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Diodes Incorporated S1MDF-13
- Part No.:
- S1MDF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- 2-SMD, Flat Leads
- Datasheet:
-
S1MDF-13.pdf
- Description:
- DIODE GEN PURP 1KV 1A DFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,817
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Product details
Overview
S1MDF-13 from Diodes Incorporated is a 1.0A, 1000V glass passivated surface-mount rectifier in the D-FLAT package, optimized for high-reliability standard rectification with VF ≤ 1.1V at 1A and IR ≤ 5μA at 1000V. It delivers surge robustness (30A peak), AEC-Q101 qualification, and ultra-low profile (<1.1mm height) for space-constrained power conversion stages in AC/DC adapters and LED lighting.
For engineers reviewing the S1MDF-13 datasheet, S1MDF-13 pinout, S1MDF-13 application, or S1MDF-13 equivalent, key selection criteria include its 1000V VRRM rating, 34°C/W junction-to-terminal thermal resistance, D-FLAT mechanical footprint, and AEC-Q101 compliance for automotive-adjacent industrial power designs.
Technical Context
The S1MDF-13 operates as a single-phase, half-wave silicon rectifier with unidirectional conduction defined by cathode-band polarity. Its glass passivated die ensures stable reverse characteristics up to 150°C junction temperature and enables reliable operation under repetitive 30A surge conditions per IEC 61000-4-5 surge immunity requirements.
Thermal performance is governed by low-profile D-FLAT mounting on FR-4 PCBs with specified copper pad dimensions (0.2" × 0.25"), yielding RθJT = 34°C/W and RθJA = 88°C/W - critical for thermal management in compact, convection-cooled SMPS and LED driver layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - Withstands peak reverse voltage in bridge or single-diode rectifier topologies without breakdown. |
| IO (at TA=+100°C) | 1.0 A - Continuous average forward current rating at elevated ambient, enabling compact heatsinkless designs. |
| VF (max @ 1A, 25°C) | 1.1 V - Low forward drop minimizes conduction loss and improves efficiency in 12–48V output SMPS. |
| IR (max @ 1000V, 25°C) | 5 µA - Ultra-low leakage preserves hold-up capacitance and reduces standby power in offline converters. |
| IFSM (8.3ms) | 30 A - Robust surge capability supports inrush current handling in AC input stages without derating. |
| RθJT | 34 °C/W - Enables direct thermal coupling to PCB copper, simplifying thermal design in low-profile enclosures. |
| Package | D-FLAT - 4.65 mm × 2.80 mm footprint with <1.1 mm height, compatible with automated SMT assembly and tight board spacing. |
Pinout & Package
The S1MDF-13 uses a 2-terminal D-FLAT package with cathode identified by a band on the top surface. No internal leads or multiple pins - terminals are anode and cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | AC input / positive half-cycle entry | Connects to transformer secondary or bridge input; must withstand full VRRM during reverse bias. |
| Cathode (banded end) | DC output / rectified node | Delivers pulsating DC to filter stage; polarity marking ensures correct orientation in series/parallel configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Eliminates moisture ingress risk and prevents parameter drift over time in humid environments. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| Lead-free, halogen-free "Green" construction | Meets RoHS 2 and JEDEC J-STD-020 Level 1 moisture sensitivity for zero bake requirement pre-reflow. |
| Low-profile D-FLAT package | Enables ≤1.1 mm board height in slim AC/DC adapters and retrofit LED drivers where Z-axis clearance is constrained. |
Applications
| Switching Mode Power Supplies | LED Lighting Drivers |
|---|---|
Use Scenario: Primary-side rectification in 12–24V output flyback converters for industrial control power supplies. IC Role / Device Role / Timing Role: High-voltage AC-to-DC conversion stage, conducting during positive half-cycles of transformer secondary voltage. Use Value: 1000V VRRM allows safe operation with 230VAC mains + line surges; 30A IFSM handles startup inrush without degradation. | Use Scenario: Secondary-side rectification in constant-current LED drivers for streetlight and commercial luminaires. IC Role / Device Role / Timing Role: Unidirectional current path delivering filtered DC to LED string, blocking reverse recovery current. Use Value: 1.1V VF at 1A limits conduction loss to <1.1W, reducing thermal load on compact aluminum-core PCBs. |
| AC/DC Adapters | Inverters |
