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

Taiwan Semiconductor Corporation MUR310SB

Name: MUR310SB
Brand: Taiwan Semiconductor Corporation
SKU: MUR310SB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR310SB

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: MUR310SB.pdf

Description:: 25NS, 3A, 100V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:6,000

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Product details

Overview

MUR310SB from Taiwan Semiconductor is an ultra-fast surface-mount power rectifier with 100 V repetitive peak reverse voltage (V_RRM), 3 A average forward current (I_F), and 25 ns reverse recovery time (t_rr), designed for high-efficiency switching in AC/DC front-ends of compact power supplies.

For engineers reviewing the MUR310SB datasheet, MUR310SB pinout, MUR310SB application, or MUR310SB equivalent, key selection criteria include its DO-214AA (SMB) package thermal performance (R_θJA = 76 °C/W), low forward voltage (0.86 V @ 3 A, 25°C), and JESD201 Class 2 whisker resistance - critical for industrial and consumer SMPS reliability validation.

Technical Context

The MUR310SB integrates a single-die, glass-passivated silicon junction optimized for ultra-fast recovery (t_rr ≤ 25 ns) under 0.5 A forward / 1.0 A reverse switching conditions, enabling reduced switching losses in 50–500 kHz SMPS topologies. Its 100 V V_RRM rating targets mid-voltage secondary-side rectification where efficiency and thermal margin are prioritized over ultra-high voltage tolerance.

Thermal design relies on PCB-mounted operation: R_θJL = 42 °C/W and R_θJC = 45 °C/W assume a 10 mm × 10 mm copper pad, while moisture sensitivity level 1 (per J-STD-020) eliminates bake requirements prior to reflow. Polarity is marked by a cathode band on the DO-214AA body.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage; defines safe operating range in secondary-side rectification of 12–24 V output SMPS with transient margin.
I_F	3 A - Average forward current at TA = 25°C; derates linearly to ~1.8 A at 100°C ambient per Fig.1 curve.
t_rr	25 ns - Measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables high-frequency operation with minimal reverse recovery loss.
V_F	0.86 V max @ 3 A, 25°C - Low conduction loss improves efficiency in 3–5 W adapter designs; drops to 0.69 V @ 150°C junction.
R_θJA	76 °C/W - Junction-to-ambient thermal resistance on standard 10 mm × 10 mm Cu pad; sets maximum power dissipation limit (~1.3 W at 75°C ΔT).
I_FSM	75 A - Non-repetitive surge current (8.3 ms half-sine); supports cold-start inrush handling without bond-wire fusing.

Pinout & Package

Package: DO-214AA (SMB), surface-mount, single-anode/single-cathode configuration. Cathode identified by molded band. Matte tin-plated leads, RoHS and halogen-free compliant.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Forward current entry point	Connected to transformer secondary or switch node; must handle full 3 A DC + ripple without trace heating.
Cathode (K)	Forward current exit point	Marked by band; ties to output capacitor positive rail; low-inductance layout critical to minimize ringing during t_rr.

Key Features

Feature	Design Value
Glass passivated junction	Enables stable leakage performance (I_R ≤ 5 µA @ 25°C) and long-term reliability under humid environments.
Ultra-fast recovery (t_rr ≤ 25 ns)	Reduces switching loss and EMI generation in 200–500 kHz flyback and LLC converters.
Moisture sensitivity level 1	Eliminates pre-reflow baking; compatible with standard SMT assembly lines without process modification.
UL 94V-0 molding compound	Meets flammability safety requirements for enclosed consumer power adapters and monitors.

Applications

SMPS Secondary Rectification	AC Adapter Output Stage
Use Scenario: 12 V/2.5 A output stage in 30 W offline flyback converter for IoT gateway power supply. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC to regulated DC; operates at 100 kHz switching frequency. Use Value: 25 ns t_rr minimizes reverse recovery charge (Q_rr), reducing MOSFET turn-on loss and improving overall efficiency by ~0.8% vs. standard fast rectifiers.	Use Scenario: Output rectifier in universal-input 5 V/3 A wall adapter for USB-C PD accessories. IC Role / Device Role / Timing Role: Primary DC output rectifier; handles continuous 3 A load with 100 V V_RRM margin against line transients. Use Value: 0.86 V V_F @ 3 A lowers conduction loss to <0.26 W, easing thermal design on compact 2-layer PCBs.
Monitor Power Supply	TV Standby Converter
Use Scenario: +5 V standby rail rectifier in LCD monitor auxiliary power supply (100–240 VAC input). IC Role / Device Role / Timing Role: High-reliability rectifier operating continuously at light load; exposed to frequent thermal cycling. Use Value: Glass passivation and JESD201 Class 2 whisker resistance ensure no degradation after >10,000 thermal cycles.	Use Scenario: 3.3 V/0.5 A standby output in large-screen TV mainboard power section. IC Role / Device Role / Timing Role: Low-leakage rectifier maintaining tight regulation during deep sleep mode (I_R ≤ 5 µA @ 25°C). Use Value: Ultra-low IR enables stable 3.3 V rail hold-up during brief AC dropout events without capacitor oversizing.

SMPS Secondary Rectification

AC Adapter Output Stage

Use Scenario: 12 V/2.5 A output stage in 30 W offline flyback converter for IoT gateway power supply.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC to regulated DC; operates at 100 kHz switching frequency.

