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Diodes Incorporated DF08M
- Part No.:
- DF08M
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-EDIP (0.300", 7.62mm)
- Datasheet:
-
DF08M.pdf
- Description:
- BRIDGE RECT 1PHASE 800V 1A DFM
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
DF08M from Diodes Incorporated is a 1.0A standard recovery bridge rectifier with 800V maximum repetitive peak 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 designed for PCB-mounted AC/DC front-end rectification in industrial power supplies and consumer adapters.
For engineers reviewing the DF08M datasheet, DF08M pinout, DF08M application, or DF08M equivalent, key selection criteria include VRRM margin for line-voltage transients, thermal resistance (40°C/W) for board-level heatsinking, surge rating for inrush handling, and UL recognition (E364304) for safety-compliant designs.
Technical Context
This single-phase full-wave bridge rectifier integrates four silicon diodes in a monolithic DF-M package, enabling compact AC-to-DC conversion without external interconnects. Its standard recovery characteristic (trr not specified but typical for standard recovery bridges >500ns) balances switching loss and EMI in line-frequency applications.
The device operates across –55°C to +150°C junction temperature, with thermal resistance of 40°C/W (junction-to-ambient, on 5.0mm² copper land), and supports solder reflow per MIL-STD-202 Method 208 due to bright tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands peak AC line voltages up to 566V RMS with 1.4× safety margin for transient surges. |
| IO | 1.0 A @ TA = +40°C - Continuous DC output current rating under standard PCB thermal conditions. |
| VF Max | 1.1 V @ IF = 1.0A - Low conduction loss enables <1.1W dissipation per bridge at full load, reducing thermal stress. |
| IFSM | 50 A (8.3 ms half-sine) - Handles cold-start inrush currents in transformer-based power supplies. |
| IR Max | 10 µA @ VR = 800V, 25°C - Ensures minimal standby power loss in off-state high-voltage blocking. |
| RθJA | 40 °C/W - Requires ≥5.0 mm² copper pad per lead for safe operation at full rated current in still air. |
| TJ Range | –55°C to +150°C - Supports deployment in automotive under-hood and industrial ambient environments. |
Pinout & Package
DF08M uses the DF-M molded plastic package (UL 94V-0), measuring 7.4–7.9 mm × 6.2–6.5 mm × 2.4–3.4 mm (L×W×H), with four gull-wing leads spaced 2.54 mm apart. Terminals are bright tin-plated for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One leg of AC input; connects to transformer secondary or AC line via fuse/EMI filter. |
| ~AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path. |
| +DC | Positive DC Output | Anode of internal upper diodes; delivers rectified positive rail to bulk capacitor. |
| –DC | Negative DC Output / Common Return | Cathode of internal lower diodes; serves as circuit ground reference for downstream regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives in humid environments. |
| UL Recognized Component (E364304) | Validates compliance with UL 60747-4 for end-equipment safety certification without additional component-level testing. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with all applicable exemptions; suitable for global commercial and industrial shipments. |
| 50A surge rating (8.3 ms) | Supports direct connection to unregulated transformer secondaries without external NTC or inrush limiters. |
Applications
| Industrial AC/DC Power Supplies | Consumer Wall Adapters |
|---|---|
Use Scenario: Rectifying 115/230V AC mains to DC bus in DIN-rail mounted 24V/48V PSUs. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC input to pulsating DC prior to bulk capacitance and regulation. Use Value: 800V VRRM provides 1.6× margin over 230V AC peak (325V), ensuring robustness against line surges and ringing. |
Use Scenario: Input-stage rectification in compact 5–12V, 1A wall-wart adapters for IoT sensors and peripherals. IC Role / Device Role / Timing Role: Primary-side AC-to-DC conversion feeding linear or buck converter ICs. Use Value: Low 1.1V VF minimizes conduction loss in space-constrained enclosures where thermal dissipation is limited. |
| Appliance Control Boards | LED Driver Input Stages |
Use Scenario: Mains-powered control boards in washing machines, HVAC controllers, and smart home hubs. IC Role / Device Role / Timing Role: Isolated AC input rectification supplying logic rails and relay drivers. Use Value: –55°C to +150°C operating range ensures stable performance during extended high-temperature cycles in enclosed cabinets. |
