Ametherm NTC Thermistor SL22 5R012 5Ω Radial Leaded

Description

Product Overview

Designed for precise temperature control, the Ametherm SL22 5R012 NTC thermistor offers a stable 5 Ω resistance and a ±15 % tolerance in a compact radial leaded package. Its durable construction and low dissipation constant make it ideal for industrial circuit protection, HVAC systems, and electronic monitoring devices. Easily replaceable and reliable, it ensures consistent performance in demanding environments.
The Ametherm SL22 5R012 NTC thermistor is engineered to deliver precise temperature sensing with a nominal resistance of 5 Ω at 25 °C and a tolerance range of –15 % to +15 %. Housed in a compact radial leaded package measuring 3 × 0.75 × 0.2 inches and weighing only 1.5 ounces, the device fits easily into tight board spaces while maintaining robust electrical performance. Constructed from high‑quality ceramic material, the thermistor offers excellent stability over a wide temperature range, ensuring consistent resistance values even under fluctuating thermal conditions. The radial leaded design provides straightforward soldering and reliable connection to PCB traces, reducing assembly time and minimizing the risk of mechanical stress. With a dissipation constant of 32 mW/°C, the component can safely handle transient power spikes without degrading its accuracy, making it suitable for both static and dynamic measurement scenarios. Ametherm’s rigorous testing procedures guarantee that each unit meets industry standards for reliability and longevity, positioning the SL22 5R012 as a trusted choice for demanding industrial applications.
The SL22 5R012 is accompanied by a comprehensive datasheet that details its resistance‑temperature characteristics, allowing engineers to perform precise curve fitting for simulation and design verification. The document includes B‑parameter values, standard test curves, and recommended mounting guidelines, which simplify the integration process for both new designs and retrofits. Additionally, the thermistor complies with RoHS and REACH regulations, ensuring that it can be used in environmentally conscious products without additional certification hurdles. Its lead finish is tin‑plated, providing excellent solderability and resistance to oxidation during storage and assembly. For quality assurance, each batch is traceable through a unique lot code, enabling quick identification in case of field failures or warranty claims. Rigorous burn‑in testing at elevated temperatures validates long‑term stability, and statistical analysis confirms that the part meets the specified tolerance across the full operating range, giving designers confidence in its performance under demanding conditions.
Reliability testing for the SL22 5R012 includes accelerated life testing, humidity soak, and thermal cycling to verify its endurance under extreme conditions. The thermistor has demonstrated a mean time between failures (MTBF) exceeding 10 years when operated within its specified temperature range, making it a dependable component for long‑life industrial equipment. It also meets IEC 60747‑3‑1 standards for thermistor characteristics, providing confidence to engineers who require compliance with international specifications. The combination of rigorous testing, adherence to standards, and traceable manufacturing processes ensures that each unit delivers consistent performance throughout its service life.

