"Strong Heating in Low Temps · No Degradation in High Temps — The Golden Duo for Commercial Heat Pumps"
The Panasonic SBN303/353/373 series is a versatile workhorse in the mid-range commercial market. Models with the D/H suffix feature a built-in EVI (Enhanced Vapor Injection) port, enabling strong heating in low temperatures without the need for external auxiliary equipment — delivering over 20% more heating capacity than standard models at -15°C, making them an ideal choice for coal-to-electricity retrofit and heat pump projects.
Models with the A/G suffix are standard fixed-frequency high-efficiency units that offer outstanding value and easy maintenance, serving as the go-to "seamless upgrade" option for energy-efficiency retrofits of old equipment. The entire series supports T3 high-temperature operation, ensuring zero cooling performance degradation even at 50°C ambient temperature. The numbers 303–373 represent the power rating level (×100W), making model selection clear and intuitive. One compressor adapts to multiple refrigerants including R410A and R407C, providing full coverage for industrial and commercial applications.
Included Models: C-SB303H8A, C-SB303H8G, C-SB353H8A, C-SB353H8G, C-SBN303H8D, C-SBN303H8H, C-SBN353H8D, C-SBN353H8H, C-SBN373H8D, C-SBN373H8H, C-SB453H8A, C-SB453H8F, C-SB453H8G
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Product Positioning: Commercial cabinet units, cassette units, small unitary systems, and heat pump systems.
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Technical Features:
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SBN Series (D/H suffix): Built-in EVI port; heating capacity at -15°C increased by over 20%; preferred choice for coal-to-electricity projects.
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SB Series (A/G suffix): Standard fixed-frequency high-efficiency units; high cost-effectiveness and easy maintenance/replacement.
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Optimized for T3 high-temperature operation; cooling capacity does not degrade at 50°C ambient temperature.
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Numbers 303–373 represent power rating (×100W), e.g., 373 corresponds to the 37.3kW class.
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Suitable Applications: Commercial cabinet units, cassette units, heat pump water heaters, small unitary systems.









