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Diodes Incorporated APD340VG-G1
- Part No.:
- APD340VG-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
APD340VG-G1.pdf
- Description:
- DIODE SCHOTTKY 40V 3A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:6,443
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Product details
Overview
APD340VG-G1 from Diodes Incorporated is a dual anode, common cathode Schottky barrier rectifier in DO-214AC (SMA) package, rated for 40 V repetitive peak reverse voltage, 3 A average forward current, and 0.5 V max forward voltage at 3 A and +25°C. It serves as a high-frequency, low-loss output rectifier in DC-DC converters and switch-mode power supplies.
For engineers reviewing the APD340VG-G1 datasheet, APD340VG-G1 pinout, APD340VG-G1 application, or APD340VG-G1 equivalent, this device is selected for medium-voltage, high-switching-frequency power conversion where low conduction loss, low noise, and thermal robustness up to +125°C junction temperature are critical design requirements.
Technical Context
The APD340VG-G1 integrates two Schottky diodes sharing a common cathode terminal, enabling dual-channel synchronous or independent rectification in compact layouts. Its low 0.5 V VF at 3 A and 0.5 mA IR at 40 V support high efficiency in buck, flyback, and freewheeling topologies.
Designed for operation up to +125°C junction temperature with 75 °C/W typical junction-to-ambient thermal resistance (on recommended pad layout), it delivers stable performance under transient surge conditions-80 A non-repetitive peak forward surge current (8.3 ms half-sine) confirms ruggedness in pulsed-load applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking capability without breakdown |
| IF(AV) | 3.0 A - Continuous average forward current per diode channel at TA = +25°C |
| VF (max) | 0.5 V @ 3 A, +25°C - Low conduction loss enabling >90% efficiency in 5–12 V output converters |
| IR (max) | 0.5 mA @ 40 V, +25°C - Minimal leakage preserving standby power integrity |
| TJ range | −50°C to +125°C - Supports industrial ambient operation without derating below 3 A |
| IFSM | 80 A (8.3 ms) - Withstands inrush and short-circuit transients in power supply outputs |
| RθJA | 75 °C/W - Requires minimum 5.6 mm × 2.1 mm copper pad for thermal compliance at full load |
Pinout & Package
APD340VG-G1 uses the DO-214AC (SMA) surface-mount plastic package with molded "Green" compound (halogen/antimony-free, RoHS-compliant). Cathode is marked by a green band on the body; terminals are matte tin-annealed over copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Lead 1) | Input node for first Schottky diode | Accepts positive input for independent or parallel rectification path |
| Anode 2 (Lead 2) | Input node for second Schottky diode | Enables dual-output or interleaved converter configurations |
| Cathode (Lead 3) | Common output node | Single low-impedance return path for both channels; connects to output rail or ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Low VF Schottky architecture | 0.5 V max at 3 A ensures <0.15 W conduction loss per diode at full load |
| Guard-ring protected junction | Enhances reliability against mechanical stress and voltage transients during board flex or thermal cycling |
| +125°C operating junction temperature | Eliminates need for external thermal derating in enclosed industrial enclosures |
| Pb-free, halogen-free "Green" packaging | Meets RoHS 3 (2015/863/EU) and JEDEC J-STD-020 moisture sensitivity Level 1 |
| High IFSM surge rating | 80 A single-half-sine withstand enables use without additional TVS clamping in 24 V DC input systems |
Applications
| DC-DC Buck Converter Output Rectification | Active OR-ing Circuit |
|---|---|
Use Scenario: 12 V input to 5 V/3 A output step-down converter operating at 500 kHz switching frequency. IC Role / Device Role / Timing Role: Dual-channel Schottky rectifier providing low-loss synchronous rectification with shared cathode tied to output rail. Use Value: 0.5 V VF minimizes conduction loss (≤1.5 W total), reducing heatsink requirement and improving light-load efficiency vs. silicon diodes. | Use Scenario: Redundant 24 V power rails feeding a single load with automatic failover. IC Role / Device Role / Timing Role: Common-cathode dual diode enabling back-to-back OR-ing with minimal forward drop and no control logic. Use Value: 0.5 V VF ensures <120 mW power dissipation per rail at 3 A, eliminating need for active MOSFET controllers. |
| Freewheeling Diode in Flyback Transformer | Polarity Protection in 24 V Industrial Input Stage |