Usage

In practical deployments, the SL22 5R012 NTC thermistor serves as a key element in temperature‑sensing networks across a variety of industrial environments. Its 5 Ω nominal resistance makes it an excellent candidate for voltage divider circuits that feed analog‑to‑digital converters in microcontroller‑based monitoring systems. Engineers frequently embed the device in motor windings, power supplies, and battery packs to detect early signs of overheating, enabling protective shutdowns before damage occurs. The thermistor’s ±15 % tolerance provides sufficient accuracy for applications where absolute temperature precision is less critical than reliable trend detection, such as in HVAC control loops, refrigeration units, and process‑control instrumentation. Because the component can operate reliably from –40 °C to +125 °C, it tolerates the wide temperature swings encountered in outdoor installations, factory floors, and automotive under‑hood locations. Its compact size and low profile also allow it to be mounted on densely populated printed‑circuit boards without obstructing other components, preserving valuable board real‑estate in space‑constrained designs.
When integrating the SL22 5R012 into a system, proper handling and mounting techniques are essential to preserve its performance characteristics. The radial leads should be bent to a 90‑degree angle using a precision bending tool to avoid stressing the ceramic body, and the leads must be soldered to a clean, tin‑plated pad to ensure a low‑resistance joint. It is advisable to store the thermistors in an anti‑static bag and keep them away from moisture‑rich environments before installation, as prolonged exposure to humidity can affect the ceramic matrix. During operation, the device should be positioned away from high‑current conductors that could generate electromagnetic interference, which might introduce measurement noise. For applications requiring rapid thermal response, mounting the thermistor directly onto a metal substrate using thermal paste can improve heat transfer, while still maintaining electrical isolation through the leads. Following these best‑practice guidelines helps achieve the full accuracy and longevity promised by Ametherm’s design.
When deploying the thermistor in harsh industrial settings, it is important to consider the surrounding thermal mass and airflow to achieve accurate readings. Installing the device on a metal heat sink or using a thermally conductive adhesive can improve the response time, while still preserving electrical isolation. In applications such as power inverters or motor drives, the thermistor can be positioned near heat‑generating components to monitor real‑time temperature spikes, allowing the control firmware to adjust duty cycles and prevent thermal runaway. For outdoor installations, protective coatings or conformal sealants can be applied to shield the component from moisture, dust, and corrosive chemicals, extending its service life. Proper cable routing and shielding also help minimize electromagnetic interference that could otherwise distort the thermistor’s signal. Prior to final deployment, a calibration routine using a reference thermometer can verify the thermistor’s accuracy within the expected operating range, ensuring reliable performance throughout the product’s lifecycle.

Why Choose Us

Ametherm has built a reputation for delivering high‑quality passive components that meet the rigorous demands of industrial and scientific markets. The company’s manufacturing facilities employ state‑of‑the‑art sintering ovens and automated inspection systems, ensuring that each thermistor exhibits consistent electrical parameters and physical dimensions. Quality control is reinforced by statistical process control (SPC) methods, which detect any deviation from target specifications early in the production line, allowing corrective actions before the parts leave the factory. This commitment to precision translates into a product that engineers can trust for critical temperature monitoring tasks, reducing the risk of unexpected failures in safety‑critical systems. Moreover, Ametherm’s extensive experience in thermistor technology enables them to provide detailed application notes and design support, helping customers accelerate time‑to‑market while maintaining high reliability standards.
In addition to the robust construction of the SL22 5R012, Ametherm offers comprehensive after‑sales support that includes technical assistance, warranty coverage, and rapid replacement options. Customers can contact the dedicated support team via phone or email to receive guidance on circuit integration, thermal modeling, and troubleshooting any anomalies observed during field operation. The standard one‑year limited warranty covers manufacturing defects, providing peace of mind for projects with long deployment cycles. For bulk purchasers, Ametherm can arrange inventory stocking and just‑in‑time delivery, minimizing lead times and ensuring that production lines remain uninterrupted. This blend of product excellence and responsive service creates a partnership that extends beyond the point of sale, fostering confidence among designers and end‑users alike.
Ametherm’s commitment to continuous improvement is reflected in its investment in research and development, where new ceramic formulations and miniaturization techniques are explored to meet evolving market demands. The company collaborates closely with major OEMs to tailor thermistor specifications, offering custom tolerance levels or extended temperature ranges when required. This collaborative approach ensures that customers receive components that are not only technically superior but also aligned with their product roadmaps. Moreover, Ametherm maintains a global distribution network, providing fast shipping to major industrial hubs across North America, Europe, and Asia, reducing lead times for critical projects. The combination of innovative engineering, responsive support, and worldwide logistics makes Ametherm a preferred partner for high‑performance temperature sensing solutions. Customers also benefit from a proactive reliability program, where field data is collected and analyzed to drive future product enhancements, reinforcing Ametherm’s position as a leader in thermistor technology.

