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Taiwan Semiconductor Corporation MUR320SB
- Part No.:
- MUR320SB
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
MUR320SB.pdf
- Description:
- DIODE GEN PURP 200V 3A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
MUR320SB from Taiwan Semiconductor is an ultra-fast recovery surface-mount power rectifier with 200 V repetitive peak reverse voltage (VRRM), 3 A average forward current (IF), and 25 ns reverse recovery time (trr), designed for high-efficiency switching mode power supplies in consumer electronics such as TVs and monitors.
For engineers reviewing the MUR320SB datasheet, MUR320SB pinout, MUR320SB application, or MUR320SB equivalent, key selection criteria include its DO-214AA (SMB) package, 75 A surge rating (IFSM), 175 °C maximum junction temperature, and low forward voltage drop of 0.90 V at 3.0 A and 25 °C.
Technical Context
The MUR320SB employs a single-die, glass-passivated silicon junction optimized for fast switching in high-frequency DC/DC and AC/DC converters. Its ultra-fast recovery (trr ≤ 25 ns) minimizes switching losses and reduces EMI generation during turn-off transitions.
Thermally, it features a junction-to-lead resistance (RθJL) of 42 °C/W and junction-to-ambient resistance (RθJA) of 76 °C/W when mounted on a 10 mm × 10 mm copper pad - enabling reliable operation up to 175 °C junction temperature under sustained 3 A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input rectification in 115/230 VAC SMPS front-ends with sufficient margin against line transients |
| IF | 3 A continuous - delivers stable output power in compact adapters and auxiliary rails without forced cooling |
| trr | ≤ 25 ns - enables >100 kHz switching frequencies while limiting reverse recovery loss and diode ringing |
| VF @ 3 A, 25 °C | 0.90 V max - reduces conduction loss to <2.7 W at full load, improving overall efficiency |
| RθJA | 76 °C/W - allows thermal design with minimal PCB copper area for cost-sensitive consumer applications |
| IFSM | 75 A (8.3 ms half-sine) - withstands inrush currents during cold-start in offline power supplies |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.110 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to AC input or switching node; must handle full surge current and thermal stress |
| Cathode | Output current exit point | Connected to bulk capacitor or output rail; polarity marking ensures correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and moisture resistance per J-STD-020 Level 1 MSL rating |
| Ultra-fast recovery (trr ≤ 25 ns) | Reduces switching loss and EMI in high-frequency SMPS designs above 100 kHz |
| DO-214AA (SMB) package | Enables automated pick-and-place assembly and meets IPC-7351B footprint standards |
| RoHS & halogen-free compliance | Fulfills IEC 61249-2-21 and EU RoHS Directive requirements for green electronics manufacturing |
Applications
| TV Power Supply | Monitor SMPS |
|---|---|
Use Scenario: Primary-side rectification in 50–200 W off-line flyback converters powering LCD/LED backlight and logic rails. IC Role / Device Role / Timing Role: Ultra-fast power rectifier handling 100 kHz switching with minimal reverse recovery loss. Use Value: Enables compact heatsink-free design due to low VF (0.90 V) and high tjmax (175 °C). | Use Scenario: Output rectification in dual-rail (±12 V, +5 V) forward converters for display control boards. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode with fast trr to suppress voltage spikes during MOSFET turn-on. Use Value: Reduces snubber component count and improves cross-regulation via tight recovery consistency. |
| Laptop Adapter | Set-Top Box PSU |
Use Scenario: Bridge rectifier replacement in compact 65 W quasi-resonant adapters requiring low profile and high efficiency. IC Role / Device Role / Timing Role: Single-phase rectifier operating at elevated ambient temperatures (>60 °C). Use Value: Maintains <5 µA leakage at 150 °C, preventing standby power drift and thermal runaway. | Use Scenario: Standby power supply rectification in multi-output 12 V/5 V/3.3 V PSUs with tight no-load regulation. IC Role / Device Role / Timing Role: Low-leakage (≤150 µA at 150 °C) rectifier minimizing quiescent current in always-on circuits. Use Value: Supports Energy Star 6.0 and EU CoC Tier 2 standby power targets (<0.5 W). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L06S | VRRM = 600 V, trr = 35 ns, IF = 3 A, same DO-214AA package | Higher voltage rating suits universal-input PFC stages; slower recovery increases switching loss at >100 kHz | Select when higher transient immunity is required and switching frequency is ≤65 kHz |
| ES3D | VRRM = 200 V, trr = 35 ns, IF = 3 A, DO-214AA, VF = 0.95 V max @ 3 A | Near-identical voltage/current specs but slower recovery and higher forward drop reduce efficiency in high-frequency designs | Acceptable for cost-sensitive legacy designs where trr ≤ 35 ns is acceptable |
Compared with STTH3L06S and ES3D, the MUR320SB offers the fastest recovery (≤25 ns) and lowest VF (0.90 V) among DO-214AA 200 V rectifiers, making it optimal for high-efficiency, high-frequency SMPS where thermal headroom and EMI control are critical.
