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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated MMBD4148-7-F

Name: MMBD4148-7-F
Brand: Diodes Incorporated
SKU: MMBD4148-7-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMBD4148-7-F

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: MMBD4148-7-F.pdf

Description:: DIODE GEN PURP 75V 300MA SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:197,723

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Product details

Overview

MMBD4148-7-F 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-F datasheet, MMBD4148-7-F pinout, MMBD4148-7-F application, or MMBD4148-7-F equivalent, key selection criteria include reverse recovery speed, low forward voltage at 10–50 mA, leakage performance at elevated temperature, and compatibility with automated SMT assembly on FR-4 boards.

Technical Context

This diode operates as a unidirectional PN junction device optimized for rapid turn-off behavior, enabled by low minority-carrier lifetime design. Its 4.0 ns t_RR supports operation in 100+ MHz digital switching and pulse shaping applications where minimal storage time is critical.

Thermal performance is defined for mounting on 1-inch², 2 oz copper pads (R_θJA = 357 °C/W), with full derating to zero power at +150 °C ambient. The device maintains <50 µA leakage at 75 V and +150 °C, enabling stable clamping in thermally demanding environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Repetitive Reverse Voltage	75 V - Supports DC blocking and transient suppression up to 75 V without avalanche conduction
Forward Current (Continuous)	300 mA - Sustains logic-level switching and moderate-signal routing without thermal runaway on standard PCB layout
Reverse Recovery Time	4.0 ns - Enables clean edge transitions in >100 MHz clock distribution and high-speed data line clamping
Forward Voltage @ 10 mA	0.715 V - Minimizes voltage drop in low-power signal path conditioning and level-shifting networks
Leakage Current @ 75 V, +150°C	50 µA - Ensures reliable off-state isolation in hot-running industrial control modules
Package	SOT23 - Standardized 3-pin surface-mount footprint compatible with high-volume pick-and-place equipment

Pinout & Package

MMBD4148-7-F uses the industry-standard SOT23 plastic package (2.90 mm × 1.30 mm × 1.03 mm) with matte tin-plated alloy 42 leads, moisture sensitivity level 1, and UL 94V-0 flammability rating.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Current entry node under forward bias	Connected to lower-potential side of signal path; polarity-marked via cathode band on package top view
Cathode (Pin 2)	Current exit node under forward bias; primary reverse-blocking terminal	Connected to higher-potential rail or logic output; functions as clamp sink during overvoltage events
No Connect (Pin 3)	Internal die attachment pad	Electrically isolated; serves mechanical anchoring only-must not be connected in circuit layout

Key Features

Feature	Design Value
Fast switching speed	4.0 ns reverse recovery enables use in >100 MHz digital timing paths without waveform distortion
Surface-mount packaging	SOT23 footprint supports automated placement and reflow at ≤260 °C peak, compliant with J-STD-020 Level 1
Low forward voltage	0.715 V @ 10 mA reduces power loss and heating in battery-powered sensor interface circuits
High-temperature leakage control	50 µA @ 75 V / +150 °C ensures stable off-state behavior in automotive under-hood and industrial motor drive environments

Applications

Digital Logic Clamping

ESD Protection Interface

Use Scenario: Preventing overshoot/undershoot on CMOS input pins driven by long traces or external connectors.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp diode placed between I/O line and V_CC/GND rails.

Use Value: 4.0 ns t_RR and sub-1 V forward drop limit transient excursion to within ±0.8 V of rail, preserving logic threshold margins.

Use Scenario: Front-end protection for USB, UART, or I²C lines exposed to human contact or cable coupling.

IC Role / Device Role / Timing Role: Low-capacitance (2.0 pF) steering diode in rail-to-rail ESD clamp topology.

Use Value: 2.0 pF CT minimizes signal integrity impact on 12 Mbps UART or 400 kHz I²C buses while passing IEC 61000-4-2 Level 4 transients.

Signal Level Translation

High-Speed Pulse Shaping

Use Scenario: Interfacing 3.3 V microcontroller GPIOs with 5 V peripheral logic without level-shifter ICs.

