MBRA340T3H Schottky Diode Equivalent & Substitute Parts

Part Overview

The MBRA340T3H is a surface mount Schottky diode manufactured by onsemi, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AC (SMA) package. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure procurement availability for applications requiring 40 V, 3 A Schottky rectification in surface mount form factor.

Substiute Parts

MBRA340T3H

onsemiIn Stock: 1057MBRA340T3H Datasheet

Current PartRFQ

MBRA340T3G

onsemiIn Stock: 20339MBRA340T3G Datasheet

DirectRFQ

B340A-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 62230B340A-E3/61T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MBRA340T3H are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 3 A
• Mounting Type: Surface Mount
• Package / Case: DO-214AC, SMA
• Technology: Schottky
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Variation Parameters:

• Voltage - Forward (Vf) (Max) @ If: Within component design tolerance
• Current - Reverse Leakage @ Vr: Within component design tolerance
• Operating Temperature - Junction: Equal or extended range acceptable
• RoHS Status: ROHS3 Compliant required

Substitute parts must maintain identical voltage and current ratings, surface mount configuration, and Schottky technology classification. Forward voltage and reverse leakage current variations are acceptable within manufacturer specifications for the same voltage and current class.

Parameter Comparison

Engineering Selection Recommendations

MBRA340T3G (Direct Substitute - onsemi)

The MBRA340T3G is the direct equivalent to the obsolete MBRA340T3H. Both components are manufactured by onsemi and share identical electrical specifications: 40 V reverse voltage, 3 A average rectified current, 450 mV forward voltage at 3 A, and 300 µA reverse leakage current at 40 V. The MBRA340T3G maintains active product status with ROHS3 compliance and REACH unaffected certification. This part is the primary selection for direct replacement of the MBRA340T3H.

B340A-E3/61T (Cross-Manufacturer Substitute - Vishay)

The B340A-E3/61T is a Vishay General Semiconductor equivalent providing identical voltage and current ratings (40 V, 3 A) in the same DO-214AC (SMA) surface mount package. This part exhibits higher forward voltage (550 mV @ 3 A versus 450 mV) and higher reverse leakage current (500 µA @ 40 V versus 300 µA), but maintains fast recovery speed characteristics and extended operating temperature range (-65°C to 150°C). The B340A-E3/61T is active product status with ROHS3 compliance and REACH unaffected certification. Selection of this part requires circuit analysis to confirm that the increased forward voltage drop and reverse leakage current are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can MBRA340T3G be used as a direct replacement for MBRA340T3H?

A: Yes. The MBRA340T3G is a direct equivalent manufactured by onsemi with identical electrical specifications and package configuration. Both components are Schottky diodes rated for 40 V reverse voltage and 3 A average rectified current in DO-214AC (SMA) surface mount package.

Q: What are the differences between MBRA340T3G and B340A-E3/61T?

A: Both parts meet the core voltage and current requirements (40 V, 3 A). The MBRA340T3G has lower forward voltage (450 mV @ 3 A) and lower reverse leakage current (300 µA @ 40 V). The B340A-E3/61T has higher forward voltage (550 mV @ 3 A) and higher reverse leakage current (500 µA @ 40 V), but offers extended low-temperature operation (-65°C minimum versus -55°C). Both are active products with ROHS3 compliance.

Q: Are all substitute parts in the same package?

A: Yes. The MBRA340T3H, MBRA340T3G, and B340A-E3/61T are all housed in DO-214AC (SMA) surface mount package with identical footprint and pinout compatibility.

Q: What is the significance of the forward voltage difference between MBRA340T3G and B340A-E3/61T?

A: The MBRA340T3G exhibits 450 mV forward voltage at 3 A, while the B340A-E3/61T exhibits 550 mV at the same current. This 100 mV difference affects power dissipation and thermal performance. Applications with tight thermal budgets or high-frequency switching should account for this variation in circuit design calculations.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. The MBRA340T3H, MBRA340T3G, and B340A-E3/61T are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference in reverse leakage current between the parts?

A: The MBRA340T3H and MBRA340T3G both specify 300 µA reverse leakage current at 40 V. The B340A-E3/61T specifies 500 µA at 40 V. Applications sensitive to leakage current, particularly in high-impedance circuits, should consider this parameter when selecting between onsemi and Vishay options.