SRUD12M4 (J41)

Smallest Passive RFID Tags for Inventory Impinj J41

Looking for ultra-compact, low-cost passive RFID tags for your inventory? Our smallest-size RFID tags are engineered to deliver maximum performance in minimal space, making them the perfect solution for tracking tiny assets, tools, retail items, or densely packed inventory.

Built on UHF passive RFID technology, these micro-sized tags operate without batteries, reducing both cost and maintenance. Despite their tiny footprint, they provide excellent read range and data accuracy, enabling real-time tracking of assets across warehouses, retail environments, and high-density storage systems.

Key Features:

  • Ultra-Compact Design: Among the smallest passive RFID tags on the market — ideal for tagging small or space-limited items like jewelry, electronics, or surgical tools.

  • Cost-Effective: With unit costs as low as $0.025 to $0.06, these tags offer a budget-friendly way to scale your inventory management system.

  • Battery-Free (Passive): No maintenance required — powered by the reader signal, making them durable and long-lasting.

  • Accurate Inventory Control: Enables fast, precise, and bulk scanning of items, improving stock visibility and reducing shrinkage.

  • Flexible Integration: Can be embedded, stuck, or sewn onto products, offering a wide range of applications across industries.

Physical Specification
Item
SRUD12M4 (J41)
Antenna size
D12 mm
Tag size
D15 mm
Thickness
11–18 mils / 279–463 microns
Material
Paper / PP / PET or customized
Adhesive
Solvent free permanent acrylic adhesive
Color
White, Transparent, etc.
Weight
0.01 g
RFID Specification
Air Interface Protocol
ISO/IEC 18000-6C, EPCglobal Class 1 Gen 2
Operating Frequency
860-960 MHz (Global)
IC Type
Impinj Monza 4E, Impinj Monza 4D, Impinj Monza 4i, Impinj Monza 4QT
Memory
Monza 4QT: EPC-512 bits; User-128 bits; TID-96 bits
Monza 4E: EPC-128 bits; User-496 bits; TID-96 bits
Monza 4D: EPC-32 bits; User-128 bits; TID-96 bits
Monza 4i: EPC-480 bits; User-512 bits; TID-96 bits
Write Endurance
100,000 cycles
Data Retention
Up to 20 years
Read Range
1 m to 4 m (Depend on reader and environment)
Feature
Bulk identification
Environmental Specification
Operating Temperature
-40 °C to +85 °C / -40 °F to +185 °F
Operating Humidity
20% to 60% RH
Recommended Storage
+25°C / 77°F, 40% RH
Bend Diameter
> 1.97” / 50 mm
Pressure
< 5N/mm2
Drop Resistance
Per ASTM D5276
Shelf Life
2 years at +25°C / +77°F, 40% RH
ESD Voltag Immunity
±2 kV peak HBM
Other Specification
Package Detail
3000 pcs/reel, vacuumed in ESD bag or customized
Core Size
76.2 mm / 3 in, etc.
Delivery Format
On reel for dry inlay, wet inlay, label
Samples Policy
For free if stock available
Personalization
Pre-print Logo / Barcode / QR / Series number, Pre-encode / encrypt, etc.
Final Inspection
100% tested, defective tags marked
Certification
CE Approved, RoHs Approved, etc.
Application
Screwdriver, pliers, small wrench tracking, etc.

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