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Taiwan Semiconductor Corporation MUR340SH
- Part No.:
- MUR340SH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR340SH.pdf
- Description:
- DIODE GEN PURP 400V 3A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,800
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Product details
Overview
MUR340SH from Taiwan Semiconductor is an ultra-fast recovery surface-mount rectifier diode in DO-214AB (SMC) package, rated for 3 A average forward current, 400 V repetitive peak reverse voltage, and 50 ns reverse recovery time. It features glass-passivated junction, AEC-Q101 qualification, and is used in automotive DC-DC converters and freewheeling circuits where fast switching and thermal robustness are required.
For engineers reviewing the MUR340SH datasheet, MUR340SH pinout, MUR340SH application, or MUR340SH equivalent, key selection criteria include its 400 V VRRM, 75 A IFSM, 1.25 V forward voltage at 3 A/25°C, 175°C maximum junction temperature, and DO-214AB mechanical compatibility with automated SMT assembly.
Technical Context
The MUR340SH is a single-die, unidirectional silicon rectifier optimized for high-frequency switching applications. Its ultra-fast 50 ns recovery time minimizes switching losses in DC-DC topologies, while the glass-passivated junction ensures stable performance under thermal cycling and humidity stress.
AEC-Q101 qualification confirms suitability for automotive environments, and the DO-214AB (SMC) package provides low thermal resistance (RθJL = 11°C/W), enabling reliable operation up to 175°C junction temperature without derating in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum non-repetitive reverse blocking voltage; defines safe operating range in snubber and flyback clamp circuits. |
| IF | 3 A - Continuous average forward current at TL = 110°C; supports sustained conduction in automotive power rails. |
| trr | 50 ns - Measured at IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A; enables >100 kHz switching in SMPS designs. |
| VF | 1.25 V @ 3 A, 25°C - Forward voltage drop directly impacts conduction loss and thermal load in high-current paths. |
| RθJL | 11 °C/W - Junction-to-lead thermal resistance; allows direct heatsinking via PCB copper and simplifies thermal design. |
| IFSM | 75 A - Peak surge current rating for 8.3 ms half-sine; withstands inrush and transient overloads in automotive start-stop systems. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-anode/single-cathode configuration. Cathode indicated by molded band on body. Matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential side of circuit; must accommodate 3 A continuous and 75 A surge. |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Marked by cathode band; carries full reverse voltage up to 400 V and defines polarity-sensitive placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47. |
| Glass-passivated junction | Prevents moisture ingress and surface leakage degradation, ensuring stable IR < 10 μA at 400 V/25°C. |
| Ultra-fast 50 ns trr | Reduces reverse recovery charge (Qrr) and associated switching loss in high-frequency converters. |
| DO-214AB (SMC) package | Enables automated pick-and-place, supports 3,000 pcs/reel tape-and-reel delivery, and delivers 11°C/W thermal path. |
Applications
| Automotive DC-DC Converter | Car Lighting Driver |
|---|---|
Use Scenario: High-efficiency 12 V to 5 V/3.3 V buck converter in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Output rectifier handling 3 A continuous current with minimal voltage drop and fast recovery. Use Value: 50 ns trr reduces switching loss by ~35% vs. standard FRDs, improving efficiency above 200 kHz. | Use Scenario: LED headlight constant-current driver with PWM dimming and reverse-polarity protection. IC Role / Device Role / Timing Role: Freewheeling diode across inductive LED driver switch, clamping inductive kickback. Use Value: 400 V VRRM and 75 A IFSM safely absorb transients during rapid PWM turn-off. |
| Snubber Network | Freewheeling Application |
Use Scenario: RCD snubber across MOSFETs in flyback and forward converters to suppress voltage spikes. IC Role / Device Role / Timing Role: Fast-recovery diode conducting snubber capacitor discharge pulse with minimal delay. Use Value: 50 ns trr ensures precise timing alignment with MOSFET turn-off edge, preventing energy loss in resistor. | Use Scenario: Inductive load suppression in automotive solenoid drivers and HVAC actuators. IC Role / Device Role / Timing Role: Unidirectional path for stored inductor energy return during switch deactivation. Use Value: Glass-passivated junction maintains <10 μA leakage at 150°C, ensuring low standby power in always-on systems. |
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 | 400 V VRRM, 3 A IF, 35 ns trr, TO-277 package (smaller footprint than DO-214AB) | Lower trr improves high-frequency efficiency but TO-277 has higher RθJA (50°C/W vs. 11°C/W) | Preferred when board space is constrained and thermal management uses external heatsink. |
| ON Semi MUR340E | Identical VRRM, IF, trr, and DO-214AB package; differs in marking code and minor VF tolerance (1.25 V max vs. 1.30 V max) | No functional difference in automotive or industrial freewheeling use cases | Drop-in alternative if dual-sourcing or second-source validation is required. |
Compared with STTH3L04S and MUR340E, the MUR340SH offers superior thermal performance (RθJL = 11°C/W) and AEC-Q101 certification out-of-box, making it optimal for thermally dense automotive modules where lead-based conduction dominates cooling.
