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Taiwan Semiconductor Corporation MUR305SBH
- Part No.:
- MUR305SBH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
MUR305SBH.pdf
- Description:
- 25NS, 3A, 50V, ULTRA FAST RECOVE
- Quantity:
- Payment:
- Shipping:
Inventory:5,970
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Product details
Overview
MUR305SBH from Taiwan Semiconductor is an ultra-fast recovery surface-mount power rectifier in DO-214AA (SMB) package, rated for 3 A average forward current, 50 V repetitive peak reverse voltage, and 25 ns maximum reverse recovery time; it serves as a freewheeling or snubber diode in automotive DC-DC converters and LED lighting circuits.
For engineers reviewing the MUR305SBH datasheet, MUR305SBH pinout, MUR305SBH application, or MUR305SBH equivalent, key selection criteria include its AEC-Q101 qualification, 175 °C max junction temperature, glass-passivated junction, moisture sensitivity level 1, and TJ-dependent forward voltage drop under 0.90 V at 3 A and 25 °C.
Technical Context
The MUR305SBH is a single-die, unidirectional silicon rectifier optimized for high-frequency switching applications where low reverse recovery charge and fast turn-off are critical to minimize switching losses. Its ultra-fast trr ≤ 25 ns and low CJ = 45 pF support operation in 100 kHz–1 MHz DC-DC topologies.
Thermally, it features RθJL = 42 °C/W and RθJA = 76 °C/W on a 10 mm × 10 mm Cu pad, enabling reliable 3 A conduction at ambient temperatures up to 125 °C when derated per curve Fig.1; polarity is marked by a cathode band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum reverse blocking voltage before breakdown; defines usable input voltage range in flyback or buck snubbers. |
| IF | 3 A - Continuous average forward current at TL = 100 °C; supports mid-power automotive loads without forced cooling. |
| trr | ≤ 25 ns - Ultra-fast reverse recovery time; reduces switching loss and EMI in high-frequency converters. |
| VF @ 3 A, 25 °C | ≤ 0.90 V - Low forward voltage drop improves efficiency and reduces thermal stress vs. standard rectifiers. |
| TJ max | +175 °C - High junction temperature rating enables operation in under-hood automotive environments. |
| RθJL | 42 °C/W - Junction-to-lead thermal resistance; allows direct PCB copper pad heat sinking without heatsink. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, cathode indicated by band. Weight: 0.110 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in boost/flyback); must handle 75 A surge (IFSM). |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to higher-potential rail; blocks 50 V reverse bias with ≤ 5 µA leakage at 25 °C. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47. |
| Glass passivated junction | Enhances humidity resistance and long-term stability of reverse leakage and breakdown characteristics. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry pack handling. |
| Ultra-fast 25 ns trr | Enables >500 kHz switching in isolated DC-DC converters while maintaining <1% recovery loss. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for green automotive supply chains. |
Applications
| Automotive DC-DC Converter | LED Headlamp Driver |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 5–8 V for infotainment modules. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck topology, conducting during low-side switch off-time. Use Value: 25 ns trr minimizes reverse recovery spikes that cause MOSFET shoot-through and EMI in 300–500 kHz designs. | Use Scenario: Constant-current driver for high-brightness automotive headlamps with PWM dimming. IC Role / Device Role / Timing Role: Snubber diode across inductive LED driver choke to clamp voltage spikes during PWM turn-off. Use Value: 50 V VRRM and 75 A IFSM safely absorb energy from 12 V system transients without avalanche stress. |
| Engine Control Unit Power Supply | Body Control Module Snubber |
Use Scenario: Input rectification and hold-up in 5 V/3.3 V LDO pre-regulator stage. IC Role / Device Role / Timing Role: Output rectifier in flyback auxiliary winding supplying MCU core voltage. Use Value: 175 °C TJ max ensures uninterrupted operation near hot engine compartments where ambient reaches 105 °C. | Use Scenario: Protection of relay drivers and window motor H-bridges against inductive kickback. IC Role / Device Role / Timing Role: Clamp diode across relay coil or motor winding to limit voltage overshoot during de-energization. Use Value: Glass passivation and AEC-Q101 qualification guarantee stable leakage (<150 µA at 150 °C) over 15-year vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L05S | Same DO-214AA package, 50 V VRRM, but trr = 35 ns (vs. 25 ns); VF = 0.87 V @ 3 A, 25 °C. | Higher recovery time increases switching loss in >400 kHz designs; less suitable for compact LED drivers. | Select MUR305SBH when trr-critical timing or lowest EMI is required. |
| ON Semi MUR305E | Identical electrical specs (50 V, 3 A, 25 ns), but not AEC-Q101 qualified; MSL level 2 vs. level 1. | Not approved for automotive safety-critical modules; requires bake before reflow. | Choose MUR305SBH for production automotive programs requiring zero-process deviation. |
Compared with STTH3L05S and MUR305E, the MUR305SBH delivers superior high-frequency performance due to its 25 ns trr and automotive-grade process controls, making it the preferred choice for space-constrained, thermally demanding, and safety-compliant vehicle subsystems.
