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Diodes Incorporated SDT5A100SAF-13
- Part No.:
- SDT5A100SAF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SDT5A100SAF-13.pdf
- Description:
- DIODE SCHOTTKY 100V 5A SMAF
- Quantity:
- Payment:
- Shipping:
Inventory:3,614
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Product details
Overview
SDT5A100SAF-13 from Diodes Incorporated is a 100 V, 5 A trench Schottky rectifier in SMAF package, featuring 0.66 V max forward voltage at 5 A and 50 µA max reverse leakage at 100 V/25°C. It delivers soft fast switching, high-temperature reverse leakage stability, and is optimized for DC-DC converter output rectification and AC-DC adapter freewheeling.
For engineers reviewing the SDT5A100SAF-13 datasheet, SDT5A100SAF-13 pinout, SDT5A100SAF-13 application, or SDT5A100SAF-13 equivalent, key selection criteria include low VF trade-off against leakage at elevated temperature, thermal resistance (RθJA = 35°C/W with heatsink), and SMAF package compatibility with high-density board layouts in power supply designs.
Technical Context
This Schottky rectifier uses trench MOS structure to achieve lower forward voltage than planar Schottky diodes while maintaining competitive leakage performance. Its junction-to-case thermal resistance of 28°C/W enables efficient heat transfer to PCB copper or external heatsinks.
The device exhibits stable reverse leakage up to 150°C (15 µA at 100 V/125°C, 100 µA at 100 V/150°C per Figure 3), making it suitable for thermally constrained industrial and automotive auxiliary power supplies where ambient temperatures exceed 85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking capability in 48 V–72 V bus applications. |
| IO(AV) | 5 A - Continuous average forward current at TA = 25°C on FR-4; derates to ~2.5 A at 100°C ambient (Fig.5). |
| VF(max) | 0.66 V @ 5 A, 25°C - Low conduction loss improves efficiency in 12 V/5 A output stages (e.g., PoE PSE, USB PD adapters). |
| IR(max) | 50 µA @ 100 V, 25°C - Tight leakage spec ensures minimal standby power loss in always-on systems. |
| RθJA | 35 °C/W - With 50×50×23 mm Al heatsink; enables 2.8 W dissipation at 70°C ΔT (P = IO × VF ≈ 3.3 W max at 5 A). |
| IFSM | 80 A - Non-repetitive surge rating supports inrush current handling during cold start in SMPS. |
| Package | SMAF - Surface-mount, compact 2.95×4.60 mm outline; compatible with standard reflow profiles and automated placement. |
Pinout & Package
Package: SMAF (Surface-Mount Small Outline Diode, cathode-banded). Molded plastic body, matte tin annealed terminals, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to input/source side (e.g., switch node in buck converter); requires low-inductance trace routing. |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output/load side; cathode band marks this terminal for correct orientation during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Enables 0.66 V VF at 5 A - reduces conduction loss by ~15% vs. comparable planar Schottky diodes. |
| High-temperature IR stability | 15 µA @ 100 V/125°C - maintains <1 mW standby loss in 12 V hold-up circuits operating at 105°C ambient. |
| Soft, fast switching | Negligible reverse recovery charge (Qrr ≈ 0) - eliminates switching spikes and EMI in high-frequency (≥300 kHz) DC-DC converters. |
| RoHS 3 & "Green" compliant | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets automotive and industrial environmental compliance requirements without sacrificing thermal performance. |
Applications
| DC-DC Converter Output Rectification | AC-DC Adapter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 12 V/5 A isolated flyback or forward converter. IC Role / Device Role / Timing Role: Uncontrolled rectifier providing low-loss path for inductor current during low-side switch off-time. Use Value: 0.66 V VF reduces conduction loss to ~3.3 W (vs. ~4.5 W for 0.9 V diode), improving full-load efficiency by 1.2–1.8%. | Use Scenario: Freewheel path in 19 V/3.42 A laptop adapter secondary winding. IC Role / Device Role / Timing Role: Blocking diode clamping transformer leakage inductance energy during primary switch turn-off. Use Value: Soft recovery eliminates voltage overshoot >25 V, reducing snubber losses and enabling smaller Y-capacitors. |
| Industrial 24 V Power Supply Hold-up | Automotive Auxiliary Power Module |
Use Scenario: Input rectification in 24 V/2 A DIN-rail power supply with 100 ms ride-through requirement. IC Role / Device Role / Timing Role: Main AC input bridge leg component handling 5 A RMS under continuous load. Use Value: 50 µA IR at 25°C and 100 µA at 150°C ensure <0.1 mW standby dissipation across -40°C to +85°C operating range. | Use Scenario: 12 V battery-fed infotainment system DC-DC pre-regulator input stage. IC Role / Device Role / Timing Role: Reverse polarity protection and load dump clamping diode in 12 V rail conditioning circuit. Use Value: RθJC = 28°C/W allows direct thermal coupling to metal chassis, sustaining 4 A continuous at 105°C case temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS510H-13 | 100 V, 5 A, VF = 0.75 V max @ 5 A; higher VF, same SMAF package. | Higher conduction loss limits use in high-efficiency (>92%) 12 V outputs. | Select when cost sensitivity outweighs 0.09 V VF penalty and thermal margin is ample. |
| SB5100-TB | 100 V, 5 A, VF = 0.85 V max @ 5 A; DO-214AA package, larger footprint. | DO-214AA requires 3.5×7.0 mm board area vs. SMAF's 2.95×4.60 mm - unsuitable for ultra-dense layouts. | Choose only if legacy DO-214AA footprint must be retained or manual soldering is required. |
Compared with SS510H-13 and SB5100-TB, SDT5A100SAF-13 offers the lowest VF in SMAF form factor, enabling higher power density and better thermal performance in space-constrained 5 A rectification, while maintaining identical mounting and reflow compatibility.
