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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Vishay 1N4148W-HG3_A-18

Name: 1N4148W-HG3_A-18
Brand: Vishay
SKU: 1N4148W-HG3_A-18
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4148W-HG3_A-18

Manufacturer:: Vishay

Category:: Single Diodes

Package:: -

Datasheet:: 1N4148W-HG3_A-18.pdf

Description:: SWITCHING DIODE GENPURP SOD123

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Product details

Overview

1N4148W-HG3_A-18 from Vishay Semiconductors is a silicon epitaxial planar fast-switching diode in SOD-123 package, rated for 100 V repetitive peak reverse voltage (V_RRM), 300 mA continuous forward current (I_F), and 4 ns reverse recovery time (t_rr). It is AEC-Q101 qualified and used in high-speed clamping, signal routing, and logic-level protection circuits in automotive control modules.

For engineers reviewing the 1N4148W-HG3_A-18 datasheet, 1N4148W-HG3_A-18 pinout, 1N4148W-HG3_A-18 application, or 1N4148W-HG3_A-18 equivalent, key selection criteria include its MSL 1 moisture sensitivity rating, UL 94 V-0 molding compound, 1.5 pF junction capacitance at 0 V, and guaranteed t_rr ≤ 4 ns under standardized IF = 10 mA / iR = 1 mA test conditions.

Technical Context

This diode employs a planar epitaxial construction enabling fast carrier recombination and low stored charge, directly supporting its 4 ns reverse recovery performance. Its thermal resistance junction-to-ambient (R_thJA) is 440 K/W on FR-4 with recommended footprint, and maximum junction temperature is rated at 150 °C.

The device operates across -55 °C to +150 °C ambient range and features low leakage: ≤25 nA at V_R = 20 V and ≤100 μA at V_R = 100 V. Forward voltage is specified as 1.0 V at I_F = 10 mA and 1.2 V at I_F = 100 mA, confirming stable conduction behavior in digital interface and transient suppression roles.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - supports reliable blocking in 48 V automotive and 24 V industrial bus applications
t_rr	4 ns - enables use in >100 MHz switching nodes and high-frequency logic clamping
C_D	1.5 pF at 0 V - minimizes capacitive loading on high-speed signal lines
I_F(AV)	250 mA - sufficient for sustained current in level-shifting and sample-and-hold protection
R_thJA	440 K/W - defines thermal derating curve on standard FR-4 PCBs without heatsink
MSL Level	Level 1 - allows unlimited floor life and standard reflow without baking
V_F @ 10 mA	1.0 V - ensures predictable voltage drop in low-current bias and sensing paths

Pinout & Package

SOD-123 surface-mount package: 2.7 mm × 1.55 mm × 1.175 mm body, cathode marked by bar, weight ≈10.6 mg, UL 94 V-0 compliant molding compound.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side in clamping; must be routed with low-inductance path for fast switching
Cathode	Forward current exit / reverse-blocking terminal	Marked by bar; ties to reference rail or signal return; critical for polarity-sensitive ESD protection

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive powertrain and body electronics per stress test requirements
Fast switching (t_rr ≤ 4 ns)	Enables clean edge transitions in clock distribution and pulse shaping networks
Low leakage (≤25 nA @ 20 V)	Maintains signal integrity in high-impedance analog sampling and sensor biasing
MSL 1 rating	Eliminates pre-reflow baking and supports just-in-time SMT assembly
UL 94 V-0 molding	Meets flammability safety requirements for enclosed automotive and industrial enclosures

