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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation MUR315SB

Name: MUR315SB
Brand: Taiwan Semiconductor Corporation
SKU: MUR315SB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR315SB

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: MUR315SB.pdf

Description:: 25NS, 3A, 150V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:5,990

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Product details

Overview

MUR315SB from Taiwan Semiconductor is a 3A, 150V ultra-fast recovery surface-mount power rectifier in DO-214AA (SMB) package, featuring 25ns reverse recovery time, 0.86V forward voltage at 3A/25°C, and 75A surge current capability; it serves as the output rectifier in high-frequency switching mode power supplies for consumer electronics.

For engineers reviewing the MUR315SB datasheet, MUR315SB pinout, MUR315SB application, or MUR315SB equivalent, key selection criteria include V_RRM = 150V, I_F = 3A, t_rr ≤ 25ns, thermal resistance R_θJA = 76°C/W, and DO-214AA mechanical compatibility with automated SMT assembly lines.

Technical Context

The MUR315SB uses a single-die, glass-passivated silicon junction optimized for high-efficiency SMPS operation. Its ultra-fast recovery (t_rr ≤ 25ns) minimizes switching losses during turn-off, while the 150V V_RRM rating targets mid-voltage secondary-side rectification in adapters and displays.

Thermal performance is defined for PCB mounting on a 10mm × 10mm copper pad: R_θJL = 42°C/W and R_θJC = 45°C/W enable reliable operation up to T_J = 175°C, with moisture sensitivity level 1 per J-STD-020 ensuring robust reflow compatibility.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	150 V - Peak reverse blocking voltage; defines maximum DC or AC peak voltage the device withstands in off-state without breakdown.
I_F	3 A - Continuous average forward current; sets steady-state conduction capability under thermal derating constraints.
t_rr	≤25 ns - Reverse recovery time; determines minimum dead-time requirement and switching loss in high-frequency converters.
V_F	0.86 V @ 3A, 25°C - Forward voltage drop; directly impacts conduction loss and thermal load at rated current.
R_θJA	76 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise on standard 10mm × 10mm Cu pad PCB layout.
I_FSM	75 A - Non-repetitive surge current (8.3ms half-sine); supports inrush and transient overload tolerance in power supplies.
C_J	45 pF @ 1MHz, 4V - Junction capacitance; influences high-frequency switching noise and EMI filter design.

Pinout & Package

Package: DO-214AA (SMB), surface-mount, cathode indicated by band, matte tin-plated leads, UL 94V-0 molding compound, weight ≈0.110g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to transformer secondary or switch node; must handle full 3A average and 75A surge currents.
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail; polarity band identifies this terminal; critical for correct orientation in automated placement.

Key Features

Feature	Design Value
Glass passivated chip junction	Enhances long-term reliability and humidity resistance in industrial and consumer environments without hermetic sealing.
Ultra-fast recovery (t_rr ≤ 25ns)	Reduces switching losses and EMI generation in 100–500 kHz SMPS designs, enabling higher efficiency than standard fast rectifiers.
Moisture sensitivity level 1	Eliminates bake requirements before reflow soldering, supporting direct use in high-volume automated SMT lines.
RoHS and halogen-free compliance	Meets IEC 61249-2-21 and global environmental regulations for consumer electronics and display products.

Applications

SMPS Output Rectification	AC-DC Adapter Secondary Side
Use Scenario: High-frequency flyback or forward converter output stage delivering 12–24V/3A to downstream circuitry. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output. Use Value: 25ns t_rr and low V_F minimize conduction and switching losses, improving overall converter efficiency above 88% at full load.	Use Scenario: Wall-mounted universal-input AC-DC adapter powering laptops, monitors, or set-top boxes. IC Role / Device Role / Timing Role: Primary secondary-side rectifier handling continuous 3A output with repetitive 75A surge tolerance during plug-in events. Use Value: DO-214AA package enables compact board layout and automated assembly; 150V V_RRM provides margin over 120V_RMS × √2 ≈ 170V peak line transients.
Flat Panel Display Power Supply	TV Backlight Inverter Input Stage
Use Scenario: Main 19V/3A supply for LCD/LED panel logic and timing controllers in monitors. IC Role / Device Role / Timing Role: Bulk output rectifier in quasi-resonant or LLC resonant converter powering display subsystems. Use Value: 175°C max junction temperature and 76°C/W R_θJA support stable operation in thermally constrained display enclosures.	Use Scenario: Input rectification stage feeding high-voltage DC bus to CCFL or LED backlight inverter circuits. IC Role / Device Role / Timing Role: Fast-recovery rectifier converting transformer output to stable HV DC, minimizing ringing and stress on switching FETs. Use Value: Low C_J (45pF) and fast t_rr reduce capacitive coupling and voltage overshoot during high-dV/dt transitions typical in inverters.

SMPS Output Rectification

AC-DC Adapter Secondary Side

Use Scenario: High-frequency flyback or forward converter output stage delivering 12–24V/3A to downstream circuitry.

IC Role / Device Role / Timing Role: Power rectifier converting high-frequency AC from transformer secondary into regulated DC output.

Use Value: 25ns t_rr and low V_F minimize conduction and switching losses, improving overall converter efficiency above 88% at full load.

Use Scenario: Wall-mounted universal-input AC-DC adapter powering laptops, monitors, or set-top boxes.

