TDM750T14-13K5IRF Bidirectional DC-DC Power Module for 750V Battery Test and Energy-Recyclable Systems

30-Second Fit Check for RFQ Teams

Start with the electrical envelope. In the positive direction, the module is designed around a 750VDC high-voltage input, with full-load operation in the 740-800VDC range and derated operation when the HV input is between 700VDC and 740VDC. The low-voltage side is 14.5VDC at up to 932A, with 13.5kW rated output capacity. In the reverse direction, the low-voltage side is again 14.5VDC, with 745A rated input current and 10.8kW rated input capacity, returning energy to a 700-770VDC HV output range at full load, with derating from 770VDC to 800VDC.

This profile is not a general-purpose 24V or 48V converter. It is a project-level bidirectional DC-DC power module for systems where high current at a low-voltage bus must be controlled, recovered, and routed efficiently. If your project involves cell formation, battery pack testing, supercapacitor cycling, low-voltage high-current aging, or regenerative load architecture, this class of module can reduce wasted energy and heat compared with purely dissipative methods.

Use this quick screen before moving to a quote: confirm the HV bus nominal/min/max, confirm that 14.5VDC is acceptable for the LV side, check whether 13.5kW forward and 10.8kW reverse power meet your test profile, verify that CAN communication fits the controller design, and make sure your cabinet can support forced-air cooling with rear inlet and front outlet airflow. For a detailed fit review, send these values through the TPS TDM750T14-13K5IRFU quote page.

What the TDM750T14-13K5IRF Does

The TDM750T14-13K5IRF is positioned as a DC-DC bidirectional power module with high-frequency isolation, mature soft-switching technology, intelligent forced-air cooling, fault protection, and CAN communication. In practical terms, it is built to move energy in both directions between the high-voltage DC bus and the low-voltage high-current bus. During charging, formation, or forward conversion, energy flows from the 750V-class side to the 14.5V side. During regenerative discharge or reverse test modes, energy can be returned from the low-voltage side to the high-voltage bus rather than being burned off as heat.

That bidirectional capability is the commercial value for BoFu buyers. Procurement is not only comparing price per watt; it is comparing whether a supplier can support a complete energy-recycling architecture, the right documentation, and the engineering conversations needed before the purchase order. Electrical engineers will focus on stability, ripple, derating behavior, and protection logic. Panel builders will focus on mechanical envelope, mounting holes, torque control, cable clearance, fan clearance, and service access. System integrators will focus on how the module behaves inside the test sequence, how CAN data is managed, and how cabinet airflow and safety interlocks are implemented.

TPS has capabilities around bidirectional power modules and adjacent project support. If your equipment requires other DC bus levels, AC/DC front-end conversion, magnetics, enclosure work, wire harnesses, or cabinet integration, TPS can discuss the module as part of a broader power conversion solution rather than a standalone component. For more context on system-level decision criteria, see the TPS guide on bidirectional power supply selection and compliance.

Who should evaluate this module?

Evaluate this module if your project requires a 750V-class DC bus, a 14.5V high-current bus, bidirectional energy flow, and a compact module that can be installed in industrial test or energy conversion equipment. Do not treat it as a drop-in replacement without checking the LV voltage constraint, reverse power requirement, thermal airflow, and final compliance documentation. For formal sourcing, ask TPS to confirm the exact model suffix, quotation revision, and expandability limit for your configuration.

Key Specifications That Drive Selection

The most important specifications are the voltage windows, power rating in each direction, thermal derating rules, and interface details. The module reaches 94.5% peak efficiency at 750VDC according to the published specification. This is important for energy-recyclable equipment because every percentage point of efficiency affects heat load, fan sizing, cabinet thermal margin, and operating cost. However, realized efficiency depends on your actual operating point, duty cycle, cable losses, bus stability, and cooling design.

The low-voltage side deserves special attention. The specification warns that LV output above 25VDC can cause power failure. This should be reviewed in your control strategy, fixture wiring, transient behavior, and abnormal condition planning. If your equipment is switching between charge, rest, discharge, and regenerative modes, confirm what the controller does at startup, fault recovery, emergency stop, and bus precharge.

Application Fit: Where This Module Makes Sense

The first strong fit is cell formation and test equipment. In battery manufacturing and module validation, equipment may need precise low-voltage high-current output for charge steps, followed by controlled discharge or regenerative energy return. A bidirectional isolated module helps designers build a system that can cycle energy instead of wasting it in purely resistive loads. TPS can discuss how this module may fit alongside fixtures, harnesses, cabinet wiring, and project-specific controls.

The second fit is energy-recyclable power aging equipment. For power electronics manufacturers, burn-in or aging platforms can consume substantial power. When the load profile allows energy recovery, a bidirectional module can improve system economics and reduce cooling burden. The exact savings depend on duty cycle and system architecture, so procurement should ask for an application review rather than relying on a single headline efficiency value.

The third fit is bidirectional testing and energy storage scenarios where the equipment must exchange energy with a 750V-class DC bus. If your architecture also requires an AC/DC bidirectional stage, compare the DC/DC module role with related TPS resources such as the 53kW bidirectional AC-DC module guide and the TBM750 bidirectional power module overview. Those references can help teams separate the DC/DC conversion layer from the grid-facing conversion layer.

