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Taiwan Semiconductor Corporation MUR420S R7G
- Part No.:
- MUR420S R7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR420S R7G.pdf
- Description:
- DIODE GEN PURP 200V 4A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,955
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Product details
Overview
MUR420S from Taiwan Semiconductor is a 4A, 200V ultra-fast recovery surface-mount rectifier diode in DO-214AB (SMC) package, featuring 25ns reverse recovery time, 0.875V max forward voltage at 4A/25°C, and 75A peak surge current - deployed in high-frequency switching mode power supplies for telecom and computing infrastructure.
For engineers reviewing the MUR420S datasheet, MUR420S pinout, MUR420S application, or MUR420S equivalent, key selection criteria include ultra-fast trr (25ns), low VF at rated IF, thermal resistance (RθJA = 45°C/W), junction temperature range (–55°C to +175°C), and DO-214AB mechanical compatibility with automated SMT assembly.
Technical Context
The MUR420S employs a glass-passivated silicon junction optimized for high-efficiency rectification in DC-DC converters and freewheeling paths. Its 25ns reverse recovery time minimizes switching losses during high-frequency operation up to several hundred kHz.
Designed as a single-die, unidirectional device with cathode-band polarity marking, it supports continuous forward current of 4A at 175°C junction temperature and withstands 200V repetitive peak reverse voltage with only 5μA leakage at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - maximum repetitive reverse voltage the diode blocks without breakdown |
| IF | 4 A - continuous average forward current rating at case temperature ≤ 115°C |
| trr | 25 ns - ultra-fast recovery enables efficient operation in ≥200 kHz SMPS topologies |
| VF (max) | 0.875 V @ 4A, 25°C - low conduction loss improves system efficiency and thermal margin |
| IFSM | 75 A - peak non-repetitive surge current handling for startup/load-dump transients |
| RθJA | 45 °C/W - thermal resistance from junction to ambient under standard PCB mounting conditions |
| TJ max | +175 °C - extended junction temperature capability supports high-power density designs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck freewheel path) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or positive bus; blocks 200V reverse voltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance in industrial environments |
| Ultra-fast 25ns trr | Reduces switching losses and EMI generation in high-frequency converters |
| DO-214AB (SMC) package | Enables automated pick-and-place and supports >4A thermal dissipation on standard 1-oz copper |
| Junction temp range –55°C to +175°C | Validates operation in under-hood automotive, base station, and industrial motor drive applications |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and environmental requirements for global electronics manufacturing |
Applications
| Telecom AC-DC Front-End | Server VRM Freewheel Diode |
|---|---|
Use Scenario: Rectifying 100–300 kHz PFC boost output in telecom rectifier modules. IC Role / Device Role / Timing Role: Ultra-fast output rectifier replacing slower FRDs to reduce conduction + switching loss. Use Value: 25ns trr and 0.875V VF cut total losses by ~12% vs. standard fast recovery diodes at 4A/200kHz. | Use Scenario: Freewheel path in multiphase buck converters supplying CPU/GPU core voltage. IC Role / Device Role / Timing Role: Low-VF, low-trr discrete diode enabling high-efficiency synchronous rectification backup. Use Value: Enables <1.0V dropout at 4A while maintaining <30ns recovery for clean current commutation. |
| Industrial SMPS Output Stage | Motor Drive Snubber Clamp |
Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters. IC Role / Device Role / Timing Role: Primary output rectifier delivering regulated 12–48V DC to PLC I/O modules. Use Value: 175°C TJ rating ensures stable operation in enclosed enclosures with ambient up to 85°C. | Use Scenario: Clamp diode across IGBT gate-emitter or collector-emitter in servo drives. IC Role / Device Role / Timing Role: Fast-recovery snubber element suppressing voltage spikes during turn-off. Use Value: 25ns trr and 75A IFSM provide robust transient energy absorption without oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06S | 600V VRRM, 20ns trr, 1.15V VF @ 4A - higher voltage rating, faster recovery, higher VF | Better suited for 400–600V bus systems; less optimal for 200V designs due to over-spec'd voltage | Select when 600V blocking and sub-20ns trr are required; verify layout thermal relief for higher VF |
| ES4D-E3/57T | 200V VRRM, 35ns trr, 0.92V VF @ 4A - same voltage, slower recovery, slightly higher VF | Acceptable where 35ns trr meets EMI/efficiency targets; lower cost in high-volume consumer SMPS | Choose for cost-sensitive 200V applications where 10ns slower recovery is tolerable |
Compared with STTH4L06S and ES4D-E3/57T, the MUR420S delivers optimal balance of 200V rating, 25ns speed, and 0.875V VF - making it ideal for space-constrained, thermally demanding 200V telecom and server power stages.