Applications

Automotive Signal Clamping	Industrial Digital Interface Protection
Use Scenario: Suppressing inductive kickback and ESD transients on LIN bus and sensor input lines in engine control units. IC Role / Device Role / Timing Role: Fast clamping diode placed between signal line and ground/V_CC, conducting only during overvoltage events. Use Value: 4 ns t_rr prevents latch-up in downstream MCU GPIOs; AEC-Q101 status ensures field reliability.	Use Scenario: Protecting RS-485 transceiver inputs against ±15 kV HBM ESD and cable-induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (1.5 pF) shunt element that diverts transient energy without distorting data edges. Use Value: Sub-1 V forward voltage at 10 mA ensures minimal impact on common-mode range; MSL 1 simplifies manufacturing.
High-Speed Logic-Level Translation	Sample-and-Hold Circuit Protection
Use Scenario: Isolating voltage domains between 3.3 V microcontrollers and 5 V peripherals using passive level-shift topologies. IC Role / Device Role / Timing Role: Bidirectional signal path component enabling safe voltage translation via series diode configuration. Use Value: 1.0 V V_F at 10 mA provides predictable offset; 1.5 pF C_D avoids timing skew in >20 MHz data streams.	Use Scenario: Preventing op-amp output overload during multiplexer channel switching in precision data acquisition systems. IC Role / Device Role / Timing Role: Back-to-back clamping pair limiting hold capacitor voltage excursion beyond supply rails. Use Value: ≤25 nA leakage at 20 V preserves capacitor charge for >100 ms hold times; 150 °C T_j rating supports extended thermal environments.

Automotive Signal Clamping

Industrial Digital Interface Protection

Use Scenario: Suppressing inductive kickback and ESD transients on LIN bus and sensor input lines in engine control units.

IC Role / Device Role / Timing Role: Fast clamping diode placed between signal line and ground/V_CC, conducting only during overvoltage events.

Use Value: 4 ns t_rr prevents latch-up in downstream MCU GPIOs; AEC-Q101 status ensures field reliability.

Use Scenario: Protecting RS-485 transceiver inputs against ±15 kV HBM ESD and cable-induced surges in factory automation PLCs.

IC Role / Device Role / Timing Role: Low-capacitance (1.5 pF) shunt element that diverts transient energy without distorting data edges.

Use Value: Sub-1 V forward voltage at 10 mA ensures minimal impact on common-mode range; MSL 1 simplifies manufacturing.

High-Speed Logic-Level Translation

Sample-and-Hold Circuit Protection

Use Scenario: Isolating voltage domains between 3.3 V microcontrollers and 5 V peripherals using passive level-shift topologies.

IC Role / Device Role / Timing Role: Bidirectional signal path component enabling safe voltage translation via series diode configuration.

Use Value: 1.0 V V_F at 10 mA provides predictable offset; 1.5 pF C_D avoids timing skew in >20 MHz data streams.

Use Scenario: Preventing op-amp output overload during multiplexer channel switching in precision data acquisition systems.

IC Role / Device Role / Timing Role: Back-to-back clamping pair limiting hold capacitor voltage excursion beyond supply rails.

Use Value: ≤25 nA leakage at 20 V preserves capacitor charge for >100 ms hold times; 150 °C T_j rating supports extended thermal environments.

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-G3-18	No AEC-Q101 qualification; otherwise identical electrical specs and SOD-123 package	Restricted to commercial-grade industrial and consumer applications	Select when automotive qualification is not required and cost optimization is prioritized
BAT54CW-7-F	Higher V_F (0.33 V @ 10 mA), lower V_RRM (30 V), dual-common-cathode Schottky structure	Better for low-voltage, low-loss clamping below 3.3 V; unsuitable for 48 V+ systems	Choose for ultra-low forward drop in battery-powered IoT sensors where reverse voltage < 30 V

Compared with 1N4148W-G3-18 and BAT54CW-7-F, the 1N4148W-HG3_A-18 uniquely combines AEC-Q101 compliance, 100 V blocking, and 4 ns switching-making it the only option qualified for safety-critical automotive signal conditioning without design revalidation.

Availability

1N4148W-HG3_A-18 is available at Aetrix Electronics and suitable for automotive control modules, industrial communication interfaces, and precision analog front-ends requiring stable component supply and long-term lifecycle assurance.

Supply support for 1N4148W-HG3_A-18 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

Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.

The 1N4148W family was engineered specifically for high-speed signal integrity applications demanding consistent t_rr, low leakage, and robust packaging-targeting automotive infotainment, ADAS sensor interfaces, and industrial PLC I/O modules.

