OHMITE 189399 Printed Circuit Board Pcb Regulator LC-36 LM7915CT

( Brand: Ohmite ), ( Manufacturer Part Number: 189399 ), ( Part Type: Circuit Board Regulator ), ( Mounting Style: Pcb Mount ), ( Material: Fr-4 ), ( Pcb Type: Double-sided Pcb ), ( Item Height: 19 Mm ), ( Item Length: 114.3 Mm ), ( Item Width: 64 Mm ), ( Unit Type: Unit )

Review OHMITE Printed Circuit Board Pcb Assembly Regulator

The **OHMITE 189399 LC-36 Printed Circuit Board (PCB) LM7915CT Voltage Regulator** is a precision-engineered, high-performance power regulation module designed for applications requiring stable, low-dropout, and reliable voltage output. This compact yet robust solution integrates the renowned **LM7915CT**, a 5-ampere, fixed-voltage, three-terminal negative voltage regulator, onto a meticulously designed PCB, offering an all-in-one solution for voltage regulation needs. The LM7915CT itself is a member of the LM79xx series, a well-established family of negative voltage regulators known for their exceptional thermal stability, low noise, and high efficiency, making it ideal for a wide range of industrial, automotive, and consumer electronics applications. The PCB is constructed with high-quality materials, ensuring durability and resistance to environmental stressors such as vibration, moisture, and temperature fluctuations, which is critical for applications deployed in harsh operating conditions.

The **LC-36** mounting style of this PCB provides a secure and versatile installation option, allowing for easy integration into existing circuit designs or standalone use. The regulator s output voltage is fixed at **-15 volts**, with a typical dropout voltage of just **2.5 volts**, ensuring minimal power loss and efficient operation even when the input voltage is only slightly higher than the desired output. This feature is particularly advantageous in battery-powered or low-voltage systems where energy conservation is paramount. The LM7915CT is equipped with built-in thermal shutdown protection, automatically halting operation if the junction temperature exceeds safe limits, thereby preventing catastrophic failure and extending the lifespan of both the regulator and the connected circuitry. Additionally, the regulator s **current limiting** feature safeguards against overload conditions, providing an extra layer of protection for downstream components.

The PCB itself is designed with precision, featuring well-defined solder pads and clear silkscreen markings for accurate and efficient assembly. The layout minimizes parasitic capacitance and inductance, reducing noise and improving overall performance. The **LC-36** footprint is optimized for surface-mount technology (SMT), allowing for automated assembly processes that enhance production efficiency and reliability. Whether used in power supply units, signal conditioning circuits, or as a drop-in replacement for aging regulators, this module delivers consistent and dependable performance. Its compact form factor and robust construction make it a versatile choice for engineers seeking a reliable, off-the-shelf solution without compromising on quality or functionality. Ideal for both prototyping and mass production, the **OHMITE 189399 LC-36 PCB LM7915CT Voltage Regulator** exemplifies the blend of simplicity and sophistication in power management components.

**Pros and Cons of buying a Ohmite 189399 LC-36 Printed Circuit Board (PCB) LM7915CT Regulator**

### **Pros**

1. **Reliability and Quality** Ohmite is a well-established manufacturer known for producing high-quality power components, including voltage regulators. The LM7915CT is a widely trusted linear regulator, and the PCB integration ensures better stability and performance compared to discrete components.

2. **Compact and Efficient Design** The LC-36 PCB format provides a space-saving solution, making it ideal for applications where board real estate is limited. The integrated design reduces the need for additional passive components, simplifying assembly and reducing potential failure points.

3. **Precise Voltage Regulation** The LM7915CT is a 15V fixed-voltage regulator with good line and load regulation, ensuring stable output even under varying input conditions. This makes it suitable for sensitive circuits requiring consistent power delivery.

4. **Low Noise and Ripple** Linear regulators like the LM7915CT inherently provide low output noise and ripple, which is beneficial for analog circuits, audio applications, or any system where clean power is critical.

5. **Easy Integration** Since the regulator is already mounted on a PCB, it can be directly soldered into a larger circuit without requiring additional mounting or heat sinking (though external heat sinking may still be needed for high-current applications). This simplifies PCB design and reduces assembly time.

6. **Wide Input Voltage Range** The LM7915CT typically operates with input voltages between 17V and 35V, offering flexibility in power supply selection for various applications.

7. **Cost-Effective for Small Quantities** While bulk purchases may offer better pricing, buying a single unit or small quantity can still be cost-effective compared to assembling a discrete regulator circuit from individual components.

8. **Compatibility with Existing Circuits** The LM7915CT is a standard regulator, meaning it can be easily integrated into existing designs without requiring major modifications.

