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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation MUR420S V7G

Name: MUR420S V7G
Brand: Taiwan Semiconductor Corporation
SKU: MUR420S V7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR420S V7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: MUR420S V7G.pdf

Description:: DIODE GEN PURP 200V 4A DO214AB

Quantity:: RFQ Add To RFQ list

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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 equipment.

For engineers reviewing the MUR420S datasheet, MUR420S pinout, MUR420S application, or MUR420S equivalent, key selection criteria include repetitive peak reverse voltage (200V), thermal resistance (R_θJA = 45°C/W), junction temperature range (–55°C to +175°C), and RoHS/halogen-free compliance for industrial-grade power conversion designs.

Technical Context

The MUR420S is a single-die, glass-passivated silicon PN junction rectifier optimized for high-frequency operation. Its ultra-fast recovery (trr ≤ 25ns) minimizes switching losses in SMPS topologies, while the DO-214AB package supports automated placement and meets J-STD-020 moisture sensitivity level 1.

Electrical behavior is characterized by low forward voltage drop (VF ≤ 0.875V @ 4A, 25°C), tight reverse leakage (IR ≤ 5μA @ 25°C), and stable junction capacitance (CJ = 65pF @ 1MHz, 4V). Thermal performance is defined by R_θJC = 8.5°C/W and R_θJA = 45°C/W under standard PCB mounting conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse blocking voltage; sets upper limit for input/output voltage rails in DC-DC converters
I_F	4 A - Continuous average forward current; defines steady-state power handling in freewheeling or output rectification paths
t_rr	25 ns - Ultra-fast reverse recovery time; enables >100 kHz switching frequencies with minimal turn-off loss
V_F (max)	0.875 V @ 4A, 25°C - Low conduction loss improves efficiency in high-current, low-voltage secondary-side rectification
R_θJA	45 °C/W - Junction-to-ambient thermal resistance; determines required heatsinking or PCB copper area for thermal management
I_FSM	75 A - Non-repetitive peak surge current; withstands inrush and transient overloads without failure
T_J (max)	+175 °C - Maximum junction temperature; supports operation in high-ambient environments like enclosed telecom power modules

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode-indicated by band. Matte tin-plated leads, UL 94V-0 molding compound, JESD201 Class 2 whisker resistant.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap)
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail or filter capacitor; polarity marked by visible band on body

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and humidity resistance in unsealed industrial enclosures
Ultra-fast 25 ns recovery	Reduces switching loss and EMI generation in >100 kHz SMPS designs
Moisture sensitivity level 1	Enables direct use in SMT reflow without baking, lowering manufacturing cost and risk
RoHS & halogen-free	Meets IEC 61249-2-21 and global environmental compliance requirements for export-ready products
DO-214AB (SMC) package	Provides robust thermal dissipation (R_θJC = 8.5°C/W) and compatibility with standard pick-and-place equipment

Applications

High-Frequency SMPS Output Rectification	Freewheeling Diode in DC-DC Converters
Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters powering server PSUs and telecom line cards. IC Role / Device Role / Timing Role: Unidirectional current path enabling DC output generation; operates synchronously with primary-side MOSFET switching. Use Value: 25 ns t_rr and 0.875 V V_F reduce conduction and switching losses, improving full-load efficiency by ~0.8% vs. standard fast rectifiers.	Use Scenario: Clamp path across inductive loads (e.g., solenoids, relay coils, buck inductors) in industrial control modules. IC Role / Device Role / Timing Role: Provides low-impedance return path during inductor current decay; suppresses voltage spikes during MOSFET turn-off. Use Value: 75 A I_FSM handles repetitive energy dumps; 200 V V_RRM ensures margin against L·di/dt transients up to 160 V.
AC-DC Adapter Secondary Rectification	Switching Inverter Freewheeling Path
Use Scenario: Output rectification in compact 12–24 V, 20–60 W wall adapters for networking equipment and IoT gateways. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to regulated DC; placed directly on secondary-side PCB with minimal trace length. Use Value: DO-214AB footprint allows dense layout; 0.25 g weight and SMC package support lightweight, space-constrained mechanical design.	Use Scenario: Bidirectional freewheeling path in half-bridge motor drive inverters for HVAC blowers and fan controllers. IC Role / Device Role / Timing Role: Conducts reverse current during dead-time intervals; clamps shoot-through risk and recovers before next switching edge. Use Value: 25 ns t_rr prevents cross-conduction in 50–100 kHz PWM; 175°C T_J(max) sustains operation under continuous thermal stress.

High-Frequency SMPS Output Rectification

Freewheeling Diode in DC-DC Converters

Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters powering server PSUs and telecom line cards.

IC Role / Device Role / Timing Role: Unidirectional current path enabling DC output generation; operates synchronously with primary-side MOSFET switching.

Use Value: 25 ns t_rr and 0.875 V V_F reduce conduction and switching losses, improving full-load efficiency by ~0.8% vs. standard fast rectifiers.

Use Scenario: Clamp path across inductive loads (e.g., solenoids, relay coils, buck inductors) in industrial control modules.

