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Diodes Incorporated DF04S-T
- Part No.:
- DF04S-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
DF04S-T.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 1A DF-S
- Quantity:
- Payment:
- Shipping:
Inventory:28,620
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Product details
Overview
DF04S-T from Diodes Incorporated is a 1.0A surface-mount standard recovery bridge rectifier with 400V peak repetitive reverse voltage (VRRM), 1.1V max forward voltage at 1.0A, and 10µA max reverse leakage at 25°C. It features glass-passivated die construction, 50A non-repetitive surge capability, and is qualified for industrial power supplies and AC/DC adapters requiring compact, RoHS-compliant rectification.
For engineers reviewing the DF04S-T datasheet, DF04S-T pinout, DF04S-T application, or DF04S-T equivalent, key selection criteria include its 400V blocking rating, thermal resistance of 40°C/W, surface-mount DF-S package compatibility, and UL recognition under file E364304 for safety-critical designs.
Technical Context
This single-phase, full-wave bridge rectifier integrates four standard recovery diodes in one molded plastic DF-S package. Its internal configuration enables AC-to-DC conversion without external interconnection, supporting resistive or inductive loads at 60Hz with derating required for capacitive loads.
Designed for surface-mount assembly, it delivers stable performance across –55°C to +150°C operating temperature range and exhibits 25pF typical junction capacitance per element at 1MHz/4V reverse bias-critical for EMI-sensitive power front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum peak reverse voltage the device blocks reliably in each diode leg |
| IF(AV) | 1.0 A - Average forward rectified current at TA = +40°C, defining continuous DC output capability |
| VF Max | 1.1 V @ 1.0A - Forward voltage drop per diode element, directly impacting conduction loss and thermal rise |
| IR Max | 10 µA @ 25°C - Reverse leakage current per element, affecting standby power and high-impedance circuit integrity |
| IFSM | 50 A - Non-repetitive surge current tolerance (8.3ms half-sine), enabling robustness against line transients |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance on standard PCB land pattern, guiding heatsinking requirements |
| CT | 25 pF @ 1MHz - Typical junction capacitance per diode, influencing high-frequency noise coupling and switching behavior |
Pinout & Package
Package: DF-S, surface-mount molded plastic case (UL 94V-0), 7.4–7.9 mm length × 6.2–6.5 mm width × 1.0–1.2 mm height, 0.38 g weight, tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC Terminal 1 | One AC input node for full-wave bridge operation; connects to live/phase side of transformer secondary |
| AC2 | Input AC Terminal 2 | Second AC input node; completes AC input path for center-tapped or dual-winding configurations |
| + (Anode Common) | Positive DC Output | Common anode connection of two diodes; delivers rectified positive DC voltage to load/filter capacitor |
| – (Cathode Common) | Negative DC Output / Ground Reference | Common cathode connection of two diodes; serves as return path and system ground reference point |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and moisture resistance in humid or thermally cycling environments |
| UL Recognized Component | Qualified under File E364304, enabling use in end-equipment requiring regulatory safety certification |
| Lead-free & Halogen-free | Meets RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| Surface-mount optimized | DF-S footprint supports automated placement and reflow soldering without lead-forming or through-hole tooling |
| 50A surge rating | Withstands brief overcurrent events such as inrush or lightning-induced surges without failure |
Applications
| AC/DC Power Adapters | Industrial Control Power Supplies |
|---|---|
Use Scenario: Compact wall-mounted adapters converting 100–240V AC mains to low-voltage DC for consumer electronics. IC Role / Device Role / Timing Role: Full-wave bridge rectifier providing unidirectional current flow prior to bulk capacitance and regulation. Use Value: 400V VRRM ensures margin above 240V AC peak (≈340V), while 1.1V VF minimizes conduction loss in space-constrained enclosures. | Use Scenario: DIN-rail mounted 24V DC power supplies powering PLC I/O modules and sensors in factory automation. IC Role / Device Role / Timing Role: Primary rectification stage converting transformer-isolated AC to DC bus before filtering and regulation. Use Value: UL recognition and –55°C to +150°C operating range support compliance and reliability in harsh industrial environments. |
| LED Driver Input Stages | Appliance Power Front-Ends |
