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Diodes Incorporated 1N4148WTQ-7
- Part No.:
- 1N4148WTQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
1N4148WTQ-7.pdf
- Description:
- DIODE GEN PURP 80V 125MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:33,173
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Product details
Overview
1N4148WTQ-7 from Diodes Incorporated is a surface-mount fast-switching silicon signal diode in SOD523 package, rated for 100 V non-repetitive peak reverse voltage, 250 mA forward surge current, and 4.0 ns reverse recovery time. It serves as a high-speed clamping, protection, and logic-level switching device in automotive infotainment power rails and USB interface ESD protection circuits.
For engineers reviewing the 1N4148WTQ-7 datasheet, 1N4148WTQ-7 pinout, 1N4148WTQ-7 application, or 1N4148WTQ-7 equivalent, key selection criteria include reverse recovery time under 4.0 ns, AEC-Q101 qualification for automotive use, SOD523 footprint compatibility, and low junction capacitance (≤2.0 pF at 0 V) for high-frequency signal integrity.
Technical Context
This diode operates as a unidirectional PN-junction switch with fast carrier recombination enabling sub-4 ns turn-off. Its design targets low-voltage digital and analog signal paths where minimal forward voltage drop (0.715 V @ 1 mA) and tight leakage control (<1.0 µA @ 75 V) are critical for signal fidelity and power efficiency.
The SOD523 package supports high-density PCB layouts while maintaining thermal resistance of 833 °C/W to ambient. AEC-Q101 qualification confirms robustness across -55 °C to +150 °C operation, with PPAP capability and IATF 16949 manufacturing compliance required for automotive subsystem integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time | 4.0 ns - Enables reliable operation in >100 MHz digital switching and pulse-clipping applications |
| Peak Reverse Voltage | 100 V - Supports transient suppression in 24 V automotive systems and industrial I/O protection |
| Forward Voltage | 0.715 V @ 1 mA - Minimizes voltage loss in low-power logic-level translation and bias networks |
| Junction Capacitance | 2.0 pF @ 0 V - Preserves signal edge integrity in high-speed data lines and RF detector inputs |
| Operating Temperature | -55 °C to +150 °C - Validated for under-hood automotive electronics and industrial motor control environments |
| Power Dissipation | 150 mW - Limits self-heating in compact SOD523 layout without forced cooling |
Pinout & Package
Package: SOD523 - ultra-compact 2-pin surface-mount plastic package (1.25 mm × 0.85 mm × 0.65 mm), cathode marked by band on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Forward current entry point | Connected to lower-potential node in clamping or rectification path; requires trace routing compatible with 0.26–0.34 mm pad width |
| 2 (Cathode) | Forward current exit / reverse blocking terminal | Marked by visible band; ties to higher-potential rail or ground reference; defines polarity-sensitive placement in ESD protection networks |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A114 |
| SOD523 footprint | Enables <0.8 mm² board area usage-ideal for space-constrained USB-C port protection and sensor module designs |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition: Br+Cl <1500 ppm, Sb <1000 ppm |
| Low reverse leakage | <1.0 µA @ 75 V, 25°C - Reduces standby power loss in always-on battery-backed circuits |
Applications
| USB 2.0 Data Line Protection | Automotive CAN Bus Termination |
|---|---|
Use Scenario: Clamping ESD transients on D+ and D− lines during hot-plug events in portable docking stations. IC Role / Device Role / Timing Role: Fast-switching clamp diode placed between data line and VBUS/GND to shunt >8 kV HBM surges within 4 ns. Use Value: Prevents damage to USB PHY ICs while preserving signal rise/fall times due to ≤2.0 pF junction capacitance. | Use Scenario: Biasing termination resistors in dual-wire CAN FD networks operating up to 5 Mbps. IC Role / Device Role / Timing Role: Isolation diode in split-rail termination circuit to prevent ground loop currents during bus arbitration. Use Value: Ensures stable common-mode voltage under load dump conditions (100 V transient) without latch-up or parametric shift. |
| Industrial PLC Digital Input Conditioning | Smartphone Camera Flash Driver Protection |
