CURN103-HF Equivalent & Substitute Parts Reference

Part Overview

The CURN103-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 600 V DC reverse voltage and 1 A average rectified current in a 1206/SOD-123 surface mount package. The device is classified as Active product status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, enabling design flexibility and supply chain optimization for this rectifier diode category.

Substiute Parts

CURN103-HF

Comchip TechnologyIn Stock: 1663CURN103-HF Datasheet

Current PartRFQ

ACEFN103-HF

Comchip TechnologyIn Stock: 27409ACEFN103-HF Datasheet

Parametric EquivalentRFQ

ACURN103-HF

Comchip TechnologyIn Stock: 15080ACURN103-HF Datasheet

Parametric EquivalentRFQ

CD214A-FS1J

Bourns Inc.In Stock: 13151CD214A-FS1J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CURN103-HF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 600 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1.7 V @ 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• Package / Case: 2-SMD, No Lead
• Operating Temperature - Junction: -65°C to 175°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Reverse Recovery Time (trr): Values ≤ 50 ns are acceptable (faster recovery is permissible)
• Capacitance @ Vr, F: Values ≤ 10 pF are acceptable (lower capacitance is permissible)
• Current - Reverse Leakage @ Vr: When specified, values ≤ 5 µA @ 600 V are acceptable
• Supplier Device Package designation: Minor nomenclature differences (1206 vs. 1206/SOD-123) do not affect substitution eligibility

All three identified substitute parts meet these criteria and are classified as parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts satisfy the electrical and mechanical equivalence requirements for the CURN103-HF. Selection among these options is based on product availability, compliance requirements, and supply chain considerations:

ACEFN103-HF (Comchip Technology): Automotive-grade device with AEC-Q101 qualification. Reverse recovery time of 35 ns provides improved switching performance compared to the main part. REACH Unaffected status. Inventory: 27,349 pcs.

ACURN103-HF (Comchip Technology): Automotive-grade device with AEC-Q101 qualification. Reverse recovery time matches the main part at 50 ns. REACH Unaffected status. Inventory: 15,068 pcs.

CD214A-FS1J (Bourns Inc.): Standard-grade device with 35 ns reverse recovery time and 8 pF capacitance. REACH Affected status requires compliance verification for applications subject to REACH regulations. Inventory: 13,056 pcs.

All parts maintain RoHS3 compliance and MSL 1 rating. Selection should account for automotive qualification requirements, REACH compliance obligations, and inventory availability for the specific application.

Frequently Asked Questions (FAQ)

Q: Can ACEFN103-HF replace CURN103-HF in all applications?

A: Yes. ACEFN103-HF meets all mandatory electrical and mechanical equivalence criteria. The 35 ns reverse recovery time is faster than the main part's 50 ns specification, which is permissible. Automotive-grade qualification and AEC-Q101 certification provide additional quality assurance for demanding applications.

Q: What is the difference between ACURN103-HF and ACEFN103-HF?

A: Both are Comchip Technology automotive-grade devices with AEC-Q101 qualification. ACEFN103-HF has a reverse recovery time of 35 ns, while ACURN103-HF matches the main part at 50 ns. Both are electrically equivalent for the CURN103-HF application.

Q: Is CD214A-FS1J suitable for REACH-regulated applications?

A: CD214A-FS1J is marked as REACH Affected. Applications subject to REACH regulations must verify compliance status with the manufacturer or supplier before selection. ACEFN103-HF and ACURN103-HF are both REACH Unaffected and may be preferred for REACH-compliant designs.

Q: Does the 8 pF capacitance of CD214A-FS1J affect compatibility?

A: No. The 8 pF capacitance is lower than the main part's 10 pF specification, which is within acceptable variation. Lower capacitance does not compromise substitution eligibility and may provide improved high-frequency performance in certain circuit topologies.

Q: Are all substitute parts available in the same package?

A: Yes. All parts use 2-SMD, No Lead surface mount packaging. CURN103-HF and ACURN103-HF are designated as 1206/SOD-123, while ACEFN103-HF is designated as 1206, and CD214A-FS1J as 2-SMD. These designations refer to the same physical package form factor and are mechanically interchangeable.

Q: What is the significance of the 50 ns vs. 35 ns reverse recovery time difference?

A: Reverse recovery time affects switching speed and switching losses. The 35 ns specification of ACEFN103-HF and CD214A-FS1J represents faster recovery than the main part's 50 ns. Both values satisfy the Fast Recovery classification (≤ 500ns, > 200mA). Faster recovery may reduce switching losses in high-frequency applications but does not affect DC circuit performance.

Q: Can I mix CURN103-HF and substitute parts in the same design?

A: Yes. All parts are parametric equivalents with identical electrical ratings and mechanical compatibility. Mixed sourcing is permissible for supply chain flexibility, provided that circuit design does not depend on specific reverse recovery time characteristics below 35 ns.