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Diodes Incorporated 1N4448WSFQ-7
- Part No.:
- 1N4448WSFQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
1N4448WSFQ-7.pdf
- Description:
- DIODE GEN PURP 75V 500MA SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:2,724
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Product details
Overview
1N4448WSFQ-7 from Diodes Incorporated is an automotive-grade, surface-mount fast-switching silicon switching diode in SOD323F package, rated for 75 V peak repetitive reverse voltage, 500 mA forward current, and 4.0 ns reverse recovery time, used in high-frequency signal clamping and waveform shaping circuits in engine control units and ADAS sensor interfaces.
For engineers reviewing the 1N4448WSFQ-7 datasheet, 1N4448WSFQ-7 pinout, 1N4448WSFQ-7 application, or 1N4448WSFQ-7 equivalent, key selection criteria include trr ≤ 4.0 ns, IR ≤ 25 nA at VR = 20 V, CT ≤ 4.0 pF at f = 1 MHz, AEC-Q101 qualification, and SOD323F thermal performance with RθJA = 313 °C/W on FR-4.
Technical Context
This diode operates as a unidirectional, low-capacitance, fast-recovery rectifier optimized for high-speed digital and analog signal routing. Its 4.0 ns trr enables clean edge transitions in 10–50 MHz clock distribution and data line protection, while its 25 nA leakage at 20 V supports precision bias networks in automotive sensor front-ends.
The SOD323F package features flat leads for enhanced thermal conduction and a cathode band marking for unambiguous polarity identification. It is qualified to AEC-Q101 with operating temperature range of −65 °C to +150 °C and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time (trr) | ≤ 4.0 ns - Enables reliable operation in >20 MHz switching applications without tail current distortion |
| Peak Repetitive Reverse Voltage (VRRM) | 75 V - Supports 24 V automotive supply rail transients with 3× safety margin |
| Forward Current (IFM) | 500 mA - Handles pulsed logic-level clamp currents in CAN/LIN bus interface protection |
| Leakage Current (IR) | ≤ 25 nA at VR = 20 V - Maintains signal integrity in high-impedance bias and reference paths |
| Total Capacitance (CT) | ≤ 4.0 pF at VR = 0 V, f = 1 MHz - Minimizes loading on RF-sensitive timing and oscillator nodes |
| Thermal Resistance (RθJA) | 313 °C/W - Requires minimal PCB copper area for thermal management in space-constrained modules |
| AEC-Q101 Qualification | Qualified - Meets stress test requirements for automotive electronics including temperature cycling and HTRB |
Pinout & Package
Package: SOD323F - ultra-small surface-mount plastic case (2.50 mm × 1.25 mm × 0.90 mm), flat lead terminals, matte tin finish over copper alloy, UL 94V-0 rated molding compound, cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node in clamping or steering configurations; requires no external polarity marking |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to higher-potential node or ground return; band orientation ensures correct placement on automated assembly lines |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | trr ≤ 4.0 ns - Reduces switching loss and signal distortion in 10–50 MHz digital signal paths |
| Low leakage current | IR ≤ 25 nA at VR = 20 V - Preserves accuracy in high-Z analog sensing and reference divider networks |
| Low junction capacitance | CT ≤ 4.0 pF - Limits capacitive loading on high-frequency clock and RF signal lines |
| AEC-Q101 qualification | Automotive reliability validated - Suitable for under-hood ECU, body control, and ADAS subsystems |
| Green RoHS compliance | Lead-, halogen-, and antimony-free - Meets EU ELV and automotive OEM environmental directives |
Applications
| Engine Control Unit (ECU) Signal Clamping | ADAS Radar Front-End Protection |
|---|---|
Use Scenario: Clamping transient spikes on 5 V microcontroller I/O lines exposed to inductive load switching in engine valve control circuits. IC Role / Device Role / Timing Role: Fast-switching diode providing bidirectional overvoltage protection with sub-5 ns response to suppress >100 ns ringing. Use Value: Prevents latch-up and ESD damage while maintaining signal fidelity up to 25 MHz due to 4.0 ns trr and 4.0 pF CT. | Use Scenario: Protecting low-noise amplifier inputs in 77 GHz radar receivers from RF coupling and power-on surge events. IC Role / Device Role / Timing Role: Low-capacitance shunt diode placed at LNA input to divert transients without degrading noise figure or bandwidth. Use Value: 4.0 pF capacitance avoids resonance shift in 77 GHz matching networks; 25 nA leakage preserves DC bias stability. |
| Infotainment CAN Bus Termination | Body Control Module (BCM) Level Shifting |
Use Scenario: Providing fail-safe termination and ESD suppression on CAN_H/CAN_L lines in head unit communication interfaces. IC Role / Device Role / Timing Role: Dual-diode configuration (with companion) acting as transient voltage suppressor and common-mode filter element. Use Value: 75 V VRRM withstands battery dump events; AEC-Q101 rating ensures long-term reliability across thermal cycles. | Use Scenario: Level-shifting 3.3 V microcontroller GPIO signals to drive 12 V solenoid drivers in door lock actuation circuits. IC Role / Device Role / Timing Role: High-speed switching diode enabling fast turn-off of pull-up/pull-down networks during state transitions. Use Value: 4.0 ns trr reduces transition delay to <10 ns, supporting 100 kHz PWM modulation without duty cycle distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAT54CQ-7-F | Schottky architecture; VF ≈ 0.33 V @ 10 mA; trr not specified (inherently faster); VRRM = 30 V | Limited to ≤30 V systems; unsuitable for 75 V transients in 24 V automotive rails | Select only where low forward drop outweighs reverse voltage requirement and trr is secondary |
| 1N4148WQ-7-F | Same silicon process but commercial grade; VRRM = 100 V; trr ≤ 4.0 ns; not AEC-Q101 qualified | Not approved for automotive production; may require additional qualification testing for ECU use | Acceptable for prototyping or non-safety-critical interior modules with internal validation |
Compared with BAT54CQ-7-F and 1N4148WQ-7-F, the 1N4448WSFQ-7 uniquely combines 75 V VRRM, 4.0 ns trr, and AEC-Q101 qualification-making it the only drop-in solution for production automotive signal conditioning where both transient robustness and high-speed fidelity are mandatory.
