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Taiwan Semiconductor Corporation MUR420H
- Part No.:
- MUR420H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
MUR420H.pdf
- Description:
- DIODE GEN PURP 200V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
MUR420H from Taiwan Semiconductor is an AEC-Q101-qualified ultra-fast recovery rectifier diode in DO-201AD package, rated for 4 A average forward current and 200 V repetitive peak reverse voltage, with 25 ns reverse recovery time and 0.89 V max forward voltage at 4 A - used in automotive DC-DC converters and switching inverters.
For engineers reviewing the MUR420H datasheet, MUR420H pinout, MUR420H application, or MUR420H equivalent, key selection criteria include its AEC-Q101 qualification, ultra-fast trr (25 ns), low VF (≤0.89 V), high TJ max (175°C), and DO-201AD leaded package compatibility with high-reliability power conversion designs.
Technical Context
The MUR420H employs a glass-passivated silicon junction optimized for high-frequency switching, delivering stable performance up to 175°C junction temperature. Its 25 ns reverse recovery time enables efficient operation in hard-switched topologies above 100 kHz.
Designed for unidirectional conduction in freewheeling and output rectification roles, it supports surge currents up to 125 A (8.3 ms half-sine) and exhibits low junction capacitance (65 pF at 1 MHz, 4 V), minimizing switching losses in SMPS and automotive power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 4 A - supports continuous output rectification in 50–100 W DC-DC stages |
| VRRM | 200 V - suitable for 12 V/24 V automotive input rails with 2× safety margin |
| trr | 25 ns - enables >200 kHz switching without excessive turn-off loss |
| VF (max) | 0.89 V @ 4 A, 25°C - reduces conduction loss vs. standard fast rectifiers |
| TJ max | 175°C - validated for under-hood automotive environments per AEC-Q101 |
| RθJL | 15°C/W - allows direct PCB copper heatsinking in compact layouts |
| IR (max) | 5 µA @ 200 V, 25°C - ensures low leakage in high-impedance hold-up circuits |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, J-STD-002 solderable, and pass JESD201 Class 2 whisker test.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry | Connected to switch node or transformer secondary center-tap in bridge/freewheeling paths |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or ground return; polarity must be observed to prevent catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power modules requiring zero-defect reliability and extended temperature cycling |
| Glass-passivated junction | Enhances moisture resistance and long-term stability in humid under-hood conditions |
| Ultra-fast 25 ns trr | Reduces reverse recovery charge (Qrr), lowering EMI and MOSFET stress in synchronous rectifier designs |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and automotive environmental directives for global vehicle production |
| Junction-to-lead RθJL = 15°C/W | Enables thermal coupling to copper pour without external heatsink in space-constrained PCBs |
Applications
| Automotive DC-DC Converter | Industrial Switch-Mode Inverter |
|---|---|
Use Scenario: Step-down conversion from 24 V battery to 5 V/3.3 V for ADAS ECUs and infotainment systems. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 25 ns trr minimizes cross-conduction loss with high-side FET; 175°C rating ensures operation near engine control units. | Use Scenario: DC bus freewheeling path in 3-phase motor drives for HVAC and pumps. IC Role / Device Role / Timing Role: Unidirectional current clamp during inductive kickback events. Use Value: 125 A IFSM withstands transient surges; glass passivation prevents corrosion in factory-floor humidity. |
| Telecom Power Supply | Renewable Energy Charge Controller |
Use Scenario: Secondary-side rectification in 48 V telecom rectifiers operating at 200–300 kHz. IC Role / Device Role / Timing Role: High-efficiency output diode replacing Schottky in cost-sensitive 50–100 W modules. Use Value: 0.89 V VF balances conduction loss vs. SiC cost; DO-201AD simplifies through-hole rework. | Use Scenario: Solar panel MPPT output stage rectifying variable 12–48 V DC into battery bank. IC Role / Device Role / Timing Role: Freewheeling diode across buck converter inductor during PWM off-time. Use Value: 175°C TJ max accommodates outdoor enclosure temperatures; low IR preserves battery float voltage accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R02DJF | Same DO-201AD package, 200 V VRRM, but trr = 35 ns (vs. 25 ns); VF = 0.95 V max | Lacks AEC-Q101 qualification; not approved for automotive under-hood use | Select when AEC-Q101 is not required and 10 ns slower recovery is acceptable |
| ON Semi MUR420G | Identical electrical specs and DO-201AD package, but not AEC-Q101 qualified; RoHS compliant only | No automotive qualification; lower traceability for OEM PPAP submissions | Choose for industrial or telecom where AEC-Q101 is unnecessary and cost sensitivity dominates |
Compared with STTH4R02DJF and MUR420G, the MUR420H delivers superior high-frequency efficiency via its 25 ns trr and meets automotive-grade reliability requirements - making it the only option qualified for AEC-Q101-compliant power stages in safety-critical vehicle subsystems.
