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Taiwan Semiconductor Corporation MUR440SH
- Part No.:
- MUR440SH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR440SH.pdf
- Description:
- DIODE GEN PURP 400V 4A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
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Product details
Overview
MUR440SH from Taiwan Semiconductor is an ultra-fast recovery surface-mount rectifier diode rated for 4 A average forward current and 400 V repetitive peak reverse voltage, with 50 ns reverse recovery time and 1.25 V max forward voltage at 4 A and 25°C, used in automotive DC-DC converters and snubber circuits.
For engineers reviewing the MUR440SH datasheet, MUR440SH pinout, MUR440SH application, or MUR440SH equivalent, key selection criteria include its DO-214AB (SMC) package, AEC-Q101 qualification, glass-passivated junction, 175°C max junction temperature, and 75 A non-repetitive surge rating.
Technical Context
The MUR440SH employs a single-die silicon PN junction with glass passivation for enhanced reliability and moisture resistance. Its ultra-fast 50 ns trr enables high-frequency switching in DC-DC topologies where reverse recovery losses must be minimized.
Thermally, it features a junction-to-case resistance of 8.5°C/W and junction-to-ambient resistance of 45°C/W in DO-214AB (SMC) package, supporting sustained 4 A conduction at elevated ambient temperatures when properly heatsinked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - maximum repetitive reverse blocking voltage; defines safe operating range in flyback or freewheeling paths |
| IF(AV) | 4 A - continuous forward current rating at TC = 110°C; determines minimum heatsinking requirements |
| trr | 50 ns - ultra-fast reverse recovery time; reduces switching loss and EMI in >100 kHz converters |
| VF(max) | 1.25 V @ 4 A, 25°C - forward voltage drop directly impacts conduction loss and thermal design |
| IFSM | 75 A - peak surge current handling for 8.3 ms half-sine; supports inrush and fault-current tolerance |
| TJ(max) | 175°C - maximum junction temperature; enables operation in under-hood automotive environments |
| RθJC | 8.5°C/W - thermal resistance from junction to case; critical for calculating case temperature rise under load |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, single-anode/single-cathode configuration with cathode band marking. Matte tin-plated leads, UL 94V-0 molding compound, JESD201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of circuit; polarity-sensitive in series rectification |
| Cathode | Forward current exit point | Marked by band on package; connects to higher-potential node in standard rectifier orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and UHAST |
| Glass passivated junction | Prevents moisture ingress and surface leakage, improving long-term stability in humid environments |
| Ultra-fast 50 ns trr | Enables efficient operation in high-frequency SMPS without excessive switching loss or ringing |
| DO-214AB (SMC) package | Standardized SMT footprint compatible with automated pick-and-place; supports 4 A with adequate PCB copper area |
| Level 1 moisture sensitivity | No bake requirement prior to reflow; simplifies manufacturing and reduces process risk |
Applications
| Automotive DC-DC Converter | Car LED Lighting Supply |
|---|---|
Use Scenario: High-efficiency 12 V to 5 V/3.3 V buck-derived converter in engine control units and ADAS modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant topology, conducting during low-side switch off-time. Use Value: 50 ns trr minimizes reverse recovery loss, enabling >92% efficiency at 300 kHz switching frequency. | Use Scenario: Constant-current driver for high-brightness LED headlamps and DRLs with PWM dimming. IC Role / Device Role / Timing Role: Freewheeling diode across inductive LED choke during PWM off-cycle. Use Value: 175°C TJ(max) and AEC-Q101 qualification ensure stable operation under hood temperatures up to 125°C ambient. |
| Snubber Network | Freewheeling in Solenoid Drivers |
Use Scenario: RCD snubber across MOSFETs in automotive power distribution modules to suppress voltage spikes. IC Role / Device Role / Timing Role: Fast-recovery clamp diode that conducts only during transient voltage overshoot events. Use Value: Low CJ (65 pF) and fast trr reduce snubber energy dissipation and improve transient response fidelity. | Use Scenario: Inductive load management in transmission shift solenoids and fuel injector drivers. IC Role / Device Role / Timing Role: Freewheeling path for stored inductor energy when drive FET turns off. Use Value: 75 A IFSM withstands repeated inductive kickback surges without degradation over 10-year vehicle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04DJF | 400 V VRRM, 4 A IF, 40 ns trr, TO-277A package (smaller footprint than DO-214AB) | Lower trr improves high-frequency efficiency but requires revised pad layout | Preferred where board space is constrained and trr < 45 ns is required |
| ON Semi MUR440E | Same VRRM/IF/trr specs, DO-214AB package, but not AEC-Q101 qualified | Lacks automotive qualification; unsuitable for under-hood use per OEM requirements | Select only for industrial or consumer applications where AEC-Q101 is not mandated |
Compared with STTH4R04DJF and MUR440E, the MUR440SH uniquely combines AEC-Q101 qualification, 50 ns trr, and DO-214AB compatibility-making it the default choice for automotive-grade 400 V rectification where qualification and legacy footprint retention are mandatory.
