1 Channel Latching Relay Module with Touch Bistable Switch 12 V

Whadda
WPM331
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    Delivery time:1-5 Days
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Whadda WPM331 – 12 V Latching Relay Module with Touch‑Activated Bistable Switch

The Whadda WPM331 (from Velleman) is a compact single‑channel bistable (latching) relay module designed for efficient, reliable switching in 12 V DC applications. Its low trigger current (just 0.5 mA) makes it exceptionally energy‑efficient, while its high switching capacity (10 A at 30 VDC or 250 VAC) supports a wide range of electrical loads.

Key Features & Applications

  • Touch‑activated bistable switch: simple and intuitive control—toggle the relay with a touch.

  • Ultra‑low trigger current (0.5 mA): ideal for battery‑powered or low‑power systems.

  • High current switching: supports loads up to 10 A at 30 VDC or 250 VAC.

  • No soldering required: comes pre‑assembled—perfect for beginners, coding novices, or makers.

  • Compact and lightweight: dimensions ~50 × 25 × 20 mm, weight ~25 g. Fits into tight enclosures.

  • Made in Belgium by Whadda (Velleman Group): trusted quality in maker and STEM electronics.


Why Choose the WPM331?

  • Energy‑efficient design ensures minimal standby power use—even when triggered. velleman.eu

  • Durable switching for powerful loads makes it robust in home, industrial, or maker setups.

  • Tool‑free installation means you get working projects faster—no soldering or programming required.

  • STEM/maker friendly: ideal for learning electronics, prototyping automation, or adding smart control.

  • Compact, ready‑to‑use module—saves you time and effort with plug‑and‑play operation.

Ideal Use Cases

  • Controlling lighting or motors via touch control

  • Battery‑powered systems requiring ultra‑low standby current

  • DIY smart home or maker projects

  • Educational or STEM kits in electronics learning environments

Specification Value
Supply voltage 12 V DC
Operating current 15–50 mA
Trigger current 0.5 mA
Contact rating 10 A @ 30 VDC / 10 A @ 250 VAC
Activation switch Touch‑activated bistable (latching) switch
Dimensions (L×W×H) ≈ 50 × 25 × 20 mm
Weight ≈ 25 g
Skill levels Coding Level 1, Electronics Level 2, Mechanics/Soldering Level 1/none
Colour options Light blue, black, white, others
Product code WPM331 (replaces discontinued VMA331)