# OT400U12-121

ABB OT400U12-121: switching-equipment reference for switch installation and operating arrangement. Manufacturer reference 1SCC307710F0001; OT400U12-121.STP.

## Equipment and file summary

Equipment / resource: OT400U12-121
Manufacturer: ABB
Resource type: Named drawing reference
Manufacturer drawing: 1SCC307710F0001; OT400U12-121.STP
Manufacturer reference: 1SCC307710F0001; OT400U12-121.STP
Document revision: A
Listed file formats: DXF, STEP
Listed files: 2
Available previews: 1 interactive model variants
Recorded revisions: A
Source checked: 2026-11-04
Download access: Email registration for site downloads; official source links are also available

## Related GA references

- [Switchgear panel](https://eloragrid.ai/objects/switchgear-panel)
- [Switchboard](https://eloragrid.ai/objects/switchboard)
- [Ring main unit](https://eloragrid.ai/objects/ring-main-unit)

Canonical page: https://eloragrid.ai/tools/cad-library/equipment/abb-ot400u12-121-325bc05a42
Manufacturer: ABB
Entry type: Named drawing reference
Part number: Not specified — select exact configuration
Category: Switchboards & switchgear
Formats: DXF, STEP
Market discovery: Global
Access: Direct download
Official source: https://search.abb.com/library/Download.aspx?DocumentID=1SCC307710F0001&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
Manufacturer evidence: https://search.abb.com/library/Download.aspx?DocumentID=1SCC307710F0001&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
Source checked: 2026-11-04

2 original files are available to download here. Manufacturer sources and revisions are listed below.
Confirm the exact regional configuration against the selected manufacturer drawing.
The supplied configuration is “OT400U12-121”. Keep those frame, mounting and accessory codes with the inserted drawing.


## In plain English

### Using the OT400U12-121 reference

ABB OT400U12-121: switching-equipment reference for switch installation and operating arrangement. Manufacturer reference 1SCC307710F0001; OT400U12-121.STP.

### A simple example

Use OT400U12_121_1SCC307710F0001.dxf revision A for editable DXF drawing geometry. Keep its original layers and dimension annotations when inserting the drawing.

### What the drawings help you do

Use OT400U12_121_1SCC307710F0001.dxf revision A for editable DXF drawing geometry. Keep its original layers and dimension annotations when inserting the drawing. Use OT400U12_121.stp revision A for the supplied solid assembly in your 3D layout.

### Before using this reference

- The supplied configuration is “OT400U12-121”. Keep those frame, mounting and accessory codes with the inserted drawing.
- Check whether this reference is the switch body, an operating handle or another accessory. Handle and shaft references do not give the complete switch envelope or terminal clearances.

### What can I use the OT400U12-121 reference for?

Use this switching-equipment reference for switch installation and operating arrangement. The supplied configuration is “OT400U12-121”. Keep those frame, mounting and accessory codes with the inserted drawing.

### Which manufacturer reference identifies this drawing?

ABB reference 1SCC307710F0001; OT400U12-121.STP. The file list retains the original source and recorded revision.

### Terms


Concept diagram: Identify OT400U12-121 → Select the drawing or model → Check the mounting interface
The supplied configuration is “OT400U12-121”. Keep those frame, mounting and accessory codes with the inserted drawing.

- [ABB source](https://search.abb.com/library/Download.aspx?DocumentID=1SCC307710F0001&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A)


## Which file should I choose?

Use OT400U12_121_1SCC307710F0001.dxf revision A for editable DXF drawing geometry. Keep its original layers and dimension annotations when inserting the drawing. Use OT400U12_121.stp revision A for the supplied solid assembly in your 3D layout.

## Official files

- OT400U12_121_1SCC307710F0001.dxf (DXF): https://search.abb.com/library/Download.aspx?DocumentID=1SCC307710F0001&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
  Site download: https://eloragrid.ai/tools/cad-library/download/abb-ot400u12-121-325bc05a42/8e3927d96380ec1afa49
  Hosting basis: no-explicit-prohibition; publisher attribution: ABB; reviewed: 2026-11-04
  Rights review: Reviewed the available source, embedded drawing text and archive notices. No explicit applicable redistribution prohibition was identified. Rights remain unknown; no licence or manufacturer endorsement is asserted.; evidence: https://search.abb.com/library/Download.aspx?DocumentID=1SCC307710F0001&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
  Purpose: Manufacturer drawing reference 1SCC307710F0001; acquired: true; redistribution: unknown; SHA-256: 8e3927d96380ec1afa4964d0a0151b07531fd55870d9051f895500639856d033; revision: A
- OT400U12_121.stp (STEP): https://search.abb.com/library/Download.aspx?DocumentID=OT400U12-121.STP&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
  Site download: https://eloragrid.ai/tools/cad-library/download/abb-ot400u12-121-325bc05a42/939407aade9619343b4d
  Hosting basis: no-explicit-prohibition; publisher attribution: ABB; reviewed: 2026-11-04
  Rights review: Reviewed the available source, embedded drawing text and archive notices. No explicit applicable redistribution prohibition was identified. Rights remain unknown; no licence or manufacturer endorsement is asserted.; evidence: https://search.abb.com/library/Download.aspx?DocumentID=OT400U12-121.STP&LanguageCode=en&DocumentPartId=&Action=Launch&DocumentRevisionId=A
  Purpose: Manufacturer drawing reference OT400U12-121.STP; acquired: true; redistribution: unknown; SHA-256: 939407aade9619343b4d69a3559437703d27af5748784a67411baae14abf1ec2; revision: A

Global discovery is not proof of regional certification. Confirm exact configuration, revision, dimensional units and use rights with the manufacturer.