ACDBAT340-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The ACDBAT340-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 40V DC reverse voltage and 3A average rectified current in a 2010 surface mount package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part carries automotive-grade qualification (AEC-Q101) and maintains ROHS3 compliance with unlimited moisture sensitivity rating.

Substiute Parts

ACDBAT340-HF

Comchip TechnologyIn Stock: 1029ACDBAT340-HF Datasheet

Current PartRFQ

B140-M3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 758B140-M3/61T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ACDBAT340-HF requires matching of critical electrical parameters that define functional equivalence in rectifier diode applications. The primary substitution criteria are:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) Maximum: 40V minimum
• Technology: Schottky diode
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA
• RoHS Compliance: ROHS3 Compliant
• Mounting Type: Surface Mount

Current Rating Consideration: The ACDBAT340-HF specifies 3A average rectified current. Substitute parts with equal or greater current ratings maintain functional compatibility. Lower current ratings do not qualify as direct substitutes for applications requiring the full 3A specification.

Package Compatibility: The 2010 (5025 Metric) package defines the physical footprint. Substitute parts may utilize different surface mount packages (such as DO-214AC/SMA) provided the circuit board layout accommodates the alternative package dimensions.

Temperature Range: The ACDBAT340-HF operates from -55°C to 125°C junction temperature. Substitute parts with equal or extended temperature ranges maintain thermal compatibility.

Parameter Comparison

Engineering Selection Recommendations

B140-M3/61T Substitution Criteria:

The B140-M3/61T from Vishay General Semiconductor qualifies as a functional substitute based on the following engineering parameters:

1. Voltage Rating: Both parts specify 40V DC reverse voltage maximum, ensuring equivalent blocking capability.

2. Technology & Speed: Both employ Schottky technology with fast recovery characteristics (≤ 500ns, > 200mA), maintaining switching performance in rectification applications.

3. Compliance Status: The B140-M3/61T maintains ROHS3 compliance and active product status, ensuring continued availability and regulatory alignment.

4. Current Rating Limitation: The B140-M3/61T is rated for 1A average rectified current, compared to the ACDBAT340-HF's 3A rating. This substitute is suitable only for applications requiring ≤ 1A current. Applications demanding the full 3A specification require alternative substitutes with higher current ratings.

5. Package Transition: The substitute utilizes DO-214AC (SMA) surface mount packaging instead of the 2010 package. Circuit board layout modification is required to accommodate the different footprint.

6. Temperature Range: The B140-M3/61T extends the operating temperature range to -65°C to 150°C, providing enhanced thermal margin beyond the original part's -55°C to 125°C specification.

Application Suitability:

Select the B140-M3/61T for low-current rectification circuits (≤ 1A) where the 40V rating and fast recovery characteristics are required. For applications requiring 3A current capacity, alternative substitutes with higher current ratings must be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the B140-M3/61T directly replace the ACDBAT340-HF in all applications?

A: No. The B140-M3/61T is rated for 1A average rectified current, while the ACDBAT340-HF is rated for 3A. Direct replacement is limited to circuits requiring ≤ 1A. Applications requiring 3A operation require substitutes with equivalent or higher current ratings.

Q: What is the primary reason the ACDBAT340-HF requires substitution?

A: The ACDBAT340-HF is classified as obsolete. The B140-M3/61T is an active product with ongoing manufacturing support, ensuring long-term availability and supply chain continuity.

Q: Are there package compatibility issues between the ACDBAT340-HF and B140-M3/61T?

A: Yes. The ACDBAT340-HF uses a 2010 (5025 Metric) package, while the B140-M3/61T uses DO-214AC (SMA) packaging. Circuit board layout and footprint modifications are required for substitution.

Q: Do both parts meet automotive qualification requirements?

A: The ACDBAT340-HF carries AEC-Q101 automotive qualification. The B140-M3/61T data provided does not specify automotive grade qualification. Verify automotive qualification status with the manufacturer if automotive-grade components are required.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Voltage rating (40V), technology (Schottky), speed classification (fast recovery ≤ 500ns), and current rating are the primary determinants. Both parts must match or exceed these specifications for functional equivalence.

Q: How do the reverse leakage currents compare?

A: The ACDBAT340-HF specifies 500 µA reverse leakage at 40V, while the B140-M3/61T specifies 200 µA at 40V. The substitute exhibits lower leakage, which is advantageous in low-power applications.

Q: What is the forward voltage drop difference between these parts?

A: The ACDBAT340-HF specifies 500 mV maximum forward drop at 3A, while the B140-M3/61T specifies 520 mV at 1A. Forward drop characteristics are comparable at their respective rated currents.