My Inquiry
My Account
Taiwan Semiconductor Corporation MUR440S R7G
- Part No.:
- MUR440S R7G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
MUR440S R7G.pdf
- Description:
- DIODE GEN PURP 400V 4A DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,042
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MUR440S R7G 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 - deployed in high-frequency switching mode power supplies for telecom and computing infrastructure.
For engineers reviewing the MUR440S R7G datasheet, MUR440S R7G pinout, MUR440S R7G application, or MUR440S R7G equivalent, key selection criteria include its 400 V repetitive peak reverse voltage, 175 °C maximum junction temperature, ultra-fast trr performance, thermal resistance (RθJC = 8.5 °C/W), and RoHS/halogen-free compliance for industrial-grade power conversion designs.
Technical Context
The MUR440S R7G integrates a single-die, glass-passivated silicon junction optimized for high-efficiency freewheeling and output rectification in DC-DC converters and AC-DC front-ends. Its 50 ns reverse recovery time enables operation at switching frequencies up to several hundred kHz without excessive switching loss.
Designed for surface-mount assembly with matte tin-plated leads (J-STD-002 compliant) and moisture sensitivity level 1 (J-STD-020), the device supports automated placement and reflow soldering while maintaining stable electrical behavior across -55 °C to +175 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost diode positions. |
| IF | 4 A continuous - Rated average forward current; determines heatsink sizing and conduction loss in steady-state operation. |
| trr | 50 ns - Ultra-fast reverse recovery time; minimizes switching losses and EMI in high-frequency SMPS designs. |
| VF (max) | 1.25 V @ 4A, 25°C - Forward voltage drop directly impacts conduction loss and thermal rise under load. |
| RθJC | 8.5 °C/W - Junction-to-case thermal resistance; enables accurate thermal modeling when mounted to heatsink or PCB copper. |
| IFSM | 75 A - Non-repetitive peak surge current rating; supports inrush and transient overload conditions without failure. |
| Junction Temp | -55 °C to +175 °C - Wide operating temperature range allows deployment in thermally demanding industrial and telecom environments. |
Pinout & Package
Package: DO-214AB (SMC) - Surface-mount plastic case with cathode band marking; 0.250 g weight; UL 94V-0 rated molding compound; JESD201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to lower-potential node (e.g., switch node in buck converter or transformer secondary center-tap). |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; connects to output rail or filter capacitor; withstands up to 400 V reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and humidity resistance in unsealed industrial enclosures. |
| Ultra-fast 50 ns trr | Reduces turn-off switching loss and associated EMI generation in >100 kHz power topologies. |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental compliance mandates for end-product certification. |
Applications
| Telecom AC-DC Power Supplies | Server DC-DC Converters |
|---|---|
Use Scenario: Output rectification in 48 V input, 12 V/54 A isolated forward converter for 5G base station power modules. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; handles 4 A average current with minimal conduction loss. Use Value: 1.25 V VF and 50 ns trr reduce total power loss by ~12% vs. standard fast recovery diodes at 250 kHz switching frequency. | Use Scenario: Secondary-side synchronous rectification assist in multiphase VRM for AI accelerator cards. IC Role / Device Role / Timing Role: Clamp and snub transient spikes during high di/dt transitions in point-of-load regulators. Use Value: 75 A IFSM and 175 °C TJMAX ensure robustness against load dump and hot-swap events. |
| Industrial Motor Drive Inverters | Networking Equipment PFC Stages |
Use Scenario: Freewheeling path in IGBT gate drive bootstrap circuits for servo motor control inverters. IC Role / Device Role / Timing Role: Provides low-loss return path during high-side switch dead time; operates at 100–200 kHz. Use Value: 8.5 °C/W RθJC enables direct thermal coupling to metal-core PCB, reducing junction temperature rise by 18 °C vs. DO-214AA alternatives. | Use Scenario: Boost diode in active PFC stage of enterprise Ethernet switch power supply. IC Role / Device Role / Timing Role: Conducts high-frequency AC ripple current while blocking 400 V reverse voltage during boost cycle. Use Value: 65 pF junction capacitance limits displacement current and improves power factor correction accuracy above 50 kHz. |
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 4 A / 600 V rating but 65 ns trr; higher VF (1.35 V); TO-277 package. | Higher voltage margin suits 400 V bus designs with transient overshoot; less suitable for <200 kHz high-efficiency optimization. | Select when system requires >600 V blocking or TO-277 mechanical compatibility. |
| ON Semi MUR460S | Identical package and construction but 600 V VRRM; same 50 ns trr, 1.25 V VF, and thermal specs. | Direct upgrade path where higher reverse voltage margin is needed without layout change. | Choose for future-proofing or systems with elevated line transients exceeding 400 V. |
Compared with STTH4L06S, MUR440S R7G delivers lower conduction loss and faster switching at 400 V rating; versus MUR460S, it offers tighter voltage tolerance and reduced junction capacitance - both enabling better efficiency in mid-voltage telecom and server SMPS where 400 V blocking suffices.
