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Taiwan Semiconductor Corporation MUR440 B0G
- Part No.:
- MUR440 B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
MUR440 B0G.pdf
- Description:
- DIODE GEN PURP 400V 4A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
MUR440 B0G from Taiwan Semiconductor is a 4A, 400V ultra-fast recovery rectifier diode in DO-201AD package, featuring 50 ns reverse recovery time, 1.28 V forward voltage at 4A/25°C, and 125 A surge capability - used in high-frequency DC-DC converters and freewheeling paths where fast switching and thermal robustness are critical.
For engineers reviewing the MUR440 B0G datasheet, MUR440 B0G pinout, MUR440 B0G application, or MUR440 B0G equivalent, key selection criteria include verified VRRM = 400 V, IF = 4 A continuous rating, TJMAX = 175 °C operation, RθJL = 15 °C/W thermal resistance, and DO-201AD mechanical compatibility with standard through-hole layouts.
Technical Context
The MUR440 B0G implements a single-die, glass-passivated silicon junction optimized for ultra-fast recovery (trr = 50 ns) under 0.5 A forward / 1.0 A reverse test conditions. Its 400 V repetitive peak reverse voltage supports mid-voltage SMPS topologies without derating in 375 V DC bus applications.
Thermally, it delivers RθJL = 15 °C/W and RθJA = 28 °C/W, enabling 4 A continuous conduction at up to 100 °C ambient when mounted on ≥1 in² copper area - validated per JESD201 Class 2 whisker testing and RoHS/halogen-free compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - supports 375 V DC input rails with 6.7% margin before breakdown |
| IF | 4 A continuous - rated for sustained conduction in 50–200 kHz flyback/freewheeling stages |
| trr | 50 ns - enables >1 MHz switching frequency with minimal turn-off loss in hard-switched converters |
| VF | 1.28 V @ 4 A, 25°C - contributes ≤5.12 W conduction loss at full load, manageable with minimal heatsinking |
| RθJL | 15 °C/W - allows direct PCB copper pad heat transfer; 60°C rise at 4 A enables 115°C junction temp at 55°C ambient |
| IFSM | 125 A @ 8.3 ms - withstands inrush and short-circuit transients in industrial power supplies |
| TJMAX | 175 °C - qualified for under-hood automotive modules and high-ambient industrial enclosures |
Pinout & Package
DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating. Weight: 1.20 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to low-side switch node or transformer secondary center-tap in bridge configurations |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Routes to output capacitor or positive rail; polarity must be observed to prevent catastrophic failure |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable leakage performance across -55°C to +175°C and resists moisture-induced degradation |
| Ultra-fast 50 ns recovery | Reduces reverse recovery charge (Qrr) to <15 nC, minimizing EMI and switching losses in 100+ kHz designs |
| AEC-Q101 qualification option (H suffix) | MUR440 B0G itself is not AEC-Q101 qualified; only MUR440H variants carry this qualification |
| Halogen-free per IEC 61249-2-21 | Meets automotive and industrial environmental compliance mandates without compromising thermal or electrical performance |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 48 V–12 V buck-derived DC-DC modules for telecom and server PSUs. IC Role / Device Role / Timing Role: Ultra-fast rectifier handling 50–200 kHz PWM edge transitions with minimal stored charge. Use Value: 50 ns trr reduces switching loss by ~35% vs. standard FRDs, improving efficiency from 92% to 93.8% at full load. | Use Scenario: Freewheeling path in 3-phase motor drive inverters operating at 8–16 kHz carrier frequency. IC Role / Device Role / Timing Role: Clamp-inductive kickback during IGBT turn-off; requires low Qrr and high TJMAX. Use Value: 175 °C junction rating permits operation in sealed motor control enclosures up to 105 °C ambient without derating. |
| SMPS Freewheeling | Industrial Power Supply |
Use Scenario: Flyback snubber and freewheeling diode in 200 W open-frame AC-DC adapters for factory automation. IC Role / Device Role / Timing Role: Conducts during MOSFET off-time; must recover before next cycle to avoid cross-conduction. Use Value: 125 A IFSM withstands repeated 10 A inrush surges during cold-start, extending service life beyond 100,000 cycles. | Use Scenario: Output rectification in 350 W industrial DIN-rail power supplies with wide-input (85–264 VAC) and 24 V/15 A output. IC Role / Device Role / Timing Role: Primary output rectifier in dual-switch forward topology; handles continuous 4 A with low VF drift. Use Value: 1.28 V VF at 4 A yields only 5.12 W loss, enabling natural convection cooling without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R04DJF | VRRM = 400 V, trr = 35 ns, VF = 1.25 V @ 4 A - faster but lower surge rating (IFSM = 100 A) | Better for high-frequency (>500 kHz) resonant converters; less tolerant of line surges | Select when trr reduction outweighs surge margin; verify layout for higher dV/dt sensitivity |
| ON Semiconductor MUR440E | VRRM = 400 V, trr = 50 ns, VF = 1.25 V @ 4 A - identical recovery, slightly lower VF, same DO-201AD package | Drop-in replacement with minor VF improvement; no layout change required | Preferred for cost-sensitive industrial designs where 0.03 V VF reduction improves thermal margin |
Compared with STTH4R04DJF and MUR440E, the MUR440 B0G offers superior surge robustness (125 A vs. 100 A/125 A) and identical trr to MUR440E, making it optimal for ruggedized 48 V systems where reliability trumps marginal efficiency gains.
