• 7809 9V Voltage regulator-RS769 - REES52
  • 7809 9V Voltage regulator-RS769 - REES52
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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

RS769

1581 in stock

Rs. 13.00
Rs. 13.00
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  • Delivery time if the order item is on Preorder Status is 15-20 working days.

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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