Ring Terminals

A ring terminal is a short metal tube with flat washer type ring attached. The tube or barrel end of the crimp is a hollow tube where the stranded wire is inserted and crimped. The contact or connection end is a flat ring with a central hole which connects to a stud or bolt. Ring terminals are insulated or non-insulated.


What does it do?


An electrical crimp is a solderless electrical connection. Ring terminals are used to connect wiring to screws and studs.


Where are they used?



  • Electrical panels 

  • Terminal blocks

  • Wiring harnesses


Types of Ring Terminal


Crimp terminals are available in a wide variety of ring sizes and wire sizes. The CSA (cross sectional area) or AWG (American wire gauge) of the stranded wire is the most critical. The size of the stranded wire must be adequately matched to meet the amperage. The size of the ring is matched to the bolt or stud size, usually in a metric measurement.


Insulated Terminals


DIN 46237 colour coding is the most popular type of crimp terminal. Colour coding is used to denote a wire size:



  • Red 0.5 mm² to 1.5 mm

  • Yellow 2.5 mm² to 6 mm

  • Blue 1.5 mm² to 2.5 mm


Other colours are available.


Non-insulated


Non-insulated terminals are bigger terminals. Non-insulated terminals connect to bigger studs and bolts. Non-insulated ring terminals have the capacity to except larger stranded wire. More specialised tooling is required for these heavy-duty terminals.


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Description Price Series Series Number Insulation Insulation Material Inner Ring Diameter Outer Ring Diameter Maximum Wire Size mm² Minimum Wire Size mm² Maximum Wire Size AWG Minimum Wire Size AWG Stud Size Colour Contact Material Contact Plating
RS Stock No. 200-7011
Mfr. Part No.C100SB2-8
£0.20
Each (In a Box of 100)
Units
S C100 Insulated Polycarbonate 8mm 12.5mm - - - - 8mm Blue - -
RS Stock No. 200-7013
Mfr. Part No.ICAU120
£4.86
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 120mm² - - - 10,5mm - - -
RS Stock No. 200-6964
Mfr. Part No.C50-6-5C
£0.381
Each (In a Box of 50)
Units
C - Uninsulated - - - 6mm² - - - 5mm - - -
RS Stock No. 200-6910
Mfr. Part No.C2-185-12CT
£5.885
Each (In a Box of 2)
Units
C - Uninsulated - - - 185mm² - - - 12mm - - -
RS Stock No. 200-7015
Mfr. Part No.C6-70-8CT
£1.748
Each (In a Box of 6)
Units
C - Uninsulated - - - 70mm² - - - 8mm - - -
RS Stock No. 200-7016
Mfr. Part No.C15-25-5CT
£0.885
Each (In a Box of 15)
Units
C - Uninsulated - - - 25mm² - - - 5mm - - -
RS Stock No. 200-6880
Mfr. Part No.C5-95-8CT
£2.35
Each (In a Box of 5)
Units
C - Uninsulated - - - 95mm² - - - 8mm - - -
RS Stock No. 200-7018
Mfr. Part No.C15-35-8CT
£0.882
Each (In a Box of 15)
Units
C - Uninsulated - - - 35mm² - - - 8mm - - -
RS Stock No. 200-6931
Mfr. Part No.C100SB1-5
£0.309
Each (In a Box of 100)
Units
S C100 Insulated Polycarbonate 5mm 8.6mm - - - - 5mm Blue - -
RS Stock No. 200-6918
Mfr. Part No.ICAU185
£5.683
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 185mm² - - - 12,8mm - - -
RS Stock No. 200-6972
Mfr. Part No.ICAU95
£4.087
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 95mm² - - - 10,5mm - - -
RS Stock No. 200-6889
Mfr. Part No.C6-50-10CT
£1.202
Each (In a Box of 6)
Units
C - Uninsulated - - - 50mm² - - - 10mm - - -
RS Stock No. 200-6986
Mfr. Part No.ICAU35
£3.94
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 35mm² - - - 8,4mm - - -
RS Stock No. 200-6913
Mfr. Part No.C0AU25
£5.177
Each (In a Bag of 3)
Units
C-AU - Uninsulated - - - 25mm² - - - 10,5mm - - -
RS Stock No. 200-6932
Mfr. Part No.C2-185-16CT
£6.885
Each (In a Box of 2)
Units
C - Uninsulated - - - 185mm² - - - 16mm - - -
RS Stock No. 200-6919
Mfr. Part No.ICAU240
£5.683
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 240mm² - - - 12,8mm - - -
RS Stock No. 200-6973
Mfr. Part No.C15-10-4CT
£0.446
Each (In a Box of 15)
Units
C - Uninsulated - - - 10mm² - - - 4mm - - -
RS Stock No. 200-6989
Mfr. Part No.C100NC2-8
£0.19
Each (In a Box of 100)
Units
N C100N Insulated Polyamide 8mm 13.8mm - - - - 8mm Yellow - -
RS Stock No. 200-6962
Mfr. Part No.C6-70-12CT
£1.748
Each (In a Box of 6)
Units
C - Uninsulated - - - 70mm² - - - 12mm - - -
RS Stock No. 200-7029
Mfr. Part No.ICAU150
£4.86
Each (In a Bag of 3)
Units
ICAU - Uninsulated - - - 150mm² - - - 12,8mm - - -