> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# 13.56MHz RFID/NFC White Tag - NTAG203 Chip

**Type:** Product page · **SKU:** ADA4033 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/13-56mhz-rfid-nfc-white-tag-ntag203-chip.html ([markdown](https://core-electronics.com.au/13-56mhz-rfid-nfc-white-tag-ntag203-chip.html.md))

This is a blank 13.56MHz RFID/NFC Tag with an NTAG203 chip - often used for train/bus passes, information sharing, contactless payment, but also found in other systems...

## Pricing

- **Price:** $5.20 (inc GST) — $4.73 AUD, exc GST
- **Quantity discounts:** 10+ $4.58 (exc GST) · 50+ $4.49 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 27.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA4033:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA4033:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

Note: Before purchasing you should double check the compatibility with your device. This product was confirmed working with:

Nokia Seven Plus - Android 10

Samsung Galaxy S7 - Android 9

Iphone SE (second gen) - IOS 14.3

This is a blank **13.56MHz RFID/NFC Tag** with an **NTAG203** chip - often used for train/bus passes, information sharing, contactless payment, but also found in other systems where a proximity card is desired. The tag contains a small RFID chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.

These can be read by almost any 13.56MHz RFID/NFC reader, but make sure it can handle ISO/IEC 14443 Type A cards (the standard NTAG uses) as there are a few other encoding standards (like FeLica).

These chips can be written to and store up to 144 bytes of data in writable EEPROM divided into 4 byte banks, and can handle over 10,000 re-writes. You can use our [PN532 NFC/RFID breakout board](https://core-electronics.com.au/pn532-nfc-rfid-controller-breakout-board-v1-3.html) or [Adafruit NFC/RFID Shield for Arduino](https://core-electronics.com.au/adafruit-pn532-nfc-rfid-controller-shield-for-arduino-extras.html) to read and write data to the EEPROM inside the tag. There is also a permanent 7-byte serial number ID burned into the chip that you can use to identify one tag from another - the ID number cannot be changed.

These use an NTAG chipset, a 'Type 2' tag that is usable with any smartphone. Unlike "Classic 1K" cards (a.k.a MiFare S50s), these tags are more secure and work with almost any phone with RFID support since they avoid the patent issues with Mifare, which requires an NXP chipset or license fee.

## Technical Details

RFID chip specification:

- 144 bytes of user r/w memory area, divided in 36 pages (4 bytes each)
- 7 Byte unique identifier burned into the chip
- Operating frequency: 13.56 MHz
 
Tag specification:

- Dimensions: 25mm x 0.9mm
- Works about 4" away from reader
- Android NFC developer info
- Some handy Android NFC Apps that you can use
 
- [NTAG203 Datasheet](https://core-electronics.com.au/attachments/localcontent/P4033_datasheet_NTAG_203_20880861b93.pdf)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/a/d/ada4033-01.jpg)