3SB2-210-0AB01
ActiveSiemens SIRIUS 3SB2 16mm Compact Pushbutton (legacy)
Siemens 3SB2 legacy 30mm push button — predecessor to SIRIUS ACT.
Common Applications
Legacy Siemens 30mm button found on older German/European machinery from 1990-2013. Replaced by the 22mm SIRIUS ACT 3SU1 series. Still available for legacy replacement. If you see 3SB on a Siemens panel, these are the buttons.
Compatibility
Legacy 30mm — not compatible with 22mm SIRIUS ACT. For new builds, migrate to 3SU1 (22mm). 30mm cutout requires adapter plate for 22mm replacement.
Specifications
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Actuator Type
The button head style. Flush sits level with the bezel (prevents accidental presses). Extended protrudes for easy access.
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Flush
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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CE
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Green
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Cutout Diameter
The hole size you drill in your panel to mount this button. 22mm is the most common industrial standard worldwide.
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16mm
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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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Compact plastic (16mm) — NOT 30mm metal
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Pn note
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Stored 30mm/metal was wrong: 3SB2 SIRIUS is a 16mm line. Size corrected to 16mm. Exact color(green?)/contact for 3SB2210-0AB01 not independently reconfirmed — verify against Siemens catalog. Legacy line (succeeded by 3SB3/3SU1).
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Pn status
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size-corrected + color-to-verify
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Series
The manufacturer's product family. Products in the same series share mounting systems and accessories.
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Siemens SIRIUS 3SB2 (16mm compact, legacy; modular)
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Installation Quick Reference
Panel cutout: 16mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).
Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.
Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.
Dimensions
Troubleshooting
Button doesn't respond when pressed
Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.
Works intermittently
Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.
Button feels mushy or doesn't click
The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.
Where to Buy
Price range
$3.02 — $51.07
across 2 distributors
Quick Specs
- Actuator Type
- Flush
- Certifications
- CE
- Color
- Green
- Cutout Diameter
- 16mm
- Material
- Compact plastic (16mm) — NOT 30mm metal
What People Are Saying
“Legacy Siemens 30mm button found on older German/European machinery from 1990-2013. Replaced by the 22mm SIRIUS ACT 3SU1 series. Still available for legacy replacement. If you see 3SB on a Siemens pan”
