JP-7941M3 RFID Read Module 13.56MHz HF 3.3‑5.5V, Max 5cm Reading Distance for

Product Specification

JP-7941M3 Card Reader Module

Product Overview

     The JP-7941M3 Card Reader Module is a highly integrated 13.56MHz RFID/NFC reader module supporting ISO/IEC 14443 Type-A standard cards, including S50, S70, FM11RF08, UltraLight, Ntag, and FM1208. Built around an advanced read-write RF base station with a built-in watchdog and integrated antenna design, this module offers comprehensive command-based card operations — automatic detection, read, write, e-wallet initialization, value increment, value decrement, and balance inquiry — enabling straightforward card management without complex protocol implementation. The module provides flexible UART and RS232 serial interfaces, operates from 3.3V to 5.5V with peak current under 60mA, and delivers a read range of up to 5cm. Housed in an ultra-compact 47mm × 26mm DIP form factor with integrated antenna and rated for -30°C to 70°C operation, the JP-7941M3 is the ideal choice for access control terminals, smart payment systems, time attendance devices, and identity verification kiosks.

Key Advantages

• Comprehensive Command-Based Card Operations: Built-in command set supports automatic card detection, read, write, e-wallet initialization, value increment, value decrement, and balance inquiry — enabling direct, host-free card management without complex protocol stack implementation.

• All-in-One Integrated Antenna Design: Antenna is integrated into the module — no external antenna design, no tuning, no matching circuit development. Plug-and-play integration that reduces design time and engineering effort.

• Integrated Watchdog: Built-in hardware watchdog prevents system lock-ups — ensuring continuous, reliable operation in mission-critical access control and payment applications where downtime is unacceptable.

• Ultra-Compact DIP Form Factor: 47mm × 26mm DIP package — one of the smallest integrated-antenna reader modules available, fitting easily into slim readers, keypads, and space-constrained devices.

• Wide-Range Power Supply: Operates from 3.3V to 5.5V — compatible with both 3.3V embedded systems and 5V legacy controllers without level shifting or separate regulators.

• Extreme Temperature Tolerance: -30°C to 70°C operation — suitable for outdoor access control in freezing climates, hot industrial facilities, and installations without climate control.

Why Choose This Module?

• Integrated Antenna and Watchdog — Plug and Play Reliability: The all-in-one antenna design eliminates the need for external antenna tuning, matching circuits, and RF layout expertise — common difficulties with raw reader chips. This dramatically reduces design complexity and PCB area, and ensures consistent read performance across production batches. Combined with the built-in hardware watchdog, the JP-7941M3 is engineered for reliable 24/7 operation in critical deployments — automatically recovering from communication errors or temporary system hangs.

• Built-In E-Wallet Commands for Payment Applications: Unlike basic reader modules that only provide raw card UID, the JP-7941M3 includes high-level e-wallet commands — value initialization, increment, decrement, and balance inquiry. This means developers can implement stored-value applications (such as canteen payments, laundry services, or transit cards) directly without writing complex crypto or memory management code. The built-in command set reduces development time, minimizes firmware bugs, and accelerates time-to-market for payment and access control products with stored-value requirements.

• Ultra-Compact Form Factor for Slim Designs: At just 47mm × 26mm, the JP-7941M3 is among the smallest integrated-antenna reader modules available. This enables industrial designers to create slim-profile products — modern access readers, flush-mount keypads, and compact terminals — without sacrificing read performance, antenna integration, or temperature tolerance. The DIP package also simplifies assembly and reduces manufacturing complexity.

• Wide Voltage and Temperature Tolerance: The 3.3V–5.5V input range accommodates both modern 3.3V embedded processors and legacy 5V systems, allowing OEMs to standardize on one module across product lines without separate power designs. The -30°C to 70°C operating range ensures reliable deployment in extreme environments — from outdoor access control in freezing northern climates to high-temperature industrial facilities — where standard 0°C to 50°C modules would fail. The wide voltage tolerance means no level shifters or separate regulators, simplifying BOM management and reducing integration issues.

• Government and Enterprise Ready: With support for FM1208 and ISO14443 Type-A cards, the JP-7941M3 is suitable for government and enterprise identity verification systems. Combined with e-wallet functionality and built-in watchdog reliability, this module is ready for public sector, healthcare, financial, and corporate applications where secure, reliable card reading is a requirement.