SMC S070C-RBG-32 — S070 Series 7mm Ultra-Compact 3-Port Solenoid Valve, 0.35W, 3V DC
2026-06-08The SMC S070C-RBG-32 is an ultra-compact direct-operated 3-port solenoid valve from the S070 series, featuring a body width of just 7 mm and a weight of only 5 g. It uses a body-ported design with barbed fittings for Ø3.18/Ø2 mm tubing, and is configured as normally open (N.O.). Operating on 3 V DC at just 0.35 W, with a response time of ≤ 3 ms and noise under 38 dB(A), this valve is purpose-built for analytical instruments, in-vitro diagnostic equipment, semiconductor micro-environment control, and laboratory automation where space, power, and noise constraints are critical.
Product Specifications
| Parameter | Value |
|---|---|
| Manufacturer | SMC |
| Series | S070 (Ultra-Compact Direct-Operated 3-Port Solenoid Valve) |
| Model | S070C-RBG-32 |
| Valve Construction | Poppet |
| Positions / Ports | 2-Position / 3-Port |
| Switching Type | Normally Open (N.O.) |
| Return Action | Self-recovery (pressure differential return) |
| Mounting | Body Ported (direct plumbing) |
| Fittings | Barbed couplers — Ø3.18/Ø2 mm tubing |
| Rated Voltage | 3 V DC |
| Allowable Voltage Fluctuation | ±10% of rated voltage |
| Power Consumption | 0.35 W |
| Electrical Entry | Grommet (direct lead wire) |
| Usable Fluids | Air / Low vacuum (1.33 × 10² Pa) |
| Max. Operating Pressure | 0.3 MPa (0.35 W variant) |
| Proof Pressure | 1 MPa |
| Cv Value | 0.011 |
| C Value | 0.042 dm³/(s·bar) |
| b Value (Critical Pressure Ratio) | 0.27 |
| Response Time ON | ≤ 3 ms |
| Response Time OFF | ≤ 3 ms |
| Operating Noise | ≤ 38 dB(A) |
| Seal Type | Soft seal (elastomeric) |
| Lubrication | Not required |
| Enclosure Rating | IP40 |
| Coil Insulation Class | Class B or equivalent |
| Ambient / Fluid Temperature | -10°C to +50°C |
| Mounting Orientation | Free |
| Vibration Resistance | 30 m/s² |
| Impact Resistance | 150 m/s² |
| Weight | Approx. 5 g |
| Valve Width | 7 mm |
| Manual Override | Not provided |
| Manifold Compatibility | SS073 stacking base |
Model Number Breakdown
- S070: S070 series ultra-compact direct-operated 3-port solenoid valve
- C: Body type — body ported (direct plumbing)
- R: Coil rated voltage — DC 3 V
- B: Power/pressure/flow class — 0.35 W, max 0.3 MPa, Cv 0.011
- G: Electrical entry — Grommet (direct lead wire)
- 32: Port specification — barbed couplers, Ø3.18/Ø2 mm tubing
Key Features and Benefits
Extreme Miniaturisation: 7 mm Wide, 5 g
With a valve width of just 7 mm and weighing only 5 g, the S070C-RBG-32 easily integrates into portable analysers, microfluidic chip platforms, and handheld medical devices where space and weight are at an absolute premium. The SS073 stacking manifold base allows multiple valves to be densely integrated within an extremely small footprint for multi-channel centralised control.
Ultra-Fast ≤ 3 ms Response
Both ON and OFF response times are ≤ 3 ms, meeting the demands of high-frequency switching and precise timing control. The valve excels in timing-critical applications such as sheath fluid switching in flow cytometers, chromatography injection valve control, and microfluidic droplet generation.
Ultra-Quiet Operation ≤ 38 dB(A)
Operating noise is kept under 38 dB(A) — comparable to a quiet library environment. This makes the S070 series particularly suitable for benchtop laboratory equipment, clinical diagnostic instruments, and other noise-sensitive indoor applications.
0.35 W Ultra-Low Power with 3 V Drive
With only 0.35 W power consumption and 3 V DC operation, the valve can be driven directly from batteries or controlled via low-power MCU GPIO without additional driver circuitry. This is ideal for portable battery-powered devices, significantly extending operating autonomy.
Low Vacuum Compatible
The valve handles both positive-pressure air and low vacuum down to 1.33 × 10² Pa, enabling universal use in both pressure and micro-vacuum circuits commonly required in analytical instrument gas path designs.
Applications
- In-Vitro Diagnostics (IVD): fluidic/pneumatic switching in chemiluminescence analysers, biochemistry analysers, and haematology analysers
- Flow Cytometry: precise sheath/sample stream switching control
- Chromatography and Mass Spectrometry: injection valve and column switching valve actuation
- Microfluidic Systems: droplet generation and micro-reactor pneumatic switching
- Semiconductor Equipment: micro-environment gas switching, wafer transfer air bearing control
- Respiratory and Anaesthesia Devices: miniature gas circuit switching, O₂/air ratio control
- Environmental Monitoring: gas sampling circuit switching
- Laboratory Automation: pipetting workstations, sample preparation pneumatic control
S070 Series Selection Guide
| Characteristic | S070B (N.C.) | S070C (N.O.) |
|---|---|---|
| De-energised State | Port closed | Port open |
| Actuation Mode | Energise to open | Energise to close |
| Typical Application | Safety shutoff, emergency cut-off | Continuous purge, fail-safe open protection |
| Power Classes | 0.35 W / 0.5 W / 1 W | 0.35 W / 0.5 W / 1 W |
Related Models
| Model | Description |
|---|---|
| S070B-RBG-32 | Normally closed (N.C.), same specifications |
| S070C-5BG-32 | 24 V DC version, same flow class |
| S070C-RDG-32 | 3 V DC, DIN terminal connector |
| S070C-RAG-32 | 3 V DC, 0.5 W / 0.5 MPa, Cv 0.014 |
| S070C-RCG-32 | 3 V DC, 1.0 W / 0.7 MPa, Cv 0.016 |
FAQ
Q: The S070C-RBG-32 is Normally Open — does that mean air flows through it when de-energised?
Yes. The S070C-RBG-32 is configured as normally open (N.O.), meaning the valve port remains open and the air/vacuum circuit is conductive when de-energised. Energising the coil closes the valve and shuts off the circuit. For a de-energised-closed configuration, choose the normally closed variant S070B-RBG-32.
Q: How can the 3 V supply be implemented? Can batteries drive it directly?
A 3 V supply can be provided by two AA/AAA alkaline cells in series (approximately 3 V), a 3.3 V low-voltage power rail, or an MCU GPIO output with simple level shifting. At 0.35 W and 3 V, the current draw is approximately 117 mA — battery-powered designs should ensure the power source can deliver this current consistently.
Q: Can this valve be used with liquid media?
The standard model is designed for air and low vacuum service and is not recommended for direct liquid contact. For liquid switching applications, consider SMC’s dedicated liquid solenoid valve series (e.g. LVM series).
In stock and available for bulk orders. Contact us for a quotation, selection assistance, or technical consultation.