CDSUR400B Equivalent & Substitute Parts

Part Overview

The CDSUR400B 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 surface mount 0603/SOD-523F package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging format preferences, or supply chain considerations.

Substiute Parts

CDSUR400B

Comchip TechnologyIn Stock: 900CDSUR400B Datasheet

Current PartRFQ

CDSU101A

Comchip TechnologyIn Stock: 18313CDSU101A Datasheet

Parametric EquivalentRFQ

CDSU400B

Comchip TechnologyIn Stock: 1720CDSU400B Datasheet

Parametric EquivalentRFQ

CDSU400B-HF

Comchip TechnologyIn Stock: 20179CDSU400B-HF Datasheet

Parametric EquivalentRFQ

CDSUR101A

Comchip TechnologyIn Stock: 4272CDSUR101A Datasheet

Parametric EquivalentRFQ

CDSUR400

Comchip TechnologyIn Stock: 1016CDSUR400 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDSUR400B are qualified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Voltage - DC Reverse (Vr) (Max): 80 V
• Current - Average Rectified (Io): 100 mA
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 100 mA
• Reverse Recovery Time (trr): 4 ns
• Capacitance @ Vr, F: 3 pF @ 0.5V, 1MHz
• Operating Temperature - Junction (Max): 125°C

Mechanical Parameters (Must Match):

• Package / Case: 2-SMD, No Lead
• Supplier Device Package: 0603/SOD-523F
• Mounting Type: Surface Mount
• Technology: Standard
• Speed: Small Signal ≤ 200mA (Io), Any Speed

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Product Status: Active

Substitute parts may differ in packaging format (Tape & Reel vs. Cut Tape & Digi-Reel®) and reverse leakage current specifications within acceptable ranges. All qualified substitutes maintain identical electrical performance and physical form factor compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity. Selection between CDSUR400B and its equivalents is determined by packaging format availability and inventory levels:

Tape & Reel (TR) Format Options:

• CDSU400B: 1684 Pcs in stock
• CDSU400B-HF: 20100 Pcs in stock (highest availability)
• CDSUR101A: 4236 Pcs in stock
• CDSUR400: 953 Pcs in stock

Cut Tape & Digi-Reel® Format Option:

• CDSU101A: 18282 Pcs in stock (highest availability in alternative packaging)

All parts are manufactured by Comchip Technology and carry identical electrical specifications for the primary application parameters. Reverse leakage current differs between CDSUR400B/CDSU400B/CDSUR400 (100 nA @ 80 V) and CDSU101A/CDSUR101A (50 nA @ 75 V), with the latter offering lower leakage characteristics. Selection should account for application-specific leakage requirements and packaging format constraints.

Frequently Asked Questions (FAQ)

Q: Can CDSU400B-HF replace CDSUR400B directly?

A: Yes. CDSU400B-HF maintains identical electrical parameters: 80 V reverse voltage, 100 mA average rectified current, 1 V forward voltage at 100 mA, 4 ns reverse recovery time, and 3 pF capacitance. Both use 0603/SOD-523F surface mount packaging. The primary difference is packaging format (Tape & Reel) and higher inventory availability.

Q: What is the difference between CDSU101A and CDSUR101A?

A: Both parts are electrically equivalent with 80 V reverse voltage and 100 mA current rating. The difference is packaging format: CDSU101A is supplied in Cut Tape & Digi-Reel® format, while CDSUR101A is supplied in Tape & Reel format. Both exhibit lower reverse leakage current (50 nA @ 75 V) compared to the CDSUR400B specification (100 nA @ 80 V).

Q: Are all substitutes compatible with the same PCB footprint?

A: Yes. All substitute parts use the 0603/SOD-523F surface mount package with 2-SMD, No Lead configuration. PCB footprint compatibility is guaranteed across all listed alternatives.

Q: Does reverse leakage current difference affect substitution?

A: Reverse leakage current specifications differ between part groups. CDSUR400B, CDSU400B, and CDSUR400 specify 100 nA @ 80 V, while CDSU101A and CDSUR101A specify 50 nA @ 75 V. Selection depends on application leakage requirements. Lower leakage parts (CDSU101A/CDSUR101A) are suitable for applications requiring reduced reverse current.

Q: What is the MSL rating and why does it matter?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage, handling, or assembly, simplifying supply chain management.

Q: Are all parts ROHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance, ensuring regulatory conformance for applications subject to RoHS directives.

Q: Which substitute offers the best inventory availability?

A: CDSU400B-HF provides the highest inventory level at 20100 Pcs. CDSU101A offers the highest availability in alternative packaging format (Cut Tape & Digi-Reel®) at 18282 Pcs.