ElementRef

HYDAC · Betamicron 4 D/DN · pressure line

5.03.18 D 03 BH4 filter element: specifications & equivalents

The 5.03.18 D 03 BH4 is a HYDAC pressure-line hydraulic filter element, built with bh/hc=betamicron® high collapse media, sized 99.1 × 469.9 mm OD × length (ID 40.9 mm), rated at 3 µm absolute (β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)). Verify against the current manufacturer data sheet before ordering.

Envelope OD × L 99.1 × 469.9 mm
Inside diameter 40.9 mm
Filtration rating 3 µm abs.
Beta rating β 3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)
Media BH/HC=Betamicron® High Collapse
Collapse / burst 210 bar
Line type pressure
Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.

HYDAC Betterfit element — dimensions and ratings are taken from catalog.hydac.com. This is HYDAC's drop-in replacement for a Schroeder element; the exact competitor part number is not published on the catalog page. Verify form/fit and micron grade against the competitor data sheet before substituting.

Specification table

ParameterValue
Filter type pressure line
Media BH/HC=Betamicron® High Collapse
Filtration rating 3 µm
Rating basis absolute
Beta ratio β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000)
Outside diameter OD 99.1 mm
Inside diameter ID 40.9 mm
Length 469.9 mm
End caps open-ended cartridge element
Flow direction outside-in
Collapse / burst pressure 210 bar
Integral bypass valve none (housing/valve-dependent)
Seal material Nitrile (Buna-N)
Operating temperature -30 to 100 °C
Source catalog HYDAC Technology Corporation: HYDAC electronic product catalog (catalog.hydac.com)
Last verified2026-09-28

Sources: HYDAC Technology Corporation — HYDAC electronic product catalog (catalog.hydac.com) — accessed 2026-09-29.

HYDAC® and all model designations are trademarks of their respective owners, used here for identification only — ElementRef is an independent reference site, not an authorized HYDAC distributor.

Dimensions & series range

Outside diameter99.1 mm (3.902 in)
Inside diameter40.9 mm (1.610 in)
Overall length469.9 mm (18.500 in)

All 99×470 mm interchange elements →

Cross references & equivalents

No catalog-verified cross references yet. This model is in the manual verification queue — request a verified equivalent.

Interchange levels: full catalog-confirmed drop-in · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the 5.03.18 D 03 BH4 model number is decoded

  • 5.03.18 D 03 BH4HYDAC Betterfit filter element ordering code per catalog.hydac.com. Replaces Schroeder elements.
  • BH/HC=Betamicron® High CollapseFilter media and collapse family as printed in the catalog.
  • 3 µmAbsolute filter rating per the HYDAC catalog.
  • 99.1 mmOutside diameter.
  • 469.9 mmElement length.
  • 210 barElement collapse (differential pressure) rating.
  • Nitrile (Buna-N)Seal compound.

Typical equipment & applications

  • HYDAC Betterfit drop-in replacement for Schroeder hydraulic filter elements
  • Pressure-line filtration for equivalent housings

Selection pitfalls — read before you substitute

  • “10 µm nominal” and “12 µm at β1000” can describe the very same media — one is reported at β≥200, the other at β≥1000 per ISO 16889. Compare ratings at the same Beta test point, not just the printed micron number.
  • Nitrile (NBR) seals are standard for mineral hydraulic oil but fail early in some phosphate-ester fluids and at sustained high temperature; verify seal compound against the fluid data sheet (fluorocarbon/Viton executions may be required).
  • Fine 3 µm media loads faster and runs at a higher cold Δp than coarser grades — only downgrade cleanliness targets if the system ISO 4406 code allows it.
  • End-cap geometry and the number/position of O-rings block interchange even when OD and length match — visually compare end caps before fitting, especially with aftermarket cartridges.

Frequently asked questions

What are the dimensions of the 5.03.18 D 03 BH4 filter element?
The published envelope is 99.1 mm OD × 469.9 mm length with a 40.9 mm inside diameter (3.902 × 18.500 in × 1.610 in ID). Confirm against the housing drawing before ordering.
What micron rating does 5.03.18 D 03 BH4 use?
This element is rated 3 µm absolute — β3 > 1000 (HYDAC grade convention: β5(c) ≥ 1000). Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.
What replaces the 5.03.18 D 03 BH4 filter element?
Cross references are being verified for this model — use the inquiry form and the engineering desk will confirm equivalents.
How do I read the 5.03.18 D 03 BH4 part number?
See the designation decoder above: each segment of 50318D03BH4 encodes size, line type, filtration grade and media/collapse execution.
Is a same-envelope aftermarket element always a drop-in replacement?
No. Matching OD and length only proves the cartridge fits the bowl. End-cap style, seal compound, micron/Beta rating, collapse pressure and bypass configuration must also match; the table above tags every equivalent as full, partial or verify for exactly this reason.
How often should a hydraulic return-line element be replaced?
Replace at the housing manufacturer’s recommended differential-pressure setting (commonly signalled by a clogging indicator), or on a time-based service interval when no indicator is fitted — never wait for bypass to open continuously, because unfiltered oil then reaches the valves.

Same-envelope elements from other brands

View full interchange →

These 59 catalog element(s) share the 99×470 mm envelope. Envelope match alone does not guarantee interchangeability — compare micron/Beta, seals and collapse rating.

HF35543 Fleetguard · 6.8 µm 12.01.18 D 10 XSX /-2.625 HYDAC · 10 µm 4.14.08 D 10 BN4 HYDAC · 10 µm 4.23.18 R 040 BN4 HYDAC · 40 µm 5.03.18 D 01 BN4 HYDAC · 1 µm 5.03.18 D 01 BN4 /-V HYDAC · 1 µm 5.03.18 D 03 BH4 /-EPR HYDAC · 3 µm 5.03.18 D 03 BH4 /-V HYDAC · 3 µm 5.03.18 D 03 BH4 /-V-SFREE HYDAC · 3 µm 5.03.18 D 03 BN4 HYDAC · 3 µm

Other models in the Betamicron 4 D/DN series

All 809 →
0015 D 010 BN4HC 35×42 mm · 10 µm 0030 D 003 BH4HC 36×94 mm · 3 µm 0030 D 003 BH4HC /-V 36×94 mm · 3 µm 0030 D 003 BN4HC 36×94 mm · 3 µm 0030 D 003 BN4HC /-V 36×94 mm · 3 µm 0030 D 005 BH4HC 36×94 mm · 5 µm 0030 D 005 BH4HC /-V 36×94 mm · 5 µm 0030 D 005 BN4HC 36×94 mm · 5 µm 0030 D 010 BH4HC 36×94 mm · 10 µm 0030 D 010 BN4HC 36×94 mm · 10 µm

Reviewed & verified by the ElementRef engineering desk against HYDAC Technology Corporation on 2026-09-28. Read our editorial & correction policy.