The BEL Power Solutions SQ48T04120-NBB0G is a high-efficiency, isolated DC-DC converter designed for demanding electronic applications. Operating from a 36-75 V input, this compact and lightweight converter delivers up to 48W (15A) of power with industry-standard quarter-brick pinout, making it an ideal drop-in replacement for traditional quarter-brick modules. Its low profile of only 0.258 inches (6.55 mm) and weight of just 0.53 oz (15 g) facilitate easy integration into space-constrained designs.
Compliance: Meets IEC/EN 60950-1 2nd Edition, UL/CSA safety standards, and Class B conducted emissions per FCC and EN55022 with external filter
RoHS Lead-Free Solder: Yes
Design & Thermal Performance
The SemiQ™ series offers a size reduction to only 60% of standard quarter-bricks, with thermal performance exceeding most competitors’ models at high temperatures. Its advanced circuit, packaging, and thermal design ensure reliable operation in challenging environments, with excellent thermal management and minimal airflow shadowing. The converter is stable with no external capacitors required in low-inductance circuits and supports external load capacitance up to 15,000 μF depending on the output voltage.
Additional Features
Industry-standard quarter-brick pinout for easy replacement
Available in through-hole and SMT packages
Low profile and lightweight for space-constrained applications
Designed for telecommunications, data communications, wireless communications, and server applications
Operating temperature range: -40°C to +85°C
Input transient withstands 100 V for 100 ms
Positive or negative logic ON/OFF control options
Output voltage trim range: +10% / -20% with industry-standard trim equations
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{"id":10025596846397,"title":"SQ48T04120-NBB0G","handle":"sq48t04120-nbb0g","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe BEL Power Solutions SQ48T04120-NBB0G is a high-efficiency, isolated DC-DC converter designed for demanding electronic applications. Operating from a 36-75 V input, this compact and lightweight converter delivers up to 48W (15A) of power with industry-standard quarter-brick pinout, making it an ideal drop-in replacement for traditional quarter-brick modules. Its low profile of only 0.258 inches (6.55 mm) and weight of just 0.53 oz (15 g) facilitate easy integration into space-constrained designs.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: SQ48T04120-NBB0G\u003c\/li\u003e\n\u003cli\u003eManufacturer: BEL\/BEL Power Solutions\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: CN\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK (Black Package)\u003c\/li\u003e\n\u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n\u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-pow\/pow-sq48t04120-nbb0g.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical Specifications \u0026amp; Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Power: 48W (12V, 4A) with options for other voltages including 12.0V, 8.0V, 6.0V, 5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V, and 1.0V\u003c\/li\u003e\n\u003cli\u003eInput Voltage Range: 36-75 VDC\u003c\/li\u003e\n\u003cli\u003eOutput Voltage Trim Range: +10% \/ -20% (except for 1.2V and 1.0V outputs with ±10%)\u003c\/li\u003e\n\u003cli\u003eSwitching Frequency: 415 kHz\u003c\/li\u003e\n\u003cli\u003eEfficiency: High efficiency with no heat sink required\u003c\/li\u003e\n\u003cli\u003eLow Profile \u0026amp; Weight: 0.258 inches (6.55 mm), 0.53 oz (15 g)\u003c\/li\u003e\n\u003cli\u003eIsolation Capacitance: 160 pF to 260 pF depending on output voltage\u003c\/li\u003e\n\u003cli\u003eRemote Output Sense: Yes, with compensation up to +10%\u003c\/li\u003e\n\u003cli\u003eOutput Voltage Adjustment: Via external resistor for ±10% to ±20% trim\u003c\/li\u003e\n\u003cli\u003eProtection Features: Input undervoltage lockout, overcurrent protection, overvoltage protection, and