The Component Signal · Issue #16
The Component Signal #016 — DRAM +23% Again as Best Buy Hoards, and the 600V MOSFET at 37 mΩ
Retailers build memory inventory into a 12-18 week lead-time wall, the Pentagon blacklist reversal reshuffles the supply base, and we examine a 600V SiC MOSFET's RDS(on) economics and integrated shielding.
By Mike Kwak, Director · POCONS USA · How we report
The Signal
When a consumer retailer starts buying DRAM like a hedge fund, the shortage has left the fab and reached the shelf.
This issue's signal is behavioral: tier-1 retailers — HP, Best Buy — are building memory inventory aggressively, the kind of forward-buying normally seen only inside the OEM tier. When the demand for buffer stock propagates all the way to the retail channel, the market has priced in a prolonged shortage.
Supply Chain
DRAM contract pricing took another ~23% step, with lead times stretched to 12–18+ weeks and some commodity grades beyond that. The retailer inventory builds are a bet that this persists through Q3.
The arithmetic underneath: HBM is sold out through 2026; Q1 commodity DRAM ran +95%, Q2 forecast +58–63%. A 23% intra-quarter move is consistent with that trajectory — it is the curve, not a spike. Buyers without locked LTAs are now structurally short.
Hoarding DRAM has a real cost: silver at $75.67/oz, copper at $13,335/t, and elevated carrying costs make a large memory buffer an expensive insurance policy. The discipline is to hedge the BOM lines that will actually go on allocation — not the whole catalog. Match buffer depth to lead-time variance, part by part.
Korean Intel
The leading Korean memory makers are ramping commodity output an estimated 8–12% to capture volume, while simultaneously facing renewed price pressure as partially-rehabilitated Chinese suppliers re-enter under the Pentagon exemption. The Korean majors are walking a line: ramp enough to hold share, not so much that they break the HBM-driven pricing power that is funding the whole capex cycle.
Technical
The 600V MOSFET, decoded. A new 600V-class power MOSFET is drawing attention at 37 mΩ R_DS(on) and a $5.58 unit price — quoted as a ~15% efficiency gain. Here is what those numbers mean.
R_DS(on) is the on-state drain-source resistance; conduction loss is P_cond = I²·R_DS(on)·D, where D is the duty cycle. Dropping R_DS(on) attacks the I² term directly — in a 20 A automotive DC-DC leg, shaving R_DS(on) is the difference between needing a heatsink and not.
The EMC angle is the integrated shielding. A fast 600V switching node is a dv/dt aggressor — edge rates of 20–50 V/ns radiate broadband and couple capacitively into every nearby net. A device with integrated shielding (a grounded Faraday structure inside the package, or a shielded-gate trench) reduces the C_gd Miller capacitance and contains the switching-node field at the source. That is EMC mitigation moved upstream into the component — less work for the board-level shield, lower system cost.
GlobalFoundries–Renesas. The two are expanding capacity outside Taiwan — a geographic-resilience play on mature-node analog and power, the parts that quietly gate every automotive program.
One Thing
The shortage's signature in 2026 is not the fab — it is the propagation. When a retailer hoards DRAM and an OEM hoards 600V MOSFETs, every link in the chain is pricing in scarcity simultaneously. That synchronization is what makes this cycle different from a normal allocation: there is no slack anywhere to absorb the next shock.
POCONS USA — EMI shields + components. San Diego, CA. Products manufactured in Korea (IATF 16949).