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VS-MBRD340-M3
Vishay General Semiconductor - Diodes Division
DIODE SCHOTTKY 40V 3A TO252
30440 Pcs New Original In Stock
Diode 40 V 3A Surface Mount TO-252AA (DPAK)
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5.0 / 5.0
- (437 Ratings)
VS-MBRD340-M3
Product Overview
12787101
DiGi Electronics Part Number
VS-MBRD340-M3-DGManufacturer
Vishay General Semiconductor - Diodes Division
VS-MBRD340-M3
Description
DIODE SCHOTTKY 40V 3A TO252Inventory
30440 Pcs New Original In Stock
Diode 40 V 3A Surface Mount TO-252AA (DPAK)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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VS-MBRD340-M3 Technical Specifications
Category
Diodes, Rectifiers, Single Diodes
Packaging
Tube
Series
-
Product Status
Active
Technology
Schottky
Voltage - DC Reverse (Vr) (Max)
40 V
Current - Average Rectified (Io)
3A
Voltage - Forward (Vf) (Max) @ If
600 mV @ 3 A
Speed
Fast Recovery =< 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr
200 µA @ 40 V
Capacitance @ Vr, F
189pF @ 5V, 1MHz
Mounting Type
Surface Mount
Package / Case
TO-252-3, DPAK (2 Leads + Tab), SC-63
Supplier Device Package
TO-252AA (DPAK)
Operating Temperature - Junction
-40°C ~ 150°C
Base Product Number
MBRD340
Datasheet & Documents
HTML Datasheet
VS-MBRD340-M3-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
112-VS-MBRD340-M3
VSMBRD340M3
VS-MBRD340-M3-DG
Standard Package
75
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
MBRD340
Vishay General Semiconductor - Diodes Division
30451
MBRD340-DG
0.1946
Parametric Equivalent
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Leurs prix sont très compétitifs et leur support après-vente est d’une efficacité remarquable.
Dec 02, 2025
Les produits de DiGi Electronics surpassent souvent mes attentes. La qualité est incomparable.
Dec 02, 2025
Their support team is proactive and professional, providing timely solutions whenever required.
Dec 02, 2025
Customer support is quick to resolve issues, making me feel valued as a client.
Dec 02, 2025
Their low prices and sustainable packaging demonstrate their dedication to customers and the environment.
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Frequently Asked Questions (FAQ)
Can the VS-MBRD340-M3 Schottky diode be safely used as a drop-in replacement for the STMicroelectronics STPS3L40U in a 24V/3A DC-DC buck converter output stage, and what thermal or efficiency trade-offs should I expect?
The VS-MBRD340-M3 is electrically compatible with the STPS3L40U in many 24V/3A applications due to similar 40V reverse voltage and 3A forward current ratings. However, the VS-MBRD340-M3 has a slightly higher forward voltage (600 mV vs. ~550 mV for STPS3L40U at 3A), which increases conduction losses by approximately 15–20 mW. Additionally, its reverse leakage current (200 µA @ 40V) is higher than the STPS3L40U’s (~50 µA), potentially impacting efficiency in light-load conditions. Ensure adequate PCB copper area for heat dissipation, as the TO-252AA package’s thermal performance depends heavily on layout. Always validate thermal rise under worst-case ambient conditions before full deployment.
What are the critical layout considerations when designing a high-frequency switching circuit with the VS-MBRD340-M3 to avoid parasitic oscillations and EMI issues?
When integrating the VS-MBRD340-M3 in high-frequency applications (e.g., >100 kHz), minimize loop inductance by placing the diode as close as possible to the switching node and output capacitor. Use a solid ground plane beneath the TO-252AA tab and connect the tab directly to the cathode net with multiple vias to reduce thermal and electrical impedance. Avoid long anode traces, which can act as antennas. The 189pF junction capacitance at 5V may interact with stray inductance, so consider adding a small RC snubber if ringing exceeds 30% of Vf during turn-off. These steps mitigate EMI and prevent false triggering in adjacent control circuits.
Is the VS-MBRD340-M3 suitable for reverse polarity protection in automotive 12V systems where load dump transients up to 40V may occur, and how does its reliability compare to the ON Semiconductor MBRD340T4G?
Yes, the VS-MBRD340-M3 can be used for reverse polarity protection in 12V automotive systems, as its 40V Vr(max) rating meets typical load dump requirements (ISO 7637-2). However, unlike the MBRD340T4G—which is AEC-Q101 qualified—the VS-MBRD340-M3 lacks formal automotive qualification, making it riskier for safety-critical applications. Its MSL 1 rating allows unlimited floor life, simplifying handling, but long-term reliability under under-hood temperature cycling (-40°C to 150°C junction) should be validated empirically. For non-safety systems (e.g., infotainment), it’s acceptable; for powertrain or ADAS, prefer AEC-Q101 parts.
How does the reverse recovery behavior of the VS-MBRD340-M3 impact efficiency in a synchronous buck converter operating at 500 kHz, and could it cause cross-conduction in the low-side MOSFET?
Although the VS-MBRD340-M3 is labeled 'Fast Recovery ≤500ns,' Schottky diodes inherently have negligible reverse recovery charge (Qrr), making them ideal for high-frequency synchronous buck converters. At 500 kHz, the absence of reverse recovery spikes reduces switching losses and minimizes voltage overshoot on the low-side MOSFET. This significantly lowers the risk of cross-conduction or shoot-through, provided dead-time is properly configured. However, ensure the gate driver can handle the slight capacitive loading from the diode’s 189pF junction capacitance. Overall, the VS-MBRD340-M3 improves efficiency by 1–2% compared to standard PN rectifiers in this topology.
What derating guidelines should I follow when using the VS-MBRD340-M3 in an enclosed industrial power supply with ambient temperatures reaching 70°C, and how does its thermal performance compare to the DPAK-packaged Infineon BSC040N04LS6?
At 70°C ambient, derate the VS-MBRD340-M3’s average forward current to approximately 2.1A (30% derating from 3A) to maintain junction temperature below 150°C, assuming minimal heatsinking. The TO-252AA package relies on PCB copper for heat spreading—use at least 2 in² of 2 oz copper connected to the tab. Compared to the Infineon BSC040N04LS6 (a MOSFET, not a diode), the VS-MBRD340-M3 has higher conduction losses but superior simplicity and cost for <5A applications. If efficiency is critical above 2.5A continuous, consider a synchronous rectifier; otherwise, the VS-MBRD340-M3 offers a robust, low-part-count solution with proper thermal design.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
VS-MBRD340-M3 CAD Models
Vishay General Semiconductor - Diodes Division VS-MBRD340-M3 PCB symbols & footprints
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