SIMATIC S7-300
Compact S7-300 CPU with 64 KB work memory, MPI, 10 digital inputs, 6 digital outputs and two 10 kHz counters.
Siemens 6ES7312-5BF04-0AB0 is a SIMATIC S7-300 CPU 312C compact controller with 64 KB work memory. The unit integrates 10 digital inputs, 6 digital outputs, two 10 kHz high-speed counters and an MPI communication interface.
The CPU operates from 24 V DC and requires a 40-pole front connector and SIMATIC Micro Memory Card. A replacement must be checked against the existing STEP 7 project, firmware, memory card, I/O wiring and MPI network settings.
| Commercial field | Verified status |
|---|---|
| Manufacturer | Siemens |
| Complete part number | 6ES7312-5BF04-0AB0 |
| Product lifecycle | Prod. Cancellation |
| PLM effective date | Product phase-out began 2023-10-01; current status is Prod. Cancellation |
| Official designation | SIMATIC S7-300 CPU 312C compact CPU |
| Required accessories | 40-pole front connector and Micro Memory Card |
| Country of origin | Germany |
| Technical field | Manufacturer data |
|---|---|
| Controller family | SIMATIC S7-300 |
| CPU type | CPU 312C compact CPU |
| Work memory | 64 KB |
| Load memory | SIMATIC Micro Memory Card required; up to 8 MB |
| Integrated digital inputs | 10 |
| Integrated digital outputs | 6 |
| High-speed counters | 2 × 10 kHz |
| Communication interface | MPI |
| Rated supply | 24 V DC |
| Permissible supply range | 19.2 to 28.8 V DC |
| Nominal current consumption | 570 mA |
| No-load current | 90 mA |
| Power loss | 8 W |
| Engineering software | STEP 7 V5.5 SP1 or STEP 7 V5.3 SP2 with HSP 203 |
| Firmware version | V3.3 |
| Dimensions (W × H × D) | 80 × 125 × 130 mm |
| Device weight | Approx. 410 g |
| Siemens net weight | 0.458 kg for this exact order number |
| Application | Fit and use |
|---|---|
| Compact machine control | Combines CPU processing and onboard digital I/O for small automation cells. |
| Counting and pulse acquisition | Two integrated 10 kHz counters support machine-speed and position-related signals. |
| MPI-based S7-300 networks | Integrates with existing MPI programming and communication structures. |
| Legacy S7-300 maintenance | Preserves a qualified CPU 312C project when an exact spare is required. |
Siemens currently marks 6ES7312-5BF04-0AB0 as Prod. Cancellation. Earlier official lifecycle data recorded product phase-out from 2023-10-01. Do not treat another S7-300 CPU as a drop-in replacement without checking memory, integrated I/O, firmware and project compatibility.
It is a compact SIMATIC S7-300 CPU 312C with 64 KB work memory and integrated digital I/O.
It provides 10 digital inputs, 6 digital outputs and two 10 kHz high-speed counters.
Yes. Siemens specifies a SIMATIC Micro Memory Card, with supported capacity up to 8 MB.
Siemens lists STEP 7 V5.5 SP1 or STEP 7 V5.3 SP2 with HSP 203 for the documented V3.3 configuration.
Check the complete order number, firmware, MMC image, STEP 7 project, MPI settings, front connector and onboard I/O wiring.
Send the complete part number, quantity and installed-system details for stock verification, compatibility review, global delivery planning and warranty confirmation.
6ES7312-5BF04-0AB0
Practical support for identification, compatibility review, sourcing, inspection, packing and global industrial spare-parts delivery.
Our team reviews the complete order code, requested quantity, destination and documentation needs.
Nameplates, interface panels, terminals, firmware labels and physical condition can be checked before approval.
Industrial electronics are packed for international transit with shipment records and delivery coordination.
| Stage | What we review |
|---|---|
| 1. Request assessment | Complete part number, quantity, required condition, destination and timing. |
| 2. Identity evidence | Readable nameplate, suffix, firmware, connectors, storage media and housing condition. |
| 3. Compatibility check | Installed system, interface configuration, engineering software, power and mechanical fit. |
| 4. Delivery preparation | Packing, shipping documentation, warranty statement and worldwide logistics coordination. |
We can review long industrial order numbers, hardware revisions, suffixes and accessory requirements so the inquiry is tied to the installed configuration rather than only the product family.
Where the manufacturer publishes lifecycle or successor information, we present the original status wording and flag the system checks required before migration.
Available inspection evidence may include nameplate, connector, terminal, storage-media and housing photographs. Documentation requests can be coordinated with the order review.
Orders can be prepared for international shipment with protective packing appropriate to industrial electronics, tracking coordination and stated warranty terms.
Send the complete part number, clear nameplate photos, firmware or software version, installed system, required quantity, destination country and any deadline.
A mixed-brand reference list for maintenance and procurement teams. Each part number must be checked independently for function and compatibility.
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