Wiring & Schematic Diagram Symbols and Meanings
Browse 482 electrical and electronic symbols with meanings, IEC vs ANSI standards, and example circuits. Use any symbol free in the online editor.
Print the full symbols chart or save it as a free PDF.
Diy symbols
- 240V Outlet symbol
- AFCI Breaker symbol
- AFCI/GFCI Combo Breaker symbol
- Alarm Panel symbol
- Armored Cable (MC/BX) symbol
- Attic Fan symbol
- Baseboard Heater symbol
- Bathroom Exhaust Fan symbol
- Battery Bank symbol
- CCTV Camera symbol
- Ceiling Fan symbol
- Ceiling Fan with Light symbol
- Circuit Breaker symbol
- CO Detector symbol
- Conduit Run symbol
- Dimmer Switch symbol
- Disconnect symbol
- Doorbell / Chime symbol
- Doorbell Button symbol
- Doorbell Camera symbol
- Double-Pole Breaker symbol
- Dual Run Capacitor symbol
- Duplex Outlet symbol
- Electric Cooker / Range symbol
- Emergency Light symbol
- EV Charger Outlet (NEMA 14-50) symbol
- Exit Sign symbol
- Fence Energizer symbol
- Fluorescent Fixture symbol
- Garage Door Opener symbol
- Garbage Disposal symbol
- Gate Motor symbol
- Generator symbol
- GFCI Breaker symbol
- GFCI Outlet symbol
- Ground symbol
- Hot Tub Disconnect symbol
- Junction Box symbol
- Landscape Light (Low Voltage) symbol
- LED Driver symbol
- LED Strip symbol
- Light Fixture symbol
- Low Voltage Transformer symbol
- Main Panel symbol
- Meter Base symbol
- Motion Sensor symbol
- Occupancy Sensor symbol
- Outdoor Lamp Post symbol
- Outlet symbol
- Path Light symbol
- Photocell / Dusk Sensor symbol
- Pool Pump symbol
- Prepaid Meter symbol
- Pull Box symbol
- Range / Dryer Outlet symbol
- Range Hood symbol
- Recessed Can Light (6-inch) symbol
- Recessed Light symbol
- Romex Cable symbol
- Service Entrance symbol
- Smart Switch (WiFi) symbol
- Smoke Detector symbol
- Solar Charge Controller symbol
- Solar Inverter symbol
- Solar Panel symbol
- Subpanel symbol
- Switch (3-Way) symbol
- Switch (SPST) symbol
- Tandem / Twin Breaker symbol
- Thermostat symbol
- Timer Switch symbol
- Track Light symbol
- Track Lighting Head symbol
- Transfer Switch symbol
- Under-Cabinet Light symbol
- USB Outlet symbol
- Weatherproof Box symbol
- Weatherproof Outlet symbol
- Whole House Surge Protector symbol
- Whole-House Fan symbol
- Wire Nut symbol
- Wire Raceway / Molding symbol
- Wire Splice symbol
- Zone Valve symbol
Industrial symbols
- 3-Phase Motor symbol
- 3-Phase Plug (CEE / Industrial) symbol
- 3-Phase Supply symbol
- 3-Pole Contactor symbol
- 3.5mm Audio Jack (TRS) symbol
- 4-Pole Contactor symbol
- Alternator symbol
- Ammeter symbol
- Automotive Relay (5-pin) symbol
- Autotransformer symbol
- Battery Charger symbol
- BLDC / Brushless DC Motor symbol
- Bus Tie Switch symbol
- Buzzer / Audible Alarm symbol
- Cable Entry / Gland symbol
- Cable Lug / Crimp Terminal symbol
- Cable Tray symbol
- Capacitor Bank symbol
- Changeover Contact (SPDT) symbol
- Check Valve symbol
- Circuit Breaker (MCB) symbol
- Compressor symbol
- Contactor Coil symbol
- Contactor NC Contact symbol
- Contactor NO Contact symbol
- Current Limiting Reactor symbol
- Current Transformer (CT) symbol
- DIN Rail symbol
- DIN Rail End Stop symbol
- Disconnect Switch / Isolator symbol
- Distributed I/O Module symbol
- Door Interlock Switch symbol
- Earth Leakage Relay symbol
- Emergency Stop symbol
- Energy Meter (kWh) symbol
- Fire Alarm Panel symbol
- Float Switch symbol
- Flow Control Valve symbol
- Flow Switch symbol
- Fluorescent / HID Ballast symbol
- Foot Switch symbol
- Fuse symbol
- Fuse Terminal Block symbol
- Ground / Earth symbol
- Grounding Switch symbol