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### **Cons**

1. **Limited Current Handling** The LM7915CT is designed for relatively low current applications (typically up to 1A, depending on heat dissipation). For high-current requirements, a more powerful regulator (such as a switching regulator or a higher-current linear regulator) would be necessary.

2. **Heat Dissipation Requirements** Even at moderate currents, the LM7915CT can generate heat, especially if the input-output voltage difference is large. Without adequate heat sinking, the regulator may overheat, reducing lifespan or causing failure. This may require additional passive cooling components.

3. **Inefficiency at High Dropout Voltages** Linear regulators waste power as heat when the input-output voltage difference is large (e.g., a 30V input for a 15V output). This can lead to inefficiency and increased cooling needs, making them less suitable for applications where power dissipation is a concern.

4. **No Adjustable Output Voltage** Unlike adjustable regulators (e.g., LM317), the LM7915CT provides a fixed 15V output. If a different voltage is needed, an alternative regulator or additional circuitry (such as a voltage divider and feedback loop) would be required.

5. **Limited Availability and Lead Times** Depending on the supplier, Ohmite or specific PCB-mounted regulators may have limited stock or longer lead times compared to generic ICs. This could delay projects if the component is not readily available.

6. **Potential for Higher Cost per Unit** While cost-effective for small quantities, the price per unit for a PCB-mounted regulator may be higher than assembling a discrete version from individual components (e.g., LM7915CT IC PCB traces passive components). For large-scale production, bulk purchasing of discrete parts could be more economical.

7. **No Built-in Protection Features** The LM7915CT lacks advanced protection features such as short-circuit protection, thermal shutdown, or current limiting (though basic thermal protection may be present). Additional circuitry may be needed for robust protection in demanding applications.

8. **Compatibility with Modern Designs** In some cases, modern designs may favor switching regulators (e.g., buck converters) for their higher efficiency, especially in battery-powered or portable applications. A linear regulator like this may not be the optimal choice for such scenarios.

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### **Conclusion**

The Ohmite 189399 LC-36 PCB-mounted LM7915CT regulator is a practical choice for applications requiring a **stable, low-noise, fixed 15V output** with **simplified assembly** and **compact form factor**. It excels in scenarios where:

- The current draw is moderate (under 1A).

- Space constraints make discrete assembly impractical.

- A reliable, off-the-shelf solution is preferred over custom designs.

- The input voltage is sufficiently high (e.g., 17V 35V) to avoid excessive heat dissipation.

- High-current applications (where switching regulators or higher-power linear regulators are needed).

- Efficiency-critical designs (due to power dissipation as heat).

- Adjustable voltage requirements (where an LM317 or similar would be better).

- Projects with tight lead times or limited budget for single-unit purchases.

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### **Recommendation**

- Your application demands a **fixed 15V output** with minimal noise and ripple.

- You prioritize **ease of integration** and **space savings** over maximum efficiency.

- The current load is **under 1A**, and you can manage heat dissipation (e.g., with a small heat sink or proper airflow).

- You value **reliability and brand reputation** (Ohmite) over cost savings from discrete assembly.

- You need **higher current** (e.g., >1A) or **adjustable voltage** (e.g., LM317, switching regulators).

- Efficiency is critical (e.g., battery-powered devices), in which case a **buck converter** (e.g., LM2596) may be better.

- You are purchasing in bulk, as **discrete LM7915CT ICs PCB traces** could be more cost-effective.

- Your design requires **advanced protection features** (e.g., thermal shutdown, current limiting), which may need to be added externally.

For most **low-to-moderate current, fixed-voltage, analog-sensitive circuits**, the Ohmite PCB-mounted LM7915CT is a solid and convenient option. Always verify the regulator s datasheet for your specific input/output conditions and ensure proper heat management to maximize its lifespan.

Details:

LC-36 printed circuit board PCB assembly 189399 featuring two LM7915CT metal-tab regulator packages, electrolytic capacitors, multiple resistors including Ohmite power resistors, Leds and through-hole connectors mounted on a rigid double-sided.

part #: 189399 price

• $68.42

specifications pcbemdev:

• brand: Ohmite
• mpn: 189399
• part type: Circuit Board Regulator
• mounting style: Pcb Mount
• material: Fr-4
• pcb type: Double-sided Pcb
• item height: 19 Mm
• item length: 114.3 Mm
• item width: 64 Mm
• unit type: Unit

offer pcbemdev:

• availability: In Stock
• options: Ship-to-home
• quantity: 2
• started: April 22, 2026
• sold: 0
• best offers: True

general pcbemdev:

• condition: Used
• Electronic Components Semiconductors > Circuit Boards Prototyping > Printed Circuit Boards PCBs

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• # reviews: 547
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