| Quantity: | |
|---|---|
Center Space | 3.50mm |
Rated Current | 300V,10A |
Surge Voltage | 4000V |
Insulation Body | PA66,UL94,V - 0 |
Terminal Body | BRASS |
PCB Diameter | φ1.3mm |
Temperature | -40℃～105℃ |
FH 1.5-3.50-00V-XX Product Diagram
CMH-1-5-XX-3-50-00V is a high-performance through-hole metal film resistor from the CMH series, specifically designed for stable electrical performance in precision circuits. It features a 1.5W power rating (at 70°C, derating linearly above 70°C) and a maximum working voltage of 50V DC, making it suitable for low to medium power applications. The resistor has an epoxy-coated cylindrical body (gray color, UL 94 V-0 flammability rating) that provides excellent insulation and corrosion resistance, while the leads are made of tinned copper (tin thickness: 1.0μm) for easy soldering and long-term reliability. Its all-welded construction (resistor element welded to leads) eliminates loose connections, ensuring consistent performance in high-precision circuits such as those in medical devices and industrial controls.
Precision Performance: Utilizes a metal film resistor element with tight tolerance control (standard ±1%, ±2%, ±5%; ±0.1% available for ultra-precision applications) and a low temperature coefficient of resistance (TCR) of ±100ppm/°C (from -55°C to 155°C). This ensures minimal resistance drift with temperature changes, critical for circuits requiring stable signal conditioning.
Durable Build for Longevity: The epoxy coating resists moisture (relative humidity: 95% at 40°C for 1000 hours), chemicals (e.g., solvents, oils), and mechanical damage (scratching, impact). The tinned copper leads have a tensile strength of 5N, preventing lead breakage during PCB assembly.
Easy Integration into PCBs: The through-hole design (lead diameter: 0.5mm, lead length: 2.5mm) is compatible with automated insertion and wave soldering processes, reducing production time for high-volume manufacturing. It has a lead pitch of 5mm, fitting standard PCB footprints for 1.5W resistors.
Wide Operating Temperature Range: Functions reliably from -55°C (suitable for aerospace or cold storage applications) to 155°C (ideal for industrial ovens or power supplies), with no performance degradation within this range. It also has a high surge voltage resistance (1.5x rated voltage for 5 seconds) to withstand temporary voltage spikes.
Consumer electronics: Used in TVs (signal conditioning circuits), smartphones (charging current regulation), tablets, and power adapters (voltage division circuits).
Industrial control systems: Suitable for PLC modules (current sensing), motor drives (speed control circuits), and power supplies (voltage regulation).
Medical equipment: Applied in blood glucose meters (precision signal amplification), ultrasound machines (current limiting), and patient monitors (stable voltage references) due to its low TCR and high precision.
Automotive electronics: Used in in-vehicle infotainment systems (audio circuit filtering) and dashboard instruments (sensor signal conditioning), operating within the -40°C to 85°C automotive temperature range.
Q: What is the power rating, and how does it derate at high temperatures?
A: The standard power rating is 1.5W at 70°C. Above 70°C, the power rating derates linearly—for example, at 100°C, the rating is 1.0W; at 155°C, it is 0W. Ensure the resistor operates below its derated power in high-temperature environments.
Q: Is it RoHS compliant, and does it contain any hazardous substances?
A: Yes, it is fully RoHS 2.0 compliant, with no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBs), or polybrominated diphenyl ethers (PBDEs). The tin plating on the leads is lead-free (≤1000ppm lead).
Q: Can it be used in high-temperature applications like industrial ovens?
A: Yes, it operates up to 155°C, making it suitable for industrial ovens, power supplies, and other high-temperature equipment. For applications above 155°C, consider our CMH-1-5-XX-3-50-01V model with a 200°C maximum temperature.
Q: Is it suitable for high-frequency circuits (e.g., RF applications)?
A: It has a low parasitic inductance (≤5nH) and capacitance (≤0.5pF), making it suitable for low to medium frequency circuits (up to 100MHz). For high-frequency RF applications (above 1GHz), we recommend our surface-mount metal film resistors with lower parasitic parameters.
