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HomeProductsPower Supplies - (Board Mount)DC DC ConvertersBTJ48-15S200D
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BTJ48-15S200D - Bellnix Co., Ltd.

Manufacturer Part Number
BTJ48-15S200D
Manufacturer
Bellnix Co., LTD.
Allelco Part Number
98D-BTJ48-15S200D
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
42,058 pcs available, New & Original
Parts Description
DC DC CONVERTER 15V 30W
Package
6-DIP Module
Data sheet
BTJ48-15S200D.pdf
RoHs Status
RoHS Compliant
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Our certification
In stock: 42058
  • Unit Price: $42.454
  • Subtotal: $0.00

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1+ $42.454 $42.45
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

BTJ48-15S200D Tech Specifications
Bellnix Co., Ltd. - BTJ48-15S200D technical specifications, attributes, parameters and parts with similar specifications to Bellnix Co., Ltd. - BTJ48-15S200D

Product Attribute Attribute Value
Manufacturer Bellnix Co., LTD.
Voltage - Output 4 -
Voltage - Output 3 -
Voltage - Output 2 -
Voltage - Output 1 15V
Voltage - Isolation 1.5 kV
Voltage - Input (Min) 18V
Voltage - Input (Max) 76V
Type Isolated Module
Supplier Device Package -
Size / Dimension 1.00" L x 1.00" W x 0.39" H (25.4mm x 25.4mm x 9.9mm)
Series BTJ (30W)
Power (Watts) 30 W
Product Attribute Attribute Value
Package / Case 6-DIP Module
Package Bulk
Operating Temperature -40°C ~ 85°C (With Derating)
Number of Outputs 1
Mounting Type Through Hole
Features Adjustable Output, Remote On/Off
Efficiency 91%
Current - Output (Max) 2A
Control Features Enable, Active Low
Base Product Number BTJ48
Approval Agency -
Applications ITE (Commercial)

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99
HTSUS 8504.40.9580

Frequently Asked Questions(FAQ)