Selection logic for BoFu buyers

Use the TDM750T14-13K5IRF when the power path is known, the HV and LV voltage ranges match the published window, and your engineering team can design the surrounding busbar, control, cooling, and protection system. Consider a custom or alternate TPS solution when your LV bus is not 14.5V, your reverse power is much higher than 10.8kW, your enclosure cannot support the specified airflow, or your compliance path requires documentation beyond the standard module data. In those cases, TPS can still support the discussion with equivalent products, modified integration, or project-level engineering support.

Integration, Cooling, Wiring, and Controls

Successful integration starts with airflow. The module uses forced-air cooling with intelligent control, with rear inlet and front outlet airflow. The front side includes the fan area, while the rear side includes terminal access. Panel builders should preserve the airflow path, avoid tight cable bundles in the fan discharge zone, and verify filter strategy if the enclosure is used in dusty industrial spaces. The module supports full-load operation from -10°C to 45°C, but 45°C to 60°C requires derating. Above 1000m altitude, the specification lists power derating of 1% per 100m up to 3000m. These values should be included in the enclosure thermal calculation.

Mechanical planning is also important. The module is compact for its power class at 300mm x 220mm x 86mm and less than 5.5kg, but high current on the low-voltage side makes terminal layout, conductor sizing, busbar design, and torque control critical. The installation drawing lists M3 threaded mounting holes with 6mm hole depth and warns that screw length must not exceed the hole depth at the reserved mounting positions. It also identifies terminal fastening hardware, including M5-class output terminal screws and M4-class input terminal screws with defined tightening torque. Confirm final hardware details in the latest drawing package before panel release.

Controls should be reviewed early. The module provides CAN communication and blue/red indicator lamp status for operation and fault. If your system already has a PLC, industrial PC, or battery test controller, map the CAN commands, fault states, startup sequence, and emergency stop behavior before approving the electrical design. TPS can support engineering discussions around module selection and, where needed, associated services such as custom cable assemblies, custom sheet metal enclosures, and industrial control cabinet integration.

Expandability and revision control

The uploaded specification and online product content may reflect different revision data for expandability. Treat this as an RFQ confirmation item, not as an assumption. State the number of modules, expected operating mode, synchronization requirement, cabinet layout, and cooling concept. TPS can then confirm the applicable product revision, recommended configuration, and whether a standard module or customized solution is the best path.

Compliance, Reliability, and Verification Questions

The specification highlights EMC performance and states that the module meets EN 55032 and other international standards, with references to UL, CE, and CCC. For procurement and compliance engineers, this should be handled carefully: component-level statements help supplier screening, but final acceptance depends on the exact model, certificate availability, installation, grounding, shielding, wiring, enclosure design, and end-product test plan. During RFQ, request the latest datasheet, certificate list if available, declaration documents, and any recommended EMC installation practices.

Reliability is tied to operating margin. A module running near current limit, near the derating boundary, at high ambient temperature, or with restricted airflow may still operate, but it may not meet the lifetime expectations of a production system. Electrical engineers should review over-temperature shutdown after overload, fault indicator behavior, and recovery behavior. Procurement should ask whether the planned operating point is continuous, intermittent, or peak-only. System integrators should validate how the module responds when the DUT, battery channel, or bus contactor produces unexpected transients.

TPS can support these checks with a practical project review. Beyond this DC/DC module, TPS also offers related power electronics manufacturing and integration capabilities. For projects that need custom magnetics, cold plates, cable harnesses, or power electronics assembly, relevant TPS resources include power electronics manufacturing services, custom transformers and inductors, and liquid cold plate design. Even when the standard TDM module is selected, these services can help reduce integration risk for OEMs and test-equipment builders.

RFQ Checklist: What to Send TPS

A good RFQ should let TPS confirm fit quickly and avoid multiple clarification cycles. Include the target quantity, project location, required delivery window, operating voltage range, forward and reverse power profile, duty cycle, cooling assumptions, ambient temperature, altitude, cabinet concept, communication requirements, compliance market, and any requested customization. If your project is replacing an existing module, provide the electrical envelope and mechanical constraints without making the RFQ a brand-specific comparison. The goal is to define the application requirement and evaluate the best TPS solution.

• HV bus: nominal voltage, min/max voltage, precharge method, and allowable reverse energy return window.
• LV bus: required setpoint, current profile, busbar design, allowable ripple, and protection strategy.
• Power profile: continuous and peak forward power, continuous and peak reverse power, duty cycle, and thermal cycle.
• Mechanical: available space, fan clearance, mounting orientation, cable route, service access, and enclosure IP/environment needs.
• Controls: CAN protocol expectations, fault handling, system interlocks, data logging, and controller platform.
• Compliance: destination market, required certificate documents, EMC plan, and system-level test schedule.
• Commercial: quantity, forecast, target delivery date, packaging preferences, and procurement approval process.

If the standard TDM750T14-13K5IRF fits, TPS can quote the relevant module and support final specification review. If the application sits outside the published range, TPS can discuss equivalent or custom alternatives. That may involve a different bidirectional module, a cabinet-level solution, custom harnessing, enclosure support, thermal design, or manufacturing services. For another DC/DC reference point, review the TPS article on the TDM570T15-12KIRF bidirectional DC-DC module.