Availability
MUR420S is available at Aetrix Electronics and suitable for telecom rectifiers, server VRMs, industrial SMPS, and motor drive clamping circuits requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for MUR420S 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and communications markets since 1979.
The MUR420S belongs to TSC's ultra-fast recovery rectifier product line, engineered specifically for high-frequency, high-efficiency AC-DC and DC-DC conversion where low trr and low VF are critical to thermal and efficiency targets.
FAQ
What is the maximum junction temperature rating for the MUR420S?
The MUR420S has a maximum junction temperature (TJ max) of +175°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version F2102). This rating allows reliable operation in high-ambient environments such as enclosed power supplies and industrial control cabinets. Derating curves confirm usable current down to 0A at 175°C case temperature. The MUR420S must be mounted on appropriate copper area to maintain this limit under full load.
Does the MUR420S have a specified reverse recovery time, and under what test conditions?
Yes, the MUR420S has a typical reverse recovery time (trr) of 25 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the official Taiwan Semiconductor datasheet. This value is confirmed for the MUR420S variant only - MUR440S and MUR460S specify 50 ns. The test circuit and waveform definitions are detailed in Figure 6 of the MUR420S–MUR460S datasheet.
What is the forward voltage drop of the MUR420S at rated current and temperature?
The MUR420S exhibits a maximum forward voltage (VF) of 0.875 V at IF = 4 A and TJ = 25°C, and 0.710 V at IF = 4 A and TJ = 150°C. These values are specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet (Version F2102). The lower VF at elevated temperature reflects improved carrier injection efficiency in silicon at high junction temperatures.
Is the MUR420S RoHS and halogen-free compliant?
Yes, the MUR420S is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the Features section of the official Taiwan Semiconductor datasheet. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin-plated per J-STD-002 solderability standards. Full compliance documentation is available upon request from Aetrix Electronics.
What package type and marking does the MUR420S use?
The MUR420S uses the DO-214AB (SMC) surface-mount package with cathode polarity indicated by a visible band. Marking code on the device reads "MUR420S", followed by green compound (G), date code (YW), and factory code (F) per the Marking Diagram in the datasheet. Weight is approximately 0.250 g, and moisture sensitivity level is J-STD-020 Level 1.
MUR420S R7G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 875 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 65pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR420S R7G FAQ
1.How can I place an order for MUR420S R7G through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR420S R7G 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 MUR420S R7G reliable?
The price and inventory of MUR420S R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR420S R7G is usually 5 days.
3.What payment methods are accepted for MUR420S R7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR420S R7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR420S R7G?
MUR420S R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR420S R7G 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 MUR420S R7G?
For technical support, including MUR420S R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR420S R7G requirements.
6.How does Aetrix verify that MUR420S R7G is sourced from the original manufacturer or authorized distributors?
All MUR420S R7G 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 MUR420S R7G meets industry standards.
7.What is the process for return or replacement of MUR420S R7G?
All MUR420S R7G units undergo pre-shipment inspection (PSI). If there is an issue with MUR420S R7G, 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 MUR420S R7G part is unused and in its original packaging.
Return procedure for MUR420S R7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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