Screw Terminals

What is a Screw Terminal?


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. 385-499
Mfr. Part No.SCRTM4RA
MYR4.28
Each
units
- - - - - - 4 - - Natural - -
RS Stock No. 122-4966
Mfr. Part No.7461099
MYR21.68
Each
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 165-1020
Mfr. Part No.9-55556-0
MYR15.884
Each (In a Box of 500)
units
Straight - 25A - - - - Nylon - - - -
RS Stock No. 163-1846
Mfr. Part No.7460719
MYR19.257
Each (In a Box of 100)
units
Vertical - 250A - - - 25 - Tin - - -
RS Stock No. 122-4981
Mfr. Part No.7461110
MYR26.62
Each
units
Right Angle - 130A - - - 9 - Tin - - -
New
RS Stock No. 203-2512
Mfr. Part No.3RK1902-4BA00-5AA0
BrandSiemens
MYR66.87
Each
units
Straight 20 → 30 AWG 4A 30AWG Yes 20AWG 5 Polyamide - - - -
RS Stock No. 142-4064
Mfr. Part No.74650173R
MYR17.30
Each
units
Vertical - 50A - - - 4 Brass Tin - - -
RS Stock No. 142-4083
Mfr. Part No.7466310R
MYR14.50
Each
units
Right Angle - 50A - - - 2 Brass Tin - - -
RS Stock No. 163-1880
Mfr. Part No.7461115
MYR53.29
Each (In a Box of 75)
units
Right Angle - 250A - - - 25 - Tin - - -
RS Stock No. 162-2097
Mfr. Part No.7461121
MYR33.49
Each
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 177-0036
Mfr. Part No.74651174R
MYR12.88
Each
units
Vertical - 50A - - - 4 Brass Tin - - -
RS Stock No. 122-5143
Mfr. Part No.7466203R
MYR9.82
Each
units
Vertical - 50A - - - - - Tin - - -
RS Stock No. 122-4955
Mfr. Part No.7461058
MYR53.05
Each
units
Vertical - 320A - - - 12 - Tin - - -
RS Stock No. 122-4970
Mfr. Part No.7461064
MYR41.92
Each
units
Right Angle - 240A - - - 10 - Tin - - -
RS Stock No. 163-1856
Mfr. Part No.7461084
MYR12.15
Each (In a Box of 150)
units
Vertical - 160A - - - 8 - Tin - - -
RS Stock No. 162-2108
Mfr. Part No.7460211
MYR29.72
Each
units
Straight - - - - - - Brass Tin - - -
RS Stock No. 122-4956
Mfr. Part No.7461084
MYR15.91
Each
units
Vertical - 160A - - - 8 - Tin - - -
RS Stock No. 141-8501
Mfr. Part No.7466313R
MYR8.712
Each (On a Reel of 1000)
units
Right Angle - 50A - - - 2 Brass Tin - - -
RS Stock No. 409-1909
Mfr. Part No.8189
BrandKeystone
MYR7.215
Each (In a Bag of 10)
units
45 deg - 15A - - - 4 Brass Nickel Natural - -
RS Stock No. 122-4974
Mfr. Part No.7461104
MYR41.92
Each
units
Right Angle - 160A - - - 8 - Tin - - -
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Models and technical descriptions identical to codes 8190 ...
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