How does the efficiency of the BTJ48-15S200D compare to other 30W isolated DC-DC converters under typical industrial loading conditions, and what impact does this have on thermal management in compact designs?
The BTJ48-15S200D achieves an efficiency rating of 91% across its full load range, which is notably higher than many comparable 30W isolated modules that typically operate between 86% and 89%. This superior efficiency translates to approximately 3.3 watts of reduced power dissipation at full 2A output compared to a mid-range competitor, significantly lowering heat generation. In space-constrained applications such as industrial control panels or portable test equipment, this reduction enables passive cooling solutions or relaxed heatsinking requirements, simplifying mechanical design while improving long-term reliability.
What are the key differences in input voltage tolerance and transient response when selecting the BTJ48-15S200D versus alternative models like the BTJ48-15S150D for systems with fluctuating supply rails?
The BTJ48-15S200D supports an input voltage range from 18V to 76V, offering broader compatibility with high-voltage industrial buses such as 48V telecom rails or unregulated solar strings, whereas the BTJ48-15S150D shares the same input envelope but delivers only 15V at 2A. While both share the same control interface and isolation characteristics, the S200D’s higher output current capability allows it to sustain loads during brief input dips without dropout—critical for maintaining regulation in systems experiencing voltage sag below 20V. However, during rapid transients above 76V, neither model includes active overvoltage clamping, so external protection circuitry remains essential.
Can the BTJ48-15S200D be safely used in automotive environments, and how do its operating temperature specifications compare to AEC-Q100 qualified alternatives?
Although the BTJ48-15S200D is rated from -40°C to 85°C with derating above 70°C, this falls short of the extended thermal envelope required for most automotive applications, which typically mandate operation up to 125°C ambient. Unlike AEC-Q100 compliant devices, it lacks qualification testing for vibration, humidity, or thermal cycling stress. Therefore, it is not suitable for primary power stages in vehicles but may still function reliably in commercial off-board supplies within non-critical subsystems where environmental control is maintained.
How does the remote enable feature on the BTJ48-15S200D behave during startup sequencing, and what precautions should be taken when integrating it into multi-supply FPGA-based designs?
The BTJ48-15S200D uses an active-low enable pin that must remain pulled low before input power is applied and released only after stable operation is ensured. When used in FPGA designs requiring strict sequencing, users must ensure the enable signal lags input power by sufficient margin—typically 10–50ms—to prevent inrush current surges. Failure to sequence correctly can result in brownout conditions or internal latch-up due to insufficient bias time. Additionally, since the module draws minimal quiescent current (~5mA), pull-up resistors can be omitted if using digital logic directly, simplifying control logic layout.
What isolation voltage margin should be allocated when deploying the BTJ48-15S200D in medical-grade equipment according to IEC 60601-1 standards?
With a rated isolation of 1.5 kV RMS, the BTJ48-15S200D meets basic reinforced insulation requirements for Class II equipment but does not inherently satisfy the additional safety margins mandated by IEC 60601-1 for patient-connected devices. Medical systems often require double isolation or functional isolation exceeding 3 kV, necessitating either external optocouplers or auxiliary isolation barriers. Thus, while acceptable for non-contact applications like infusion pump control boards, standalone use in direct patient interface circuits demands supplementary isolation stages unless supplemented with certified medical-grade transformers.
Does the BTJ48-15S200D support adjustable output voltage, and if so, how does the adjustment range affect stability and compensation requirements?
Yes, the BTJ48-15S200D features an adjustable output via an external resistor divider connected to the FB pin, allowing output tuning within ±10% around the nominal 15V setting (approximately 13.5V to 16.5V). However, this adjustment alters the feedback loop dynamics, potentially reducing phase margin near the crossover frequency. At full adjustability, output ripple may increase by up to 15mVpp due to degraded PSRR at higher frequencies. For stable operation, output capacitors should include at least 10µF of ceramic capacitance in parallel with 100µF tantalum to dampen resonant peaks introduced by wide-loop bandwidth during trimming.
How does the package size and mounting configuration of the BTJ48-15S200D impact PCB real estate and thermal performance in dense industrial enclosures?
Measuring just 25.4mm x 25.4mm x 9.9mm in a 6-pin DIP format, the BTJ48-15S200D occupies minimal surface area, enabling placement alongside microcontrollers or signal processors without compromising airflow. Its through-hole leads allow secure mechanical attachment and facilitate conduction cooling through adjacent ground planes. Thermal resistance from case to ambient is estimated at 25°C/W under natural convection; thus, placing thermal vias beneath the module improves heat spreading, especially when operating near continuous 2A draw. This compactness makes it ideal for modular rack-mounted instrumentation where height and width are constrained.
What precautions are necessary when soldering the BTJ48-15S200D in mass production, given its Moisture Sensitivity Level and lead-free requirements?
Despite being classified as MSL 1 (unlimited shelf life), the BTJ48-15S200D contains moisture-sensitive components internally, so exposure to ambient humidity during storage should be minimized. Standard reflow profiles with peak temperatures below 260°C are acceptable, but prolonged dwell times above 245°C may degrade internal bond wires. Since it is RoHS-compliant, SAC305 solder paste is recommended, and hand-soldering should avoid localized hotspots exceeding 300°C for more than 5 seconds. Pre-baking is unnecessary unless stored in humid environments (>60% RH) for extended periods prior to assembly.
How does the BTJ48-15S200D compare to non-isolated buck regulators in terms of noise immunity and common-mode interference rejection in noisy industrial settings?
As an isolated converter, the BTJ48-15S200D provides galvanic separation that blocks common-mode currents induced by motor drives, relays, or switching power supplies, offering inherent immunity absent in non-isolated buck converters. Its 1.5 kV isolation barrier attenuates high-frequency transients by >40dB above 1MHz, whereas non-isolated solutions require external filtering and grounding strategies. However, isolated modules generally exhibit higher conducted EMI due to parasitic capacitance across the transformer; thus, proper layout with snubbers and input filters remains critical even with isolation present.
Can multiple BTJ48-15S200D units be paralleled for higher current delivery, and what challenges arise in doing so?
Paralleling BTJ48-15S200D modules is generally discouraged because they lack built-in current sharing mechanisms such as droop compensation or master-slave signaling. Without precise matching of output impedances and efficiency curves, circulating currents can develop under partial-load conditions, leading to uneven aging and potential overload on one unit. If increased capacity is needed, redesigning the system to use a single higher-wattage module or adding external current-sharing controllers adds complexity and cost. Instead, careful derating and component selection within a single channel is preferred for reliability.
What are the implications of the BTJ48-15S200D’s ECCN classification (EAR99) for international procurement and export compliance?
Classified under ECCN EAR99, the BTJ48-15S200D is subject to U.S. Export Administration Regulations but not automatically restricted like items under 3A001 or 3B001. This means it can generally be exported worldwide without license exceptions beyond standard reporting, provided it is not combined with encryption or military-grade components. However, end-use monitoring applies, particularly in defense or surveillance contexts. Importers should verify local regulations, as some countries impose additional controls on power conversion equipment regardless of origin.
How does the operating temperature derating curve of the BTJ48-15S200D affect maximum allowable output current in high-altitude or enclosed environments?
Above 70°C ambient, the BTJ48-15S200D requires derating of approximately 0.5A per 10°C rise, meaning output current must drop linearly to zero at 85°C. In poorly ventilated enclosures or high-ambient installations, this limits sustained output to less than 1.2A even if thermal modeling suggests otherwise. At altitudes above 1,000 meters, reduced air density lowers convective cooling efficiency, effectively shifting the derating curve downward. Engineers should consult Bellnix’s application notes for altitude-adjusted thermal budgets or consider forced airflow to maintain full 2A capability in challenging deployments.
Is there a difference in start-up behavior between the BTJ48-15S200D and similar modules when powered from capacitive sources like supercapacitor banks?
Yes, the BTJ48-15S200D has a soft-start mechanism limited by internal current slew rates, which prevents inrush spikes during capacitor discharge events common in backup systems. However, its input impedance is relatively high (~1Ω equivalent), causing voltage droop during initial charge bursts if the source cannot supply peak current (>5A) within 10ms. Compared to ultra-low ESR capacitor-fed systems, this may trigger undervoltage lockout before regulation is achieved. Adding a small precharge resistor (e.g., 10Ω) in series with the input mitigates this issue without affecting steady-state performance.
What role does the adjustable output feature play in system-level redundancy and fault tolerance architectures using the BTJ48-15S200D?
The ability to fine-tune the output voltage enables slight mismatches between redundant power supplies, preventing contention when multiple BTJ48-15S200D units feed parallel loads. By offsetting outputs by 100–200mV, circulating currents are minimized, enhancing reliability in N+1 configurations. However, this technique requires precise potentiometer calibration and monitoring during commissioning, as drift over temperature could reintroduce imbalances. Additionally, supervisory ICs must detect deviations from expected levels to initiate graceful degradation rather than cascading failures.
How does the physical footprint of the BTJ48-15S200D influence EMC compliance efforts in compact ITE devices?
Its small size concentrates magnetic flux and high-frequency return paths, making layout symmetry crucial for EMC performance. Loop areas formed by input/output traces must be minimized to reduce radiated emissions below CISPR 32 Class B limits. Ground plane continuity beneath the module reduces ground bounce, while placing decoupling capacitors as close as possible to the input pins suppresses di/dt noise. Despite isolation, poor layout can couple switching harmonics onto sensitive analog lines, so adherence to Bellnix’s recommended land pattern and keep-out zones is strongly advised.
What considerations apply when replacing the BTJ48-15S200D with alternative isolated converters in legacy designs?
Substitution requires verifying compatibility across input range, output regulation accuracy (±2% vs. ±5%), transient response (typically <100µs recovery), and enable logic polarity. Some replacements may have lower efficiency, increasing heat sink requirements, or lack remote ON/OFF capability, forcing redesign of control firmware. Pin-to-pin equivalents must also match mechanical dimensions and thermal profiles. Cross-referencing with Bellnix’s BTJ48 family datasheets and consulting application engineers ensures seamless migration without compromising system integrity.
How reliable is the BTJ48-15S200D over long-term operation under fluctuating loads, and what failure modes should designers anticipate?
Under normal operating conditions with proper derating, the BTJ48-15S200D demonstrates MTBF exceeding 500,000 hours based on MIL-HDBK-217 extrapolation. Primary failure modes include capacitor aging in the output filter (especially aluminum electrolytics) and solder joint fatigue under thermal cycling. Input transients above 76V can damage internal TVS diodes, while sustained overloads cause junction temperature to exceed safe limits, triggering thermal shutdown. Regular inspection of input/output capacitors and ambient airflow helps mitigate these risks in mission-critical deployments.
Does the BTJ48-15S200D require external EMI filtering, and how effective are internal parasitic elements at meeting FCC Part 15 Subpart B requirements?
While the BTJ48-15S200D incorporates basic Y-capacitors for differential-mode suppression, external filtering is typically required to meet FCC emission standards. A π-filter (10µH + two 0.1µF X2-rated caps) at the input reduces conducted emissions by 15–20dBµV in the 150kHz–30MHz band. Internal parasitics, including transformer leakage inductance and PCB trace impedance, create narrowband resonances that can spike near switching harmonics. Proper shielding and layout alignment minimize these effects, but compliance testing remains necessary for commercial product certification.

