D1G133AB3922 DC48V 105W Inverter Cooling Fan - Complete Technical Guide

D1G133AB3922 DC48V 105W Inverter Cooling Fan - Complete Technical Guide

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What is the ebm-papst D1G133-AB39-22?

The D1G133-AB39-22 is a DC-powered centrifugal blower from ebm-papst — a 133-class silver-steel scroll unit built for inverter and drive-cabinet cooling: 48 V DC nominal input across a 36-57 V window, 105 W draw, 1,780 min⁻¹ nominal speed, with the M1G074-BF motor at its heart and "Made in Germany" on the label. Air enters through the round finger-guarded eye, the backward-curved impeller throws it outward, and the rectangular discharge port hands it to the duct or heatsink below. The four-colour lead (red, blue, white, yellow into a 4-pin connector) carries power plus the control/signal pair this class of blower provides. The photo set covers four units across two production batches — date codes 41/12 (2012) and 25/22 (2022) — all new, Germany-built, with a 1-year warranty as recorded at intake. All 25 photos and 2 videos below show these exact units.

4 min readContent reviewed

Part details

D1G133-AB39-22, as printed on the ebm-papst label
Field Value
Model ebm-papst D1G133-AB39-22
Type DC centrifugal blower, scroll housing with rectangular discharge
Supply 48 V-(36-57 V-)DC — wide-input window
Power 105 W
Speed 1780 min⁻¹
Motor M1G074-BF (marking on the motor plate; cUL US file M1G074-BF)
Connection 4-wire lead (red/blue/white/yellow) to a white 4-pin connector
Construction Steel scroll, finger-guarded inlet eye, metal carry handle, anti-vibration feet
Certification cUL US recognized
Origin Made in Germany
Date codes 41/12 (2012 week 41) and 25/22 (2022 week 25) across the set
Quantity 4 units shown in the photo set, new; 1-year warranty as recorded at intake
Shipping weight 3 kg per unit as recorded
Scroll sideways to see the full table.

Every value above is read from the ebm-papst labels and the motor plate in the photo set.

Why inverter cabinets specify this blower

A large drive or UPS cabinet does not cool like a PC: the heatsinks sit deep behind filters, the airflow path is long, and a plain axial fan loses its nerve against that back-pressure. A forward-scroll centrifugal blower is the answer — the motor sits in the centre, the backward-curved impeller builds pressure radially, and the rectangular volute discharge feeds the duct at a useful static pressure. That is the architecture of the D1G133-AB39-22, and the 48 V DC wide window (36-57 V) is what makes it an inverter-native part: it hangs straight off the DC bus or battery rail of a telecom rectifier or drive intermediate circuit, riding through the sag a 24 V fan would choke on. The 105 W draw and 1,780 min⁻¹ speed place it in ebm-papst's mid-size DC class — enough airflow for a full drive bay, quiet enough for a populated room. The four-wire loom is worth respecting at replacement time: power comes in on two conductors and the remaining pair returns speed/signal information the host system may supervise, so swapping a four-wire unit with a two-wire look-alike silences the alarm but blinds the controller. The build details in the photos are ebm-papst signatures — the finger-guarded eye, the folded steel carry handle that doubles as a mounting stay, the anti-vibration feet under the scroll — and the cUL US recognition covers the compliance file for cabinet builders on both sides of the Atlantic.

Photos and video

All images below are original KOEED warehouse photos. Click any photo to view it full size.

Motor plate from inlet
Looking into the inlet eye: the M1G074-BF motor plate with its fasteners, the backward-curved impeller ring around it, and the power lead exiting through the grommet.
Four-wire loom and plug
The four-wire loom — red, blue, white and yellow conductors inside the black sleeve — ending in the white 4-pin connector against the scroll body.
Scroll side with label
The scroll in profile: rolled silver steel, the ebm-papst label (D1G133-AB39-22, 48VDC, 105 W) on the mounting flange, and the lead exiting the shell.
Loom over discharge box
Second unit, same loom: the four conductors and white plug over the rectangular discharge housing — the pair of boxes that ship together.
4-pin connector face
The 4-pin connector face-on: four brass contacts in the white housing — power pair plus the signal/speed pair.
Blower with discharge grille
The complete assembly: scroll on the left, finger-guarded rectangular discharge on the right, anti-vibration feet under the base — the air path from eye to grille in one frame.
Inlet eye three-spoke guard
The inlet eye from the front: three-spoke guard ring, the impeller behind it, and the mounting bracket bolted at the side.
Two units stacked, 41/12 labels
Two units of the 2012 batch stacked: both labels read D1G133-AB39-22, 48V-(36-57V-)DC, 105 W, 1780 min⁻¹, cUL US *M1G074-BF, Made in Germany, date code 41/12.
Rear quarter view
Rear quarter: the scroll curve into the discharge chute, the grommeted lead and the white plug waiting at the bottom right.
Eye and discharge together
The two working openings in one view: the round eye where air enters, the dark rectangular discharge where it leaves — with the mounting hardware between.
Side profile full height
Full-height side profile: scroll barrel above, discharge duct below, the anti-vibration foot and the lead with its strain-relief loop.
Unit with labels front
Assembled front with both labels legible: D1G133-AB39-22, 48V-(36-57V-)DC, 105 W, 1780 min⁻¹, cUL US, Made in Germany — and the top mounting plate with its hanger tabs.
Impeller through eye
Straight into the eye: the backward-curved impeller blades ringing the motor plate, the carry handle crossing the frame.
Top scroll and open discharge
Over the top: the scroll's reinforcing ribs along the barrel and the open discharge box below with the white 4-pin plug at its edge.
Eye and mounting plate
The eye with its three-spoke guard, and the slotted mounting plate screwed to the scroll flank — the brackets that land the unit on the cabinet wall.
Blank scroll quarter
The blank quarter of the scroll: smooth rolled steel, the folded seam and the discharge flange below — no label side.
Unit on foam, plain side
A unit at rest on its foam bed: bare scroll, lead curled to the corner — warehouse condition as received.
Motor plate marking close
The motor plate in close-up: the M1G074-BF marking legible between the screws — the same motor designation as the cUL file on the label.
Scroll rear with plug
Rear of the scroll with the white 4-pin connector resting against the foam — lead length as delivered.
Eye front with guard spokes
Front of the eye again on the second unit: guard spokes, impeller, and the lead clipped at the frame edge.
Motor plate depth marking
The motor plate from above: the "Depth of ... max. 8mm" casting note around the hub, the 4-pin plug in the foreground.
Label 25/22 close-up
The 2022-batch label in close-up: D1G133-AB39-22, 48V-(36-57V-)DC, 105 W, 1780 min⁻¹, both QR codes, cUL US *M1G074-BF, Made in Germany, date code 25/22.
Factory boxes opened
The factory cartons opened: each blower bagged and cradled in foam inside its own box — two boxes, two units, as shipped from Germany.
Two 25/22 units stacked
The 2022 pair stacked: upper blower on its discharge box, both labels reading 25/22 with matching QR serials — the fresher build of the two batches.
Hand holding loom
The loom held to the camera: four colour-coded conductors (red, blue, white, yellow) leaving the black sleeve into the white plug — the wiring a replacement must match.
Inspection video, part 1: the blower as it was checked at the KOEED warehouse.
Inspection video, part 2: labels and inlet eye in close pass.

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