EN
Toggle switches are important circuit control components on industrial control panels. In the T500 toggle switch series, there are two versions with the same appearance but different pin counts, such as the T501AT: single-pole 2PIN and double-pole 4PIN.
Many customers working with the T500 series do not understand why products with the same function come with different pin counts, and cannot tell the difference between single‑pole and double‑pole versions. Their mechanical and electrical parameters are consistent, but there are significant differences in internal contact structure, pin count, and feel.
Taking T501AT as an example, the following compares the similarities and differences between single‑pole and double‑pole variants.
The similarities between Single Pole and Double Pole
1.Rating value：15A 250VAC/20A 125VAC
2.Mechanical life：50000 Cycles Min
3.Electrical life：20000 Cycles Min
4.Operating force：6N-12N
5.Contact resistance：≥100MΩ（Min）
6.Ambient temperature:-25℃~+85℃
7.Humidity：85%Rh Below
8.Dielectric strength：500V RMS (Min)
9.Mechanical strenght：Impact energy equals（0.5± 0.04)N.m
10.Switch Function:ON-OFF
11.Terminal:Quick-Connect
12.Certifications: IP67, Ce, Fcc, RoHS
The difference between Single Pole and Double Pole
1.Inconsistent feel in operation: The Double Pole version is slightly heavier than the Single Pole version.
2.Inconsistent internal electrical structure: The Double Pole version has one more set of moving and static contacts than the SinglePole version.
3.Inconsistent number of terminal pins: The Single Pole version is 2 PIN, while the Double Pole version is 4 PIN.
4.Control circuit inconsistency: a Single Pole can only control one circuit, while a Double Pole can control two circuits
Summary
The advantage of the single‑pole variant lies in its light toggle feel, simple structure, and cost‑effectiveness, making it widely used for simple and compact control panels.
The advantage of the double‑pole variant is its capability to control two circuits simultaneously, delivering a higher safety level. It is commonly adopted in scissor‑lift control panels.
Customers can select toggle switches with proper pole configurations based on their equipment’s actual requirements.
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