Use Scenario: Level-shifting and overvoltage protection for 24 V DC input modules interfacing with 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Signal-path isolation diode in optocoupler input stage to block reverse polarity faults. Use Value: Survives repeated 100 V transients per IEC 61000-4-5 while maintaining <1.25 V forward drop at 150 mA drive current. | Use Scenario: Reverse-polarity protection for white LED flash drivers powered from lithium-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Series protection element in high-side current path to prevent capacitor discharge backfeed during PWM dimming. Use Value: Delivers 250 mA surge capability for 100 µs pulses without degradation, supporting rapid strobe sequences. |
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 | Higher VF (0.85 V @ 1 mA); same SOD523 package; tRR = 4 ns; not AEC-Q101 qualified | Lacks automotive qualification; suitable for consumer-grade USB hubs but not under-hood modules | Select when cost sensitivity outweighs automotive compliance requirements |
| 1N4148WS-7-F | Same electrical specs; SOD323 package (larger: 1.7 mm × 1.25 mm); identical AEC-Q101 rating | Requires larger PCB footprint; better thermal dissipation (RθJA = 625 °C/W) but less dense layout | Choose when thermal margin > board area constraint in industrial motor drives |
Compared with BAS16W-7-F and 1N4148WS-7-F, the 1N4148WTQ-7 uniquely combines AEC-Q101 compliance, SOD523 miniaturization, and verified 4.0 ns tRR-making it optimal for space-limited automotive signal conditioning where qualification and speed are jointly mandatory.
Availability
1N4148WTQ-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and smartphone peripheral protection circuits requiring stable component supply and full traceability.
Supply support for 1N4148WTQ-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 centers across Asia and manufacturing in IATF 16949-certified facilities.
The 1N4148WTQ-7 belongs to Diodes' AEC-Q101-qualified fast-switching diode product line, engineered specifically for automotive signal integrity, ESD resilience, and high-reliability industrial control applications.
FAQ
What is the maximum reverse voltage rating for the 1N4148WTQ-7?
The 1N4148WTQ-7 has a non-repetitive peak reverse voltage (VRM) rating of 100 V and a continuous reverse voltage (VR) rating of 80 V. These values are specified at TA = +25°C and define safe operating limits for transient suppression and steady-state blocking in automotive and industrial circuits.
Is the 1N4148WTQ-7 suitable for high-frequency signal routing?
Yes-the 1N4148WTQ-7 exhibits ≤2.0 pF junction capacitance at 0 V reverse bias and 4.0 ns reverse recovery time, making it appropriate for signal routing up to 100 MHz in USB 2.0, CAN FD, and sensor interface applications where minimal capacitive loading and fast turn-off are essential.
How does the SOD523 package affect thermal performance?
The SOD523 package delivers 833 °C/W junction-to-ambient thermal resistance on standard FR-4 PCBs with recommended pad layout. This limits continuous power dissipation to 150 mW at +25°C ambient, requiring derating above 25°C per the published curve-critical for sustained operation in enclosed automotive enclosures.
Does the 1N4148WTQ-7 require special handling for moisture sensitivity?
No-the 1N4148WTQ-7 is rated Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/85% RH and does not require dry-packaging or baking prior to reflow soldering, simplifying assembly for high-volume SMT lines.
1N4148WTQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 80 V
- Current - Average Rectified (Io):
- 125mA
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4148WTQ-7 FAQ
1.How can I place an order for 1N4148WTQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148WTQ-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 1N4148WTQ-7 reliable?
The price and inventory of 1N4148WTQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148WTQ-7 is usually 5 days.
3.What payment methods are accepted for 1N4148WTQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148WTQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148WTQ-7?
1N4148WTQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148WTQ-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 1N4148WTQ-7?
For technical support, including 1N4148WTQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148WTQ-7 requirements.
6.How does Aetrix verify that 1N4148WTQ-7 is sourced from the original manufacturer or authorized distributors?
All 1N4148WTQ-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 1N4148WTQ-7 meets industry standards.
7.What is the process for return or replacement of 1N4148WTQ-7?
All 1N4148WTQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148WTQ-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 1N4148WTQ-7 part is unused and in its original packaging.
Return procedure for 1N4148WTQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148WTQ-7 Tags
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