SM Beads (Differential-Mode)
43 SM BEAD
43 Material®
Suppression Components
Board Component
Printer Friendly Data Sheet
Check Stock
Part Number: 2743021447
43 SM BEAD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
– Last digit 6 = Bulk Packed, 7 = Taped and Reeled
Surface mount beads are available from Fair-Rite in several materials and sizes. Their rugged construction lowers the dc resistance and increases current carrying capacity compared to plated beads.
Wires are oxygen free high conductivity copper with 100% matte tin plating over a nickel undercoating.
SM Beads meet the solderability specifications when tested in accordance with MIL-STD-202, method 208. After dipping the mounting site of the bead, the solder surface shall be at least 95% covered with a smooth solder coating. The edges of the copper strip are not specified as solderable surfaces.
After preheating the beads to within 100 °C of the soldering temperature, the parts meet the resistance to soldering requirements of EIA-186-10E, temperature 260 ±5 °C and time 10 ±1 seconds.
Recommended storage and operation temperature is -55 °C to 125 °C.
Our “Surface Mount Bead Kit” (part number 0199000025) is available for prototype evaluation.
Packaging Options:
– SM Beads on 12 mm tape width are supplied taped and reeled per EIA 481 and IEC 60286-3 standards. SM Beads on 16 and 24 mm tape widths are supplied taped and reeled per EIA 481 and IEC 60286-3 standards. Taped and reeled parts are supplied on a 13″ reel.
– SM Beads can also be supplied not taped and reeled and then are bulk packed. This packing method will change the last digit of the part number to a “6”.
For any SM Bead requirement not listed, please contact our customer service group for availability and pricing.
Suggested land patterns are in accordance with the latest revision of IPC-7351.
Weight: 0.3 (g)
| Dim | mm | mm tol | nominal inch | inch misc. |
| A | 3.05 | Max | 1.20 | Max |
| B | 3.05 | ±0.10 | 0.12 | _ |
| C | 9.6 | Max | 0.378 | Max |
| D | 1.5 | ±0.50 | 0.059 | _ |
| Land Patterns | ||||
| V | W | X | Y | Z |
| 4.50 (0.177”) | 7.50 (0.295”) | 1.80 (0.071”) | 3.00 (0.118”) | _ |
| Reel Information | ||||
| Tape Width mm | Pitch mm | Parts 7" Reel | Parts 13" Reel | Parts 14" Reel |
| 16 | 8 | -- | 2800 | -- |
Chart Legend
+ Test frequency
| Typical Impedance (Ω) | |
| 10 MHz | 45 |
| 25 MHz+ | 69 |
| 100 MHz+ | 105 |
| 250 MHz | 111 |
| Electrical Properties | |
| Max Rdc(mΩ) | 1.2 |
SM Beads are controlled for impedance limits only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is listed on our catalog drawing.
SM Beads in 73, 43 and 44 materials are measured for impedance on the E4990A Impedance Analyzer. The 52 and 61 SM Beads are tested for impedance on the E4991A / HP4291B Impedance Analyzer.
The maximum practical current rating for these SM Beads is 5 amps, check the component bias curves. The 019/021/037
and 044 SM Beads can withstand a continuous current of 10 amps resulting in a component temperature rise < 40 °C
| Typical Impendance (Ω) | |
| 10 MHz | 37 |
| 25 MHz+ | 56 |
| 100 MHz+ | 95 |
| 250 MHz | 100 |
This NiZn is our most popular ferrite for suppression of conducted EMI from 20 MHz to 250 MHz. This material is also used for inductive applications such as high frequency common-mode chokes.
Available in 43 material®:
EMI Suppression Beads
Beads On Leads
SM beads
Multi-Aperture Cores
Round Cable EMI Suppression Cores
Round Cable Snap-Its
Flat Cable EMI Suppression Cores
Flat Cable Snap-Its
Miscellaneous Suppression Cores
Bobbins
Toroids
43 Material® Characteristics
| Property | Unit | Symbol | Value |
| Initial Permeability@ B < 10 gauss | µi | 800 | |
| Flux Density @ Field Strength | Gauss Oersted |
B H |
3500 10 |
| Residual Flux Density | Gauss | Br | 2200 |
| Coercive Force | Oersted | Hc | 0.36 |
| Loss Factor @ Frequency | 10 -6 MHz |
Tan δ/ µi | 100 1.0 |
| Temperature Coefficient of Initial Permeability (20 -70°C) | %/°C | 1.25 | |
| Curie Temperature | °C | Tc | >130 |
| Resistivity | ohm-cm | ρ | 1×105 |
**** Characteristic curves are measured on standard Toroids (18/10/6 mm) at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.
Material Safety Data Sheet (MSDS)
Click here to download Complex Permeability vs. Frequency (CSV)
Ferrite Material Constants
Storage and Operating Temperature
Printer Friendly Data Sheet - Download as pdf file