IC technical library

EM4100 RFID products and specifications

Low frequency identification IC for compatible installed reader systems.

Specify EM4100 in a finished Roxtron product

Roxtron manufactures the product formats listed below with this IC option. Select the physical format to review its dimensions, materials, chip specifications and production requirements.

IC specification summary

Specification	Details
Semiconductor IC	EM4100
Interface / protocol	125 KHz
Catalog chip designation	EM4100
Operating interface	125 kHz
Catalog technology group	125 KHz
Part number selection	Confirm the manufacturer variant, memory layout and reader support with your quotation
Catalog aliases	H4100

Match the complete part number, reader command set and data format before qualification. Frequency alone does not establish interoperability.

Semiconductor technical references

Roxtron product configurations

How to interpret product and semiconductor specifications

EM4100 product configurations

Compare construction and dimensions within each format. IC availability depends on the selected antenna, size and approved order specification.

EM4100 smart cards

EM4100 RFID clamshell card

85.60 × 53.98 mm (or 3.370 × 2.125 in)

EM4100 RFID ISO card

85.60 × 53.98 mm (or 3.370 × 2.125 in)

EM4100 rfid & nfc labels

EM4100 LF 125 kHz labels

125 kHz · custom dimensions

EM4100 key fobs

EM4100 Angeline™ tag

PVC, epoxy

EM4100 RXK01 key fob

53 x 37.5 x 9.8 mm

EM4100 RXK02 key fob

35 x 27.5 x 5.5 mm

EM4100 RXK03 key fob

38x30x6 mm

EM4100 RXK04 key fob

40x33x4 mm

EM4100 wristbands

EM4100 Rozo™ wristband

290 x 37 mm; Adjustable size by Velcro band.

EM4100 RW01 wristband

270 x 37 mm; Custom sizes are available from Roxtron upon request.

EM4100 RW05 wristband

Silicone

EM4100 RW06 wristband

Multiple sizes available

EM4100 RW17 wristband

270 x 37 mm; Custom sizes are available from Roxtron upon request.

EM4100 RW27 wristband

246 x 36 mm

EM4100 RW35 slap bracelet

280 x 28 mm (Slap Band: Slap band; verify wearer fit)

EM4100 disc & embedded tags

EM4100 RXD00 transparent disc tag

Diameter 13mm, 15mm, 18mm, 20mm, 22mm, 25mm, 30mm, 35mm, 50mm

EM4100 RXR00 white disc tag

Diameter 13mm, 15mm, 20mm, 25mm, 30mm, 35mm

Reader compatibility and manufacturing qualification

Validate the modulation, bit rate and identifier format with the installed low frequency reader. NFC phones do not read 125 kHz credentials. For programmed formats, agree a sample identifier and confirm how the host system interprets it.

Select a finished product above for format specific guidance on dimensions, attachment, antenna placement and operating conditions.

State your required product model, IC order code, printed identifiers, encoding format, initial volume and delivery destination. Roxtron confirms the complete production specification and quotation before manufacture.

Request a quotation