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PRODUCT DESCRIPTION
3SB3921-0AK yellow protective collar
Siemens 3SB3921-0AK is a yellow protective collar for the Siemens SIRIUS product family. It provides protective collar for distributed automation, machine control, and industrial communication tasks.
The assembly uses the documented connection, channel, and diagnostic arrangement for this exact order code. Match the complete suffix, terminal method, electrical ratings, and installed system revision before replacement or commissioning.
The assembly uses the documented connection, channel, and diagnostic arrangement for this exact order code. Match the complete suffix, terminal method, electrical ratings, and installed system revision before replacement or commissioning.
BEFORE YOU BUY
Confirm the complete yellow protective collar
ACTUAL APPLICATIONS
Application context for 3SB3921-0AK
3SB3921-0AK supports documented Siemens SIRIUS functions in distributed automation, machine control and process-industry systems where the exact order code must match.
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01 · AUTOMOTIVE MANUFACTURING
Automotive Production and Assembly
Body production linesPowertrain assembly cells -
02 · WATER AND WASTEWATER
Water Treatment and Distribution
Pumping station automationTreatment process monitoring -
03 · FOOD AND PACKAGING
Food Processing and Packaging
Packaging machine controlConveyor handling systems
Technical specifications for 3SB3921-0AK
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Product Model3SB3921-0AK
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Spare Model3921-0AK
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Product ParametersYellow protective collar
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In stock9 units
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ManufacturerSiemens
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Accessory functionProtective collar
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Operator standard22 mm round
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Compatible operatorEmergency-stop mushroom pushbutton
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Key-switch provisionWithout key-operated switch
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Lock provisionWithout lock
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Mounting methodFront plate
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Maximum panel thickness4 mm
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ColorYellow
View all additional
Alternative Names
3921-0AK
3SB39210AK
SIRIUS 22 mm protective collar
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SYSTEM INTEGRATION
Integrate 3SB3921-0AK yellow protective collar
3SB3921-0AK is the documented yellow protective collar for the Siemens SIRIUS family. Its integration basis includes accessory function: protective collar, operator standard: 22 mm round, and compatible operator: emergency-stop mushroom pushbutton, so the connected circuit or network must be engineered to those exact limits.
The installed arrangement must also match key-switch provision: without key-operated switch, lock provision: without lock, and mounting method: front plate. Verify the mating terminal, conductor method, power group, and controller configuration before energizing the product, especially where a neighboring order code uses a different connection or channel arrangement.
During commissioning, apply the documented supply and interface conditions, test each affected channel or communication path separately, and compare field behavior with controller diagnostics. Record the final wiring, addressing, status indications, and measured results so the 3SB3921-0AK configuration can be reproduced during future maintenance.
Features:
- Surrounds the emergency-stop operator with a protective collar
- Reduces unintended contact with the mushroom pushbutton
- Provides a yellow visual boundary around the operator
The 3SB3921-0AK yellow protective collar requires appropriate configuration before system integration and commissioning.
INTERCHANGEABILITY
Verify 3SB3921-0AK yellow protective collar
Use the complete 3SB3921-0AK order code when replacing this yellow protective collar; a similar housing or family number does not confirm interchangeability. Compare accessory function: protective collar, operator standard: 22 mm round, and compatible operator: emergency-stop mushroom pushbutton with the removed product and the current engineering record.
Before removal, document terminal numbers, cable routing, switch positions, mounting orientation, and adjacent module order. The replacement must also satisfy key-switch provision: without key-operated switch, lock provision: without lock, and mounting method: front plate, because these details determine whether the installed electrical and mechanical arrangement can be reproduced.
After fitting the verified 3SB3921-0AK, restore the controlled configuration and repeat the applicable continuity, signal, load, or network tests. Confirm normal status indication and controller diagnostics under the documented operating conditions, then retain the nameplate photographs, configuration record, and acceptance results with the asset history.
Features:
- Maintains direct access for intentional emergency actuation
- Fits the documented 22 mm command-device mounting system
- Defines clearance between the operator and adjacent controls
The 3SB3921-0AK yellow protective collar requires replacement verification against the complete installed configuration and current manufacturer documentation.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: The linked files are Amikong-hosted reference documents. Match their product identity and scope to the supplied assembly, and consult the applicable manufacturer instructions before use. Accessories and additional documents are included only when expressly listed in the quotation.
Features:
- Supports front-panel protection without changing the contact blocks
- Allows collar replacement without rewiring the control circuit
- Preserves operator visibility on crowded control panels
Documentation for the 3SB3921-0AK yellow protective collar must be checked for document applicability before installation or commissioning.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Packed size7.80 × 7.35 × 5.05 cm
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Shipping weight0.07 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8538900000
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OriginGermany
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 3SB3921-0AK
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Which rating controls the yellow emergency-stop collar?
Use the documented Accessory function Protective collar, Operator standard 22 mm round, and circuit limits for this exact yellow emergency-stop collar. -
What must be matched before wiring the yellow emergency-stop collar?
Match its complete order code, Accessory function Protective collar, terminal method, and installed equipment interface. -
How should the yellow emergency-stop collar be commissioned?
Test the yellow emergency-stop collar one circuit or channel group at a time and record the observed status. -
Which compatibility check protects the yellow emergency-stop collar replacement?
Confirm the stated Operator standard 22 mm round, compatible system, terminal base, and engineering configuration. -
What should be photographed around the yellow emergency-stop collar?
Capture labels, wiring positions, switches, adjacent hardware, and mounting orientation before removal. -
Which test record belongs with the yellow emergency-stop collar?
Archive the continuity or signal test, configuration result, visible condition, and final acceptance status. -
What should an MRO buyer request for the yellow emergency-stop collar?
Request the exact yellow emergency-stop collar order code, required condition, quantity, destination, and inspection documents. -
How should a distributor inspect the yellow emergency-stop collar?
Compare the label, construction, connections, and documented Accessory function Protective collar before releasing the shipment.
READY TO VERIFY YOUR PART?
Get a 3SB3921-0AK quote with price, lead time and revision check.
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