IC Role / Device Role / Timing Role: Passive bidirectional level translator using diode-drop offset between supply domains.

Use Value: 0.715 V VF at 10 mA provides predictable 0.7 V offset, enabling robust 3.3 V ↔ 5 V communication at ≤10 MHz.

Use Scenario: Sharpening slow-rise edges from microcontroller timers or analog comparators before clock distribution.

IC Role / Device Role / Timing Role: Series-connected switch in edge-triggered pulse generator stage.

Use Value: 4.0 ns t_RR and 300 mA IF rating support clean 5 ns pulse generation into 50 Ω loads without tailing or ringing.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast-switching diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAS16-7-F	Identical electrical specs (75 V V_R, 4.0 ns t_RR, 0.715 V V_F); same SOT23 package and marking convention	No functional difference; BAS16 is Diodes' legacy part number for identical die and construction	Select when cross-referencing legacy BOMs or sourcing from distributors listing BAS16 as primary SKU
MMBD914-7-F	Same package and pinout; slightly higher V_F (0.855 V @ 10 mA) and identical t_RR (4.0 ns), but lower IR (1.0 µA @ 75 V)	Better leakage performance suits precision analog sampling hold circuits; marginally higher forward drop affects low-voltage logic interfaces	Prefer for low-leakage analog front-ends; avoid where sub-0.75 V forward drop is required for 1.8 V logic compatibility

Compared with BAS16-7-F, MMBD4148-7-F offers identical performance and form factor; versus MMBD914-7-F, it trades 0.14 V lower forward voltage for 49 µA higher high-temp leakage-favoring digital switching over ultra-low-leakage analog sensing.

Availability

MMBD4148-7-F is available at Aetrix Electronics and suitable for high-volume consumer electronics manufacturing, industrial PLC I/O modules, and automotive body-control unit signal conditioning requiring stable component supply and consistent SMT assembly yield.

Supply support for MMBD4148-7-F 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, testing, and wafer fabrication facilities across Asia and the US.

The MMBD4148 belongs to Diodes' general-purpose switching diode product line, engineered for cost-effective, high-reliability signal routing and protection in mass-produced commercial and industrial electronics.

FAQ

Is MMBD4148-7-F suitable for automotive applications?

No-MMBD4148-7-F is not AEC-Q101 qualified. For automotive use, select the BAS16Q-7-F variant, which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities per Diodes' product definitions.

What is the maximum operating temperature for continuous use?

The MMBD4148-7-F has an operating junction temperature range of –55 °C to +150 °C. Continuous operation at +150 °C ambient requires zero power dissipation per the derating curve; at 25 °C ambient, full 350 mW power dissipation is allowed with proper PCB copper area.

Does this diode have a specified junction capacitance?

Yes-total capacitance is 2.0 pF measured at VR = 0 V and f = 1.0 MHz. This low value supports use in high-frequency signal paths up to 500 MHz without significant attenuation or phase shift in AC-coupled applications.

Can MMBD4148-7-F replace 1N4148 in SMT designs?

Yes-MMBD4148-7-F is the SOT23 surface-mount equivalent of the through-hole 1N4148, sharing identical electrical characteristics (75 V V_R, 4.0 ns t_RR, 300 mA I_F) and optimized for automated assembly instead of manual insertion.

MMBD4148-7-F 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:: Active

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-F FAQ

1.How can I place an order for MMBD4148-7-F through Aetrix?

Please submit a Request for Quotation (RFQ) for MMBD4148-7-F 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-F reliable?

The price and inventory of MMBD4148-7-F 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-F is usually 5 days.

3.What payment methods are accepted for MMBD4148-7-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4148-7-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMBD4148-7-F?

MMBD4148-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMBD4148-7-F 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-F?

For technical support, including MMBD4148-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4148-7-F requirements.

6.How does Aetrix verify that MMBD4148-7-F is sourced from the original manufacturer or authorized distributors?

All MMBD4148-7-F 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-F meets industry standards.

7.What is the process for return or replacement of MMBD4148-7-F?

All MMBD4148-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4148-7-F, 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-F part is unused and in its original packaging.

Return procedure for MMBD4148-7-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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