OEM SD3 125kHz EM Proximity Fob

OEM SD3 Proximity Token

The OEM SD3 Proximity Fob functions as a passive transponder for physical security systems. It requires no internal power source. The device draws energy from the electromagnetic field generated by the reader. This 125kHz hardware supports standard EM protocol communication. It integrates with most entry-level and enterprise-grade door controllers. The internal antenna consists of a high-quality copper coil. This coil ensures consistent resonance and data transmission stability.

The blue casing consists of reinforced ABS plastic. This material withstands significant mechanical stress. Engineers specify these tokens for environments requiring high durability. The ultrasonic welding process seals the internal components against moisture. It prevents ingress of dust and liquids in outdoor or industrial settings. Consequently, the hardware maintains performance in challenging conditions.

The SD3 utilizes Manchester encoding for data transfer. This method provides reliable clock recovery. It minimizes bit errors during the read cycle. Each transponder carries a pre-programmed 64-bit serial number. This number is unique and non-alterable. It provides a distinct identifier for database management. System administrators can easily map these IDs to user profiles in the access control software.

Deployment of these credentials simplifies credential management for IT staff. The compact form factor attaches easily to standard key rings. This reduces the likelihood of users losing their access tokens. The blue color allows for visual categorization of access levels. System compatibility includes various 125kHz proximity readers. The read range typically spans from 2 to 10 centimeters. This distance depends on the antenna size of the reader hardware. The passive nature of the chip ensures an indefinite operational lifespan. It does not suffer from battery depletion issues.

The operating temperature range extends from -40 to +85 degrees Celsius. This wide thermal tolerance suits deployment in extreme climates. The hardware remains functional in high-humidity environments. The storage temperature matches the operating specifications. This ensures long-term reliability in non-climate-controlled storage areas.

The EM4100 protocol remains a standard in the security industry. It offers a cost-effective alternative to high-frequency smart cards. While it does not support encryption, it provides rapid identification. This makes it suitable for attendance tracking and basic door entry. It works effectively in parking management systems. Procurement managers value the SD3 for its lifecycle longevity. The lack of moving parts reduces mechanical failure rates. The ABS housing resists chemical exposure common in industrial facilities. This hardware provides a stable baseline for security infrastructure.

Key Features

• Frequency Standard
  The device operates at 125kHz to ensure compatibility with legacy and modern EM readers.

• Chassis Durability
  The ultrasonic-welded ABS shell prevents internal component damage from mechanical shock.

• Chipset Specification
  The integrated EM4100 circuit provides a read-only 64-bit serial number for secure identification.

• Environmental Protection

  • IP-rated moisture resistance
  • Operating range from -40°C to +85°C

Specifications

What’s in the Box

• OEM SD3 Blue Proximity Fob

• Steel Split Ring

Why Choose OEM SD3 Token

• High-tensile ABS construction ensures long-term deployment in high-traffic commercial environments.

• Industry-standard EM4100 protocol provides universal compatibility with existing 125kHz reader infrastructure.

• Passive RFID technology eliminates maintenance requirements associated with battery-powered credentials.

• Distinct blue color coding assists in visual identification of specific clearance groups.