Availability
MUR440 B0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term manufacturability, and consistent DO-201AD mechanical fit.
Supply support for MUR440 B0G 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 industrial, computing, and automotive markets since 1979.
The MUR4xx series targets high-efficiency, high-reliability power conversion - engineered specifically for ultra-fast recovery in 50–500 kHz SMPS, with emphasis on thermal stability, surge resilience, and halogen-free compliance.
FAQ
What is the maximum junction temperature rating for MUR440 B0G?
The MUR440 B0G has a maximum junction temperature (TJMAX) of +175 °C, validated across its full operating range from –55 °C to +175 °C. This rating enables use in high-ambient environments such as enclosed industrial drives or under-hood automotive auxiliary supplies. Thermal design must ensure actual junction temperature stays below this limit using RθJL = 15 °C/W and appropriate PCB copper area. The MUR440 B0G data sheet confirms this value in the Absolute Maximum Ratings table.
Is MUR440 B0G AEC-Q101 qualified?
No, MUR440 B0G is not AEC-Q101 qualified. Only variants with the "H" suffix (e.g., MUR440H) carry AEC-Q101 qualification per the ordering information table in the official Taiwan Semiconductor datasheet. The "B0G" suffix indicates green compound and standard industrial qualification. For automotive applications requiring AEC-Q101, MUR440H must be specified - the MUR440 B0G should be used only in industrial or commercial-grade systems.
What is the reverse recovery time (trr) of MUR440 B0G and how is it measured?
The reverse recovery time (trr) of MUR440 B0G is 50 ns, measured under the condition: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, per the Electrical Specifications table. This standardized test reflects real-world hard-switching behavior in SMPS. The MUR440 B0G achieves this via optimized lifetime control and glass passivation, directly reducing switching loss and EMI generation compared to standard fast recovery diodes.
Does MUR440 B0G have a halogen-free construction?
Yes, MUR440 B0G is halogen-free in accordance with IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The molding compound contains no bromine or chlorine-based flame retardants, supporting environmental compliance for industrial and export-oriented electronics. This specification applies to the MUR440 B0G variant and is verified through material certification - no additional screening is required to confirm halogen-free status for the MUR440 B0G.
What is the forward voltage drop of MUR440 B0G at rated current?
The forward voltage drop (VF) of MUR440 B0G is 1.28 V maximum at IF = 4 A and TJ = 25 °C, per the Electrical Specifications table. At elevated temperatures (e.g., 125 °C), VF decreases slightly due to negative temperature coefficient of silicon. This value directly determines conduction loss (Pcond = VF × IF), so at full load, the MUR440 B0G dissipates ≤5.12 W - a key parameter for thermal design validation.
MUR440 B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 1.28 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:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 175°C
MUR440 B0G FAQ
1.How can I place an order for MUR440 B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for MUR440 B0G 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 MUR440 B0G reliable?
The price and inventory of MUR440 B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MUR440 B0G is usually 5 days.
3.What payment methods are accepted for MUR440 B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MUR440 B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MUR440 B0G?
MUR440 B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MUR440 B0G 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 MUR440 B0G?
For technical support, including MUR440 B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MUR440 B0G requirements.
6.How does Aetrix verify that MUR440 B0G is sourced from the original manufacturer or authorized distributors?
All MUR440 B0G 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 MUR440 B0G meets industry standards.
7.What is the process for return or replacement of MUR440 B0G?
All MUR440 B0G units undergo pre-shipment inspection (PSI). If there is an issue with MUR440 B0G, 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 MUR440 B0G part is unused and in its original packaging.
Return procedure for MUR440 B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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