BM1368PA BM1368PB ASIC Stencil Plate for Antminer S21 T21 Hydro Hashboard
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Antminer BM1368PA BM1368PB ASIC Stencil Plate | Tin Tool for S21, T21, S21 Hydro Hash Board
The BM1368 ASIC stencil plate is the precision reballing fixture for the Antminer S21, T21, S21 Hydro, and S21IMM hashboards. Each of these hashboards hosts 108 BM1368 ASIC chips arranged in 12 voltage domains of 9 chips each with a working domain voltage of approximately 1.2V. A single S21 or T21 miner runs 324 BM1368 chips across 3 hashboards — meaning when chip failures cascade in a fleet, a fast reballing fixture pays for itself in hours.
The stencil is CNC-laser drilled with burr-free tin-plated holes for pin-perfect alignment on the BM1368 BGA pad layout. The high-temperature composite construction handles direct reflow heating without warping, and a single stencil works across the entire BM1368 series — PA, PB, PV, PM, and AA variants — so repair benches don't need a separate fixture per chip revision.
Where the BM1368 Stencil Fits
- Domain-level repair on Antminer S21 / T21 / S21 Hydro / S21IMM — reball the 9 chips in a failed voltage domain.
- S21 Hydro and S21XP Hydro — same BM1368 chip family, same stencil.
- S21IMM (immersion variant) — same chip + footprint as air-cooled S21.
- Multi-variant repair benches — one stencil covers PA, PB, PV, PM, and AA chip silkscreens.
- Chip-level recovery — recover salvageable BM1368 chips from failed boards for reuse.
Construction and Manufacturing
- CNC laser-drilled holes — burr-free, dimensionally consistent across the full pad array.
- Tin-plated mesh — clean solder paste release with minimal residue.
- High-temp composite + tin-steel mesh — survives standard SAC305 reflow profiles without warping.
- 1:1 OEM-spec BM1368 BGA pitch alignment — matches Antminer S21 / T21 / S21 Hydro footprint.
- Stencil plate only — chip holder sold separately.
BM1368 Stencil Plate Specifications
| Feature | Specification |
|---|---|
| Compatible Miners | Antminer S21, T21, S21 Hydro, S21IMM, S21XP Hydro |
| Chip Compatibility | BM1368PA, PB, PV, PM, AA (full series) |
| Chips per Hashboard | 108 (12 domains × 9 chips) |
| Working Domain Voltage | ~1.2V |
| Material | High-Temp Composite + Tin-Steel Mesh |
| Manufacturing | CNC laser-drilled, zero burrs |
| Included Components | Stencil plate only (no holder) |
| Primary Application | ASIC chip reballing & solder repair |
FAQ — BM1368 Stencil Plate
Q: Does this stencil work on S21 Pro / S21+ / S21XP miners?
A: No — S21 Pro / S21+ / S21XP use the newer BM1370 series chip (BB / BC / AA / PA / PB variants), which has a different BGA footprint. For BM1370 reballing you need the BM1370 stencil. The BM1368 stencil is specifically for S21, T21, S21 Hydro, S21IMM, and S21XP Hydro.
Q: How many BM1368 chips per S21 / T21 hashboard?
A: 108 chips per hashboard, arranged in 12 voltage domains of 9 ASICs each. The full S21 or T21 miner runs 324 BM1368 chips across 3 hashboards. Working domain voltage is approximately 1.2V.
Q: Do I need a separate stencil for PA, PB, PV, PM, and AA chips?
A: No — all BM1368 variants share the same BGA footprint. One stencil covers the full series, which simplifies repair-bench inventory.
Q: What rework profile do you recommend?
A: Standard BGA reflow — preheat the board to 100-150°C, ramp to peak around 240-250°C, hold for 30-60 seconds, controlled cooling. Use flux paste and clean residue with isopropyl alcohol before placing the reballed chip.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com for volume pricing on stencil + holder kits.
Related products
- Antminer BM1368PA / PB Tin Tool (S21 / T21 Hydro)
- BM1368PB ASIC Chip (Antminer S21 / T21)
- BM1368AA ASIC Chip (Antminer S21 / T21)
- Antminer S21 / T21 Control Board
Repair benches rebuilding Antminer S21 / T21 / S21 Hydro hashboards in volume? Email contact@lys-sz.com for bulk stencil + holder pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
