TO-822

The TO-822 header is an enlarged modification of the TO-8 header, designed to address applications where the standard TO-8 header’s mounting area is insufficient. These headers commonly use Kovar or CRS for their bases and pins, coated with nickel and gold. KIMT offers thermoelectric sub-assemblies on TO-822 headers with options for 12 or 14 pins. Its mounting surface is typically 12.0×12.0 mm, compatible with a wide range of thermoelectric coolers (TECs). KIMT offers various solutions including both single-stage and multi-stage TECs. The TO-822 header is also a good fit for pyramidal multi-stage TECs, especially three and four-stage designs, where the bottom (hot side) ceramic is typically larger than the top.

Key features

• Medium Size: Compact yet accommodates various components.
• Hermetic Seal: Ensures reliability in harsh environments.
• Metal Construction (Kovar/СRS): Durable and offers excellent heat dissipation.
• Multiple Pins: For power, signal and control.
• Optical Window/Lens (Glass/Ceramic): Enables optical transmission while maintaining hermeticity.
• Improved Thermal Management: Larger size facilitates better heat dissipation.
• Versatile Integration: Accommodates various optoelectronic components and additional features (e.g., TECs, sensors).

Applications

• Moderate- and high-power laser diodes used in laser-based sensors, barcode scanners, optical communication systems and medical laser treatments.
• Photodiodes used in optical detection systems, including industrial sensors and spectroscopy devices.
• High-power or medium-power LEDs used in optical sensing, medical equipment and high-intensity lighting.