Key Features

• Precise 5 Ω resistance at 25 °C provides accurate temperature monitoring, enabling reliable control loops in industrial automation, motor protection, and HVAC applications, while maintaining low power consumption for efficient circuit design.
• ±15 % tolerance offers a balanced trade‑off between cost and performance, making the thermistor suitable for a wide range of temperature‑sensing needs without sacrificing reliability, and it fits standard design tolerances for most control systems.
• Radial leaded design simplifies PCB mounting, provides a sturdy mechanical connection, and ensures long‑term durability even in high‑vibration industrial environments, reducing assembly time and minimizing the risk of lead breakage.
• Compact 3 × 0.75 × 0.2 in dimensions allow integration into tight board spaces, preserving valuable real‑estate while delivering high‑performance temperature sensing, ideal for space‑constrained electronic modules.
• Ametherm provides dedicated technical support and a one‑year warranty, ensuring reliable after‑sales service, quick assistance for integration challenges, and confidence in long‑term product performance.

FAQ

What temperature range can the SL22 5R012 operate in?

The SL22 5R012 NTC thermistor is rated for continuous operation from –40 °C up to +125 °C. This wide range covers most industrial, automotive, and HVAC environments, allowing the part to function reliably in both cold‑start applications and high‑temperature zones without performance degradation. The device maintains its specified resistance tolerance throughout this span, and its ceramic composition resists moisture absorption, ensuring stable readings even under harsh conditions. For applications that require occasional exposure to temperatures beyond the nominal range, the thermistor can tolerate short‑term spikes without permanent damage, provided that the spikes are within the specified overload limits.

How do I mount the thermistor on a PCB?

Mounting the SL22 5R012 is straightforward thanks to its radial leaded configuration. First, bend the leads to a 90‑degree angle using a precision bending tool, taking care not to stress the ceramic body. Place the component on a clean, tin‑plated pad and apply a small amount of solder paste before reflowing. Ensure the solder joint is smooth and free of bridges to maintain a low‑resistance connection. For added mechanical strength, a small amount of epoxy can be applied after soldering, especially in high‑vibration environments.

Can the thermistor be used for motor protection?

Yes, the SL22 5R012 is well suited for motor protection circuits. Its rapid thermal response and stable resistance curve allow it to detect temperature rises in motor windings quickly. By placing the thermistor in series with a sensing resistor, the voltage drop can be monitored by a microcontroller or dedicated protection IC. When the temperature exceeds a predefined threshold, the system can trigger a shutdown or reduce load, preventing overheating and extending motor life.

What warranty and support does Ametherm provide?

Ametherm offers a one‑year limited warranty covering any manufacturing defects for the SL22 5R012. In addition, customers have access to technical support via phone or email, where engineers can assist with design integration, thermal modeling, and troubleshooting. For bulk orders, Ametherm can arrange inventory stocking and just‑in‑time delivery to keep production lines running smoothly.

How can I calculate temperature from the thermistor resistance?

The temperature can be derived using the Steinhart‑Hart equation, which relates resistance to temperature through three coefficients supplied in the datasheet. By inserting the measured resistance value into the equation, the resulting temperature in Kelvin can be converted to Celsius. Many design tools and microcontroller libraries include built‑in functions for this calculation, simplifying implementation in firmware.

What is the dissipation constant and why does it matter?

The dissipation constant, expressed in milliwatts per degree Celsius, indicates how much power the thermistor can safely dissipate without self‑heating affecting its resistance reading. A higher constant, such as the 32 mW/°C rating of the SL22 5R012, allows the device to handle transient power spikes while maintaining accurate temperature measurement, which is essential in dynamic applications like motor control.

Choosing the Ametherm SL22 5R012 NTC thermistor ensures reliable temperature monitoring, easy integration, and long‑term support for a wide range of industrial applications.

Its proven performance and comprehensive documentation make it a trusted component for engineers seeking precision and durability.