thermal shutdown\u003c\/li\u003e\n\u003cli\u003eCompliance: Meets IEC\/EN 60950-1 2nd Edition, UL\/CSA safety standards, and Class B conducted emissions per FCC and EN55022 with external filter\u003c\/li\u003e\n\u003cli\u003eRoHS Lead-Free Solder: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDesign \u0026amp; Thermal Performance\u003c\/h3\u003e\n\u003cp\u003eThe SemiQ™ series offers a size reduction to only 60% of standard quarter-bricks, with thermal performance exceeding most competitors’ models at high temperatures. Its advanced circuit, packaging, and thermal design ensure reliable operation in challenging environments, with excellent thermal management and minimal airflow shadowing. The converter is stable with no external capacitors required in low-inductance circuits and supports external load capacitance up to 15,000 μF depending on the output voltage.\u003c\/p\u003e\n\n\u003ch3\u003eAdditional Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-standard quarter-brick pinout for easy replacement\u003c\/li\u003e\n\u003cli\u003eAvailable in through-hole and SMT packages\u003c\/li\u003e\n\u003cli\u003eLow profile and lightweight for space-constrained applications\u003c\/li\u003e\n\u003cli\u003eDesigned for telecommunications, data communications, wireless communications, and server applications\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eInput transient withstands 100 V for 100 ms\u003c\/li\u003e\n\u003cli\u003ePositive or negative logic ON\/OFF control options\u003c\/li\u003e\n\u003cli\u003eOutput voltage trim range: +10% \/ -20% with industry-standard trim equations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eContact \u0026amp; Support\u003c\/h3\u003e\n\u003cp\u003eFor technical support, email \u003ca href=\"mailto:tech.support@psbel.com\"\u003etech.support@psbel.com\u003c\/a\u003e. Additional information can be found at \u003ca href=\"http:\/\/www.belpowersolutions.com\/\" target=\"_blank\"\u003ebelpowersolutions.com\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eNote\u003c\/h3\u003e\n\u003cp\u003eDatasheet was not processed please search the internet for the part number for more details.\u003c\/p\u003e\u003cbr\u003e","published_at":"2025-08-14T21:15:15+05:30","created_at":"2025-08-14T21:15:15+05:30","vendor":"Waldom Electonics","type":"DC-DC Converter","tags":["12V","48W","BEL-BELP","DC","IMPORT_CSV","Isolated","WLDM"],"price":981086,"price_min":981086,"price_max":981086,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50620336013629,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"SQ48T04120-NBB0G","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"SQ48T04120-NBB0G","public_title":null,"options":["Default Title"],"price":981086,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"SQ48T04120-NBB0G","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/SQ48T04120-NBB0G_45586872_df7e4978.jpg?v=1755186319"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/SQ48T04120-NBB0G_45586872_df7e4978.jpg?v=1755186319","options":["Title"],"media":[{"alt":null,"id":45840445047101,"position":1,"preview_image":{"aspect_ratio":1.0,"height":200,"width":200,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/SQ48T04120-NBB0G_45586872_df7e4978.jpg?v=1755186319"},"aspect_ratio":1.0,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/SQ48T04120-NBB0G_45586872_df7e4978.jpg?v=1755186319","width":200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe BEL Power Solutions SQ48T04120-NBB0G is a high-efficiency, isolated DC-DC converter designed for demanding electronic applications. Operating from a 36-75 V input, this compact and lightweight converter delivers up to 48W (15A) of power with industry-standard quarter-brick pinout, making it an ideal drop-in replacement for traditional quarter-brick modules. Its low profile of only 0.258 inches (6.55 mm) and weight of just 0.53 oz (15 g) facilitate easy integration into space-constrained designs.