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onsemi DF08S
- Part No.:
- DF08S
- Manufacturer:
- onsemi
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
DF08S.pdf
- Description:
- BRIDGE RECT 1P 800V 1.5A 4-SDIP
- Quantity:
- Payment:
- Shipping:
Inventory:8,688
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Product details
Overview
DF08S from Diodes Incorporated is a 1.0A surface-mount standard recovery bridge rectifier with 800V 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 UL recognition (E364304), used in AC/DC power supplies for industrial control systems.
For engineers reviewing the DF08S datasheet, DF08S pinout, DF08S application, or DF08S equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (40°C/W junction-to-ambient), IFSM surge margin, and DF-S package compatibility with automated SMT assembly.
Technical Context
The DF08S integrates four silicon diodes in a single-phase bridge configuration with standard recovery characteristics (typical trr > 500ns), optimized for line-frequency rectification rather than high-frequency switching. Its thermal design assumes 5.0mm² copper land pads per terminal, and it requires 20% current derating under capacitive load conditions.
Electrical behavior is defined across -55°C to +150°C operating range, with reverse leakage rising to 500µA at 125°C and total capacitance of 25pF per element measured at 1MHz/4V reverse bias - parameters critical for EMI filtering and snubberless design in offline SMPS front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum peak reverse voltage sustainable without breakdown; defines minimum input AC voltage rating for 230VAC mains applications. |
| IF(AV) | 1.0 A @ TA = +40°C - Average forward current rating; requires thermal derating above ambient 40°C per Fig.1. |
| VF Max | 1.1 V @ IF = 1.0A - Forward voltage drop per diode element; determines conduction loss (1.1W total bridge loss at full load). |
| IFSM | 50 A - Non-repetitive surge current for 8.3ms half-sine; supports inrush current handling in transformer-coupled supplies. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance on standard PCB; sets minimum copper area needed for thermal compliance. |
| IRM | 10 µA @ 25°C - Peak reverse leakage per element; impacts standby power in low-power adapters. |
| CT | 25 pF @ 1MHz/4V - Total capacitance per diode; influences high-frequency noise coupling and snubber design. |
Pinout & Package
Package: DF-S molded plastic package (UL 94V-0), 7.4–7.9mm × 6.2–6.5mm footprint, 8.13–8.51mm length, 0.22–0.30mm lead thickness, tin-finished terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One AC input node of internal bridge; connects to live/neutral side of transformer secondary or mains input. |
| ~AC2 | AC Input Terminal 2 | Second AC input node; completes full-wave rectification path with ~AC1. |
| +DC | Positive DC Output | Anode of output diodes; delivers rectified positive rail to bulk capacitor or regulator input. |
| -DC | Negative DC Output / Ground Reference | Cathode of output diodes; serves as return path and system ground reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enables stable long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments. |
| 50A surge rating | Withstands cold-start inrush into large bulk capacitors without degradation; eliminates need for external NTC thermistors in cost-sensitive designs. |
| UL Recognized (E364304) | Satisfies safety certification requirements for end-equipment without requiring additional isolation testing of rectifier subassembly. |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive green standards; enables use in automotive infotainment power supplies. |
Applications
| Industrial AC/DC Power Supplies | LED Driver Input Stage |
|---|---|
Use Scenario: Rectifying 115/230VAC input in DIN-rail mounted PLC power modules. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC line to unregulated DC bus prior to buck converter stage. Use Value: 800V VRRM provides 2× safety margin over 230VAC RMS, enabling robust operation during line surges up to 4kV. | Use Scenario: Input rectification in constant-current LED drivers for street lighting. IC Role / Device Role / Timing Role: Primary-side bridge rectifier feeding bulk capacitor and PFC controller. Use Value: Low 1.1V VF minimizes conduction loss at 1A average current, improving driver efficiency by ~0.8% over higher-VF alternatives. |
| Appliance Control Boards | IoT Gateway Power Input |
