My Inquiry
My Account
Taiwan Semiconductor Corporation UF1G R1G
- Part No.:
- UF1G R1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF1G R1G.pdf
- Description:
- DIODE GEN PURP 400V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,331
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UF1G R1G from Taiwan Semiconductor is a 1 A, 400 V repetitive peak reverse voltage (VRRM) high-efficiency ultra-fast recovery rectifier in DO-204AL (DO-41) package, featuring 50 ns reverse recovery time (trr), 1.0 V forward voltage at 1 A and 25°C, and glass passivated junction for robust high-temperature switching performance. It serves as a freewheeling diode in DC-DC converters and switching-mode inverters.
For engineers reviewing the UF1G R1G datasheet, UF1G R1G pinout, UF1G R1G application, or UF1G R1G equivalent, key selection criteria include its 400 V VRRM rating, ultra-fast 50 ns trr, 1.0 V VF at 1 A, DO-41 mechanical compatibility, and AEC-Q101 qualification option (UF1GH).
Technical Context
This discrete silicon PN-junction rectifier uses a single-die construction with glass passivation to ensure stable operation up to 150°C junction temperature. Its soft recovery characteristics and low 17 pF junction capacitance minimize switching noise and EMI in high-frequency power conversion stages.
The device operates with a 30 A non-repetitive surge current rating (IFSM) and exhibits low thermal resistance - 15°C/W junction-to-lead - enabling reliable conduction under transient load conditions without external heatsinking in typical 1 A continuous applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - supports input rectification or freewheeling in 28 V–350 V DC bus systems |
| IF | 1 A continuous - suitable for low-to-medium power SMPS outputs and auxiliary rails |
| trr | 50 ns - enables efficient operation up to ~500 kHz switching frequencies with minimal turn-off loss |
| VF @ 1A, 25°C | 1.0 V - contributes to <1 W conduction loss at full rated current |
| RθJL | 15 °C/W - allows direct PCB trace heat dissipation without heatsink in ambient ≤70°C |
| IR @ 400 V, 125°C | 150 µA - ensures low leakage in high-temp industrial environments |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded, cathode indicated by band. Leads are pure tin plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Forward current entry point | Connected to lower-potential node (e.g., switch node or ground return in flyback snubber) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to higher-potential rail (e.g., output capacitor positive or DC bus) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable parametric performance and reliability at TJ = 150°C without degradation |
| Soft recovery characteristic | Reduces voltage overshoot and ringing during turn-off, easing EMI filter design |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental regulations for industrial and automotive use |
| UL 94V-0 molding compound | Provides flame-retardant encapsulation required for safety-certified power supplies |
Applications
| DC-DC Converter Output Rectification | Switching Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated 12–48 V output DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional current path with low VF and fast trr to minimize conduction and switching losses. Use Value: 1.0 V VF at 1 A and 50 ns trr directly reduce average power loss and improve efficiency >2% over standard FR1G in 300 kHz designs. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters. IC Role / Device Role / Timing Role: Clamps inductive kickback voltage and recirculates current during switch-off phase. Use Value: Soft recovery and 400 V VRRM prevent voltage spikes exceeding 350 V rail, eliminating need for TVS clamping in many 24/48 V systems. |
| AC-DC Auxiliary Supply | Industrial Sensor Power Rail |
Use Scenario: Rectification of low-power AC-derived auxiliary supplies (e.g., 12 V bias for gate drivers or controllers). IC Role / Device Role / Timing Role: Input-stage bridge or single-diode rectifier delivering clean, low-noise DC to LDOs or buck regulators. Use Value: 5 µA IR at 25°C and 150 µA at 125°C ensure negligible standby current drain in always-on sensor modules. | Use Scenario: Reverse polarity protection and supply decoupling in 24 V industrial I/O modules with extended temperature requirements. IC Role / Device Role / Timing Role: Polarity guard and transient energy sink during hot-swap or cable disconnect events. Use Value: 30 A IFSM and 150°C TJ max allow survival of 10 ms 20 A surges common in field-wiring faults without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same 1 A / 400 V rating; trr = 45 ns (slightly faster); VF = 1.15 V (higher); DO-41 package | Marginally better high-frequency efficiency but higher conduction loss at light loads | Prefer when minimizing turn-off loss dominates system thermal budget |
| ON Semi MUR140 | Same 1 A / 400 V; trr = 50 ns; VF = 1.25 V; slightly higher RθJA (70°C/W vs 60°C/W) | Lower cost in high-volume procurement; reduced thermal margin at elevated ambient | Prefer for cost-sensitive industrial controls where board space allows minor layout adjustment |
Compared with STTH1R04 and MUR140, the UF1G R1G delivers the lowest forward voltage (1.0 V) among 1 A / 400 V ultra-fast rectifiers in DO-41, making it optimal for thermally constrained or efficiency-critical 12–48 V DC-DC outputs where conduction loss dominates total loss.
