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- Part number
- 6EP4231-7HB00-0AX0
- Model no
- BUF1200
- CE
- EAC
Siemens 6EP4231-7HB00-0AX0 SITOP BUF1200 24V/40A 300ms Power Supply Buffer Module
SITOP BUF1200 buffer module, 24V DC, 300ms at 40A, standalone, no PSU8600 needed
Description
About the BUF1200
About the BUF1200
The Siemens 6EP4231-7HB00-0AX0 is a SITOP BUF1200 buffer module that connects in parallel to the output of a 24 V DC power supply and bridges brief mains interruptions, holding a 40 A load for 300 ms or a 5 A load for up to 2.4 seconds. It accepts 20 ... 30 V DC at the input and needs no PROFINET or PSU8600 rack, so it can be added to any existing 24 V DC supply.
Certifications & Standards
- CE
- EAC
- SEMI F47
- CB
- Shipbuilding
- EPD
Selection Notes
Because the module connects in parallel to an existing 24 V supply through push-in terminals and carries no PROFINET or system-bus dependency, it fits retrofits on any 24 V DC line, not only a Siemens PSU8600 rack. At the full 40 A rating it holds output for 300 ms; if the load drops to 5 A the same energy reserve stretches to about 2.4 seconds, and several BUF1200 units can be paralleled to multiply bridging time at higher loads. The -40 to +70 C operating range is wider than typical 24 V DIN-rail accessories, which matters for outdoor cabinets or unheated switchrooms.
Specification
Full specification
General information 3
| product brand name | SITOP |
|---|---|
| product type designation | BUF1200 |
| type of current supply | 300 ms/40 A |
Input 4
| voltage curve at input | DC |
|---|---|
| supply voltage at DC rated value | 24 V |
| supply voltage at DC | 24 ... 28 V |
| input voltage at DC | 20 ... 30 V |
Memory 2
| design of the mains power cut bridging-connection | Module for buffering during short power interruptions; parallel connection at the output of 24 V power supplies. Buffer time of 300 ms at 40 A up to 2.4 s at 5 A load current; multiplication possible by parallel connection |
|---|---|
| buffering time in the event of power failure | 0.3 min |
Show all 71 specifications ↓ Show less ↑62 more values in Identification, Output, Protection and monitoring, Interfaces, Safety, Standards, specifications, approvals, Standards, specifications, approvals marine classification, Standards, specifications, approvals Environmental Product Declaration, Ambient conditions, Connection method, Mechanical data, Additional information, Version Classification, Logistics.
Identification 10
| Part number | 6EP4231-7HB00-0AX0 |
|---|---|
| Type designation | BUF1200 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4025515155256 |
| ETIM class | EC000382 |
| eCl@ss | 27040705 |
Output 1
| output current: rated value | 40 A |
|---|
Protection and monitoring 1
| display version: for normal operation | LED green for "buffer standby exist" |
|---|
Interfaces 3
| product component PC interface | No |
|---|---|
| product function communication function | No |
| design of the interface | without |
Safety 4
| galvanic isolation between input and output | Yes |
|---|---|
| operating resource protection class | Class III |
| protection class IP | IP20 |
| standard: for interference immunity | EN 61000-6-2 |
Standards, specifications, approvals 6
| certificate of suitability: CE marking | Yes |
|---|---|
| certificate of suitability: UL approval | Yes; cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259 |
| certificate of suitability: EAC approval | Yes |
| certificate of suitability: SEMI F47 | Yes |
| type of certification CB-certificate | Yes |
| standards, specifications, approvals hazardous environments certificate of suitability: ATEX | No |
Standards, specifications, approvals marine classification 3
| shipbuilding approval | Yes |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | Yes; in preparation |
| Marine classification association: Det Norske Veritas (DNV) | Yes; in preparation |
Standards, specifications, approvals Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 68.8 kg |
| global warming potential [CO2 eq]: during manufacturing | 19 kg |
| global warming potential [CO2 eq]: during operation | 49.1 kg |
| global warming potential [CO2 eq]: after end of life | 0.36 kg |
Ambient conditions 4
| ambient temperature: during operation | -40 ... +70 °C; with natural convection |
|---|---|
| ambient temperature: during transport | -40 ... +85 °C |
| ambient temperature: during storage | -40 ... +85 °C |
| environmental category according to IEC 60721 | Climate class 3K3, 5 ... 95% no condensation |
Connection method 3
| type of electrical connection | push-in terminals |
|---|---|
| at input | +: push-in for 0.75 ... 16 mm2 |
| at output | -: push-in for 0.5 ... 6 mm2 |
Mechanical data 11
| width × height × depth of the enclosure | 70 × 135 × 155 mm |
|---|---|
| installation width × mounting height | 70 mm × 225 mm |
| required spacing: top | 45 mm |
| required spacing: bottom | 45 mm |
| required spacing: left | 0 mm |
| required spacing: right | 0 mm |
| fastening method | Snaps onto DIN rail EN 60715 35x7.5/15 |
| DIN-rail mounting | Yes |
| S7 rail mounting | No |
| wall mounting | No |
| housing can be lined up | Yes |
Additional information 1
| other information | Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified) |
|---|
Version Classification 4
| eClass | 16 27-04-07-05 |
|---|---|
| ETIM | 10 EC000382 |
| IDEA | 4 4149 |
| UNSPSC | 15 39-12-10-11 |
Logistics 6
| Net weight | 1.2 kg |
|---|---|
| Country of origin | Romania |
| Shipping weight | 1.7 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
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Certifications
Certifications and standards
- CE
- EAC
- CE marking
- EAC approval
- SEMI F47
- type of certification CB-certificate
- shipbuilding approval
- Environmental Product Declaration
Quick answers
Questions about the BUF1200
What is the rated current of BUF1200?
The rated current of BUF1200 is 40 A.
Which supply voltage is BUF1200 rated for?
The rated operational voltage of BUF1200 is 24 V AC.
What is the HS code of BUF1200 for customs?
The tariff (HS) code on file for BUF1200 is 85049090.
What is the EAN of BUF1200?
The EAN (GTIN) of BUF1200 is 4025515155256.
Where does BUF1200 ship from, and how fast?
BUF1200 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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Series
Siemens SITOP BUF1200
- Brand
- Siemens
- Series
- SITOP BUF1200
