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

Taiwan Semiconductor Corporation MUR440SHR7G

Name: MUR440SHR7G
Brand: Taiwan Semiconductor Corporation
SKU: MUR440SHR7G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MUR440SHR7G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: MUR440SHR7G.pdf

Description:: DIODE GEN PURP 400V 4A DO214AB

Quantity:: RFQ Add To RFQ list

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Inventory:4,196

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Product details

Overview

MUR440SHR7G from Taiwan Semiconductor is a 4A, 400V ultra-fast recovery surface-mount rectifier in DO-214AB (SMC) package, featuring 50 ns reverse recovery time, 1.25 V max forward voltage at 4A/25°C, and 75 A peak surge current. It serves as a freewheeling or output rectifier in high-frequency switching power supplies for telecom and computing infrastructure.

For engineers reviewing the MUR440SHR7G datasheet, MUR440SHR7G pinout, MUR440SHR7G application, or MUR440SHR7G equivalent, key selection criteria include its 400V V_RRM, ultra-fast trr of 50 ns, thermal resistance R_θJC = 8.5°C/W, moisture sensitivity level 1 compliance, and DO-214AB mechanical compatibility with automated SMT placement.

Technical Context

This device uses a single-die, glass-passivated silicon junction optimized for high-efficiency DC-DC conversion. Its 50 ns reverse recovery time enables operation in 100–500 kHz switching topologies without excessive switching loss or EMI generation.

The MUR440SHR7G operates across –55°C to +175°C junction temperature range and maintains low leakage (≤10 μA @ 25°C, ≤250 μA @ 150°C) under rated 400V reverse bias, supporting stable performance in thermally demanding industrial and telecom environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	400 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or LLC secondary rectification.
I_F	4 A - Continuous average forward current; supports sustained conduction in 48 V output rails with appropriate heatsinking.
t_rr	50 ns - Ultra-fast reverse recovery; reduces switching losses and diode-induced ringing in high-frequency SMPS designs.
V_F (max)	1.25 V @ 4A, 25°C - Forward voltage drop directly impacts conduction loss and thermal rise in high-current paths.
R_θJC	8.5 °C/W - Junction-to-case thermal resistance; enables direct thermal coupling to PCB copper or heatsink for reliable 4A operation.
I_FSM	75 A - Non-repetitive peak surge rating; withstands inrush and transient overloads during startup or fault conditions.

Pinout & Package

Package: DO-214AB (SMC), surface-mount, cathode-indicated by molded band, matte tin-plated leads compliant with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return path).
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail; polarity band identifies this terminal for correct PCB orientation and circuit functionality.

Key Features

Feature	Design Value
Glass passivated junction	Enhances long-term reliability and humidity resistance in unsealed industrial enclosures.
Moisture sensitivity level 1	Eliminates bake requirements prior to reflow, enabling direct use in standard SMT lines without process modification.
UL 94V-0 molding compound	Meets flame-retardancy requirements for power supply safety certifications (e.g., UL 62368-1).
JESD 201 Class 2 whisker resistance	Prevents tin whisker growth under thermal cycling, ensuring robustness in automotive-grade or extended-life applications.

Applications

Server Power Supply Rectification	Telecom DC-DC Converter Output
Use Scenario: Secondary-side rectification in 48 V–12 V isolated buck-derived converters delivering up to 100 W per rail. IC Role / Device Role / Timing Role: Ultra-fast freewheeling diode providing low-loss current path during high-side MOSFET off-time. Use Value: 50 ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~0.8% vs. standard fast recovery diodes at 300 kHz.	Use Scenario: Output rectification in 48 V input telecom brick modules powering baseband processing units. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 4 A load with minimal forward drop and thermal rise. Use Value: 1.25 V V_F max at 4A/25°C and R_θJC = 8.5°C/W enable stable operation at 120°C case temperature without derating.
Industrial Motor Drive Snubber	LED Driver Freewheeling Path
Use Scenario: Freewheeling path for IGBT gate-drive transformer leakage energy in servo amplifier auxiliary supplies. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback during rapid IGBT turn-off transitions. Use Value: 75 A I_FSM rating safely handles repetitive 50 A surge transients common in motor control snubbers.	Use Scenario: Freewheeling element in constant-current LED drivers using buck topology with 36 V output. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET off-phase to maintain LED current continuity. Use Value: 400 V V_RRM provides 2× margin over 36 V output, accommodating line transients and ripple without breakdown risk.

Server Power Supply Rectification

Telecom DC-DC Converter Output

Use Scenario: Secondary-side rectification in 48 V–12 V isolated buck-derived converters delivering up to 100 W per rail.

IC Role / Device Role / Timing Role: Ultra-fast freewheeling diode providing low-loss current path during high-side MOSFET off-time.

Use Value: 50 ns t_rr minimizes reverse recovery charge (Q_rr) and associated switching loss, improving efficiency by ~0.8% vs. standard fast recovery diodes at 300 kHz.

Use Scenario: Output rectification in 48 V input telecom brick modules powering baseband processing units.

IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 4 A load with minimal forward drop and thermal rise.

Use Value: 1.25 V V_F max at 4A/25°C and R_θJC = 8.5°C/W enable stable operation at 120°C case temperature without derating.