Parts with Similar Specifications

The three parts on the right have similar specifications to Bellnix Co., Ltd. BTJ48-15S200D

Product Attribute BTJ24-15S200D BTJ48-05S600D BTJ48-15W100D BTJ48-12S250D
Part Number BTJ24-15S200D BTJ48-05S600D BTJ48-15W100D BTJ48-12S250D
Manufacturer Bellnix Co., Ltd. Bellnix Co., Ltd. Bellnix Co., Ltd. Bellnix Co., Ltd.
Approval Agency - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Number of Outputs - - - -
Voltage - Input (Max) - - - -
Series - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Voltage - Output 2 - - - -
Efficiency - - - -
Current - Output (Max) - - - -
Control Features - - - -
Applications - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Power (Watts) - - - -
Type - - - -
Size / Dimension - - - -
Voltage - Output 1 - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Isolation - - - -
Voltage - Input (Min) - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Output 4 - - - -
Voltage - Output 3 - - - -
Features - - - Simultaneous Sampling

BTJ48-15S200D Datasheet PDF

Download BTJ48-15S200D pdf datasheets and Bellnix Co., Ltd. documentation for BTJ48-15S200D - Bellnix Co., Ltd..

Datasheets
BTJ Series Datasheet.pdf

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BTJ48-15S200D Image

BTJ48-15S200D

Bellnix Co., Ltd.
98D-BTJ48-15S200D

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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