RFID card

Selecting the right frequency is the most critical technical decision. Low Frequency (LF, 125 kHz) is ideal for basic access control and animal tracking due to its short read range and low interference. High Frequency (HF, 13.56 MHz), including NFC technology, is the standard for secure payments, ticketing, and data exchange, offering moderate security and read distances. Ultra-High Frequency (UHF, 860-960 MHz) is best for logistics and warehouse management where long-range reading (up to 12 meters) and bulk scanning of multiple items are required.

For high-security environments, avoid simple ID chips (like EM4100) which are easily cloned. Instead, specify chips with AES or DESFire encryption (e.g., MIFARE DESFire EV2/EV3). Ensure the supplier can provide unique UID numbers and supports sector encryption where data is protected by custom keys. For financial or government use, verify compliance with ISO/IEC 14443 or ISO/IEC 15693 standards.

Standard cards use PVC, but for high-temperature environments or better durability, request PET or PC (Polycarbonate) materials. To ensure the design doesn't fade, specify offset printing with an overlay (laminate) rather than thermal printing. If the cards are for outdoor use, ensure they have UV protection and an IP67 or IP68 waterproof rating to prevent internal antenna corrosion.

Before placing a bulk order, you must confirm the chip model, protocol, and memory size. Request a pre-production sample to test against your specific RFID readers. It is also vital to confirm the data format (e.g., Wiegand 26, 34, or 50) to ensure the card's output is readable by your software backend.

Implement a strict QC protocol where the supplier must perform a 100% function test using automated frequency testers before shipping. On Made-in-China.com, prioritize Audited Suppliers who provide third-party inspection reports. You should also negotiate a defective rate clause (typically less than 0.5%) and require the supplier to include 1-2% extra buffer stock at no additional cost.

RFID cards are often classified under HS Code 8523.52. Ensure your supplier provides a Certificate of Origin to potentially reduce import tariffs under specific trade agreements. Because these are lightweight but high-value items, Air Express (DHL/FedEx/UPS) is usually the most economical and secure method, providing end-to-end tracking which is essential for sensitive security products.

When providing artwork or encoding data, sign a Non-Disclosure Agreement (NDA). If the cards require pre-encoding or laser-engraving of sensitive sequences, use a secure file transfer protocol. Ensure the supplier is compliant with GDPR if you are importing into Europe, and verify that they do not retain your encryption keys after the production run is complete.

Price is heavily influenced by the chip market fluctuations. Secure a price quote with a validity period of at least 15-30 days. For large-scale projects, leverage staged payments (e.g., 30% deposit, 70% after inspection) to maintain leverage. To reduce lead times, ask if the supplier maintains stock of 'dry inlays', which can significantly speed up the lamination and printing process.