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: SQ48T04120-NBB0G\u003c\/li\u003e\n\u003cli\u003eManufacturer: BEL\/BEL Power Solutions\u003c\/li\u003e\n\u003cli\u003eCountry of Origin: CN\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: EA\u003c\/li\u003e\n\u003cli\u003eECCN: EAR99\u003c\/li\u003e\n\u003cli\u003ePackage Type: BLK (Black Package)\u003c\/li\u003e\n\u003cli\u003eRoHS Compliant: Yes\u003c\/li\u003e\n\u003cli\u003eDatasheet: \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-pow\/pow-sq48t04120-nbb0g.pdf\" target=\"_blank\"\u003eDownload Datasheet\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical Specifications \u0026amp; Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutput Power: 48W (12V, 4A) with options for other voltages including 12.0V, 8.0V, 6.0V, 5.0V, 3.3V, 2.5V, 2.0V, 1.8V, 1.5V, 1.2V, and 1.0V\u003c\/li\u003e\n\u003cli\u003eInput Voltage Range: 36-75 VDC\u003c\/li\u003e\n\u003cli\u003eOutput Voltage Trim Range: +10% \/ -20% (except for 1.2V and 1.0V outputs with ±10%)\u003c\/li\u003e\n\u003cli\u003eSwitching Frequency: 415 kHz\u003c\/li\u003e\n\u003cli\u003eEfficiency: High efficiency with no heat sink required\u003c\/li\u003e\n\u003cli\u003eLow Profile \u0026amp; Weight: 0.258 inches (6.55 mm), 0.53 oz (15 g)\u003c\/li\u003e\n\u003cli\u003eIsolation Capacitance: 160 pF to 260 pF depending on output voltage\u003c\/li\u003e\n\u003cli\u003eRemote Output Sense: Yes, with compensation up to +10%\u003c\/li\u003e\n\u003cli\u003eOutput Voltage Adjustment: Via external resistor for ±10% to ±20% trim\u003c\/li\u003e\n\u003cli\u003eProtection Features: Input undervoltage lockout, overcurrent protection, overvoltage protection, and thermal shutdown\u003c\/li\u003e\n\u003cli\u003eCompliance: Meets IEC\/EN 60950-1 2nd Edition, UL\/CSA safety standards, and Class B conducted emissions per FCC and EN55022 with external filter\u003c\/li\u003e\n\u003cli\u003eRoHS Lead-Free Solder: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDesign \u0026amp; Thermal Performance\u003c\/h3\u003e\n\u003cp\u003eThe SemiQ™ series offers a size reduction to only 60% of standard quarter-bricks, with thermal performance exceeding most competitors’ models at high temperatures. Its advanced circuit, packaging, and thermal design ensure reliable operation in challenging environments, with excellent thermal management and minimal airflow shadowing. The converter is stable with no external capacitors required in low-inductance circuits and supports external load capacitance up to 15,000 μF depending on the output voltage.\u003c\/p\u003e\n\n\u003ch3\u003eAdditional Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-standard quarter-brick pinout for easy replacement\u003c\/li\u003e\n\u003cli\u003eAvailable in through-hole and SMT packages\u003c\/li\u003e\n\u003cli\u003eLow profile and lightweight for space-constrained applications\u003c\/li\u003e\n\u003cli\u003eDesigned for telecommunications, data communications, wireless communications, and server applications\u003c\/li\u003e\n\u003cli\u003eOperating temperature range: -40°C to +85°C\u003c\/li\u003e\n\u003cli\u003eInput transient withstands 100 V for 100 ms\u003c\/li\u003e\n\u003cli\u003ePositive or negative logic ON\/OFF control options\u003c\/li\u003e\n\u003cli\u003eOutput voltage trim range: +10% \/ -20% with industry-standard trim equations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eContact \u0026amp; Support\u003c\/h3\u003e\n\u003cp\u003eFor technical support, email \u003ca href=\"mailto:tech.support@psbel.com\"\u003etech.support@psbel.com\u003c\/a\u003e. Additional information can be found at \u003ca href=\"http:\/\/www.belpowersolutions.com\/\" target=\"_blank\"\u003ebelpowersolutions.com\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eNote\u003c\/h3\u003e\n\u003cp\u003eDatasheet was not processed please search the internet for the part number for more details.\u003c\/p\u003e\u003cbr\u003e"}
