MBRD340 Equivalent & Substitute Parts

Part Overview

The MBRD340 is a Schottky rectifier diode rated for 40 V DC reverse voltage and 3 A average rectified current in a surface mount DPAK package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	600 mV @ 3 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200 µA @ 40 V	—
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Operating Temperature - Junction	-65°C ~ 150°C	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MBRD340 are classified based on electrical parameter compatibility and product status. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 3 A minimum
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Package / Case: TO-252-3, DPAK or equivalent surface mount package

Substitution Categories:

Direct Equivalents (Identical Electrical and Package Specifications): Parts that match all critical parameters with identical or superior electrical characteristics and the same DPAK package form factor. These parts are interchangeable without circuit modification.

Functional Equivalents (Matching Electrical Specifications, Different Packaging): Parts that meet or exceed all electrical requirements but utilize alternative surface mount packages. These require PCB layout adjustment but maintain electrical compatibility.

Partial Equivalents (Reduced Current Rating): Parts that meet voltage and speed requirements but with reduced current ratings. These are suitable only for applications where the full 3 A rating is not required.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Product Status	RoHS Status
MBRD340	onsemi	40	3	600 @ 3A	200 @ 40V	TO-252-3, DPAK	Obsolete	RoHS non-compliant
MBRD340	Vishay General Semiconductor - Diodes Division	40	3	600 @ 3A	200 @ 40V	TO-252-3, DPAK	Obsolete	RoHS non-compliant
CSHD3-40 TR13 PBFREE	Central Semiconductor Corp	40	3	650 @ 3A	100 @ 40V	TO-252-3, DPAK	Active	ROHS3 Compliant
VS-MBRD340-M3	Vishay General Semiconductor - Diodes Division	40	3	600 @ 3A	200 @ 40V	TO-252-3, DPAK	Active	ROHS3 Compliant
VS-MBRD340TR-M3	Vishay General Semiconductor - Diodes Division	40	3	600 @ 3A	200 @ 20V	TO-252-3, DPAK	Active	ROHS3 Compliant
VS-MBRD340TRL-M3	Vishay General Semiconductor - Diodes Division	40	3	600 @ 3A	200 @ 20V	TO-252-3, DPAK	Active	ROHS3 Compliant
BAT165E6327HTSA1	Infineon Technologies	40	0.75	740 @ 750mA	50 @ 40V	SC-76, SOD-323	Active	ROHS3 Compliant
RB051L-40TE25	Rohm Semiconductor	20	3	450 @ 3A	1000 @ 20V	DO-214AC, SMA	Not For New Designs	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: VS-MBRD340-M3 or VS-MBRD340TR-M3

The Vishay General Semiconductor - Diodes Division parts VS-MBRD340-M3 and VS-MBRD340TR-M3 are direct functional equivalents to the obsolete MBRD340. Both parts maintain identical electrical specifications (40 V, 3 A, 600 mV forward voltage) and the same DPAK package form factor. Both are active products with ROHS3 compliance, providing long-term availability and regulatory compliance for new designs. The primary difference is packaging format: VS-MBRD340-M3 is supplied in Tube packaging, while VS-MBRD340TR-M3 is supplied in Tape & Reel format for automated assembly.

Secondary Recommendation: CSHD3-40 TR13 PBFREE

The Central Semiconductor Corp CSHD3-40 TR13 PBFREE meets all critical electrical parameters with 40 V reverse voltage and 3 A current rating in the same DPAK package. This part is active and ROHS3 compliant. Forward voltage is specified at 650 mV @ 3 A, which is 50 mV higher than the MBRD340 but remains within acceptable operating margins for most applications. Reverse leakage is specified at 100 µA @ 40 V, which is lower than the original part, indicating superior leakage characteristics.

Not Recommended for Direct Substitution: BAT165E6327HTSA1

The Infineon BAT165E6327HTSA1 is a 40 V Schottky diode but with a maximum current rating of 750 mA, which is insufficient for applications requiring the full 3 A capability of the MBRD340. This part is suitable only for low-current applications and requires different PCB layout due to its SOD-323 package.