Use Scenario: Constant-voltage LED drivers for commercial lighting where EMI and efficiency are tightly constrained. IC Role / Device Role / Timing Role: AC input rectification before PFC and DC-DC stages; operates at line frequency with minimal switching noise. Use Value: 25pF junction capacitance limits high-frequency common-mode noise injection into upstream EMI filters. | Use Scenario: Power supply sections in white goods (refrigerators, washing machines) with variable load profiles and thermal cycling. IC Role / Device Role / Timing Role: Mains rectification in isolated SMPS designs, interfacing with primary-side controllers and transformers. Use Value: 50A IFSM withstands motor startup surges and compressor inrush without degradation over product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K (ON Semiconductor) | Same 400V VRRM and 1.0A IF(AV), but GBU package (larger, through-hole); VF = 1.05V typ | Requires PCB redesign for through-hole mounting; higher thermal mass may improve transient thermal response | Select when legacy through-hole assembly or higher surge margin (60A IFSM) is prioritized over board space |
| MB6S (Vishay) | Same DF-S package, 400V VRRM, but lower IR (5µA max @ 25°C); VF = 1.1V max identical | Lower leakage improves standby efficiency in always-on appliances; identical footprint enables drop-in replacement | Select when ultra-low reverse leakage is critical for energy-efficient standby modes or battery-backed systems |
Compared with GBU4K and MB6S, DF04S-T offers optimal balance of surface-mount compatibility, UL recognition, and industry-standard surge rating-making it preferred for new SMT-based industrial and adapter designs where certification and assembly efficiency are primary concerns.
Availability
DF04S-T is available at Aetrix Electronics and suitable for AC/DC power adapters, industrial control power supplies, and LED driver input stages requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for DF04S-T 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-reliability power management, signal integrity, and protection solutions.
The DF-S bridge rectifier series targets cost-sensitive, high-volume power conversion applications where surface-mount efficiency, safety certification, and thermal robustness are essential design requirements.
FAQ
What is the maximum allowable ambient temperature for continuous operation of DF04S-T?
The DF04S-T is rated for continuous operation from –55°C to +150°C junction temperature. At TA = +40°C, it delivers full 1.0A average forward current. Derating begins above +40°C ambient, reaching zero current at approximately +125°C ambient based on its 40°C/W RθJA and thermal limits.
Does DF04S-T require heatsinking in typical 1A applications?
Heatsinking is not required for DF04S-T in standard 1A applications with adequate PCB copper area (≥5.0 mm² per terminal). Its 40°C/W RθJA assumes that layout; adding thermal vias or larger copper pours further reduces junction temperature without discrete heatsinks.
Is DF04S-T qualified for automotive applications?
No-DF04S-T is not AEC-Q101 qualified. While it operates across –55°C to +150°C, Diodes explicitly states that automotive-grade versions require separate qualification (PPAP, IATF 16949 manufacturing, AEC-Q101 testing), and DF04S-T is designated for industrial and commercial use only.
How does the DF-S package differ from GBPC or KBU packages in layout and assembly?
The DF-S package is a compact, single-row surface-mount outline (7.65 × 6.35 × 1.1 mm), unlike through-hole GBPC (square quad) or KBU (insulated base) packages. It uses standard SMT reflow profiles, eliminates lead trimming, and requires no through-holes-reducing assembly cost and improving board density.
DF04S-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 1 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DF-S
DF04S-T FAQ
1.How can I place an order for DF04S-T through Aetrix?
Please submit a Request for Quotation (RFQ) for DF04S-T 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 DF04S-T reliable?
The price and inventory of DF04S-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF04S-T is usually 5 days.
3.What payment methods are accepted for DF04S-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF04S-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF04S-T?
DF04S-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF04S-T 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 DF04S-T?
For technical support, including DF04S-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF04S-T requirements.
6.How does Aetrix verify that DF04S-T is sourced from the original manufacturer or authorized distributors?
All DF04S-T 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 DF04S-T meets industry standards.
7.What is the process for return or replacement of DF04S-T?
All DF04S-T units undergo pre-shipment inspection (PSI). If there is an issue with DF04S-T, 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 DF04S-T part is unused and in its original packaging.
Return procedure for DF04S-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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