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onsemi MMBD1401
- Part No.:
- MMBD1401
- Manufacturer:
- onsemi
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBD1401.pdf
- Description:
- DIODE GP 200V 200MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:13,754
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Product details
Overview
MMBD1401 from onsemi is a surface-mount small-signal switching diode in SOT-23 package, rated for 200 V repetitive reverse voltage, 200 mA average forward current, and 50 ns reverse recovery time. It delivers low forward voltage (760–920 mV at 50 mA) and ultra-low reverse leakage (≤40 nA at 120 V), making it suitable for high-efficiency DC-DC converter flyback snubbers and signal-level clamping in industrial control I/O circuits.
For engineers reviewing the MMBD1401 datasheet, pinout, applications, or equivalent options, key selection criteria include verified 200 V VRRM, sub-1 V VF at 50 mA, <2 pF junction capacitance, 50 ns trr, and SOT-23 pin-compatible layout compatibility with MMBD1403/1404/1405 variants.
Technical Context
The MMBD1401 is a silicon planar epitaxial switching diode optimized for fast transient response and low leakage in space-constrained applications. Its 50 ns reverse recovery time and ≤2.0 pF capacitance support operation up to ~100 MHz in RF detector and sample-and-hold circuits.
Designed for unidirectional conduction with anode-cathode polarity, it operates across −55 °C to +150 °C junction temperature and dissipates up to 350 mW at 25 °C ambient. Thermal resistance is 357 °C/W, requiring minimal PCB copper for thermal management in low-power signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports input rectification and clamp protection in 12–48 V industrial power rails without breakdown. |
| IF(AV) | 200 mA - enables continuous use in logic-level signal routing and low-current bias networks. |
| VF @ 50 mA | 760–920 mV - minimizes forward conduction loss in precision clamping and level-shifting circuits. |
| IR @ 120 V | ≤40 nA - ensures negligible leakage in high-impedance sensor interfaces and battery-backed monitoring nodes. |
| trr | 50 ns - allows reliable operation in 1–5 MHz switching converters and pulse shaping networks. |
| CT | ≤2.0 pF @ 0 V - preserves signal integrity in RF sampling, ESD protection feedback paths, and high-speed data lines. |
| PD | 350 mW - permits direct mounting on standard FR-4 without heatsinking in ambient temperatures ≤70 °C. |
Pinout & Package
SOT-23 (Case 318BM), 2.90 mm × 1.30 mm × 1.00 mm, Pb-free, tape-and-reel packaging (3000 units per reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connects to positive rail or signal source in clamp/clipping configurations. |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or via allowed. |
| 3 | Cathode | Forward current exit point; ties to ground, reference node, or return path in rectifier/snubber topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 50 ns trr enables clean edge preservation in digital signal conditioning and pulse-width modulation feedback loops. |
| Ultra-low leakage | ≤40 nA reverse current at 120 V ensures stable biasing in high-gain amplifier input stages and precision voltage references. |
| Low forward voltage | 760–920 mV at 50 mA reduces power dissipation and self-heating in always-on monitoring circuits. |
| Small footprint | SOT-23 package occupies <3 mm² PCB area-ideal for dense industrial PLC I/O modules and portable test equipment. |
| High-temperature operation | Rated to +150 °C junction temperature supports deployment in enclosed motor drive enclosures and automotive under-hood sensors. |
Applications
| Industrial Sensor Signal Conditioning | DC-DC Converter Snubber Network |
|---|---|
|
Use Scenario: Protecting analog front-end inputs of 4–20 mA transmitters from ESD and overvoltage transients. IC Role / Device Role / Timing Role: Clamping diode limiting input voltage swing to ±0.7 V beyond supply rails. Use Value: Sub-2 pF capacitance prevents signal distortion at 10 kHz sensor bandwidth; 40 nA leakage avoids offset drift in 10 MΩ input impedance stages. |
Use Scenario: Suppressing voltage spikes across MOSFET drains in 500 kHz buck converters powering FPGA core rails. IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing inductive kickback energy during switch turn-off. Use Value: 50 ns trr ensures full energy transfer before next switching cycle; 200 V rating covers 12 V input with 3× safety margin. |
| Logic-Level Voltage Translation | RF Detector Diode in 2.4 GHz ISM Band |
|
Use Scenario: Level-shifting between 3.3 V microcontroller GPIO and 5 V legacy peripheral interfaces. IC Role / Device Role / Timing Role: Passive bidirectional clamp diode establishing safe voltage thresholds between domains. Use Value: 760 mV VF at 10 mA ensures minimal voltage drop during active pull-up; SOT-23 fits tight pitch between MCU and connector. |
Use Scenario: Demodulating amplitude-modulated RF signals in Bluetooth LE beacon receiver front-ends. IC Role / Device Role / Timing Role: Zero-bias envelope detector diode converting RF carrier to baseband envelope. Use Value: ≤2.0 pF CT maintains >95% detection efficiency at 2.4 GHz; low VF improves sensitivity for weak signal capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar small-signal switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBD1403 | Same package, same VRRM (200 V), but higher VF (800–1000 mV @ 50 mA) and higher IR (≤100 nA @ 175 V). | Less suitable for low-leakage precision clamping; preferred where higher surge tolerance (2.0 A IFSM) is critical. | Select MMBD1403 only when peak surge immunity outweighs leakage and forward drop requirements. |
| BAT54C | Lower VRRM (30 V), lower VF (350–450 mV @ 10 mA), higher CT (10 pF), and dual-diode configuration in same SOT-23. | Not interchangeable for 200 V applications; used in low-voltage logic clamping and dual-rail protection where capacitance is less critical. | Choose BAT54C only for sub-30 V systems requiring dual-anode-cathode topology and ultra-low VF. |
Compared with MMBD1403 and BAT54C, the MMBD1401 uniquely balances 200 V standoff, sub-1 V forward drop, <2 pF capacitance, and ≤40 nA leakage-making it the only option among the three viable for high-voltage, high-frequency, low-leakage signal conditioning.
