SCP is Huawei's own low-voltage direct-charge protocol, and the certification covers the power-supply accessories: adapter, car charger, power bank and cable. Wireless charging is a separate track. The host devices — phones and tablets — Huawei controls itself, so accessory certification does not reach them. Sort the two ends clearly before you start, or you will prepare the wrong documentation.
The tier sets the test volume. At 22.5 W, 40 W, 66 W and 100 W, whichever tier you claim support for, that tier's charge curve must be run end to end — link setup, steady state, trickle cutoff — against the official reference-unit curve. If you also claim FCP support, both handshakes must run; miss one and it fails.
Interface and tier are not rigidly bound — note that first. The A-port SCP negotiates the private protocol over D+ and D−; the mainstream 22.5 W, 40 W and 66 W chargers all run this line, and the Huawei Mate-series original 66 W is an A-port moulded connector. The C-port SCP/HVSCP (high-voltage tier, above 100 W, including the PD PPS-compatible path) carries the private messages over the CC channel. Dual-port hybrid products have the two channels contending, so the switching logic must be verified on its own.
The continuous-handshake item is the strictest: zero failures required. One mid-way dropout, one timeout, or one fall-back to 5 volts means a straight fail. The "one-in-a-thousand failure rate allowed" story online is nonsense; how many exactly depends on the current certification spec.
The cable is tested along with it. SCP cables handshake through a dedicated identification resistor or protocol chip, not an E-Marker — that is the USB PD way. Once cable impedance rises, the handshake will not build at all, and the lab rejects the whole unit.
Temperature rise runs under normal-temperature and high-temperature conditions, measured at the enclosure and the terminal battery, with limits per the current spec. Something designed only for normal temperature will likely fail under high temperature.
On the limit there are two camps arguing: one says high temperature tightens to 60 degrees, the other says it stays at 65. The 60-degree figure is mostly a brand's own internal control line, not an SCP mandatory metric. Before setting your design margin, ask where the number comes from; do not write an internal control line into the spec as if it were mandatory.
There is also a common low-temperature misunderstanding: minus 10 degrees is the adapter's storage temperature, not a charging temperature. A phone battery limits current at low temperature, and the adapter only does low-temperature storage reliability. SCP certification does not require a low-temperature fast-charge running test.
Short circuit, overvoltage, overcurrent and overtemperature — all four protections must be present, judged by the hardware cut-off action under extreme fault. Write hardware timing and software response separately: if the software-layer protocol steps power down slowly, do not stuff the hardware cut-off time into the spec as the software response time — R&D most often gets confused right there.
Abnormal conditions also test cable breakage and loose interface, simulating daily plug wear. The 88 W and 100 W high-power tiers add a dynamic-load jump test; an integrated unit combining wireless charging with wired also needs the wireless temperature-rise and foreign-object-detection additions.
Self-test uses Huawei-designated models and official tools, covering the representative models of the claimed power segment; tiers you declare unsupported skip the corresponding cases. The "release only after the full run" claim is a misreading, but if the documentation lists a function you did not test, the final review will still make you add it.
Prepare three to five samples in mass-production final state, with cables and adapters complete and firmware at the final mass-production stable version. Engineering samples are not accepted, nor are ones without a consistency-number label. In 2026 the scrutiny on self-test data authenticity is harsher — the lab will compare your self-test data against the submitted firmware.
For projects of this kind, the tier, interface and cable correspondence is locked before submission; those three mismatches are the top rework source, and clearing them up front saves a whole round.
For products with multiple tiers and multiple cables, BlueAsia's one-stop testing and certification splits the cases by tier, running the broadest-coverage tier first so problems surface early and fixes come faster.
Swapping the fast-charge chip or power device is a major hardware change requiring full retest; moving only software parameters goes through a simplified change filing; changing the enclosure alone does not affect the certificate. The three are handled very differently, so do not budget them all as retests.
Contact: King Email: king.guo@cblueasia.comAddress: Building C, Hongjingda Industrial Park, No. 107 Beihuan Road, Shiyan Street, Bao'an District, Shenzhen, China BlueAsia delivers more than service!
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