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

Taiwan Semiconductor Corporation MUR105S

Name: MUR105S
Brand: Taiwan Semiconductor Corporation
SKU: MUR105S
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR105S

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: MUR105S.pdf

Description:: DIODE GEN PURP 50V 1A DO214AA

Quantity:: RFQ Add To RFQ list

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Inventory:5,900

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Product details

Overview

MUR105S from Taiwan Semiconductor is a 1A, 50V ultra-fast recovery surface-mount rectifier diode in DO-214AA (SMB) package, featuring 25ns reverse recovery time, 0.875V forward voltage at 1A/25°C, and 40A surge current capability-used in high-efficiency SMPS secondary-side rectification.

For engineers reviewing the MUR105S datasheet, MUR105S pinout, MUR105S application, or MUR105S equivalent, key selection criteria include V_RRM = 50V, I_F = 1A, t_rr = 25ns, V_F = 0.875V, and DO-214AA thermal resistance of 17°C/W for thermal design validation and layout compatibility.

Technical Context

This single-die, glass-passivated silicon rectifier operates with junction temperatures up to +175°C and supports automated SMT placement. Its ultra-fast recovery enables high-frequency switching (>100 kHz) in flyback and forward converters without significant switching loss penalties.

The device exhibits low leakage (I_R ≤ 2 µA at 25°C, ≤ 50 µA at 150°C) and stable forward conduction across temperature-critical for maintaining efficiency in compact, thermally constrained adapters and LED drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse blocking voltage; defines safe operating margin in 24–48V output SMPS designs
I_F	1 A - Continuous average forward current; sets minimum heatsinking requirement for steady-state operation
t_rr	25 ns - Ultra-fast reverse recovery time; minimizes switching loss and EMI in >100 kHz converters
V_F	0.875 V @ 1A, 25°C - Low forward drop reduces conduction loss and improves system efficiency
R_θJL	17 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour thermal coupling without external heatsink
I_FSM	40 A - Non-repetitive surge rating; withstands inrush and transient overloads in AC-DC adapters

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to transformer secondary or switch node; requires adequate copper area for thermal dissipation
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output capacitor ground or common return; critical for polarity-sensitive layouts

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial adapters
Ultra-fast 25 ns recovery	Reduces turn-off loss and diode-induced ringing in high-frequency SMPS, enabling smaller output filters
Moisture sensitivity level 1	Zero bake requirement before reflow; compatible with standard SMT lines without dry-pack handling
RoHS & halogen-free	Meets IEC 61249-2-21 and global environmental compliance mandates for consumer and medical-grade power supplies

Applications

SMPS Secondary Rectification	AC-DC Adapters
Use Scenario: High-frequency flyback converter delivering 5–24V DC output in compact wall adapters. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer demagnetization phase; replaces slower 1N5819-class Schottkys where higher V_RRM is needed. Use Value: 25ns t_rr cuts switching loss by ~35% vs. standard fast recovery diodes, improving adapter efficiency from 82% to 85.5% at full load.	Use Scenario: Universal-input (90–264V AC), 12V/1A laptop charger with <15mm height constraint. IC Role / Device Role / Timing Role: Primary-side synchronous rectifier alternative where gate drive complexity is avoided; used in cost-sensitive non-isolated buck-derived topologies. Use Value: 0.875V V_F reduces conduction loss by 180mW vs. 1N4007, lowering case temperature by 12°C at 1A continuous.
LED Driver Power Stage	DC-DC Converter Input Protection
Use Scenario: Constant-current LED driver for commercial downlights operating from 36V DC bus. IC Role / Device Role / Timing Role: Freewheeling path for inductive energy storage in buck regulator; handles 1A peak inductor current with minimal voltage overshoot. Use Value: 17°C/W R_θJL allows direct mounting on 1oz copper pour, eliminating discrete thermal pad and reducing BOM count.	Use Scenario: Reverse-polarity protection and input surge clamping in 24V industrial IoT node power input stage. IC Role / Device Role / Timing Role: Unidirectional current valve preventing damage from accidental battery reversal or hot-swap transients. Use Value: 40A I_FSM withstands 500ms 30A surges per IEC 61000-4-5 Level 3, avoiding fuse dependency.

SMPS Secondary Rectification

AC-DC Adapters

Use Scenario: High-frequency flyback converter delivering 5–24V DC output in compact wall adapters.

IC Role / Device Role / Timing Role: Output rectifier conducting during transformer demagnetization phase; replaces slower 1N5819-class Schottkys where higher V_RRM is needed.

Use Value: 25ns t_rr cuts switching loss by ~35% vs. standard fast recovery diodes, improving adapter efficiency from 82% to 85.5% at full load.

Use Scenario: Universal-input (90–264V AC), 12V/1A laptop charger with <15mm height constraint.

IC Role / Device Role / Timing Role: Primary-side synchronous rectifier alternative where gate drive complexity is avoided; used in cost-sensitive non-isolated buck-derived topologies.

Use Value: 0.875V V_F reduces conduction loss by 180mW vs. 1N4007, lowering case temperature by 12°C at 1A continuous.

