Compatible with Cotag
Cotag-compatible cards & key fobs
Security ID Systems supplies compatible replacement credentials for 3 Cotag formats, encoded by specification to read identically on your existing Cotag equipment. A fraction of OEM pricing — and we are not affiliated with Cotag.
Compatible Cotag formats (3)
Cotag (passive 125 kHz prox)
Compatible with Cotag
- Chip
- T5577
- Format
- ASK + Manchester at very low bitrate / very …
Cotag / Bewator / Granta (active+passive)
Compatible with Cotag
- Chip
- T5577
- Format
- Cotag proprietary ASK+Manchester at very low…
Cotag active 50 kHz (hands-free / Bewator IB928)
Compatible with Cotag
- Chip
- T5577 / EM4305
- Format
- Active battery-powered transponder; the same…
Cotag credentials span
Cotag and all other brand and product names are trademarks of their respective owners. Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, sponsored by, or endorsed by these companies. Brand and format names are used only to identify the systems our products are compatible with. MIFARE and DESFire are registered trademarks of NXP B.V.
Cotag compatibles — common questions
Are these genuine Cotag cards?
No — every credential is an independently manufactured compatible product, not an Cotag-branded one. Security ID Systems is independent and is not affiliated with, authorized by, or endorsed by Cotag. Our cards are engineered by specification to read identically on Cotag readers.
Which Cotag formats can you supply compatibles for?
We currently document 3 compatible Cotag formats, 2 of which are rare formats with no compatible sold elsewhere online. If your exact Cotag format isn't listed, send the part number or a sample — we cover more than we publish.
Will a compatible card work in my existing Cotag system?
Yes, when encoded correctly. We match the frequency, data structure and — where applicable — your facility code and card-number range, so the credential presents exactly what your readers expect. We confirm compatibility before production.
Request a quote
Need a compatible Cotag credential?
Send the part number printed on your card or a photo of the reader. We confirm compatibility before you order — and we cover the specialist formats nobody else lists.