Availability
MUR420H is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial motor drive freewheeling paths, and renewable energy charge controllers requiring stable component supply across multi-year production cycles.
Supply support for MUR420H 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 automotive, industrial, and computing markets since 1979.
The MUR420H belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-reliability, high-temperature power conversion in automotive electrification and industrial automation systems.
FAQ
What is the AEC-Q101 qualification status of the MUR420H?
The MUR420H is fully AEC-Q101 qualified per Rev. J2105 documentation, including temperature cycling, high-temperature operating life, and mechanical shock testing. This certification confirms its suitability for automotive under-hood applications where reliability at 175°C junction temperature is mandatory. The "H" suffix in MUR420H explicitly denotes AEC-Q101 compliance - a distinction not shared by non-H variants like MUR420G.
What is the maximum reverse recovery time (trr) specified for the MUR420H?
The MUR420H has a maximum reverse recovery time (trr) of 25 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This value is confirmed in the Electrical Specifications table on page 2 of the official Taiwan Semiconductor datasheet (Version J2105). It is measured using standardized pulse conditions and reflects actual device behavior in high-frequency switching circuits.
Does the MUR420H have a defined forward voltage (VF) specification, and at what conditions?
Yes, the MUR420H specifies a maximum forward voltage (VF) of 0.89 V at IF = 4 A and TJ = 25°C, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to avoid self-heating effects. At elevated junction temperatures (e.g., 125°C), VF decreases slightly, supporting stable conduction in thermally demanding applications.
What package type and lead finish does the MUR420H use?
The MUR420H uses the DO-201AD axial-leaded package with pure tin-plated leads that meet J-STD-002 solderability requirements. The molding compound complies with UL 94V-0 flammability standards, and the device passes JESD201 Class 2 whisker testing. Polarity is marked by a cathode band on the banded end of the package.
How does the MUR420H differ from the MUR420G variant?
The MUR420H differs from the MUR420G primarily in qualification: MUR420H is AEC-Q101 qualified, while MUR420G is not. Both share identical electrical parameters (VRRM = 200 V, IF = 4 A, trr = 25 ns, VF ≤ 0.89 V), DO-201AD package, and RoHS/halogen-free compliance. The "H" suffix signals full automotive qualification - critical for PPAP submissions and safety-related vehicle systems.
MUR420H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 890 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR420H FAQ
1.How can I place an order for MUR420H through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR420H 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 MUR420H reliable?
The price and inventory of MUR420H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR420H is usually 5 days.
3.What payment methods are accepted for MUR420H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR420H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR420H?
MUR420H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR420H 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 MUR420H?
For technical support, including MUR420H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR420H requirements.
6.How does Aetrix verify that MUR420H is sourced from the original manufacturer or authorized distributors?
All MUR420H 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 MUR420H meets industry standards.
7.What is the process for return or replacement of MUR420H?
All MUR420H units undergo pre-shipment inspection (PSI). If there is an issue with MUR420H, 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 MUR420H part is unused and in its original packaging.
Return procedure for MUR420H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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