Varistor — Model 14D431K (carbon composition) — Resistance Tolerance: 430V Key benefits Protects sensitive electronics from voltage spikes and transient surges by clamping excess voltage to safer levels. Carbon composition construction offers stable surge suppression behavior suitable for general-purpose protection tasks. A dedicated 430V resistance tolerance makes this varistor appropriate for applications where transients can reach mid-hundreds of volts, helping reduce component failures and downtime. What it does and why you need it Function: acts as a nonlinear resistor that conducts when voltage exceeds its tolerance, diverting surge current away from protected components. Problem solved: prevents overvoltage damage from lightning-induced spikes, switching transients, and accidental surges that can destroy semiconductors, power supplies, and control electronics. Standout point: combines the familiar 14D model identification (14D431K) with carbon composition technology and a 430V tolerance for dependable, general-purpose surge protection. Important attributes Type: Varistor Model Number: 14D431K Resistance Tolerance: 430V (specified tolerance for transient clamping) Technology / Material: carbon composition Compatibility: designed for circuits and assemblies that specify a 14D-series varistor with a 430V tolerance; check system voltage and energy needs before selection. Performance: provides transient suppression at and above its specified tolerance, reducing peak voltages seen by downstream components. Typical applications / use scenarios Power supply protection: installed across AC or DC input lines to protect SMPS and transformers from short-duration voltage spikes. Motor and appliance protection: used on motor controllers or household appliances to absorb switching transients and extend component life. Industrial control and automation: integrated into control panels and PLC inputs to guard sensitive electronics from inductive switching and line disturbances. Practical notes for selection and installation Confirm that a 430V tolerance matches the maximum continuous and transient voltages in your system. Ensure the varistor’s energy absorption capability and mounting style are suitable for your application (consult circuit specifications for surge current and energy requirements). Use appropriate safety practices when replacing or installing varistors; they are sacrificial components designed to absorb harmful transients. Specifications summary Type: Varistor Model Number: 14D431K Resistance Tolerance: 430V Technology: carbon composition Reliable, model-specific protection for equipment that requires a 14D-series varistor with a 430V tolerance and carbon composition technology.