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Diodes Incorporated UG1001-T
- Part No.:
- UG1001-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UG1001-T.pdf
- Description:
- DIODE GEN PURP 50V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:9,941
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Product details
Overview
UG1001-T from Diodes Incorporated is a 1.0A ultra-fast glass passivated rectifier diode in DO-41 package, rated for 50V peak repetitive reverse voltage, 1.0V forward voltage at 1.0A, and 50ns reverse recovery time, used in high-frequency AC/DC conversion stages of offline power supplies and DC-DC front-end rectification.
For engineers reviewing the UG1001-T datasheet, UG1001-T pinout, UG1001-T application, or UG1001-T equivalent, key selection criteria include its 30A non-repetitive surge rating, low 5.0μA reverse leakage at 25°C, 95°C/W thermal resistance, and DO-41 mechanical compatibility with legacy through-hole layouts.
Technical Context
This device implements a planar epitaxial silicon PN junction with glass passivation to suppress surface leakage and enhance reliability under thermal cycling. Its ultra-fast recovery (50ns) enables operation in switching frequencies up to several hundred kHz without excessive switching loss.
The DO-41 axial package supports lead-free soldering per MIL-STD-202 Method 208, with cathode band polarity marking and 0.35g mass. Thermal performance is defined under standard 9.5mm lead length condition, requiring derating above 55°C ambient per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Repetitive Reverse Voltage | 50 V - Maximum sustained reverse bias before breakdown; sets minimum insulation margin in 24–48V input rectifiers |
| Average Forward Current @ TA=55°C | 1.0 A - Continuous DC output capability when leads held at ambient at 9.5mm from case |
| Forward Voltage @ IF=1.0A | 1.0 V - Conduction loss of 1.0W at full load; impacts efficiency and heatsink sizing |
| Reverse Recovery Time | 50 ns - Enables use in 200–500 kHz SMPS without excessive diode switching loss or EMI |
| Surge Current (8.3ms) | 30 A - Withstands inrush and line transient events in unregulated AC inputs |
| Reverse Leakage @ 25°C | 5.0 μA - Low leakage preserves hold-up capacitance and reduces standby power |
| Thermal Resistance JA | 95 °C/W - Junction-to-ambient rise under free-air conditions; defines natural convection cooling limit |
Pinout & Package
DO-41 axial-leaded plastic package with cathode band marking; body diameter 4.06–5.21 mm, overall length 25.40 mm, lead diameter 0.71–0.864 mm, lead spacing 2.00–2.72 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry node | Connected to AC source or transformer secondary; must withstand surge and RMS current |
| Cathode (banded end) | Current exit node | Connected to bulk capacitor or downstream converter; polarity critical for correct rectification |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Eliminates surface contamination paths, enabling stable IR < 5μA over lifetime and humidity exposure |
| Ultra-fast 50ns trr | Reduces reverse recovery charge (Qrr) to ~25nC, minimizing turn-off loss in flyback and forward converters |
| 30A surge rating | Supports cold-start inrush in 120VAC-fed supplies without fuse blow or bond-wire failure |
| RoHS-compliant tin plating | Ensures reliable wetting and intermetallic formation during lead-free reflow or wave soldering |
Applications
| AC-DC Adapter Input Stage | Industrial Sensor Power Supply |
|---|---|
Use Scenario: Rectifying 50/60Hz or 100–120Hz doubler output in wall adapters delivering 5–12V/1A. IC Role / Device Role / Timing Role: Primary-side uncontrolled rectifier converting AC to pulsating DC prior to bulk capacitance. Use Value: 1.0V VF minimizes conduction loss at 1A; 50ns trr prevents excessive ringing when paired with transformer leakage inductance. | Use Scenario: Providing isolated 3.3V or 5V bias to analog sensor signal chains in factory automation nodes. IC Role / Device Role / Timing Role: Secondary-side rectifier in small-footprint flyback or forward converter operating at 250kHz. Use Value: Low 5μA IR ensures minimal discharge of hold-up cap between cycles, maintaining stable bias during microsecond-scale transients. |
| LED Driver Bulk Rectification | UPS Battery Charger Input |
