The Siemens 3SE50000BA008K is a SIRIUS contact block for 3SE51/52 position switches, featuring 1 NO + 1 NC slow-action contacts. It is designed as a replacement or assembly component for compatible Siemens mechanical position switches and is suitable for machine position monitoring, limit detection, and industrial automation applications. Siemens identifies the corresponding market-facing product as 3SE5000-0BA00, with the same 1 NO/1 NC slow-action contact configuration.
The contact block provides:
The Siemens configuration manual shows the 1 NO + 1 NC slow-action arrangement as code number 11, with terminals represented by 13–14 and 21–22.
This configuration can be used for:
The 3SE50000BA008K uses a slow-action switching mechanism. With this type of contact arrangement, the contact movement corresponds more directly to the mechanical movement of the position-switch actuator.
This makes it suitable for applications where controlled mechanical switching is required rather than a snap-action contact arrangement.
Siemens' product data confirms the product as a 1 NO/1 NC slow-action contact block for 3SE51/52 position switches.
This contact block is intended for use with compatible Siemens SIRIUS 3SE51 and 3SE52 mechanical position switches.
It forms part of the modular position-switch system, where the enclosure, contact block, and actuator components can be combined according to the machine's requirements.
The Siemens configuration manual documents different 3SE51/52 configurations using slow-action contact arrangements, including 1 NO + 1 NC.
The corresponding Siemens contact-block data specifies positive opening: Yes. This feature is relevant when the contact block is incorporated into an appropriately designed safety-related position-switch application.
However, the contact block by itself does not constitute a complete safety system. The complete machine safety circuit must be designed and validated according to the application's safety requirements.
The 3SE50000BA008K can be used in compatible position-switch assemblies for:
For the corresponding 3SE5000-0BA00 contact block, Siemens specifies:
The corresponding Siemens product data specifies a typical mechanical service life of 15 million operating cycles and a typical electrical endurance of 100,000 operating cycles at AC-15, 230 V. Its operating temperature range is -25 °C to +85 °C.
The contact block has a compact 25 mm width and a typical weight of approximately 0.022 kg.
The 1 NO + 1 NC configuration provides both switching states required for many machine-position monitoring circuits.
Because it is a contact block for the modular 3SE51/52 system, it can be used as a replacement component where the compatible contact element needs to be replaced.
The slow-action contact arrangement is suitable for mechanical position-monitoring applications where contact operation follows actuator movement.
It can be incorporated into suitable control, monitoring, limit-switch, and machine-safety arrangements.
Before ordering the 3SE50000BA008K, verify that the existing position-switch assembly is compatible with this contact-block configuration.
Check:
This is particularly important when replacing only the internal contact block rather than the complete position switch.
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It is a contact block for Siemens 3SE51/52 position switches, with 1 NO + 1 NC slow-action contacts.
It has 1 NO contact.
It has 1 NC contact.
Yes. The Siemens product description specifies 1 NO/1 NC slow-action contact.
It is designed for compatible Siemens SIRIUS 3SE51/52 position switches.
The corresponding Siemens contact block has a positive-opening function. However, the complete machine safety system must be appropriately designed and validated for the intended safety function.
The corresponding Siemens product is listed as 3SE5000-0BA00
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3SE5 |
| Model Number | 3SE5000-0BA00-8K |
| Variant | BA008K |
| Product Type | Contact Block |
| Contact Configuration | 1NO + 1NC |
| Switching Function | Snap-Action |
| Connection Type | Screw Terminals |
| Contact Material | Silver |
| Compatible Switches | 3SE51 / 3SE52 |
| Mechanical Service Life | Up to 15 Million Operations |
| Shock Resistance | 30 g / 11 ms |
| Vibration Resistance | 0.35 mm / 5 g |
| Operating Temperature | -25°C to +85°C |
| Storage Temperature | -40°C to +90°C |
| Mounting Method | Modular Plug-In System |
| Weight | Approx. 0.02 kg |
| Brand | Siemens |
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