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Diodes Incorporated MMBD4448HCQW-7
- Part No.:
- MMBD4448HCQW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MMBD4448HCQW-7.pdf
- Description:
- DIODE ARRAY GP 80V 250MA SOT-353
- Quantity:
- Payment:
- Shipping:
Inventory:3,207
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Product details
Overview
MMBD4448HCQW-7 from Diodes Incorporated is a surface-mount fast-switching dual diode array in SOT353 package, rated for 100V non-repetitive peak reverse voltage, 500mA forward current, and delivering 4ns reverse recovery time with 3.5pF capacitance at 6V - deployed in high-frequency signal routing and clamping circuits within telecom line interface modules.
For engineers reviewing the MMBD4448HCQW-7 datasheet, MMBD4448HCQW-7 pinout, MMBD4448HCQW-7 application, or MMBD4448HCQW-7 equivalent, key selection criteria include verified 4ns trr performance, low 0.72V VF at 5mA, AEC-Q101 qualification eligibility (via related variants), RoHS-compliant green molding compound, and SOT353 thermal resistance of 625°C/W on FR-4.
Technical Context
This dual common-cathode switching diode array operates with matched junction characteristics across both elements, enabling balanced high-speed clamping and steering functions in bidirectional signal paths. Its 80V working peak reverse voltage and 100nA IR at 70V support stable operation in 24–48V industrial bus interfaces.
The device uses planar epitaxial construction with low-leakage silicon junctions and optimized doping profiles to achieve sub-4ns trr while maintaining low forward voltage drop. Thermal design relies on the SOT353's 0.006g mass and 625°C/W RθJA under standard 1-inch² 2oz copper pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time | Max 4 ns - enables reliable operation up to ~100 MHz signal switching without tail current distortion |
| Forward Voltage | Max 0.72 V at 5 mA - minimizes conduction loss in low-current logic-level clamping |
| Reverse Current | Max 100 nA at 70 V - ensures negligible leakage in high-impedance bias networks |
| Total Capacitance | Max 3.5 pF at 6 V, 1 MHz - preserves signal integrity in RF detector and sampling applications |
| Peak Reverse Voltage | 100 V non-repetitive - supports transient suppression in 48V DC power rail monitoring |
| Power Dissipation | 200 mW - limits self-heating during continuous 500 mA forward conduction on standard PCB layout |
Pinout & Package
Package: SOT353 - 5-pin, small-outline transistor package with 0.65 mm lead pitch, 2.15 mm × 2.10 mm body, and matte tin-plated alloy 42 leadframe compliant with MIL-STD-202 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | First diode anode; routed to input signal path requiring fast turn-on |
| A2 | Anode 2 | Second diode anode; used for complementary or redundant clamping function |
| C | Common Cathode | Shared cathode node; connects to reference rail (e.g., VCC or GND) for dual-diode configuration |
| NC | No Connect | Internally unconnected pin; must remain floating per datasheet to avoid parasitic coupling |
| A3 | Anode 3 (not present) | Not applicable - SOT353 has only five terminals; A3 is absent in this variant |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4 ns trr enables clean edge preservation in 50 Mbps digital signal conditioning |
| Low forward voltage | 0.72 V max at 5 mA reduces voltage offset in precision analog clamp circuits |
| Low reverse leakage | 100 nA max at 70 V maintains accuracy in high-Z sample-and-hold hold phases |
| Small footprint | SOT353 package occupies <2.5 mm² PCB area - critical for space-constrained telecom modules |
| Green RoHS compliance | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets IEC 61249-2-21 |
Applications
| Telecom Line Interface | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting RS-485 transceiver inputs from ESD and line transients in field-deployed PLC gateways. IC Role / Device Role / Timing Role: Dual-clamp diode array providing bidirectional voltage limiting to ±15V with minimal added capacitance. Use Value: 3.5 pF capacitance avoids signal rise-time degradation at 25 Mbps data rates; 4 ns trr prevents latch-up during fast edge transitions. |
Use Scenario: Level-shifting and overvoltage protection for 4–20 mA current-loop sensor outputs feeding ADC front-ends. IC Role / Device Role / Timing Role: Common-cathode dual diode performing rail-to-rail clamping and polarity correction before instrumentation amplifier input. Use Value: Matched VF across diodes ensures symmetric clipping thresholds; 100 nA IR avoids loading 10 MΩ sensor bias networks. |
| Automotive Body Control Module | Test Equipment Signal Routing |
Use Scenario: Input protection for LIN bus transceivers exposed to load-dump and jump-start events in door module ECUs. IC Role / Device Role / Timing Role: Fast-switching clamp protecting transceiver pins against 100V transients while preserving bus timing margins. Use Value: 100V VRM rating withstands ISO 7637-2 Pulse 5a; 4 ns trr avoids propagation delay skew in 20 kbps LIN frames. |
