My Inquiry
My Account
Taiwan Semiconductor Corporation US1KHR3G
- Part No.:
- US1KHR3G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
US1KHR3G.pdf
- Description:
- DIODE GEN PURP 800V 1A DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
US1KHR3G from Taiwan Semiconductor is a 800 V, 1 A ultrafast surface-mount rectifier diode in DO-214AC (SMA) package, featuring 75 ns reverse recovery time, 1.7 V max forward voltage at 1 A, and 30 A peak surge current - deployed in snubber networks and DC-DC converter freewheeling paths.
For engineers reviewing the US1KHR3G datasheet, US1KHR3G pinout, US1KHR3G application, or US1KHR3G equivalent, key selection criteria include repetitive peak reverse voltage (800 V), thermal resistance (RθJA = 75 °C/W), junction temperature range (–55 to +150 °C), and RoHS/halogen-free compliance for industrial power conversion designs.
Technical Context
This ultrafast rectifier employs a glass-passivated single-die PN junction optimized for high-frequency switching applications. Its 75 ns reverse recovery time and low junction capacitance (10 pF at 4 V) minimize switching losses in SMPS topologies operating above 50 kHz.
The device operates across –55 °C to +150 °C junction temperature, with RθJL = 27 °C/W enabling efficient heat transfer to PCB copper. Cathode polarity is marked by a visible band on the DO-214AC molded body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports input rectification in 400 V AC line-derived DC-DC converters without derating |
| IF | 1 A continuous - suitable for low-to-medium power output stages up to ~15 W at 12 V |
| trr | 75 ns - enables stable operation in 100–500 kHz flyback and forward converters |
| VF (max) | 1.7 V @ 1 A, 25 °C - contributes ≤1.7 W conduction loss per diode in freewheeling path |
| RθJA | 75 °C/W - requires ≥1 cm² of 1-oz copper pad for safe 1 A operation at 70 °C ambient |
| IFSM | 30 A (8.3 ms half-sine) - withstands inrush and transient overloads in unregulated supplies |
| Junction temp | –55 to +150 °C - qualified for extended industrial and lighting environments |
Pinout & Package
DO-214AC (SMA) surface-mount package with molded epoxy body, matte tin-plated leads, and cathode polarity indicated by a band on the case. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal | Connected to switch node or transformer secondary winding in flyback/freewheeling configuration |
| Cathode | Current exit terminal | Connected to output rail or ground return path; marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage performance (<5 µA @ 25 °C, <150 µA @ 125 °C) under humid conditions |
| Ultrafast recovery (75 ns) | Reduces reverse recovery charge (Qrr) to <15 nC, limiting EMI and cross-conduction loss |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines |
| Halogen-free (IEC 61249-2-21) | Meets environmental compliance for export to EU, Japan, and China without material declaration burden |
Applications
| DC-DC Converter Freewheeling | Snubber Network Clamping |
|---|---|
Use Scenario: Freewheeling path in 12–24 V output flyback converters delivering up to 15 W. IC Role / Device Role / Timing Role: Unidirectional current path during MOSFET off-time; blocks reverse voltage during switching transitions. Use Value: 75 ns trr minimizes tail current overlap with primary-side switch, reducing total system losses by ~8% vs. standard fast recovery diodes. | Use Scenario: RC snubber across MOSFET drain-source in 60–100 kHz inverters driving LED drivers or small motors. IC Role / Device Role / Timing Role: Clamp transient voltage spikes during turn-off by conducting brief high-di/dt current pulses. Use Value: 30 A IFSM rating ensures robustness against repeated 200–400 V transients without degradation. |
| Switching Mode Lighting Ballast | Industrial AC-DC Input Stage |
Use Scenario: Output rectification in constant-current LED driver modules for streetlight and high-bay fixtures. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to regulated DC; handles 100% duty-cycle conduction during dimming intervals. Use Value: RθJA = 75 °C/W allows direct mounting on aluminum-backed PCBs, eliminating need for thermal vias in cost-sensitive designs. | Use Scenario: Bridge rectifier leg in universal-input (85–265 V AC) offline SMPS for PLC I/O modules. IC Role / Device Role / Timing Role: High-voltage rectification stage preceding bulk capacitor; sustains 800 V PIV under worst-case line surges. Use Value: VRRM = 800 V provides 2× safety margin over 400 V DC bus peaks, meeting IEC 61000-4-5 Level 3 surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | Same VRRM (800 V), lower VF (1.3 V typ), higher trr (100 ns), TO-277 package | Higher conduction efficiency but slower recovery increases switching loss in >200 kHz designs | Prefer when thermal budget is tight and frequency ≤150 kHz |
| ES1J-E3/5AT | Same DO-214AC package, identical VRRM/IF, trr = 75 ns, but IR = 10 µA @ 25 °C (vs. 5 µA) | Slightly higher leakage acceptable in non-temperature-critical lighting controls | Drop-in replacement where leakage <10 µA is sufficient and sourcing flexibility is prioritized |
Compared with STTH1R08 and ES1J-E3/5AT, US1KHR3G delivers the lowest reverse leakage (5 µA) and best thermal resistance match to DO-214AC layout constraints, making it optimal for compact, thermally constrained 100–300 kHz industrial power supplies requiring long-term reliability.
