Equivalent & Substitute Parts for 1120-561K

Part Overview

The Bourns 1120-561K is a 560 µH unshielded drum core wirewound inductor rated for 1.6 A with a maximum DC resistance of 388 mOhm. 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 part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

1120-561K

Bourns Inc.In Stock: 11591120-561K Datasheet

Current PartRFQ

DC780-564K

API Delevan Inc.In Stock: 1161DC780-564K Datasheet

SimilarRFQ

IHB2BV561K

Vishay DaleIn Stock: 751IHB2BV561K Datasheet

SimilarRFQ

IHB2EB561K

Vishay DaleIn Stock: 836IHB2EB561K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1120-561K is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance Value: 560 µH (exact match required)
• Inductance Tolerance: ±10% (exact match required)
• Current Rating: Minimum 1.6 A (equal or higher acceptable)
• DC Resistance: 388 mOhm maximum (equal or lower acceptable)
• Core Material: Ferrite (exact match required)
• Shielding Configuration: Unshielded (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Radial, Vertical Cylinder (exact match required)
• Operating Temperature Range: Minimum -55°C to 105°C (equal or wider acceptable)

All identified substitute parts meet these criteria and are therefore electrically and mechanically compatible with the original 1120-561K specification.

Parameter Comparison

Engineering Selection Recommendations

DC780-564K (API Delevan Inc.) is the primary substitute for the 1120-561K. This part maintains identical electrical specifications (560 µH, ±10%, 1.6 A, 388 mOhm) and mechanical form factor while offering an extended operating temperature range (-55°C to 125°C). The DC780-564K is currently in active production status, ensuring long-term availability and supply chain stability. Both parts share RoHS non-compliant status.

IHB2BV561K and IHB2EB561K (Vishay Dale) are secondary substitutes. These components meet all core electrical and mechanical requirements with identical inductance, tolerance, DC resistance, and package configuration. However, both parts carry a reduced current rating of 1.5 A compared to the original 1.6 A specification. These substitutes are suitable only for applications where the circuit design accommodates the lower current rating without exceeding component thermal or saturation limits.

Selection between substitute options should prioritize the DC780-564K for direct replacement in applications requiring the full 1.6 A current rating. The Vishay Dale alternatives are acceptable only when circuit analysis confirms that 1.5 A operation is sufficient for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the DC780-564K directly replace the 1120-561K without circuit modification?

A: Yes. The DC780-564K maintains identical inductance (560 µH), tolerance (±10%), current rating (1.6 A), and DC resistance (388 mOhm) specifications. The extended operating temperature range (-55°C to 125°C versus -55°C to 105°C) provides additional thermal margin. No circuit modification is required.

Q: Why do the Vishay Dale parts (IHB2BV561K and IHB2EB561K) have a lower current rating?

A: The Vishay Dale inductors are rated for 1.5 A maximum current, compared to 1.6 A for the original and primary substitute. This 0.1 A reduction may impact thermal performance and saturation characteristics in high-current applications. Substitution with these parts requires verification that circuit operating current does not exceed 1.5 A.

Q: Are there physical size differences between the main part and substitutes?

A: Minor dimensional variations exist. The 1120-561K measures 0.810" diameter by 0.840" height. The DC780-564K measures 0.772" diameter by 0.831" height. These differences are within typical PCB layout tolerances for radial through-hole components but should be verified against specific board design constraints.

Q: What is the significance of the obsolete status for the 1120-561K?

A: Obsolete status indicates that Bourns has discontinued production of this part. The DC780-564K, classified as active, is the recommended substitute to ensure continued availability and support for new procurement requirements.

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

A: The 1120-561K and DC780-564K are both RoHS non-compliant. Compliance status for the Vishay Dale parts is not specified in available documentation. Verify RoHS requirements against your specific application and regulatory obligations before final part selection.