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

Diodes Incorporated 1N4148W-7

Name: 1N4148W-7
Brand: Diodes Incorporated
SKU: 1N4148W-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4148W-7

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: SOD-123

Datasheet:: 1N4148W-7.pdf

Description:: SMALL SIGNAL DIODE SOD123F 100V

Quantity:: RFQ Add To RFQ list

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Inventory:2,311

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Product details

Overview

1N4148W-7 from Diodes Incorporated is a surface-mount fast-switching silicon signal diode in SOD-123 package, rated for 100 V peak reverse voltage, 300 mA forward current, and 4 ns reverse recovery time. It delivers low forward voltage (0.715 V at 1 mA), low junction capacitance (2 pF), and operates across –55 °C to +150 °C - widely deployed in high-speed digital logic clamping and waveform shaping circuits.

For engineers reviewing the 1N4148W-7 datasheet, 1N4148W-7 pinout, 1N4148W-7 application, or 1N4148W-7 equivalent, key selection criteria include reverse recovery speed, forward voltage consistency at low currents, thermal derating behavior on FR-4 PCBs, and RoHS-compliant lead-free plating compatibility with automated SMT assembly.

Technical Context

This diode uses a planar epitaxial silicon structure optimized for rapid carrier recombination, enabling sub-4 ns reverse recovery under standardized 10 mA switching conditions (IF = IR = 10 mA, IRR = 0.1 × IR, RL = 100 Ω). Its low 2 pF capacitance at zero bias supports high-frequency signal routing without significant loading.

The SOD-123 package features matte tin-plated alloy 42 leads, J-STD-020 Level 1 moisture sensitivity, and UL 94V-0 molded green compound - designed for reliability in reflow-soldered consumer and industrial control boards where thermal cycling and long-term parametric stability are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Withstands repetitive reverse transients up to this voltage without breakdown in signal path protection.
t_RR	4 ns max - Enables reliable operation in >10 MHz digital switching and pulse shaping applications.
V_F @ 1 mA	0.715 V max - Minimizes voltage drop and power loss in low-current logic interface clamping.
C_T @ 0 V	2.0 pF max - Limits capacitive loading on high-speed data lines and clock distribution networks.
I_F	300 mA continuous - Supports sustained current in moderate-duty switching and level translation circuits.
R_θJA	315 °C/W - Requires careful thermal pad design on FR-4 to maintain junction temperature below 150 °C at full load.
P_D	400 mW - Power dissipation limit at 25 °C ambient; derates linearly above 25 °C per Figure 1.

Pinout & Package

Package: SOD-123 - Surface-mount plastic case with cathode band marking; dimensions: L = 1.00–1.35 mm, W = 2.55–2.85 mm, H = 3.55–3.85 mm; weight ≈ 0.01 g; moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node in clamping or rectification paths; requires thermal relief on PCB for solderability.
Cathode (marked by band)	Forward current exit / reverse blocking terminal	Serves as reference node for voltage limiting; polarity must be verified during automated placement to prevent functional failure.

Key Features

Feature	Design Value
Fast reverse recovery	4 ns maximum ensures minimal switching distortion in 10+ MHz clock and data line conditioning.
Low forward voltage	0.715 V at 1 mA enables precise TTL/CMOS input clamping without excessive DC offset.
Low junction capacitance	2 pF at 0 V allows integration into RF detector front-ends and high-speed sampling circuits.
Lead-free & halogen-free	Meets RoHS 3 and IEC 61249-2-21 standards; compatible with Pb-free reflow profiles and green manufacturing requirements.
Wide temperature range	–55 °C to +150 °C operation supports deployment in automotive engine control modules and industrial PLC I/O stages.

Applications

Logic-Level Clamping

Digital Signal Conditioning

Use Scenario: Protecting CMOS input pins from voltage overshoot during hot-plug or ESD events in microcontroller-based peripherals.

IC Role / Device Role: Fast-acting shunt clamp that conducts only when input exceeds V_CC + V_F, diverting transient energy to rail.

Use Value: Prevents latch-up and gate oxide damage using sub-4 ns turn-on response and low 0.715 V forward threshold.

Use Scenario: Sharpening slow-rising clock edges in FPGA configuration interfaces or serial bus receivers.

IC Role / Device Role: Edge accelerator via nonlinear conduction and low 2 pF capacitance to minimize signal delay skew.

Use Value: Reduces rise time jitter by limiting parasitic loading while maintaining clean transition integrity.

High-Frequency Demodulation

Power Supply Sequencing

Use Scenario: Envelope detection in 1–10 MHz IF stages of AM radio receivers and wireless sensor node front-ends.

