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Diodes Incorporated RDBF31-13
- Part No.:
- RDBF31-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Flat Leads
- Datasheet:
-
RDBF31-13.pdf
- Description:
- BRIDGE RECT 1PHASE 100V 3A DBF
- Quantity:
- Payment:
- Shipping:
Inventory:9,330
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Product details
Overview
RDBF31-13 from Diodes Incorporated is a 100 V peak repetitive reverse voltage, 3.0 A average rectified output current, surface-mount fast bridge rectifier in DBF package, featuring 1.3 V max forward voltage at 2.5 A and 150 ns reverse recovery time, used for AC–DC full-wave rectification in LED lighting power supplies and compact adapters.
For engineers reviewing the RDBF31-13 datasheet, RDBF31-13 pinout, RDBF31-13 application, or RDBF31-13 equivalent, key selection criteria include VRRM rating, thermal resistance (RθJA = 15 °C/W), surge capability (100 A IFSM), low leakage (5 µA @ 25°C), and RoHS-compliant lead-free plating for SMT manufacturing.
Technical Context
The RDBF31-13 integrates four fast-switching silicon diodes in a single-phase bridge configuration with glass-passivated die construction. Its 150 ns reverse recovery time and 45 pF typical junction capacitance per element support high-frequency switching in offline SMPS designs up to several hundred kHz.
Designed for surface-mount assembly on FR-4 PCBs with minimal copper area, it delivers 3.0 A average output current at TC = +120°C with thermal resistance of 5 °C/W (junction-to-case) and 15 °C/W (junction-to-ambient), enabling compact thermal management in space-constrained adapters and LED drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Withstands 100 V peak reverse voltage without breakdown; suitable for 70 V RMS input lines. |
| IO (at TC = +120°C) | 3.0 A - Continuous DC output current capability under thermally constrained board-mount conditions. |
| VFM (at IF = 2.5 A) | 1.3 V - Low conduction loss per diode leg, reducing power dissipation in high-current paths. |
| tRR | 150 ns - Fast recovery minimizes switching losses and EMI in high-frequency rectification stages. |
| IFSM (8.3 ms) | 100 A - Handles cold-start surges and line transients without failure in consumer-grade power supplies. |
| IR (at VR = 100 V, TA = +25°C) | 5 µA - Ultra-low leakage preserves efficiency in standby and light-load operation. |
| RθJA | 15 °C/W - Enables thermal design on standard 1.3 mm² solder pads without heatsinking in ≤3 W applications. |
Pinout & Package
Package: DBF - Miniature molded plastic surface-mount package (6.45–6.85 mm × 8.50–8.90 mm × 1.30–1.50 mm), UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC terminal 1 | One AC input node of internal bridge; connects to live/phase side of transformer secondary. |
| AC2 | Input AC terminal 2 | Second AC input node; completes full-wave bridge input path with AC1. |
| + (Anode) | Positive DC output | Common anode connection of two diodes; delivers rectified positive rail to load/filter capacitor. |
| – (Cathode) | Negative DC output | Common cathode connection of two diodes; returns to transformer center tap or ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and humidity resistance in unsealed consumer environments. |
| Fast recovery (150 ns) | Reduces reverse recovery charge (Qrr), lowering switching losses and improving efficiency above 50 kHz. |
| 100 A surge rating | Supports robust inrush current handling during cold start without derating or external fusing. |
| Lead-free, halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" compliance (<900 ppm Br/Cl, <1000 ppm Sb). |
| Miniature DBF footprint | Occupies ~54 mm² board area-40% smaller than industry-standard GBU packages-enabling ultra-compact adapter layouts. |
Applications
| LED Lighting Power Supply | USB-C Wall Adapter |
|---|---|
Use Scenario: Rectifying 120/230 VAC mains to DC bus in non-isolated LED driver IC front-end stages. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC input to pulsating DC prior to bulk capacitor and buck/buck-boost regulation. Use Value: 1.3 V VFM and 150 ns tRR minimize conduction and switching losses, sustaining >88% efficiency at 25–100% load in Class II LED drivers. | Use Scenario: Input rectification in compact 30 W USB-C PD adapters with high-density PCB layout constraints. IC Role / Device Role / Timing Role: Primary-side AC–DC conversion stage feeding active clamp flyback or GaN-based resonant topology. Use Value: DBF package enables direct placement adjacent to transformer and primary MOSFET, reducing loop inductance and EMI without sacrificing 3.0 A IO rating. |
| Smart Home Appliance PSU | Office Equipment Standby Converter |
