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Diodes Incorporated MMBD4448HT-7
- Part No.:
- MMBD4448HT-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- -
- Datasheet:
-
MMBD4448HT-7.pdf
- Description:
- DIODE GEN PURP 80V 250MA SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:5,601
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Product details
Overview
MMBD4448HT-7 from Diodes Incorporated is a surface-mount fast-switching silicon switching diode in SOT523 package, rated for 80 V peak repetitive reverse voltage, 500 mA forward current, and 4.0 ns reverse recovery time. It delivers high conductance with VF = 0.72 V at IF = 10 mA and low junction-to-ambient thermal resistance (833 °C/W), enabling use in compact DC-DC converter snubbers and high-frequency signal routing.
For engineers reviewing the MMBD4448HT-7 datasheet, MMBD4448HT-7 pinout, MMBD4448HT-7 application, or MMBD4448HT-7 equivalent, key selection criteria include ultra-fast trr (≤4.0 ns), low VF at moderate IF, tight capacitance control (CT = 3.5 pF @ 6 V), and automotive-grade process compatibility per AEC-Q101 qualification readiness.
Technical Context
This diode operates as a unidirectional, low-capacitance, fast-recovery switching element optimized for high-speed digital logic interfacing and flyback energy clamping. Its 3.5 pF total capacitance at 6 V and 1.0 MHz enables minimal signal distortion in 10–100 MHz clock line steering applications.
The device uses a planar epitaxial silicon structure with alloy 42 leadframe and matte tin plating, supporting reflow soldering per MIL-STD-202 Method 208. Thermal derating begins at 25 °C ambient, with full 150 mW power dissipation only achievable below 25 °C per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRM | 100 V non-repetitive peak reverse voltage - supports transient overvoltage tolerance beyond nominal 80 V working rating |
| trr | 4.0 ns reverse recovery time - enables clean switching in >25 MHz pulse circuits without tail current interference |
| VF @ 10 mA | 0.72 V forward voltage - reduces conduction loss in low-voltage logic-level clamp networks |
| CT @ 6 V | 3.5 pF total capacitance - maintains signal integrity in RF-coupled bias networks and high-speed data lines |
| RθJA | 833 °C/W junction-to-ambient thermal resistance - requires careful PCB copper area allocation for sustained 500 mA operation |
| IFSM | 4.0 A non-repetitive surge current - withstands brief inductive kick events in relay driver or solenoid interface circuits |
Pinout & Package
Package: SOT523 - ultra-small plastic surface-mount package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, UL 94V-0 rated molding compound, matte tin-plated alloy 42 leadframe.
| 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 / reverse blocking terminal | Connected to lower-potential node; defines directionality for ESD protection and clamping paths |
| Case / Exposed Pad (Pin 3) | Thermal and mechanical anchor | Not electrically connected; provides mechanical stability and limited heat spreading via PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast switching | 4.0 ns trr enables reliable operation in >25 MHz digital signal routing and pulse shaping |
| Low forward voltage | 0.72 V @ 10 mA minimizes voltage drop in logic-level translation and level-shifting diode arrays |
| Low junction capacitance | 3.5 pF @ 6 V preserves bandwidth in RF detector and high-speed sampling gate circuits |
| AEC-Q101 readiness | Manufactured in IATF 16949-certified facilities with PPAP capability - supports automotive infotainment and body electronics qualification paths |
Applications
| High-Speed Logic Clamping | DC-DC Converter Snubber |
|---|---|
Use Scenario: Protecting CMOS input pins from overshoot/undershoot during hot-swap or bus contention events. IC Role / Device Role / Timing Role: Fast-clamp diode placed between signal line and rail, conducting only during transient excursions beyond VDD or GND. Use Value: 4.0 ns trr prevents latch-up by limiting transient duration; 3.5 pF CT avoids loading <10 pF high-impedance logic nodes. | Use Scenario: Suppressing voltage spikes across MOSFET drains in buck/boost converters operating at 500 kHz–2 MHz. IC Role / Device Role / Timing Role: Passive snubber diode in RCD network, conducting only during switch-off transition to absorb leakage inductance energy. Use Value: Low VF (0.72 V @ 10 mA) reduces conduction loss in snubber path; 80 V VRRM covers typical 24 V system transients. |
| RF Signal Routing | Automotive Sensor Interface |
