My Inquiry
My Account
Taiwan Semiconductor Corporation UF1M
- Part No.:
- UF1M
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF1M.pdf
- Description:
- DIODE GEN PURP 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,785
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UF1M from Taiwan Semiconductor is a 1000 V, 1 A high-efficiency ultrafast rectifier diode in DO-204AL (DO-41) package, featuring soft recovery (trr ≤ 75 ns), glass passivated junction, and AEC-Q101 qualification option. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.
For engineers reviewing the UF1M datasheet, UF1M pinout, UF1M application, or UF1M equivalent, key selection criteria include peak reverse voltage (1000 V), forward voltage at 1 A (≤1.7 V), reverse recovery time (≤75 ns), thermal resistance (RθJL = 15 °C/W), and AEC-Q101 availability for automotive-grade reliability.
Technical Context
The UF1M is a single-die, silicon planar epitaxial ultrafast rectifier optimized for high-frequency operation up to several hundred kHz. Its soft recovery behavior minimizes EMI generation during commutation, and its glass passivation ensures stable performance under thermal cycling and humid environments.
Designed for operation at junction temperatures up to +150 °C, the UF1M maintains low leakage (IR ≤ 5 µA at 25 °C, ≤150 µA at 125 °C) and exhibits predictable capacitance (CJ = 17 pF at 4 V) - critical for snubberless flyback and resonant converter designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports input rectification in 800 VAC systems or DC bus clamping in industrial inverters |
| IF | 1 A continuous - suitable for low-to-medium power SMPS outputs (e.g., 12–48 V, ≤12 W) |
| trr | ≤75 ns - enables efficient operation in 100–500 kHz switching topologies with reduced switching loss |
| VF | ≤1.7 V at IF = 1 A, TJ = 25 °C - limits conduction loss to ≤1.7 W per device at full load |
| RθJL | 15 °C/W - allows direct PCB copper pad heatsinking without external heatsink for ≤0.8 W dissipation |
| IFSM | 30 A (8.3 ms half-sine) - withstands inrush currents in offline AC/DC front-end stages |
| Junction Temp | −55 to +150 °C - rated for under-hood automotive and industrial ambient conditions |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking. 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 (unmarked end) | Current entry point during forward conduction | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node) |
| Cathode (banded end) | Current exit point during forward conduction; blocking terminal during reverse bias | Connected to output rail or positive bus; polarity must be observed to prevent catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Soft recovery characteristic | Reduces voltage overshoot and EMI during turn-off, eliminating need for RC snubbers in many 100–300 kHz designs |
| Glass passivated junction | Ensures long-term reliability under humidity, thermal shock, and high-bias stress - validated per AEC-Q101 when qualified |
| AEC-Q101 qualification option | Enables use in automotive powertrain and body electronics where component-level stress testing is mandated |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive - required for export to EU, Japan, and China markets |
Applications
| DC–DC Converter Output Rectification | Switching Mode Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous or diode rectification in isolated flyback or forward converters delivering 5–48 V at ≤1 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary into regulated DC output. Use Value: Low VF (≤1.7 V) and soft recovery minimize conduction and switching losses, improving efficiency by 0.5–1.2% over standard fast rectifiers. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings, solenoids) in half-bridge or full-bridge inverters operating at 20–200 kHz. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during dead-time, preventing voltage spikes across switching devices. Use Value: 75 ns trr and soft recovery suppress ringing and reduce gate driver stress, enabling higher switching frequencies without added snubbing. |
| Industrial AC/DC Front-End Clamping | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Clamp diode in voltage multiplier or transient suppression circuits handling 600–1000 V DC link voltages in motor drives and UPS systems. IC Role / Device Role / Timing Role: Absorbs inductive kickback energy and clamps peak reverse transients to safe levels. Use Value: 1000 V VRRM and 30 A IFSM support robust protection in 800 V-class systems with minimal derating. | Use Scenario: Auxiliary 12 V supply rectification in AEC-Q101-compliant OBC control boards, powered from transformer secondaries. IC Role / Device Role / Timing Role: High-reliability output rectifier meeting automotive temperature and lifetime requirements. Use Value: Glass passivation and optional AEC-Q101 qualification ensure >15-year field life under −40 to +125 °C ambient cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | VRRM = 600 V, trr = 50 ns, VF = 1.15 V @ 1 A - lower voltage rating, faster recovery, lower VF | Not suitable for 800–1000 V systems; preferred where <600 V blocking and lowest conduction loss are prioritized | Select STTH1R06 only if system VR ≤ 420 V RMS and EMI sensitivity demands fastest possible trr |
