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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated US1A-13-F

Name: US1A-13-F
Brand: Diodes Incorporated
SKU: US1A-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: US1A-13-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: US1A-13-F.pdf

Description:: DIODE GEN PURP 50V 1A SMA

Quantity:: RFQ Add To RFQ list

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Inventory:15,000

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Product details

Overview

US1A-13-F from Diodes Incorporated is an ultra-fast surface-mount silicon rectifier diode in SMA package, rated for 50 V peak repetitive reverse voltage, 1.0 A average rectified output current at T_T = +75°C, and 50 ns reverse recovery time. It delivers high-efficiency AC/DC conversion in compact power supplies and switching regulators.

For engineers reviewing the US1A-13-F datasheet, US1A-13-F pinout, US1A-13-F application, or US1A-13-F equivalent, key selection criteria include its 30 A non-repetitive surge rating, 1.0 V forward voltage at 1.0 A, 5.0 µA peak reverse current at 25°C, RoHS-compliant lead-free plating, and suitability for automated SMT assembly.

Technical Context

This device operates as a unidirectional power rectifier with glass-passivated die construction to ensure stable junction performance under thermal cycling. Its ultra-fast 50 ns recovery time enables use in high-frequency switching topologies up to several hundred kHz without excessive switching loss.

The SMA package provides low thermal resistance (R_θJT = 30°C/W), enabling reliable operation at junction temperatures from –65°C to +150°C. Polarity is marked by a cathode band, and moisture sensitivity is rated Level 1 per J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum peak reverse voltage before breakdown; sets safe operating limit in bridge or flyback snubber circuits.
I_O	1.0 A @ T_T = +75°C - Continuous DC output current capability; derates linearly above 75°C per Fig. 1.
t_rr	50 ns - Measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables efficient operation in SMPS >200 kHz.
V_F	1.0 V @ I_F = 1.0 A - Forward conduction loss directly impacts thermal design and efficiency in low-voltage outputs.
I_FSM	30 A - Single half-sine surge rating at 8.3 ms; supports inrush current handling in offline input stages.
I_RM	5.0 µA @ 25°C - Low leakage preserves hold-up capacitance and reduces standby power in energy-sensitive designs.

Pinout & Package

SMA (DO-214AC) surface-mount package: molded plastic case, UL 94V-0 flammability rating, matte tin-plated terminals, cathode band polarity marking, 0.064 g weight.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Current entry terminal during forward conduction	Connected to AC source or switch node; must withstand full reverse voltage when off.
Cathode	Current exit terminal during forward conduction	Connected to output rail or ground return; marked by visible band; carries full load current.

Key Features

Feature	Design Value
Glass passivated die	Enhances long-term reliability and humidity resistance in industrial environments without hermetic sealing.
Ultra-fast 50 ns recovery	Reduces reverse recovery charge (Q_rr) and associated switching losses in high-frequency converters.
30 A surge rating	Withstands cold-start inrush and transient overloads without degradation in AC-DC front-end stages.
Lead-free & halogen-free	Complies with RoHS 2 and Diodes Inc.'s "Green" standard (<900 ppm Br/Cl, <1000 ppm Sb); supports eco-design requirements.

Applications

AC-DC Adapter Input Stage

DC-DC Converter Output Rectification

Use Scenario: Rectifying 50/60 Hz mains-derived AC after transformer or in universal-input offline SMPS.

IC Role / Device Role / Timing Role: Power rectifier in single-phase bridge or voltage-doubler configuration.

Use Value: Low V_F minimizes conduction loss; 50 V V_RRM matches typical 36 V RMS secondary windings with safety margin.

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 3.3–12 V outputs.

IC Role / Device Role / Timing Role: Unidirectional current path synchronized with primary-side switching.

Use Value: 50 ns t_rr prevents cross-conduction loss during synchronous rectification transitions.

Automotive Body Control Module Power Supply

Industrial Sensor Signal Conditioning Front-End

Use Scenario: Input rectification in 12 V battery-fed DC-DC modules subjected to load dump transients.

