Four-port unmanaged switching in a documented S7-300 module design
Siemens 6GK7377-1AA00-0AA0 is the SIMATIC NET CSM 377 compact switch module for Industrial Ethernet. The Siemens datasheet identifies an unmanaged switch with four RJ45 electrical connections and 10/100 Mbit/s transfer rates. Its housing follows the SIMATIC S7-300 module design and mounts on an S7-300 rail. The official specification lists an external 24 V DC supply through a two-pole terminal block. For replacement planning, verify the exact suffix, rack position, power wiring, network topology and port count; a similar SCALANCE switch is not automatically interchangeable. Stockoems reviews label photographs, commercial condition and requested availability, then coordinates protective packing, shipment tracking, customs paperwork and worldwide delivery.
Condition, availability and warranty are Stockoems commercial terms, not Siemens manufacturer commitments.
| Manufacturer | Siemens |
|---|---|
| Complete Part Number | 6GK7377-1AA00-0AA0 |
| Product Type | CSM 377 compact switch module |
| Network Function | Unmanaged Industrial Ethernet switching |
| Electrical Ports | 4 RJ45 |
| Transfer Rate | 10/100 Mbit/s |
| Rated Supply | 24 V DC external |
| Mounting | SIMATIC S7-300 rail |
01 Port topology
Four RJ45 connections for network nodes.
02 Switch role
Unmanaged 10/100 Mbit/s Ethernet traffic.
03 Cabinet fit
Review S7-300 rail mounting and external 24 V wiring.
It is the Siemens SIMATIC NET CSM 377 compact Industrial Ethernet switch module.
The official datasheet lists four RJ45 electrical connections.
No. Siemens identifies the exact module as an unmanaged switch.
Siemens specifies an external 24 V DC supply.
The official specification lists SIMATIC S7-300 rail mounting.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985
A documented procurement route from identification through after-sales support.


Model and suffix verification, condition confirmation, technical compatibility review and product and label photo confirmation come before an order decision. Our team checks the S7-300 rail location, Ethernet port topology and external supply wiring.
Visual quality checks and label review support item identity. Protective packaging is planned for compact Industrial Ethernet switch module, with handling matched to the shipment.
Worldwide shipping, shipment tracking and customs documentation are coordinated with the destination and carrier. Availability is checked for the requested quantity; no unverified stock count or delivery date is promised.
Written warranty terms, a return authorization process and after-sales response provide a clear communication route if a concern arises after delivery.
Request the exact model and suffix, clear condition terms, actual product and label photos, a compatibility review, traceable shipping documents, written warranty terms and an accessible after-sales contact.
Watch for mismatched labels, vague condition descriptions, unsupported compatibility claims, unexplained substitutions, unrealistic delivery promises and missing return procedures.
Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985
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Send us the complete part number, required quantity, destination country and product label photos. Our team will check availability, condition, compatibility requirements and shipping options.
Email: sales6@apterpower.com WhatsApp: +86 18159889985