| ON Semi MUR110 | VRRM = 1000 V, trr = 75 ns, VF = 1.7 V @ 1 A - identical voltage and recovery specs; no AEC-Q101 option | Lacks automotive qualification path; used in industrial/commercial power supplies where AEC-Q101 is not required | Choose MUR110 for cost-sensitive non-automotive designs requiring same 1000 V/1 A/75 ns performance without qualification overhead |
Compared with STTH1R06 and MUR110, the UF1M uniquely combines 1000 V rating, soft recovery, and AEC-Q101 availability - making it the only choice for automotive 12 V auxiliary supplies in 800 V battery systems requiring both high-voltage margin and qualification traceability.
Availability
UF1M is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, automotive-grade reliability, and high-voltage rectification capability.
Supply support for UF1M 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 UF1M belongs to TSC's UF1x ultrafast rectifier family, engineered specifically for high-frequency, high-reliability power conversion where soft recovery, thermal robustness, and qualification-ready variants are essential.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the UF1M?
The UF1M has a maximum repetitive peak reverse voltage (VRRM) of 1000 V. This rating is confirmed in the Absolute Maximum Ratings table of the official TSC G2104 datasheet, and defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown. The UF1M is therefore suitable for use in 800 V DC bus systems with appropriate safety margin.
Does the UF1M have AEC-Q101 qualification?
The UF1M is available in an AEC-Q101-qualified version, denoted by the "H" suffix (e.g., UF1MH). Standard UF1M parts are not automatically qualified; qualification applies only to ordering codes ending in "H". The AEC-Q101 qualification covers stress tests including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing - all verified per TSC's G2104 specification revision.
What is the forward voltage (VF) of the UF1M at 1 A and 25 °C?
The forward voltage (VF) of the UF1M is guaranteed ≤1.7 V at IF = 1 A and TJ = 25 °C, as specified in the Electrical Specifications table of the TSC G2104 datasheet. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects, and represents worst-case conduction loss for thermal design calculations.
What package type does the UF1M use, and what are its mechanical features?
The UF1M uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include glass passivated chip junction, pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 molding compound, cathode band polarity marking, and a typical weight of 0.330 g. These attributes support automated assembly and long-term reliability in harsh environments.
How does the UF1M's reverse recovery time compare to other members of the UF1x family?
The UF1M shares the same reverse recovery time (trr ≤ 75 ns) as UF1J and UF1K, while UF1A–UF1G are rated ≤50 ns. This grouping reflects internal die optimization: higher-voltage variants (600–1000 V) use a different epitaxial structure that trades slight speed reduction for improved high-voltage blocking and softness - a deliberate design choice confirmed in the Electrical Specifications table of the UF1x datasheet.
UF1M 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):
- 1000 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 @ 1000 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
UF1M FAQ
1.How can I place an order for UF1M through Aetrix?
Please submit a Request for Quotation (RFQ) for UF1M 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 UF1M reliable?
The price and inventory of UF1M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1M is usually 5 days.
3.What payment methods are accepted for UF1M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF1M?
UF1M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF1M 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 UF1M?
For technical support, including UF1M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1M requirements.
6.How does Aetrix verify that UF1M is sourced from the original manufacturer or authorized distributors?
All UF1M 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 UF1M meets industry standards.
7.What is the process for return or replacement of UF1M?
All UF1M units undergo pre-shipment inspection (PSI). If there is an issue with UF1M, 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 UF1M part is unused and in its original packaging.
Return procedure for UF1M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UF1M 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…