FAQ

What is the AEC-Q101 qualification status of the 1N4148W-HG3_A-18?

The 1N4148W-HG3_A-18 is fully AEC-Q101 qualified, meaning it has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing per automotive reliability standards. This qualification is explicitly confirmed in the Vishay datasheet revision 1.1 and applies specifically to the "HG3_A" variant-not the base "G3" version. The 1N4148W-HG3_A-18 is therefore approved for use in automotive powertrain and chassis systems.

Does the 1N4148W-HG3_A-18 have the same electrical specifications as the non-AEC-Q101 1N4148W-G3-18?

Yes-the 1N4148W-HG3_A-18 shares identical absolute maximum ratings, thermal characteristics, and electrical parameters (including V_F, I_R, t_rr, and C_D) with the 1N4148W-G3-18. The only functional difference is the AEC-Q101 qualification; no electrical or mechanical specification is relaxed or enhanced in the HG3_A variant. Both use the same SOD-123 package and marking "AH".

What is the maximum allowable soldering temperature for the 1N4148W-HG3_A-18?

The 1N4148W-HG3_A-18 supports lead-free reflow per J-STD-020 with a peak temperature of 260 °C for up to 30 seconds. Its MSL 1 rating means it may be exposed to ambient conditions indefinitely without baking prior to soldering. The device's UL 94 V-0 molding compound remains stable under these conditions, and thermal resistance values assume proper FR-4 footprint per Vishay document S8-V-3910.01-003.

Can the 1N4148W-HG3_A-18 replace older 1N4148 variants in existing designs?

Yes-the 1N4148W-HG3_A-18 is a direct form-fit-function replacement for legacy 1N4148 and 1N4148W versions in SOD-123, provided the design requires AEC-Q101 qualification. Its pinout, dimensions, and electrical behavior match exactly; however, designers must verify that the higher 100 V V_RRM and tighter t_rr tolerance do not interact unexpectedly with existing snubber or clamping network values. The 1N4148W-HG3_A-18 itself remains backward compatible.

What does the "HG3_A" suffix indicate in the 1N4148W-HG3_A-18 part number?

The "HG3_A" suffix identifies this as the AEC-Q101 qualified green (halogen-free) version in 13″ reel packaging (code "18"). "H" denotes AEC-Q101 qualification, "G3" indicates green/commercial grade material set, "A" specifies tape-and-reel orientation per SOD-123 carrier tape spec, and "-18" means 10,000 units per 13″ reel. This full suffix distinguishes it from non-automotive variants like 1N4148W-G3-08 or 1N4148W-G3-18.

1N4148W-HG3_A-18 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: -

Voltage - DC Reverse (Vr) (Max):: -

Current - Average Rectified (Io):: -

Voltage - Forward (Vf) (Max) @ If:: -

Speed:: -

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: -

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

Operating Temperature - Junction:: -

1N4148W-HG3_A-18 FAQ

1.How can I place an order for 1N4148W-HG3_A-18 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4148W-HG3_A-18 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 1N4148W-HG3_A-18 reliable?

The price and inventory of 1N4148W-HG3_A-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148W-HG3_A-18 is usually 5 days.

3.What payment methods are accepted for 1N4148W-HG3_A-18?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148W-HG3_A-18 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4148W-HG3_A-18?

1N4148W-HG3_A-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4148W-HG3_A-18 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 1N4148W-HG3_A-18?

For technical support, including 1N4148W-HG3_A-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148W-HG3_A-18 requirements.

6.How does Aetrix verify that 1N4148W-HG3_A-18 is sourced from the original manufacturer or authorized distributors?

All 1N4148W-HG3_A-18 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 1N4148W-HG3_A-18 meets industry standards.

7.What is the process for return or replacement of 1N4148W-HG3_A-18?

All 1N4148W-HG3_A-18 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148W-HG3_A-18, 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 1N4148W-HG3_A-18 part is unused and in its original packaging.

Return procedure for 1N4148W-HG3_A-18:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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