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Diodes Incorporated 1N4148WQ-7-F
- Part No.:
- 1N4148WQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
1N4148WQ-7-F.pdf
- Description:
- DIODE GEN PURP 100V 300MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:28,526
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Product details
Overview
1N4148WQ-7-F from Diodes Incorporated is an AEC-Q101 qualified surface-mount fast switching diode in SOD-123 package, with 100 V peak reverse voltage, 4 ns reverse recovery time, and 0.715 V max forward voltage at 1 mA - used for high-speed signal clamping and logic-level translation in automotive infotainment power rails.
For engineers reviewing the 1N4148WQ-7-F datasheet, 1N4148WQ-7-F pinout, 1N4148WQ-7-F application, or 1N4148WQ-7-F equivalent, key selection criteria include reverse recovery speed, low forward voltage under light load, automotive qualification status, and SOD-123 thermal derating behavior on FR-4 PCBs.
Technical Context
This diode implements a planar epitaxial silicon 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 junction capacitance at 0 V supports >100 MHz signal integrity in digital interface protection circuits.
The device operates across –55 °C to +150 °C and delivers 400 mW power dissipation at 25 °C ambient, derating linearly to zero at 150 °C per Figure 1 - critical for under-hood automotive modules where ambient exceeds 105 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - supports 24 V automotive systems with ≥4× safety margin against load-dump transients |
| tRR | 4.0 ns max - enables reliable operation in 10–50 MHz clock line clamping and data line steering |
| VF @ 1 mA | 0.715 V max - minimizes voltage drop in low-current bias networks and level-shifting circuits |
| CT @ 0 V | 2.0 pF max - preserves signal edge fidelity in high-speed GPIO and UART lines |
| IFM | 300 mA continuous - sufficient for LED indicator drive and small-signal relay coil flyback suppression |
| TJ Range | –55 to +150 °C - certified for engine control unit (ECU), body control module (BCM), and ADAS sensor interfaces |
Pinout & Package
Package: SOD-123 - surface-mount plastic case with cathode band marking, 0.01 g mass, UL 94V-0 rated molding compound, and matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to higher-potential node during conduction; requires thermal pad design per Diodes' recommended footprint (X=0.9 mm, Y=0.95 mm) |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to reference or lower-potential rail; defines polarity-sensitive placement in ESD protection paths |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use with PPAP capability and IATF 16949 manufacturing - required for Tier-1 BOM inclusion |
| 4 ns reverse recovery | Enables clean switching in 25 MHz+ digital isolator input stages without ringing or false triggering |
| 2 pF junction capacitance | Reduces capacitive loading on 3.3 V/5 V microcontroller I/O pins, preserving rise/fall times below 2 ns |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Clamping transient spikes on 12 V CAN bus power rails during load dump events. IC Role / Device Role / Timing Role: Fast-switching clamp diode placed between VCC and ground to shunt energy before LDO overvoltage threshold is exceeded. Use Value: 4 ns tRR ensures clamping activation within first 10 ns of spike onset, limiting voltage overshoot to <15 V. | Use Scenario: Protecting 24 V DC digital input channels from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Reverse-biased protection element across optocoupler input terminals to absorb ±2 kV contact ESD per IEC 61000-4-2. Use Value: 2 pF CT avoids signal delay distortion on 10 kHz–1 MHz input polling cycles while maintaining <1 µA leakage at 24 V. |
| USB 2.0 Data Line ESD Clamp | Microcontroller Reset Circuit Debounce |
Use Scenario: Low-capacitance ESD protection on D+ and D– lines adjacent to USB PHY IC. IC Role / Device Role / Timing Role: Bidirectional clamping diode pair (anode-to-anode or cathode-to-cathode) referenced to VBUS and GND. Use Value: 2 pF CT prevents USB 480 Mbps eye diagram degradation; 0.715 V VF ensures minimal DC offset on bias networks. | Use Scenario: Debouncing mechanical switch inputs connected to MCU GPIO with pull-up and RC filter. IC Role / Device Role / Timing Role: Reverse-biased diode across RC network to discharge capacitor rapidly when switch opens. Use Value: 4 ns tRR enables <100 ns discharge time, reducing bounce duration to <200 ns - compatible with 10 µs MCU sampling intervals. |
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 | No AEC-Q101 qualification; identical electrical specs and SOD-123 package | Not approved for automotive production; suitable for industrial/commercial prototypes | Select when automotive change control and PPAP documentation are not required |
| BAS16W-7-F | Same package; 100 V VRRM but 6 ns tRR and 0.855 V VF @ 10 mA | Higher VF increases power loss in battery-powered IoT nodes; slower tRR limits >20 MHz use | Choose only if cost sensitivity outweighs speed and low-VF requirements |
Compared with 1N4148W-7-F, the Q-grade offers mandatory automotive traceability and qualification; versus BAS16W-7-F, it delivers 33% faster switching and 160 mV lower VF at 1 mA - decisive for low-power sensing and high-frequency signal routing.
