{"product_id":"rc-snubber-circuit-module-relay-contact-protection-5v-400v","title":"RC Snubber Circuit Module – Relay Contact Protection 5V-400V","description":"\n\u003ch2\u003eALLOYSEED RC Snubber Circuit Module – Relay \u0026amp; Thyristor Contact Protection\u003c\/h2\u003e\n\u003cp\u003eKeep your relays, thyristors, and microcontrollers safe from damaging voltage spikes with the \u003cstrong\u003eALLOYSEED RC Absorption (Snubber) Circuit Module\u003c\/strong\u003e. This compact board connects an RC series network in parallel with your switching device to suppress the induced electromotive force (EMF) generated by inductive loads the moment they switch on or off — extending component life and reducing electromagnetic interference.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is an RC Snubber Circuit?\u003c\/h3\u003e\n\u003cp\u003eAn RC snubber circuit is a resistor-capacitor series network placed in parallel with a switching device (such as a relay or thyristor). When an inductive load switches, stored energy can produce a high-voltage transient spike. The snubber absorbs this energy, smoothing the voltage and current waveforms and preventing damage to sensitive control electronics. This module also incorporates a \u003cstrong\u003evaristor (MOV)\u003c\/strong\u003e for additional over-voltage and over-current protection against adhesion of relay contacts.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eWide voltage range:\u003c\/strong\u003e Supports AC or DC 5V–400V inductive loads (up to 1000W)\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eDual protection:\u003c\/strong\u003e RC network absorbs inductive EMF; built-in varistor clamps excessive voltage spikes\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eEMI suppression:\u003c\/strong\u003e Reduces electromagnetic interference, improving microcontroller reliability\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eProtects relays \u0026amp; thyristors:\u003c\/strong\u003e Prevents contact welding\/adhesion caused by surge currents\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eEasy wiring:\u003c\/strong\u003e Crimping (screw) terminals for fast, secure connections — no soldering required\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUltra-compact:\u003c\/strong\u003e 30 × 13 × 12 mm (1.18\" × 0.51\" × 0.47\") — fits into tight enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eALLOYSEED\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eAC\/DC 5V – 400V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaximum Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u0026lt; 1000W (inductive loads)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCircuit Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eRC Snubber + Varistor (MOV)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eTerminal Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eCrimping \/ Screw Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e30 × 13 × 12 mm \/ 1.18\" × 0.51\" × 0.47\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eEU LVD Compliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBelow 50V AC or 75V DC (low voltage directive)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e1 × RC Absorption Circuit Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRelay contact protection in home automation and industrial control systems\u003c\/li\u003e\n  \u003cli\u003eThyristor (SCR\/TRIAC) gate protection in motor drives and lighting dimmers\u003c\/li\u003e\n  \u003cli\u003eMicrocontroller output protection in Arduino, PLC, and Raspberry Pi projects\u003c\/li\u003e\n  \u003cli\u003eAC\/DC switching power supplies and solenoid valve control circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Also Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/22awg-glass-tube-fuse-holder-5x20mm-6x30mm-screw-type-10-pack\"\u003e10-Pack 22AWG Glass Tube Fuse Holder 5×20mm \u0026amp; 6×30mm Screw\u003c\/a\u003e — add circuit overcurrent protection alongside your snubber module\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/140w-usb-c-fast-charging-adapter-auto-power-off-overcharge-protection\"\u003e140W USB-C Fast Charger with Auto Power-Off Overcharge Protection\u003c\/a\u003e — another smart layer of electrical protection for your bench setup\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eExternal Reference\u003c\/h3\u003e\n\u003cp\u003eFor best practices on safely working with electrical and electronic circuits, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Slight color variations may occur due to monitor settings. Please allow ±1–3 mm measuring deviation due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does an RC snubber circuit module do for relay contacts?\u003c\/h4\u003e\n\u003cp\u003eA: When a relay switches an inductive load (such as a motor or solenoid), the collapsing magnetic field generates a high-voltage transient spike. The RC snubber circuit absorbs this spike, protecting the relay contacts from pitting, welding, or burning, and extending the operational life of the relay significantly.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can this snubber module be used with both AC and DC circuits?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The RC Absorption Circuit Module is compatible with both AC and DC inductive loads across a wide voltage range of 5V to 400V, making it versatile for a wide range of control and automation applications, provided the load does not exceed 1000W.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I wire the RC snubber module — do I need to solder it?\u003c\/h4\u003e\n\u003cp\u003eA: No soldering is required. The module features convenient crimping (screw) terminals. Simply connect the module in parallel with your switching device (relay contacts or thyristor). The screw terminals make installation quick, secure, and suitable even for beginners.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will this module help reduce EMI in my microcontroller projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. By suppressing the transient voltage spikes generated by inductive switching, the RC snubber significantly reduces electromagnetic interference (EMI) on your power and signal lines, improving the stability and reliability of microcontrollers such as Arduino, STM32, or PLCs connected in the same circuit.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does an RC snubber circuit module do for relay contacts?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"When a relay switches an inductive load (such as a motor or solenoid), the collapsing magnetic field generates a high-voltage transient spike. The RC snubber circuit absorbs this spike, protecting the relay contacts from pitting, welding, or burning, and extending the operational life of the relay significantly.\"}}, {\"@type\": \"Question\", \"name\": \"Can this snubber module be used with both AC and DC circuits?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The RC Absorption Circuit Module is compatible with both AC and DC inductive loads across a wide voltage range of 5V to 400V, making it versatile for a wide range of control and automation applications, provided the load does not exceed 1000W.\"}}, {\"@type\": \"Question\", \"name\": \"How do I wire the RC snubber module — do I need to solder it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No soldering is required. The module features convenient crimping (screw) terminals. Simply connect the module in parallel with your switching device (relay contacts or thyristor). The screw terminals make installation quick, secure, and suitable even for beginners.\"}}, {\"@type\": \"Question\", \"name\": \"Will this module help reduce EMI in my microcontroller projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. By suppressing the transient voltage spikes generated by inductive switching, the RC snubber significantly reduces electromagnetic interference (EMI) on your power and signal lines, improving the stability and reliability of microcontrollers such as Arduino, STM32, or PLCs connected in the same circuit.\"}}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"United States","offer_id":47710900945001,"sku":"200007763:201336106","price":20.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S209bf95b2a3c455eadcf1a039ac97350R.webp?v=1782062714","url":"https:\/\/oasis-select.com\/products\/rc-snubber-circuit-module-relay-contact-protection-5v-400v","provider":"Oasis Select","version":"1.0","type":"link"}