Smartcard J3H145

User-programmable smartcard designed to add low-cost, secure-element–backed storage to your DIY self-custody projects.

Features an NXP J3H145 JavaCard with dual-interface support (contact and NFC), compatible with JavaCardOS 3.0.4. The card is delivered unlocked.
Using the SeedSigner smartcard fork makes it easy to install and manage applets on the card.

To use the card with a PC, a smartcard reader (USB contact or NFC contactless) is required.

NFC is not available for simcard models

Supports applets such as:

• Satochip – Bitcoin, Ethereum, Litecoin hardware wallet

• Seedkeeper – Password manager

• Satodime – Cryptocurrency bearer card

• Specter DIY – Bitcoin DIY hardware wallet