Use Scenario: Mains rectification in low-cost, thermally limited auxiliary power supplies for Wi-Fi modules and sensors. IC Role / Device Role / Timing Role: Bridge rectifier supplying 12 V/5 V isolated or non-isolated standby rails in HVAC controllers and smart plugs. Use Value: 5 µA IR at 25°C ensures sub-10 mW no-load consumption, meeting Energy Star Level VI and EU CoC v5 standby requirements. | Use Scenario: Input-stage rectification in multi-output office equipment PSUs powering logic, display, and motor control subsystems. IC Role / Device Role / Timing Role: High-reliability bridge delivering stable DC bus to downstream PWM controllers and LDOs. Use Value: Glass passivation and 150°C max operating temperature ensure 10+ year field life in continuously powered printers and scanners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSB30TM | Successor part: same DBF package, 100 V VRRM, but improved tRR (100 ns) and lower VFM (1.1 V @ 2.5 A). | Direct replacement with enhanced efficiency; recommended for new designs requiring higher reliability and lower losses. | Select MSB30TM for production ramp or redesign where supply continuity and performance uplift are critical. |
| GBU4K | Through-hole GBU package (22.5 × 18.5 mm); 4 A IO, 100 V VRRM, 1.1 V VFM, but larger footprint and higher RθJA (~25 °C/W). | Suitable only where board space is unconstrained and manual assembly or legacy compatibility is required. | Choose GBU4K only for repair, legacy system maintenance, or prototyping where SMT infrastructure is unavailable. |
Compared with RDBF31-13, MSB30TM offers measurable efficiency gains and lifecycle assurance, while GBU4K trades miniaturization for mechanical robustness and legacy fit-making RDBF31-13 optimal only for existing DBF-based designs nearing EOL transition.
Availability
RDBF31-13 is available at Aetrix Electronics and suitable for LED lighting power supplies, USB-C wall adapters, and smart home appliance PSUs requiring stable component supply during end-of-life transition planning.
Supply support for RDBF31-13 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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The RDBF31-13 belongs to Diodes' DBF-series fast bridge rectifiers, engineered specifically for high-density, cost-sensitive AC–DC conversion in consumer and industrial power supplies where thermal efficiency and SMT manufacturability are prioritized.
FAQ
Is RDBF31-13 still in active production?
No. Diodes Incorporated has officially discontinued RDBF31-13 and marked it obsolete per DS39412 Rev. 4 (February 2025). It remains available through authorized distributors for last-time buy and legacy support, but no new wafer fabrication is scheduled. Customers are advised to migrate to MSB30TM for long-term design continuity.
What is the maximum operating temperature for RDBF31-13?
The RDBF31-13 has a specified operating junction temperature range of –55°C to +150°C. Its 3.0 A average output current rating is guaranteed at TC = +120°C, meaning the case temperature must not exceed +120°C under continuous load. Derating is required above this point per the thermal resistance curves in the datasheet.
Can RDBF31-13 be used in automotive applications?
RDBF31-13 is not AEC-Q200 qualified and lacks PPAP documentation or IATF 16949-certified manufacturing traceability. While its –55°C to +150°C operating range meets some automotive ambient requirements, Diodes explicitly states that automotive use requires contacting their representative for qualified alternatives like the AEC-Q200-compliant MSB30TM-A.
What does the marking "RDBF31" on the device body indicate?
The top-side marking "RDBF31" identifies the device family (RDBF) and voltage grade (31 = 100 V VRRM). It is followed by a three-character date code (e.g., "5A3" = 2025, January, 3rd day). This marking aligns with Diodes' standardized product coding and is verified in the mechanical drawings and marking section of DS39412.
RDBF31-13 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):
- 100 V
- Current - Average Rectified (Io):
- 3 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2.5 A
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DBF
RDBF31-13 FAQ
1.How can I place an order for RDBF31-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for RDBF31-13 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 RDBF31-13 reliable?
The price and inventory of RDBF31-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RDBF31-13 is usually 5 days.
3.What payment methods are accepted for RDBF31-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RDBF31-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RDBF31-13?
RDBF31-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RDBF31-13 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 RDBF31-13?
For technical support, including RDBF31-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RDBF31-13 requirements.
6.How does Aetrix verify that RDBF31-13 is sourced from the original manufacturer or authorized distributors?
All RDBF31-13 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 RDBF31-13 meets industry standards.
7.What is the process for return or replacement of RDBF31-13?
All RDBF31-13 units undergo pre-shipment inspection (PSI). If there is an issue with RDBF31-13, 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 RDBF31-13 part is unused and in its original packaging.
Return procedure for RDBF31-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RDBF31-13 Tags
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