Important NoteThis entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!
Generic Signal Diodes - SMT Packages
Details
- Location: Cabinet-6, Bin 1, Container D & E
- Category: Discrete Semiconductors
- Brand: Generic/Mixed (Multiple manufacturers)
- Part Number: Generic Signal Diodes (SMT)
- Package: SOD-323, SOD-123 (Surface Mount)
- Quantity: 20+ units per container
- Status: Available
- Price Range: $0.02-0.10 per unit
- Datasheet: MMSD4148 Example Datasheet
- Product URL: DigiKey - Signal Diodes
Description
Generic high-speed signal diodes in compact surface-mount packages (SOD-323 and SOD-123). These diodes are commonly used for signal processing, logic circuits, switching applications, and general-purpose rectification. Typical variants include 1N4148W, BAT54, MMSD4148, and similar devices from multiple manufacturers.
Specifications
Electrical Characteristics (Typical)
- Reverse Breakdown Voltage (VR): 75V-100V (typical)
- Forward Current (IF): 200mA-500mA (typical)
- Forward Voltage Drop (VF): 0.7V-1.0V (typical at rated current)
- Reverse Leakage Current (IR): <100nA (typical)
- Switching Time: <4ns (typical for high-speed variants)
- Operating Temperature: -55°C to +150°C
- Junction Temperature: 150°C (maximum)
Mechanical Characteristics
- Package: SOD-323 or SOD-123 (Surface Mount)
- Pin Count: 2 pins
- Mounting: Surface Mount
- RoHS Compliant: Yes
Pin Configuration
Standard 2-pin diode:
Pin 1: Cathode (K) - marked with band
Pin 2: Anode (A)
Applications
- Signal processing circuits
- Logic circuits and gates
- High-speed switching applications
- General-purpose rectification
- Clamp diodes
- Protection circuits
- Microcontroller I/O protection
- RF and microwave circuits
Key Features
- High-Speed Switching: Fast recovery time (<4ns typical)
- Low Capacitance: Suitable for high-frequency applications
- Compact Package: SOD-323/SOD-123 saves PCB space
- Wide Availability: Multiple manufacturers ensure supply
- General-Purpose Design: Versatile for many applications
- Low Cost: Economical for high-volume applications
Circuit Integration
Basic Rectification Circuit
Connect for signal rectification:
- Anode to signal source
- Cathode to load or ground
- Provides one-way current flow
Clamp Diode Application
Protect circuits from voltage spikes:
- Cathode to positive supply
- Anode to signal line
- Provides protection against negative transients
Logic Circuit Protection
Protect microcontroller I/O:
- Cathode to positive supply
- Anode to I/O pin
- Prevents overvoltage damage
Technical Notes
- Polarity is critical: cathode marked with band on package
- High-speed switching suitable for logic circuits
- Low capacitance minimizes signal distortion
- Suitable for both DC and AC applications
- Multiple manufacturers produce compatible devices
- Generic stock may contain mixed variants from different manufacturers
- All variants are functionally equivalent for general-purpose applications
Common Variants
- 1N4148W: Classic high-speed switching diode
- BAT54: Schottky diode with lower forward voltage
- MMSD4148: ON Semiconductor high-speed switching diode
- 1N4007: General-purpose rectifier diode
Tags
diode, signal-diode, smt, sod-323, sod-123, switching, generic, cabinet-6, bin-1, status-available
Notes
Generic collection of high-speed signal diodes in surface-mount packages. These are essential components for signal processing, logic circuits, and protection applications. Stock of 20+ units per container provides excellent supply for multiple projects. Note that generic stock may contain mixed variants from different manufacturers, but all are functionally equivalent for general-purpose signal diode applications.