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  6. Thermal Jumper Chip "TMJC"

Thermal Jumper Chip "TMJC"

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TMJC

last updated:Sep 28, 2026

AKAHANE ELECTRONICS CORPORATION
AKAHANE ELECTRONICS CORPORATION
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Electricity is insulated, only heat escapes! Smartly breaking through heat buildup in high-density substrates.

We respond to the needs of 'unable to eliminate localized heat buildup (hotspots) in high-density implementation of power electronics and high-frequency circuits' and 'wanting to create a heat dissipation path while maintaining electrical insulation for circuits that cannot be grounded.' With the recent miniaturization and high power output of devices, the difficulty of thermal design has risen sharply. Our product is currently attracting significant attention from many developers working on such 'next-generation designs,' leading to a rapid increase in inquiries. 【This product features】 • Complete electrical insulation with powerful thermal bypass: It uses aluminum nitride (AlN) substrate, boasting a high thermal conductivity of 170 W/m·K. As an electrically insulated thermal conductor, it exhibits excellent thermal conductance of up to 250 mW/°C. • Low capacitance for high-frequency reliability: The capacitance is extremely low, ranging from just 0.07 pF to 0.26 pF, ensuring that it does not compromise the characteristics of RF amplifiers and communication devices. It eliminates the need for large heat sinks or expensive multilayer heat dissipation substrates, strongly supporting the standardization of designs with a single solution through SMD (surface mount technology).

    Resistors
サーマルジャンパーチップ 『TMJC』.jpg

Thermal Jumper Chip "TMJC"

サーマルジャンパーチップ 『TMJC』.jpg
サーマルジャンパーチップ 『TMJC』.jpg
  • Related Link - https://www.akaneohm.com/products-data/tmjc/

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basic information

Specifications / Specs - Excellent thermal conductivity: Uses aluminum nitride (AlN) substrate with a thermal conductivity of 170 W/m·K to efficiently dissipate heat from heat-generating components. - Reliable insulation: A thermally conductive material that is electrically insulated, ensuring high insulation resistance (1.5 kVAC, RMS to 5.0 kVAC, RMS). - Low capacitance that does not affect the circuit: Low capacitance design with a maximum capacitance of 0.26 pF. - Environmental standards: RoHS compliant product.

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Applications/Examples of results

Applications / Achievements Power Supply and Power Conversion Equipment - Switching Power Supplies (High Efficiency Power Systems) - Various Converters (e.g., DC/DC Converters) - Various Power Modules for Inverter Circuits Surrounding Areas: Optics, Communication, and High-Frequency Fields - Laser Diode Surroundings (Circuits requiring precise temperature control and low capacitance) - Local heat dissipation on high-density printed circuit boards for RF amplification circuits and communication devices.

News about this product(1)

【Product Page Renewal】'TMJC', which contributes to thermal management of power semiconductors and high-frequency circuits, significantly expands the necessary thermal resistance and specific application examples for evaluation and selection!

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Thank you for always viewing our product information. We have renewed the product information for the aluminum nitride substrate thermal jumper chip "TMJC Series," which addresses the issue of "localized heating (hot spots)" around power semiconductors and optical devices on circuit boards. To facilitate smooth design considerations and product selection for our customers, we have newly expanded and published specific thermal and electrical characteristic data, such as high thermal conductivity (170W/m·K), electrical insulation with breakdown voltage (1.5k–5.0kVAC), and low capacitance (0.07–0.26pF) that does not affect high-frequency circuits. We also cover detailed specifications for all six sizes, including long edge electrodes that further reduce thermal resistance, as well as "specific thermal countermeasures and application examples" for power equipment, high-power amplifiers, and automotive ECUs. ■ Key points of this renewal: • Excellent thermal conductivity: High heat dissipation effect with aluminum nitride substrate of 170W/m·K • Reliable electrical insulation: Stability that meets insulation breakdown voltage and low capacitance characteristics • Rich size variations: All six sizes including long edge electrode specifications that further reduce thermal resistance • Application images: Examples of thermal countermeasures for power modules, laser diodes, automotive ECUs, etc.

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Company information

AKAHANE

AKAHANE ELECTRONICS CORPORATION

Electronic Components and Semiconductors

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Our company has developed as a specialized manufacturer of electronic parts, specifically resistors, in an environment overlooking the Central and Southern Alps. Since our establishment in 1960, we have upheld the management philosophy of "creating reliable, high-quality, valuable products to contribute to society," and based on our extensive experience and achievements, we manufacture and sell numerous excellent products: resistors. In the rapidly evolving electrical and electronics industry, we strive for continuous research and development, equipped with both "speed and flexibility" to adapt to the changing times.

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