IC Role / Device Role / Timing Role: Primary rectifier protecting downstream regulators from reverse polarity and AC ripple.

Use Value: 30 A I_FSM handles ISO 7637-2 pulse 5a surges; –65°C to +150°C rating supports under-hood operation.

Use Scenario: Protection and level-shifting of analog sensor signals exposed to EMI or supply coupling.

IC Role / Device Role / Timing Role: Clamp diode and signal rectifier in precision op-amp input stages.

Use Value: Low 5.0 µA I_RM avoids signal offset drift; SMA footprint allows dense layout near sensors.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04U	400 V V_RRM, 1.05 V V_F @ 1 A, 35 ns t_rr, SMA package	Higher voltage rating suits 230 VAC inputs; faster recovery but higher V_F increases conduction loss at low voltages.	Select when designing for universal input (85–265 VAC) with tight t_rr constraints.
MBRS140T3G	40 V V_RRM, 0.55 V V_F @ 1 A, Schottky architecture, no reverse recovery	Lower V_F improves efficiency below 5 V outputs; limited to ≤40 V blocking; higher I_RM at elevated temperature.	Prefer for low-voltage, high-efficiency DC-DC outputs where reverse voltage never exceeds 30 V.

Compared with STTH1R04U and MBRS140T3G, US1A-13-F offers optimal balance of low V_F, moderate V_RRM, and robust surge capability for cost-sensitive 50 V-class AC-DC and DC-DC applications requiring proven reliability and automated assembly compatibility.

Availability

US1A-13-F is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converter secondary stages, and automotive body control module power supplies requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for US1A-13-F 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 North America.

The US1x series belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained SMT applications from consumer adapters to industrial power supplies.

FAQ

What is the maximum junction temperature for US1A-13-F?

The absolute maximum junction temperature is +150°C, and the storage temperature range matches this. Derating begins at +75°C for average output current, as shown in Figure 1 of DS16008. Thermal resistance from junction to terminal is 30°C/W, so proper PCB copper area and airflow are essential to maintain reliability at full load.

Is US1A-13-F suitable for synchronous rectification circuits?

No - US1A-13-F is a passive ultra-fast rectifier, not a MOSFET-based synchronous rectifier. It lacks gate control and cannot be actively switched. However, its 50 ns t_rr makes it compatible as a freewheeling or output rectifier in non-synchronous flyback or forward converters operating up to ~500 kHz.

Does US1A-13-F have a specified reverse recovery charge (Q_rr)?

No Q_rr value is published in DS16008 Rev. 11–2. The datasheet specifies only t_rr = 50 ns under defined test conditions (I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A). Designers requiring Q_rr should consult Diodes Incorporated's application engineering team or select alternative parts with fully characterized recovery metrics.

Can US1A-13-F replace a 1N4001 in a new design?

Yes, but with caveats: US1A-13-F offers faster recovery (50 ns vs. ~30 µs), lower V_F (1.0 V vs. ~1.1 V), and SMA surface-mount packaging versus through-hole DO-41. It is not a drop-in mechanical replacement, but functionally superior in high-frequency or space-constrained designs where 50 V blocking suffices.

US1A-13-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMA

Operating Temperature - Junction:: -65°C ~ 150°C

US1A-13-F FAQ

1.How can I place an order for US1A-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for US1A-13-F 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 US1A-13-F reliable?

The price and inventory of US1A-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1A-13-F is usually 5 days.

3.What payment methods are accepted for US1A-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1A-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for US1A-13-F?

US1A-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your US1A-13-F 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 US1A-13-F?

For technical support, including US1A-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1A-13-F requirements.

6.How does Aetrix verify that US1A-13-F is sourced from the original manufacturer or authorized distributors?

All US1A-13-F 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 US1A-13-F meets industry standards.

7.What is the process for return or replacement of US1A-13-F?

All US1A-13-F units undergo pre-shipment inspection (PSI). If there is an issue with US1A-13-F, 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 US1A-13-F part is unused and in its original packaging.

Return procedure for US1A-13-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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