MRO Magazine

Littelfuse Expands TVS Diode Array Product Line with Two New Series Designed for Enhanced Protection Against ESD and Lightning

September 17, 2015
By Business Wire News


Littelfuse, Inc., the global leader in circuit protection, has introduced two new product series, the SP4044 and SP4045 Series TVS Diode Arrays (SPA® Diodes), designed to protect sensitive electronics from destructive electrostatic discharges (ESD) and lightning-induced surge events. Low capacitance diodes are integrated with an additional zener diode to protect each I/O pin against ESD and high surge events. These robust devices offer a benchmark-setting surge protection/capacitance ratio; safely absorbing up to 24A of lightning-induced surges while presenting only 1.5pF per I/O-to-Ground connection. This helps to assure minimal signal degradation. The array can also handle a minimum of ±30kV ESD, so electronics manufacturers can realize greater protection and enhance product reliability in the field. The low loading capacitance also makes the SP4044 and SP4045 Series ideal for protecting high speed signal pins. “Straight-through” routing allows these components to sit on top of the lines they protect, eliminating stub parasitic capacitance and inductance and ensuring higher signal integrity.

Typical applications for the SP4044 and SP4045 Series TVS Diode Arrays include protecting HDBaseT, 2.5 and 5 Gigabit Ethernet, and 10/100/1000 Ethernet ports, as well as secondary protection for T1/E1 , T3/E3, and high-end audio-visual equipment lines.

“These low capacitance, low clamping protection devices will make the design engineer’s life just a little bit easier,” said Tim Micun, product manager for the TVS Diode Array (SPA® Diodes) line. “By allowing straight-through routing, they eliminate complicated trace capacitance calculations and data reflections, and support high signal integrity on the ultra-fast HDBaseT, 2.5 and 5 Gigabit Ethernet ports.”

SP4044 and SP4045 Series TVS Diode Arrays offer these key benefits:

  • Peak pulse power (500W for SP4044, 600W for SP4045) allows far more headroom against electrical threats as defined by regulatory standards.
  • High ESD and lightning surge immunity allow manufacturers to achieve ESD protection above the maximum level stated in the IEC Standard and protect against a multitude of other threats to ensure product reliability in the field.
  • Low capacitance (1.5 pF typical) preserves signal integrity and minimizes data loss while offering a more robust device against electrical threats.
  • Very low dynamic resistance (0.22Ω for SP4044, 0.3Ω for SP4045) produces low clamping voltages, allowing these devices to protect modern/small geometry chipsets against industry-defined ESD transients.


The SP4044 and SP4045 Series TVS Diode Arrays are available in a 10-lead Mini Small Outline Package (MSOP-10) in tape and reel packaging, with a minimum order quantity of 4,000. Sample requests can be placed through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit

For More Information

Additional information is available on the SP4044 Series product page and the SP4045 Series product page. If you have technical questions, please contact: Tim Micun, product manager, TVS Diode Arrays (SPA® Diodes),

About Littelfuse

Founded in 1927, Littelfuse is the world leader in circuit protection with growing global platforms in power control and sensing. The company serves global customers in the electronics, automotive and industrial markets with technologies including fuses, semiconductors, polymers, ceramics, relays and sensors. Littelfuse has over 8,000 employees in more than 35 locations throughout the Americas, Europe and Asia. For more information, please visit the Littelfuse website:

For high resolution image click here: SP4044 and SP4045 Series TVS Diode Arrays

Littelfuse, Inc.
Electronics Products
Rhonda Stratton, Global Marketing Communications Manager, 773-628-0644