---
tags: [project-drogheda, bom, sourcing, hardware]
project: Project Drogheda
author: Helgen CTO
date: 2026-06-20
status: Active
---

# BOM Maestro — HBOX + Gabinete (24 V)

> Updated master BOM for the **24 V** Drogheda unit (the dominant ICAVE variant).
> Costs in **MXN**, from `Selección de componentes para gabinete2.xlsx` and the
> H-BOX BOM sheet. This supersedes the older loose BOM. For 12/48/110/230 V
> variants only the cabinet power/protection parts change (see source sheet).

> **Why this exists:** the earlier BOM drifted from reality. This pins the **as-built**
> parts (so diagnosis/PCB work targets the right hardware) and flags the
> **change-list** for the production fix.

## 1. HBOX — internal unit (per unit, 24 V)

| # | Item | Marca / Modelo | Qty | MXN | Notes |
|---|---|---|---:|---:|---|
| 1 | H-BOX Case | Helgen Series1 (**ASA print**) | 1 | 100 | UV-stable, ~95–100 °C — adequate |
| 2 | H-BOX Top | Helgen Series1 (**ASA**) | 1 | 50 | |
| 3 | DC PSU bracket | Helgen Series1 (ASA) | 1 | 20 | |
| 4 | Battery Case | Helgen Series1 (ASA) | 1 | 30 | houses 18650 |
| 5 | SIM | Telcel micro | 1 | 100 | per-unit data plan |
| 6 | **GNSS RTK** | Ardusimple simpleRTK2B **Pro** (AS-RTK2B-PROF9P-L1L2-NH-00) | 1 | 3,340 | ZED-F9P |
| 7 | **4G/NTRIP** | Ardusimple 4G NTRIP Master (AS-XBEE-4G-NA-UFL-00) | 1 | 2,440 | XBee LTE |
| 8 | **MCU watchdog** | DFRobot STM32F411 Blackpill | 1 | 104 | runs `blackpillrtkcode_v2` |
| 9 | GNSS antenna | Ardusimple AS-ANT2B-ANN-L1L2-50SMA | 1 | 700 | multiband |
| 10 | LTE antenna | Unit Electronics AR1582 (SMA→IPEX) | 2 | 42 | 4G diversity |
| 11 | Headers F 6/8/10-pin | 2.54 mm | 1ea | 10 | board interconnect |
| 12 | **5 V supply** | **Mean Well SD-15B-05** (18–36 V→5 V, 3 A) | 1 | 300 | ✅ industrial — keep |
| 13 | Boost / charger | Adafruit **PowerBoost 1000C** (2465) | 1 | 400 | battery path — review |
| 14 | **Ignition cond.** | DFRobot **DFR1015** buck | 1 | 106 | 24 V ign → Blackpill PA5 |
| 15 | **Battery** | Hyvel **18650 1S4P** (FG-0889, 3.6 V) | 1 | 204 | ⚠ charge ≤45 °C — decide |
| 16 | Status LED + holder | Steren 5 mm + bezel | 1 | 3 | PB0 path |
| 17 | Resistor | 1.5 kΩ (use TBC — see watchdog-schematic) | 1 | 1 | verify value |
| 18 | **HBOX↔cabinet** | **GX16-5** macho/hembra | 1 | 22 | ✅ locking — keep |
| 19 | Watchdog discretes | 2N3904, IRF9540N, 2N7000, R (1k/10k/220Ω) | — | — | → consolidate on PCB |
| 20 | Dupont terminals | red + black | 2 | 4 | ⚠ vibration — eliminate |
| 21 | Wire, glands, screws, label, switch | genérico / Steren | — | ~110 | NPT 3/8 gland |
| | **HBOX subtotal** | | | **≈ 8,041** | |

## 2. Gabinete — cabinet (per unit, 24 V)

| Item | Marca / Modelo | Qty | MXN |
|---|---|---:|---:|
| Enclosure IP67 (ABS) | Yetlebox **P3901** (39×29×16) | 1 | 1,435 |
| DIN rail | Weidmüller TS 35×7.5 | 1 | 50 |
| Neutral terminals | Weidmüller WDU 2.5 | 5 | 58 |
| Ground terminals | Weidmüller WPE4 | 4 | 154 |
| Fuse-holder terminal | Phoenix **PT 6-FSI/C** (3212166) | 3 | 900 |
| End stops | Wago 249-116 | 4 | 56 |
| Ignition SSR | Weidmüller **TOS 24VDC 2A** | 1 | 684 |
| Surge (SPD) | Phoenix **TTC-6-TVSD-C-24DC-PT-I** | 2 | 1,076 |
| Breaker | Phoenix **TMC 81C 05A** | 1 | 484 |
| **Supply → 24 V** | Mean Well **DDR-60G-24** | 1 | 748 |
| Fuse (blade) | automotriz **2 A** | 3 | 6 |
| Cable / ferrules / glands / labels | Indiana / Weidmüller / Helgen | — | ~110 |
| Shipping to port | — | 1 | 600 |
| **Cabinet subtotal** | | | **≈ 6,365** |

**≈ Total per 24 V unit: ~14,400 MXN** (HBOX ~8,041 + cabinet ~6,365). An
alternate supplier ("Israel" column in the sheet) shows ~1,284 MXN/cabinet
savings at 24 V — sourcing decision lives here in `09_`.

## 3. ✅ What's already good (don't re-buy / don't duplicate)

- **Cabinet** is industrial-grade: SPD + breaker + isolated SSR ignition + Mean
  Well 24 V. The HBOX needn't re-implement input surge/protection.
- **SD-15B-05** (24→5 V, 3 A) is a real industrial supply — keep.
- **GX16-5** locking HBOX↔cabinet connector — keep (good vibration practice).

## 4. ⚠ Change-list for the production fix (feeds the PCB + hackathon)

| Change | From → To | Why | Ref |
|---|---|---|---|
| Inner case | **ASA — keep** (adequate); optional metal / plate-mount | conduction, not material, is the lever | RCA, hardware-brief §2b |
| Internal wiring | **Dupont/hand-wire → PCB + locking connectors** | vibration intermittents | hardware-brief §4 |
| Battery path | **PowerBoost 1000C + 18650 → decide:** drop / LiFePO4 / supercap | heat + safety; do we need parked tracking? | hardware-brief §6.1 |
| Fuse | **verify the 2 A blade** vs measured worst-case + inrush | client's "under-rated fuse" | RCA H5 |
| Watchdog discretes | **2N3904/IRF9540N/pull-ups → integrated load switch on PCB** | fewer parts, defined turn-on | hardware-brief §4 |
| SIM | micro-SIM buried → **front-panel SIM or MFF2 eSIM** | maintainability | hardware-brief §6.2 |
| Thermal | **conduct heat to metal plate / sunshade; NO internal fan** | sealed-box physics | hardware-brief §2b |

## Open Questions

- [ ] Confirm the **installed blade-fuse value** (2 A may be under-rated for LTE inrush).
- [ ] Battery decision (drop vs LiFePO4 vs supercap) — blocks the PCB power section.
- [ ] Lock supplier per line (Helgen vs alternate quote) for the August batch.

## Related

- [[CLAUDE|Master Index]] · [[03-Architecture-Hardware/cabinet-electrical-bom|Cabinet BOM detail]] ·
  [[03-Architecture-Hardware/hardware-respec-and-pcb-brief|Hardware re-spec + PCB brief]] ·
  [[03-Architecture-Hardware/watchdog-schematic|Watchdog schematic]]