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. 178-8754
BrandRS PRO
SGD0.128
Each (In a Bag of 50)
units
Straight 1 x 14 AWG, 1 x 18 AWG, 1 x 18 → 4 x 14 AWG - 1 x 14 AWG, 1 x 18AWG - 1 x 18 AWG, 4 x 14AWG - Thermoplastic - Yellow - -
RS Stock No. 178-8750
BrandRS PRO
SGD0.033
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. 178-8752
BrandRS PRO
SGD0.049
Each (In a Bag of 100)
units
Straight 3 x 20 → 3 x 16 AWG - 3 x 20AWG - 3 x 16AWG - Thermoplastic - Blue - -
RS Stock No. 178-8753
BrandRS PRO
SGD0.058
Each (In a Bag of 50)
units
Straight 1 x 18 AWG, 3 x 20 → 3 x 16 AWG - 3 x 20AWG - 1 x 18 AWG, 3 x 16AWG - Thermoplastic - Orange - -
RS Stock No. 917-5324
Mfr. Part No.225679
BrandERNI
SGD13.02
Each (In a Pack of 5)
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 122-4983
Mfr. Part No.7461112
SGD10.12
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 717-6595
Mfr. Part No.5055557-4
SGD8.30
Each
units
Straight - 25A - - - - Nylon - - - -
RS Stock No. 122-4975
Mfr. Part No.7461106
SGD18.80
Each
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 177-0007
Mfr. Part No.74655095R
SGD7.43
Each
units
Vertical - 85A - - - 8 Brass Tin - - -
RS Stock No. 205-3246
Mfr. Part No.74651194R
SGD6.18
Each (On a Tape of 5)
units
Straight - 85 - - - 9 Brass - - - -
RS Stock No. 162-1769
Mfr. Part No.7461129
SGD2.578
Each (In a Box of 250)
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 481-3973
Mfr. Part No.8191-2
BrandKeystone
SGD0.926
Each (In a Pack of 10)
units
Straight 22 → 14 AWG 15A - - - 4 Brass Nickel Red 14AWG 22AWG
RS Stock No. 163-1854
Mfr. Part No.7461067
SGD10.17
Each (In a Box of 250)
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 122-4994
Mfr. Part No.7461383
SGD4.14
Each
units
Vertical - 180A - - - 16 - Tin - - -
RS Stock No. 122-5146
Mfr. Part No.7466114R
SGD3.98
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 165-1020
Mfr. Part No.9-55556-0
SGD6.594
Each (In a Box of 500)
units
Straight - 25A - - - - Nylon - - - -
RS Stock No. 122-5144
Mfr. Part No.7466204R
SGD4.13
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 481-3945
Mfr. Part No.8190-5
BrandKeystone
SGD1.155
Each (In a Pack of 10)
units
Right Angle 22 → 14 AWG 15A - - - 4 Brass Nickel Blue 14AWG 22AWG
RS Stock No. 917-5314
Mfr. Part No.225675
BrandERNI
SGD6.44
Each (In a Pack of 5)
units
Vertical - 90A - - - 9 - Tin - - -
RS Stock No. 163-1843
Mfr. Part No.7460305
SGD2.849
Each (In a Box of 250)
units
Vertical - 160A - - - 8 - Tin - - -