Availability
MUR320SB is available at Aetrix Electronics and suitable for switching mode power supplies, TV/monitor main power rails, and laptop adapter designs requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for MUR320SB 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 power electronics and industrial markets since 1979.
The MUR320SB belongs to TSC's MUR3xSB ultra-fast rectifier family, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC conversion in consumer and computing power supplies.
FAQ
What is the maximum junction temperature rating for the MUR320SB?
The MUR320SB has a maximum junction temperature (TJ) of +175 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet. This rating allows sustained operation at full 3 A load in thermally constrained environments, provided PCB thermal design meets the specified RθJA = 76 °C/W condition. The MUR320SB maintains stable leakage and forward characteristics up to this limit.
Does the MUR320SB have a defined reverse recovery time, and what test conditions apply?
Yes, the MUR320SB specifies a maximum reverse recovery time (trr) of 25 ns, measured under the condition: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A. This value is confirmed in the Electrical Specifications table of the Taiwan Semiconductor MUR305SB–MUR320SB datasheet (Version C2102). It reflects performance at room temperature and is critical for high-frequency SMPS layout and loss estimation.
What is the forward voltage drop of the MUR320SB at rated current and temperature?
The MUR320SB exhibits a maximum forward voltage (VF) of 0.90 V at IF = 3.0 A and TJ = 25 °C, per the Electrical Specifications table. At elevated junction temperature (150 °C), VF drops to 0.73 V max. These values directly impact conduction loss calculation - e.g., ~2.7 W loss at 3 A and 25 °C - and inform thermal design decisions for the MUR320SB.
Is the MUR320SB compliant with RoHS and halogen-free standards?
Yes, the MUR320SB is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. The device uses matte tin-plated leads and a UL 94V-0 molding compound, satisfying environmental compliance requirements for commercial and consumer electronics manufacturing in global markets.
What package type does the MUR320SB use, and is it compatible with standard SMT processes?
The MUR320SB uses the DO-214AA (SMB) surface-mount package, fully compatible with automated placement and reflow soldering per J-STD-002. Its moisture sensitivity level is rated J-STD-020 Level 1, meaning it can be stored indefinitely at ambient conditions without baking. The cathode band provides unambiguous polarity identification for accurate PCB assembly of the MUR320SB.
MUR320SB 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):
- 200 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 @ 200 V
- Capacitance @ Vr, F:
- 45pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR320SB FAQ
1.How can I place an order for MUR320SB through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR320SB 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 MUR320SB reliable?
The price and inventory of MUR320SB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR320SB is usually 5 days.
3.What payment methods are accepted for MUR320SB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR320SB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR320SB?
MUR320SB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR320SB 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 MUR320SB?
For technical support, including MUR320SB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR320SB requirements.
6.How does Aetrix verify that MUR320SB is sourced from the original manufacturer or authorized distributors?
All MUR320SB 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 MUR320SB meets industry standards.
7.What is the process for return or replacement of MUR320SB?
All MUR320SB units undergo pre-shipment inspection (PSI). If there is an issue with MUR320SB, 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 MUR320SB part is unused and in its original packaging.
Return procedure for MUR320SB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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