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Taiwan Semiconductor Corporation MUR420SH
- Part No.:
- MUR420SH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR420SH.pdf
- Description:
- DIODE GEN PURP 200V 4A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
MUR420SH from Taiwan Semiconductor is an ultra-fast recovery surface-mount rectifier diode rated for 4 A average forward current and 200 V repetitive peak reverse voltage, with 25 ns reverse recovery time and 0.875 V max forward voltage at 4 A and 25°C. It features glass-passivated junction, AEC-Q101 qualification, and DO-214AB (SMC) package - deployed in automotive DC-DC converters and freewheeling circuits.
For engineers reviewing the MUR420SH datasheet, MUR420SH pinout, MUR420SH application, or MUR420SH equivalent, key selection criteria include its 200 V VRRM, 25 ns trr, AEC-Q101 qualification, thermal resistance (RθJA = 45 °C/W), and suitability for high-efficiency snubber and automotive lighting circuits.
Technical Context
The MUR420SH is a single-die, unidirectional ultra-fast recovery rectifier optimized for high-frequency switching applications where low forward voltage drop and minimal reverse recovery charge are critical. Its 25 ns trr and 65 pF junction capacitance support efficient operation in 100–500 kHz DC-DC topologies.
Designed for automotive-grade reliability, the device uses glass passivation to ensure stable performance across –55°C to +175°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse blocking voltage; defines safe operating limit in flyback or snubber circuits. |
| IF | 4 A - Continuous average forward current at TC = 110°C; determines thermal derating in compact SMC layouts. |
| trr | 25 ns - Ultra-fast reverse recovery time; reduces switching losses and EMI in high-frequency converters. |
| VF (max) | 0.875 V @ 4 A, 25°C - Low conduction loss enabling >92% efficiency in 12 V–48 V automotive DC-DC stages. |
| RθJA | 45 °C/W - Junction-to-ambient thermal resistance; requires ≥25 mm² copper pad for full 4 A rating at 70°C ambient. |
| IFSM | 75 A - Non-repetitive surge current (8.3 ms half-sine); supports cold-crank and load-dump transient immunity. |
Pinout & Package
Package: DO-214AB (SMC) - surface-mount, molded plastic case with matte tin-plated leads, UL 94V-0 rated compound, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); polarity must match PCB silkscreen. |
| Cathode (lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or capacitor positive; reverse voltage applied here during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive power electronics per stress test requirements including HTGB, HTRB, and TC2000. |
| Glass-passivated junction | Prevents surface leakage and corrosion under humid/high-temp conditions; enables 175°C continuous operation. |
| Ultra-fast 25 ns recovery | Reduces turn-off energy loss by >40% vs. standard fast rectifiers; critical for >200 kHz synchronous rectifier replacement. |
| J-STD-020 Level 1 moisture sensitivity | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling. |
Applications
| Automotive DC-DC Converter | LED Headlamp Driver |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 5 V/3.3 V for ADAS sensors and infotainment modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant buck topology. Use Value: 25 ns trr minimizes switching node ringing; 0.875 V VF reduces conduction loss at 4 A load. |
Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS) with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode across boost inductor during MOSFET off-time. Use Value: Low Qrr prevents LED current droop during high-frequency PWM; AEC-Q101 ensures field reliability. |
| Snubber Network | Industrial Power Supply |
Use Scenario: RCD clamp circuit in flyback transformer primary side to suppress voltage spikes. IC Role / Device Role / Timing Role: Fast recovery path for transient energy dissipation. Use Value: 200 V VRRM withstands reflected spike voltages up to 180 V; 25 ns trr avoids snap-off failure. |
Use Scenario: Secondary-side rectification in 24 V industrial PLC power supply with 4 A output. IC Role / Device Role / Timing Role: Main output rectifier in isolated forward converter. Use Value: DO-214AB package allows automated placement; RθJA = 45 °C/W supports natural convection cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L02 | Same 200 V VRRM, 4 A IF, but 35 ns trr and higher VF (0.95 V typ); TO-220AC package. | Requires through-hole mounting and heatsink; less suitable for space-constrained automotive modules. | Choose STTH4L02 only when board-level thermal mass supports TO-220 and 35 ns trr is acceptable. |
| ON Semi MUR420E | Identical electrical specs (200 V, 4 A, 25 ns), same DO-214AB package, but not AEC-Q101 qualified. | Limited to non-automotive industrial use due to lack of automotive qualification and different moisture sensitivity level. | Select MUR420E only for cost-sensitive commercial power supplies where AEC-Q101 is not mandated. |
Compared with STTH4L02 and MUR420E, the MUR420SH uniquely combines AEC-Q101 qualification, 25 ns recovery, and DO-214AB SMT compatibility - making it the only choice for automotive-grade, high-density, high-efficiency rectification requiring zero rework on production lines.
