CDSFR355 Equivalent & Substitute Parts Reference

Part Overview

The CDSFR355 is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 80 V DC reverse voltage and 100 mA average rectified current in a 1005 surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design support and procurement continuity. Substitute parts must maintain identical electrical performance characteristics and compatible mechanical form factors to ensure direct replacement capability in existing circuit designs.

Substiute Parts

CDSFR355

Comchip TechnologyIn Stock: 1096CDSFR355 Datasheet

Current PartRFQ

CDSQR400B

Comchip TechnologyIn Stock: 145506CDSQR400B Datasheet

MFR RecommendedRFQ

CDSF355B

Comchip TechnologyIn Stock: 36423CDSF355B Datasheet

Parametric EquivalentRFQ

CDSF355B-HF

Comchip TechnologyIn Stock: 1200CDSF355B-HF Datasheet

Parametric EquivalentRFQ

CDSFR101A

Comchip TechnologyIn Stock: 1060CDSFR101A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDSFR355 are classified into two categories based on substitution type:

Parametric Equivalents (Same Package): Parts CDSF355B, CDSF355B-HF, and CDSFR101A maintain identical package form factor (1005/SOD-323F) and all critical electrical parameters including reverse voltage (80 V), average rectified current (100 mA), forward voltage (1 V @ 100 mA), and reverse recovery time (4 ns). These parts are direct pin-compatible replacements requiring no circuit board layout modification.

Manufacturer Recommended Substitute (Alternate Package): Part CDSQR400B provides electrical parameter equivalence (80 V, 100 mA, 1 V forward voltage, 4 ns recovery time) but uses a smaller 0402 surface mount package (SOD-923F). This substitution requires circuit board redesign and is applicable only when space constraints or design updates justify package transition.

All substitute parts are manufactured by Comchip Technology and maintain the same technology classification (Standard) and environmental compliance status as the original part.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Layout Changes): Select CDSF355B or CDSF355B-HF when circuit board layout and component placement cannot be modified. Both parts are active products with ROHS3 compliance and identical electrical specifications to the obsolete CDSFR355. CDSF355B offers higher inventory availability (36,400 units) compared to CDSF355B-HF (1,100 units). CDSFR101A is also compatible with identical package form factor and active product status; however, reverse leakage current is specified at 75 V rather than 80 V.

For Optimized Design (Package Transition): Select CDSQR400B when circuit redesign is feasible and space reduction is a design objective. This part maintains all critical electrical parameters while reducing package size from 1005 to 0402. CDSQR400B is an active product with ROHS3 compliance and significantly higher inventory availability (145,448 units), supporting long-term supply chain stability.

All substitute parts carry identical ECCN (EAR99) and HTSUS (8541.10.0070) classifications, ensuring consistent regulatory and trade compliance with the original CDSFR355.

Frequently Asked Questions (FAQ)

Q: Can CDSF355B be used as a direct replacement for CDSFR355 without circuit board modification?

A: Yes. CDSF355B maintains identical package form factor (1005/SOD-323F), pin configuration, and all critical electrical parameters (80 V reverse voltage, 100 mA current rating, 1 V forward voltage, 4 ns recovery time). No circuit board layout changes are required.

Q: What is the difference between CDSF355B and CDSF355B-HF?

A: Both parts share identical electrical specifications and package form factor. The primary difference is inventory availability: CDSF355B has 36,400 units in stock, while CDSF355B-HF has 1,100 units. Selection should be based on procurement lead time requirements and supply chain considerations.

Q: Can CDSQR400B replace CDSFR355 in existing designs?

A: CDSQR400B provides electrical parameter equivalence but uses a smaller 0402 package instead of the 1005 package. Direct substitution on existing circuit boards is not possible without redesign. This part is suitable only for new designs or when circuit board layout revision is planned.

Q: How does CDSFR101A differ from other parametric equivalents?

A: CDSFR101A maintains the same package (1005/SOD-323F) and most electrical parameters as CDSFR355. The reverse leakage current specification differs: CDSFR101A is rated at 50 nA @ 75 V, whereas CDSFR355 is rated at 100 nA @ 80 V. This represents lower leakage performance at a lower reference voltage.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (CDSF355B, CDSF355B-HF, CDSFR101A, CDSQR400B) are ROHS3 compliant. The original CDSFR355 is classified as REACH Unaffected. All parts maintain identical MSL rating (1 - Unlimited) and environmental compliance classification.

Q: What is the maximum junction temperature for all parts?

A: All parts, including CDSFR355 and all substitutes, are rated for a maximum junction temperature of 125°C.