IC Role / Device Role / Timing Role: Primary secondary-side rectifier handling continuous 3A output with repetitive 75A surge tolerance during plug-in events.

Use Value: DO-214AA package enables compact board layout and automated assembly; 150V V_RRM provides margin over 120V_RMS × √2 ≈ 170V peak line transients.

Flat Panel Display Power Supply

TV Backlight Inverter Input Stage

Use Scenario: Main 19V/3A supply for LCD/LED panel logic and timing controllers in monitors.

IC Role / Device Role / Timing Role: Bulk output rectifier in quasi-resonant or LLC resonant converter powering display subsystems.

Use Value: 175°C max junction temperature and 76°C/W R_θJA support stable operation in thermally constrained display enclosures.

Use Scenario: Input rectification stage feeding high-voltage DC bus to CCFL or LED backlight inverter circuits.

IC Role / Device Role / Timing Role: Fast-recovery rectifier converting transformer output to stable HV DC, minimizing ringing and stress on switching FETs.

Use Value: Low C_J (45pF) and fast t_rr reduce capacitive coupling and voltage overshoot during high-dV/dt transitions typical in inverters.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast power rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 600V, t_rr = 35ns, I_F = 3A, same DO-214AA package	Higher voltage rating suits PFC boost outputs; slower recovery increases switching loss in 100–300kHz SMPS	Select when >200V reverse stress is present; avoid where t_rr < 30ns is required for efficiency.
ES3D	V_RRM = 200V, t_rr = 35ns, I_F = 3A, DO-214AA package	200V rating offers margin for 150V designs; 35ns t_rr degrades high-frequency efficiency vs. MUR315SB	Acceptable for lower-switching-frequency adapters; verify thermal rise if operating near 3A continuous at elevated ambient.

Compared with STTH3L06S and ES3D, the MUR315SB delivers superior high-frequency efficiency due to its 25ns t_rr and optimized V_F/I_F trade-off at 150V, making it the preferred choice for compact, thermally constrained 100–500kHz SMPS where reverse voltage does not exceed 150V.

Availability

MUR315SB is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, flat-panel display power systems, and TV backlight inverters requiring stable component supply and consistent DO-214AA packaging.

Supply support for MUR315SB 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global power electronics markets since 1979.

The MUR315SB belongs to TSC's ultra-fast recovery rectifier product line, engineered specifically for high-efficiency, high-density AC-DC and DC-DC conversion in consumer and industrial power supplies.

FAQ

What is the maximum repetitive peak reverse voltage rating for the MUR315SB?

The MUR315SB has a maximum repetitive peak reverse voltage (V_RRM) of 150 V, as confirmed in the Absolute Maximum Ratings table. This value is specific to the MUR315SB variant within the MUR305SB–MUR320SB family and is not interchangeable with other members such as MUR310SB (100 V) or MUR320SB (200 V). The MUR315SB must not be subjected to reverse voltages exceeding 150 V in continuous operation.

What is the forward voltage drop of the MUR315SB at rated current and room temperature?

The MUR315SB exhibits a typical forward voltage (V_F) of 0.86 V at I_F = 3.0 A and T_J = 25°C, with a maximum of 0.90 V under the same conditions. This value is measured using pulse testing (PW = 0.3 ms) and is critical for calculating conduction losses in the MUR315SB's target applications, including SMPS output stages and adapter rectifiers.

Does the MUR315SB have a specified reverse recovery time, and how is it measured?

Yes, the MUR315SB has a maximum reverse recovery time (t_rr) of 25 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This parameter is verified per the Electrical Specifications table and reflects the device's ultra-fast switching behavior, directly impacting efficiency in high-frequency converters where the MUR315SB is deployed.

What package type does the MUR315SB use, and what are its key mechanical attributes?

The MUR315SB uses the DO-214AA (SMB) surface-mount package, with matte tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability-rated molding compound, and polarity indicated by a cathode band. Its approximate weight is 0.110 g, and it meets JESD 201 Class 2 whisker resistance requirements-key attributes for automated placement and long-term reliability in the MUR315SB's intended applications.

Is the MUR315SB suitable for use in automotive applications?

No, the MUR315SB is not designed or qualified for automotive applications. Taiwan Semiconductor explicitly states in its documentation that products in the MUR305SB–MUR320SB series are not intended for medical, life-saving, or life-sustaining applications-including automotive safety-critical systems. The MUR315SB is rated for industrial and consumer-grade operation with T_J = –55°C to +175°C but lacks AEC-Q101 qualification or automotive-specific reliability testing.

MUR315SB 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

MUR315SB FAQ

1.How can I place an order for MUR315SB through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR315SB 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 MUR315SB reliable?

The price and inventory of MUR315SB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR315SB is usually 5 days.

3.What payment methods are accepted for MUR315SB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR315SB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR315SB?

MUR315SB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR315SB 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 MUR315SB?

For technical support, including MUR315SB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR315SB requirements.

6.How does Aetrix verify that MUR315SB is sourced from the original manufacturer or authorized distributors?

All MUR315SB 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 MUR315SB meets industry standards.

7.What is the process for return or replacement of MUR315SB?

All MUR315SB units undergo pre-shipment inspection (PSI). If there is an issue with MUR315SB, 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 MUR315SB part is unused and in its original packaging.

Return procedure for MUR315SB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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