21-CQSB

Name: SMC 21-CQSB — 10-11-21-22-CDQS Compact Cylinder Double Acting Clean Room
Brand: SMC

SMC 21-CQSB — 10-11-21-22-CDQS Compact Cylinder Double Acting Clean Room

The SMC 21-CQSB is an official catalog model within the CQS Compact Actuator product series, featuring a relief type configuration that is copper, fluorine, and silicon-free with low particle generation. This unit offers bore sizes of 12mm, 16mm, 20mm, and 25mm, stroke lengths ranging from 5mm to 50mm, and a choice of female or male rod end threads with optional built-in magnets and various auto switch configurations and lead wire lengths. Submit the exact part number, quantity, and application requirements to receive a formal quotation for this SMC component.

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Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued SMC references — within one business day.

Manufacturer: SMC
Part number: 21-CQSB
Product series: CQS Compact Actuator
Data verification: Manufacturer evidence reviewed

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Exact part-number verificationTechnical properties are matched to 21-CQSB.

Worldwide sourcingSupport for planned and urgent industrial requirements.

Manufacturer documentationA document is added when the reviewed source provides one.

Verified configuration

Technical Specifications

Product Series: CQS Compact Actuator
Configuration Status: Official catalog model
Clean Series: 10 (Relief Type), 11 (Vacuum Suction Type), 21 [Relief Type (Copper, Fluorine and Silicon-free + Low Particle Generation)], 22 [Vacuum Suction Type (Copper, Fluorine and Silicon-free + Low Particle Generation)]
-: -
C: C
Magnet: None, D (Built-in)
QSB: QSB
Bore Size: 12mm, 16mm, 20mm, 25mm
Stroke: 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm
D: D
Rod End Thread: Female, M (Male)
Auto Switch: No Switch, M9B--Solid State, Gen. Purpose, 2 Wire, Horizontal, M9BA--Solid State, Water Resist., 2 Wire, Horizontal, M9BV--Solid State, Gen. Purpose, 2 Wire, Vertical, M9BW--Solid State, 2-color Indication, 2 Wire, Horizontal, M9BWV--Solid State, 2-color Indication, 2 Wire, Vertical, M9N--Solid State, Gen. Purpose, 3 Wire NPN, Horizontal, M9NV--Solid State, Gen. Purpose, 3 Wire NPN, Vertical, M9NW--Solid State, 2-color Indication, 3 Wire NPN, Horizontal, M9NWV--Solid State, 2-color Indication, 3 Wire NPN, Vertical, M9P--Solid State, Gen. Purpose, 3 Wire PNP, Horizontal, M9PV--Solid State, Gen. Purpose, 3 Wire PNP, Vertical, M9PW--Solid State, 2-color Indication, 3 Wire PNP, Horizontal, M9PWV--Solid State, 2-color Indication, 3 Wire PNP, Vertical, A90--Reed, AC Volt, Horizontal, A90V--Reed, DC Volt, AC Volt, Vertical, A93--Reed, DC Volt, AC Volt, LED, Horizontal, A93V--Reed, DC Volt, AC Volt, LED, Vertical, A96--Reed, DC Volt, LED, Horizontal, A96V--Reed, DC Volt, LED, Vertical
Lead Wire or Prewired Connector: 0.5m (Or None in the Case of No Switch), L (3m), M (1m), Z (5m), SC (0.3m Cord Length, M12-4 Pin Connector, 3 & 4 Out), SAPC (0.5m Cord Length, M8-3 Pin Connector), SBPC (0.5m Cord Length, M8-4 Pin Connector), SDPC (0.5m Cord Length, M12-4 Pin Connector), MAPC (1.0m Cord Length, M8-3 Pin Connector), MBPC (1.0m Cord Length, M8-4 Pin Connector), MDPC (1.0m Cord Length, M12-4 Pin Connector)
Number: 2 pcs. (Or None in the Case of No Switch), 3 pcs., 4 pcs., S (1 pc.)

Engineering context

Identification and RFQ Guidance

Confirm the exact configuration

Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

What to include in your RFQ

Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.

Technical verification

Our sourcing response is prepared against SMC 21-CQSB. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.