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Diodes Incorporated DF1508S
- Part No.:
- DF1508S
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
DF1508S.pdf
- Description:
- BRIDGE RECT 1P 800V 1.5A DF-S
- Quantity:
- Payment:
- Shipping:
Inventory:42
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Product details
Overview
DF1508S from Diodes Incorporated is a surface-mount standard recovery bridge rectifier with 800 V peak repetitive reverse voltage, 1.5 A average forward current, and 1.1 V maximum forward voltage per element at 1.5 A. It features glass-passivated die construction, 50 A non-repetitive surge capability, and UL recognition (E364304), designed for AC/DC power conversion in industrial power supplies and LED drivers.
For engineers reviewing the DF1508S datasheet, DF1508S pinout, DF1508S application, or DF1508S equivalent, key selection criteria include reverse voltage rating (800 V), thermal resistance (40 °C/W), surge robustness (50 A @ 8.3 ms), and DF-S package compatibility with automated SMT assembly.
Technical Context
This single-phase, full-wave bridge rectifier integrates four silicon diodes in a monolithic DF-S package. It operates across -55 °C to +150 °C, with junction-to-ambient thermal resistance of 40 °C/W on a 5.0 mm² copper pad, and exhibits 25 pF typical capacitance per element at 1 MHz and 4 V reverse bias.
The device supports resistive or inductive loads at 60 Hz; capacitive loads require 20% current derating. Its 10.4 A²s I²t fusing rating defines short-circuit withstand capability, while 10 µA peak reverse current at 25 °C ensures low leakage in high-impedance hold-up stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Withstands 800 V repetitive reverse voltage without breakdown, suitable for 400 VAC input lines after rectification. |
| IF(AV) | 1.5 A @ TA = +40°C - Continuous DC output current capability under defined ambient thermal conditions. |
| VF Max | 1.1 V @ IF = 1.5 A - Forward voltage drop per diode element, directly impacting conduction loss and thermal design. |
| IFSM | 50 A @ 8.3 ms - Peak surge current handling for line transients or cold-start inrush, critical for reliability in unregulated supplies. |
| IRM | 10 µA @ 25°C - Low reverse leakage ensures minimal standby power loss and stable DC bus hold-up. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance measured on standard PCB land pattern, guides heatsinking requirements. |
| CT | 25 pF @ 1 MHz, 4 V - Capacitance per element affects high-frequency noise coupling and EMI filter design. |
Pinout & Package
Package: DF-S - Surface-mount molded plastic package (UL 94V-0), 7.4–7.9 mm × 6.2–6.5 mm footprint, 8.13–8.51 mm length, 1.0–1.2 mm height, with tin-solderable leads and polarity marking on case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One AC input node of full-wave bridge; connects to transformer secondary or AC line input. |
| ~AC2 | AC Input Terminal 2 | Second AC input node; completes AC path for full-wave rectification. |
| +DC | Positive DC Output | Anode of output leg; delivers rectified positive voltage to bulk capacitor or regulator input. |
| -DC | Negative DC Output / Common | Cathode of output leg; serves as circuit ground reference and return path for DC load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability and moisture resistance in humid or thermally cycled environments. |
| 50 A surge rating | Supports repeated line surges and inrush events without degradation, reducing need for external NTC or fusing. |
| UL Recognized (E364304) | Meets safety certification requirements for end-equipment approval without additional system-level testing. |
| RoHS-compliant, lead-free finish | Enables compliance with environmental regulations and compatibility with Pb-free reflow profiles (J-STD-020 Level 1). |
Applications
| Industrial Power Supplies | LED Driver Front-End |
|---|---|
Use Scenario: AC/DC conversion stage in DIN-rail mounted 24 V/48 V power supplies for PLCs and sensors. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting 100–277 VAC mains to unregulated DC bus. Use Value: 800 V VRRM provides 2× margin over 277 VAC peak (392 V), ensuring robust operation during brownouts and surges. |
Use Scenario: Input rectification in constant-current LED drivers for street lighting and commercial fixtures. IC Role / Device Role / Timing Role: Primary-side AC-to-DC conversion feeding PFC controller and isolated flyback stage. Use Value: Low 1.1 V VF minimizes conduction loss at 1.5 A, improving efficiency and reducing heatsink size in enclosed luminaires. |
| Appliance Control Boards | AC Motor Drive Auxiliary Supply |
