Leiditech SD0551P8F's core feature is "small size, big energy" — integrating exceptionally strong transient surge absorption capability within an extremely compact package. It is specifically designed to protect circuits from transient high-voltage shocks such as ESD and lightning strikes. The package is FBP1608-2L, measuring only 1.6mm × 0.8mm × 0.5mm, significantly saving PCB space.

The SD0551P8F is a perfect replacement for Semtech's μClamp0561P, offering high cost-effectiveness and stable supply.

       The parameter comparison list between the SD0551P8F and Semtech µClamp0561P is as follows:

SD0551P8F Performance Characteristics

l High surge current capability: Peak pulse current (Ipp) up to 80A, far exceeding most comparable ESD protection devices. Ideal for protecting power buses (VBus) and battery lines that are susceptible to strong energy shocks such as lightning strikes and power supply overshoot.

l Extreme ESD protection level: ESD protection capability of ±30kV (air and contact discharge), far exceeding the strictest Level 4 requirement (±15kV) of the IEC 61000-4-2 standard. Easily handles ESD threats faced by most consumer and industrial electronic devices.

l Compact package design: FBP1608-2L package, measuring only 1.6 × 0.8 × 0.50 mm. Achieving 80A surge capability within such a small package is highly competitive, saving valuable PCB area.

l Summary and applicable scenarios: In summary, the SD0551P8F combines a small package with exceptional surge capability, making it ideal for protecting USB VBus, battery connections, and other power lines in products such as mobile phones, tablets, industrial equipment, and security cameras.

SD0551P8F Application Circuit

SD0551P8F is typically used in USB 2.0 interface Vbus circuits. This solution is especially suitable for space-constrained USB interfaces.

In actual circuit design, the SD0551P8F is connected in parallel between VBus and GND to provide a discharge path for surge current to ground. For the FBP1608-2L package, it is recommended to reserve sufficient copper area on the pad design to enhance heat dissipation. For specific layout guidance, please contact Leiditech for application notes. 

Leiditech FBP1608-2L Series ESD Diodes

The FBP1608-2 package diodes are available in 5.0V, 12V, 15V, and 24V working voltages. The full series parameters are as follows:

Replacement Quick Reference:

· SD0551P8F → Replaces Semtech µClamp0561P

· SD1251P8F → Replaces Semtech µClamp1261P

· SD2451P8F → Replaces Semtech µClamp2461P

This package series is mainly used for ESD and surge protection on power interfaces such as USB VBus and battery protection.

Sample Application & Technical Support

The SD0551P8F is already in mass production. Please contact the Shanghai Leiditech EMC engineer or sales representatives to request free samples for testing. Complete technical support is also available, including PCB layout guidance and surge test verification reports.

Leiditech's FBP1608-2L full series (5V/12V/15V/24V) can replace Semtech µClamp 0561P/1261P/1561P/2461P. For selection support, please contact the EMC engineer directly.

Leiditech is committed to becoming a leading brand in EMC solutions and component supply, offering products such as ESD, TVS, TSS, GDT, MOV, MOSFET, Zener diodes, and inductors. Leiditech has a highly experienced R&D team capable of providing customized services based on customer requirements, delivering the best-in-class solutions to its clients.