The connector shown is commonly known as a 128 Series PCB Screw Terminal Block Connector (KF128 / XY128 type) with 5.08 mm pitch, available in 2-pin and 3-pin versions.
7
128 Connector (KF128 / XY128) – Full Specification
Parameter Specification
Product Name KF128 / XY128 Terminal Block Connector
Type PCB Screw Terminal Block
Mounting Type Through-Hole PCB Mount
Number of Pins 2 Pin / 3 Pin
Pitch 5.08 mm
Wire Entry Top Entry
Connection Type Screw Clamp
Rated Voltage 250V AC – 300V AC
Rated Current 10A – 18A
Wire Range 24~12 AWG (0.2~2.5 mm²)
Contact Material Brass, Tin Plated
Housing Material PA66 Nylon, UL94V-0
Screw Size M2.5 Steel Screw
Insulation Resistance ≥ 5000 MΩ
Withstand Voltage 1500V AC / 1 Minute
Operating Temperature -40°C to +105°C
Color Green
Mechanical Dimensions (Typical)
2-Pin Version
Dimension Value
Length 10.16 mm
Width 8.5 mm
Height 10 mm
Pin Pitch 5.08 mm
3-Pin Version
Dimension Value
Length 15.24 mm
Width 8.5 mm
Height 10 mm
Pin Pitch 5.08 mm
Pin Layout
2-Pin
┌───────┐
│ O O │
└─┬───┬─┘
1 2
3-Pin
┌───────────┐
│ O O O │
└─┬──┬──┬───┘
1 2 3
Applications
Power Supply PCBs
Industrial Control Panels
SMPS Circuits
Automation Equipment
LED Drivers
Battery Chargers
Instrumentation Circuits
Arduino and Embedded Projects
Typical KF128/XY128 connectors use a 5.08 mm pitch, support up to 18 A current, and accept 2.5 mm² wire.
If you need a datasheet drawing with exact length, width, height, and PCB footprint, tell me whether your connector is 2-pin or 3-pin, and I can provide the detailed mechanical drawing.