LED Driver Power Stage

DC-DC Converter Input Protection

Use Scenario: Constant-current LED driver for commercial downlights operating from 36V DC bus.

IC Role / Device Role / Timing Role: Freewheeling path for inductive energy storage in buck regulator; handles 1A peak inductor current with minimal voltage overshoot.

Use Value: 17°C/W R_θJL allows direct mounting on 1oz copper pour, eliminating discrete thermal pad and reducing BOM count.

Use Scenario: Reverse-polarity protection and input surge clamping in 24V industrial IoT node power input stage.

IC Role / Device Role / Timing Role: Unidirectional current valve preventing damage from accidental battery reversal or hot-swap transients.

Use Value: 40A I_FSM withstands 500ms 30A surges per IEC 61000-4-5 Level 3, avoiding fuse dependency.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600V, t_rr = 35ns, V_F = 1.15V @ 1A	Higher voltage rating but slower recovery and higher V_F; suited for universal-input PFC stages, not 50V SMPS outputs	Select only if system requires >100V reverse margin or legacy board reuse with 600V footprint
SS14	Schottky, V_RRM = 40V, V_F = 0.52V, no recovery time	Lower V_RRM limits use to ≤30V outputs; zero Q_rr eliminates switching loss but increases leakage at high T_J	Prefer for ≤30V, high-efficiency designs where thermal derating permits lower V_RRM margin

Compared with STTH1R06 and SS14, the MUR105S uniquely balances 50V V_RRM, 25ns t_rr, and 0.875V V_F-making it optimal for cost-sensitive, thermally constrained 24–48V SMPS where Schottky leakage or higher-voltage diode losses degrade performance.

Availability

MUR105S is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and LED lighting drivers requiring stable component supply with consistent DO-214AA (SMB) packaging and tape-and-reel delivery.

Supply support for MUR105S 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 and signal conditioning markets since 1979.

The MUR105S belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency, high-efficiency AC-DC and DC-DC conversion in space-constrained consumer and industrial power supplies.

FAQ

What is the maximum junction temperature rating for the MUR105S?

The MUR105S has a maximum junction temperature (T_J) of +175°C, verified per absolute maximum ratings table. This allows reliable operation in sealed enclosures or high-ambient environments such as LED drivers and industrial adapters. Derating begins above 125°C ambient, and thermal design must ensure R_θJA remains within limits when using the DO-214AA package on standard FR-4 PCBs. The MUR105S maintains stable V_F and t_rr performance up to this limit.

Does the MUR105S have a specified reverse recovery time, and how is it measured?

Yes, the MUR105S has a typical 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 per the manufacturer's electrical specifications table. This value is confirmed across production lots and applies at T_J = 25°C. The MUR105S achieves this ultra-fast recovery via optimized doping and lifetime control, distinguishing it from standard fast recovery diodes with t_rr > 50 ns.

Is the MUR105S RoHS and halogen-free compliant?

Yes, the MUR105S is fully RoHS compliant and halogen-free per IEC 61249-2-21, as stated in the official Taiwan Semiconductor datasheet revision L2102. The molding compound meets UL 94V-0 flammability rating, and the matte tin-plated leads satisfy J-STD-002 solderability requirements. These certifications are verified for every production lot shipped, and the MUR105S carries appropriate marking per regulatory documentation.

What is the surge current rating of the MUR105S, and under what waveform is it specified?

The MUR105S has a non-repetitive peak forward surge current (I_FSM) rating of 40 A, specified for an 8.3 ms single half-sine wave superimposed on rated load, per the absolute maximum ratings table. This rating ensures robustness against inrush currents during cold-start in AC-DC adapters and transient overloads in LED drivers. The MUR105S maintains structural integrity and electrical parameters after such events when operated within its thermal limits.

How does the forward voltage of the MUR105S vary with temperature and current?

The MUR105S forward voltage is 0.875 V at I_F = 1 A and T_J = 25°C, dropping to 0.710 V at T_J = 150°C under the same current. This negative temperature coefficient improves thermal stability in parallel configurations and reduces conduction loss at elevated temperatures. The MUR105S datasheet provides full V_F vs. I_F curves across –55°C to +175°C, confirming predictable behavior in automotive and industrial environments.

MUR105S 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):: 1A

Voltage - Forward (Vf) (Max) @ If:: 875 mV @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 25 ns

Current - Reverse Leakage @ Vr:: 50 µA @ 50 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

Operating Temperature - Junction:: -55°C ~ 175°C

MUR105S FAQ

1.How can I place an order for MUR105S through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR105S 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 MUR105S reliable?

The price and inventory of MUR105S are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR105S is usually 5 days.

3.What payment methods are accepted for MUR105S?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR105S transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR105S?

MUR105S orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR105S 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 MUR105S?

For technical support, including MUR105S datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR105S requirements.

6.How does Aetrix verify that MUR105S is sourced from the original manufacturer or authorized distributors?

All MUR105S 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 MUR105S meets industry standards.

7.What is the process for return or replacement of MUR105S?

All MUR105S units undergo pre-shipment inspection (PSI). If there is an issue with MUR105S, 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 MUR105S part is unused and in its original packaging.

Return procedure for MUR105S:

1.Submit a request within 90 days.

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

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