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Taiwan Semiconductor Corporation MUR4L40
- Part No.:
- MUR4L40
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
MUR4L40.pdf
- Description:
- DIODE GEN PURP 400V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:8,727
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Product details
Overview
MUR4L40 from Taiwan Semiconductor is an ultra-fast recovery rectifier diode rated for 4 A average forward current and 400 V repetitive peak reverse voltage, with 50 ns reverse recovery time and 1.28 V forward voltage at 4 A and 25°C, used in high-frequency switching power supplies and freewheeling paths.
For engineers reviewing the MUR4L40 datasheet, MUR4L40 pinout, MUR4L40 application, or MUR4L40 equivalent, key selection criteria include its DO-201AD package, 125 A surge rating, 175°C max junction temperature, glass-passivated junction, and AEC-Q101 qualification option (MUR4L40H).
Technical Context
The MUR4L40 operates as a single-die, unidirectional, silicon planar junction rectifier with ultra-fast recovery optimized for high-efficiency DC–DC converters and SMPS topologies. Its 50 ns trr and low Qrr support high-frequency operation up to several hundred kHz while minimizing switching losses.
Thermally, it features a junction-to-lead resistance of 15°C/W and junction-to-ambient resistance of 36°C/W in the DO-201AD package, enabling reliable conduction at 4 A continuous with proper PCB copper area or heatsinking. The cathode-band polarity marking and pure tin-plated leads comply with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse blocking voltage; defines safe operating ceiling in flyback or boost output stages |
| IF(AV) | 4 A - Continuous average forward current at TA = 75°C; determines steady-state power handling in rectification paths |
| trr | 50 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient operation in 100–500 kHz SMPS designs |
| VF | 1.28 V max at IF = 4 A, TJ = 25°C - Directly impacts conduction loss and thermal rise in high-current output rails |
| IR | 10 µA max at VR = 400 V, TJ = 25°C - Low leakage preserves efficiency in high-impedance hold-up or sensing circuits |
| RθJL | 15 °C/W - Thermal resistance from junction to lead; informs minimum pad copper area needed for 4 A continuous operation |
| TJ(max) | +175 °C - Maximum allowable junction temperature; supports operation in under-hood automotive or enclosed industrial environments |
Pinout & Package
Package: DO-201AD - Axial-leaded, molded plastic case with cathode band marking; 9.5 mm body length, 5.6 mm diameter, 1.3 mm lead diameter; UL 94V-0 rated, RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to AC input or switch node side in bridge/freewheeling configurations; requires adequate trace width for 4 A RMS |
| 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 during reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (50 ns) | Reduces switching loss and EMI generation in high-frequency converters, enabling smaller output filters |
| Glass passivated junction | Enhances long-term reliability and moisture resistance in humid or thermally cycled environments |
| AEC-Q101 qualified variant available (MUR4L40H) | Validated for automotive powertrain and body electronics applications requiring stress-tested component reliability |
| Pure tin-plated leads | Ensures consistent solder wetting and intermetallic formation per J-STD-002, supporting automated assembly |
Applications
| DC–DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side synchronous rectification in isolated 48 V–12 V buck-derived converters. IC Role / Device Role / Timing Role: Ultra-fast rectifier replacing Schottky diodes where higher reverse voltage margin is required. Use Value: Enables 400 V blocking with 50 ns recovery-reducing voltage overshoot and snubber losses versus standard FRDs. | Use Scenario: Output stage rectification in 3-phase motor drive inverters with regenerative braking. IC Role / Device Role / Timing Role: Freewheeling diode across IGBTs to clamp inductive kickback during turn-off. Use Value: 125 A surge rating and 175°C junction tolerance sustain repeated transient energy absorption without thermal runaway. |
| SMPS Power Supply | Automotive Onboard Charger |
Use Scenario: Input PFC boost diode in universal-input 300 W AC–DC front-end. IC Role / Device Role / Timing Role: Fast-recovery boost rectifier handling 50/60 Hz + high-frequency ripple currents. Use Value: 1.28 V VF at 4 A balances conduction loss vs. thermal design complexity in compact enclosures. | Use Scenario: Isolation boundary rectification in bidirectional OBC modules for EVs. IC Role / Device Role / Timing Role: High-reliability output rectifier in AEC-Q101-compliant (MUR4L40H) 6.6 kW OBC designs. Use Value: Glass passivation and whisker-tested leads ensure long-term stability under vibration, thermal cycling, and humidity exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06D | 600 V VRRM, 55 ns trr, 1.7 V VF @ 4 A, TO-220AC package | Higher voltage rating but larger footprint and higher VF; suited for 600 V systems with heatsink allowance | Select when >400 V blocking or TO-220 mounting is required; not drop-in due to package and VF difference |
| ES4D | 400 V VRRM, 35 ns trr, 1.25 V VF @ 4 A, DO-214AA (SMA) package | Smaller surface-mount package, faster recovery, but lower surge rating (60 A IFSM) and no AEC-Q101 option | Prefer for space-constrained SMT layouts where 50 ns trr is sufficient and automotive qualification is not mandatory |
Compared with STTH4L06D and ES4D, the MUR4L40 offers optimal balance of 400 V rating, 50 ns speed, axial DO-201AD fit for through-hole prototyping and high-reliability industrial use, and optional AEC-Q101 qualification-making it distinct for cost-sensitive, medium-power, and automotive-adjacent designs.