- Guitar Output Jack (TS) symbol
- Guitar Pickup symbol
- Harmonic Filter symbol
- Heating Cable / Heat Trace symbol
- Heating Element symbol
- HMI Touchscreen Panel symbol
- Horn / Siren symbol
- Hydraulic Cylinder symbol
- Hydraulic Motor symbol
- Hydraulic Pump symbol
- Hydraulic Reservoir symbol
- Ignition Coil symbol
- Ignition Switch (Multi-Position) symbol
- Industrial Network Switch symbol
- Inverter (DC-AC) symbol
- Isolation Transformer symbol
- Key Switch symbol
- Knife Disconnect Switch symbol
- Lightning Arrester symbol
- Lightning Rod / Air Terminal symbol
- Limit Switch NC symbol
- Limit Switch NO symbol
- Line Reactor symbol
- Magneto (Engine Generator) symbol
- Manual Pull Station symbol
- MCCB (Molded Case CB) symbol
- Motor Protection CB symbol
- Motor Protection Relay symbol
- Motor Starter (DOL) symbol
- Multi-Level Terminal Block symbol
- NEMA L14-30 (4-prong twist-lock) symbol
- Neutral Rail symbol
- OBD-II Connector (16-pin) symbol
- Overload Contact NC symbol
- Overload Contact NO symbol
- Panel Fan symbol
- Panel Thermostat symbol
- Phase Sequence Relay symbol
- Photoelectric Sensor symbol
- Pilot Light / Indicator symbol
- PLC CPU symbol
- PLC Input Module symbol
- PLC Output Module symbol
- Plug Connector Female symbol
- Plug Connector Male symbol
- Pneumatic 3/2 Valve symbol
- Pneumatic 5/2 Valve symbol
- Pneumatic Cylinder (Double Acting) symbol
- Pneumatic Cylinder (Single Acting) symbol
- Power Distribution Block symbol
- Power Factor Controller symbol
- Power Meter symbol
- Power Rail symbol
- Power Supply 24V DC symbol
- Pressure Regulator symbol
- Pressure Switch symbol
- PROFINET Connector symbol
- Proximity Sensor (Capacitive) symbol
- Proximity Sensor (Inductive) symbol
- Pump (Motor-driven) symbol
- Push Button NC symbol
- Push Button NO symbol
- RCA / Phono Connector symbol
- RCD / RCCB symbol
- Relay Coil symbol
- Relay NC Contact symbol
- Relay NO Contact symbol
- Relief Valve symbol
- Reversing Valve symbol
- RJ45 / Ethernet Connector symbol
- RTD Temperature Sensor symbol
- Safety Interlock Switch symbol
- Safety Light Curtain symbol
- Safety PLC symbol
- Safety Relay Module symbol
- Selector Switch 2-Position symbol
- Selector Switch 3-Position symbol
- Single-Phase Motor symbol
- Soft Starter symbol
- Soft Starter (3-Phase) symbol
- Solenoid Valve symbol
- Spark Plug symbol
- Split-Core CT symbol
- Stack Light symbol
- Star-Delta Starter symbol
- Starter Motor symbol
- Stepper Motor (4-wire bipolar) symbol
- Surge Arrester (SPD) symbol
- Surge Protector symbol
- Switch (4-Way) symbol
- Switch (DPST — 4-pin Rocker) symbol
- Temperature Switch symbol
- Terminal Block symbol
- Thermal Overload Relay symbol
- Thermocouple symbol
- Time Delay Relay (Off-Delay) symbol
- Time Delay Relay (On-Delay) symbol
- Trailer Connector (4-pin Flat) symbol
- Trailer Connector (7-pin) symbol
- TV Antenna (Yagi) symbol
- Undervoltage Relay symbol
- UPS Block symbol
- Variable Transformer (Variac) symbol
- VFD / Variable Frequency Drive symbol
- Voltage Transformer (PT) symbol
- Voltmeter symbol
- Water Heater / Geyser symbol
- Water Level Probe (3 electrodes) symbol
- Wire Crossing (No Connection) symbol
- Wire Duct / Trunking symbol
- Wire Junction / Node symbol
- Wire Label / Marker symbol
- X-Ray Tube symbol
- XLR Connector (3-pin Audio) symbol
- XNX / 4-20mA Gas Transmitter symbol
Pro symbols
- 4-Bit Counter symbol
- 7-Segment Decoder symbol
- ADC Block symbol
- Amplifier Block symbol
- AND Gate symbol
- Antenna symbol
- Astable Multivibrator symbol
- Balun symbol
