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Diodes Incorporated MMBD4148W-7-F
- Part No.:
- MMBD4148W-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBD4148W-7-F.pdf
- Description:
- DIODE GEN PURP 75V 150MA SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:35,703
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Product details
Overview
MMBD4148W-7-F from Diodes Incorporated is a surface-mount fast-switching silicon switching diode in SOT323 package, rated for 75 V peak repetitive reverse voltage, 300 mA forward current, and 4.0 ns reverse recovery time. It delivers high conductance with VF = 0.715 V at IF = 1.0 mA and low junction-to-ambient thermal resistance (625 °C/W), enabling use in compact DC-DC converter feedback paths and signal clamping circuits.
For engineers reviewing the MMBD4148W-7-F datasheet, MMBD4148W-7-F pinout, MMBD4148W-7-F application, or MMBD4148W-7-F equivalent, key selection criteria include reverse recovery speed, low forward voltage at low currents, thermal derating behavior, and SOT323 footprint compatibility in space-constrained PCB layouts.
Technical Context
This diode employs a planar epitaxial construction optimized for fast minority-carrier recombination, achieving trr ≤ 4.0 ns under IF = IR = 10 mA, RL = 100 Ω test conditions. Its low CT ≤ 2.0 pF at VR = 0 V, f = 1 MHz supports high-frequency signal routing without parasitic loading.
The device operates across –55 °C to +150 °C and exhibits IR ≤ 1.0 µA at VR = 75 V, TA = 25 °C, ensuring stable blocking performance in industrial power management and logic-level translation interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 100 V non-repetitive peak reverse voltage - defines absolute maximum transient overvoltage tolerance |
| VRRM | 75 V peak repetitive reverse voltage - sets continuous AC/DC blocking capability in rectifier or clamp roles |
| IFM | 300 mA forward current - supports moderate-current switching in logic interface and protection circuits |
| trr | 4.0 ns reverse recovery time - enables operation up to ~80 MHz in high-speed switching applications |
| VF | 0.715 V at IF = 1.0 mA - ensures minimal voltage drop in low-current bias and sensing paths |
| CT | 2.0 pF at VR = 0 V, f = 1 MHz - limits capacitive loading on high-speed digital or RF signal lines |
| RθJA | 625 °C/W - requires careful PCB copper area design to maintain TJ < 150 °C at PD = 200 mW |
Pinout & Package
Package: SOT323 - ultra-small plastic surface-mount package (2.15 mm × 2.10 mm × 0.95 mm), lead-free matte tin-plated terminals, moisture sensitivity level 1 per J-STD-020D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node in forward-biased operation; polarity-marked side of top-view marking "KA2" |
| Cathode (Pin 2) | Forward current exit / reverse-blocking terminal | Connected to lower-potential node; internally tied to substrate; marked by bar on top of date code "Y" |
| Collector / Heat Sink (Pin 3) | Thermal and mechanical anchor | Non-electrical terminal; soldered to PCB copper pour for thermal conduction and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | trr ≤ 4.0 ns enables clean edge transitions in 20–80 MHz clock distribution and pulse shaping |
| Ultra-small SOT323 footprint | 2.15 mm × 2.10 mm area saves >60% board space vs. SOT23 in dense mixed-signal layouts |
| High conductance at low current | VF = 0.715 V @ 1 mA supports accurate biasing in precision reference and sensor interface circuits |
| Low leakage at elevated temperature | IR ≤ 50 µA @ VR = 75 V, TJ = +150 °C maintains reliability in under-hood automotive modules |
Applications
| Logic-Level Clamping | DC-DC Converter Feedback |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from ESD-induced overshoot during hot-plug events. IC Role / Device Role / Timing Role: Fast-clamp diode shunting transient energy to ground before voltage exceeds absolute maximum ratings. Use Value: 4.0 ns trr ensures clamping activation within first 10 ns of fast-rising transients, limiting overshoot to < 0.5 V above rail. | Use Scenario: Providing isolated voltage feedback path from secondary-side output to primary-side PWM controller in flyback converters. IC Role / Device Role / Timing Role: High-speed rectifier in optocoupler-based feedback loop, transmitting error signal across isolation barrier. Use Value: Low VF drift with temperature and 2.0 pF CT minimize phase shift and delay in control-loop response. |
| Signal Demodulation | High-Speed Logic Interface |
