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Vishay General Semiconductor - Diodes Division UG4D-E3/73
- Part No.:
- UG4D-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UG4D-E3/73.pdf
- Description:
- DIODE GEN PURP 200V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
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Product details
Overview
UG4D-E3/73 from Vishay General Semiconductor is a miniature ultrafast plastic rectifier diode in DO-201AD package, rated for 200 V repetitive peak reverse voltage (VRRM), 4.0 A average forward current (IF(AV)), and 20 ns maximum reverse recovery time (trr). It features low 0.95 V forward voltage at 4.0 A and operates up to 150 °C junction temperature, enabling high-efficiency freewheeling in switching-mode power supplies for telecom infrastructure.
For engineers reviewing the UG4D-E3/73 datasheet, UG4D-E3/73 pinout, UG4D-E3/73 application, or UG4D-E3/73 equivalent, key selection criteria include its 200 V VRRM rating, ultrafast 20 ns trr, DO-201AD mechanical compatibility, 150 A IFSM surge capability, and RoHS-compliant matte tin-plated leads suitable for automated assembly.
Technical Context
This device is a single silicon PN junction diode with glass-passivated pellet construction, optimized for high-frequency rectification where fast switching and low conduction loss are critical. Its 20 ns trr and 15 nC Qrr at 25 °C support efficient operation in DC-DC converters operating above 100 kHz.
The DO-201AD package provides thermal resistance of 25 °C/W (junction-to-ambient, PCB-mounted with 0.47" × 0.47" copper pads), and its 150 A non-repetitive surge rating enables robust handling of inductive turn-off transients in motor drive freewheeling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input rectification in 115/230 VAC offline SMPS with sufficient margin against line surges |
| IF(AV) | 4.0 A - continuous DC output current capability in compact 12–24 V secondary-side synchronous rectifier replacements |
| trr | 20 ns - enables stable operation in >500 kHz switching converters without excessive switching loss or EMI |
| VF @ 4.0 A | 0.95 V - reduces conduction loss to ≤3.8 W at full load, improving thermal management in sealed enclosures |
| IFSM | 150 A - withstands inrush and fault currents in UPS and server PSU hold-up circuits without bond wire failure |
| TJ max. | 150 °C - allows derated operation in high-ambient industrial environments up to 85 °C ambient with standard heatsinking |
Pinout & Package
Package: DO-201AD axial leaded plastic case with cathode band marking; 0.375" (9.5 mm) lead length; UL 94 V-0 molding compound; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to lower-potential side (e.g., switch node in buck converter freewheel path) |
| Cathode | Forward current exit node | Marked by color band; tied to output rail or ground return path in unidirectional conduction |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability under humidity and thermal cycling stress per JESD 22-A101 |
| Ultrafast 20 ns trr | Minimizes reverse recovery charge (Qrr = 15 nC) to reduce EMI and cross-conduction risk in synchronous topologies |
| Low VF (0.95 V @ 4 A) | Delivers ≥92 % conduction efficiency at full load, lowering thermal design burden vs. Schottky alternatives with higher leakage |
| 150 A IFSM rating | Supports transient overload tolerance in PFC boost diodes and inverter leg snubbers without parameter shift |
Applications
| Telecom AC-DC Adapters | Server PSU Secondary Rectification |
|---|---|
Use Scenario: High-density 48 V output stage in 1U rack-mount server PSUs operating at 300–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectifier auxiliary winding circuit. Use Value: 20 ns trr prevents shoot-through during gate driver dead-time; 0.95 V VF maintains <1.5 °C/W thermal rise at 4 A. | Use Scenario: Output rectification in multi-rail telecom brick converters delivering ±12 V and 3.3 V. IC Role / Device Role / Timing Role: Primary output rectifier for 12 V rail with 100 kHz–1 MHz variable frequency control. Use Value: 200 V VRRM accommodates reflected transients from coupled inductors; DO-201AD footprint fits legacy layouts. |
| Industrial Motor Drive Snubbers | Automotive DC-DC Converter Freewheeling |
Use Scenario: RCD snubber clamp diode across IGBTs in 3-phase 400 V inverter drives. IC Role / Device Role / Timing Role: Fast recovery path for inductive energy dissipation during IGBT turn-off. Use Value: 150 A IFSM handles 2× motor stall current spikes; 150 °C TJ max enables operation near heatsink baseplate. | Use Scenario: 12 V to 5 V/3.3 V step-down converter in automotive infotainment head units. IC Role / Device Role / Timing Role: Freewheeling diode in buck converter operating at 2.1 MHz with spread-spectrum modulation. Use Value: 20 ns trr ensures clean current commutation below 50 ns dead-time; RoHS/E3 compliance meets automotive ELV directive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06D | 600 V VRRM, 4 A IF(AV), 35 ns trr, TO-220AC package | Higher voltage rating but slower recovery and larger footprint; requires heatsink for same thermal performance | Select when system requires >200 V blocking with legacy TO-220 layout |
| ES3D-E3/57T | 200 V VRRM, 3 A IF(AV), 35 ns trr, DO-214AB (SMC) surface-mount package | Lower current rating and SMT-only mounting; no axial lead option for through-hole designs | Select when board space is constrained and reflow assembly is available |
Compared with STTH4L06D and ES3D-E3/57T, UG4D-E3/73 offers the fastest trr (20 ns) in axial DO-201AD form factor, enabling higher-frequency designs without thermal penalty-critical for next-gen telecom and server power density targets.
