Screw Terminals

A screw terminal is an electrical connector made from plated brass that enables wires to be connected directly to a PCB and consists of a metal frame and a screw. The screw terminal is secured to the PCB using mounting legs which are snapped into holes on the PCB and soldered into place. Pre-stripped wire is wrapped under the head of the screw and the screw is tightened down using a screwdriver making a secure electrical connection between the wire and the metal frame. Wires that are terminated with connectors such as spade or ring terminals are pushed into place over the screw. Screw terminals are available with a right angle or vertical mounting body orientation, different body platings and to suit a wide range of current ratings
Some screw terminals feature colour coded screws for ease of identification and to aid trouble shooting.


Benefits of Screw Terminals


• Simple to use and easy to snap into place. Only basic hand tools required
• Allow high density wire connections to PCB
• Low cost, eliminate the need for a mating connector
• When properly tightened provide an electrically secure connection
• Can be reused in the field allowing for the replacement of wires or equipment
• Can be used with solid, stranded and pre-terminated wire
• Kinked leg versions for extra retention on the PCB


Where are screw terminals used?


PCB screw terminals allow electrical signals and current to flow to and from PCBs and electrical equipment.


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Description Price Orientation Wire Size Current Rating Minimum Wire Size AWG Snap-In Maximum Wire Size AWG Number of Legs Body Material Body Plating Colour Maximum Wire Size Minimum Wire Size
RS Stock No. 481-3917
Mfr. Part No.8190-3
BrandKeystone
TWD18.70
Each (In a Pack of 10)
units
Right Angle 22 → 14 AWG 15A - - - 4 Brass Nickel Black 14AWG 22AWG
RS Stock No. 614-2425
Mfr. Part No.7689
BrandKeystone
TWD15.20
Each (In a Bag of 10)
units
Right Angle 22 → 14 AWG 15A - Yes - 4 Brass Tin Natural 14AWG 22AWG
RS Stock No. 122-4982
Mfr. Part No.7461111
TWD216.00
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 122-4983
Mfr. Part No.7461112
TWD216.00
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 177-0036
Mfr. Part No.74651174R
TWD107.00
Each
units
Vertical - 50A - - - 4 Brass Tin - - -
RS Stock No. 717-6595
Mfr. Part No.5055557-4
TWD167.00
Each
units
Straight - 25A - - - - Nylon - - - -
RS Stock No. 122-5140
Mfr. Part No.7466004R
TWD84.00
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 122-4992
Mfr. Part No.7461098
TWD132.00
Each
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 176-9977
Mfr. Part No.7466105R
TWD114.00
Each
units
Vertical - 70A - - - - Brass Tin - - -
RS Stock No. 122-5145
Mfr. Part No.7466113R
TWD86.00
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 178-8750
BrandRS PRO
TWD0.90
Each (In a Bag of 100)
units
Straight 1 x 20 AWG, 1 x 22 → 2 x 16 AWG - 1 x 20 AWG, 1 x 22AWG - 2 x 16AWG - Thermoplastic - Grey - -
RS Stock No. 163-1843
Mfr. Part No.7460305
TWD65.80
Each (In a Box of 250)
units
Vertical - 160A - - - 8 - Tin - - -
RS Stock No. 162-1753
Mfr. Part No.7461059
TWD189.20
Each (In a Box of 100)
units
Straight - 240A - - - - Brass Tin - - -
RS Stock No. 163-1859
Mfr. Part No.7461090
TWD266.20
Each (In a Box of 75)
units
Vertical - 340A - - - 20 - Tin - - -
RS Stock No. 122-4979
Mfr. Part No.7461067
TWD400.00
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 122-4953
Mfr. Part No.7460553
TWD168.00
Each
units
Vertical - 240A - - - 10 - Tin - - -
RS Stock No. 162-1769
Mfr. Part No.7461129
TWD56.20
Each (In a Box of 250)
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 163-1873
Mfr. Part No.7461107
TWD440.80
Each (In a Box of 75)
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 163-1866
Mfr. Part No.7461099
TWD119.40
Each (In a Box of 100)
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 122-5144
Mfr. Part No.7466204R
TWD84.00
Each
units
Vertical - 50A - - - - - Tin - - -