Availability
MUR305SBH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED lighting systems, and body control module snubbers requiring stable component supply across multi-year production cycles.
Supply support for MUR305SBH 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 devices, rectifiers, and protection components.
The MUR305SBH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier family, engineered specifically for high-reliability automotive power conversion and inductive load management.
FAQ
What is the maximum junction temperature rating for the MUR305SBH?
The MUR305SBH has a maximum junction temperature (TJ) of +175 °C, verified per absolute maximum ratings table. This rating allows continuous operation in under-hood automotive environments where ambient temperatures exceed 105 °C, provided thermal design meets RθJL = 42 °C/W limits. The MUR305SBH maintains stable electrical parameters up to this limit, as confirmed in thermal performance data.
Is the MUR305SBH pin-compatible with other DO-214AA rectifiers like MUR305E?
Yes, the MUR305SBH uses the standard DO-214AA (SMB) package with identical mechanical dimensions and anode/cathode terminal layout as MUR305E and STTH3L05S. However, MUR305SBH adds AEC-Q101 qualification and moisture sensitivity level 1, which are not present in MUR305E. The MUR305SBH remains a direct physical replacement but offers enhanced automotive reliability.
What is the reverse recovery time (trr) specification for the MUR305SBH?
The MUR305SBH has a maximum reverse recovery time (trr) of 25 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is guaranteed across temperature and is critical for minimizing switching loss in high-frequency DC-DC converters. The MUR305SBH achieves this via optimized carrier lifetime control in its ultra-fast silicon structure.
Does the MUR305SBH meet automotive qualification standards?
Yes, the MUR305SBH is explicitly AEC-Q101 qualified, as stated in its official datasheet revision A2102. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and electrostatic discharge per JESD22 standards. This makes the MUR305SBH suitable for automotive powertrain, chassis, and body electronics where component-level reliability is mandated.
What is the forward voltage drop of the MUR305SBH at 3 A and 25 °C?
The MUR305SBH exhibits a maximum forward voltage (VF) of 0.90 V at 3 A and 25 °C, per electrical specifications table. At elevated junction temperatures (150 °C), VF drops to ≤ 0.73 V due to negative temperature coefficient of silicon. This low VF directly improves system efficiency and reduces thermal load compared to standard recovery rectifiers.
MUR305SBH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 45pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR305SBH FAQ
1.How can I place an order for MUR305SBH through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR305SBH 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 MUR305SBH reliable?
The price and inventory of MUR305SBH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR305SBH is usually 5 days.
3.What payment methods are accepted for MUR305SBH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR305SBH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR305SBH?
MUR305SBH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR305SBH 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 MUR305SBH?
For technical support, including MUR305SBH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR305SBH requirements.
6.How does Aetrix verify that MUR305SBH is sourced from the original manufacturer or authorized distributors?
All MUR305SBH 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 MUR305SBH meets industry standards.
7.What is the process for return or replacement of MUR305SBH?
All MUR305SBH units undergo pre-shipment inspection (PSI). If there is an issue with MUR305SBH, 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 MUR305SBH part is unused and in its original packaging.
Return procedure for MUR305SBH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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