Keep a DC-link waveform distinct from a sine-wave motor duty

The B2562 power-capacitor document defines its operating DC waveform as non-reversing while retaining an alternating ripple component. Ripple therefore does not automatically turn that duty into the same waveform context as a capacitor whose intended circuit repeatedly reverses voltage. The shape and direction of the operating waveform are part of what the named capacitor is being described as doing.

The B32320/B32322 document identifies general sine-wave applications, principally motor-run use. This is a different circuit-duty reference from the B2562 DC description. A shared film construction or nominal capacitance does not remove the distinction: those attributes concern what the component is, while the waveform description concerns the electrical duty assigned to the named product.

Retain the source and circuit role with that comparison rather than rebuilding a general list of AC, DC and category-voltage definitions. The present question is whether the named waveform and function have remained identifiable. No RMS-to-peak conversion, voltage selection or equivalence follows from the shared material description. A motor capacitor cannot acquire a DC-link role, or the reverse, merely because the abbreviated capacitance fields resemble each other.

Identify the auxiliary-winding phase-shift role

The historical B32350 LCap application note gives the motor-run function a more concrete circuit meaning. Its named bidirectional induction-motor example distinguishes main and auxiliary windings and assigns the capacitor a phase-shift responsibility. This is different from identifying an unspecified capacitor associated with a DC bus: the function is defined through the relationship of the motor windings in the described application.

A phase-shift role is also different from an electrode-construction label. Knowing that a capacitor uses metallised film does not explain which winding relationship it participates in. Conversely, an old motor position does not identify the complete component construction or its present limits. The circuit responsibility and exact product evidence need to remain attached rather than being replaced by one familiar material term.

Use the historical account to explain the function, without reproducing its switch arrangement or prescribing motor connections. The note's main/auxiliary distinction supplies context for the named phase-shift duty; it does not demonstrate rotation, starting performance or suitability of another motor. Its2012 date also remains part of the source identity, rather than evidence of current LCap availability or a present application approval.

Separate an integrated LCap from a capacitor-only item

The cited LCap is an integrated capacitor-and-inductor item, rather than a capacitor-only description. The application note assigns the capacitor its phase-shift role and the series inductor a current-limiting responsibility. Combining them within one supplied case does not make those two functions interchangeable, and the nominal capacitance cannot describe the complete integrated assembly.

The note explains the inductor's purpose through an unwanted switching condition. If both of the described AC switching paths conduct together, a capacitor discharge path can impose electrical stress on the switches. The inductor addresses the current in that event. This is a distinct responsibility from creating the intended phase shift during the motor's operating duty.

Preserving the integrated function helps keep a component-only offer separate from the historical combined device. It does not identify an LCap from case appearance or establish that another motor-run capacitor includes the additional element. The explanation adopts no discharge peak, protective value or claimed manufacturing improvement. It also gives no switch, motor or wiring recipe and no assurance that a previously used assembly retains its documented behavior.

Keep continuous, transient and thermal load descriptions distinct

The B2562 definitions distinguish current sustained during continuous operation from a repetitive peak and a surge permitted only for a limited event context. These descriptions address different aspects of the waveform and its occurrence. A single current headline would remove the distinction between an ongoing burden, repeated excursions and an exceptional disturbance.

Thermal descriptions likewise refer to different places. Ambient concerns surrounding air, case temperature concerns the enclosure, and the hot spot concerns the hottest internal region. The named document separates these locations rather than treating one temperature label as a measurement of them all. A current description and an external temperature reference consequently do not establish a known internal operating result.

This account retains those named stress categories without calculating loss, thermal rise or a permissible pulse. It does not reproduce the separate aluminium-capacitor ripple-frequency treatment in the related guide. The distinctions complete the circuit-duty description: waveform and motor function identify the role, an integrated inductor identifies additional supplied functionality, and the current/thermal categories identify different stress questions. None supplies lifetime, surge testing or interchangeability for offered material.

Sources and further reading

TDK B2562 April 2026 physical pages 7–8; B32320/B32322 September 2016 physical page 2; historical B32350 LCap December 2012 application prose on physical pages 2–3,5–6. Numerical conversions, circuits, formulas, current LCap availability and application/lifetime claims are excluded.