers a lower DC resistance specification (58.4 mOhm versus 70 mOhm maximum), which provides improved thermal performance and reduced power dissipation in the same package footprint. Both parts maintain identical electrical ratings for inductance, current, saturation, and temperature operation. Selection between these parts depends on design priorities: the 74457133 is the original specification, while the SDR2207-330YL provides enhanced DC resistance characteristics within the same mechanical and electrical envelope.

Frequently Asked Questions (FAQ)

Q: Can the Bourns SDR2207-330YL directly replace the Würth 74457133 in existing designs?

A: Yes. Both parts share identical inductance (33 µH), current rating (3.4 A), saturation current (5.5 A), operating temperature range (-40°C to 125°C), and package footprint (22.00 mm × 15.00 mm × 7.80 mm). The Bourns part has lower DC resistance, which is a performance advantage.

Q: What is the significance of the DC resistance difference between these parts?

A: The Bourns SDR2207-330YL specifies 58.4 mOhm maximum DC resistance compared to 70 mOhm for the 74457133. Lower DC resistance reduces I²R losses and heat generation during operation, improving efficiency in power conversion applications.

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

A: Yes. Both the 74457133 and SDR2207-330YL are supplied in Tape & Reel (TR) packaging for automated assembly.

Q: Do these parts have the same moisture sensitivity rating?

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

Q: Are there compliance differences between these substitutes?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical environmental certifications.

Q: What is the tolerance specification for inductance on both parts?

A: Both parts are specified with ±15% inductance tolerance at 100 kHz test frequency.