Not Recommended for Direct Substitution: RB051L-40TE25

The Rohm Semiconductor RB051L-40TE25 has a reduced reverse voltage rating of 20 V, which is below the 40 V specification of the MBRD340. This part is classified as "Not For New Designs" and is unsuitable for applications requiring 40 V reverse voltage capability.

Frequently Asked Questions (FAQ)

Q: Can I use VS-MBRD340-M3 as a direct replacement for the obsolete MBRD340?

A: Yes. The VS-MBRD340-M3 is electrically and mechanically identical to the MBRD340, with identical voltage (40 V), current (3 A), forward voltage (600 mV @ 3 A), and package specifications (TO-252-3, DPAK). The primary difference is that VS-MBRD340-M3 is an active product with ROHS3 compliance, whereas the original MBRD340 is obsolete and RoHS non-compliant.

Q: What is the difference between VS-MBRD340-M3 and VS-MBRD340TR-M3?

A: Both parts are electrically identical with matching voltage, current, and thermal specifications. The difference is in packaging format: VS-MBRD340-M3 is supplied in Tube packaging for manual handling and small-volume applications, while VS-MBRD340TR-M3 is supplied in Tape & Reel format for automated pick-and-place assembly. Both use the same DPAK package form factor and are pin-compatible.

Q: Is CSHD3-40 TR13 PBFREE a suitable alternative?

A: Yes, for most applications. The CSHD3-40 TR13 PBFREE meets all critical electrical specifications with 40 V reverse voltage and 3 A current rating in the same DPAK package. The forward voltage is specified at 650 mV @ 3 A, which is 50 mV higher than the MBRD340. This difference is typically acceptable in rectifier applications but should be verified against circuit design margins. The part is active and ROHS3 compliant.

Q: Can I use BAT165E6327HTSA1 as a substitute?

A: No, not for applications requiring the full 3 A current rating. The BAT165E6327HTSA1 is rated for only 750 mA average rectified current, which is 75% below the MBRD340 specification. This part is suitable only for low-current applications. Additionally, the SOD-323 package requires different PCB layout compared to the DPAK package of the MBRD340.

Q: Why is RB051L-40TE25 not recommended?

A: The RB051L-40TE25 has a maximum reverse voltage rating of 20 V, which is insufficient for applications designed for the 40 V MBRD340. Using this part in a 40 V application would result in diode failure. Additionally, this part is classified as "Not For New Designs" by the manufacturer, indicating end-of-life status.

Q: What are the key parameters I should verify when selecting a substitute?

A: The critical parameters for MBRD340 substitution are: (1) Voltage - DC Reverse (Vr) minimum 40 V, (2) Current - Average Rectified (Io) minimum 3 A, (3) Technology: Schottky, (4) Speed: Fast Recovery ≤ 500ns, (5) Mounting Type: Surface Mount, and (6) Package compatibility with TO-252-3 DPAK or equivalent surface mount package. Forward voltage and reverse leakage should be compared against circuit design requirements.

Q: Are there any RoHS compliance considerations?

A: Yes. The original MBRD340 is RoHS non-compliant. All recommended substitutes (VS-MBRD340-M3, VS-MBRD340TR-M3, and CSHD3-40 TR13 PBFREE) are ROHS3 compliant, making them suitable for applications subject to RoHS regulations. If your application requires RoHS non-compliant components, the obsolete MBRD340 may still be available from inventory, but long-term availability is not guaranteed.

Q: What is the operating temperature range for substitute parts?

A: The original MBRD340 operates from -65°C to 150°C junction temperature. The Vishay substitutes (VS-MBRD340-M3, VS-MBRD340TR-M3, VS-MBRD340TRL-M3) operate from -40°C to 150°C, which covers most industrial and commercial applications. The Central Semiconductor CSHD3-40 TR13 PBFREE maintains the full -65°C to 150°C range. Verify that the reduced lower temperature limit of Vishay parts is acceptable for your application.

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