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Taiwan Semiconductor Corporation MUR340S R7
- Part No.:
- MUR340S R7
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR340S R7.pdf
- Description:
- DIODE GEN PURP 400V 3A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,795
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Product details
Overview
MUR340S from Taiwan Semiconductor is a 3A, 400V ultra-fast recovery surface-mount rectifier in DO-214AB (SMC) package, featuring 50ns reverse recovery time, 1.25V max forward voltage at 3A/25°C, and 75A peak surge current-designed for high-frequency freewheeling and switching-mode power supplies in telecom and computing infrastructure.
For engineers reviewing the MUR340S datasheet, MUR340S pinout, MUR340S application, or MUR340S equivalent, key selection criteria include its 400V VRRM, ultra-fast trr of 50ns, thermal resistance of 11°C/W, and compatibility with automated SMT assembly per J-STD-020 Level 1 moisture sensitivity.
Technical Context
The MUR340S employs a glass-passivated silicon junction optimized for high-speed switching, delivering low stored charge and minimal reverse recovery loss. Its single-die configuration supports unidirectional conduction with cathode-band polarity marking and operates reliably from –55°C to +175°C junction temperature.
Designed for high-frequency DC/DC conversion, it sustains 3A average forward current with derating above 75°C ambient and withstands 8.3ms half-sine surge currents up to 75A without degradation. The device meets RoHS and halogen-free requirements per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse voltage before breakdown; defines safe operating range in flyback and boost topologies |
| IF | 3 A - continuous average forward current at TL = 75°C; sets baseline conduction capability |
| trr | 50 ns - ultra-fast reverse recovery time; reduces switching losses in >100 kHz converters |
| VF (max) | 1.25 V @ 3A, 25°C - forward voltage drop directly impacts conduction loss and thermal design |
| RθJL | 11 °C/W - junction-to-lead thermal resistance; enables direct PCB copper pour thermal management |
| IFSM | 75 A - non-repetitive surge rating for startup/inrush protection in SMPS input stages |
| TJ max | +175 °C - maximum junction temperature; supports high-ambient industrial and telecom deployments |
Pinout & Package
Package: DO-214AB (SMC), surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires adequate copper area for heat dissipation |
| Cathode | Forward current exit / reverse blocking terminal | Marked by black band; ties to output rail or ground return; critical for correct orientation in automated placement |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability under thermal cycling and humidity exposure; eliminates need for conformal coating in industrial environments |
| Ultra-fast 50 ns trr | Reduces reverse recovery energy loss by >40% vs. standard fast rectifiers, improving efficiency in 200–500 kHz SMPS designs |
| J-STD-020 Level 1 moisture sensitivity | Enables direct use in reflow processes without baking; eliminates pre-conditioning delays in high-volume manufacturing |
| Halogen-free & RoHS compliant | Meets IPC-J-STD-609 and EU Directive 2011/65/EU; supports green product certification for telecom OEMs |
Applications
| Telecom AC-DC Front-End | Server VRM Freewheeling Diode |
|---|---|
Use Scenario: Rectifying 380VAC-derived intermediate bus in telecom rectifier modules operating at 200 kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier in active-clamp forward topology, handling 3A continuous load with <50ns turn-off to minimize cross-conduction loss. Use Value: 400V VRRM provides 20% margin over 380VAC-derived 540V peak; 50ns trr cuts diode switching loss by 35% versus 100ns alternatives. | Use Scenario: Freewheeling path in multiphase buck converters supplying CPU core voltage (0.8–1.2V @ 100+ A). IC Role / Device Role / Timing Role: Low-loss synchronous rectifier companion; conducts during low-side FET off-time with minimal reverse recovery tail. Use Value: 1.25V VF at 3A limits conduction loss to <3.75W; DO-214AB footprint allows dense layout adjacent to MOSFETs. |
| Industrial PLC Power Supply | 5G Base Station PSU |
Use Scenario: Input rectification stage in wide-input (85–305VAC) DIN-rail power supply for programmable logic controllers. IC Role / Device Role / Timing Role: Bridge leg diode in PFC front-end, enduring 75A surge during cold-start and sustaining 3A average current at 70°C ambient. Use Value: 175°C TJmax and 11°C/W RθJL enable operation without heatsink at full load in enclosed enclosures. | Use Scenario: Secondary-side rectification in GaN-based 48V–12V intermediate bus converter for massive MIMO radio units. IC Role / Device Role / Timing Role: High-efficiency output diode synchronized with 350 kHz GaN switching, minimizing EMI from slow recovery edges. Use Value: 50ns trr suppresses high-frequency ringing; halogen-free construction complies with 5G equipment material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L04S | 400V VRRM, 3A IF, 55ns trr, TO-277 package (smaller footprint than DO-214AB) | Higher thermal resistance (15°C/W) limits power density in compact layouts | Preferred where board space is constrained but thermal margin exists |
| ON Semi MUR340 | Identical 400V/3A/50ns specs; same DO-214AB package; lead-free matte tin plating | No functional difference; minor packaging variation (tape/reel carrier width) | Drop-in alternative with identical electrical and mechanical behavior |
Compared with STTH3L04S and ON Semi MUR340, the MUR340S offers identical performance to the latter while providing superior thermal resistance (11°C/W vs. 15°C/W) over the STTH3L04S-making it optimal for thermally demanding, high-power-density telecom and server applications.
