B340AX-13 Equivalent & Substitute Parts

Part Overview

The B340AX-13 is a Schottky rectifier diode manufactured by Diodes Incorporated, rated for 40 V DC reverse voltage and 3 A average rectified current in a surface mount SMA (DO-214AC) package. The device 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 component availability, supply chain considerations, or design flexibility within the same functional category.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 3 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Technology	Schottky
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the B340AX-13 are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A
Speed: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Technology: Schottky
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C ~ 150°C

All identified substitute parts meet these core electrical specifications and are housed in the same DO-214AC (SMA) surface mount package. Variations in secondary parameters such as reverse leakage current, capacitance, and packaging format (Tape & Reel versus Cut Tape) do not preclude substitution when primary electrical ratings and thermal operating range are identical.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Package	Temp Range	RoHS Status
B340AX-13	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
B340A-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
B340AE-13	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
B340AQ-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
CDBA340-G	Comchip Technology	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
SK34AHE3-LTP	Micro Commercial Co	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
SX34-AU_R1_000A1	Panjit International Inc.	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant
SX34_R1_00001	Panjit International Inc.	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns	DO-214AC, SMA	-55°C ~ 150°C	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed maintain identical core electrical specifications and thermal operating range as the B340AX-13. Selection among these alternatives is based on the following factors:

Compliance and Certification:

B340AQ-13-F, SK34AHE3-LTP, and SX34-AU_R1_000A1 carry Automotive grade designation with AEC-Q101 qualification, suitable for automotive and high-reliability applications.
All parts are RoHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Packaging Format:

B340AX-13, B340AE-13, B340AQ-13-F, CDBA340-G, SK34AHE3-LTP, and SX34-AU_R1_000A1 are supplied in Tape & Reel (TR) format.
B340A-13-F and SX34_R1_00001 are supplied in Cut Tape (CT) & Digi-Reel® format.

Manufacturer Availability:

Diodes Incorporated parts (B340A-13-F, B340AE-13, B340AQ-13-F) provide direct manufacturer continuity.
Alternative manufacturers (Comchip Technology, Micro Commercial Co, Panjit International Inc.) offer cross-manufacturer compatibility within the same functional specification.

Frequently Asked Questions (FAQ)

Q: Can B340A-13-F replace B340AX-13 in production?

A: Yes. Both parts share identical electrical specifications (40 V, 3 A, 500 mV forward voltage, fast recovery ≤ 500 ns) and operate across the same temperature range (-55°C ~ 150°C). The primary difference is packaging format: B340A-13-F uses Cut Tape & Digi-Reel® while B340AX-13 uses Tape & Reel. Both are housed in DO-214AC (SMA) surface mount packages and are mechanically and electrically interchangeable.

Q: What is the difference between B340AE-13 and B340AQ-13-F?

A: Both parts meet the core electrical specifications for substitution. B340AQ-13-F includes automotive grade designation and AEC-Q101 qualification, making it suitable for automotive applications. B340AE-13 does not carry automotive qualification. Both are supplied in Tape & Reel format and operate across -55°C ~ 150°C.

Q: Are cross-manufacturer substitutes (CDBA340-G, SK34AHE3-LTP, SX34 series) electrically equivalent?

A: Yes. CDBA340-G (Comchip Technology), SK34AHE3-LTP (Micro Commercial Co), SX34-AU_R1_000A1, and SX34_R1_00001 (Panjit International Inc.) all meet the core electrical specifications: 40 V reverse voltage, 3 A average rectified current, 500 mV forward voltage at 3 A, and fast recovery ≤ 500 ns. All are housed in DO-214AC (SMA) surface mount packages and operate across -55°C ~ 150°C. Cross-manufacturer substitution is valid when electrical and thermal specifications are identical.

Q: Does reverse leakage current variation affect substitution eligibility?

A: No. Reverse leakage current values vary among substitute parts (ranging from 100 µA to 500 µA @ 40 V) but do not disqualify substitution. All values remain within acceptable operating parameters for Schottky rectifier diodes in this voltage and current class. The core substitution criteria are based on voltage rating, current rating, forward voltage, speed, package, and temperature range.

Q: Can I use SX34_R1_00001 (Cut Tape format) instead of B340AX-13 (Tape & Reel format)?

A: Yes, electrically and mechanically. Both parts are identical in electrical performance and housed in DO-214AC (SMA) surface mount packages. The difference is packaging format: SX34_R1_00001 is supplied in Cut Tape & Digi-Reel® format while B340AX-13 is supplied in Tape & Reel. Component placement and soldering compatibility remain unchanged.

Q: Which substitute part should I select for automotive applications?

A: B340AQ-13-F, SK34AHE3-LTP, and SX34-AU_R1_000A1 carry Automotive grade designation with AEC-Q101 qualification. These parts are qualified for automotive and high-reliability applications. All other substitutes meet the electrical specifications but do not carry automotive qualification.

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