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RFID Key fobs with a MIFARE Classic® EV1 4 Kb chip
(Product ID: 3578)

MIFARE Classic® EV1 4 Kb chip
These RFID key fobs contain the MIFARE Classic® EV1 chip with 4 KB memory and are suitable for applications that require more memory than standard MIFARE Classic® key fobs with a basic 1 KB memory.

They are suitable for use with access control devices, time attendance registration, and with readers operating at a frequency of 13.56 MHz and supporting the ISO14443A protocol.

We have some color variations in stock, other colors are available upon request.

We also offer printing on key fobs and personalization services. We can print your logo, sequential number, or ID number programmed into the chip.

If you need larger quantities send an email to info@rfidspecialist.eu or call +386 41 884 124 and we will be happy to help you.

If you are an integrator or reseller, we offer special discounts.
Price/item: 2,19 EUR (with vat 2,67 EUR)
Status: In stock
Dispatching time: 1-3 days

Keyfobs Colour:


Product ID: 3578


You can order from 1 piece onwards. Enter the desired quantity, and the price for the selected quantity will be displayed.
218,60 EUR

Total with vat:
266,69 EUR
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Quantity Price/pcs
≥ 1 2,44 EUR
≥ 10 2,38 EUR
≥ 25 2,31 EUR
≥ 50 2,25 EUR
≥ 100 2,19 EUR
≥ 200 2,12 EUR
≥ 300 2,06 EUR
≥ 500 1,99 EUR
≥ 1000 1,93 EUR
≥ 2000 1,80 EUR


RFID key fobs with MIFARE Classic® chip are popular RFID tags for door access, time attendance recording, and various other user identification purposes.

This version of the MIFARE Classic® chip has 4 KB memory and a 4-byte programmed ID code.

If you are looking for standard MIFARE key fobs with 1 KB memory, please visit the following page:

RFID Key fobs with a MIFARE Classic EV1 1k chip

If you are looking for cheaper chips with compatible chips, check out these:

RFID Key fobs with a 13.56 MHz F08 1k chip

Compared to tags with Mifare-compatible chips, the tags with the original MIFARE Classic® EV1 chip have the following advantages:

Longer reading distance (Mave test: 3.5 cm for original vs. 1.5 cm for compatible)
- Better performance in challenging environments (e.g., industry)
- 2x longer chip lifespan (200,000 cycles instead of 100,000 cycles)

The market is flooded with RFID tags that look very similar, but often they are cheap counterfeits with inferior antenna and poor housing (e.g., caps falling off, etc.).

The authenticity of MIFARE Classic® EV1 chips can be verified using the NXP TagInfo mobile application or special equipment.

Technical specifications for RFID Key fobs with a MIFARE Classic® EV1 4K chip

Chip: MIFARE Classic® EV1, 4 KB memory, 4-byte NUID
Chip manufacturer: NXP Semiconductors
Function: Read/Write
Memory: 4 KB
RF protocol: ISO14443A
Operating frequency: 13.56 MHz
Reading distance: up to 5 cm (depending on the reader)
Dimensions: 30 mm x 37 mm x 7 mm
Housing material: ABS
IP classification: IP66
These key fobs are not suitable for cloning other RFID tags, and the unique ID code cannot be reprogrammed.

Official technical documentation for MIFARE Classic® chips is available here:

Options for printing and personalization of RFID key fobs:

We can print the RFID key fobs with your logo or serial number. The detailed description of personalization is available here: https://rfidspecialist.eu/store/printing-of-rfid-key-fobs-with-serial-number-id-code-or-logo.html

If you need larger quantities send an email to info@rfidspecialist.eu or call +386 41 884 124 and we will be happy to help you.

If you are an integrator or reseller, we offer special discounts.

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