Availability
MMBD1401 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC-DC converter snubbers, and RF detector circuits requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for MMBD1401 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
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBD1401 belongs to onsemi's Small Signal Diodes product line, engineered specifically for fast-switching, low-leakage signal routing and protection in compact, thermally constrained electronic systems.
FAQ
What is the maximum operating junction temperature for the MMBD1401?
The MMBD1401 has a maximum operating junction temperature of 150 °C, validated per its Absolute Maximum Ratings table. This allows reliable operation in sealed industrial enclosures or near heat-generating components. Derating begins above 25 °C ambient, with power dissipation reduced linearly to zero at 150 °C junction-ensuring thermal safety margins in designs using the MMBD1401.
Is the MMBD1401 pin-compatible with other diodes in the MMBD140x family?
Yes-the MMBD1401 shares identical SOT-23 pinout (Anode–NC–Cathode) and mechanical dimensions with MMBD1403, MMBD1404, and MMBD1405. All four variants use Style 8 marking per onsemi's mechanical drawings, confirming consistent terminal assignment. However, electrical parameters differ, so functional substitution requires verification of VRRM, VF, and IR against circuit requirements for the MMBD1401.
Does the MMBD1401 have a built-in protection feature like integrated TVS or ESD diode structure?
No-the MMBD1401 is a discrete silicon switching diode without integrated TVS, ESD, or transient suppression features. Its 200 V VRRM provides basic reverse blocking, but it does not meet IEC 61000-4-2 ESD immunity standards or offer clamping voltage regulation. For ESD protection, external TVS devices such as NUP4105 or PUSB3FR must be used alongside the MMBD1401 in sensitive interface designs.
Can the MMBD1401 be used in AC signal rectification applications?
Yes-the MMBD1401 supports average rectified forward current of 200 mA and non-repetitive surge current up to 1.0 A (1 s pulse), making it suitable for low-power AC-to-DC signal rectification in instrumentation front-ends and auxiliary power supplies. Its 50 ns trr ensures minimal waveform distortion at frequencies up to 100 kHz, though full-wave bridge configurations require four MMBD1401 units due to its single-diode construction.
What is the typical reverse recovery time (trr) of the MMBD1401, and how is it measured?
The MMBD1401 has a maximum reverse recovery time of 50 ns, tested under standardized conditions: IF = IR = 30 mA, IRR = 3.0 mA, and RL = 100 Ω. This value reflects the time required for minority carriers to clear after forward conduction ceases-critical for minimizing switching losses in high-frequency power converters. The MMBD1401's trr is confirmed in Figure 9 of its official datasheet and applies directly to the MMBD1401, not inferred from family averages.
MMBD1401 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 175 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- 150°C (Max)
MMBD1401 FAQ
1.How can I place an order for MMBD1401 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD1401 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 MMBD1401 reliable?
The price and inventory of MMBD1401 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD1401 is usually 5 days.
3.What payment methods are accepted for MMBD1401?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD1401 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD1401?
MMBD1401 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD1401 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 MMBD1401?
For technical support, including MMBD1401 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD1401 requirements.
6.How does Aetrix verify that MMBD1401 is sourced from the original manufacturer or authorized distributors?
All MMBD1401 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 MMBD1401 meets industry standards.
7.What is the process for return or replacement of MMBD1401?
All MMBD1401 units undergo pre-shipment inspection (PSI). If there is an issue with MMBD1401, 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 MMBD1401 part is unused and in its original packaging.
Return procedure for MMBD1401:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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