Bourns 8111 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8111 is a 12 mH, 2-line common mode choke designed for through-hole mounting with a maximum current rating of 4A and DC resistance of 110 mOhm. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement planning. The 8111 series operates across a temperature range of -55°C to 105°C and is housed in a vertical, 4-pin package configuration.

Substiute Parts

8111

Bourns Inc.In Stock: 11528111 Datasheet

Current PartRFQ

8111-RC

Bourns Inc.In Stock: 10078111-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Bourns 8111 is based on electrical and mechanical parameter equivalence. The primary substitute, model 8111-RC, maintains identical specifications across all critical parameters: 12 mH inductance at 1 kHz, 2-line configuration, 4A maximum current rating, and 110 mOhm maximum DC resistance. Physical dimensions, mounting type, and thermal operating range are preserved. The key distinction is product status: the 8111 is obsolete, while the 8111-RC is active production. Packaging differs between the two models (the original uses standard packaging while the substitute is supplied in bulk), but this does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 8111-RC is the direct substitute for the obsolete Bourns 8111. All electrical parameters, mechanical dimensions, and thermal specifications are identical. The 8111-RC is in active production status, ensuring long-term availability and supply chain continuity. The 8111-RC achieves ROHS3 compliance, whereas the original 8111 is non-compliant. Both components maintain REACH Unaffected status and carry the same ECCN classification (EAR99). For new designs or ongoing production requiring this common mode choke specification, the 8111-RC is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 8111-RC be used as a direct replacement for the 8111? A: Yes. The 8111-RC maintains identical electrical specifications (12 mH inductance, 4A current rating, 110 mOhm DCR), mechanical dimensions, and mounting configuration. Pin-to-pin compatibility is preserved.

Q: What is the difference between the 8111 and 8111-RC? A: The primary differences are product status and compliance. The 8111 is obsolete and RoHS non-compliant. The 8111-RC is in active production and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these models? A: Yes. The 8111 uses standard packaging, while the 8111-RC is supplied in bulk packaging. This affects procurement and handling but does not impact electrical or mechanical performance.

Q: Does the RoHS3 compliance of the 8111-RC affect circuit performance? A: No. RoHS3 compliance relates to material composition and environmental standards, not electrical performance. The 8111-RC delivers identical electrical characteristics to the 8111.

Q: What is the current inventory status? A: The 8111 has 1,123 pieces in stock (new original). The 8111-RC has 994 pieces in stock (new original). Both are available for immediate procurement.

Q: Are both components suitable for the same operating temperature range? A: Yes. Both the 8111 and 8111-RC operate across -55°C to 105°C.