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Diodes Incorporated DF1508S-T
- Part No.:
- DF1508S-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-SMD, Gull Wing
- Datasheet:
-
DF1508S-T.pdf
- Description:
- BRIDGE RECT 1P 800V 1.5A DF-S
- Quantity:
- Payment:
- Shipping:
Inventory:6,119
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Product details
Overview
DF1508S-T 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. It features glass-passivated die construction, 50 A non-repetitive surge capability, and UL recognition (E364304) for use in AC/DC power supplies and industrial motor controls.
For engineers reviewing the DF1508S-T datasheet, DF1508S-T pinout, DF1508S-T application, or DF1508S-T equivalent, key selection criteria include its 800 V blocking rating, thermal resistance of 40 °C/W, moisture sensitivity level 1 compliance, and DF-S package suitability for automated SMT assembly in high-reliability power conversion designs.
Technical Context
This device integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling AC-to-DC conversion without external interconnects. Its standard recovery characteristic (typical trr > 500 ns) supports line-frequency operation at 50/60 Hz with resistive or inductive loads.
The DF-S package uses molded plastic (UL 94V-0), tin-plated terminals solderable per MIL-STD-202 Method 208, and supports 1.5 A continuous conduction at +40°C ambient with derating above that temperature per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - Maximum peak reverse voltage the bridge withstands without breakdown; defines usable input AC voltage range (e.g., up to ~565 V RMS). |
| IF(AV) | 1.5 A - Continuous average forward current per output path; determines sustained DC load capability in power supply outputs. |
| VFM | 1.1 V @ 1.5 A - Forward voltage drop per diode element; directly impacts conduction loss (2.2 V total bridge drop at full load). |
| IFSM | 50 A - Non-repetitive surge current rating (8.3 ms half-sine); enables handling of inrush currents in transformer-coupled supplies. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance on standard PCB land; informs heatsinking requirements for thermal design margin. |
| IRM | 10 µA @ 25°C - Peak reverse leakage per element at rated DC blocking voltage; affects standby power loss in low-power standby circuits. |
| CT | 25 pF @ 1 MHz, 4 V - Typical junction capacitance per diode; influences EMI behavior and high-frequency switching noise in rectifier stage. |
Pinout & Package
Package: DF-S, surface-mount molded plastic (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, 0.38 g weight. Terminals are tin-plated, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ~AC1 | AC Input Terminal 1 | One leg of AC input; connects to transformer secondary or AC line; marked with polarity symbol on case. |
| ~AC2 | AC Input Terminal 2 | Second leg of AC input; completes full-wave bridge input path; unmarked side of case marking. |
| +DC | Positive DC Output | Anode of output diodes; delivers rectified positive voltage to filter capacitor or regulator input. |
| -DC | Negative DC Output / Common | Cathode of output diodes; serves as circuit ground reference and return path for DC load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability under humidity and thermal cycling by preventing surface contamination-induced leakage. |
| 50 A surge rating | Supports cold-start inrush into large bulk capacitors without failure, eliminating need for external NTC thermistors in many designs. |
| UL Recognized Component | Meets safety requirements per File E364304, reducing certification effort for end-equipment in North American markets. |
| Moisture Sensitivity Level 1 | Enables unlimited floor life before reflow; no baking required prior to SMT assembly, lowering manufacturing cost and complexity. |
| Lead-free & RoHS compliant | Fulfills EU RoHS 3 (2015/863/EU) and automotive change control readiness per Diodes' quality definitions. |
Applications
| Industrial AC/DC Power Supplies | Appliance Motor Control Boards |
|---|---|
Use Scenario: Rectifying 230 VAC mains input in DIN-rail mounted power supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Full-wave bridge rectifier converting AC input to unregulated DC bus for downstream buck converter regulation. Use Value: 800 V VRRM ensures margin against line surges; 40 °C/W RθJA allows operation without heatsink at 1.2 A load in enclosed enclosures. | Use Scenario: Providing DC bus for universal motor driver in washing machine control boards. IC Role / Device Role / Timing Role: Bridge rectifier feeding capacitor-input filter and triac-triggered phase-control circuitry. Use Value: 50 A IFSM handles repeated motor startup surges; glass passivation prevents degradation in humid laundry environments. |
| LED Driver Secondary Side | Office Equipment Standby Power |
