NCE0110AK vs NCE0115K vs NCE0125AK vs IRLR3410: Full Comparison

R_DS(on) ladder, 100V TO-252 (max at 10V):

But why does the branded rival land almost exactly on the AK's resistance? Because 100V/10A-class TO-252 switching converged on the same physics — the real differences live elsewhere.

Check V_GS (±16V vs ±20V), gate charge (34nC vs 21.8nC), and the price band between a branded HEXFET and a Shenzhen workhorse.

When to Use the NCE0115K (the 15A next rung)

Step up to the 0115K when the load outgrows the AK but the board, the drive, and the footprint stay.

Same TO-252-2L footprint, same 1G/2D/3S map, ~27% lower resistance for roughly 15A-class duty.

Its higher ~2.5V threshold also makes it the safer choice in noisy low-voltage gate environments than the low-threshold KA parts.

When to Use the NCE0125AK (the 3.3V-system rung)

Choose the 0125AK when the gate comes from a 3.3V rail and the load is heavy — it carries 25A at 35mΩ with a 3V drive point, the family's answer to logic-level power switching.

The trade: ~70nC of gate charge (three times the AK's 21.8nC), so the driver must be real.

Its low threshold also needs a clean gate in high-dV/dt boards to avoid spurious turn-on.

When to Use the IRLR3410 (the branded rival)

The IRLR3410 is a legitimate direct alternative when the BOM demands an Infineon part: same 100V TO-252, 105mΩ max at its 10A test, logic-level drive, AEC-Q101 automotive variants available.

Which one wins on a real board? Check two rows before you commit: V_GS is ±16V (the AK gives you ±20V), and Q_g runs 34nC against the AK's 21.8nC.

For a gate driven from a 5V rail with ringing, the AK's wider gate rating is the real spec.

When NOT to Use This Class of MOSFET at All

❌ Skip the whole 100V TO-252 class when your rail is under ~30V. A 30V or 40V part at 5–17mΩ carries the same current for a fraction of the conduction loss.

❌ Skip it when you need to switch fast. For synchronous rectification above ~300kHz, use a part with an SR-optimized body diode, not a general-purpose 100V switch.

❌ Skip it when the tab can't get copper. A TO-252 on a minimum pad is a 10A part that behaves like a 3A part.

Pinout & Layout Notes

All four parts sit on the DPAK footprint family: 1 = gate, 2 = drain (wide lead), 3 = source, tab = drain.

Footprint reuse between the NCE rungs is safe; with the IRLR3410, confirm the vendor pad drawing.

Remember the tab is electrically live drain on every one of them.

Other Alternatives Worth Knowing

NCE0140KA — the 100V top rung at 40A/17mΩ in the same TO-252-2 footprint. Upward substitution is electrically safe, but Q_g ~94nC and Coss ~290pF demand a real driver and slow down switching. Worth knowing when stock runs dry and the board can tolerate a heavier gate.

NCE0110AS — the SOP-8 namesake at 17mΩ. Not a replacement without a layout change — it is the answer only when the board was designed for SOP-8 and conduction loss matters more than the tab.

Through-hole TO-220 classics (IRF540-class) — for bench repairs and single-unit builds where a bolt-on heatsink is easier than a copper pour, the TO-220 version of the same die family is the pragmatic read.

Frequently Asked Questions

Q1: What is the most direct replacement for the NCE0110AK?

A: The NCE0115K — same footprint, same pin map, next rung up. It is 15A at ~80mΩ against the AK's 10A at 110mΩ, with a similar ~22nC gate charge. The NCE0125AK (25A/35mΩ) also drops into the same TO-252 footprint but triples the gate charge. All three are NCE-family, same pad layout.

Q2: Can I use an IRLR3410 instead of the NCE0110AK?

A: Yes, with two spec checks. The IRLR3410 is 100V/17A at 105mΩ max — nearly the AK's resistance with more current headroom and logic-level drive. But its V_GS max is ±16V against the AK's ±20V, and Q_g is 34nC against 21.8nC. On a 5V-driven gate with ringing, the wider gate rating is the real spec.

Q3: Is stepping up to the NCE0125AK always safe?

A: Electrically yes, dynamically no — check your driver. The 0125AK's ~70nC gate charge is three times the AK's, so a weak GPIO pin will switch it slowly. Its lower ~1.6V threshold also invites spurious turn-on in high-dV/dt layouts; keep the gate trace short and the drive clean.

Q4: Why can't I just swap to the NCE0110AS?

A: Same name, different product, different package. The AS is a SOP-8 at 17mΩ max — six and a half times lower resistance — but the SOP-8 footprint and thermal behavior have nothing in common with the TO-252. A swap without a layout change is not a replacement; it is a redesign in disguise.

Q5: What should I use if I need to go smaller than the AK?

A: For genuine sub-1A continuous duty, drop to the SOT-23 family instead. The NCE0102 (100V/2A) or NCE0103Y (100V/3A, 20A pulse) cover light 48V-board loads. Downward substitution from a 10A TO-252 into a smaller package without checking the thermal budget is how boards come back discolored.

Q6: Are the footprints interchangeable between these parts?

A: The NCE TO-252-2L rungs share a pad layout; treat the IRLR3410 with a footprint check. All four are DPAK-class with 1G/2D/3S and a drain tab, but vendor pad drawings and tab sizes differ slightly. Reuse the footprint for NCE-to-NCE swaps, then verify against the Infineon pad drawing before placing the 3410.

Q7: I'm driving from 3.3V logic. Which replacement should I pick?

A: The NCE0125AK is the family's 3.3V answer. It specifies a 3V drive point with 35mΩ at 10V and 25A headroom. The AK and 0115K conduct from 3.3V (thresholds 1.0–2.0V and ~2.5V) but only guarantee R_DS(on) from 4.5V up — fine for light loads, not for full-rated current on 3.3V.

Q8: How do I verify a replacement is genuine?

A: Bench-check R_DS(on) at the datasheet test condition. For the AK that is 110mΩ max at 10V/10A; for the 0125AK, 35mΩ max. Counterfeit and re-marked TO-252 parts in this class fail the bench check and overheat at a fraction of the rated current — a few seconds under a constant-current load settles it.