Industrial Motor Drive Snubber

LED Driver Freewheeling Path

Use Scenario: Freewheeling path for IGBT gate-drive transformer leakage energy in servo amplifier auxiliary supplies.

IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback during rapid IGBT turn-off transitions.

Use Value: 75 A I_FSM rating safely handles repetitive 50 A surge transients common in motor control snubbers.

Use Scenario: Freewheeling element in constant-current LED drivers using buck topology with 36 V output.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET off-phase to maintain LED current continuity.

Use Value: 400 V V_RRM provides 2× margin over 36 V output, accommodating line transients and ripple without breakdown risk.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06S	Same DO-214AB package, 4A/600V, trr = 35 ns, V_F = 1.3 V @ 4A	Higher V_RRM suits 400–600 V bus designs; faster t_rr but higher V_F	Select when >400 V blocking or sub-40 ns recovery is required; verify layout thermal margin due to higher V_F.
ON Semi MUR440E	Same V_RRM/I_F, DO-214AB, trr = 50 ns, V_F = 1.25 V, but MSL level 2 (requires bake)	Identical electrical specs but stricter moisture handling; not drop-in for MSL-1 processes	Use only if MSL-2 compliance is acceptable and bake step is integrated into production flow.

Compared with STTH4L06S and MUR440E, the MUR440SHR7G offers unique MSL-1 readiness and identical 400V/50ns performance-making it optimal for high-volume telecom SMT lines where floor-life and reflow simplicity are critical.

Availability

MUR440SHR7G is available at Aetrix Electronics and suitable for server power supplies, telecom DC-DC converters, and industrial motor drive snubbers requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for MUR440SHR7G 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 industrial, computing, and communications markets since 1979.

The MUR440SHR7G belongs to TSC's MUR4xS ultra-fast rectifier family, engineered specifically for high-frequency switching power conversion where low Q_rr, tight V_F tolerance, and MSL-1 manufacturability are essential.

FAQ

What is the maximum junction temperature rating for the MUR440SHR7G?

The MUR440SHR7G has a maximum junction temperature (T_J) rating of +175°C, allowing operation in high-ambient environments such as enclosed telecom power modules or industrial motor drives. This rating is supported by its 8.5°C/W junction-to-case thermal resistance and glass-passivated die construction, which maintains parameter stability across the full –55°C to +175°C range.

Does the MUR440SHR7G have RoHS and halogen-free compliance?

Yes, the MUR440SHR7G is RoHS compliant and halogen-free per IEC 61249-2-21. These compliance attributes are confirmed in the official Taiwan Semiconductor datasheet (Version F2102) and verified through material declarations. The device uses matte tin-plated leads and UL 94V-0 molding compound, meeting environmental requirements for export and end-equipment certification.

What is the reverse recovery time (t_rr) specification for the MUR440SHR7G?

The MUR440SHR7G has a reverse recovery time (t_rr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. This value is consistent across the MUR440S variant group and is critical for minimizing switching loss and EMI in 200–500 kHz SMPS designs. The t_rr remains stable up to 150°C junction temperature.

Is the MUR440SHR7G suitable for automated SMT assembly?

Yes, the MUR440SHR7G is explicitly designed for automated placement, as stated in its official features list. Its DO-214AB (SMC) package, MSL Level 1 rating, and matte tin-plated leads compliant with J-STD-002 ensure reliable pick-and-place, reflow soldering, and post-assembly reliability without pre-bake or special handling.

What does the 'HR7G' suffix indicate in MUR440SHR7G?

The 'HR7G' suffix in MUR440SHR7G denotes Taiwan Semiconductor's tape-and-reel packaging option: 'H' = halogen-free, 'R7' = 3,000-piece reel, 'G' = green compound. This matches the ordering code structure defined in the MUR4xS datasheet and confirms the device is supplied in RoHS-compliant, MSL-1-ready packaging suitable for high-volume manufacturing.

MUR440SHR7G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 400 V

Current - Average Rectified (Io):: 4A

Voltage - Forward (Vf) (Max) @ If:: 1.25 V @ 4 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 10 µA @ 400 V

Capacitance @ Vr, F:: 65pF @ 4V, 1MHz

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AB (SMC)

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

MUR440SHR7G FAQ

1.How can I place an order for MUR440SHR7G through Aetrix?

Please submit a Request for Quotation (RFQ) for MUR440SHR7G 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 MUR440SHR7G reliable?

The price and inventory of MUR440SHR7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR440SHR7G is usually 5 days.

3.What payment methods are accepted for MUR440SHR7G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR440SHR7G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MUR440SHR7G?

MUR440SHR7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MUR440SHR7G 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 MUR440SHR7G?

For technical support, including MUR440SHR7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR440SHR7G requirements.

6.How does Aetrix verify that MUR440SHR7G is sourced from the original manufacturer or authorized distributors?

All MUR440SHR7G 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 MUR440SHR7G meets industry standards.

7.What is the process for return or replacement of MUR440SHR7G?

All MUR440SHR7G units undergo pre-shipment inspection (PSI). If there is an issue with MUR440SHR7G, 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 MUR440SHR7G part is unused and in its original packaging.

Return procedure for MUR440SHR7G:

1.Submit a request within 90 days.

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

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