HC-SR04

Ultrasonic Distance Sensor Module

The HC-SR04 is a ultrasonic distance sensor module from Multicomp. View the full HC-SR04 datasheet below including key specifications, pinout.

Official HC-SR04 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Multicomp

HC-SR04 Key Specifications

Parameter	Value
Contents	Board(s)
Function	Ultrasonic
Type	Sensor
Utilized IC / Part	HC-SR04

HC-SR04 Overview

Part: HC-SR04 Ultrasonic Sensor Module V2.0 — Handson Technology

Type: Ultrasonic Distance Sensor Module

Description: A low-cost ultrasonic sensor module operating from 3.3V to 5V DC, providing distance measurements from 2 cm to 400 cm with ±3mm accuracy, using a 40 KHz ultrasonic pulse.

Operating Conditions:

Supply voltage: 3.3Vdc ~ 5Vdc
Operating frequency: 40 KHz
Operating range: 2 cm ~ 400 cm

Absolute Maximum Ratings:

Max junction/storage temperature: null

Key Specs:

Quiescent Current: <2mA
Operating Current: 15mA
Operating Range: 2cm ~ 400cm
Accuracy: ±3mm
Sensitivity: -65dB min
Sound Pressure: 112dB
Effective Angle: 15°

Features:

Wider input voltage range (3.3Vdc ~ 5Vdc) compared to first generation
Measures distance using sonar (40KHz ultrasonic pulse)
On-board 2.54mm pitch pin header for easy prototyping
Requires a 10uS TTL pulse to 'Trigger Input' pin to start ranging
Provides TTL Logic Output on 'Echo' pin proportional to distance

Applications:

Object avoidance in robotics projects
Turret applications
Water level sensing
Car parking reverse sensors
Liquid level detection

Package:

4-pins header with 2.54mm pitch (45mm x 20mm x 15mm)

HC-SR04 Pin Configuration

HC-SR04 Ultrasonic Sensor Module – 4-Pin Header Pinout

Pin Number	Pin Name	Type	Description
1	VCC	Power	Supply voltage: 3.3V ~ 5V DC
2	TRIG	Input	Trigger input pin. Requires 10µS TTL pulse to initiate measurement
3	ECHO	Output	Echo output pin. TTL logic output proportional to distance
4	GND	Ground	Ground reference

Notes

Pin Header: 4-pin 2.54mm pitch connector
Operating Voltage: 3.3V to 5V DC (second-generation module supports wider voltage range than first-generation HC-SR04)
Measurement Cycle: Use ≥60ms measurement cycle to prevent trigger signal interference with echo signal
Distance Calculation: Distance (cm) = Echo pulse duration (µS) / 58, or Distance (inches) = Echo pulse duration (µS) / 148
Operating Frequency: 40 kHz ultrasonic burst
Measurement Range: 2 cm to 400 cm (±3mm accuracy)

HC-SR04 Ordering Information

MPN	Package	Temperature Range	Packing
MDU-1014	Module with 4-pin header	null	null

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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