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Diodes Incorporated MURS120-13
- Part No.:
- MURS120-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
MURS120-13.pdf
- Description:
- DIODE GEN PURP 200V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,196
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Product details
Overview
MURS120-13 from Diodes Incorporated is a surface-mount ultrafast recovery rectifier diode rated for 200 V repetitive peak reverse voltage, 1 A average forward current, and 35 ns reverse recovery time, used in high-frequency switching power supplies and DC-DC converters.
For engineers reviewing the MURS120-13 datasheet, MURS120-13 pinout, MURS120-13 application, or MURS120-13 equivalent, key selection criteria include reverse recovery time, forward voltage drop at 1 A, thermal resistance (RθJA = 75 °C/W), junction-to-case thermal path, and SMB package compatibility with automated SMT assembly.
Technical Context
This diode employs a planar epitaxial construction with optimized carrier lifetime control to achieve ultrafast recovery performance. Its low Qrr (typ. 15 nC) and soft recovery waveform reduce EMI and switching losses in flyback and forward converter topologies.
The device operates with a maximum junction temperature of 175 °C and exhibits a typical forward voltage of 0.92 V at IF = 1 A and TJ = 25 °C. It is designed for unidirectional current conduction in secondary-side rectification and freewheeling paths where speed and efficiency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum non-repetitive reverse voltage the diode withstands without breakdown during transient conditions. |
| IF(AV) | 1 A - Continuous average forward current rating under specified thermal conditions (TC = 75 °C). |
| trr | 35 ns - Measured reverse recovery time at IF = 0.5 A, di/dt = 100 A/μs, TJ = 25 °C; enables operation up to ~500 kHz switching frequency. |
| VF | 0.92 V @ 1 A - Forward voltage drop directly impacts conduction loss and thermal load in high-duty-cycle applications. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance in standard FR-4 PCB layout (1 cm² copper pad); defines required board-level heatsinking. |
| TJ(max) | 175 °C - Maximum allowable junction temperature; sets upper limit for ambient + self-heating design margin. |
Pinout & Package
Supplied in SMB (DO-214AA) plastic package with gull-wing surface-mount terminals. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry point | Connected to lower-potential node (e.g., transformer secondary center-tap or switch node return path). |
| Cathode (K) | Forward current exit point | Connected to output rail or filter capacitor positive terminal; polarity marking essential for correct orientation in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery time | 35 ns - Reduces switching loss and EMI generation in high-frequency SMPS designs. |
| Low forward voltage | 0.92 V @ 1 A - Minimizes conduction loss and improves system efficiency at full load. |
| SMB package compatibility | JEDEC DO-214AA footprint - Enables automated placement and reflow soldering with industry-standard pick-and-place equipment. |
| High junction temperature rating | 175 °C - Supports reliable operation in thermally constrained environments such as enclosed power adapters. |
Applications
| AC-DC Adapter Secondary Rectification | DC-DC Converter Freewheeling Diode |
|---|---|
Use Scenario: 12 V/1 A output stage in compact wall-wart adapters operating at 100–300 kHz. IC Role / Device Role / Timing Role: Unidirectional current rectifier converting transformer AC output to regulated DC; replaces slower general-purpose diodes to improve efficiency. Use Value: 35 ns trr reduces reverse recovery loss by >40% vs. standard 1N4007, lowering thermal stress on PCB. | Use Scenario: Output stage of isolated 5 V/2 A buck-derived DC-DC module for industrial IoT sensors. IC Role / Device Role / Timing Role: Freewheeling path for inductor current during high-side switch off-time; requires fast turn-off to prevent cross-conduction. Use Value: Soft recovery characteristic suppresses voltage spikes across MOSFET drain, eliminating need for snubber networks. |
| Automotive LED Driver Output Rectifier | USB-C PD Power Path Protection |
