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Diodes Incorporated 1N4148WSQ-7-F
- Part No.:
- 1N4148WSQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
1N4148WSQ-7-F.pdf
- Description:
- DIODE GEN PURP 75V 150MA SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,803
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Product details
Overview
1N4148WSQ-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount fast switching diode in SOD323 package, rated for 75 V peak repetitive reverse voltage, 300 mA forward current, and 4.0 ns reverse recovery time, used for high-speed signal clamping and logic-level translation in automotive control modules.
For engineers reviewing the 1N4148WSQ-7-F datasheet, 1N4148WSQ-7-F pinout, 1N4148WSQ-7-F application, or 1N4148WSQ-7-F equivalent, key selection criteria include reverse recovery time, junction-to-ambient thermal resistance (625 °C/W), automotive qualification status, and SOD323 footprint compatibility with space-constrained PCB layouts.
Technical Context
This diode implements a planar epitaxial silicon PN junction optimized for rapid carrier recombination, enabling sub-4 ns reverse recovery under 10 mA IF/IR conditions with 100 Ω load. Its low 2.0 pF capacitance at 0 V bias supports high-frequency signal integrity in digital interface protection circuits.
The device operates across –55 °C to +150 °C, with thermal derating beginning at 25 °C ambient and full power dissipation (200 mW) limited to that temperature. Polarity is marked by a cathode band on the SOD323 package body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRMS | 53 V - Enables safe operation in 36 V automotive supply rail monitoring circuits with AC-coupled inputs |
| tRR | 4.0 ns - Supports >100 MHz digital signal edge rates in ESD clamp networks without distortion |
| CT | 2.0 pF @ 0 V - Minimizes capacitive loading on high-impedance sensor nodes and clock lines |
| RθJA | 625 °C/W - Requires minimal copper area (1 in², 2 oz) for thermal compliance in sealed enclosures |
| IF(AV) | 150 mA - Sustains continuous current in LED indicator drivers and level-shifter bias paths |
| VF | 0.715 V @ 1 mA - Ensures low forward drop in low-power wake-up detection circuits |
Pinout & Package
Package: SOD323 - ultra-compact 1.30 mm × 1.70 mm surface-mount plastic case with matte tin-plated alloy 42 leadframe, moisture sensitivity level 1, and cathode band polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; requires trace routing clearance per IPC-2221A |
| Cathode | Forward current exit / reverse blocking terminal | Marked by visible band; ties to reference plane or lower-voltage rail in clamping configurations |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, TCT, and ESD HBM ≥ 2 kV |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) |
| Low leakage at high temp | IRM ≤ 30 nA @ VR = 20 V, TJ = +150 °C - maintains signal integrity in under-hood sensor interfaces |
| Small outline footprint | SOD323 pad layout occupies 2.2 mm² PCB area - enables dense placement in ADAS camera module flex PCBs |
Applications
| Automotive Door Module | Industrial PLC Input Stage |
|---|---|
Use Scenario: Signal conditioning of LIN bus wake-up pulses in door control units exposed to 125 °C ambient. IC Role / Device Role / Timing Role: Fast clamping diode protecting microcontroller GPIO pins from transient overvoltage. Use Value: 4.0 ns tRR prevents pulse distortion during 20 kbps LIN frame transmission. | Use Scenario: Isolation and level shifting between 24 V field sensors and 3.3 V FPGA I/O banks. IC Role / Device Role / Timing Role: Bidirectional signal path protection element in optocoupler input circuitry. Use Value: 2.0 pF CT avoids timing skew in 100 kHz sampling control signals. |
| USB-C Port Protection | Medical Infusion Pump Controller |
Use Scenario: ESD suppression on CC line in portable medical USB-C chargers operating at –40 °C to +85 °C. IC Role / Device Role / Timing Role: Low-capacitance transient voltage suppressor in differential data line path. Use Value: 0.715 V VF @ 1 mA ensures minimal DC offset in precision voltage reference paths. | Use Scenario: Overvoltage protection for analog front-end ADC inputs monitoring motor current feedback. IC Role / Device Role / Timing Role: Reverse-biased blocking diode in fault-detection comparator bias network. Use Value: 75 V VRRM withstands induced transients from brushed DC pump motor commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F | Non-automotive grade; lacks AEC-Q101 qualification and PPAP capability | Restricted to commercial-grade consumer electronics; not approved for automotive production | Select when cost sensitivity outweighs automotive compliance requirements |
| BAT54C-7-F | Lower VRRM (30 V), Schottky architecture, 0.25 V typical VF, no AEC-Q101 rating | Used in low-voltage USB power path OR-ing; unsuitable for 12 V+ automotive signal rails | Choose only for sub-30 V systems where ultra-low forward drop is critical |
Compared with 1N4148W-7-F and BAT54C-7-F, the 1N4148WSQ-7-F uniquely combines automotive qualification, 75 V blocking, and 4.0 ns speed-making it the sole option for AEC-compliant high-speed clamping in 12 V/24 V vehicle networks.