Availability
1N4148WQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input protection, USB 2.0 ESD clamping, and microcontroller reset debounce circuits requiring stable component supply and full AEC-Q101 compliance.
Supply support for 1N4148WQ-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 centers across Asia and manufacturing in IATF 16949-certified facilities.
The 1N4148WQ series belongs to Diodes' automotive-qualified fast switching diode product line, engineered specifically for robust transient suppression and high-speed signal conditioning in harsh-temperature vehicle subsystems.
FAQ
Is 1N4148WQ-7-F pin-compatible with standard 1N4148 through-hole diodes?
No - 1N4148WQ-7-F uses the SOD-123 surface-mount package with anode/cathode terminals spaced 2.65 mm apart, whereas legacy 1N4148 uses DO-35 axial leads. PCB layout and reflow profile must be redesigned; no mechanical or solder footprint compatibility exists.
What is the maximum allowable junction temperature during transient surge conditions?
The absolute maximum junction temperature is +150 °C. Under non-repetitive 2.0 A IFSM surge (t = 1.0 µs), self-heating is negligible; however, sustained 300 mA IF at +125 °C ambient raises TJ to ~142 °C - staying within limit only if PCB copper area meets Diodes' 3 oz double-sided thermal pad spec.
Does the "Q" suffix guarantee full PPAP submission support?
Yes - the "Q" denotes Diodes' automotive-grade variant: it is manufactured in IATF 16949-certified facilities, supports full PPAP Level 3 documentation (including PSW, control plans, MSA, and dimensional reports), and includes change notification per customer-specific requirements per Diodes' Automotive Product Definitions.
How does moisture sensitivity level (MSL) affect handling prior to reflow?
Rated MSL-1 per J-STD-020, meaning unlimited floor life at ≤30 °C/60% RH. No dry-pack or baking is required before SMT assembly - simplifying logistics for high-mix automotive contract manufacturing environments.
1N4148WQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 300mA
- 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:
- 1 µA @ 100 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -55°C ~ 150°C
1N4148WQ-7-F FAQ
1.How can I place an order for 1N4148WQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4148WQ-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 1N4148WQ-7-F reliable?
The price and inventory of 1N4148WQ-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 1N4148WQ-7-F is usually 5 days.
3.What payment methods are accepted for 1N4148WQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148WQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4148WQ-7-F?
1N4148WQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4148WQ-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 1N4148WQ-7-F?
For technical support, including 1N4148WQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148WQ-7-F requirements.
6.How does Aetrix verify that 1N4148WQ-7-F is sourced from the original manufacturer or authorized distributors?
All 1N4148WQ-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 1N4148WQ-7-F meets industry standards.
7.What is the process for return or replacement of 1N4148WQ-7-F?
All 1N4148WQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148WQ-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 1N4148WQ-7-F part is unused and in its original packaging.
Return procedure for 1N4148WQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4148WQ-7-F Tags
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1N4448X-TP
Micro Commercial Co
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1N4148WX-TP
Micro Commercial Co
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1N4148TR
onsemi
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MMSD4148T1G
onsemi
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MMBD914LT3G
onsemi
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BAS16HT1G
onsemi
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1N914BWT
onsemi
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BAS21LT1G
onsemi
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LL4148
onsemi
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BAS16LT1G
onsemi
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MMSD914T1G
onsemi
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BAV21W-7-F
Diodes Incorporated
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