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Diodes Incorporated US1MDF-13
- Part No.:
- US1MDF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
US1MDF-13.pdf
- Description:
- DIODE GEN PURP 1KV 1A DFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:18,848
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Product details
Overview
US1MDF-13 from Diodes Incorporated is a 1.0A, 1000V ultra-fast recovery surface-mount rectifier in the D-FLAT package, featuring 75ns reverse recovery time, 1.7V max forward voltage at 1.0A, and 5µA max reverse leakage at 25°C. It serves as a primary AC/DC or DC/DC output rectifier in compact power supplies requiring high efficiency and low profile.
For engineers reviewing the US1MDF-13 datasheet, US1MDF-13 pinout, US1MDF-13 application, or US1MDF-13 equivalent, key selection criteria include VRRM=1000V, tRR=75ns, VF=1.7V@1A, IR=5µA@25°C, and D-FLAT thermal performance (RθJA=80°C/W on FR-4).
Technical Context
This ultra-fast rectifier uses glass-passivated silicon die to achieve stable switching behavior under repetitive surge conditions up to 30A peak. Its 75ns reverse recovery time minimizes switching losses in high-frequency converters operating above 100kHz.
The D-FLAT package provides low thermal resistance (RθJT=44°C/W) and sub-1.1mm height, enabling placement beneath low-clearance heat sinks or in ultra-thin power modules. Polarity is marked by a cathode band on the molded plastic case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Blocks 1000V peak reverse voltage without breakdown, suitable for 700V RMS input lines. |
| IO(AV) | 1.0 A - Continuous average forward current rating at 25°C ambient with proper PCB copper area. |
| tRR | 75 ns - Ultra-fast recovery enables efficient operation in 100–500 kHz SMPS topologies. |
| VF @ 1.0A | 1.7 V - Forward drop determines conduction loss; contributes ~1.7W dissipation at full load. |
| IR @ 25°C | 5 µA - Low leakage preserves efficiency in standby and light-load conditions. |
| RθJA | 80 °C/W - Thermal resistance on standard 1"×1", 2oz FR-4 board; requires thermal pad design for >0.6A continuous use. |
Pinout & Package
Package: D-FLAT - Molded plastic, halogen-free, RoHS-compliant surface-mount package with 0.035g mass and maximum 1.10mm height. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to AC or switching node side; accepts 1.0A average forward current. |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail; sustains 1000V reverse bias during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Ensures long-term reliability and stable electrical parameters under humidity and thermal cycling. |
| Ultra-fast 75ns recovery | Reduces switching loss and EMI generation in high-frequency DC-DC converters. |
| 30A non-repetitive surge rating | Withstands inrush currents in offline SMPS without degradation. |
| D-FLAT low-profile form factor | Enables ≤1.1mm board stack-up in space-constrained adapters and USB-PD modules. |
Applications
| AC-DC Adapter Rectification | DC-DC Converter Output Stage |
|---|---|
Use Scenario: 12V/1A isolated flyback adapter for IoT gateways with <15mm height constraint. IC Role / Device Role / Timing Role: Primary output rectifier converting transformer secondary AC to regulated DC. Use Value: 75ns tRR and 1.7V VF minimize conduction + switching loss, improving efficiency to >85% at full load. | Use Scenario: 5V/1A buck-derived point-of-load supply in industrial PLC I/O module. IC Role / Device Role / Timing Role: Synchronous rectifier replacement where gate drive complexity is undesirable. Use Value: D-FLAT footprint and 1.1mm height allow placement under FPGA or microcontroller heat spreaders. |
| LED Driver Secondary Side | Automotive Infotainment Power Rail |
Use Scenario: Constant-current LED driver for automotive interior lighting with 24V input. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback delivering 350mA to 36V string. Use Value: 1000V VRRM accommodates reflected transients from inductive loads; 5µA IR ensures low standby drain. | Use Scenario: Dual-rail 5V/3.3V power supply in head unit with extended temperature range. IC Role / Device Role / Timing Role: Input rectifier for secondary-side DC-DC stage fed from isolated 12V bus. Use Value: -55°C to +150°C operating range and 30A surge rating support automotive thermal and load dump requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06S | VRRM=600V, tRR=50ns, VF=1.5V@1A, DPAK package | Limited to ≤420V RMS input; lower VF but larger footprint and higher RθJA | Select when 600V rating suffices and lowest VF is prioritized over size. |
| ES1J-M3/84A | VRRM=600V, tRR=35ns, VF=1.7V@1A, SMA package | Lower voltage rating; faster recovery but higher RθJA (120°C/W) limits power density | Prefer for cost-sensitive consumer designs where 600V margin is adequate. |
Compared with STTH1R06S and ES1J-M3/84A, US1MDF-13 uniquely delivers 1000V blocking with D-FLAT's 1.1mm height and 80°C/W thermal resistance-critical for compact, high-input-voltage industrial and automotive power stages.
Availability
US1MDF-13 is available at Aetrix Electronics and suitable for switching mode power supplies, DC-DC converters, and LED driver secondary-side rectification requiring stable component supply across industrial, automotive, and consumer production programs.
Supply support for US1MDF-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The US1MDF-13 belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-efficiency, high-density AC/DC and isolated DC/DC conversion in space- and thermally-constrained applications.
FAQ
What is the maximum junction temperature for US1MDF-13?
The US1MDF-13 has an operating junction temperature range of –55°C to +150°C. This rating is validated per JEDEC standards and applies under specified thermal conditions: RθJA = 80°C/W on a 1" × 1", 2oz FR-4 board with 0.1" × 0.15" copper pads. Derating is required above 125°C ambient.
Is US1MDF-13 compatible with lead-free reflow soldering processes?
Yes. US1MDF-13 features matte tin annealed terminals over copper leadframe and is qualified for lead-free reflow per J-STD-020. Its moisture sensitivity level is rated Class 1, meaning it may be stored indefinitely at ≤30°C/85% RH without baking prior to assembly.
How does the D-FLAT package compare thermally to SMA or SOD-123?
The D-FLAT package offers RθJA = 80°C/W on standard FR-4, significantly better than SMA (≈140°C/W) and SOD-123 (≈160°C/W). Its dual-side thermal path and larger copper contact area enable higher power density without heatsinks in 1A-class rectification.
Can US1MDF-13 replace US1JDF-13 in existing designs?
Yes, with voltage margin consideration. US1MDF-13 (1000V VRRM) can directly replace US1JDF-13 (600V VRRM) where higher reverse voltage capability is needed. Both share identical D-FLAT package, pinout, thermal characteristics, and electrical timing-no layout or thermal redesign is required.
US1MDF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- D-FLAT
- Package/Case:
- 2-SMD, Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.7 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 75 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1MDF-13 FAQ
1.How can I place an order for US1MDF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for US1MDF-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 US1MDF-13 reliable?
The price and inventory of US1MDF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1MDF-13 is usually 5 days.
3.What payment methods are accepted for US1MDF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1MDF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1MDF-13?
US1MDF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1MDF-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 US1MDF-13?
For technical support, including US1MDF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1MDF-13 requirements.
6.How does Aetrix verify that US1MDF-13 is sourced from the original manufacturer or authorized distributors?
All US1MDF-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 US1MDF-13 meets industry standards.
7.What is the process for return or replacement of US1MDF-13?
All US1MDF-13 units undergo pre-shipment inspection (PSI). If there is an issue with US1MDF-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 US1MDF-13 part is unused and in its original packaging.
Return procedure for US1MDF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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