ACDBMS140-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The ACDBMS140-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40V DC reverse voltage and 1A average rectified current in a surface mount SOD-123F package. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance. Equivalent and substitute parts are identified when design requirements permit higher current ratings, alternative sourcing, or inventory optimization while maintaining electrical and mechanical compatibility within the SOD-123F package form factor.

Substiute Parts

ACDBMS140-HF

Comchip TechnologyIn Stock: 908ACDBMS140-HF Datasheet

Current PartRFQ

CDBMS140-HF

Comchip TechnologyIn Stock: 3368CDBMS140-HF Datasheet

Parametric EquivalentRFQ

STPS2L40ZFY

STMicroelectronicsIn Stock: 4161STPS2L40ZFY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ACDBMS140-HF is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 40V
• Package / Case: Must be SOD-123F
• Technology: Must be Schottky
• Mounting Type: Must be Surface Mount
• RoHS Status: Must be ROHS3 Compliant
• Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Allowable Variation Parameters:

• Current - Average Rectified (Io): May be equal to or greater than 1A
• Voltage - Forward (Vf) (Max) @ If: May vary with different current ratings
• Current - Reverse Leakage @ Vr: May be lower than specified
• Operating Temperature - Junction: May have extended range
• Capacitance @ Vr, F: May vary
• Grade and Qualification: May include automotive-grade alternatives

Two substitute parts meet these criteria and are grouped as follows:

Parametric Equivalent (Direct Replacement): CDBMS140-HF by Comchip Technology matches all electrical and mechanical parameters identically to the main part.

Manufacturer Recommended Substitute (Higher Current Rating): STPS2L40ZFY by STMicroelectronics provides 2A current capacity within the same package, suitable for applications requiring higher current handling while maintaining 40V reverse voltage rating.

Parameter Comparison

Engineering Selection Recommendations

CDBMS140-HF Selection Criteria: The CDBMS140-HF is a parametric equivalent offering identical electrical specifications to the ACDBMS140-HF. Both parts are manufactured by Comchip Technology, maintain ROHS3 compliance, and carry MSL 1 rating. Selection of CDBMS140-HF is appropriate for direct replacement in existing designs or when alternative sourcing from the same manufacturer is required. Current inventory availability is 3270 pieces.

STPS2L40ZFY Selection Criteria: The STPS2L40ZFY is a manufacturer-recommended substitute suitable for applications where current capacity exceeding 1A is required within the 40V reverse voltage specification. This STMicroelectronics part maintains SOD-123F package compatibility, AEC-Q101 automotive qualification, and ROHS3 compliance. The extended operating temperature range (-40°C to 175°C) and lower reverse leakage current (35 µA versus 500 µA) provide enhanced performance characteristics. Forward voltage at 2A operation is 630 mV. Selection is appropriate when circuit design permits higher current handling or when STMicroelectronics sourcing is preferred. Current inventory availability is 4100 pieces.

Compatibility Constraints: All three parts share identical package form factor (SOD-123F), technology classification (Schottky), and mounting methodology (Surface Mount). Reverse voltage rating of 40V is common across all options. Substitution between these parts does not require PCB layout modification or thermal management redesign beyond the original design specifications.

Frequently Asked Questions (FAQ)

Q: Can CDBMS140-HF be used as a direct replacement for ACDBMS140-HF?

A: Yes. CDBMS140-HF is a parametric equivalent with identical electrical specifications, package form factor, and compliance ratings. No circuit modification is required.

Q: What is the primary difference between ACDBMS140-HF and STPS2L40ZFY?

A: The STPS2L40ZFY provides 2A average rectified current capacity compared to 1A in the ACDBMS140-HF, while maintaining the same 40V reverse voltage rating and SOD-123F package. Forward voltage at rated current is higher (630 mV @ 2A versus 520 mV @ 1A). Reverse leakage current is significantly lower (35 µA versus 500 µA).

Q: Are all three parts suitable for automotive applications?

A: ACDBMS140-HF and STPS2L40ZFY carry explicit automotive grade designation and AEC-Q101 qualification. CDBMS140-HF does not specify automotive grade or AEC-Q101 qualification in the provided data. Automotive application requirements should be verified against design specifications.

Q: Does package compatibility exist between these parts?

A: Yes. All three parts use SOD-123F surface mount package. No PCB layout changes are required for substitution.

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

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Q: Can STPS2L40ZFY be used in a circuit designed for 1A operation?

A: Yes. STPS2L40ZFY is rated for 2A operation and is fully compatible with circuits requiring 1A or lower current. The higher current rating provides design margin without circuit modification.

Q: What is the temperature operating range difference?

A: ACDBMS140-HF and CDBMS140-HF operate from -50°C to 125°C. STPS2L40ZFY extends to -40°C to 175°C, providing a wider high-temperature operating window.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant.