Bourns 1120-122K Equivalent & Substitute Parts

Part Overview

The Bourns 1120-122K is a 1.2 mH unshielded drum core wirewound inductor rated for 800 mA with a maximum DC resistance of 1.14 Ohm. This through-hole radial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 1120-122K carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications.

Substiute Parts

1120-122K

Bourns Inc.In Stock: 10411120-122K Datasheet

Current PartRFQ

DC780-125K

API Delevan Inc.In Stock: 1062DC780-125K Datasheet

SimilarRFQ

IHB2BV122K

Vishay DaleIn Stock: 1003IHB2BV122K Datasheet

SimilarRFQ

IHB2EB122K

Vishay DaleIn Stock: 859IHB2EB122K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-122K are qualified based on the following critical parameters:

• Inductance value: 1.2 mH (exact match required)
• Inductance tolerance: ±10% (exact match required)
• DC resistance: 1.14 Ohm maximum (exact match required)
• Core material: Ferrite (exact match required)
• Shielding: Unshielded (exact match required)
• Mounting type: Through hole (exact match required)
• Package configuration: Radial, vertical cylinder (exact match required)
• Current rating: Minimum 800 mA (equal or greater acceptable)
• Operating temperature range: Minimum -55°C to 105°C (equal or wider range acceptable)

Three substitute parts meet these criteria: DC780-125K (API Delevan Inc.), IHB2BV122K (Vishay Dale), and IHB2EB122K (Vishay Dale).

Parameter Comparison

Engineering Selection Recommendations

The DC780-125K from API Delevan Inc. is the primary substitute for the obsolete 1120-122K. This part maintains identical electrical specifications (1.2 mH, ±10% tolerance, 800 mA, 1.14 Ohm DCR) and physical form factor while offering an extended operating temperature range (-55°C to 125°C). The DC780-125K carries active product status, ensuring ongoing availability and supply chain continuity. Both parts share non-compliant RoHS status.

The IHB2BV122K and IHB2EB122K from Vishay Dale provide alternative substitutes with identical inductance, tolerance, and DC resistance specifications. These parts feature a higher current rating of 900 mA, providing additional design margin. However, complete operating temperature range and RoHS compliance data are not provided for these alternatives.

For new designs or production requiring the highest component availability assurance, the DC780-125K is the recommended primary substitute.

Frequently Asked Questions (FAQ)

Q: Can the DC780-125K directly replace the 1120-122K in existing designs?

A: Yes. The DC780-125K matches all critical electrical parameters (inductance, tolerance, current rating, DC resistance) and physical form factor (radial, vertical cylinder, through-hole mounting). The extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) provides additional thermal margin.

Q: What is the difference between the Bourns 1120-122K and Vishay Dale IHB2BV122K?

A: Both parts share identical inductance (1.2 mH), tolerance (±10%), and DC resistance (1.14 Ohm). The IHB2BV122K provides a higher current rating (900 mA versus 800 mA). Complete operating temperature specifications for the Vishay part are not provided in available documentation.

Q: Are there physical dimension differences between these substitutes?

A: The DC780-125K has slightly different dimensions (0.772" diameter, 0.831" height) compared to the 1120-122K (0.810" diameter, 0.840" height). Both maintain radial, vertical cylinder form factors suitable for through-hole mounting. Physical clearance verification is recommended for space-constrained applications.

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

A: The 1120-122K and DC780-125K are both RoHS non-compliant. RoHS compliance status for the Vishay Dale alternatives (IHB2BV122K, IHB2EB122K) is not specified in available data.

Q: Which substitute offers the best long-term availability?

A: The DC780-125K carries active product status from API Delevan Inc., indicating ongoing production and supply chain support. The 1120-122K is obsolete. Vishay Dale product status for the IHB alternatives is not specified.