IC Role / Device Role: Signal rectifier with minimal stored charge, preserving modulation fidelity under small-signal AC excitation.

Use Value: Delivers accurate demodulated output due to fast t_RR and low V_F variation across frequency.

Use Scenario: Isolating power rails during multi-voltage sequencing in embedded systems with separate 3.3 V, 1.8 V, and 1.2 V domains.

IC Role / Device Role: Reverse-biased isolation diode preventing backfeed between regulators during startup/shutdown transitions.

Use Value: Ensures strict sequencing compliance with 100 V V_RRM margin and stable leakage (<1 µA at 75 V).

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast-switching diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAV16W-7-F	Identical SOD-123 package, same 100 V V_RRM, but slightly higher typical V_F (0.75 V @ 1 mA) and 5 ns t_RR max.	Marginally slower recovery limits use in >8 MHz edge-shaping; otherwise interchangeable in clamping and isolation.	Select BAV16W-7-F only if legacy BOM alignment or dual-sourcing mandates identical footprint with relaxed timing tolerance.
1N4148WS-7-F	SOD-323 package (smaller footprint), same electrical specs, but lower power dissipation (300 mW) and higher R_θJA (400 °C/W).	Preferred for space-constrained portable designs; requires tighter thermal management on dense PCBs.	Choose 1N4148WS-7-F when board area is constrained and thermal performance can be validated per JEDEC JESD51-2.

Compared with BAV16W-7-F and 1N4148WS-7-F, the 1N4148W-7 offers optimal balance of speed (4 ns t_RR), thermal capability (400 mW P_D), and manufacturability (SOD-123 handling robustness), making it the default choice for general-purpose high-speed switching where reliability and process maturity are prioritized.

Availability

1N4148W-7 is available at Aetrix Electronics and suitable for logic-level clamping, digital signal conditioning, high-frequency demodulation, and power supply sequencing requiring stable component supply and consistent parametric performance across production lots.

Supply support for 1N4148W-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, manufacturing, and sales operations spanning Asia, Europe, and North America.

The 1N4148W series belongs to Diodes' general-purpose fast-switching diode product line, engineered specifically for high-reliability signal integrity applications in computing, communications, and industrial control systems where speed, consistency, and RoHS compliance are mandatory.

FAQ

What is the maximum reverse recovery time for the 1N4148W-7 under standard test conditions?

The maximum reverse recovery time (t_RR) is 4.0 ns, measured at I_F = I_R = 10 mA, I_RR = 0.1 × I_R, and R_L = 100 Ω. This value is guaranteed across the full operating temperature range and reflects worst-case performance under defined switching conditions.

Can the 1N4148W-7 be used in automotive applications?

The standard 1N4148W-7 is not AEC-Q101 qualified. For automotive use, Diodes specifies the 1N4148WQ-7-F variant, which is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities - the base 1N4148W-7 lacks required change control and qualification documentation.

How does the SOD-123 package affect thermal performance compared to through-hole 1N4148 variants?

The SOD-123 package has a junction-to-ambient thermal resistance (R_θJA) of 315 °C/W on standard FR-4 with 2" × 2" copper pads - significantly higher than through-hole TO-92 versions (~200 °C/W). This requires explicit thermal pad design and limits continuous power dissipation unless board-level copper area is increased.

Is the 1N4148W-7 compatible with lead-free reflow soldering processes?

Yes - the device uses matte tin finish over alloy 42 leadframe and is rated for lead-free reflow profiles per JEDEC J-STD-020. Its moisture sensitivity level is Class 1, eliminating bake requirements prior to assembly, and its green molding compound meets UL 94V-0 flammability rating.

1N4148W-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

Operating Temperature - Junction:: -65°C ~ 150°C

1N4148W-7 FAQ

1.How can I place an order for 1N4148W-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4148W-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 1N4148W-7 reliable?

The price and inventory of 1N4148W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4148W-7 is usually 5 days.

3.What payment methods are accepted for 1N4148W-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4148W-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4148W-7?

1N4148W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4148W-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 1N4148W-7?

For technical support, including 1N4148W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4148W-7 requirements.

6.How does Aetrix verify that 1N4148W-7 is sourced from the original manufacturer or authorized distributors?

All 1N4148W-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 1N4148W-7 meets industry standards.

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

All 1N4148W-7 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4148W-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 1N4148W-7 part is unused and in its original packaging.

Return procedure for 1N4148W-7:

1.Submit a request within 90 days.

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

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