3.5mm PCB universal electronic block connector, 2 ~ 24 poles
Description:
PCB terminal blocks are modular, insulated devices that mount on
printed circuit boards (PCBs) and secure two or more wires
together. Terminal blocks are used to secure and/or terminate wires
and, in their simplest form, consist of several individual
terminals arranged in a long strip. Terminals are useful for
connecting wiring to a ground or, in the case of electrical power,
for connecting electrical switches and outlets to the mains.
PCB universal screw terminal block have different pitches like
3.5mm, 3.81mm, 5.0mm, 5.08mm, 6.35mm, 7.5mm, 7.62mm, 9.5mm, 10.0mm
and 10.16mm. Also they have three types to insert lines: 90°, 135°
and 180°, designed with monolayer, double decks and three decks.
Compared to other types of connectors, terminal blocks are low in
cost. And it can be re-used in the field, allowing for the
replacement of wires or equipment, generally with standard hand
tools. It usually avoid the requirement for a specialized mating connector to be applied to the ends of wires.
Applications:
The terminal blocks are used in almost all electric appliances that
need 240-volt power supply.
Electrical and Mechanical:
| Voltage rating | 300V(UL), 130V(IEC) |
| Current rating | 16A, 10A |
| Insulation resistance | 500MΩ/DC500V |
| Withstanding voltage | AC1250V/1min |
| Wire range | 24-18AWG 1.0mm² |
| Strip length | 5-6mm |
| Operating temperature | -40℃～+105℃ |
| Soldering temperature | 250℃ ±5℃ / 5S |
Dimension:(mm)
N=Number of poles
Dim P=(N-1)*3.50
Dim L=N*3.50
| Dim P | Dim L |
| 2-6P | ±0.10 | ±0.15 |
| 7-12P | ±0.20 | ±0.20 |
| 13-18P | ±0.25 | ±0.30 |
| 19-24P | ±0.30 | ±0.40 |
Terminal blocks selection guide:
PCB terminal blocks can be classified according to their structure
as well as device type.
The difference between blocks can lead to problems if an incorrect
type is used or if it is not connected properly. Follow the advice
below:
• Look at the electrical equipment you are working on to see what
type of connection it requires; normally you will have either a
screw-in or plug-in connection. Screw-in wires are placed inside
the terminal block and screwed into position, and they are most
common for equipment that does not require high voltage protection.
A variation on the screw-in connection is one held in place by a
spring mechanism. This connector can reduce the time spent on the
job because you simply clip it into place instead of removing and
replacing the screw.
A plug-in connection has a male terminal at the end of the wire.
This terminal is connected to the female port on the terminal block
and forms a secure connection. Plug-in blocks are commonly used in
the fuse boxes of automobiles.
• Once you know the type of connection that is required, you need to
find a terminal block that fits the rest of your requirements.
Consider what space you have for the connection and how many wires
need to be connected. Terminal blocks are supplied in a variety of
shapes and sizes, so you should be able to find one that suits your
needs.
• Choose the correct rating. 3A, 5A, 15A, or 30A terminal blocks are
widely available, and you'll want to buy the one that meets the
highest current level that it will conduct in order to allow the
most powerful piece of equipment to function.
