Huawei DCDU-12B DC Distribution Unit: Comprehensive Guide for Industrial Automation
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What is the Huawei DCDU-12B?
The DCDU-12B is Huawei's 12-way DC power distribution unit for −48 V telecom and radio sites: one −48 V feed in at up to 160 A (on the two M8 studs under the RT(N+)/NEG(−) cover) and twelve individually breaker-protected load outputs — LOAD0 through LOAD11 — each rated 25 A maximum per the nameplate (the housing print lists 30 A fuse ratings on LOAD0-LOAD9), with 160 A combined. Every way is a hydraulic-magnetic breaker with a padlock eye and a red trip flag, so a faulted radio or router drops out on its own while the other eleven stay up. Huawei part number 02120731, model string TD1MDCDU12B0, made in China at Huawei's Bantian HQ, CE / UKCA / EAC / RCM / CCC marked. This record is three units, new in factory cartons with individual qualification cards — date codes 2023-10-06, 2025-01-06 and 2023-12-15 — 1-month warranty as recorded at intake. All 16 photos and 1 video below show these exact units.
Part details
| Field | Value |
|---|---|
| Model | Huawei DCDU-12B (box label: TD1MDCDU12B0, Part No. 02120731) |
| Type | DC power distribution unit (配电盒 DCDU-12B) |
| Input | −48 V DC, 160 A max — RT(N+) / NEG(−) stud terminals under clear cover |
| Outputs | 12 ways, LOAD0-LOAD11, 25 A max per output (nameplate); 160 A max combined |
| Housing print | FUSE RATING table: LOAD0-LOAD6 30 A, LOAD7 30 A, LOAD8 30 A, LOAD9 30 A |
| Protection | Hydraulic-magnetic breakers per way, padlock eyes, red trip indicators, spare fuse bay under OPEN cover |
| Construction | White sheet-steel channel, honeycomb vent strip, L-bracket mounting flanges |
| Certifications | CE, UKCA, EAC, RCM, CCC, WEEE |
| Origin | Made in China — Huawei Technologies Co., Ltd., Bantian, Longgang, Shenzhen |
| Quantity | 3 units, new in factory cartons; qualification cards 0062170 (2023-10-06), 00112206 (2025-01-06), 0062310 (2023-12-15); 1-month warranty as recorded at intake |
| Shipping weight | 3 kg per unit as recorded |
Values are read from the nameplate, the housing print and the factory labels in the photo set; the 25 A nameplate limit and the 30 A housing fuse print are both shown and noted as printed.
Where the DCDU-12B sits in a site
A modern radio site runs on one −48 V plant — rectifiers and batteries — and everything hung on that plant needs its own protected tap: the baseband unit, each radio, the transmission gear, the routers. The DCDU-12B is that tap made tidy. One pair of studs lands the plant feed, and the twelve breakers hand out individually protected −48 V to twelve loads, each with a padlock eye for a site lockout and a red flag that shows at a glance which way tripped. The hydraulic-magnetic breaker is the telecom-standard choice for a reason: it trips on current, not on the heat ambient cabinets reach, so a warm shelter does not produce nuisance trips while a genuine short still drops the way instantly. The spare fuse bay under the OPEN cover and the clear input cover carrying the wiring instructions make the unit field-serviceable without a manual hunt. Physically it is a channel section meant to bolt to a cabinet wall or a site frame with the L-brackets at each end, the honeycomb vents breathing over the breaker row. The nameplate's 25 A per output is the continuous rating Huawei stands behind, while the housing's 30 A print is the fuse table — sites built to Huawei's own install guides treat the nameplate as the design limit. Three factory-fresh units with three distinct qualification cards are photographed here: mixed date codes, one spares shelf refreshed.
Photos and video
All images below are original KOEED warehouse photos. Click any photo to view it full size.
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