Use Value: 25 ns t_rr minimizes reverse recovery charge (Q_rr), reducing MOSFET turn-on loss and improving overall efficiency by ~0.8% vs. standard fast rectifiers.

Use Scenario: Output rectifier in universal-input 5 V/3 A wall adapter for USB-C PD accessories.

IC Role / Device Role / Timing Role: Primary DC output rectifier; handles continuous 3 A load with 100 V V_RRM margin against line transients.

Use Value: 0.86 V V_F @ 3 A lowers conduction loss to <0.26 W, easing thermal design on compact 2-layer PCBs.

Monitor Power Supply

TV Standby Converter

Use Scenario: +5 V standby rail rectifier in LCD monitor auxiliary power supply (100–240 VAC input).

IC Role / Device Role / Timing Role: High-reliability rectifier operating continuously at light load; exposed to frequent thermal cycling.

Use Value: Glass passivation and JESD201 Class 2 whisker resistance ensure no degradation after >10,000 thermal cycles.

Use Scenario: 3.3 V/0.5 A standby output in large-screen TV mainboard power section.

IC Role / Device Role / Timing Role: Low-leakage rectifier maintaining tight regulation during deep sleep mode (I_R ≤ 5 µA @ 25°C).

Use Value: Ultra-low IR enables stable 3.3 V rail hold-up during brief AC dropout events without capacitor oversizing.

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	V_RRM = 60 V, t_rr = 35 ns, I_F = 3 A, same DO-214AA package	Limited to ≤60 V circuits; higher t_rr increases switching loss in >200 kHz designs	Select when cost sensitivity outweighs 100 V margin and 25 ns speed requirement
ON Semi MUR310E	V_RRM = 100 V, t_rr = 25 ns, I_F = 3 A, but DO-214AB (SMC) package (larger footprint)	Requires PCB layout change; higher R_θJA (60 °C/W) limits power density	Choose only if existing design uses SMC footprint and thermal headroom exceeds 2.5 W

Compared with STTH3L06S and MUR310E, the MUR310SB uniquely balances 100 V rating, 25 ns recovery, and DO-214AA footprint - enabling drop-in replacement in space-constrained 100 V SMPS without thermal or layout compromise.

Availability

MUR310SB is available at Aetrix Electronics and suitable for switching mode power supplies, AC adapters, and display power systems requiring stable component supply, consistent parametric performance, and RoHS/halogen-free compliance.

Supply support for MUR310SB 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 rectifiers, TVS diodes, and MOSFETs for industrial and consumer markets.

The MUR310SB belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency, high-efficiency AC/DC conversion in compact, thermally constrained power supplies.

FAQ

What is the maximum junction temperature rating for the MUR310SB?

The MUR310SB has a maximum junction temperature (T_J) of +175°C, verified per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed power adapters or industrial control modules. Derating begins above 25°C ambient, and thermal design must ensure actual T_J stays below 175°C under worst-case load and airflow conditions. The MUR310SB's R_θJA = 76 °C/W on a 10 mm × 10 mm Cu pad directly informs this calculation.

Does the MUR310SB have a cathode marking, and how is polarity identified?

Yes, the MUR310SB uses a molded cathode band on the DO-214AA (SMB) package body to indicate polarity - the banded end is the cathode (K). This matches industry-standard SMB marking convention and ensures correct orientation during automated placement. The anode (A) is the unmarked end. No additional silkscreen or laser marking is used; visual inspection of the band is sufficient for manual or AOI verification.

What is the reverse recovery time (t_rr) test condition for the MUR310SB?

The MUR310SB's reverse recovery time is specified as ≤25 ns under the exact test condition: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, per the Electrical Specifications table. This reflects real-world switching behavior in flyback and forward converters. The value is not guaranteed at higher currents or different di/dt rates, and designers should validate t_rr in their specific circuit using oscilloscope measurement of reverse current tail.

Is the MUR310SB suitable for use in automotive applications?

No, the MUR310SB is not qualified for automotive applications. Taiwan Semiconductor explicitly states in the Notice section that "The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications," and no AEC-Q101 qualification data is provided for the MUR310SB. It is intended for industrial, consumer, and computing power supplies - not automotive ECUs, ADAS, or infotainment systems requiring automotive-grade reliability and testing.

What is the lead finish and solderability specification for the MUR310SB?

The MUR310SB features matte tin-plated leads compliant with J-STD-002 for solderability, ensuring reliable wetting during reflow soldering. The plating meets JESD201 Class 2 for whisker resistance, preventing tin whisker growth under thermal cycling stress. No pre-bake is required due to moisture sensitivity level 1 (J-STD-020), making it compatible with standard SMT assembly processes without special handling.

MUR310SB 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

MUR310SB FAQ

1.How can I place an order for MUR310SB through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR310SB 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 MUR310SB reliable?

The price and inventory of MUR310SB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR310SB is usually 5 days.

3.What payment methods are accepted for MUR310SB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR310SB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR310SB?

MUR310SB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR310SB 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 MUR310SB?

For technical support, including MUR310SB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR310SB requirements.

6.How does Aetrix verify that MUR310SB is sourced from the original manufacturer or authorized distributors?

All MUR310SB 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 MUR310SB meets industry standards.

7.What is the process for return or replacement of MUR310SB?

All MUR310SB units undergo pre-shipment inspection (PSI). If there is an issue with MUR310SB, 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 MUR310SB part is unused and in its original packaging.

Return procedure for MUR310SB:

1.Submit a request within 90 days.

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

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