Availability
UG4D-E3/73 is available at Aetrix Electronics and suitable for telecom AC-DC adapters, server PSU secondary rectification, and industrial motor drive snubbers requiring stable component supply and consistent DO-201AD mechanical fit.
Supply support for UG4D-E3/73 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and optoelectronics with emphasis on reliability and high-volume manufacturability.
The UG4x series is part of Vishay's ultrafast rectifier product line, engineered specifically for high-frequency switching power conversion in consumer, computing, and communications equipment where low trr and VF are essential.
FAQ
What is the maximum junction temperature rating for UG4D-E3/73?
The UG4D-E3/73 has a maximum junction temperature (TJ max.) of +150 °C, verified per JEDEC JESD22-A104 thermal testing. This rating allows sustained operation in high-ambient environments such as enclosed telecom chassis or industrial control cabinets when mounted on PCBs with adequate copper area. Derating curves in Figure 1 confirm 4.0 A IF(AV) is maintainable up to 85 °C ambient with standard 0.47" × 0.47" copper pads.
Does UG4D-E3/73 meet RoHS and halogen-free requirements?
Yes, UG4D-E3/73 is RoHS-compliant per Directive 2011/65/EU and carries the "E3" suffix indicating commercial-grade, matte tin-plated leads and JESD 201 Class 1A whisker resistance. It is not halogen-free; for halogen-free compliance, the M3-suffix variant (e.g., UG4D-M3/73) must be selected. Both variants meet UL 94 V-0 flammability standards.
What is the reverse recovery time (trr) specification for UG4D-E3/73 under typical operating conditions?
The UG4D-E3/73 specifies a maximum trr of 20 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. At full-load conditions (IF = 4.0 A, dI/dt = 50 A/μs, VR = 30 V), typical trr rises to 30 ns at 25 °C and 50 ns at 100 °C-values confirmed in Figure 5 of the official datasheet (Document Number: 88763).
Can UG4D-E3/73 replace UG4C-E3/73 in an existing design?
Yes, UG4D-E3/73 can directly replace UG4C-E3/73 in most cases because both share identical DO-201AD package, pinout, thermal characteristics, and forward conduction behavior. The only difference is VRRM: UG4C is rated for 150 V, while UG4D is rated for 200 V. Substituting UG4D-E3/73 provides additional voltage margin without layout or thermal changes-ideal for designs targeting global mains input or transient-prone environments.
What is the thermal resistance (RθJA) of UG4D-E3/73 in standard PCB mounting?
The typical junction-to-ambient thermal resistance (RθJA) for UG4D-E3/73 is 25 °C/W when mounted on a PCB with 0.47" × 0.47" (12 mm × 12 mm) copper pads and 0.375" (9.5 mm) lead length, per Figure 2 and Thermal Characteristics table in datasheet 88763. This value assumes still air convection and excludes external heatsinking; actual RθJA may improve with forced airflow or thermal vias.
UG4D-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 20pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
UG4D-E3/73 FAQ
1.How can I place an order for UG4D-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for UG4D-E3/73 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 UG4D-E3/73 reliable?
The price and inventory of UG4D-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UG4D-E3/73 is usually 5 days.
3.What payment methods are accepted for UG4D-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UG4D-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UG4D-E3/73?
UG4D-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UG4D-E3/73 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 UG4D-E3/73?
For technical support, including UG4D-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UG4D-E3/73 requirements.
6.How does Aetrix verify that UG4D-E3/73 is sourced from the original manufacturer or authorized distributors?
All UG4D-E3/73 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 UG4D-E3/73 meets industry standards.
7.What is the process for return or replacement of UG4D-E3/73?
All UG4D-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with UG4D-E3/73, 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 UG4D-E3/73 part is unused and in its original packaging.
Return procedure for UG4D-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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