Use Scenario: Output rectification in universal-input (90–264VAC), 5–12W wall adapters for consumer electronics. IC Role / Device Role / Timing Role: Final DC generation element after transformer isolation, feeding bulk capacitor and regulation circuitry. Use Value: D-FLAT package fits ≤12mm board thickness; 5µA IR at 1000V maintains >1000-hour hold-up time under light-load standby. | Use Scenario: Freewheeling diode in 400V DC-link inverters for HVAC fan motor drives. IC Role / Device Role / Timing Role: Provides safe current recirculation path during MOSFET turn-off, clamping inductive kickback. Use Value: 34°C/W RθJT enables direct PCB copper thermal spreading, avoiding discrete heatsinks in cost-sensitive inverter modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB1100-TB | Same 1000V VRRM, but TO-277 package (higher profile, 1.8mm); VF = 1.05V max @ 1A. | Larger footprint and height limit use in ultra-thin adapters; better thermal mass for higher ambient. | Select when board Z-height >1.5mm and thermal margin >10°C is required. |
| S1M-13-F | Same D-FLAT package, but non-AEC-Q101 rated; IR = 10µA max @ 1000V (2× higher leakage). | Not qualified for automotive-adjacent or extended-life industrial deployments. | Select for cost-sensitive consumer-grade AC/DC where AEC-Q101 and sub-5µA leakage are not mandatory. |
Compared with SB1100-TB and S1M-13-F, the S1MDF-13 uniquely combines AEC-Q101 qualification, 5µA IR ceiling, and sub-1.1mm D-FLAT height - making it the only choice for space-constrained, high-reliability rectification where both thermal and lifetime requirements are stringent.
Availability
S1MDF-13 is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and AC/DC adapters requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for S1MDF-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 S1MDF-13 belongs to Diodes' high-voltage rectifier product line, engineered specifically for compact, high-reliability AC/DC conversion in applications demanding AEC-Q101 validation and ultra-low profile packaging.
FAQ
What is the maximum junction temperature for continuous operation of the S1MDF-13?
The S1MDF-13 is rated for continuous operation from –55°C to +150°C junction temperature. At TA = +100°C, its IO rating remains 1.0A, and thermal derating follows the curve in Figure 1 - no external heatsink is required below 100°C ambient when mounted per JEDEC-standard PCB layout.
Does the S1MDF-13 have a specified reverse recovery time (trr)?
No - the S1MDF-13 is a standard recovery rectifier, not a fast- or ultrafast-recovery device. Its datasheet does not specify trr; it is intended for 50/60Hz and low-frequency (<100kHz) switching applications where soft recovery is acceptable and EMI constraints are moderate.
Can the S1MDF-13 be used in parallel for higher current handling?
Parallel operation is not recommended without external balancing resistors due to VF mismatch between units. The datasheet specifies no guaranteed matching; forward voltage variation across lots can exceed ±5%, leading to current imbalance and thermal runaway above 0.7A per device.
Is the S1MDF-13 suitable for use in automotive infotainment power supplies?
Yes - the S1MDF-13 is AEC-Q101 qualified and tested for automotive-grade reliability, including temperature cycling, high-temperature reverse bias, and humidity testing. It is approved for use in non-safety-critical automotive subsystems such as infotainment, body control, and lighting power rails.
S1MDF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- 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:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1000 V
- Capacitance @ Vr, F:
- 6pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D-Flat
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1MDF-13 FAQ
1.How can I place an order for S1MDF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for S1MDF-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 S1MDF-13 reliable?
The price and inventory of S1MDF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MDF-13 is usually 5 days.
3.What payment methods are accepted for S1MDF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MDF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1MDF-13?
S1MDF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1MDF-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 S1MDF-13?
For technical support, including S1MDF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MDF-13 requirements.
6.How does Aetrix verify that S1MDF-13 is sourced from the original manufacturer or authorized distributors?
All S1MDF-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 S1MDF-13 meets industry standards.
7.What is the process for return or replacement of S1MDF-13?
All S1MDF-13 units undergo pre-shipment inspection (PSI). If there is an issue with S1MDF-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 S1MDF-13 part is unused and in its original packaging.
Return procedure for S1MDF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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