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7809 9V 1A Voltage Regulator IC – Fixed 9V Linear Regulator | TO-220 Package | LM7809, KA7809, MC7809 Compatible | For Arduino, Audio Amplifiers, and DIY Electronics Projects India
7809 9V 1A Voltage Regulator IC – Fixed 9V Linear Regulator | TO-220 Package | LM7809, KA7809, MC7809 Compatible | For Arduino, Audio Amplifiers, and DIY Electronics Projects India
SKU:RS769
350 in stock
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Rs. 13.00
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Description :
The 7809 Voltage Regulator IC is a 3-terminal linear voltage regulator that provides a fixed 9V DC output from higher DC input voltages (typically 11V–35V). This IC can supply up to 1A of continuous current and is designed with built-in protection features for overload, short-circuit, and thermal shutdown — ensuring safe and reliable performance in a wide range of electronic, Arduino, and DIY applications.
🧠 Universal Compatibility:
This IC is pin-to-pin compatible with multiple manufacturer variants:
- L7812CV (STMicroelectronics)
- KA7812 (ON Semiconductor / Fairchild)
- MC7812 (Motorola / ON Semiconductor)
- LM7812 (Texas Instruments)
All share identical electrical specifications and pin configurations.
Specifications:
| Parameter | Specification | Notes |
| Output Voltage | +9V DC ±4% | Fixed output |
| Output Current | 1A max | With adequate heatsinking |
| Input Voltage Range | 11V to 35V DC | For proper regulation |
| Dropout Voltage | 2V typical | Input must exceed output by ≥2V |
| Line Regulation | 3mV typical | Consistent output vs input |
| Load Regulation | 12mV typical | Consistent output vs load |
| Ripple Rejection | 60–70dB | Excellent noise filtering |
| Operating Temp | 0°C to +125°C | Junction temperature |
| Package | TO-220 | 3-pin through-hole |
| Pins | Input, Ground, Output | Standard configuration |
Features:
- ✅ Fixed +9V DC Output (±4%)
- ✅ Up to 1A Output Current
- ✅ Wide Input Range: 11V–35V DC
- ✅ TO-220 Package (easy to mount, heatsink compatible)
- ✅ Short-Circuit & Thermal Protection Built-In
- ✅ Low Ripple & Noise (perfect for analog & audio circuits)
- ✅ Stable Performance Under Varying Load Conditions
- ✅ 100% Compatible With: LM7809, KA7809, MC7809, UA7809
Pin Configuration:
| Pin Number | Name | Function |
| 1 | Input (VIN) | Unregulated DC input (11V–35V) |
| 2 | Ground (GND) | Common ground |
| 3 | Output (VOUT) | Regulated +9V DC output |
| TAB | Ground | Connected internally to GND |
🧩 Recommended Circuit:
Basic Connections:
- Input Capacitor: 0.33µF (Ceramic or Electrolytic) between Input & GND
- Output Capacitor: 0.1µF–1µF (Ceramic or Electrolytic) between Output & GND
- Heatsink required for loads >500mA
Protection Diodes (Optional):
- Input-Output Protection: 1N4007 (prevents reverse current)
- Output-Ground Protection: 1N4007 (protects from reverse discharge)
🔋 Typical Applications:
- 🔹 Arduino & Microcontroller Boards:
Provide a regulated 9V source from a 12V or 15V adapter for consistent logic operation. - 🔹 Audio Amplifiers:
Stable and noise-free power for preamp and op-amp stages. - 🔹 Robotics & Automation Projects:
Power small DC motors, servo drivers, and logic circuits. - 🔹 Sensor & Analog Modules:
Ensures stable reference voltage for sensors and analog ICs. - 🔹 Battery Chargers:
Used in 9V DC charging circuits and battery regulators. - 🔹 Educational & DIY Electronics Kits:
Commonly used in engineering labs and Atal Tinkering Labs (ATL).
🧱 Build Quality & Protections:
| Protection | Description |
| Thermal Shutdown | Shuts down IC at ~150°C to prevent damage |
| Short-Circuit Protection | Limits current safely when output is shorted |
| Overload Protection | Maintains safe current limits |
| Reverse Polarity Protection | (With external diode) prevents accidental reverse connection |
Package Included:
- 1 x 7809 9V Voltage regulator