Availability
US1KHR3G is available at Aetrix Electronics and suitable for DC-DC converters, snubber networks, lighting ballasts, and industrial AC-DC input stages requiring stable component supply and full RoHS/halogen-free compliance.
Supply support for US1KHR3G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.
The US1x series was designed specifically for high-efficiency, high-frequency switching power supplies - emphasizing ultrafast recovery, low leakage, and robust SMT manufacturability in cost-sensitive applications.
FAQ
What is the maximum junction temperature rating for US1KHR3G?
The US1KHR3G has a maximum junction temperature (TJ) of +150 °C and a minimum of –55 °C. This wide operating range allows deployment in enclosed industrial enclosures or high-ambient lighting fixtures without forced cooling. The device's RθJA of 75 °C/W means that at 1 A continuous current and 70 °C ambient, junction temperature remains within spec if mounted on ≥1 cm² of 1-oz copper.
Does US1KHR3G meet RoHS and halogen-free requirements?
Yes, US1KHR3G is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This makes US1KHR3G suitable for export to EU, Japan, South Korea, and China without additional substance declarations.
What is the reverse recovery time (trr) of US1KHR3G and how is it measured?
The US1KHR3G has a maximum reverse recovery time (trr) of 75 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standards. This value is confirmed across the full temperature range (25–125 °C) and ensures minimal switching loss in 100–500 kHz power topologies. The low trr results directly from its optimized ultrafast epitaxial structure.
Is US1KHR3G suitable for use in a bridge rectifier configuration?
US1KHR3G is a single-die, single-anode/single-cathode ultrafast rectifier and is not rated for bridge configurations. It must be used as one leg of a discrete bridge (e.g., four US1KHR3G devices). For integrated bridges, consider TSC's GBU series or equivalent. Each US1KHR3G leg must be independently heatsinked and routed to avoid thermal coupling.
What packaging and reel quantity is available for US1KHR3G?
US1KHR3G is supplied in DO-214AC (SMA) package on 7,500-unit tape-and-reel format per J-STD-020 moisture sensitivity level 1. No baking is required before SMT reflow. Reel dimensions comply with EIA-481-D standards, and each reel includes full traceability data including lot code and date code (YW format) printed on the tape cover.
US1KHR3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 800 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 @ 800 V
- Capacitance @ Vr, F:
- 10pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
- Operating Temperature - Junction:
- -55°C ~ 150°C
US1KHR3G FAQ
1.How can I place an order for US1KHR3G through Aetrix?
Please submit a Request for Quotation (RFQ) for US1KHR3G 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 US1KHR3G reliable?
The price and inventory of US1KHR3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for US1KHR3G is usually 5 days.
3.What payment methods are accepted for US1KHR3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for US1KHR3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for US1KHR3G?
US1KHR3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your US1KHR3G 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 US1KHR3G?
For technical support, including US1KHR3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your US1KHR3G requirements.
6.How does Aetrix verify that US1KHR3G is sourced from the original manufacturer or authorized distributors?
All US1KHR3G 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 US1KHR3G meets industry standards.
7.What is the process for return or replacement of US1KHR3G?
All US1KHR3G units undergo pre-shipment inspection (PSI). If there is an issue with US1KHR3G, 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 US1KHR3G part is unused and in its original packaging.
Return procedure for US1KHR3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
US1KHR3G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