Use Scenario: Secondary-side freewheeling path in isolated 24 V flyback supply for PLC I/O modules. IC Role / Device Role / Timing Role: Fast-recovery freewheeling element conducting during transformer reset phase. Use Value: 0.5 mA IR at +100°C prevents thermal runaway and maintains regulation stability across −40°C to +85°C ambient. | Use Scenario: Reverse-voltage protection on 24 V DC input of motor driver PCB. IC Role / Device Role / Timing Role: Series-connected Schottky diode blocking reverse polarity while passing forward current. Use Value: 3 A IF(AV) rating supports continuous 2 A load with 50% margin; guard ring prevents cracking-induced failure during connector mating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS34 (DO-214AC) | Same 40 V VRRM, 3 A IF(AV), but VF = 0.55 V @ 3 A; no guard ring | Lacks stress protection; not qualified for high-vibration environments | Lower-cost option where mechanical robustness is non-critical |
| MBR340 (DO-214AC) | Identical electrical specs, but lead finish is SnPb; not RoHS/Green compliant | Not suitable for EU/China export or new industrial designs requiring halogen-free materials | Legacy replacement only when Pb content is acceptable |
Compared with SS34 and MBR340, APD340VG-G1 uniquely combines RoHS 3 compliance, guard-ring reliability, and 0.5 V VF - making it optimal for new industrial DC-DC and OR-ing designs requiring long-term supply continuity and environmental certification.
Availability
APD340VG-G1 is available at Aetrix Electronics and suitable for DC-DC converters, freewheeling circuits, and polarity protection applications requiring stable component supply, RoHS/Green compliance, and thermal resilience up to +125°C junction temperature.
Supply support for APD340VG-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.
The APD340 belongs to Diodes' Schottky rectifier product line, engineered specifically for high-frequency, low-VF power conversion in space-constrained and thermally demanding applications.
FAQ
What is the cathode marking convention for APD340VG-G1?
The cathode is identified by a green band on the DO-214AC package body, aligned with the center pin (Pin 3) in the top-view pinout diagram. This marking is consistent across all RoHS-compliant APD340 variants and matches JEDEC-standard SMA polarity indicators.
Can APD340VG-G1 be used in parallel for higher current handling?
No - APD340VG-G1 contains two diodes sharing a common cathode, not independent devices. Parallel connection requires separate anode/cathode terminals. For >3 A, use multiple APD340VG-G1 units with matched VF and thermal layout, or select a higher-current part like APD540.
Is the 75 °C/W RθJA value measured with or without a heatsink?
The 75 °C/W RθJA is specified with the device mounted on a PCB using Diodes Incorporated's recommended pad layout (5.6 mm × 2.1 mm copper area per terminal), not with an external heatsink. Adding thermal vias or larger copper pours can reduce effective RθJA by 15–25%.
Does APD340VG-G1 support reflow soldering per J-STD-020?
Yes - APD340VG-G1 is rated for moisture sensitivity Level 1 per J-STD-020 and supports standard lead-free reflow profiles (peak 260°C, 20–40 sec above 217°C). The "Green" molding compound remains stable under IPC-A-610 Class 2 thermal stress.
APD340VG-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AC, DO-15, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
- Operating Temperature - Junction:
- -50°C ~ 125°C
APD340VG-G1 FAQ
1.How can I place an order for APD340VG-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for APD340VG-G1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for APD340VG-G1 reliable?
The price and inventory of APD340VG-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for APD340VG-G1 is usually 5 days.
3.What payment methods are accepted for APD340VG-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for APD340VG-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for APD340VG-G1?
APD340VG-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your APD340VG-G1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for APD340VG-G1?
For technical support, including APD340VG-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your APD340VG-G1 requirements.
6.How does Aetrix verify that APD340VG-G1 is sourced from the original manufacturer or authorized distributors?
All APD340VG-G1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that APD340VG-G1 meets industry standards.
7.What is the process for return or replacement of APD340VG-G1?
All APD340VG-G1 units undergo pre-shipment inspection (PSI). If there is an issue with APD340VG-G1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The APD340VG-G1 part is unused and in its original packaging.
Return procedure for APD340VG-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
APD340VG-G1 Tags
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