
WE-MPSB: Multilayer Power Suppression Bead
Würth Elektronik's WE-MPSB series is the world’s first ferrite bead that specifies how it performs under high current transients. This unique bead protects and extends the life of your application. It features an ultra-low RDC which delivers the lowest self-heating in its class at high currents. The WE-MPSB is ideal for DC/DC applications requiring high efficiency.
The innovative design in detail
WE-MPSB optimizes high current vs. RDC performance with up to 75% RDC reduction in comparison to similar components while maintaining a high impedance over a wide frequency range.

Optimized layer design for muscular peak current capability

Greater trace cross sectional area for ultra-low RDC

High peak current rating to maximize lifetime
Greatly improved peak current rating

High impedances over wide frequency bandwidths with up to 40% higher rated current and up to 20x higher peak current capability than standard ferrite beads.
Characteristics
- Peak current is up to 20 times higher than rated current
- Up to 40% higher rated current compared with similar products
- Optimized layer design to achieve ultra-low RDC and muscular rated current
- High impedance over a wide frequency range at rated current
- Minimized DC bias influence to impedance

Application
The WE-MPSB is ideal for use with an input capacitor in power supplies.
- Transient hostile environments
- Filter for inrush current applications
- Input/output filter of hot swap controllers
- Hot board insertion
- Electronic circuit breakers
- Industrial high-side switch/circuit breakers
- Motor interference suppression
- Input/output filter for DC/DC converter
Standard chip bead ferrites are not designed for fast transients. This makes them vulnerable to peak current in critical environments
The WE-MPSB is a muscular bead that can be exposed to peak currents without any damage. Its optimized layer design and ultra-low RDC protect and extend the life of your application.
It is a solution you cannot afford to overlook.
Resources
Related Content
Application Notes
- ANP006 Influence of Control Loop by an Output Filter
- ANP009 Loss-Free Filtered
- ANP028 The World’s First Peak Current Load SMD Ferrite
- ANP041 Peak Current Proof Input Filter with Multilayer Power Suppression Bead WE-MPSB
- ANP044 Impact of the Layout, Components, and Filters of the EMC of Modern DC/DC Switching Controllers
Videos
- @AskLorandt explains: Rated current of an inductor
- @AskLorandt explains: Peak current capability of chip bead ferrites
- @AskLorandt explains: Temperature influence of the saturation current for an inductor
- @AskLorandt explains: Saturation current of an inductor
- @AskLorandt explains: Selecting the proper Inductor with REDEXPERT
WE-MPSB Series
Image | Manufacturer Part Number | Description | Filter Type | Impedance @ Frequency | Current Rating (Max) | Available Quantity | Price | View Details | |
---|---|---|---|---|---|---|---|---|---|
![]() | ![]() | 74279228111 | FERRITE BEAD 110 OHM 0603 1LN | - | 110 Ohms @ 100 MHz | 4.1A | 104720 - Immediate | $2.22 | View Details |
![]() | ![]() | 74279220601 | FERRITE BEAD 600 OHM 0805 1LN | - | 600 Ohms @ 100 MHz | 2.1A | 45720 - Immediate | $2.80 | View Details |
![]() | ![]() | 74279223560 | FERRITE BEAD 56 OHM 1612 1LN | - | 56 Ohms @ 100 MHz | 10A | 109524 - Immediate | $4.03 | View Details |
![]() | ![]() | 74279226101 | FERRITE BEAD 100 OHM 1812 1LN | - | 100 Ohms @ 100 MHz | 8A | 39567 - Immediate | $5.60 | View Details |
![]() | ![]() | 74279225101 | FERRITE BEAD 100 OHM 3312 1LN | - | 100 Ohms @ 100 MHz | 10A | 20253 - Immediate | $11.20 | View Details |
![]() | ![]() | 74279224551 | FERRITE BEAD 550 OHM 2220 1LN | - | 550 Ohms @ 100 MHz | 4A | 6919 - Immediate | $11.20 | View Details |
![]() | ![]() | 74279228260 | FERRITE BEAD 26 OHM 0603 1LN | - | 26 Ohms @ 100 MHz | 6.5A | 19707 - Immediate | $2.22 | View Details |
![]() | ![]() | 7427922808 | FERRITE BEAD 8 OHM 0603 1LN | - | 8 Ohms @ 100 MHz | 9.5A | 6651 - Immediate | $2.22 | View Details |
![]() | ![]() | 74279228600 | FERRITE BEAD 60 OHM 0603 1LN | - | 60 Ohms @ 100 MHz | 5.1A | 10983 - Immediate | $2.55 | View Details |
![]() | ![]() | 74279220321 | FERRITE BEAD 320 OHM 0805 4LN | - | 320 Ohms @ 100 MHz | 2.5A | 32929 - Immediate | $2.80 | View Details |