Use Scenario: Constant-current LED driver in automotive cabin lighting with 12 V input and 36 V string output. IC Role / Device Role / Timing Role: Output rectifier in flyback topology; must survive load dump transients up to 40 V and operate at -40 to +125 °C ambient. Use Value: 200 V VRRM provides 5× safety margin over 12 V nominal bus, enabling robustness against ISO 7637-2 pulse 5a. | Use Scenario: Reverse-polarity and backfeed protection in dual-input USB-C PD power banks. IC Role / Device Role / Timing Role: OR-ing diode between two 20 V PD inputs; blocks reverse current while minimizing forward drop. Use Value: 0.92 V VF limits power dissipation to <1 W at 1 A, avoiding thermal derating in space-constrained battery packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R02U | Same VRRM (200 V), slightly higher trr (50 ns), higher VF (0.95 V @ 1 A) | Higher recovery loss in >300 kHz designs; less suitable for compact adapters | Prefer MURS120-13 when minimizing EMI and thermal footprint is critical |
| ES1D-E3/57T | Lower VRRM (200 V same), identical trr (35 ns), but higher RθJA (90 °C/W) | Requires larger copper area for same thermal performance; less board-area efficient | Choose MURS120-13 for tighter thermal constraints or smaller PCB real estate |
Compared with STTH1R02U and ES1D-E3/57T, MURS120-13 delivers superior thermal efficiency (75 °C/W) and lowest conduction loss (0.92 V), making it optimal for space- and thermally constrained 1 A ultrafast rectification where EMI reduction is prioritized.
Availability
MURS120-13 is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converters, automotive LED drivers, and USB-C PD power path designs requiring stable component supply and consistent parametric performance across production lots.
Supply support for MURS120-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
MURS120-13 belongs to the Ultrafast Recovery Rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in consumer, industrial, and automotive applications where fast switching and low loss are mandatory.
FAQ
What is the maximum allowable surge current (IFSM) for MURS120-13?
The MURS120-13 has a peak non-repetitive forward surge current rating of 25 A (half-sine wave, 1 cycle, TJ = 25 °C). This value supports brief inrush events during cold-start of power supplies but must not be exceeded in repetitive operation or sustained overload conditions.
Is MURS120-13 RoHS compliant and halogen-free?
Yes, MURS120-13 is RoHS compliant per Directive 2011/65/EU and meets Diodes Incorporated's halogen-free standard (≤900 ppm bromine, ≤900 ppm chlorine, total halogens ≤1500 ppm), verified per JEDEC J-STD-709B test methods.
Can MURS120-13 replace a 1N4937 in a 12 V/1 A power supply?
No - the 1N4937 is a general-purpose 1 A/600 V rectifier with trr > 200 ns. Replacing it with MURS120-13 (200 V/35 ns) improves efficiency and EMI but requires verifying that 200 V VRRM meets worst-case transient voltage margins in the specific design.
What is the typical reverse leakage current (IR) at 25 °C and 150 °C?
At 25 °C and VR = 200 V, IR is typically 0.1 μA (max 5 μA). At 150 °C and same voltage, it rises to typ. 10 μA (max 100 μA), reflecting expected thermal behavior of silicon PN junctions under reverse bias.
MURS120-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 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:
- 2 µA @ 200 V
- Capacitance @ Vr, F:
- 27pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -55°C ~ 175°C
MURS120-13 FAQ
1.How can I place an order for MURS120-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for MURS120-13 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 MURS120-13 reliable?
The price and inventory of MURS120-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MURS120-13 is usually 5 days.
3.What payment methods are accepted for MURS120-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MURS120-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MURS120-13?
MURS120-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MURS120-13 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 MURS120-13?
For technical support, including MURS120-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MURS120-13 requirements.
6.How does Aetrix verify that MURS120-13 is sourced from the original manufacturer or authorized distributors?
All MURS120-13 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 MURS120-13 meets industry standards.
7.What is the process for return or replacement of MURS120-13?
All MURS120-13 units undergo pre-shipment inspection (PSI). If there is an issue with MURS120-13, 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 MURS120-13 part is unused and in its original packaging.
Return procedure for MURS120-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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