315 MHz Helical Antenna 3dBi Spring Antenna

315 MHz Helical Antenna 3dBi Spring Antenna Specification

Rated Temperature
-40°C to +85°C

Impedance
50 Ohms

Core Material
Copper

Weight
<2g

Core Number
1

Conductor Shape
Helical (Spring)

Conductor Type
Single Core

Usage & Applications
Wireless communication, ISM band devices

Features
High gain, compact size, lightweight, easy installation, good frequency stability, omnidirectional radiation, suitable for wireless modules

Diameter
7 mm

Number of Conductor
1

Operating Temperature
-40°C to +85°C

Armored Material
Not Armored

Install Type
PCB Mountable

Insulation
PVC Coated at Legs (if provided)

Product Type
Helical Spring Antenna

Length
31 mm

Voltage
3V to 5V typical

Insulation Material
PVC

Application
Remote control, wireless data transmission, car burglar alarm, security systems, wireless sensor network

Conductor Material
Copper

Jacket Material
None (Spring Type Antenna)

Storage Temperature
-40°C to +85°C

Connector Color
Gold

Shield Material
None (Open Coil Design)

Jacket Color
Natural/Metallic

Dimension (L*W*H)
31 mm x 7 mm x 7 mm

Material
Copper

Color
Gold

Size
31 mm Length, 7 mm Diameter

Signal Direction
Omnidirectional

Gain
3 dBi

Frequency Range
315 MHz (center frequency)

Polarization
Vertical

Surface Finish
Tinned/Copper

Operating Humidity
Max 95% RH (non-condensing)

Base Type
ABS Plastic

RoHS Compliance
Yes

Model Number
SA315-42-7

Lead-Free
Yes

VSWR
2.0

Packaging Type
Bulk

Max Power Input
10W

Mounting Method
Direct PCB mount/solder

315 MHz Helical Antenna 3dBi Spring Antenna Trade Information

Minimum Order Quantity
5 Pieces

Main Domestic Market
All India

About 315 MHz Helical Antenna 3dBi Spring Antenna

Description:315/433MHz Antenna,Male,Straight,Standard,forCable,3dBi,WiFi/WLAN

315/433MHz Antenna,Male,Straight,Standard,for Cable,3dBi,WiFi/WLAN
Used to transmit and receive electromagnetic wave in Wireless deverice with stable signal and low loss;
Applied to wireless communication, radio, TV, radar, remote control fields;
Multi mode and specification for choice;
From the OEM Original Factory, same quality with much better price.

Overview of the SA315-42-7 Antenna

The SA315-42-7 is a helical, spring-type antenna built for 315 MHz applications. With its omnidirectional pattern and 3 dBi gain, it excels in wireless modules requiring stable, compact antennas. Its copper construction, gold finish, and direct PCB mount design meet modern industry standards, making it a preferred choice across wireless and security systems.

Installation Made Simple

This antenna mounts directly onto PCBs via soldering, ensuring straightforward integration into your wireless module designs. It is lightweight (<2g), has no external jacket, and its tinned copper finish promotes robust, long-lasting solder joints. The process is well-suited for bulk manufacturing and prototyping alike.

Engineered for Demanding Environments

Designed to withstand wide temperature and humidity ranges (operating from -40C to +85C, up to 95% non-condensing RH), the SA315-42-7 maintains stable operation across harsh industrial and outdoor conditions. Such ruggedness guarantees dependable performance for security systems, automotive applications, and wireless networks.

FAQs of 315 MHz Helical Antenna 3dBi Spring Antenna:

Q: How do I mount the 315 MHz Helical Antenna SA315-42-7 to my PCB?

A: The antenna is designed for direct PCB mounting. Simply solder the spring legs onto the specified PCB pads, ensuring good mechanical and electrical contact. The tinned finish facilitates easy soldering, streamlining the integration process during assembly.

Q: What are the main usage scenarios for this helical antenna?

A: This antenna is commonly used in remote controls, wireless data transmission modules, car burglar alarms, security systems, and wireless sensor networks. Its omnidirectional design and high frequency stability make it ideal for ISM band devices requiring consistent signal quality.

Q: When should I consider using the SA315-42-7 model for my wireless project?

A: Choose this antenna when working with 315 MHz wireless modules that demand compact size, ease of installation, and omnidirectional coverage. Its robust build and wide operating temperature make it suitable for both indoor and outdoor, security, and industrial applications.

Q: Where can I use this antenna in terms of environmental conditions?

A: The SA315-42-7 operates reliably across a temperature range from -40C to +85C, and tolerates up to 95% relative humidity (non-condensing), making it suitable for harsh industrial, automotive, and outdoor environments.

Q: What benefits does this antenna offer over other designs?

A: Key advantages include its compact size (31 mm x 7 mm), high 3 dBi gain, omnidirectional radiation pattern, and stable frequency response. Additionally, the direct PCB mount design supports stress-free installation, while compliance with RoHS and lead-free standards ensures safety and environmental friendliness.

Q: How does the open coil design impact the antennas performance?

A: The open coil (spring) helical design delivers effective omnidirectional coverage and good frequency stability. It eliminates the need for external shielding or jackets, resulting in a lighter, more efficient antenna suitable for compact wireless devices.