Availability
SDT5A100SAF-13 is available at Aetrix Electronics and suitable for DC-DC converters, AC-DC adapters, and industrial 24 V power supplies requiring stable component supply, RoHS 3 compliance, and high-temperature reliability.
Supply support for SDT5A100SAF-13 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-efficiency power management and signal integrity solutions for industrial, computing, and automotive markets.
The SDT5A100SAF belongs to Diodes' Trench Schottky Rectifier product line, engineered specifically for high-current, low-VF operation in compact surface-mount packages targeting next-generation power supplies and adapters.
FAQ
What is the maximum junction temperature and how does it affect derating?
The SDT5A100SAF-13 has an operating junction temperature range of –55°C to +150°C. At 150°C TJ, its leakage current rises to 100 µA (per Fig.3), but average forward current must be derated to ~1.8 A (Fig.5). For reliable 5 A operation, keep TJ ≤ 110°C using heatsinking or airflow-achievable with RθJA = 35°C/W and 70°C ΔT.
Is SDT5A100SAF-13 qualified for automotive applications?
No-SDT5A100SAF-13 is not AEC-Q101 qualified. Diodes offers automotive-grade variants (e.g., SDT5A100SFA-13) with PPAP documentation and IATF 16949 manufacturing, but this part is intended for industrial and commercial power supplies. Use only in automotive after independent qualification and failure mode analysis.
How does the SMAF package compare thermally to SMA or SMB?
SMAF has a smaller footprint (2.95×4.60 mm) than SMA (4.5×2.7 mm) and SMB (4.6×3.6 mm), but its RθJA is 60°C/W on FR-4 (vs. ~50°C/W for SMA). With heatsink, RθJA drops to 35°C/W-matching SMB performance while saving 30% board area. Thermal pad layout per Diodes' recommended footprint is critical.
Can SDT5A100SAF-13 replace a 6 A Schottky in existing designs?
Not directly-its rated IO is 5 A (not 6 A). At 6 A, VF rises to ~0.71 V and power dissipation exceeds 4.2 W, risking thermal runaway without aggressive cooling. Derate to 4.5 A continuous with ≥2 oz copper and 200 LFM airflow, or select SDT6A100SAF-13 (6 A version) for true 6 A operation.
SDT5A100SAF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 660 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 50 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
SDT5A100SAF-13 FAQ
1.How can I place an order for SDT5A100SAF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT5A100SAF-13 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 SDT5A100SAF-13 reliable?
The price and inventory of SDT5A100SAF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT5A100SAF-13 is usually 5 days.
3.What payment methods are accepted for SDT5A100SAF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT5A100SAF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT5A100SAF-13?
SDT5A100SAF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT5A100SAF-13 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 SDT5A100SAF-13?
For technical support, including SDT5A100SAF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT5A100SAF-13 requirements.
6.How does Aetrix verify that SDT5A100SAF-13 is sourced from the original manufacturer or authorized distributors?
All SDT5A100SAF-13 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 SDT5A100SAF-13 meets industry standards.
7.What is the process for return or replacement of SDT5A100SAF-13?
All SDT5A100SAF-13 units undergo pre-shipment inspection (PSI). If there is an issue with SDT5A100SAF-13, 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 SDT5A100SAF-13 part is unused and in its original packaging.
Return procedure for SDT5A100SAF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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