IC Role / Device Role / Timing Role: Provides low-impedance return path during inductor current decay; suppresses voltage spikes during MOSFET turn-off.

Use Value: 75 A I_FSM handles repetitive energy dumps; 200 V V_RRM ensures margin against L·di/dt transients up to 160 V.

AC-DC Adapter Secondary Rectification

Switching Inverter Freewheeling Path

Use Scenario: Output rectification in compact 12–24 V, 20–60 W wall adapters for networking equipment and IoT gateways.

IC Role / Device Role / Timing Role: Converts high-frequency transformer output to regulated DC; placed directly on secondary-side PCB with minimal trace length.

Use Value: DO-214AB footprint allows dense layout; 0.25 g weight and SMC package support lightweight, space-constrained mechanical design.

Use Scenario: Bidirectional freewheeling path in half-bridge motor drive inverters for HVAC blowers and fan controllers.

IC Role / Device Role / Timing Role: Conducts reverse current during dead-time intervals; clamps shoot-through risk and recovers before next switching edge.

Use Value: 25 ns t_rr prevents cross-conduction in 50–100 kHz PWM; 175°C T_J(max) sustains operation under continuous thermal stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06W	600 V V_RRM, 4 A I_F, trr = 35 ns, TO-220AC package	Higher voltage rating but slower recovery and through-hole mounting	Prefer when >400 V blocking or legacy through-hole assembly is required
ON Semi MUR420E	Same 200 V/4 A rating, trr = 25 ns, DO-214AB package, but higher VF (0.92 V max)	Identical footprint and function; slightly higher conduction loss	Acceptable drop-in alternative where <0.05 V VF increase is tolerable

Compared with STTH4L06W and MUR420E, the MUR420S offers optimal balance of 200 V rating, 25 ns speed, and SMC surface-mount compatibility - making it preferred for new high-density, high-efficiency 100–300 kHz SMPS designs where thermal and layout constraints dominate.

Availability

MUR420S is available at Aetrix Electronics and suitable for high-frequency SMPS output rectification, freewheeling in DC-DC converters, and switching inverter clamp paths requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.

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 discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and computing markets.

The MUR420S belongs to TSC's ultra-fast recovery rectifier product line, engineered specifically for high-efficiency, high-frequency AC-DC and DC-DC power conversion systems where low VF, fast trr, and robust thermal performance are critical.

FAQ

What is the maximum junction temperature rating for the MUR420S?

The MUR420S has a maximum junction temperature (T_J) rating of +175°C, allowing reliable operation in thermally demanding environments such as enclosed telecom power supplies or industrial motor drives. This rating is validated per TSC's F2102 datasheet and supports extended lifetime under continuous 150°C ambient conditions when properly heatsinked. The MUR420S maintains stable electrical parameters up to this limit.

Does the MUR420S have a RoHS and halogen-free certification?

Yes, the MUR420S is RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the official Taiwan Semiconductor datasheet (Version F2102). The device uses green molding compound and matte tin-plated leads, meeting both environmental directives without derating or performance compromise. This makes the MUR420S suitable for export to EU, Japan, and other regulated markets.

What is the reverse recovery time (t_rr) specification for the MUR420S?

The MUR420S has a reverse recovery time (t_rr) of ≤25 ns under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_RR = 0.25 A, as specified in the TSC F2102 datasheet. This ultra-fast value enables efficient operation in switching power supplies operating above 100 kHz, reducing switching losses and associated EMI compared to standard fast recovery diodes.

Is the MUR420S compatible with lead-free reflow soldering processes?

Yes, the MUR420S is fully compatible with lead-free reflow soldering per J-STD-002. Its matte tin-plated leads and DO-214AB package are qualified for peak temperatures up to 260°C, and its moisture sensitivity level is rated at Level 1 (J-STD-020), meaning no pre-baking is required prior to assembly. This simplifies manufacturing and reduces process risk for the MUR420S.

What is the marking code and package type for the MUR420S?

The MUR420S is marked "MUR420S" on the device body and packaged in DO-214AB (SMC) - a surface-mount case with cathode indicated by a band. The SMC outline provides superior thermal performance (R_θJC = 8.5°C/W) and mechanical robustness versus smaller packages like SMA or SMB, and is optimized for automated placement in high-volume production of the MUR420S.

MUR420S V7G 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 V7G FAQ

1.How can I place an order for MUR420S V7G through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR420S V7G 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 V7G reliable?

The price and inventory of MUR420S V7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR420S V7G is usually 5 days.

3.What payment methods are accepted for MUR420S V7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR420S V7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR420S V7G?

MUR420S V7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR420S V7G 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 V7G?

For technical support, including MUR420S V7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR420S V7G requirements.

6.How does Aetrix verify that MUR420S V7G is sourced from the original manufacturer or authorized distributors?

All MUR420S V7G 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 V7G meets industry standards.

7.What is the process for return or replacement of MUR420S V7G?

All MUR420S V7G units undergo pre-shipment inspection (PSI). If there is an issue with MUR420S V7G, 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 V7G part is unused and in its original packaging.

Return procedure for MUR420S V7G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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