Use Scenario: Mains-powered control logic in washing machines, HVAC controllers, and smart home hubs. IC Role / Device Role / Timing Role: Rectification for low-power auxiliary supply powering MCU, relays, and communication ICs. Use Value: DF-S package enables compact layout and automated placement, supporting high-volume SMT manufacturing. |
Use Scenario: Auxiliary DC supply generation in variable-frequency drives for fans and pumps. IC Role / Device Role / Timing Role: Isolated auxiliary rail rectifier fed from control transformer secondary. Use Value: 50 A IFSM withstands motor startup transients without failure, eliminating need for redundant rectifiers. |
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 800 V VRRM and 1.5 A IF(AV), but GBU package (larger footprint, higher RθJA = 50 °C/W). | Requires larger PCB area and more thermal relief; less suitable for space-constrained designs. | Select when legacy GBU footprint compatibility is required or when higher surge margin (60 A) is prioritized. |
| MB10F (Vishay) | Lower 1000 V VRRM but only 1.0 A IF(AV); same DF-S package and 1.1 V VF. | Not suitable for continuous 1.5 A loads; limited to lower-power auxiliary rails. | Choose only for cost-sensitive, lower-current applications where 800 V rating is excessive. |
Compared with GBU8K and MB10F, DF1508S uniquely balances 800 V rating, 1.5 A capacity, DF-S compactness, and 40 °C/W thermal performance-making it optimal for modern, density-constrained industrial and lighting power supplies.
Availability
DF1508S is available at Aetrix Electronics and suitable for industrial power supplies, LED driver front-ends, and appliance control boards requiring stable component supply and RoHS-compliant sourcing.
Supply support for DF1508S 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-series bridge rectifiers are engineered for surface-mount AC/DC conversion in cost-sensitive, high-volume industrial and consumer power systems, emphasizing thermal efficiency, surge resilience, and regulatory compliance.
FAQ
What is the maximum operating temperature for DF1508S?
The DF1508S has an operating junction temperature range of -55 °C to +150 °C. Its storage temperature matches this range. Thermal design must ensure junction temperature stays within limits using the specified RθJA of 40 °C/W and appropriate PCB copper area.
Is DF1508S qualified for automotive applications?
No-DF1508S is not AEC-Q101 qualified. While Diodes offers automotive-grade variants in other series, this part is intended for industrial, commercial, and consumer applications. Automotive use requires explicit AEC qualification and PPAP documentation.
Can DF1508S replace DF1506S in a design?
Yes-DF1508S is a direct upgrade from DF1506S (600 V) with higher VRRM (800 V), identical IF(AV), VF, package, and pinout. No layout or thermal changes are needed, and it improves surge margin for 277 VAC systems.
What is the recommended PCB pad layout for DF-S package?
Diodes specifies a suggested pad layout with 5.0 mm² (0.03 mm thick) copper land areas per terminal to achieve the rated RθJA of 40 °C/W. Exact dimensions are published in Diodes' package outline document DS17002, accessible via their website.
DF1508S Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-SMD, Gull Wing
- Packaging:
- Tube
- 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 @ 1.5 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 800 V
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DF-S
DF1508S FAQ
1.How can I place an order for DF1508S through Aetrix?
Please submit a Request for Quotation (RFQ) for DF1508S 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 DF1508S reliable?
The price and inventory of DF1508S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF1508S is usually 5 days.
3.What payment methods are accepted for DF1508S?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF1508S transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF1508S?
DF1508S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF1508S 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 DF1508S?
For technical support, including DF1508S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF1508S requirements.
6.How does Aetrix verify that DF1508S is sourced from the original manufacturer or authorized distributors?
All DF1508S 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 DF1508S meets industry standards.
7.What is the process for return or replacement of DF1508S?
All DF1508S units undergo pre-shipment inspection (PSI). If there is an issue with DF1508S, 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 DF1508S part is unused and in its original packaging.
Return procedure for DF1508S:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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