# RFID Card S50 13.56MHz

> RFID Card S50, 13.56MHz, compliant with ISO 14443A standard, compatible with RC522, PN532, HW-126 modules and Arduino, ESP32, STM32 platforms. EEPROM memory 1KB (16 sectors x 4 blocks x 16 bytes), rewritable up to 200,000 cycles, fixed 7 byte UID or 4 byte NUID, supports anticollision. Passive power supply via induction, reading distance up to 100mm. Made of PVC, dimensions 86 x 54 x 0.88mm, moisture resistant.

- Page: https://sigmanortec.ro/en/rfid-card-s50-1356mhz
- Price: 1.96 RON
- Availability: In stock; 1-2 zile
- Reference: 22117 · EAN: 5943349314979
- Category: Electronic components > Access Control > RFID Cards and Tags
- Package (shipping data): 0.006 kg
- Updated: 2026-10-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 02:52 (Europe/Bucharest)

## Description

The 13.56MHz S50 RFID card for access control and identification in projects with Arduino and compatible RFID modules has rewritable memory for up to 200k cycles, a fixed ID that cannot be copied, a reading range of 3-10 cm depending on the reader, is waterproof, thin, and fits easily in a wallet, powered by induction without a battery.
The RFID S50 card is a proximity card that operates at a frequency of 13.56MHz and complies with the ISO 14443A standard, being compatible with a wide range of RFID modules available at this frequency, including RC522, PN532, and HW-126 modules.
It features 1KB of EEPROM memory, organized into 16 sectors of 4 blocks each, with each block having 16 bytes, with access conditions definable per block and two security keys per sector, making it suitable for multi-user applications with hierarchical access. It supports anticollision, allowing multiple cards to operate simultaneously within the field of the same reader module.
All blocks are rewritable up to 200,000 times, except for block 0 in sector 0, which contains the card's unique identifier and cannot be modified.
Authentication is performed using the mutual three-pass protocol according to ISO/IEC DIS 9798-2, and the card supports a 7-byte UID or a 4-byte NUID, with Random ID support for the 7-byte version. Stored data is guaranteed for a retention period of 10 years. Powered passively by electromagnetic induction, it does not require a battery, and the detection distance reaches up to 100mm, depending on the antenna geometry of the reader module.
Transactions are completed in less than 100ms.
Made of PVC, it has the standard dimensions of a bank card (86 x 54 x 0.88mm), can be conveniently stored in a wallet, and is resistant to humidity.
The card is ideal for access control projects, employee cards, or ticketing applications, built with Arduino, ESP32, STM32, or any other platform compatible with RFID modules at 13.56MHz.
Specifications:
Frequency: 13.56MHz
Standard: ISO 14443A
Model: S50
Material: PVC
Memory: 1KB EEPROM, 16 sectors x 4 blocks x 16 bytes
Power supply: Passive, via electromagnetic induction
Detection distance: Up to 100mm (depends on antenna geometry)
Data transfer: 106 kbit/s
Data integrity: 16-bit CRC, parity, bit coding, bit counting
Authentication: Mutual three pass, ISO/IEC DIS 9798-2
Maximum rewrites: 200,000
Data retention: 10 years
Transaction time: Under 100ms
UID: 7 bytes or 4-byte NUID, fixed, cannot be modified
Random ID support: Yes (7-byte UID version)
Anticollision: Yes
Security: 2 individual keys per sector
Block 0, Sector 0: Protected, contains the unique UID, cannot be modified
Operating temperature: -20 to +60°C
Storage temperature: -20 to +65°C
Dimensions: 86 x 54 x 0.88mm