Use Scenario: Mains-powered smart home hubs with integrated relay and sensor interfaces. IC Role / Device Role / Timing Role: Isolated AC input rectification feeding linear regulator for microcontroller supply rail. Use Value: DF-S package allows compact layout with minimal creepage distance; UL recognition simplifies regional safety approvals. | Use Scenario: Dual-input (mains + PoE) gateways requiring fail-safe AC rectification path. IC Role / Device Role / Timing Role: Standby rectifier maintaining real-time clock and wake-up circuitry during main power loss. Use Value: 10µA IR at 25°C ensures <10µW standby dissipation, extending battery backup runtime by >12 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU8K (ON Semiconductor) | Same 800V VRRM and 1.0A rating, but GBU package (larger footprint, 10.5mm × 14.2mm) and higher VF (1.2V). | Requires PCB redesign due to larger outline; better suited for through-hole prototyping or high-temperature environments (>85°C ambient). | Select when mechanical robustness or legacy through-hole compatibility outweighs SMT density requirements. |
| MB10F (Vishay) | Smaller MB package (7.0mm × 5.2mm), same 800V/1.0A, but lower IFSM (30A) and higher RθJA (45°C/W). | Limited surge margin in high-inrush applications; requires enhanced thermal relief on PCB for sustained 1A operation. | Choose for space-constrained consumer electronics where surge events are infrequent and thermal mass is limited. |
Compared with GBU8K and MB10F, the DF08S offers optimal balance of SMT footprint, 50A surge headroom, and 40°C/W thermal performance - making it preferred for industrial-grade AC/DC converters requiring both miniaturization and reliability under transient stress.
Availability
DF08S is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input stages, and appliance control boards requiring stable component supply and long-lifecycle support.
Supply support for DF08S 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 DF-S bridge rectifier product line targets cost-effective, high-reliability AC/DC conversion in industrial, appliance, and infrastructure applications - emphasizing UL recognition, surge robustness, and RoHS-compliant packaging.
FAQ
What is the maximum allowable ambient temperature for continuous 1.0A operation?
The DF08S is rated for 1.0A average forward current at TA = +40°C. Above this, current must be linearly derated per Fig.1 in the datasheet: at +80°C ambient, maximum IO drops to 0.5A. This reflects its 40°C/W thermal resistance and 150°C maximum junction temperature.
Can DF08S be used in place of DF06S in an existing design?
Yes - DF08S shares identical DF-S package, pinout, and thermal profile with DF06S (600V), differing only in VRRM (800V vs. 600V) and slightly higher IR (10µA vs. 5µA at 25°C). No layout or thermal changes are required, and the higher voltage rating improves surge margin in 230VAC applications.
Is DF08S qualified for automotive applications?
No - DF08S is not AEC-Q101 qualified. While it meets RoHS and halogen-free requirements, Diodes specifies that automotive-grade variants require explicit PPAP documentation and IATF 16949 manufacturing - available only under separate part numbers (e.g., DF08SAQ) with added qualification testing.
How does the DF-S package compare to GBPC or KBU packages in terms of PCB assembly?
The DF-S package uses gull-wing leads compatible with standard reflow profiles (peak 245°C), unlike GBPC/KBU's through-hole or isolated-tab designs. Its 0.22–0.30mm lead thickness and tin finish ensure reliable solder joint formation without tombstoning, and its 7.4mm × 6.2mm footprint enables tighter board spacing than legacy bridge packages.
DF08S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 800 V
- Current - Average Rectified (Io):
- 1.5 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 800 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-SDIP
DF08S FAQ
1.How can I place an order for DF08S through Aetrix?
Please submit a Request for Quotation (RFQ) for DF08S 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 DF08S reliable?
The price and inventory of DF08S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF08S is usually 5 days.
3.What payment methods are accepted for DF08S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF08S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF08S?
DF08S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF08S 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 DF08S?
For technical support, including DF08S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF08S requirements.
6.How does Aetrix verify that DF08S is sourced from the original manufacturer or authorized distributors?
All DF08S 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 DF08S meets industry standards.
7.What is the process for return or replacement of DF08S?
All DF08S units undergo pre-shipment inspection (PSI). If there is an issue with DF08S, 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 DF08S part is unused and in its original packaging.
Return procedure for DF08S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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