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. 178-8753
BrandRS PRO
SGD0.064
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. 178-8752
BrandRS PRO
SGD0.039
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. 178-8754
BrandRS PRO
SGD0.10
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
SGD0.037
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. 847-8710
Mfr. Part No.PCSB4-3-12Y
BrandPanduit
SGD47.27
Each
units
Straight 14 → 10 AWG, 14 → 4 AWG - - Yes - 3 Aluminium - Natural 10 AWG, 4AWG 14AWG
RS Stock No. 717-6595
Mfr. Part No.5055557-4
SGD6.72
Each
units
Straight - 25A - - - - Nylon - - - -
RS Stock No. 122-4983
Mfr. Part No.7461112
SGD8.91
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 917-5324
Mfr. Part No.225679
BrandERNI
SGD11.044
Each (In a Pack of 5)
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 122-4981
Mfr. Part No.7461110
SGD10.13
Each
units
Right Angle - 130A - - - 9 - Tin - - -
RS Stock No. 162-2136
Mfr. Part No.7461123
SGD4.67
Each
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 163-1851
Mfr. Part No.7461063
SGD5.116
Each (In a Box of 250)
units
Right Angle - 160A - - - 8 - Tin - - -
RS Stock No. 122-4989
Mfr. Part No.7461001
SGD3.77
Each
units
Vertical - 130A - - - 9 - Tin - - -
RS Stock No. 122-4970
Mfr. Part No.7461064
SGD15.45
Each
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 163-1867
Mfr. Part No.7461100
SGD10.241
Each (In a Box of 80)
units
Vertical - 340A - - - 36 - Tin - - -
RS Stock No. 162-2259
Mfr. Part No.7462095
SGD10.54
Each
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 122-4986
Mfr. Part No.7461115
SGD23.34
Each
units
Right Angle - 250A - - - 25 - Tin - - -
RS Stock No. 122-4982
Mfr. Part No.7461111
SGD9.77
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 162-2095
Mfr. Part No.7462096
SGD6.49
Each
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 142-4097
Mfr. Part No.7466313R
SGD5.13
Each
units
Right Angle - 50A - - - 2 Brass Tin - - -
RS Stock No. 122-4955
Mfr. Part No.7461058
SGD18.84
Each
units
Vertical - 320A - - - 12 - Tin - - -