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

Diodes Incorporated US1G-13

Name: US1G-13
Brand: Diodes Incorporated
SKU: US1G-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: US1G-13

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AC, SMA

Datasheet:: US1G-13.pdf

Description:: DIODE GEN PURP 400V 1A SMA

Quantity:: RFQ Add To RFQ list

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Inventory:9,371

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Product details

Overview

US1G-13 from Diodes Incorporated is a 1.0A surface-mount ultra-fast rectifier diode with 400V peak repetitive reverse voltage (V_RRM), 50ns reverse recovery time (t_rr), and 1.7V forward voltage drop at 1.0A (V_FM). It is used in high-frequency switching power supplies, AC/DC adapters, and DC/DC converter output rectification where fast recovery and low conduction loss are critical.

For engineers reviewing the US1G-13 datasheet, US1G-13 pinout, US1G-13 application, or US1G-13 equivalent, key selection criteria include its SMA package thermal resistance (R_θJT = 30°C/W), surge capability (I_FSM = 30A), RoHS-compliant matte tin plating, and cathode-band polarity marking for automated assembly verification.

Technical Context

This ultra-fast rectifier employs glass-passivated die construction to ensure stable junction performance under thermal cycling and high dv/dt conditions. Its 50ns reverse recovery time enables operation in 100–500kHz SMPS topologies without excessive switching loss or EMI generation.

The device is rated for 1.0A average rectified current at T_T = +75°C and supports capacitance-loaded circuits only with 20% current derating. Reverse leakage remains ≤5.0µA at 25°C and ≤100µA at 100°C across its full 400V blocking range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum non-repetitive reverse voltage before breakdown; defines safe operating margin in 230VAC input rectifiers.
t_rr	50 ns - Measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables efficient operation in high-frequency flyback and forward converters.
V_FM	1.7 V @ 1.0A - Forward conduction loss directly impacts thermal design and efficiency in 12V/24V output stages.
I_FSM	30 A - 8.3ms half-sine surge rating supports cold-start inrush and transient overload without failure.
R_θJT	30 °C/W - Junction-to-terminal thermal resistance determines heatsinking requirements in confined PCB layouts.
C_T	10 pF @ 1MHz, 4V - Low junction capacitance minimizes switching node ringing and EMI in high-dv/dt applications.

Pinout & Package

Package: SMA (DO-214AC), molded plastic case with UL 94V-0 flammability rating, moisture sensitivity level 1, and cathode band polarity marking.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry terminal	Connected to transformer secondary or switch node; must withstand peak forward surge current (30A).
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to output filter capacitor; sustains 400V reverse bias with ≤5µA leakage at 25°C.

Key Features

Feature	Design Value
Glass passivated die	Eliminates surface contamination risk and improves long-term reliability under humidity and bias stress.
Ultra-fast 50ns recovery	Reduces reverse recovery charge (Q_rr) to minimize switching loss and snubber dissipation in high-frequency designs.
Lead-free, halogen-free "Green" construction	Meets RoHS 2 and JEDEC J-STD-020 Level 1; compatible with lead-free reflow profiles and industrial environmental compliance.
SMA package with 30°C/W R_θJT	Enables direct PCB copper pour thermal relief without discrete heatsinks in ≤1.0A continuous output applications.

Applications

AC/DC Adapter Output Rectification

DC/DC Converter Secondary Side

Use Scenario: 12V/2A output stage in universal-input (90–264VAC) wall adapter with active clamp flyback topology.

IC Role / Device Role / Timing Role: Ultra-fast output rectifier replacing slower 1N4007; handles 100kHz switching frequency with minimal reverse recovery loss.

Use Value: Enables >88% efficiency at full load by reducing V_F and t_rr-related losses versus standard recovery diodes.

Use Scenario: 5V/3A isolated output in telecom DC/DC module using synchronous rectification assist.

IC Role / Device Role / Timing Role: Freewheeling diode during MOSFET dead-time; clamps inductive kickback with <50ns turn-off.

Use Value: Prevents voltage overshoot exceeding 5.5V rail tolerance by limiting reverse recovery tail current.