Use Scenario: Secondary-side rectification in isolated flyback LED drivers for commercial downlights. IC Role / Device Role / Timing Role: Output rectifier delivering low-ripple DC to constant-current LED string driver IC. Use Value: 1.1 V VFM minimizes conduction loss at 1.5 A, improving overall driver efficiency and thermal performance. | Use Scenario: Auxiliary winding rectification in SMPS for PC motherboard standby (5 VSB) rail. IC Role / Device Role / Timing Role: Low-leakage bridge supplying regulated 5 V to real-time clock and wake-on-LAN circuitry. Use Value: 10 µA IRM at 25°C reduces no-load power consumption, aiding Energy Star compliance. |
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 additional thermal relief; less suitable for space-constrained designs. | Select when legacy GBU footprint compatibility is required or when higher surge margin (60 A IFSM) is prioritized over size. |
| MB10F (Vishay) | Lower 1000 V VRRM but only 1.0 A IF(AV); smaller MB package (RθJA = 45 °C/W). | Insufficient current rating for 1.5 A continuous loads; risk of thermal runaway under full load. | Not recommended for direct replacement; consider only if load current is confirmed ≤1.0 A and 1000 V margin is critical. |
Compared with GBU8K and MB10F, DF1508S-T offers optimal balance of compact DF-S footprint, 40 °C/W thermal performance, and verified 1.5 A/800 V operation-making it preferred for new SMT designs where board space and thermal efficiency are constrained.
Availability
DF1508S-T is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, appliance motor control boards, LED driver secondary sides, and office equipment standby power requiring stable component supply across multi-year production cycles.
Supply support for DF1508S-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The DF-series bridge rectifiers are part of Diodes' power discrete portfolio, engineered specifically for high-volume, cost-sensitive AC/DC conversion in industrial, consumer, and computing applications where reliability, SMT compatibility, and regulatory compliance are essential.
FAQ
What is the maximum operating temperature for DF1508S-T?
The DF1508S-T has an operating junction temperature range of –55 °C to +150 °C. Its safe continuous operation at 1.5 A requires ambient temperatures ≤+40 °C on standard PCB land, with linear derating to zero current at +125 °C ambient per the published derating curve (Figure 1).
Is DF1508S-T suitable for capacitive-input filter applications?
No-capacitive-input filters require derating the average forward current by 20% per the datasheet. At 1.5 A rated IF(AV), this limits continuous use to 1.2 A in such configurations to prevent overheating and premature failure due to increased peak current stress.
Does DF1508S-T meet AEC-Q200 for automotive use?
DF1508S-T is not AEC-Q200 qualified. While Diodes offers automotive-grade variants (e.g., DF1508S-AQ), this standard version lacks PPAP documentation, IATF 16949 manufacturing evidence, and extended temperature validation required for automotive applications.
How is polarity marked on the DF1508S-T package?
Polarity is marked on the top surface: the cathode bar (–DC terminal) is indicated by a molded notch or beveled edge adjacent to the +DC terminal; the ~AC1 pin aligns with the marking symbol (e.g., "|" or "+" near one corner), while ~AC2 is diagonally opposite.
DF1508S-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):
- 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-T FAQ
1.How can I place an order for DF1508S-T through Aetrix?
Please submit a Request for Quotation (RFQ) for DF1508S-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 DF1508S-T reliable?
The price and inventory of DF1508S-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF1508S-T is usually 5 days.
3.What payment methods are accepted for DF1508S-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF1508S-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF1508S-T?
DF1508S-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF1508S-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 DF1508S-T?
For technical support, including DF1508S-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF1508S-T requirements.
6.How does Aetrix verify that DF1508S-T is sourced from the original manufacturer or authorized distributors?
All DF1508S-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 DF1508S-T meets industry standards.
7.What is the process for return or replacement of DF1508S-T?
All DF1508S-T units undergo pre-shipment inspection (PSI). If there is an issue with DF1508S-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 DF1508S-T part is unused and in its original packaging.
Return procedure for DF1508S-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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