Use Scenario: Steering RF signals between antenna paths in 2.4 GHz ISM-band front-end modules. IC Role / Device Role / Timing Role: PIN-diode-like switching element biased into forward conduction to route RF, or reverse-biased for isolation. Use Value: 3.5 pF CT ensures minimal insertion loss at 2.4 GHz; SOT523 footprint allows dense layout near RF traces. | Use Scenario: Level-shifting and fault protection for analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Bidirectional ESD clamp and overvoltage limiter on sensor signal lines routed through harsh under-hood environments. Use Value: AEC-Q101 manufacturing readiness and -55 °C to +150 °C TJ range ensure reliability in extended temperature automotive domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54C-7-F | Higher VF (0.85 V @ 10 mA), same SOT523 package, 30 V VRRM | Limited to ≤30 V systems; unsuitable for 48 V industrial or 24 V automotive clamping | Select when lower cost is prioritized and voltage stress remains <30 V |
| 1N4148W-7-F | Higher trr (4.0 ns typical but up to 8.0 ns max), SOD-123 package (larger footprint), 100 V VRRM | Slower worst-case switching; incompatible with ultra-dense SOT523 layouts | Select when board space permits larger package and tighter trr distribution is not required |
Compared with BAT54C-7-F and 1N4148W-7-F, MMBD4448HT-7 uniquely balances 80 V VRRM, 4.0 ns trr, and SOT523 size-making it optimal for space-constrained, medium-voltage, high-frequency switching where both speed and voltage margin matter.
Availability
MMBD4448HT-7 is available at Aetrix Electronics and suitable for high-frequency signal routing, DC-DC snubbing, and automotive sensor interface designs requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for MMBD4448HT-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 MMBD4448HT-7 belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-speed digital and power conversion applications demanding low capacitance, rapid recovery, and robust thermal performance in miniature packages.
FAQ
Is MMBD4448HT-7 qualified to AEC-Q101?
No, MMBD4448HT-7 itself is not AEC-Q101 certified, but it is manufactured in IATF 16949-certified facilities with PPAP capability and supports automotive qualification pathways. Customers requiring formal AEC-Q101 certification should specify MMBD4448HTA-7-F or contact Diodes for qualified variants.
What is the maximum continuous forward current at 85°C ambient?
Per the power derating curve (Fig. 1), at 85°C ambient, the allowable power dissipation drops to ~75 mW. With VF ≈ 0.72 V at 10 mA, the practical continuous IF at 85°C is approximately 104 mA - calculated as PD / VF = 75 mW / 0.72 V - assuming no additional PCB copper heatsinking.
Can MMBD4448HT-7 replace 1N4148 in SOT-23 footprint designs?
No - MMBD4448HT-7 uses SOT523 (1.6 × 1.6 mm), while 1N4148 in SOT-23 measures 2.9 × 1.3 mm. The footprints are mechanically incompatible. For SOT-23-compatible alternatives, consider Diodes' 1N4148W-7-F or BAV99-7-F.
Does this diode support reflow soldering per JEDEC J-STD-020?
Yes - MMBD4448HT-7 has Moisture Sensitivity Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and is compatible with standard Pb-free reflow profiles (peak 260°C), provided the recommended pad layout from Diodes' package outline documentation is followed.
MMBD4448HT-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- -
- Current - Average Rectified (Io):
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Speed:
- -
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- -
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
- Operating Temperature - Junction:
- -
MMBD4448HT-7 FAQ
1.How can I place an order for MMBD4448HT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4448HT-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 MMBD4448HT-7 reliable?
The price and inventory of MMBD4448HT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4448HT-7 is usually 5 days.
3.What payment methods are accepted for MMBD4448HT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4448HT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4448HT-7?
MMBD4448HT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4448HT-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 MMBD4448HT-7?
For technical support, including MMBD4448HT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4448HT-7 requirements.
6.How does Aetrix verify that MMBD4448HT-7 is sourced from the original manufacturer or authorized distributors?
All MMBD4448HT-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 MMBD4448HT-7 meets industry standards.
7.What is the process for return or replacement of MMBD4448HT-7?
All MMBD4448HT-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4448HT-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 MMBD4448HT-7 part is unused and in its original packaging.
Return procedure for MMBD4448HT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4448HT-7 Tags
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1N4448X-TP
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