Bourns 1120-330K Equivalent & Substitute Parts

Part Overview

The Bourns 1120-330K is a 33 µH unshielded drum core wirewound inductor rated for 5.5 A with a maximum DC resistance of 29 mOhm. This through-hole radial component operates across a temperature range of -55°C to 105°C and is mounted vertically in a cylinder package measuring 0.810" diameter by 0.840" height. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

1120-330K

Bourns Inc.In Stock: 8251120-330K Datasheet

Current PartRFQ

DC780-333K

API Delevan Inc.In Stock: 1111DC780-333K Datasheet

SimilarRFQ

IHB2BV330K

Vishay DaleIn Stock: 1164IHB2BV330K Datasheet

SimilarRFQ

IHB2EB330K

Vishay DaleIn Stock: 1026IHB2EB330K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 1120-330K is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance value: 33 µH at 1 kHz test frequency
• Tolerance: ±10%
• Current rating: minimum 5.5 A
• DC resistance: maximum 29 mOhm
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting: Through-hole radial vertical cylinder package
• Operating temperature range: minimum -55°C to 105°C coverage

The three identified substitute parts meet these criteria and are therefore electrically and mechanically interchangeable with the main part in applications requiring these specifications.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan DC780-333K is the primary recommended substitute. It maintains all critical electrical parameters identical to the Bourns 1120-330K while offering an extended operating temperature range to 125°C and active product status, ensuring continued availability and supply chain stability. The DC780-333K is available in bulk packaging with 1030 units in stock.

The Vishay Dale IHB2BV330K and IHB2EB330K are secondary alternatives. Both provide marginally higher current ratings of 5.6 A compared to the 5.5 A specification of the main part, with identical DC resistance and package configuration. These parts maintain unshielded ferrite core construction and through-hole radial mounting. Inventory availability is 1070 and 943 units respectively.

All substitute parts are RoHS non-compliant and REACH unaffected, consistent with the main part's compliance profile. Selection should prioritize the DC780-333K for new designs requiring active product status and extended temperature performance.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan DC780-333K directly replace the Bourns 1120-330K in existing designs?

A: Yes. The DC780-333K meets all electrical specifications (33 µH inductance, 5.5 A current rating, 29 mOhm maximum DC resistance) and maintains identical package geometry (radial vertical cylinder through-hole mounting). The extended temperature range to 125°C provides additional operational margin.

Q: What is the significance of the current rating difference between the main part (5.5 A) and the Vishay Dale alternatives (5.6 A)?

A: The higher current rating of the Vishay Dale parts indicates greater saturation margin. Both IHB2BV330K and IHB2EB330K are suitable for applications designed for 5.5 A operation, as they exceed the minimum current requirement.

Q: Are there physical dimension differences between substitute parts?

A: The API Delevan DC780-333K has slightly different dimensions (0.772" diameter, 0.831" height) compared to the Bourns 1120-330K (0.810" diameter, 0.840" height). Verify PCB layout clearances before substitution. The Vishay Dale parts maintain the same radial vertical cylinder package classification.

Q: Why is product status relevant for component selection?

A: The Bourns 1120-330K is obsolete, meaning future availability cannot be guaranteed. The API Delevan DC780-333K carries active status, ensuring continued manufacturing and supply chain access for production and field service applications.

Q: Do all substitute parts share the same RoHS compliance status?

A: The API Delevan DC780-333K is RoHS non-compliant, matching the main part. Vishay Dale compliance information is not provided in the available data. Verify RoHS requirements with your procurement specifications before final selection.