- Bandpass Filter Block symbol
- Bandstop Filter Block symbol
- BCD Counter symbol
- Boost Converter (Topology) symbol
- Buck Converter (Topology) symbol
- Buffer symbol
- CCCS (Dependent Current Source) symbol
- CCVS (Dependent Voltage Source) symbol
- Center-Tap Transformer symbol
- Charge Pump symbol
- Clamper Circuit symbol
- Colpitts Oscillator symbol
- Comparator symbol
- Crystal Oscillator Module symbol
- Current Mirror symbol
- Current Source symbol
- D Flip-Flop symbol
- DAC Block symbol
- Darlington Pair symbol
- Decoder (3:8) symbol
- Demultiplexer (DEMUX) symbol
- DIAC symbol
- Differential Amplifier symbol
- Differentiator symbol
- Digital Comparator symbol
- Directional Coupler symbol
- Emitter Follower symbol
- Encoder (Priority) symbol
- Envelope Detector symbol
- Flyback Converter symbol
- FPGA Block symbol
- Frequency Divider symbol
- FSK Modulator symbol
- Full-Wave Rectifier symbol
- Gate Driver symbol
- Gilbert Cell Mixer symbol
- Ground (Chassis) symbol
- Ground (Signal) symbol
- H-Bridge symbol
- Half-Wave Rectifier symbol
- Highpass Filter Block symbol
- IGBT symbol
- Instrumentation Amplifier symbol
- Integrator symbol
- JK Flip-Flop symbol
- Linear Regulator Block symbol
- Log Amplifier symbol
- Low Noise Amplifier symbol
- Lowpass Filter Block symbol
- Monostable Multivibrator symbol
- Multiplexer (MUX) symbol
- Multiplexer 4:1 symbol
- N-Channel JFET symbol
- NAND Gate symbol
- Noise Source symbol
- NOR Gate symbol
- NOT Gate / Inverter symbol
- NPN Transistor symbol
- Op-Amp symbol
- Optocoupler symbol
- OR Gate symbol
- P-Channel JFET symbol
- Peak Detector symbol
- Phase Detector symbol
- Pi Attenuator symbol
- PLL Block symbol
- Power Amplifier Block symbol
- Precision Rectifier symbol
- Precision Voltage Reference symbol
- PTAT Current Source symbol
- RAM Block symbol
- RF Attenuator symbol
- RF Log Detector symbol
- RF Mixer symbol
- Sample and Hold symbol
- SAR ADC symbol
- Schmitt Trigger symbol
- Schmitt Trigger NAND symbol
- Sigma-Delta ADC symbol
- Signal Generator symbol
- Signal Limiter symbol
- Snubber Network symbol
- Squelch Circuit symbol
- SR Latch symbol
- Summing Amplifier symbol
- T Attenuator symbol
- T Flip-Flop symbol
- Test Point symbol
- Thyristor / SCR symbol
- Transformer symbol
- Transimpedance Amplifier symbol
- Tri-State Buffer symbol
- TRIAC symbol
- Varactor Diode symbol
- VCCS (Dependent Current Source) symbol
- VCO Block symbol
- VCVS (Dependent Voltage Source) symbol
- VGA DAC Block symbol
- Voltage Divider symbol
- Voltage Doubler symbol
- Voltage Source (AC) symbol
- Voltage Source (DC) symbol
- Wheatstone Bridge symbol
- Wien Bridge Oscillator symbol
- XNOR Gate symbol
- XOR Gate symbol
- Zero-Crossing Detector symbol
Hobbyist symbols
- 4x4 Matrix Keypad symbol
- 555 Timer IC symbol
- 74HC595 Shift Register symbol
- 8-Channel Relay Board symbol
- 8x8 LED Matrix symbol
- A4988 Stepper Driver symbol
- ACS712 Current Sensor Module symbol
- ADS1115 ADC Module symbol
- Arduino Uno symbol
- ATmega328 (DIP) symbol
- Battery symbol
- Bluetooth Module (HC-05) symbol
- BMP280 Pressure Sensor symbol
- Boost Converter Module symbol
- Breadboard Power Rail symbol
- Buck Converter Module symbol
- CAN Bus Transceiver symbol
- Capacitive Touch Sensor symbol
- Capacitor symbol
- CD4051 Analog MUX symbol
- Cell (Single) symbol
- Crystal Oscillator symbol
- Current Sensor (ACS712) symbol
- DC Barrel Jack symbol
- DC Motor symbol
- DHT11 Temperature/Humidity symbol
- Diode symbol
- DIP Switch symbol
- DPDT Switch symbol
- DS18B20 Temperature Sensor symbol
- Electric Bell symbol