Industrial Power Supply Input Bridge

LED Driver Secondary Rectification

Use Scenario: Single-phase input rectification in 24V/10A programmable bench supply with PFC front-end.

IC Role / Device Role / Timing Role: Fast recovery leg in discrete bridge configuration; handles 50Hz line frequency with 30A surge immunity.

Use Value: Survives repeated cold-start surges without parameter drift due to glass-passivated junction stability.

Use Scenario: Constant-current LED string driver (36V, 700mA) with quasi-resonant buck-boost topology.

IC Role / Device Role / Timing Role: Output rectifier operating at 250kHz; blocks reverse voltage during MOSFET on-time with <10pF capacitance.

Use Value: Limits high-frequency switching noise coupling into LED current sense path via low C_T.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1L06S	Same SMA package; 600V V_RRM, 65ns t_rr, 1.7V V_F @ 1A	Higher voltage rating suits 375VDC bus designs; slightly slower recovery increases switching loss above 200kHz	Select when system requires >400V blocking margin but operates below 150kHz.
MBR140SFT1G	SMA package; Schottky structure; 40V V_RRM, 0.55V V_F @ 1A, no reverse recovery	Lower forward drop reduces conduction loss but limits use to ≤40V output stages; unsuitable for 400V line-referred circuits	Choose only for low-voltage (<24V) outputs where zero t_rr eliminates switching loss entirely.

Compared with STTH1L06S and MBR140SFT1G, US1G-13 delivers optimal balance of 400V blocking, 50ns speed, and 1.7V conduction loss for universal-input SMPS output stages-neither over-specified nor voltage-constrained.

Availability

US1G-13 is available at Aetrix Electronics and suitable for AC/DC adapters, industrial power supplies, and LED drivers requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing traceability.

Supply support for US1G-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, 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-frequency switching power conversion in consumer, industrial, and computing applications.

FAQ

What is the maximum junction temperature for US1G-13?

The US1G-13 has an operating junction temperature range of –65°C to +150°C. Its thermal resistance R_θJT is 30°C/W, meaning that at 1.0A average current and 1.7V forward drop (1.7W dissipation), the junction-to-terminal temperature rise is 51°C-well within safe limits when mounted on ≥1 cm² of 1oz copper.

Is US1G-13 suitable for use in a PFC boost diode position?

No. The US1G-13 is rated for 400V V_RRM, while typical PFC boost outputs reach 380–400V DC under nominal conditions and exceed 420V during transients. A 600V-rated part like US1J-13 or STTH1L06S is required for reliable PFC diode operation.

Does US1G-13 have a specified reverse recovery charge (Q_rr)?

No. The DS16008 datasheet provides t_rr (50ns) and I_R/I_F test conditions but does not specify Q_rr. Engineers should estimate Q_rr using t_rr and di/dt assumptions or select alternatives (e.g., FRED Pt series) if Q_rr is a critical design parameter.

Can US1G-13 be substituted for US1M-13 in a 1000V design?

No. US1M-13 has 1000V V_RRM; substituting US1G-13 (400V) would result in catastrophic reverse breakdown under normal operating voltage. The two share identical package and current rating but differ fundamentally in voltage capability-substitution is unsafe and violates design margin requirements.

US1G-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 400 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMA

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

US1G-13 FAQ

1.How can I place an order for US1G-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for US1G-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 US1G-13 reliable?

The price and inventory of US1G-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1G-13 is usually 5 days.

3.What payment methods are accepted for US1G-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1G-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for US1G-13?

US1G-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your US1G-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 US1G-13?

For technical support, including US1G-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1G-13 requirements.

6.How does Aetrix verify that US1G-13 is sourced from the original manufacturer or authorized distributors?

All US1G-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 US1G-13 meets industry standards.

7.What is the process for return or replacement of US1G-13?

All US1G-13 units undergo pre-shipment inspection (PSI). If there is an issue with US1G-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 US1G-13 part is unused and in its original packaging.

Return procedure for US1G-13:

1.Submit a request within 90 days.

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

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