Availability
1N4148WSQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controller input stages, and medical infusion pump safety circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N4148WSQ-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 1N4148WSQ series belongs to Diodes' automotive-qualified fast switching diode product line, engineered specifically for robust signal integrity in harsh-environment electronic control units where reliability and qualification compliance are mandatory.
FAQ
What is the maximum junction temperature for continuous operation?
The 1N4148WSQ-7-F supports continuous operation from –55 °C to +150 °C junction temperature. Derating begins at 25 °C ambient, with power dissipation linearly reduced to zero at +150 °C ambient per the published derating curve. Thermal design must account for RθJA = 625 °C/W on standard FR-4 board layout.
Is this diode suitable for bidirectional ESD protection?
No - the 1N4148WSQ-7-F is a unidirectional PN junction diode with cathode-band polarity marking. It provides effective clamping only when reverse-biased. For bidirectional ESD protection, purpose-built TVS diodes such as Diodes' D24Z3PQ-7-F (±24 V) are required.
How does the SOD323 package compare to SOD123 in layout density?
The SOD323 measures 1.30 mm × 1.70 mm (2.2 mm²), while SOD123 is 2.70 mm × 1.50 mm (4.05 mm²). SOD323 reduces PCB area by 46%, enabling tighter spacing in multi-channel sensor interfaces. Pad layout must follow Diodes' recommended dimensions (X = 0.59 mm, Y = 0.45 mm) to ensure solder joint reliability.
Does the "Q" suffix indicate a different die or just qualification status?
The "Q" suffix denotes full AEC-Q101 qualification, PPAP capability, and production in IATF 16949-certified facilities - not a different silicon die. Electrical parameters (VF, tRR, CT) match the non-Q 1N4148WS-7-F; the distinction lies solely in process control, test coverage, and documentation rigor required for automotive use.
1N4148WSQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
- Operating Temperature - Junction:
- -65°C ~ 150°C
1N4148WSQ-7-F FAQ
1.How can I place an order for 1N4148WSQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148WSQ-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 1N4148WSQ-7-F reliable?
The price and inventory of 1N4148WSQ-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 1N4148WSQ-7-F is usually 5 days.
3.What payment methods are accepted for 1N4148WSQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148WSQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148WSQ-7-F?
1N4148WSQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148WSQ-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 1N4148WSQ-7-F?
For technical support, including 1N4148WSQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148WSQ-7-F requirements.
6.How does Aetrix verify that 1N4148WSQ-7-F is sourced from the original manufacturer or authorized distributors?
All 1N4148WSQ-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 1N4148WSQ-7-F meets industry standards.
7.What is the process for return or replacement of 1N4148WSQ-7-F?
All 1N4148WSQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148WSQ-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 1N4148WSQ-7-F part is unused and in its original packaging.
Return procedure for 1N4148WSQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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