hp 37a vs 37x — same black LaserJet toner for the same printers. The only real difference is page yield (and cost per page).
37A (CF237A) is the standard-yield black — about 11,000 pages. Buy this when you print lightly.
37X (CF237X) is the high-yield black — about 25,000 pages. Same fit. Fewer swaps. Better cost per page if the printer runs often.
| Feature | 37A | 37X |
|---|---|---|
| Black yield | ~11,000 (CF237A) | ~25,000 (CF237X) |
| Best for | Light / occasional | Regular office use |
| Printers | LaserJet Enterprise M607 / M608 / M609; MFP M631 / M632 / M633 | |
Mono black only — there is no 37 color pack. 37Y is a separate ultra-high-yield SKU, not this A vs X decide. Not 26A/26X or 87A/87X. Read the label on the cartridge already in the printer.
We sell a compatible 37A black (CF237A) and a compatible 37X high-yield black (CF237X), chips installed.
When to buy which: replace toner more than a couple of times a year → start with 37X (about 2.3× the pages). Occasional printing → 37A is enough. If the label says 37X, stay on X unless you intentionally want fewer pages per cartridge.
FAQ
What is hp 37a vs 37x in one sentence?
Same M607 / M608 / M609 / M631–M633 printers; 37A is standard yield (~11,000), 37X is high yield (~25,000).
Are 37A and 37X for the same printers?
Yes. Same family. Only the yield changes.
Is there a 37 4-pack?
No. These are single black cartridges only.
What about 37Y?
37Y is a separate ultra-high-yield option. This page is the A vs X decide only.
Does compatible toner void the printer warranty?
Using a non-HP cartridge does not by itself void HP’s limited printer warranty. Damage HP attributes to a non-HP cartridge is a different question.
HP+ / Instant Ink?
Those programs do not accept compatible toner. If you are not sure the printer was never enrolled, ask before you order.
Ready to order: compatible HP 37A or compatible HP 37X.