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. 122-4981
Mfr. Part No.7461110
TWD228.00
Each
units
Right Angle - 130A - - - 9 - Tin - - -
RS Stock No. 717-6621
Mfr. Part No.216907-1
TWD104.00
Each
units
Straight - 20A - - - - - - - - -
RS Stock No. 122-5139
Mfr. Part No.7466003R
TWD84.00
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 122-4982
Mfr. Part No.7461111
TWD216.00
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 122-4975
Mfr. Part No.7461106
TWD402.00
Each
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 122-4983
Mfr. Part No.7461112
TWD216.00
Each
units
Right Angle - 180A - - - 16 - Tin - - -
RS Stock No. 122-4991
Mfr. Part No.7461096
TWD108.00
Each
units
Vertical - 130A - - - 9 - Tin - - -
RS Stock No. 122-4978
Mfr. Part No.7461066
TWD216.00
Each
units
Right Angle - 130A - - - 9 - Tin - - -
RS Stock No. 122-5140
Mfr. Part No.7466004R
TWD84.00
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 142-4046
Mfr. Part No.74650094R
TWD143.00
Each
units
Vertical - 85A - - - 8 Brass Tin - - -
RS Stock No. 917-5336
Mfr. Part No.225681
BrandERNI
TWD389.60
Each (In a Pack of 5)
units
Vertical - 90A - - - 9 - 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. 162-1769
Mfr. Part No.7461129
TWD56.20
Each (In a Box of 250)
units
Straight - - - - - - Brass 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. 122-4974
Mfr. Part No.7461104
TWD348.00
Each
units
Right Angle - 160A - - - 8 - Tin - - -
RS Stock No. 122-4976
Mfr. Part No.7461107
TWD534.00
Each
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 917-5327
Mfr. Part No.225677
BrandERNI
TWD168.60
Each (In a Pack of 5)
units
Vertical - 160A - - - 16 - Tin - - -
RS Stock No. 163-1881
Mfr. Part No.7461117
TWD513.50
Each (In a Box of 50)
units
Right Angle - 340A - - - 36 - Tin - - -