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Diodes Incorporated MMBD4148-7
- Part No.:
- MMBD4148-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBD4148-7.pdf
- Description:
- DIODE GEN PURP 75V 300MA SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
MMBD4148-7 from Diodes Incorporated is a surface-mount fast-switching silicon switching diode in SOT23 package, rated for 75 V peak repetitive reverse voltage, 300 mA forward current, and 4.0 ns reverse recovery time. It serves as a general-purpose high-speed switching element in signal routing, clamp protection, and logic-level translation circuits across consumer and industrial PCBs.
For engineers reviewing the MMBD4148-7 datasheet, MMBD4148-7 pinout, MMBD4148-7 application, or MMBD4148-7 equivalent, key selection criteria include its 4.0 ns tRR, 0.855 V VF at 10 mA, 1.0 µA IR at 75 V, SOT23 footprint compatibility, and RoHS-compliant green molding compound - all critical for high-frequency digital interface and transient suppression designs.
Technical Context
This diode operates as a unidirectional PN junction device optimized for low-charge, high-speed switching. Its 4.0 ns reverse recovery time enables reliable operation in 10–50 MHz clocked logic interfaces and pulse-shaping networks, while its 75 V VRRM supports use in 24 V and 48 V system-level signal conditioning.
The device exhibits 2.0 pF junction capacitance at 0 V bias and 1.0 MHz, minimizing signal distortion in RF-coupled paths; leakage remains ≤1.0 µA at 75 V and 25°C, ensuring stable DC blocking in precision analog front-ends and level-shifted control lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 75 V - Supports reliable blocking in 24 V/48 V industrial control and telecom signal paths |
| tRR | 4.0 ns - Enables clean edge transitions in >10 MHz digital switching and pulse generation |
| VF @ 10 mA | 0.855 V - Minimizes forward conduction loss in logic-level clamping and steering applications |
| IR @ 75 V | 1.0 µA - Ensures low standby leakage in battery-backed and low-power sensor interfaces |
| CT @ 0 V | 2.0 pF - Reduces capacitive loading on high-impedance nodes in RF detector and sample-hold circuits |
| PD | 350 mW - Allows continuous operation at 300 mA with appropriate PCB copper thermal relief |
Pinout & Package
Package: SOT23 - 3-terminal surface-mount plastic package with 0.915 mm typical lead pitch, 2.40 mm body length, and 1.30 mm body width; compatible with automated pick-and-place and reflow soldering per J-STD-020 Level 1 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node during conduction; polarity-marked by cathode band on package top view |
| Cathode (Pin 2) | Forward current exit point / reverse voltage terminal | Connected to lower-potential node; functions as clamping reference or return path in protection circuits |
| NC / Dummy (Pin 3) | No internal connection | Thermal pad extension only; electrically isolated and may be left floating or grounded for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4.0 ns reverse recovery time enables use in 10–50 MHz digital timing and pulse shaping |
| SOT23 surface-mount package | 0.008 g weight and 2.4 × 1.3 mm footprint support high-density layout in space-constrained modules |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900 ppm Br/Cl and <1000 ppm Sb; suitable for export-controlled designs |
| Low junction capacitance | 2.0 pF at 0 V allows minimal signal attenuation in RF detector and high-speed data line clamping |
Applications
| Digital Logic Clamping | ESD Protection Interface |
|---|---|
Use Scenario: Preventing overvoltage excursions on CMOS input pins during hot-plug or bus contention events. IC Role / Device Role: Fast clamping diode shunting transient energy to VCC or GND rails before IC damage threshold is exceeded. Use Value: 4.0 ns tRR ensures sub-nanosecond response to ESD pulses, preserving signal integrity in USB 2.0 and I²C buses. | Use Scenario: Protecting microcontroller GPIOs and ADC inputs from human-body-model (HBM) discharges. IC Role / Device Role: Low-leakage (<1.0 µA) bidirectional clamp limiting rail-to-rail transients without DC loading. Use Value: 2.0 pF CT minimizes capacitive coupling into sensitive analog nodes, avoiding measurement drift or false triggers. |
| High-Speed Signal Steering | DC-DC Converter Snubbing |