Availability
1N4448WSFQ-7 is available at Aetrix Electronics and suitable for engine control units, ADAS radar modules, and body control modules requiring stable component supply with guaranteed automotive-grade traceability and lifecycle continuity.
Supply support for 1N4448WSFQ-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, specializing in high-reliability components for automotive, industrial, and computing markets.
The 1N4448WSFQ-7 belongs to Diodes' AEC-Q101-qualified fast-switching diode product line, engineered specifically for automotive signal integrity, ESD protection, and high-frequency clamping in harsh-temperature environments.
FAQ
What is the maximum junction temperature for continuous operation?
The 1N4448WSFQ-7 has a maximum junction temperature of +150 °C and minimum storage temperature of −65 °C. Derating begins above +25 °C ambient, with full 400 mW power dissipation only at TA ≤ 25 °C; at +85 °C ambient, allowable power drops to approximately 200 mW per the forward current derating curve.
Is the SOD323F package compatible with standard reflow profiles?
Yes-the SOD323F package is rated for moisture sensitivity level 1 per J-STD-020 and supports standard lead-free reflow profiles (peak temperature ≤ 260 °C). Its flat-lead construction ensures uniform thermal transfer and minimizes tombstoning risk on fine-pitch PCB layouts.
How does the 1N4448WSFQ-7 differ from the commercial 1N4448WSF-7?
The 1N4448WSFQ-7 adds AEC-Q101 qualification-including extended temperature cycling, high-temperature reverse bias, and accelerated life testing-while sharing identical electrical specs and SOD323F packaging with the commercial 1N4448WSF-7. The "Q" suffix denotes automotive-grade screening and traceability.
Can this diode be used in place of a 1N4148 in automotive designs?
No-although electrically similar, the 1N4148 lacks AEC-Q101 qualification and has different thermal resistance and leakage behavior at elevated temperatures. The 1N4448WSFQ-7 is specifically characterized and screened for automotive use, including 150 °C operation and humidity exposure testing required for under-hood deployment.
1N4448WSFQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 75 V
- Current - Average Rectified (Io):
- 500mA
- 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:
- 2.5 µA @ 75 V
- Capacitance @ Vr, F:
- 4pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4448WSFQ-7 FAQ
1.How can I place an order for 1N4448WSFQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4448WSFQ-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 1N4448WSFQ-7 reliable?
The price and inventory of 1N4448WSFQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4448WSFQ-7 is usually 5 days.
3.What payment methods are accepted for 1N4448WSFQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4448WSFQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4448WSFQ-7?
1N4448WSFQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4448WSFQ-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 1N4448WSFQ-7?
For technical support, including 1N4448WSFQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4448WSFQ-7 requirements.
6.How does Aetrix verify that 1N4448WSFQ-7 is sourced from the original manufacturer or authorized distributors?
All 1N4448WSFQ-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 1N4448WSFQ-7 meets industry standards.
7.What is the process for return or replacement of 1N4448WSFQ-7?
All 1N4448WSFQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4448WSFQ-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 1N4448WSFQ-7 part is unused and in its original packaging.
Return procedure for 1N4448WSFQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4448WSFQ-7 Tags
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1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
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1N4148TR
onsemi
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MMSD4148T1G
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MMBD914LT3G
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BAS16HT1G
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1N914BWT
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BAS21LT1G
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LL4148
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BAS16LT1G
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MMSD914T1G
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BAV21W-7-F
Diodes Incorporated
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