SMC SQ2431N-5-C6-Q Solenoid Valve | Replacement, Equivalent & Selection Guide
The SMC SQ2431N-5-C6-Q is a compact, high-reliability 4/2-way single solenoid valve from SMC Corporation’s SQ2000 series, designed for precise pneumatic directional control in industrial automation systems. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make confident sourcing decisions.
Technical Specifications
- Manufacturer: SMC Corporation
- Model Number: SQ2431N-5-C6-Q
- Series: SQ2000
- Valve Type: 4/2-way Single Solenoid, Spring Return
- Port Size: M5 (metric)
- Orifice Diameter: 1.2 mm
- Operating Pressure Range: 0.15 – 0.7 MPa
- Fluid: Air (filtered, lubricated or non-lubricated)
- Voltage: 24 VDC (standard)
- Power Consumption: 0.5 W (energy-saving type)
- Response Time: ≤ 15 ms
- Ambient Temperature: -10°C to +50°C
- Protection Class: IP65
- Connector Type: DIN connector with LED indicator
- Body Material: Aluminum alloy
- Weight: Approx. 100 g
- Certification: CE, RoHS compliant
Compatible Replacement & Equivalent Models
The following models are functionally compatible or serve as direct/near-direct replacements. Always verify port size, voltage, and flow rate before substitution.
- SMC SQ2431N-5-C4-Q — Same series, M5 port, 12 VDC variant
- SMC SQ2431N-5-C8-Q — Same series, M5 port, 48 VDC variant
- SMC SQ2431D-5-C6-Q — Dual solenoid equivalent (4/3-way), same port
- Festo MHE2-M1H-3/2G-M7 — Cross-brand equivalent, 3/2-way, M7 port (verify flow specs)
- Parker 3-way Series 41 — Functional equivalent for low-flow pneumatic circuits
- Airtac 4V110-06 — Economy-grade replacement, 1/8″ BSP port (adapter required)
- CKD 4F310-08-AC220V — Alternative for AC-powered systems (voltage differs)
Note: Cross-brand replacements may require port adapters or wiring modifications. Contact Konmask technical support for compatibility confirmation.
Why Choose the Original Model
- Proven Reliability: SMC SQ2000 series has millions of units deployed globally in demanding industrial environments.
- Energy Efficiency: 0.5 W low-power solenoid reduces heat generation and energy costs in multi-valve manifold systems.
- IP65 Protection: Suitable for wash-down environments and dusty factory floors without additional enclosures.
- Fast Response: ≤15 ms switching ensures precise cycle timing in high-speed automation lines.
- OEM Compatibility: Direct drop-in for existing SMC SQ2000 manifold assemblies — no re-engineering required.
- Global Support: SMC’s worldwide service network ensures long-term parts availability and technical support.
Typical Applications
- Pneumatic cylinder directional control in assembly lines
- Pick-and-place robotic end-effector actuation
- Packaging machinery: filling, sealing, and labeling stations
- Semiconductor and electronics manufacturing
- Food and beverage processing (consult SMC for food-grade seal options)
- Automotive body shop welding fixture clamping
- Medical device manufacturing equipment
System Compatibility
- Manifold: Compatible with SMC SQ2000 series manifold blocks (SS5Q23, SS5Q24)
- PLC Integration: 24 VDC output directly driven by Siemens S7, Mitsubishi Q/FX, Omron CJ/NJ, Allen-Bradley CompactLogix, Beckhoff EtherCAT I/O modules
- Fieldbus: Compatible with SMC EX series fieldbus manifold systems (DeviceNet, PROFIBUS, EtherNet/IP, EtherCAT)
- Tubing: Ø4 mm or Ø6 mm OD polyurethane or nylon tubing (push-in fittings)
- Air Supply: Requires filtered, regulated air supply; 5 μm filter recommended upstream
Selection Guide
Use the following decision matrix to confirm the correct model or identify the right variant:
- Function: 4/2-way spring return → SQ2431N ✓ | 4/3-way dual solenoid → SQ2431D
- Port size: M5 → suffix -5 ✓ | 1/8″ → suffix -08 | 1/4″ → suffix -10
- Voltage: 24 VDC → suffix -C6 ✓ | 12 VDC → -C4 | 100-120 VAC → -C10 | 200-240 VAC → -C12
- Connector: DIN with LED → suffix -Q ✓ | Without connector → suffix -N
- Environment: Standard IP65 → standard model ✓ | Cleanroom → SQ2431N-5-C6-Q-X34
- Manifold mount: Individual body → standard ✓ | Manifold block → order SS5Q24 separately
Quality Assurance & Sourcing
- Authenticity: All SMC products sourced through authorized distribution channels with full traceability documentation.
- Inspection: Each unit undergoes incoming QC: visual check, electrical continuity test, and pressure leak test before dispatch.
- Packaging: Original SMC factory packaging with anti-static and moisture-proof sealing.
- Warranty: 12-month warranty against manufacturing defects from date of shipment.
- Certifications: CE Declaration of Conformity and RoHS compliance documentation available upon request.
How to Order
- Online: Add to cart directly on this page — real-time stock availability shown.
- Bulk / OEM Inquiry: Email support@konmask.com with quantity, delivery location, and required lead time.
- Phone / WhatsApp: +0086 19859288691 (Mon–Sat, 09:00–18:00 CST)
- Quote Request: Provide your BOM or part list for consolidated pricing on multi-line orders.
- Lead Time: In-stock items ship within 1–2 business days; special-order items 5–15 business days.
- Export: International shipping available — DHL, FedEx, UPS, sea freight for large orders.
Replacement & Compatibility FAQ
Q: Can I replace SQ2431N-5-C6-Q with SQ2431D-5-C6-Q?
A: Only if your circuit requires 4/3-way dual solenoid function. The D-suffix model does not spring-return — verify actuator and safety requirements before substituting.
Q: Is the SQ2431N-5-C6-Q compatible with SMC SY series manifolds?
A: No. SQ2000 and SY series use different manifold interfaces. Do not interchange without an adapter plate.
Q: Can I use a 12 VDC PLC output to drive this valve?
A: No. This model requires 24 VDC. Use SQ2431N-5-C4-Q for 12 VDC systems.
Q: What is the service life?
A: SMC rates the SQ2000 series at ≥ 50 million switching cycles under rated conditions with clean, dry air.
Q: Are spare seal kits available?
A: Yes. SMC repair kit: SQ2000-KIT-S. Contact Konmask for availability.
Q: Can Konmask supply the complete manifold assembly?
A: Yes. We supply individual valves, manifold blocks, fieldbus units, and complete sub-base assemblies. Contact us with your system requirements.
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