Use Scenario: Off-line LED drivers for streetlights and commercial fixtures using passive PFC topologies. IC Role / Device Role / Timing Role: Front-end rectification before choke-input or capacitor-input filtering stages. Use Value: 50A IFSM withstands repeated lamp hot-restrike surges without degradation or failure. |
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, 1.05V VF max, but GBU package (larger footprint, higher RθJA = 50°C/W). | Requires larger PCB area and more copper for thermal management; less suitable for ultra-compact layouts. | Select when legacy GBU footprint compatibility is required and board space allows. |
| DB108S (Comchip) | Same DF-M package, 800V VRRM, but 1.2V VF max and 5µA IR - slightly higher conduction loss, lower leakage. | Acceptable for low-power adapters where leakage dominates standby loss, but less efficient at full load. | Prefer for cost-sensitive, low-IO applications where leakage-critical standby mode outweighs conduction loss. |
Compared with GBU8K and DB108S, DF08M offers optimal balance of thermal performance (40°C/W), conduction efficiency (1.1V VF), and compact DF-M footprint - making it preferred for space-constrained, thermally demanding 1A AC/DC converters.
Availability
DF08M is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, consumer wall adapters, and appliance control boards requiring stable component supply and UL-recognized rectification.
Supply support for DF08M 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.
DF08M belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in commercial and industrial power systems where switching speed is secondary to ruggedness and surge tolerance.
FAQ
Is DF08M suitable for use in AEC-Q200 qualified automotive applications?
No - DF08M is not AEC-Q200 qualified. While it operates from –55°C to +150°C, Diodes specifies that automotive-grade variants require explicit PPAP capability, IATF 16949 manufacturing, and AEC-Q200 qualification. Customers needing automotive compliance must contact Diodes directly for qualified alternatives such as the ABS8 series.
What is the recommended PCB layout for thermal management of DF08M?
Each lead should connect to ≥5.0 mm² of 0.03 mm thick copper land (per Diodes Note 5). Avoid narrow traces between pads; use thermal vias under the central body if multilayer boards are used. Maintain ≥1.5 mm clearance from adjacent components to prevent localized heating.
Does DF08M have a specified reverse recovery time (trr)?
No - the DS21201 datasheet does not specify trr. As a standard recovery bridge, its recovery is intentionally slower (>500 ns typical) to minimize switching noise and EMI in 50/60 Hz applications, unlike fast- or ultrafast-recovery bridges optimized for SMPS.
Can DF08M replace DF06M or DF10M in an existing design?
Yes, mechanically - all share identical DF-M package and pinout. Electrically, DF08M (800V) sits between DF06M (600V) and DF10M (1000V); substitution is viable if system peak reverse voltage stays ≤800V. Derate VRRM by ≥20% for reliability in high-transient environments.
DF08M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-EDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 800 V
- Current - Average Rectified (Io):
- 1 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 800 V
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DFM
DF08M FAQ
1.How can I place an order for DF08M through Aetrix?
Please submit a Request for Quotation (RFQ) for DF08M 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 DF08M reliable?
The price and inventory of DF08M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF08M is usually 5 days.
3.What payment methods are accepted for DF08M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF08M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF08M?
DF08M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF08M 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 DF08M?
For technical support, including DF08M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF08M requirements.
6.How does Aetrix verify that DF08M is sourced from the original manufacturer or authorized distributors?
All DF08M 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 DF08M meets industry standards.
7.What is the process for return or replacement of DF08M?
All DF08M units undergo pre-shipment inspection (PSI). If there is an issue with DF08M, 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 DF08M part is unused and in its original packaging.
Return procedure for DF08M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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