CFRM102-HF Equivalent & Substitute Parts

Part Overview

The CFRM102-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100 V DC reverse voltage and 1 A average rectified current in a Surface Mount Mini SMA/SOD-123 package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The fast recovery characteristic (≤500 ns) and compact form factor make this diode suitable for low-voltage rectification applications requiring miniaturized packaging.

Substiute Parts

CFRM102-HF

Comchip TechnologyIn Stock: 1147CFRM102-HF Datasheet

Current PartRFQ

CFRM104-HF

Comchip TechnologyIn Stock: 1797CFRM104-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CFRM102-HF is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

• Current rating: 1 A average rectified current (Io)
• Package type: SOD-123T (Surface Mount Mini SMA/SOD-123)
• Mounting technology: Surface Mount
• Forward voltage: 1.3 V @ 1 A
• Reverse recovery time: 150 ns (Fast Recovery classification)
• Operating temperature range: -55°C to 150°C
• Moisture sensitivity: MSL 1 (Unlimited)

Allowable Variation:

• Reverse voltage (Vr): Substitute parts may exceed the 100 V rating of the main part, provided all other parameters remain identical or equivalent. Higher voltage ratings maintain backward compatibility in circuits designed for lower voltages.

The CFRM104-HF qualifies as a direct substitute based on identical current, package, forward voltage, recovery time, temperature range, and MSL specifications, with an elevated reverse voltage rating of 400 V.

Parameter Comparison

Engineering Selection Recommendations

CFRM104-HF as Primary Substitute:

The CFRM104-HF is the manufacturer-recommended substitute for the obsolete CFRM102-HF. Selection of this part is based on the following engineering factors:

1. Product Status: The CFRM102-HF is classified as Obsolete. The CFRM104-HF maintains Active product status, ensuring long-term availability and supply chain continuity.

2. Electrical Equivalence: All critical electrical parameters are identical between the two parts: 1 A current rating, 1.3 V forward voltage, 150 ns reverse recovery time, and identical capacitance characteristics. The CFRM104-HF provides a higher reverse voltage rating (400 V vs. 100 V), which maintains full backward compatibility in existing circuit designs.

3. Compliance and Certifications: The CFRM104-HF is ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements. Both parts share identical MSL 1 (Unlimited) moisture sensitivity ratings and EAR99 export classification.

4. Package and Mounting Compatibility: Both parts use identical SOD-123T packaging and Surface Mount technology, enabling direct PCB layout compatibility without redesign.

5. Thermal Performance: Operating temperature range remains -55°C to 150°C, maintaining thermal design margins.

The CFRM104-HF substitution requires no circuit modifications and provides enhanced voltage margin for applications originally designed for the CFRM102-HF.

Frequently Asked Questions (FAQ)

Q: Can the CFRM104-HF be used as a direct replacement for the CFRM102-HF without circuit modifications?

A: Yes. The CFRM104-HF is electrically and mechanically equivalent to the CFRM102-HF for all critical parameters: current rating (1 A), forward voltage (1.3 V @ 1 A), recovery time (150 ns), and package type (SOD-123T). The higher reverse voltage rating (400 V vs. 100 V) provides additional design margin and does not require circuit changes.

Q: What is the significance of the higher reverse voltage rating on the CFRM104-HF?

A: The CFRM104-HF is rated for 400 V DC reverse voltage compared to the CFRM102-HF at 100 V. This higher rating provides greater overvoltage protection and design margin. In circuits originally designed for 100 V operation, the 400 V part operates within its safe operating region with additional headroom. No derating or circuit modification is necessary.

Q: Are the packaging and mounting specifications identical between these parts?

A: Yes. Both the CFRM102-HF and CFRM104-HF use SOD-123T packaging with Surface Mount technology. PCB footprints, solder pad layouts, and pick-and-place machine compatibility are identical. No PCB redesign is required.

Q: What is the difference in reverse leakage current between the two parts?

A: The CFRM102-HF specifies 5 µA reverse leakage at 100 V, while the CFRM104-HF specifies 5 µA reverse leakage at 400 V. Both parts maintain the same leakage current specification at their respective rated voltages, indicating equivalent reverse bias performance characteristics.

Q: Does the CFRM104-HF meet current regulatory compliance standards?

A: Yes. The CFRM104-HF is ROHS3 Compliant and REACH Unaffected. Both parts maintain MSL 1 (Unlimited) moisture sensitivity rating. The CFRM104-HF's Active product status ensures compliance with current and future regulatory requirements.

Q: Are there any thermal or performance differences between these diodes?

A: No. Both parts share identical operating temperature range (-55°C to 150°C), forward voltage characteristics (1.3 V @ 1 A), and reverse recovery time (150 ns). Thermal performance and switching characteristics are equivalent.

Q: Why is the CFRM102-HF classified as Obsolete?

A: The CFRM102-HF is no longer in active production. The CFRM104-HF serves as the current production equivalent, offering identical functionality with enhanced voltage rating and active product support.