Purchase now the Kuhnke UF3-12VDC — Atlantechdrives provides you with this compact 12VDC solenoid actuator from the Kuhnke UF3 series, engineered for precise linear actuation and locking functions in industrial automation, vending, access control, and mechatronic systems.
What Is the Kuhnke UF3-12VDC?
The UF3-12VDC is a DC pull or push solenoid actuator manufactured by Kuhnke (Kendrion), belonging to the UF3 series of compact linear solenoids. The designation breaks down as: UF3 identifies the solenoid body series and stroke/force class within the Kuhnke linear solenoid portfolio; 12VDC specifies the nominal coil operating voltage. The UF3 series covers miniature to compact solenoids designed for short-stroke linear actuation tasks — bolt actuation, pin locking, valve piloting, and mechanism triggering — where a reliable, repeatable electromagnetic linear force is required in a space-constrained installation. Operating at 12VDC, the UF3-12VDC is directly compatible with battery-powered systems, 12V control electronics, automotive-derived industrial equipment, and embedded control boards without requiring step-up voltage conversion. Kuhnke linear solenoids are known for their high force-to-volume ratio, consistent stroke repeatability, and suitability for both intermittent and — depending on configuration — continuous duty cycles.
Key Technical Specifications
- Series: Kuhnke UF3 linear solenoid
- Nominal coil voltage: 12V DC
- Actuation type: Linear pull or push (series-dependent stroke direction)
- Stroke: Per UF3 series specification (consult Kuhnke UF3 datasheet for exact stroke in mm)
- Force at nominal voltage: Per UF3 series force-stroke curve (consult Kuhnke datasheet)
- Duty cycle: Intermittent or continuous depending on UF3 variant
- Coil voltage tolerance: ±10% of nominal (10.8–13.2VDC)
- Insulation class: Class F (155°C)
- Ambient temperature range: -10°C to +50°C
- Body material: Steel housing with precision-machined plunger
- Electrical connection: Flying leads or connector (per variant)
- Protection class: IP20 standard (IP-rated variants available)
Compatibility and Applications
The Kuhnke UF3-12VDC linear solenoid is suited to any application requiring a compact, electrically actuated linear movement at 12VDC. Key application areas include: Access control and locking: Electric bolt actuation in cabinet locks, door latches, and secure enclosure mechanisms. Vending and dispensing machines: Product release mechanisms, coin lock actuators, and dispensing gates. Automotive and mobile equipment: 12VDC bus compatibility makes the UF3-12VDC ideal for vehicle-mounted industrial equipment, forklifts, and mobile automation platforms. Medical and laboratory devices: Sample handling, valve actuation, and mechanism triggering in analytical instruments. Gaming and amusement: Mechanical trigger actuation in coin-operated and redemption equipment. General mechatronics: Any embedded system requiring a reliable, compact electromagnetic linear actuator at 12VDC.
Expert Tips
When integrating the Kuhnke UF3-12VDC into a system design, apply the following expert considerations to maximise performance and reliability: Always operate the solenoid within its rated duty cycle — exceeding the duty cycle leads to coil temperature rise beyond Class F limits and accelerated insulation degradation. If continuous energisation is required, select the continuous-duty variant of the UF3 series. For intermittent duty applications, allow adequate off-time for coil cooling between actuations; the thermal time constant of compact solenoids is short, and rapid successive actuations can cause cumulative overheating. Fit a flyback suppression diode across the coil terminals whenever driving from a transistor, MOSFET, or solid-state output — the inductive spike on de-energisation can reach 10× supply voltage without suppression. Mount the solenoid with the plunger axis aligned precisely with the load axis; off-axis loading creates lateral forces on the plunger bush, accelerating wear and reducing service life. For locking applications, design the mechanism so the solenoid is used to release the lock (de-energised = locked) wherever possible — this provides automatic fail-secure behaviour on power loss.
Frequently Asked Questions
Q: Can the Kuhnke UF3-12VDC be powered from a 12V lead-acid or lithium battery system?
A: Yes, provided the battery terminal voltage under load remains within the ±10% tolerance (10.8–13.2VDC). Note that lead-acid batteries can reach 14.4VDC during charging — verify the maximum charging voltage against the solenoid’s coil voltage maximum to ensure the coil is not over-driven during charge cycles.
Q: How is the UF3-12VDC stroke and force affected as the plunger moves through its travel?
A: Like all electromagnetic solenoids, the UF3-12VDC produces maximum force at the end of stroke (fully retracted plunger, minimum air gap) and minimum force at the start of stroke (maximum air gap). The Kuhnke UF3 force-stroke curve in the product datasheet provides exact force values at each plunger position — always design the load requirement against the force available at the most extended plunger position to ensure reliable actuation throughout the full stroke.
Q: What is the correct way to mount the UF3-12VDC to prevent premature plunger wear?
A: Mount the solenoid rigidly to a flat surface using the body fixing holes, ensuring the plunger axis is collinear with the direction of load travel. Any angular misalignment between the plunger and the actuated mechanism introduces side-loading on the plunger bush, which accelerates bush and plunger wear. Use a floating coupling or self-aligning link between the plunger tip and the load mechanism where perfect alignment cannot be guaranteed.
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