Use Scenario: Routing clock or data signals between multiple sources using diode-OR logic in FPGA configuration circuits. IC Role / Device Role: Unidirectional isolation element enabling priority-based signal selection without cross-talk. Use Value: 0.855 V VF at 10 mA maintains TTL/CMOS logic thresholds across temperature, ensuring deterministic state resolution. | Use Scenario: Suppressing voltage spikes across MOSFET drains in flyback and buck-boost converters. IC Role / Device Role: Fast-recovery snubber diode absorbing inductive kickback energy during switch turn-off. Use Value: 75 V VRRM and 350 mW PD allow sustained operation under 40 V nominal rail conditions with 20% margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS16-7-F | Identical electrical specs (VRRM = 75 V, tRR = 4.0 ns, VF = 0.855 V @ 10 mA), same SOT23 package, same RoHS/Green compliance | No functional difference; BAS16 is Diodes' legacy part number for identical die and construction | Select when sourcing from legacy BOMs or distributor stock referencing BAS16 nomenclature |
| MMBD914-7-F | Same VRRM (75 V) and tRR (4.0 ns), but higher VF (0.95 V @ 10 mA) and higher IR (5.0 µA @ 75 V) | Marginally higher conduction loss and leakage; acceptable where 0.1 V VF tolerance and 4× leakage are design-allowable | Choose only if MMBD4148-7-F is unavailable and thermal budget permits +0.095 V VF rise |
Compared with BAS16-7-F, MMBD4148-7 offers identical performance and drop-in compatibility; versus MMBD914-7-F, it delivers lower forward voltage and leakage - critical for low-power and precision signal-path applications where millivolt-level headroom and nanoampere leakage matter.
Availability
MMBD4148-7 is available at Aetrix Electronics and suitable for digital logic clamping, ESD protection interfaces, high-speed signal steering, and DC-DC converter snubbing requiring stable component supply across production lifecycles.
Supply support for MMBD4148-7 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, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBD4148 belongs to Diodes' general-purpose switching diode product line, engineered for high-speed, low-loss signal routing and transient suppression in cost-sensitive, high-volume consumer and industrial electronics.
FAQ
Is MMBD4148-7 suitable for automotive applications?
No - MMBD4148-7 is not AEC-Q101 qualified. For automotive-grade use, Diodes offers the BAS16Q-7-F variant, which is PPAP-capable, manufactured in IATF 16949-certified facilities, and explicitly qualified for automotive applications requiring change control and reliability validation.
What is the maximum operating temperature for MMBD4148-7?
The MMBD4148-7 has an operating junction temperature range of –55°C to +150°C. At ambient temperatures above 70°C, power dissipation must be derated per the published curve (350 mW at 25°C, linearly decreasing to 0 mW at 150°C), requiring adequate PCB copper area for thermal management.
Does MMBD4148-7 have a built-in ESD protection structure?
No - MMBD4148-7 is a passive PN junction diode without integrated ESD protection circuitry. It functions as an external clamp element in ESD protection schemes but relies on external TVS or RC networks for full HBM/IEC 61000-4-2 compliance; its 1.0 µA IR at 75 V supports low-leakage biasing in such configurations.
Can MMBD4148-7 replace 1N4148 in SOT23 footprint designs?
Yes - MMBD4148-7 is the surface-mount SOT23 equivalent of the through-hole 1N4148, sharing identical electrical specifications (VRRM = 75 V, tRR = 4.0 ns, VF ≈ 0.855 V @ 10 mA). Its SOT23 package enables direct replacement in automated assembly processes without circuit redesign.
MMBD4148-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 150 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 75 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
- Operating Temperature - Junction:
- -65°C ~ 150°C
MMBD4148-7 FAQ
1.How can I place an order for MMBD4148-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4148-7 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 MMBD4148-7 reliable?
The price and inventory of MMBD4148-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4148-7 is usually 5 days.
3.What payment methods are accepted for MMBD4148-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4148-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4148-7?
MMBD4148-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4148-7 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 MMBD4148-7?
For technical support, including MMBD4148-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4148-7 requirements.
6.How does Aetrix verify that MMBD4148-7 is sourced from the original manufacturer or authorized distributors?
All MMBD4148-7 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 MMBD4148-7 meets industry standards.
7.What is the process for return or replacement of MMBD4148-7?
All MMBD4148-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4148-7, 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 MMBD4148-7 part is unused and in its original packaging.
Return procedure for MMBD4148-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4148-7 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
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