- Electrolytic Capacitor symbol
- ESP32 symbol
- ESP8266 Module symbol
- Ferrite Bead symbol
- Fingerprint Sensor symbol
- Fuse symbol
- Galvanometer symbol
- H-Bridge IC (L298N) symbol
- Hall Effect Sensor symbol
- HC-SR501 PIR Module symbol
- Header Pins (Female) symbol
- Header Pins (Male) symbol
- Inductor / Coil symbol
- IR Receiver symbol
- IR Remote Control symbol
- IR Transmitter LED symbol
- Joystick Module symbol
- JST Connector (2-pin) symbol
- JST Connector (4-pin) symbol
- Lamp / Light Bulb symbol
- LCD 16x2 Module symbol
- LED symbol
- LiPo Battery symbol
- LiPo Charger Module (TP4056) symbol
- LM2596 Power Module symbol
- LM317 (Adjustable Regulator) symbol
- LM7805 (5V Regulator) symbol
- Load Cell (HX711) symbol
- Logic Level Shifter symbol
- LoRa Module symbol
- MAX7219 LED Driver symbol
- MCP23017 GPIO Expander symbol
- Microphone symbol
- Motor Driver Module symbol
- MPU6050 IMU Module symbol
- MQ-2 Gas Sensor symbol
- N-Channel MOSFET symbol
- Neon Lamp symbol
- NeoPixel LED Ring symbol
- NPN Transistor (BJT) symbol
- nRF24L01 RF Module symbol
- OLED Display Module symbol
- Op-Amp (DIP) symbol
- Optocoupler Module symbol
- P-Channel MOSFET symbol
- Photodiode symbol
- Photoresistor (LDR) symbol
- Phototransistor symbol
- Piezo Buzzer symbol
- PIR Motion Sensor symbol
- PN532 NFC Module symbol
- PNP Transistor (BJT) symbol
- Portable Power Bank symbol
- Potentiometer symbol
- Push Button symbol
- Raspberry Pi symbol
- Reed Switch symbol
- Relay Module symbol
- Relay SPDT symbol
- Resistor symbol
- RFID RC522 Module symbol
- RGB LED (4-pin) symbol
- Rotary Encoder symbol
- Rotary Encoder Module symbol
- Rotary Switch symbol
- RTC DS3231 Module symbol
- Schottky Diode symbol
- Screw Terminal (2-pos) symbol
- Screw Terminal (3-pos) symbol
- SD Card Module symbol
- Servo Motor symbol
- Seven-Segment Display symbol
- Shift Register (8-bit) symbol
- Slide Switch symbol
- Solar Cell (Small) symbol
- Solenoid Coil symbol
- Speaker symbol
- Stepper Motor symbol
- Supercapacitor symbol
- TCS3200 Color Sensor symbol
- TFT LCD Display symbol
- Thermistor (NTC) symbol
- Trimpot / Trimmer symbol
- Ultrasonic Sensor symbol
- USB Connector symbol
- Variable Resistor symbol
- Varistor (MOV) symbol
- Voltage Divider Module symbol
- Voltage Regulator symbol
- Wemos D1 Mini symbol
- WS2812 Addressable LED symbol
- Zener Diode symbol
Which circuit diagram symbols do I need for GCSE physics?
GCSE physics uses the IEC-style symbols for cell, battery, switch, lamp, resistor, variable resistor, thermistor, LDR, diode, LED, ammeter, voltmeter, and fuse. All of them are in the DIY and hobbyist packs above — click any symbol for its meaning and a worked example circuit.
What circuit symbols are taught in grade 6 to grade 8 science?
Middle-school circuits use a small set: cell/battery, wire, open and closed switch, bulb (lamp), resistor, and sometimes a buzzer or motor. Start with the DIY pack — each symbol page explains what the symbol means and how to draw it correctly.
What is the difference between IEC and ANSI circuit symbols?
IEC 60617 symbols (used in Europe, the UK, and most schools) draw resistors as rectangles; ANSI/IEEE 315 symbols (common in the US) use the zigzag form. Each symbol page here shows both standard forms side by side so you can read either style of diagram.
Can I download these electrical symbols as a PDF chart?
Yes — open the printable symbols chart and use your browser's print dialog to print it or save it as a free PDF. Every symbol on the chart links back to its full reference page.