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Diodes Incorporated DBF310-13
- Part No.:
- DBF310-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Flat Leads
- Datasheet:
-
DBF310-13.pdf
- Description:
- BRIDGE RECT 1PHASE 1KV 3A DBF
- Quantity:
- Payment:
- Shipping:
Inventory:9,839
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Product details
Overview
DBF310 from Diodes Incorporated is a glass passivated surface-mount bridge rectifier rated for 1000 V peak repetitive reverse voltage, 3 A average output current, and 110 A non-repetitive surge current; it delivers 0.95 V forward voltage at 3 A and 5 μA leakage at 1000 V, used in AC/DC conversion for LED lighting drivers and SMPS input stages.
For engineers reviewing the DBF310 datasheet, DBF310 pinout, DBF310 application, or DBF310 equivalent, key selection criteria include reverse voltage margin, thermal resistance (RθJC = 5 °C/W), surge robustness (110 A IFSM), and RoHS-compliant lead-free plating for SMT reflow compatibility.
Technical Context
This discrete bridge rectifier integrates four silicon diodes in a single DBF package with common-cathode and common-anode configuration, enabling full-wave rectification without external interconnects. Its glass passivation ensures stable junction characteristics under thermal cycling and humidity exposure.
Designed for high-voltage, medium-current switching power supplies, it supports operation from –55 °C to +150 °C with 700 V RMS reverse rating and derated current handling above 120 °C case temperature per the published derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands peak line transients up to 1 kV in universal-input AC/DC front-ends |
| IO (at TC = 120°C) | 3.0 A - Continuous DC output capability when mounted on 15 mm × 15 mm copper pad |
| VF (at IF = 3 A) | 0.95 V - Low conduction loss reduces heat generation in compact adapters and chargers |
| IFSM (8.3 ms) | 110 A - Survives cold-start inrush surges in offline SMPS without failure |
| IR (at VR = 1000 V, TA = 25°C) | 5 μA - Minimal leakage preserves efficiency in high-impedance bias networks |
| RθJC | 5 °C/W - Enables direct thermal coupling to heatsink or PCB copper for reliable 3 A operation |
| CT (at VR = 4 V) | 35 pF - Low junction capacitance minimizes EMI in high-frequency switching environments |
Pinout & Package
Package: DBF - Molded plastic, UL 94V-0 rated, 8.5 mm × 6.45 mm × 1.3 mm body, lead-free matte tin terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input Anode | One AC input terminal connected internally to anode of D1 and cathode of D2 |
| AC2 | Input Cathode | Second AC input terminal connected internally to cathode of D1 and anode of D2 |
| + (Anode Common) | DC Positive Output | Common anode node of D3 and D4; delivers rectified positive rail |
| – (Cathode Common) | DC Negative Output | Common cathode node of D1 and D2; serves as return path and ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die construction | Prevents junction degradation during humid storage and reflow, extending field life in consumer-grade environments |
| Surge overload rating: 110 A (8.3 ms) | Accommodates repeated cold-start events in battery charger and adapter applications without parameter shift |
| Lead-free, halogen- and antimony-free "Green" finish | Meets RoHS 3 (2015/863/EU) and automotive change-control requirements when specified |
| Miniature DBF package footprint | Reduces board area by >30% vs. traditional KBP or GBU packages while maintaining 3 A rating |
Applications
| LED Lighting Driver Input Stage | Universal Input SMPS Front-End |
|---|---|
Use Scenario: Rectifying 85–265 VAC mains in constant-current LED drivers for commercial downlights. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC input to pulsating DC prior to PFC stage. Use Value: 1000 V VRRM provides 2× safety margin over 265 VAC peak (375 V), minimizing risk of avalanche failure during line surges. | Use Scenario: Input rectification in 30–65 W open-frame AC/DC adapters for IoT gateways. IC Role / Device Role / Timing Role: Discrete bridge providing isolated DC bus for flyback controller ICs like UCC28704. Use Value: 5 °C/W RθJC allows direct mounting to metal-core PCBs, eliminating need for external heatsinks in space-constrained designs. |
| USB-C PD Wall Charger Secondary Side | Home Appliance Power Supply |
