1N4148 onsemi 1N4148 Standard Diode 100V 200mA DO-35

Reliable High-Speed Signal Diode for General-Purpose Through-Hole Designs

The onsemi 1N4148 is a widely used small-signal fast switching diode designed for dependable performance in a broad range of electronic circuits. Built in a DO-204AH (DO-35) through-hole package, this device combines compact axial-lead construction with proven electrical characteristics, making it a practical choice for OEM manufacturers, industrial equipment builders, repair applications, and component distributors serving high-volume production needs. The onsemi datasheet lists the 1N4148 in the DO-35 bulk, ammo, and tape-and-reel family options, supporting both prototyping and scalable assembly workflows.

Engineers and procurement teams often choose the 1N4148 because it offers a strong balance of switching speed, voltage capability, low capacitance, and easy integration into conventional PCB assemblies. With a maximum repetitive reverse voltage of 100 V and an average rectified forward current of 200 mA, the device is well suited for signal routing, pulse circuits, logic protection, waveform shaping, and other low-power general-purpose applications.

A key advantage of the onsemi 1N4148 is its fast switching behavior. The datasheet specifies a reverse recovery time of 4.0 ns under stated test conditions, which makes it effective in applications where quick transition from forward conduction to reverse blocking is important. This characteristic supports use in high-speed signal paths, digital circuits, and switching networks where slower rectifier diodes may introduce unnecessary delay or inefficiency.

In addition to switching speed, the 1N4148 delivers practical electrical performance for everyday design requirements. It features a forward voltage of 1.0 V max at 10 mA for the 1N4148 variant and a total capacitance of 4.0 pF at the specified test condition, helping designers manage signal integrity in compact circuit layouts. Low capacitance and stable response are especially beneficial in communication equipment, consumer electronics, control boards, test instruments, and embedded systems that require consistent small-signal behavior.

Designed for Manufacturing Efficiency and Long-Term Reliability

For B2B buyers, component selection is not only about electrical performance, but also about supply consistency, assembly compatibility, and application versatility. The onsemi 1N4148 addresses these requirements with a familiar axial through-hole format that remains popular in industrial, automotive-adjacent maintenance environments, education, service replacement, and mixed-technology PCB designs. Its DO-35 package supports easy manual insertion and wave-solder assembly, making it suitable for both legacy systems and new designs that continue to use through-hole components.

The diode also supports durable operation across demanding thermal conditions. According to the datasheet, it offers an operating junction temperature range from -55°C to +175°C and a storage temperature range from -65°C to +200°C. These ratings make it a solid option for equipment exposed to variable ambient environments, such as power control units, instrumentation modules, industrial interfaces, and field-service electronics.

Power handling is another practical benefit. The device is rated for 500 mW power dissipation, with 300 mA DC forward current and 400 mA recurrent peak forward current. This gives designers added flexibility when dealing with transient events, pulsed signals, and moderate current demands within compact signal-stage circuitry. For surge conditions, the datasheet also specifies 1.0 A non-repetitive peak forward surge current for a 1.0 s pulse width and 4.0 A for a 1.0 µs pulse width under the stated conditions.

Because the 1N4148 is one of the most recognized small-signal diodes in the electronics industry, it is frequently specified in BOMs where cross-project standardization matters. This makes it highly suitable for contract manufacturers, international sourcing teams, and distributors seeking a dependable part for recurring demand across multiple product categories. Choosing an established onsemi device can also support quality assurance processes by providing traceable datasheet-backed performance from a globally recognized semiconductor supplier. The currently referenced onsemi datasheet revision is dated September 2024, Rev. 6.

Typical Applications

The onsemi 1N4148 is suitable for a wide variety of low-power and signal-level circuit functions, including:

• High-speed switching circuits
• Signal demodulation and clipping
• Logic circuit protection
• Pulse shaping networks
• General-purpose signal isolation
• Instrumentation and test equipment
• Consumer and industrial control boards
• Repair, replacement, and maintenance assemblies

Its combination of fast recovery, compact axial packaging, and broad electrical utility makes it a preferred choice where engineers need a proven diode solution without unnecessary complexity. The part is especially valuable in designs that prioritize stable sourcing, straightforward installation, and predictable performance. These application-fit conclusions are based on the device’s published voltage, current, capacitance, package, and reverse recovery characteristics.

Key Features

Fast Switching Performance

With a reverse recovery time of 4.0 ns, the onsemi 1N4148 is designed for high-speed signal switching and fast-response circuit operation.

100 V / 200 mA Electrical Capability

The diode provides 100 V maximum repetitive reverse voltage and 200 mA average rectified forward current, supporting a wide range of small-signal and general-purpose designs.

Through-Hole DO-35 Package

Housed in a DO-204AH (DO-35) axial-lead package, the 1N4148 is easy to integrate into traditional PCB assemblies, prototyping environments, and maintenance applications.

Specifications

• Manufacturer: onsemi
• Part Number: 1N4148
• Product Type: Small Signal Diode / Standard Diode
• Package: DO-204AH (DO-35)
• Mounting Type: Through Hole
• Maximum Repetitive Reverse Voltage (VRRM): 100 V
• Average Rectified Forward Current (IO): 200 mA
• DC Forward Current (IF): 300 mA
• Recurrent Peak Forward Current: 400 mA
• Forward Voltage (VF): 1.0 V max @ 10 mA
• Reverse Leakage Current (IR): 0.025 µA @ 20 V; 5.0 µA @ 75 V
• Total Capacitance (CT): 4.0 pF @ VR = 0, f = 1.0 MHz
• Reverse Recovery Time (trr): 4.0 ns
• Power Dissipation (PD): 500 mW
• Operating Junction Temperature: -55°C to +175°C
• Storage Temperature Range: -65°C to +200°C

Why Choose the onsemi 1N4148?

For B2B customers, the onsemi 1N4148 represents a practical and scalable diode solution that combines industry-standard performance, dependable packaging, and broad application compatibility. Whether you are sourcing for original equipment manufacturing, replacement inventory, industrial service, or electronic distribution, this part offers the technical familiarity and supply-side usability needed in professional procurement environments. Backed by onsemi’s published specifications, the 1N4148 remains a trusted choice for fast switching and general-purpose signal handling in through-hole circuit designs.