Availability
MUR440S R7G is available at Aetrix Electronics and suitable for telecom power supplies, server DC-DC converters, and industrial motor drive inverters requiring stable component supply, full traceability, and long-term production continuity.
Supply support for MUR440S R7G 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 devices, and MOSFETs for industrial and computing markets.
The MUR440S R7G belongs to TSC's ultra-fast recovery rectifier product line, engineered specifically for high-frequency switching power conversion where low VF, fast trr, and thermal robustness are critical in space-constrained SMT designs.
FAQ
What is the maximum junction temperature rating for the MUR440S R7G?
The MUR440S R7G has a maximum junction temperature (TJMAX) of +175 °C, allowing reliable operation in high-ambient environments such as enclosed telecom power modules or industrial motor drives. This rating is validated per absolute maximum ratings table in the official Taiwan Semiconductor datasheet F2102, and must be respected in thermal design using the specified RθJC = 8.5 °C/W value. Derating curves confirm usable current capacity down to -55 °C storage temperature.
Does the MUR440S R7G support lead-free reflow soldering?
Yes, the MUR440S R7G features matte tin-plated leads compliant with J-STD-002 for solderability and is qualified for lead-free reflow profiles per J-STD-020 moisture sensitivity level 1 - meaning no pre-bake is required before assembly. The DO-214AB (SMC) package uses UL 94V-0 molding compound and meets JEDEC standards for thermal cycling and whisker resistance (JESD201 Class 2).
What is the reverse recovery time (trr) of the MUR440S R7G, and under what test conditions is it measured?
The MUR440S R7G has a typical reverse recovery time (trr) of 50 ns, measured under conditions of IF = 0.5 A, IR = 1.0 A, IRR = 0.25 A, and TJ = 25 °C, per the Taiwan Semiconductor F2102 datasheet. This value is consistent across the MUR440S and MUR460S variants and reflects the device's ultra-fast switching capability essential for high-efficiency SMPS designs.
Is the MUR440S R7G RoHS and halogen-free compliant?
Yes, the MUR440S R7G is fully RoHS compliant and halogen-free per IEC 61249-2-21. Taiwan Semiconductor confirms this in the "Features" section of the F2102 datasheet, and the device carries green compound marking (denoted by "G" in the part number suffix). Compliance applies to all homogeneous materials including mold compound, lead frame, and plating.
How does the forward voltage (VF) of the MUR440S R7G vary with temperature and current?
The MUR440S R7G exhibits a VF of ≤1.25 V at 4 A and 25 °C, dropping to ≤1.05 V at 4 A and 150 °C due to negative temperature coefficient of silicon PN junctions. This reduction lowers conduction loss at elevated temperatures - a key advantage in thermally dense power stages. Both values are specified in the Electrical Specifications table of the F2102 datasheet and verified under pulse test conditions (PW = 0.3 ms).
MUR440S R7G 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR440S R7G FAQ
1.How can I place an order for MUR440S R7G through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR440S R7G 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 MUR440S R7G reliable?
The price and inventory of MUR440S R7G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR440S R7G is usually 5 days.
3.What payment methods are accepted for MUR440S R7G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR440S R7G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR440S R7G?
MUR440S R7G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR440S R7G 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 MUR440S R7G?
For technical support, including MUR440S R7G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR440S R7G requirements.
6.How does Aetrix verify that MUR440S R7G is sourced from the original manufacturer or authorized distributors?
All MUR440S R7G 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 MUR440S R7G meets industry standards.
7.What is the process for return or replacement of MUR440S R7G?
All MUR440S R7G units undergo pre-shipment inspection (PSI). If there is an issue with MUR440S R7G, 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 MUR440S R7G part is unused and in its original packaging.
Return procedure for MUR440S R7G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MUR440S R7G Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
