Siemens 3SB1400-0A Push Button Contact Block: Complete Technical Guide
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What this delivery is: ten Siemens 3SB14 00-0A contact blocks — the snap-on contact units that sit behind a pushbutton or indicator head — brand new, made in Germany, one-year warranty, received 2026-02-02. Each block is the brown thermoplastic body Siemens uses across the 3SB1 line: one normally-closed and one normally-open contact in a single clip-on unit, screw terminals numbered 1-2 for the NC and 3-4 for the NO, and the full rating block moulded into the back so an electrician can read what they are holding without a datasheet.
What the rating block says
The moulded marking on each block reads: 3SB14 00-0A, SIEMENS, MADE IN GERMANY, CE. The electricals: Ue 660V AC rated insulation voltage, AC-12 duty 10 A, AC-15 duty 6 A at 230 V — that is the honest current story behind the record's short "300V, 10A" note: 10 A is the AC-12 (resistive) figure, and the contact is marked for use above 300 V under UL, listed 165 degrees C industrial control equipment, A600 P600 pilot duty, same polarity, to VDE 0660 and IEC 947-5-1. The little wiring diagram beside the ratings shows the two contact paths — 2 to 1 and 4 to 3 — with the changeover arrow.
| Item | Value on the unit |
|---|---|
| Product | Siemens 3SB14 00-0A contact block for pushbuttons / indicators |
| Contacts | 1 NC + 1 NO (terminals 1-2 NC, 3-4 NO), screw terminals |
| Ratings | Ue 660V AC; AC-12 10 A; AC-15 6 A at 230 V |
| Standards | VDE 0660, IEC 947-5-1; UL Listed 165C IND. CONT. EQ., ABOVE 300V, A600 P600, SAME POL. |
| Mounting | Snaps onto 3SB1 pushbutton / lamp holders; front actuator pin |
| Origin / marking | SIEMENS, MADE IN GERMANY, CE |
| Quantity / condition | 10 blocks, brand new, 1-year warranty |
| Weight / received | 0.5 kg; received 2026-02-02 |
How it is used
Contact blocks like this are the working half of every operator station: the coloured head you press is just the mechanism — the 3SB14 00-0A is what actually opens and closes the circuit. The block slides onto the button holder from the back until it clips, the moving pin rides on the head's actuator, and the two screw terminals land the panel wiring. Having one NC and one NO in the same unit is the common starter-panel combination: the NC leg breaks a seal-in or interlock circuit while the NO leg makes the start command, from a single block behind a single head. Rated 660 V insulation with an AC-15 duty figure for inductive electromagnetic loads, it covers everything from a 24 V PLC input to a 230 V contactor coil without derating arithmetic. Ten identical blocks is a maintenance-stock quantity — one panel rebuild usually consumes them in pairs.
Photos and video
Video: inspection clip of the 3SB14 00-0A blocks before dispatch.
Related products on KOEED
A pushbutton contact block from another family in the catalogue: the LAY7 PBCY090 push button contact — same role behind a different button series.
Need 3SB14 00-0A blocks, another 3SB1 contact variant, or NC-only / NO-only units? Send the part number and quantity — we confirm stock with photos.
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