Bourns 1120-680K 68µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 1120-680K is a 68µH unshielded drum core wirewound inductor rated for 4.8A continuous current with 53mOhm maximum DC resistance. This through-hole radial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The 1120-680K has reached obsolete product status. Equivalent and substitute parts are available from active product lines that maintain the same electrical and mechanical specifications, ensuring design continuity for existing applications.

Substiute Parts

1120-680K

Bourns Inc.In Stock: 7431120-680K Datasheet

Current PartRFQ

1120-680K-RC

Bourns Inc.In Stock: 14511120-680K-RC Datasheet

DirectRFQ

DC780-683K

API Delevan Inc.In Stock: 847DC780-683K Datasheet

SimilarRFQ

IHB2BV680K

Vishay DaleIn Stock: 742IHB2BV680K Datasheet

SimilarRFQ

IHB2EB680K

Vishay DaleIn Stock: 1120IHB2EB680K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1120-680K are classified based on electrical and mechanical parameter alignment:

Direct Equivalent (Same Manufacturer): The 1120-680K-RC maintains identical electrical specifications (68µH ±10%, 4.8A, 53mOhm DCR) and mechanical form factor. This part differs only in packaging (Bulk vs. standard) and product status (Active vs. Obsolete), making it a direct replacement with improved RoHS3 compliance.

Cross-Manufacturer Equivalents: The DC780-683K (API Delevan) and IHB2EB680K/IHB2BV680K (Vishay Dale) series maintain the core electrical parameters: 68µH inductance, ±10% tolerance, 53mOhm maximum DC resistance, unshielded ferrite drum core construction, and through-hole radial mounting. These parts are functionally interchangeable within the specified parameter tolerances.

Key Substitution Parameters:

• Inductance value and tolerance
• Current rating capability
• DC resistance specification
• Core material and shielding configuration
• Physical form factor (radial, vertical cylinder)
• Through-hole mounting compatibility

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: The 1120-680K-RC is the preferred substitute. It is manufactured by Bourns under the same product series, maintains all electrical and mechanical specifications of the original part, and carries Active product status with RoHS3 compliance. This selection eliminates design validation concerns and ensures supply chain continuity.

Secondary Recommendations: The DC780-683K (API Delevan) and Vishay Dale IHB series (IHB2EB680K, IHB2BV680K) are functionally equivalent alternatives. Both maintain the 68µH inductance, ±10% tolerance, 53mOhm DCR, and through-hole radial form factor. The DC780-683K extends the operating temperature range to 125°C, providing additional thermal margin in high-temperature applications. The Vishay Dale parts carry lower current ratings (4.1A vs. 4.8A), requiring verification that application current demands do not exceed this limit.

Compliance Considerations: For applications requiring RoHS compliance, the 1120-680K-RC is the only substitute with documented RoHS3 certification. The original 1120-680K and DC780-683K are non-compliant and should be avoided in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 1120-680K-RC be used as a direct drop-in replacement for the obsolete 1120-680K?

A: Yes. The 1120-680K-RC maintains identical electrical specifications (68µH ±10%, 4.8A, 53mOhm DCR) and mechanical form factor (radial, vertical cylinder, through-hole mounting). The only differences are packaging format (Bulk) and improved RoHS3 compliance status.

Q: What is the difference between the Bourns 1120-680K-RC and the API Delevan DC780-683K?

A: Both parts meet the core electrical requirements (68µH, 4.8A, 53mOhm DCR). The DC780-683K offers an extended operating temperature range (-55°C to 125°C vs. -55°C to 105°C). Physical dimensions differ slightly (0.772" diameter vs. 0.810" diameter). The 1120-680K-RC is RoHS3 compliant; the DC780-683K is not.

Q: Can the Vishay Dale IHB2EB680K or IHB2BV680K replace the 1120-680K?

A: These parts are electrically equivalent in inductance (68µH), tolerance (±10%), and DC resistance (53mOhm). However, they are rated for 4.1A continuous current, compared to the original 4.8A rating. Substitution is valid only if application current requirements do not exceed 4.1A.

Q: Are there physical size differences between substitute parts?

A: Yes. The DC780-683K has a slightly smaller diameter (0.772" vs. 0.810") and height (0.831" vs. 0.840"). Verify PCB footprint and component spacing before substitution. The 1120-680K-RC maintains identical dimensions to the original part.

Q: Which substitute part should be selected for new designs?

A: The 1120-680K-RC is recommended for new designs. It is the active product from the original manufacturer, carries RoHS3 compliance, and eliminates cross-manufacturer validation requirements. The DC780-683K and Vishay Dale parts are suitable alternatives if specific thermal or sourcing requirements necessitate cross-manufacturer selection.

Q: What compliance certifications apply to these substitute parts?

A: The 1120-680K-RC is RoHS3 compliant. The original 1120-680K and DC780-683K are RoHS non-compliant. All parts are REACH Unaffected and classified under ECCN EAR99 (with DC780-683K under HTSUS 8504.50.4000 vs. 8504.50.8000 for Bourns parts).