Use Scenario: Envelope detection in 10–30 MHz RF receiver front-ends for IoT sensor nodes. IC Role / Device Role / Timing Role: Passive demodulator diode converting AM-modulated carrier into baseband envelope waveform. Use Value: 2.0 pF CT and sub-1 V VF preserve signal fidelity and SNR in low-power narrowband receivers. | Use Scenario: Level-shifting between 1.8 V FPGA I/O banks and 3.3 V peripheral buses in portable instrumentation. IC Role / Device Role / Timing Role: Bidirectional voltage translator using back-to-back configuration for open-drain signaling. Use Value: Matched VF and symmetric trr ensure <1 ns skew between rising/falling edges in 25–50 MHz data streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS16W-7-F | Identical electrical specs, same SOT323 package, dual-marking variant per DS30094 Rev. 13 | No functional difference; used interchangeably in production where dual-part-number sourcing is required | Select when cross-qualified BOMs or second-source validation is mandated |
| 1N4148WS-7-F | Slightly higher VF (0.725 V @ 1 mA), identical trr (4 ns), same SOT323 package and RoHS/Green compliance | Marginally reduced efficiency in low-current bias networks; otherwise drop-in compatible | Prefer for legacy designs already qualified with 1N4148 family footprint and test fixtures |
Compared with BAS16W-7-F, MMBD4148W-7-F offers identical performance but distinct traceability via KA2 marking; versus 1N4148WS-7-F, it provides marginally lower forward voltage at 1 mA, improving accuracy in precision analog biasing.
Availability
MMBD4148W-7-F is available at Aetrix Electronics and suitable for logic-level clamping, DC-DC converter feedback, and high-speed signal demodulation requiring stable component supply across industrial automation, medical instrumentation, and consumer electronics programs.
Supply support for MMBD4148W-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, manufacturing, and sales operations across Asia, Europe, and North America.
The MMBD4148W belongs to Diodes' general-purpose fast-switching diode product line, engineered for high-volume, space-constrained applications demanding consistent trr, low VF, and robust thermal performance in ambient temperatures up to +150 °C.
FAQ
Is MMBD4148W-7-F suitable for automotive applications?
No - MMBD4148W-7-F is not AEC-Q200 qualified. Diodes offers automotive-grade variants such as MMBD4148WQ-7-F (AEC-Q200 Grade 1) with PPAP documentation, IATF 16949 manufacturing, and extended temperature validation. Standard MMBD4148W-7-F is intended for commercial and industrial use only.
What is the maximum allowable junction temperature during continuous operation?
The absolute maximum junction temperature is +150 °C. At TA = +85 °C, the device can dissipate up to 125 mW before reaching TJ(max), based on RθJA = 625 °C/W and the linear derating curve in Figure 1. Exceeding this requires thermal simulation or measured board-level thermal resistance verification.
How does the SOT323 package affect soldering process compatibility?
The SOT323 package uses matte tin-plated alloy 42 leads and complies with JEDEC J-STD-020D Level 1 moisture sensitivity. It supports standard reflow profiles (peak 260 °C, 20–40 sec), but requires precise stencil aperture (0.47 mm × 0.60 mm) and alignment due to 0.65 mm pin pitch and small pad geometry per Diodes' recommended layout.
Can MMBD4148W-7-F replace 1N4148 in existing designs?
Yes - MMBD4148W-7-F is a direct SOT323 surface-mount replacement for through-hole 1N4148, matching key parameters (VRRM = 75 V, trr = 4 ns, VF ≈ 0.715 V @ 1 mA). However, PCB layout must be updated to SOT323 footprint, and thermal design must account for higher power density and different RθJA.
MMBD4148W-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 150mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 150 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- 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-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
MMBD4148W-7-F FAQ
1.How can I place an order for MMBD4148W-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4148W-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 MMBD4148W-7-F reliable?
The price and inventory of MMBD4148W-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 MMBD4148W-7-F is usually 5 days.
3.What payment methods are accepted for MMBD4148W-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4148W-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4148W-7-F?
MMBD4148W-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4148W-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 MMBD4148W-7-F?
For technical support, including MMBD4148W-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4148W-7-F requirements.
6.How does Aetrix verify that MMBD4148W-7-F is sourced from the original manufacturer or authorized distributors?
All MMBD4148W-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 MMBD4148W-7-F meets industry standards.
7.What is the process for return or replacement of MMBD4148W-7-F?
All MMBD4148W-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4148W-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 MMBD4148W-7-F part is unused and in its original packaging.
Return procedure for MMBD4148W-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4148W-7-F 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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