MP Filtri · CS / CW Spin-on · return line

CS150A03AP01 filter element: specifications & equivalents

Q: What micron rating does CS150A03AP01 use?

This element is rated 3 µm absolute — β3(c) ≥ 1000 per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

The CS150A03AP01 is a MP Filtri return-line hydraulic filter element, built with inorganic microfiber media, rated at 3 µm absolute (β3(c) ≥ 1000 per ISO 16889). Verify against the current manufacturer data sheet before ordering.

Filtration rating 3 µm abs.

Beta rating β 3(c) ≥ 1000 per ISO 16889

Media Inorganic microfiber

Line type return

Catalog verified. Parameters extracted from the manufacturer’s electronic catalog / official interchange document and checked 2026-09-28. Confidence score 0.90.

Ordering code and media options are taken from the MP Filtri Spin-on catalogue MPS booklet (CAT_HF_SPIN-ON_MPS_EN p.8); multipass Beta(c)=1000 ratings for size 150 are quoted from the US GRF/UFM replacement-element table. US MP Filtri literature lists this cartridge under the CSG prefix and interchange lists also quote leading-zero-dropped and execution-slot-dropped short forms; all are indexed as aliases of this page. The catalogues print overall MPS filter dimensions but no cartridge envelope dimensions, thread or collapse rating; verify against the current MP Filtri data sheet before ordering.

Specification table

Parameter	Value
Filter type	return line
Media	Inorganic microfiber
Filtration rating	3 µm
Rating basis	absolute
Beta ratio	β3(c) ≥ 1000 per ISO 16889
End caps	spin-on cartridge
Integral bypass valve	none (housing/valve-dependent)
Seal material	Nitrile (Buna-N)
Source catalog	MP Filtri: MP Filtri Spin-on Filters catalogue, MPS family booklet (CAT_HF_SPIN-ON_MPS_EN) MP Filtri: MP Filtri GRF / UFM mobile filtration units brochure (US edition, CAT_GRF_UFM__US)
Last verified	2026-09-28

Sources: MP Filtri — MP Filtri Spin-on Filters catalogue, MPS family booklet (CAT_HF_SPIN-ON_MPS_EN) · MP Filtri — MP Filtri GRF / UFM mobile filtration units brochure (US edition, CAT_GRF_UFM__US) — accessed 2026-10-17.

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

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.

Full chart: MP Filtri cross reference chart →

How the CS150A03AP01 model number is decoded

CS150CS replacement cartridge series and size for the MPS150 spin-on filter.
A03Filter media: Inorganic microfiber, 3 µm (absolute rating per ISO 16889). The US catalogue uses the CSG prefix for this cartridge.
ASeals: NBR (nitrile).
P01MP Filtri standard catalogue item execution.

Typical equipment & applications

Tank-mounted return-line hydraulic filters
Hydraulic power units and lubrication systems
Construction and agricultural machinery
Machine tool and industrial hydraulic systems

Selection pitfalls — read before you substitute

Line type is not interchangeable: return-line cartridges are low-collapse executions that typically tolerate roughly 10–20 bar differential, while pressure-line elements are commonly rated 100–210 bar. Installing a low-collapse element in a pressure housing can rupture the media on cold-start spikes.
This element has no integral bypass — opening pressure is set by the housing’s reusable bypass valve. Confirm the valve setting (commonly 3.4 bar) is present before fitting.
“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.
This execution uses nitrile (buna-n) seals — verify the compound against the fluid data sheet: standard nitrile (NBR) can fail early in phosphate-ester fluids and at sustained high temperature, where 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 micron rating does CS150A03AP01 use?

This element is rated 3 µm absolute — β3(c) ≥ 1000 per ISO 16889. Always compare Beta ratings at the same test point: two brands may print different micron numbers for the same physical grade.

What replaces the CS150A03AP01 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 CS150A03AP01 part number?

See the designation decoder above: each segment of CS150A03AP01 encodes size, line type, filtration grade and media/collapse execution.

How often should a hydraulic filter 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.