OKI MB770dfn MB770dn Toner Cartridges
Your OKI MB770dfn and MB770dn printers use the OKI 45488903 and 45439003 toner cartridge series along with 45435104 fuser units. Upgrading from the 25,000-page 45488903 toner to the 36,000-page 45439003 cartridge significantly lowers running costs during heavy print runs. Our 4.8 Google rating reflects a long-standing track record of premium cartridge performance.
Expected page output and toner life
Page yields for OKI Black cartridges are measured according to ISO/IEC 19752 testing standards for monochrome laser output. Selecting higher-capacity options reduces cartridge swap frequency during large document production cycles in fast-paced corporate settings.
| Cartridge Number | Type | Colour | Page Yield | Cost Per Page |
|---|---|---|---|---|
| 45488903 | Standard | Black | 25,000 | $0.052 |
| 45439003 | High Yield | Black | 36,000 | $0.039 |
Cost Per Page = Total Cartridge Price ÷ Page Yield (at 5% coverage). Prices based on Genuine cartridges.
Fuser units and long-life components
The OKI MB770 series relies on the 45435104 fuser unit to permanently bond Black toner to paper under heat and pressure. Experience Tip: Rated for up to 200,000 pages, the 45435104 fuser unit outlasts multiple toner cartridge replacements, ensuring long-term document durability.
Managing your enterprise toner supplies
For high-volume office environments outputting text documents daily, choosing the 36,000-page 45439003 toner offers the best long-term efficiency. All orders qualify for hassle-free purchasing supported by our clear Returns policy. Free delivery applies on all orders over $99, dispatched quickly from warehouses in Perth, Brisbane, Sydney, Melbourne and Adelaide. Explore our full range of OKI toner cartridges to keep your office operating smoothly.
Enterprise toner tip
Always check your average monthly print volume before ordering; switching from the 45488903 (25,000 pages) to the 45439003 (36,000 pages) cartridge cuts replacement frequency by over thirty percent in busy departments.
Frequently Asked Questions
Do the OKI MB770dfn and MB770dn use the exact same toner cartridges?
Yes, both the MB770dfn and MB770dn share identical consumable specifications and use the 45488903 and 45439003 Black toner cartridges interchangeably.
Can I install the 36,000-page 45439003 toner cartridge in a standard MB770dn printer?
Yes, the 45439003 high-capacity toner cartridge uses the exact physical slot dimensions as the standard 25,000-page 45488903 cartridge, fitting seamlessly into both MB770dfn and MB770dn models.
How often does the 45435104 fuser unit need to be replaced compared to toner cartridges?
The 45435104 fuser unit has an operational rating of approximately 200,000 pages, meaning it typically requires replacement only after depleting five to eight high-yield toner cartridges.
How does ISO/IEC 19752 testing impact actual toner page yield in standard office use?
ISO/IEC 19752 measures yield based on five percent page coverage; printing dense text, tables, or continuous heavy-coverage graphics will deplete toner faster than the standard laboratory estimate.