Availability
MUR440SH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED lighting systems, and snubber networks requiring stable component supply across production lifecycles.
Supply support for MUR440SH 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 automotive, industrial, and computing markets since 1979.
The MUR440SH belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-reliability automotive power conversion where fast recovery, thermal robustness, and AEC-Q101 compliance are non-negotiable.
FAQ
What is the maximum junction temperature rating for the MUR440SH?
The MUR440SH has a maximum junction temperature (TJ(max)) of +175°C, verified per AEC-Q101 stress testing. This rating allows reliable operation in under-hood automotive environments where ambient temperatures reach 125°C, provided thermal design maintains junction temperature below this limit. The MUR440SH's RθJC of 8.5°C/W enables effective heat transfer to the PCB or heatsink.
Is the MUR440SH AEC-Q101 qualified?
Yes, the MUR440SH is explicitly AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor datasheet revision A2102. This qualification covers temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress test (UHAST), making the MUR440SH suitable for automotive powertrain and body electronics applications.
What is the reverse recovery time (trr) of the MUR440SH and how is it measured?
The MUR440SH has a reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per the JEDEC standard test circuit. This value is specified for both MUR440SH and MUR460SH variants and reflects the device's ultra-fast switching capability essential for high-frequency DC-DC converters.
What package does the MUR440SH use and what are its mechanical features?
The MUR440SH uses the DO-214AB (SMC) surface-mount package. Key mechanical features include matte tin-plated leads compliant with J-STD-002, UL 94V-0 flammability-rated molding compound, polarity indicated by cathode band, and JESD201 Class 2 whisker resistance. Its weight is approximately 0.250 g.
How does the forward voltage of the MUR440SH compare at different junction temperatures?
At 4 A and 25°C, the MUR440SH's forward voltage is ≤1.25 V; at 4 A and 150°C, it drops to ≤1.05 V. This negative temperature coefficient improves thermal stability in parallel configurations and reduces conduction loss at elevated operating temperatures-critical for automotive under-hood applications where the MUR440SH operates near its 175°C TJ(max).
MUR440SH 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):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR440SH FAQ
1.How can I place an order for MUR440SH through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR440SH 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 MUR440SH reliable?
The price and inventory of MUR440SH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR440SH is usually 5 days.
3.What payment methods are accepted for MUR440SH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR440SH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR440SH?
MUR440SH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR440SH 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 MUR440SH?
For technical support, including MUR440SH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR440SH requirements.
6.How does Aetrix verify that MUR440SH is sourced from the original manufacturer or authorized distributors?
All MUR440SH 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 MUR440SH meets industry standards.
7.What is the process for return or replacement of MUR440SH?
All MUR440SH units undergo pre-shipment inspection (PSI). If there is an issue with MUR440SH, 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 MUR440SH part is unused and in its original packaging.
Return procedure for MUR440SH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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