CPR15R2000JE10

FAQFrequently Asked Questions

• Can the CPR15R2000JE10 handle inrush current spikes in a power supply circuit without degrading? The CPR15R2000JE10 is a 15W wirewound resistor rated for continuous operation up to 275°C. While its thermal mass and construction allow it to absorb transient energy, sustained inrush currents exceeding the resistor's power dissipation envelope will cause thermal runaway. For inrush limiting, verify that the peak power during transient events remains within the 15W rating and that thermal time constants allow cooling between pulses. The CPR15R2000JE10's 200 mOhm resistance should be paired with circuit analysis to confirm the impedance provides adequate current limiting without sustained overstress.
• What design trade-offs should I consider when replacing a film capacitor discharge resistor with the CPR15R2000JE10? The CPR15R2000JE10 offers wirewound construction with tight tolerance (±5%) and a wide operating range (-65°C to 275°C), making it suitable for discharge applications where precision and thermal stability matter. However, wirewound resistors exhibit higher inductance than film or metal-film alternatives, which can introduce ringing in fast transient circuits. For capacitor discharge in sensitive analog or switching circuits, verify that the CPR15R2000JE10's parasitic inductance does not interfere with your discharge time constant or introduce EMI. The 200 mOhm resistance is well-suited to high-energy discharge paths where heating is expected.
• Is the CPR15R2000JE10 suitable for shunt measurement in battery management systems? The CPR15R2000JE10 can function as a shunt resistor for current sensing, with 200 mOhms providing a 0.2V drop at 1A. The ±5% tolerance means your measurement accuracy depends on calibration or trimming unless tighter tolerance is required by your system specification. The temperature coefficient of ±400 ppm/°C will shift resistance with thermal cycling; over a 100°C temperature swing, expect approximately ±0.04 Ohm drift. For battery management applications requiring high precision and stability, consider whether this temperature drift is acceptable or whether a precision thin-film shunt resistor with lower temperature coefficient (typically ±25 to ±100 ppm/°C) would better serve your accuracy budget.
• Can the CPR15R2000JE10 be used in continuous high-temperature industrial environments near its 275°C upper limit? The CPR15R2000JE10 is rated for operation to 275°C and features flame-proof, safety-approved construction suitable for harsh industrial settings. However, continuous operation at or near the upper temperature limit reduces the effective power rating and accelerates aging in wirewound resistors. Thermal cycling between -65°C and elevated temperatures stresses the radial lead terminations and can lead to mechanical fatigue and increased resistance drift over time. For long-term industrial deployment, operate the CPR15R2000JE10 with adequate thermal margin; if the ambient is near 275°C, the actual allowable power dissipation and expected component lifetime should be confirmed with Vishay Dale technical data or derating curves.
• How does the CPR15R2000JE10 compare to thin-film alternatives for precision current sensing applications? The CPR15R2000JE10 is a wirewound resistor with ±5% tolerance and ±400 ppm/°C temperature coefficient, offering robustness and high power handling at low cost. Thin-film shunt resistors typically provide ±1% or better tolerance and ±25 to ±100 ppm/°C temperature coefficients, delivering superior measurement stability and accuracy for precision current sensing. If your design requires <2% current measurement error over operating temperature, a thin-film alternative such as a Vishay WSL or Vishay WSLP series may be better suited. The CPR15R2000JE10 remains practical for applications where tolerance and thermal drift are non-critical or where high power dissipation and ruggedness are the primary concern.
• What precautions should be taken when soldering the CPR15R2000JE10 radial leads to avoid mechanical stress and open circuits? The CPR15R2000JE10 features radial lead terminations in a through-hole package (1.888" length, 0.500" width). During soldering, avoid flexing or bending the leads excessively, as wirewound resistors are more susceptible to lead fatigue than metal-film types. Use controlled temperature profiles and allow sufficient dwell time to ensure solder wetting. After assembly, avoid mechanical vibration or thermal cycling stress on the leads during the first 24 hours while solder joints stabilize. In high-vibration industrial environments, consider potting or mechanical strain relief to prevent lead fracture and intermittent open-circuit failures over the product lifetime.
• Is the CPR15R2000JE10 acceptable for use in circuits with DC/DC converter output filtering or does a lower inductance resistor meet the requirement better? The CPR15R2000JE10, as a wirewound component, exhibits parasitic inductance that can interact with switching transients in DC/DC converter applications. If the resistor is used in the output path or feedback network of a switching converter, its inductance may cause overshoot, ringing, or stability issues. For DC/DC converter circuits, verify the CPR15R2000JE10's frequency response and compare it to metal-film or thin-film alternatives with lower inductance. If transient response or EMI is a concern, a 0.2 Ohm metal-film or current-sense thin-film resistor may provide better performance; however, the CPR15R2000JE10 remains suitable for post-converter load or discharge applications where inductance is less critical.
• Can the CPR15R2000JE10 replace an older Vishay Dale or Ohmite low-ohm resistor in a legacy design without circuit re-qualification? The CPR15R2000JE10 is part of Vishay Dale's CPR series and is designed for direct replacement within that family. However, when considering alternatives from competing manufacturers (such as Ohmite, Caddock, or Stackpole), verify that the replacement matches in resistance (200 mOhm), power rating (15W), tolerance (±5%), temperature coefficient (±400 ppm/°C), and lead configuration (radial). Physical dimensions and thermal behavior may differ subtly; layout changes could affect thermal dissipation. For legacy designs, confirm that the alternative resistor's maximum operating temperature, inrush capability, and frequency response do not introduce new failure modes or derating in your application before proceeding without full re-qualification testing.
• What is the expected thermal behavior of the CPR15R2000JE10 in a confined PCB layout without external heat sinking? The CPR15R2000JE10 dissipates heat from its wirewound body and radial leads. In a confined layout without forced air or heat sinking, thermal resistance to the PCB is determined by lead contact area and copper plane design. For 15W continuous dissipation in still air, the CPR15R2000JE10 will reach elevated junction temperatures; if PCB copper is limited or the component is surrounded by other heat sources, internal temperature may exceed the mounting surface temperature significantly. Conduct thermal simulation or measurement to confirm that the resistor's junction remains below 275°C under maximum specified power and ambient conditions. If thermal margins are tight, consider routing thermal vias beneath the component or relocating it to an area with better air flow to maintain reliability.
• How does the MSL1 moisture sensitivity rating of the CPR15R2000JE10 affect handling and storage procedures? The CPR15R2000JE10 carries MSL (Moisture Sensitivity Level) 1, meaning it is insensitive to moisture absorption and does not require controlled dry-pack storage or bake-out procedures before soldering. This simplifies supply chain and warehouse management compared to higher MSL components. However, the radial lead terminations remain susceptible to corrosion if exposed to high humidity or condensation for extended periods. Store the CPR15R2000JE10 in a normal warehouse environment without special humidity control; upon receipt, inspect leads for oxidation or contamination. For applications in coastal or marine environments, apply conformal coating over the solder joints and leads to prevent galvanic corrosion and ensure long-term reliability.