Availability
MUR340SH is available at Aetrix Electronics and suitable for automotive DC-DC converters, car lighting drivers, and snubber networks requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.
Supply support for MUR340SH 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 consumer markets since 1979.
The MUR340SH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-reliability automotive power conversion where fast recovery, thermal resilience, and SMT manufacturability are critical.
FAQ
What is the maximum junction temperature rating for the MUR340SH?
The MUR340SH has a maximum junction temperature (TJ) of +175°C, verified per AEC-Q101 stress testing. This rating allows uninterrupted operation in under-hood automotive environments and high-power-density industrial converters without thermal derating below 110°C lead temperature. The MUR340SH maintains stable electrical parameters-including 10 μA reverse leakage at 400 V-up to this limit.
Is the MUR340SH suitable for automotive applications?
Yes, the MUR340SH is AEC-Q101 qualified and designed for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and humidity testing. Its DO-214AB package, glass-passivated junction, and 175°C TJ rating make it appropriate for engine control units, LED lighting drivers, and DC-DC converters in passenger vehicles and commercial fleets. The MUR340SH is explicitly listed in TSC's automotive-grade rectifier portfolio.
What is the reverse recovery time (trr) of the MUR340SH and how is it measured?
The MUR340SH has a typical reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and IRR = 0.25 A. This value is confirmed in TSC's official datasheet revision B2212 and reflects performance at 25°C ambient. The MUR340SH's 50 ns trr enables efficient operation in switching power supplies operating above 200 kHz, reducing switching losses compared to standard fast recovery diodes.
Does the MUR340SH have RoHS and halogen-free compliance?
Yes, the MUR340SH is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated per J-STD-002. These compliance attributes are documented in TSC's official product specification for the MUR340SH and verified through third-party material declarations. No exemptions apply.
What packaging format is available for the MUR340SH?
The MUR340SH is supplied in DO-214AB (SMC) package and packaged in tape-and-reel format with 3,000 pieces per reel. The reel meets EIA-481 standards and is compatible with standard SMT pick-and-place equipment. The MUR340SH's marking code "MUR340S" appears on the cathode-band side, and the device is moisture sensitivity level 1 (MSL-1), eliminating bake requirements prior to reflow.
MUR340SH 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):
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR340SH FAQ
1.How can I place an order for MUR340SH through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR340SH 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 MUR340SH reliable?
The price and inventory of MUR340SH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR340SH is usually 5 days.
3.What payment methods are accepted for MUR340SH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR340SH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR340SH?
MUR340SH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR340SH 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 MUR340SH?
For technical support, including MUR340SH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR340SH requirements.
6.How does Aetrix verify that MUR340SH is sourced from the original manufacturer or authorized distributors?
All MUR340SH 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 MUR340SH meets industry standards.
7.What is the process for return or replacement of MUR340SH?
All MUR340SH units undergo pre-shipment inspection (PSI). If there is an issue with MUR340SH, 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 MUR340SH part is unused and in its original packaging.
Return procedure for MUR340SH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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