ACURN104-HF Equivalent & Substitute Parts

Part Overview

The ACURN104-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 800 V DC reverse voltage and 1 A average rectified current in a 1206/SOD-123 surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while meeting applicable compliance standards.

Substiute Parts

ACURN104-HF

Comchip TechnologyIn Stock: 895ACURN104-HF Datasheet

Current PartRFQ

CD214B-FS2K

Bourns Inc.In Stock: 10555CD214B-FS2K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACURN104-HF is determined by the following critical electrical and mechanical parameters:

Voltage Rating: The substitute part must maintain a DC reverse voltage rating of 800 V or higher to ensure safe operation in the same circuit topology.

Current Rating: The substitute part must support the average rectified current requirement. Parts with equal or higher current ratings are acceptable.

Speed Classification: The substitute part must maintain fast recovery characteristics (≤ 500ns, > 200mA) to preserve switching performance and minimize reverse recovery losses.

Reverse Recovery Time: The substitute part must meet or exceed the reverse recovery time specification to maintain circuit timing and efficiency characteristics.

Mounting and Package: The substitute part must be surface mount technology with compatible footprint dimensions for PCB integration.

Compliance Standards: The substitute part must maintain RoHS3 compliance and appropriate regulatory certifications for the intended application.

Parameter Comparison

Engineering Selection Recommendations

The CD214B-FS2K from Bourns Inc. is a qualified substitute for the obsolete ACURN104-HF. Selection is based on the following engineering criteria:

Voltage and Current Compatibility: Both parts maintain 800 V DC reverse voltage rating. The CD214B-FS2K is rated for 2 A average rectified current, exceeding the 1 A requirement of the ACURN104-HF, providing design margin for current handling.

Speed and Recovery Characteristics: Both parts meet fast recovery specifications (≤ 500ns, > 200mA). The CD214B-FS2K exhibits superior reverse recovery time (35 ns versus 75 ns), resulting in reduced switching losses and improved circuit efficiency.

Thermal Performance: Both parts operate across the identical junction temperature range (-65 to 175 °C), ensuring thermal compatibility in the target application.

Regulatory Compliance: Both parts are ROHS3 compliant and carry equivalent regulatory certifications (EAR99, HTSUS 8541.10.0080), meeting procurement and environmental requirements.

Product Availability: The CD214B-FS2K maintains active manufacturing status with substantial inventory availability (10,488 pcs), ensuring long-term supply continuity compared to the obsolete ACURN104-HF.

Package Compatibility: Both parts utilize identical 2-SMD, no-lead surface mount packaging, permitting direct PCB footprint compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CD214B-FS2K directly replace the ACURN104-HF without circuit modifications?

A: Yes. Both parts maintain identical voltage ratings (800 V), equivalent speed classifications, and identical package geometry (2-SMD, no lead). The higher current rating (2 A versus 1 A) and faster recovery time (35 ns versus 75 ns) of the substitute provide enhanced performance margins without requiring circuit redesign.

Q: What is the significance of the higher current rating in the CD214B-FS2K?

A: The CD214B-FS2K is rated for 2 A average rectified current, compared to 1 A for the ACURN104-HF. This higher rating provides design margin and thermal headroom in applications operating at or near the original 1 A specification, reducing junction temperature rise and extending component life.

Q: How does the faster reverse recovery time affect circuit performance?

A: The CD214B-FS2K exhibits 35 ns reverse recovery time compared to 75 ns for the ACURN104-HF. Faster recovery reduces switching losses, improves efficiency in high-frequency applications, and minimizes electromagnetic interference (EMI) generation during diode commutation.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant and carry identical regulatory classifications (EAR99, HTSUS 8541.10.0080). The CD214B-FS2K is REACH Affected, while the ACURN104-HF is REACH Unaffected; however, both meet applicable environmental and trade compliance requirements for general industrial applications.

Q: What is the moisture sensitivity level for both parts?

A: Both the ACURN104-HF and CD214B-FS2K carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage, handling, or assembly processes.

Q: Are there any forward voltage differences that affect circuit design?

A: Forward voltage specifications are measured at different operating points: ACURN104-HF at 1.7 V @ 1 A versus CD214B-FS2K at 2.2 V @ 2 A. At the original 1 A operating point, the CD214B-FS2K forward voltage will be lower than the specified 2.2 V maximum, resulting in reduced power dissipation compared to the original part.