HCTC-12-4 Equivalent & Substitute Parts

Part Overview

The HCTC-12-4 is a common mode choke (CMC) manufactured by Signal Transformer, designed for power line filtering applications. This through-hole component provides 12 mH inductance at 1 kHz with a maximum current rating of 4A and 110 mOhm DC resistance. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts may be required due to inventory constraints, packaging preferences, or supply chain considerations while maintaining equivalent electrical and mechanical performance.

Substiute Parts

HCTC-12-4

Signal TransformerIn Stock: 1065HCTC-12-4 Datasheet

Current PartRFQ

8111-RC

Bourns Inc.In Stock: 10078111-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The HCTC-12-4 substitute relationship is established based on the following critical parameters that define functional equivalence:

• Inductance value: 12 mH @ 1 kHz
• Current rating: 4A maximum
• DC resistance: 110 mOhm maximum
• Number of lines: 2-line configuration
• Mounting type: Through hole
• Operating temperature range: -55°C ~ 105°C
• Package configuration: Vertical, 4 PC pin
• Compliance: ROHS3 compliant

The Bourns 8111-RC meets all these electrical and mechanical requirements, making it a direct functional substitute for the HCTC-12-4 in power line filtering applications.

Parameter Comparison

Engineering Selection Recommendations

Both the HCTC-12-4 and 8111-RC are active production components with identical electrical specifications and compliance certifications. Selection between these parts should be based on:

• Packaging format: HCTC-12-4 is supplied in tray packaging; 8111-RC is supplied in bulk packaging
• Physical footprint: The 8111-RC has a slightly wider dimension (0.800" vs 0.600"), which may affect PCB layout in space-constrained applications
• Inventory availability: Both parts maintain substantial stock levels (958 pcs and 994 pcs respectively)
• Regulatory compliance: Both parts meet ROHS3 and REACH requirements with EAR99 export classification

Frequently Asked Questions (FAQ)

Q: Can the 8111-RC directly replace the HCTC-12-4 in my circuit?

A: Yes. Both components have identical electrical specifications: 12 mH inductance at 1 kHz, 4A current rating, and 110 mOhm DC resistance. They share the same operating temperature range, mounting type, and compliance certifications.

Q: What is the difference in physical dimensions between these parts?

A: The length and height are identical (1.350" L x 1.450" H). The width differs: HCTC-12-4 is 0.600" wide, while 8111-RC is 0.800" wide. Verify PCB layout clearances before substitution.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes.

Q: What packaging differences exist between these parts?

A: HCTC-12-4 is supplied in tray packaging; 8111-RC is supplied in bulk packaging. This affects handling and storage but does not impact electrical performance.

Q: Do both parts have the same pin configuration?

A: Yes. Both use a vertical, 4 PC pin package configuration suitable for through-hole PCB assembly.