Use Scenario: Output rectification in dual-output flyback converters delivering 5 V/3 A and 20 V/3 A. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-cost, high-volume USB-C chargers where cost and reliability dominate. Use Value: 0.95 V VF at 3 A yields <0.5 W conduction loss per leg-lower than Schottky alternatives at same current density. | Use Scenario: Mains rectification in washing machine control boards operating across global voltage ranges. IC Role / Device Role / Timing Role: Primary-side bridge supplying bulk DC to microcontroller, motor driver, and display subsystems. Use Value: –55 °C to +150 °C operating range ensures uninterrupted function during extended high-temperature spin cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSB30M-13 | Same DBF package, 1000 V VRRM, 3 A IO, but lower VF (0.85 V typ. at 3 A) and higher IFSM (130 A) | Direct replacement recommended by Diodes; improved surge margin and conduction efficiency | Select MSB30M-13 for new designs requiring extended lifecycle support and tighter VF tolerance |
| GBU6K | Through-hole GBU package, same 1000 V/3 A rating, but larger footprint and higher RθJA (25 °C/W) | Requires PCB redesign; unsuitable for high-density SMT layouts | Retain only for legacy through-hole production or where manual assembly is preferred |
Compared with DBF310, MSB30M-13 offers superior surge robustness and lower forward loss for next-gen compact adapters, while GBU6K trades board space for mechanical ruggedness in industrial repair scenarios.
Availability
DBF310 is available at Aetrix Electronics and suitable for LED lighting drivers, universal-input SMPS, and home appliance power supplies requiring stable component supply despite its obsolete status.
Supply support for DBF310 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, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1959.
The DBF series targets high-reliability, high-voltage AC/DC conversion in space-constrained SMT applications, emphasizing thermal performance, surge resilience, and regulatory compliance for global power electronics.
FAQ
Is DBF310 still in production?
No - Diodes Incorporated has officially discontinued DBF310 and marked it obsolete per DS39407 Rev. 5-4. It remains available through authorized distributors for legacy design support and last-time buys, but no new wafer fabrication is scheduled. Customers are advised to migrate to MSB30M-13 for long-term supply assurance.
What is the thermal resistance from junction to case (RθJC) for DBF310?
The typical thermal resistance from junction to case is 5 °C/W per element, measured with the device mounted on a 1 oz/ft², 15 mm × 15 mm copper pad per pin. This value enables effective heat transfer to external copper pours or heatsinks in high-power-density layouts without forced airflow.
Can DBF310 be used in automotive applications?
DBF310 itself is not AEC-Q200 qualified. However, Diodes offers automotive-grade variants (e.g., MSB30M-AU) with PPAP documentation, IATF 16949 manufacturing, and AEC-Q200 stress testing. For automotive use, contact Diodes' automotive team to obtain qualified equivalents with full change control and qualification reports.
What does the marking "YM" indicate on the DBF310 package?
"Y" is the last digit of the year (e.g., "5" = 2025), and "M" is the month code per Diodes' date code table (e.g., "1" = January, "D" = April). The full marking format is "DBF310 YMD", where "D" represents day (1–9 as digits, 10–31 as letters A–V), enabling full traceability to wafer lot and assembly batch.
DBF310-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 1 kV
- Current - Average Rectified (Io):
- 3 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DBF
DBF310-13 FAQ
1.How can I place an order for DBF310-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for DBF310-13 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 DBF310-13 reliable?
The price and inventory of DBF310-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DBF310-13 is usually 5 days.
3.What payment methods are accepted for DBF310-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DBF310-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DBF310-13?
DBF310-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DBF310-13 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 DBF310-13?
For technical support, including DBF310-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DBF310-13 requirements.
6.How does Aetrix verify that DBF310-13 is sourced from the original manufacturer or authorized distributors?
All DBF310-13 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 DBF310-13 meets industry standards.
7.What is the process for return or replacement of DBF310-13?
All DBF310-13 units undergo pre-shipment inspection (PSI). If there is an issue with DBF310-13, 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 DBF310-13 part is unused and in its original packaging.
Return procedure for DBF310-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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