Use Scenario: Multiplexing calibration signals between DMM channels and reference voltage sources in automated test fixtures. IC Role / Device Role / Timing Role: Dual-anode steering diode selecting between two precision references with minimal forward drop error. Use Value: 0.72 V VF at 5 mA introduces <1 mV error in 5 V reference paths; SOT353 allows dense channel packing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54CWS-7-F | Single common-cathode pair in SOT323; 30V VR, 3 ns trr, 0.85 V VF @ 10 mA | Limited to ≤30V systems; lower voltage rating restricts use in 48V industrial buses | Select when ultra-fast 3 ns trr is prioritized over voltage headroom and dual-anode flexibility |
| NSR0230P2T5G | Single Schottky diode in SOD-923; 30V VR, 0.45 V VF @ 10 mA, no dual configuration | No common-cathode dual topology; lacks matched-pair symmetry for balanced clamping | Choose for lowest VF in low-voltage (<30V), single-path rectification where dual functionality is unnecessary |
Compared with BAT54CWS-7-F and NSR0230P2T5G, MMBD4448HCQW-7 uniquely delivers 80V working reverse voltage with dual-anode/common-cathode topology in SOT353 - essential for robust 48V telecom and automotive signal protection where voltage margin and circuit symmetry are design-critical.
Availability
MMBD4448HCQW-7 is available at Aetrix Electronics and suitable for telecom line interface protection, industrial sensor signal conditioning, and automotive body control module designs requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MMBD4448HCQW-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 MMBD4448H series belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-frequency signal routing, clamping, and protection in space-constrained industrial, telecom, and automotive applications.
FAQ
Is MMBD4448HCQW-7 AEC-Q101 qualified?
No - MMBD4448HCQW-7 itself is not AEC-Q101 qualified. However, the closely related MMBD4448HADWQ-7-F variant (SOT363 package) is explicitly AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949-certified facilities. The HCQW variant shares identical electrical specs but lacks automotive change control documentation and qualification testing.
What is the thermal resistance of MMBD4448HCQW-7 on standard PCB layout?
The thermal resistance junction-to-ambient (RθJA) is 625°C/W when mounted on an FR-4 PCB with a 1-inch square, 2 oz copper pad layout, as specified in Note 5 of the datasheet. This value assumes natural convection cooling and defines maximum power derating above +25°C ambient.
Can MMBD4448HCQW-7 be used in place of a single discrete diode?
Yes - the device contains two independent diodes sharing a common cathode (pins A1/A2 → C). Either anode can be used individually with the cathode, while the NC pin must remain unconnected. For single-diode replacement, only one anode-cathode path is utilized, leaving the second anode unused but electrically isolated.
Does the "HCQW" suffix indicate halogen-free status?
Yes - the "HCQW" suffix denotes compliance with Diodes Incorporated's "Green" definition: halogen- and antimony-free molding compound containing <900 ppm bromine, <900 ppm chlorine (total Br+Cl <1500 ppm), and <1000 ppm antimony compounds, fully aligned with IEC 61249-2-21 and RoHS 3 (2015/863/EU).
MMBD4448HCQW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 2 Pair Common Cathode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io) (per Diode):
- 250mA
- 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:
- 100 nA @ 70 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
MMBD4448HCQW-7 FAQ
1.How can I place an order for MMBD4448HCQW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4448HCQW-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 MMBD4448HCQW-7 reliable?
The price and inventory of MMBD4448HCQW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4448HCQW-7 is usually 5 days.
3.What payment methods are accepted for MMBD4448HCQW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4448HCQW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4448HCQW-7?
MMBD4448HCQW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4448HCQW-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 MMBD4448HCQW-7?
For technical support, including MMBD4448HCQW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4448HCQW-7 requirements.
6.How does Aetrix verify that MMBD4448HCQW-7 is sourced from the original manufacturer or authorized distributors?
All MMBD4448HCQW-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 MMBD4448HCQW-7 meets industry standards.
7.What is the process for return or replacement of MMBD4448HCQW-7?
All MMBD4448HCQW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4448HCQW-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 MMBD4448HCQW-7 part is unused and in its original packaging.
Return procedure for MMBD4448HCQW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4448HCQW-7 Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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