If you're ordering NFC tags and don't know which chip to pick, you're not alone β the NTAG21x family looks almost identical on paper. Here's the practical difference, with the actual decision logic we use when helping customers choose.
The Short Answer
NTAG215 is the safe default. It has enough memory for business cards, larger URLs, and most automation payloads, at a price only marginally above the NTAG213. Choose the NTAG213 only when you're writing very short data and buying in the millions. Choose the NTAG216 when you genuinely need the space.
Side-by-Side Comparison
| Chip | Total Memory | Usable NDEF | Rough Price Index | Best For |
|---|---|---|---|---|
| NTAG213 | 144 bytes | ~130 bytes | 1.0Γ | Short URLs, simple triggers, highest-volume orders |
| NTAG215MOST POPULAR | 504 bytes | ~480 bytes | 1.1Γ | Business cards, vCard, most projects |
| NTAG216 | 888 bytes | ~860 bytes | 1.5β1.8Γ | Large records, multi-link apps, big vCards with photos |
Memory Math: What Actually Fits
The usable NDEF space determines what you can write. A few worked examples:
- Short URL (e.g.,
https://clrfid.comβ 20β60 bytes): fits on all three chips. - Typical vCard (name, phone, email, title, company β 250β350 bytes): fits on NTAG215 and NTAG216, too big for NTAG213.
- WiFi payload (SSID + password + encryption β 80β120 bytes): fits on all three, but tight on NTAG213 with long passwords.
- Full vCard with photo or multiple URLs (600β800 bytes): NTAG216 only.
Does Chip Choice Affect Phone Compatibility?
No β all three are ISO/IEC 14443 Type A at 13.56 MHz, read by every NFC-enabled Android phone and iPhone 7 or later. The choice is purely about memory and unit cost.
One Compatibility Trap to Avoid
If your application requires tags to be locked (permanently read-only) after encoding, note that locking is one-way. Always test encoding and reading on your final chip before locking a batch.
Cost-Optimized Alternatives
NT21x-compatible chips from domestic manufacturers (e.g., Fudan) perform the same function at a lower cost for large-volume projects. If price-per-tag is critical above ~500K units, ask us about compatible alternatives β we'll quote them transparently with the actual chip model listed.
Decision Summary
- Millions of tags, short URLs β NTAG213
- Anything involving contact sharing, business cards, or automation β NTAG215
- Large records, photos in vCards, multi-function apps β NTAG216
- Unsure? β Start with NTAG215; it's the industry default for a reason.
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