Availability
MUR4L40 is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and automotive onboard chargers requiring stable component supply, long-lifecycle availability, and RoHS/halogen-free compliance.
Supply support for MUR4L40 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, MOSFETs, and LED drivers.
The MUR4L40 belongs to TSC's MUR4Lx ultra-fast rectifier family, engineered for high-efficiency, high-reliability power conversion in industrial, computing, and automotive-grade power supplies.
FAQ
What is the maximum junction temperature rating for the MUR4L40?
The MUR4L40 has a maximum junction temperature (TJ(max)) of +175°C, allowing operation in high-ambient environments such as enclosed power supplies or under-hood automotive locations. This rating is validated per JEDEC test conditions and supports derating curves up to 75°C ambient at full 4 A load when mounted on adequate copper area.
Does the MUR4L40 have AEC-Q101 qualification?
The base MUR4L40 is not AEC-Q101 qualified, but the MUR4L40H variant is explicitly qualified per AEC-Q101. The "H" suffix denotes automotive-grade stress testing including HTGB, TC, and H3TRB. For automotive applications, specify MUR4L40H-not MUR4L40-to ensure compliance.
What is the reverse recovery time (trr) specification for the MUR4L40?
The MUR4L40 has a typical reverse recovery time (trr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A at 25°C. This value is confirmed in the official TSC datasheet Version C2308 and reflects its ultra-fast switching capability for high-frequency SMPS designs.
What package type does the MUR4L40 use, and what are its key mechanical features?
The MUR4L40 uses the DO-201AD axial package: 9.5 mm body length, 5.6 mm diameter, pure tin-plated leads, cathode band polarity marking, and UL 94V-0 flammability rating. Its 1.20 g weight and JEDEC-compliant outline support manual and wave-solder assembly with verified J-STD-002 solderability.
How does the forward voltage (VF) of the MUR4L40 compare to the MUR4L20 and MUR4L60 variants?
The MUR4L40 has a maximum VF of 1.28 V at 4 A and 25°C, versus 0.89 V for the MUR4L20 and same 1.28 V for the MUR4L60. This reflects the trade-off between higher voltage rating and forward conduction loss-MUR4L40 delivers optimal VF for 400 V-class applications where MUR4L20 lacks blocking margin and MUR4L60 adds unnecessary voltage overhead.
MUR4L40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.28 V @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- 65pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR4L40 FAQ
1.How can I place an order for MUR4L40 through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR4L40 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 MUR4L40 reliable?
The price and inventory of MUR4L40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR4L40 is usually 5 days.
3.What payment methods are accepted for MUR4L40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR4L40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR4L40?
MUR4L40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR4L40 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 MUR4L40?
For technical support, including MUR4L40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR4L40 requirements.
6.How does Aetrix verify that MUR4L40 is sourced from the original manufacturer or authorized distributors?
All MUR4L40 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 MUR4L40 meets industry standards.
7.What is the process for return or replacement of MUR4L40?
All MUR4L40 units undergo pre-shipment inspection (PSI). If there is an issue with MUR4L40, 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 MUR4L40 part is unused and in its original packaging.
Return procedure for MUR4L40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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