Availability
MUR340S is available at Aetrix Electronics and suitable for telecom rectifiers, server VRMs, industrial PLC power supplies, and 5G base station PSUs requiring stable component supply across multi-year production cycles.
Supply support for MUR340S 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 global industrial, computing, and communications markets since 1979.
The MUR340S belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency switching power conversion where low recovery loss, robust surge capability, and SMT manufacturability are critical.
FAQ
What is the maximum junction temperature rating for the MUR340S?
The MUR340S has a maximum junction temperature (TJmax) of +175°C, enabling reliable operation in high-ambient environments such as enclosed telecom rectifiers or industrial control cabinets. This rating is validated per JEDEC test conditions and supports extended lifetime at elevated temperatures when used within its derated current envelope. Thermal design must account for RθJL = 11°C/W and PCB copper area.
Does the MUR340S meet RoHS and halogen-free requirements?
Yes, the MUR340S is RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor certifies that the molding compound contains no brominated flame retardants or chlorine-based additives, and all plating meets EU Directive 2011/65/EU. Full compliance documentation is available upon request for MUR340S procurement.
What is the reverse recovery time (trr) of the MUR340S and under what test conditions?
The MUR340S has a typical reverse recovery time (trr) of 50 ns, measured at IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A, per the official Taiwan Semiconductor datasheet. This value is confirmed across production lots and applies to the full MUR340S temperature range (–55°C to +175°C), making it suitable for >100 kHz switching applications.
Is the MUR340S compatible with standard SMT reflow profiles?
Yes, the MUR340S is rated J-STD-020 Level 1 for moisture sensitivity, meaning it can be placed and reflowed using standard Pb-free or SnPb profiles without prior baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB package withstands peak reflow temperatures up to 260°C for 30 seconds.
What is the forward voltage drop (VF) of the MUR340S at 3A and 150°C junction temperature?
At IF = 3 A and TJ = 150°C, the MUR340S exhibits a maximum forward voltage drop of 1.050 V, as specified in the Taiwan Semiconductor datasheet. This lower VF at elevated temperature improves system efficiency during sustained high-load operation compared to devices with higher temperature coefficients.
MUR340S R7 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):
- 400 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR340S R7 FAQ
1.How can I place an order for MUR340S R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR340S R7 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 MUR340S R7 reliable?
The price and inventory of MUR340S R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR340S R7 is usually 5 days.
3.What payment methods are accepted for MUR340S R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR340S R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR340S R7?
MUR340S R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR340S R7 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 MUR340S R7?
For technical support, including MUR340S R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR340S R7 requirements.
6.How does Aetrix verify that MUR340S R7 is sourced from the original manufacturer or authorized distributors?
All MUR340S R7 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 MUR340S R7 meets industry standards.
7.What is the process for return or replacement of MUR340S R7?
All MUR340S R7 units undergo pre-shipment inspection (PSI). If there is an issue with MUR340S R7, 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 MUR340S R7 part is unused and in its original packaging.
Return procedure for MUR340S R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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