Use Scenario: Full-wave rectification in constant-current LED drivers powering streetlight modules (20–40W). IC Role / Device Role / Timing Role: Bridge leg component handling 1A average current with intermittent 30A surges during AC zero-cross transitions. Use Value: 30A IFSM rating absorbs repeated line-synchronized surge events without degradation over 50,000-hour life. | Use Scenario: Input rectification stage in online UPS battery charging circuits with 100–240VAC input range. IC Role / Device Role / Timing Role: Front-end diode conducting continuous 1A while surviving brownout recovery surges and neutral-loss transients. Use Value: 95°C/W RθJA allows operation at full load up to 55°C ambient without forced airflow, reducing system cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4933 | Same DO-41 package, 100V VRRM, 1.2V VF @ 1A, 200ns trr | Slower recovery increases switching loss above 50kHz; suitable only for 50/60Hz or low-frequency choppers | Select only if higher reverse voltage margin is required and frequency ≤20kHz |
| UF4001 | DO-41, 50V VRRM, 1.0V VF @ 1A, 50ns trr, same footprint | Identical electrical specs and timing; fully interchangeable in layout and thermal design | Preferred drop-in alternative with active production status and broader distributor stock |
Compared with UG1001-T, 1N4933 trades speed for voltage headroom and is unsuitable for >50kHz designs, while UF4001 matches all key parameters and remains recommended for new designs-making it the preferred replacement where long-term supply assurance is required.
Availability
UG1001-T is available at Aetrix Electronics and suitable for AC-DC adapter input stages, industrial sensor power supplies, LED driver bulk rectification, and UPS battery charger input circuits requiring stable component supply and legacy DO-41 through-hole compatibility.
Supply support for UG1001-T 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, serving power management, signal integrity, and protection markets since 1960.
The UG1001-T belongs to Diodes' ultra-fast rectifier product line, engineered for high-efficiency, high-reliability AC/DC conversion in cost-sensitive consumer and industrial power supplies where DO-41 form factor and proven thermal robustness are essential.
FAQ
Is UG1001-T suitable for surface-mount assembly?
No. UG1001-T uses a DO-41 axial-leaded package designed exclusively for through-hole mounting. It lacks SMD-compatible terminations or tape-and-reel orientation for pick-and-place. For SMT alternatives, consider the SMBF- or SOD-123-packaged UF4001 equivalents.
What is the maximum allowable PCB temperature near the UG1001-T body during operation?
The device's storage and operating junction temperature range is –65°C to +150°C, but sustained PCB temperatures exceeding 100°C adjacent to the case will exceed the 95°C/W RθJA derating limit. Maintain local board temperature below 85°C at the lead entry point to ensure reliable 1.0A operation.
Does UG1001-T require heatsinking in 1A continuous operation?
Not under free-air conditions at TA ≤55°C, as specified in the derating curve. At 25°C ambient, junction temperature rise is ~95°C, reaching 120°C - within the 150°C absolute max. Heatsinking becomes necessary only above 55°C ambient or when operating above 0.7A in enclosed, still-air environments.
Why is UG1001-T marked "NOT RECOMMENDED FOR NEW DESIGN"?
Diodes Incorporated issued this notice because newer ultra-fast rectifiers like UF4001 offer identical electrical performance with improved manufacturing consistency, extended lifecycle support, and broader global distribution. The UG1001-T remains fully functional but is being phased out in favor of more readily supported alternatives.
UG1001-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 150°C
UG1001-T FAQ
1.How can I place an order for UG1001-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UG1001-T 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 UG1001-T reliable?
The price and inventory of UG1001-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UG1001-T is usually 5 days.
3.What payment methods are accepted for UG1001-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UG1001-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UG1001-T?
UG1001-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UG1001-T 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 UG1001-T?
For technical support, including UG1001-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UG1001-T requirements.
6.How does Aetrix verify that UG1001-T is sourced from the original manufacturer or authorized distributors?
All UG1001-T 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 UG1001-T meets industry standards.
7.What is the process for return or replacement of UG1001-T?
All UG1001-T units undergo pre-shipment inspection (PSI). If there is an issue with UG1001-T, 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 UG1001-T part is unused and in its original packaging.
Return procedure for UG1001-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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