Availability
UF1G R1G is available at Aetrix Electronics and suitable for DC-DC converter output rectification, switching inverter freewheeling, and industrial sensor power rail applications requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for UF1G R1G 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 industrial, computing, and automotive markets since 1979.
The UF1G R1G belongs to TSC's UF1x ultra-fast rectifier family, engineered specifically for high-efficiency, high-reliability switching power supplies where low VF, fast trr, and thermal robustness are critical.
FAQ
What is the maximum junction temperature rating for UF1G R1G?
The UF1G R1G has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version G2104). This rating applies under steady-state and transient conditions, provided thermal design maintains junction temperature within this limit. Derating curves in Figure 1 confirm 1 A continuous current is sustainable up to 125°C ambient with standard PCB copper area. The UF1G R1G must not be operated beyond 150°C TJ to ensure long-term reliability.
Is UF1G R1G RoHS and halogen-free compliant?
Yes, the UF1G R1G is fully RoHS compliant and halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the "Features" section of the Taiwan Semiconductor datasheet (Version G2104). The DO-204AL (DO-41) package uses halogen-free epoxy molding compound, and the pure tin-plated leads meet J-STD-002 solderability standards. This compliance is certified for all standard UF1G R1G units supplied by Taiwan Semiconductor.
What does the 'R1G' suffix indicate in UF1G R1G?
The 'R1G' suffix in UF1G R1G denotes Taiwan Semiconductor's internal reel packaging code: 'R' indicates tape-and-reel packaging, '1' specifies 5,000 units per reel, and 'G' identifies green (halogen-free) compound. This matches the ordering information table in the UF1x datasheet (Version G2104), where 'UF1x' with no suffix corresponds to tape-and-reel, and 'R1G' is the standard commercial reel variant for UF1G R1G.
Does UF1G R1G have AEC-Q101 qualification?
The base UF1G R1G is not AEC-Q101 qualified; however, the AEC-Q101 variant is designated UF1GH (with 'H' suffix). Per the Ordering Information table in the Taiwan Semiconductor UF1x datasheet (Version G2104), only parts marked 'UF1xH' or 'UF1xHA0G' are AEC-Q101 qualified. UF1G R1G meets industrial-grade reliability but lacks the extended stress testing required for automotive under-hood applications.
What is the reverse recovery time (trr) of UF1G R1G and how is it measured?
The UF1G R1G has a maximum reverse recovery time (trr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the Electrical Specifications table in the Taiwan Semiconductor datasheet (Version G2104). This test condition reflects realistic switching behavior in DC-DC converters. Figure 6 confirms the test circuit uses a 1 MHz square wave drive with defined di/dt and voltage step, ensuring reproducible measurement of soft recovery waveform tail.
UF1G R1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 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 @ 400 V
- Capacitance @ Vr, F:
- 17pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
UF1G R1G FAQ
1.How can I place an order for UF1G R1G through Aetrix?
Please submit a Request for Quotation (RFQ) for UF1G R1G 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 UF1G R1G reliable?
The price and inventory of UF1G R1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1G R1G is usually 5 days.
3.What payment methods are accepted for UF1G R1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1G R1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF1G R1G?
UF1G R1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF1G R1G 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 UF1G R1G?
For technical support, including UF1G R1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1G R1G requirements.
6.How does Aetrix verify that UF1G R1G is sourced from the original manufacturer or authorized distributors?
All UF1G R1G 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 UF1G R1G meets industry standards.
7.What is the process for return or replacement of UF1G R1G?
All UF1G R1G units undergo pre-shipment inspection (PSI). If there is an issue with UF1G R1G, 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 UF1G R1G part is unused and in its original packaging.
Return procedure for UF1G R1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UF1G R1G 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…
