3SU1100-0AB40-1BA0

1. Overview

The Siemens 3SU1100-0AB40-1BA0 is a 22mm round, non-illuminated, momentary (spring-return) flush pushbutton from the SIRIUS ACT 3SU1 series — Siemens' flagship modular industrial pushbutton family. The part number decodes as: 3SU1100 = non-illuminated, flat actuator, plastic body; 0AB40 = green actuator color; 1BA0 = complete unit with holder and 1 NO (normally open) contact block with screw terminals. It ships as a complete unit (actuator + holder + contact module), making it a ready-to-install solution. The SIRIUS ACT range is Siemens' successor to legacy pushbutton lines, designed for demanding industrial environments with a modular snap-on architecture.

2. User Sentiment

No significant user reviews or forum discussions specific to this part number were found in the gathered sources. The product is consistently described across distributor pages as an industry-standard component and a "proven component in industry processes." Rapid Electronics' UK listing for the equivalent black variant (3SU1100-0AB10-1BA0) shows no customer reviews posted, suggesting a professional-use product where purchase decisions are spec-driven rather than review-driven. SINTRONICS offers repair, refurbished, and exchange services for this part, indicating it is well-established in long-running installations where replacements are needed.

3. Real-World Applications

The SIRIUS ACT 3SU1100 series is used broadly across industrial automation and machinery control panels. Siemens targets this product line at OEMs, automotive production, food and beverage processing, pharmaceutical manufacturing, and packaging operations. The IP66/IP67/IP69K ingress protection rating makes it suitable for washdown environments (food/beverage, pharma). ATEX certification (IEC 60079-11:2011) permits use in intrinsically safe circuits in hazardous-area installations. Its resistance to oils and caustic solutions extends suitability to chemical processing and heavy manufacturing.

4. Technical Specifications

• Type: Non-illuminated, flush/flat pushbutton, complete unit (actuator + holder + 1 NO contact block)
• Series: Siemens SIRIUS ACT 3SU1
• Actuator Color: Green
• Actuator Shape: Round, flat (flush)
• Body Material: Plastic (actuator and front ring)
• Mounting Hole (cutout): 22mm (22.3mm actual hole diameter)
• Button Diameter: 29.45–29.5mm
• Operation: Momentary (spring-return)
• Contact Configuration: SPST-NO (1 normally open contact)
• Contact Current Rating: 10A AC/DC
• Rated Voltage: 500V AC/DC
• Terminal Type: Screw terminal
• IP Rating: IP66 / IP67 / IP69K
• Operating Temperature: -25°C to +70°C
• Mechanical Life: 10,000,000 cycles
• Electrical Life: 10,000,000 cycles
• Weight: 0.05 kg
• Origin: Germany
• Standards: IEC 60947-1, EN 60947-1, IEC 60947-5-1, EN 60947-5-1
• Certifications: CE, UKCA, cULus, CCC, EAC, RoHS compliant, ATEX (series)
• EAN: 4011209959378

5. Ordering & Compatibility

Pricing ranges from approximately £13.41 (Parmley Graham UK), €25.99 (Conrad), and USD $44.75/unit (DigiKey qty 1) down to ~$31.36 at qty 250+. The product is active and stocked at major distributors globally including DigiKey (PN: 3473-3SU11000AB401BA0-ND), RS Components (RS 874-2033), Conrad (article 1379609), Kempston Controls, and MISUMI. A laser-labeled variant exists as 3SU1100-0AB40-1BA0-Z Y11 (upper case lettering). Compatible accessories include 3SU14xx series contact blocks (e.g., 3SU1400-1AA10-1BA0 for additional 1NO, 3SU1400-1AA10-1CA0 for 1NC), which can be stacked onto the holder. The 3SU1100-0AB40-1FA0 is the same actuator/color with 1NO+1NC contact configuration. The illuminated equivalent is 3SU1106-0AB40-1BA0 (LED, same actuator color/size). 3SU1101-0AB40-1BA0 is the stainless-steel/metal body variant. The 3SU1156-0AB40-1BA0 is a higher-spec illuminated variant.

6. Known Issues

No significant issues reported in available sources. Some distributor pages (electricautomationnetwork.com, Ford Electric Supply) returned HTTP 403 errors, limiting direct price comparison. SiePortal pages require JavaScript and could not be fetched directly. The Conrad listing showed limited stock (5 units from German warehouse) suggesting occasional supply constraints, though DigiKey and RS carry stock with standard 5-week manufacturer lead times. No field failure reports or application warnings were found.