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
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Touch‑activated bistable switch: simple and intuitive control—toggle the relay with a touch.
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Ultra‑low trigger current (0.5 mA): ideal for battery‑powered or low‑power systems.
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High current switching: supports loads up to 10 A at 30 VDC or 250 VAC.
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No soldering required: comes pre‑assembled—perfect for beginners, coding novices, or makers.
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Compact and lightweight: dimensions ~50 × 25 × 20 mm, weight ~25 g. Fits into tight enclosures.
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Made in Belgium by Whadda (Velleman Group): trusted quality in maker and STEM electronics.
Why Choose the WPM331?
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Energy‑efficient design ensures minimal standby power use—even when triggered. velleman.eu
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Durable switching for powerful loads makes it robust in home, industrial, or maker setups.
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Tool‑free installation means you get working projects faster—no soldering or programming required.
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STEM/maker friendly: ideal for learning electronics, prototyping automation, or adding smart control.
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Compact, ready‑to‑use module—saves you time and effort with plug‑and‑play operation.
Ideal Use Cases
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Controlling lighting or motors via touch control
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Battery‑powered systems requiring ultra‑low standby current
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DIY smart home or maker projects
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Educational or STEM kits in electronics learning environments
