125kHz HID RFID Proximity Card 26/37-Bit Rewritable PVC
125kHz HID RFID Proximity Card 26/37-Bit Rewritable PVC
125kHz HID RFID Proximity Card — 26/37-Bit Rewritable PVC Access Control Card
Upgrade your access control system with this professional-grade 125kHz HID RFID Proximity Card. Available in both 26-bit (H10301) and 37-bit (H10302) formats, these rewritable PVC cards offer reliable, long-range contactless identification for offices, apartment buildings, parking facilities, and more. Built with a genuine HID chip and durable ABS/PVC construction, each card is engineered for consistent, dependable performance.
Please Note: The HID cards sold in this store do not include any "HID" logo on the card face.
Key Features
- Dual Format Support: Choose from 26-bit (H10301) or 37-bit (H10302) format to match your existing access control system
- 125kHz Operating Frequency: Industry-standard low-frequency RFID for broad compatibility with HID card readers
- Rewritable Design: Cards can be reprogrammed, making them ideal for evolving security environments
- Long Data Retention: Stores credential data for 10+ years without battery or power source
- Reading Distance: Effective sensing range of 2.5 cm to 10 cm for fast, convenient tap access
- Durable PVC Construction: Standard credit-card size (85.5 × 54 mm) in two thickness options — 0.76 mm (thin) and 1.8 mm (thick)
- Wide Temperature Range: Operates reliably from -10°C to +50°C for indoor and outdoor use
- No High-Concern Chemicals: Free from hazardous materials
Understanding HID Card Formats
26-Bit Format (H10301)
The 26-bit format is the industry-standard open format, compatible with the vast majority of access control panels on the market. It supports up to 255 facility codes (address numbers) and up to 65,535 unique card numbers per facility code. Because this is an open format, it can be ordered freely and used across a wide range of access control boards — making it the most flexible and universally compatible option.
37-Bit Format (H10302) — Without Facility Code
HID's proprietary 37-bit format was developed to provide an open format with a much larger, non-repeating card number range. HID controls the issuance of card numbers in this format to prevent duplication. Note: Not all access control systems support 37-bit formats or formats without a facility code — verify system compatibility before ordering.
37-Bit Format with Facility Code (H10304)
This variant adds a facility (address) code to the 37-bit format, offering up to 65,535 facility codes with more than 500,000 card numbers per facility code (maximum 524,287). As with the standard 37-bit format, system compatibility should be confirmed prior to ordering, as some systems cannot process large-format card numbers or high-range facility codes.
Technical Specifications
| Chip Type | HID Chip (ABS) |
| Frequency | 125 kHz |
| Formats Supported | 26-bit (H10301), 37-bit (H10302) |
| Card Dimensions | 85.5 × 54 mm |
| Thickness Options | 0.76 mm (thin) / 1.8 mm (thick) |
| Sensing Distance | 2.5 – 10 cm |
| Data Retention | 10+ years |
| Operating Temperature | -10°C to +50°C |
| Material | Standard PVC |
| Weight | 6.5 g (thin) / 8.5 g (thick) |
| Country of Origin | Made in Mainland China |
Ideal Use Cases
- Office and corporate building access control
- Apartment and residential security systems
- Parking lot and gate management
- Time and attendance tracking systems
- Replacement or duplicate cards for existing HID reader installations
Learn More About RFID Security Standards
For information on physical access control and electronic security standards, visit the National Institute of Standards and Technology (NIST) Cybersecurity Resources.
Frequently Asked Questions
Q: Are these 125kHz HID RFID proximity cards compatible with standard HID card readers?
A: Yes. These cards use a genuine HID chip operating at 125kHz and are designed for use with HID-compatible card readers. The 26-bit (H10301) format is also broadly compatible with most standard access control panels on the market. Please verify your reader's supported formats before purchasing to ensure compatibility.
Q: What is the difference between the 0.76 mm (thin) and 1.8 mm (thick) card options?
A: The 0.76 mm thin card is designed for systems that require a standard ISO card thickness, such as wallets and card holders, while the 1.8 mm thick card (similar to HID's PROXCARD II "1326 thick card") is more robust and may be preferred for heavy-duty access control environments. Both variants share the same chip and RFID performance specifications.
Q: Can the card number be reprogrammed or rewritten after purchase?
A: Yes, these are rewritable RFID proximity cards, meaning they can be reprogrammed using a compatible 125kHz RFID read/write device. This makes them ideal for facilities that need to update or reassign credentials over time without purchasing entirely new cards.
Q: Will there be duplicate card numbers if I order multiple cards in the 26-bit format?
A: The 26-bit format is an open, industry-standard format. While HID does not guarantee uniqueness across all global orders in this format, the 37-bit (H10302) format is controlled by HID specifically to prevent duplicate card numbers. If non-duplication is critical to your deployment, the 37-bit format is the recommended choice.