Availability
MUR420SH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and industrial power supplies requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MUR420SH 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 automotive and industrial markets.
The MUR420SH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-frequency, high-reliability power conversion in automotive electronics and harsh-environment industrial systems.
FAQ
What is the maximum junction temperature rating for the MUR420SH?
The MUR420SH has a maximum junction temperature (TJ) of +175°C, verified per absolute maximum ratings table. This rating enables operation in engine-bay-mounted DC-DC converters and other high-ambient environments. Derating begins above 110°C case temperature, and thermal design must maintain TJ ≤ 175°C under worst-case load and ambient conditions. The MUR420SH achieves this via glass-passivated die and low RθJC (8.5 °C/W).
Is the MUR420SH pin-compatible with other devices in the MUR4xSH series?
No - all MUR4xSH variants (e.g., MUR440SH, MUR460SH) share identical DO-214AB (SMC) package and 2-pin anode/cathode configuration, but they are not electrically interchangeable. The MUR420SH is rated for 200 V VRRM, while MUR440SH and MUR460SH require higher reverse voltage margins. Substituting them risks premature breakdown under 200–600 V reverse stress. Always verify VRRM against circuit requirements before using any MUR4xSH part.
Does the MUR420SH meet RoHS and halogen-free standards?
Yes - the MUR420SH is RoHS compliant and halogen-free per IEC 61249-2-21. Lead finish is matte tin, solderable per J-STD-002, and molding compound meets UL 94V-0 flammability rating. These compliance attributes are confirmed in the official Taiwan Semiconductor datasheet revision A2102 and supported by TSC's material declarations.
What is the reverse recovery time (trr) test condition for the MUR420SH?
The MUR420SH reverse recovery time is specified as 25 ns under the condition: IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A, measured per JEDEC standard test circuit (Fig.6 in datasheet). This value is validated at TJ = 25°C and reflects actual behavior in high-frequency switching waveforms - not a typical or average value, but the maximum guaranteed limit.
Can the MUR420SH be used in place of a standard fast recovery diode like FR107?
No - the MUR420SH is not a direct replacement for FR107. While both are 1 A-rated fast diodes, the MUR420SH is a 4 A, 200 V ultra-fast rectifier with 25 ns trr and AEC-Q101 qualification, whereas FR107 is a 1 A, 1000 V standard fast diode with ~500 ns trr. Using MUR420SH in FR107's place may over-specify voltage margin and under-utilize current capability; conversely, substituting FR107 for MUR420SH risks thermal runaway and EMI failure in high-frequency designs.
MUR420SH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- 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:
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR420SH FAQ
1.How can I place an order for MUR420SH through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR420SH 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 MUR420SH reliable?
The price and inventory of MUR420SH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR420SH is usually 5 days.
3.What payment methods are accepted for MUR420SH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR420SH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR420SH?
MUR420SH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR420SH 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 MUR420SH?
For technical support, including MUR420SH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR420SH requirements.
6.How does Aetrix verify that MUR420SH is sourced from the original manufacturer or authorized distributors?
All MUR420SH 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 MUR420SH meets industry standards.
7.What is the process for return or replacement of MUR420SH?
All MUR420SH units undergo pre-shipment inspection (PSI). If there is an issue with MUR420SH, 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 MUR420SH part is unused and in its original packaging.
Return procedure for MUR420SH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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