Contents
What is a pulse withstanding resistor?
Pulse withstanding chip resistors are designed to maximize the usable width of the resistive element. This design greatly reduces or completely eliminates the hot spot on the resistor where current crowding occurs. That is the principle weak point and main limiting factor in the pulse handling for chip resistors.
How do I choose the right resistor value?
Resistor selection requires three steps:
- Determine the resistance and the watts to be dissipated by the resistor.
- Determine the proper “Watt Size” (physical size) as controlled by watts, volts, permissible temperatures, mounting conditions and circuit conditions.
Why do pulse resistors have a high pulse rating?
Our pulse rating assumes the pulse is of short duration and all the energy is going into the resistance wire, and doesn’t take into account energy dissipated into the rest of the resistor. For longer pulses, heat is transferred to the surrounding materials, so the energy absorbed can be much higher than the value given.
What kind of resistors can handle a 10kV pulse?
Stackpole’s axial leaded resistors have options which can handle pulse voltages up to 10KV, pulse power up to 80KW, and pulse energy up to 500J. Stackpole’s surface mount resistors have products that can handle pulse voltages up to 40KV, pulse power up to 4400W, and pulse energy up to 50J.
How are pulse handling resistors used in RPC?
Pulse Power Withstanding Chip Resistors – RPC RPC is designed specifically to withstand pulse current and pulse power events by limiting the laser trimming allowed for calibration. Current crowding occurs where the resistor is trimmed which creates a hot spot and limits the amount of pulse power the part can withstand.
How to choose the right resistor for your circuit?
How do I Choose the Right Resistor? 1 Step 1 – Calculating Your Resistance. This is where you will use Ohm’s Law to calculate your resistance. You can use one of the standard formulas 2 Step 2 – Calculating Your Power Rating. 3 Step 3 – Choosing a Resistor.