Circuit Protection

FLAT™ GDTs

Bourns sets a new industry standard by offering this 2-electrode Gas Discharge Tube (GDT) in an innovative fl at package design. The Model 2015 Series with FLAT™ Technology provides a volume and space-saving solution for high density and space-restricted PCB applications. The series is offered in a leadless version for cartridge or clamp fi t applications. Surface mount versions are available in vertical and horizontal mounting confi gurations.

Heavy-Duty GDTs

The GDTs are primarily targeted to telecom applications requiring ITU compliance but are suitable for use in many other applications. The GDTs are 3-electrode devices with a maximum 8/20 µs surge current rating of up to 30 kA. Model 2028 and 2046 are offered as a core package for cassette or radial leaded for through-hole applications. An optional Fail-Short mechanism is available for thermal runaway protection.

Light-Duty GDTs

Premium GDT surge arrestor devices are designed to meet selected performance requirements as specified in ITU K.12.

Medium-Duty GDTs

Premium GDT surge arrestor devices are designed to meet selected performance requirements as specified in ITU K.12.

Long Life GDTs

Long Life GDT surge arrestor devices are designed to meet or exceed GDT performance as specified in ITU K.12. These GDTs are available in heavy duty, medium duty and light duty versions and are targeted to customers requiring superior performance of end products over a longer service life. In addition to ITU K.12, some heavy duty long life GDT series are based on key considerations of RUS-80/IEEE 465.1, GR-1361/GR-974/1089 as well as ITU K.20/21.

High Voltage

High-voltage GDT devices are designed specifically for those customers and applications requiring a high level of isolation. This family of GDT is available with DC breakdown voltages ranging from 800 V to 6000 V.

High Current

High-current GDT surge arrestor devices are designed to handle very large impulse discharge currents. Typically utilized in surge protective devices (SPDs), these GDTs have 8/20 μs impulse current ratings of 40-100 kA.

Fast GDTs

Bourns line of Fast Acting GDT surge arrestor devices are designed specifically for use with the Bourns® TBU® High-Speed Protector (HSP). These GDT are designed to limit high rate of rise voltage transients to levels below the TBU® HSP peak voltage impulse rating (V_imp).

LSP LED Protection Devices

Bourns announces their line of open LED shunt protection devices designed specifically for LED lighting applications. Designated the Bourns® LSP-Series, the new shunt protector family enables LED lighting applications configured in strings to be more robust and reliable. Most LED designs include solid-state lighting luminaires configured in series strings of 20 or more LEDs. In this configuration, an open LED can cause the entire LED string to go dark, resulting in reduced performance and possible maintenance calls and costly warranty returns. Adding a Bourns® LSP-Series shunt protector to an LED design allows the unaffected lights in the string to remain illuminated by shunting current around the inoperable LED. The new LSP-Series of open LED shunt protectors is an optimal solution for a variety of LED lighting applications including light bulbs, lighting fixtures, and backlighting systems.

MF-RM

Bourns® offers the MF-RM series of Multifuse® polymer PTC resettable fuses. This radial through-hole series is Bourns’ first family of PPTCs that can operate on an AC mains circuit of up to 240 VAC.

Bourns has launched this product family to assist consumer and industrial electronic manufacturers by offering a means to protect their AC circuits with a resettable overcurrent protection device.

The AC voltage rated MF-RM series has some unique features such as a UL-listed Vmax of 240 VAC, and a holding current of 50 mA to 550 mA.

MF-MSMF

MF-NSMF

MF-PSMF

MF-USMF

MF-SMDF

MF-FSMF

MF-SM

MF-R

MF-SD013/250

Bourns' MF-SD013/250 is a surface mount device containing twin 250V polymer PTC resettable fuses. This product builds on the very successful MF-SM013/250 device by packaging two of these devices into the same housing, reducing customer circuit board area by more than 50 percent.

The MF-SD013/250 provides tip and ring overcurrent protection and aids compliance with ITU-T K.20, K.21, and K.45 as well as Telcordia GR-1089 intra-building. The product can be used as part of an overall circuit protection solution utilizing a combination of other circuit protection products.

Low-capacitance and high-speed surge protection

The TBU® device from Bourns is a silicon-based, solid-state, resettable device that is placed in series with a signal path. The TBU® (transient blocking unit) device operates in approximately 1 μs once line current exceeds the TBU® device’s trigger current. When operated, the TBU® device typically restricts line current to less than 1 mA. When operated, the TBU® device will block all system voltages and any other voltages including the surge up to rated limits.

After the surge, the TBU® device resets when the voltage across the TBU® device falls to the Vreset level. The TBU® device will automatically reset on lines that have no DC bias or that have a DC bias below Vreset (such as un-powered signal lines). If the line has a normal DC bias above Vreset, the voltage across the TBU® device may not fall below Vreset after the surge. In such cases, special care needs to be taken to ensure that the TBU® device will reset, otherwise an automatic or manual power down will be required.

TBU Design Kits

Bourns® TBU® high-speed protectors are circuit protection devices constructed using MOSFET semiconductor technology. When placed in series in the system, the TBU® protector monitors the current flowing through the line. If the current exceeds a preset level, the TBU® device triggers, providing an effective barrier to large, destructive voltages or currents during surge events, thereby protecting sensitive electronics.

MOV-07/10/14/20 Series

Bourns® MOV product portfolio offers 7, 10, 14, and 20 mm radial leaded varistor devices which protect against overvoltage transients such as lightning, power contact and power induction. The metal oxide varistors offer a choice of varistor voltages from 18 V to 1800 V and Vrms voltages from 11 V to 1100 V. The devices have high current handling, high energy absorption capability and fast response times to protect against transient faults up to rated limits.

PTVS3-xxxC-TH Series High Current TVS Diodes

The Model PTVS3-xxxC-TH Series high current bidirectional TVS diodes are designed for use in high power DC bus clamping applications. These devices offer bidirectional port protection and are available with standoff voltage ratings of 58 V and 76 V.

The devices are RoHS* compliant and UL Recognized (pending). They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS3-xxxC-TH Series High Voltage, High Current TVS Diodes

The Model PTVS3-xxxC-TH high voltage, bidirectional TVS diode series is designed for use in AC line and high power DC bus clamping applications.

The devices are RoHS* compliant. They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS6-xxxC-TH Series High Current TVS Diodes

The Model PTVS6-xxxC-TH Series high current bidirectional TVS diodes are designed for use in high power DC bus clamping applications. These devices offer bidirectional port protection and are available with standoff voltage ratings of 58 V and 76 V.

The devices are RoHS* compliant and UL Recognized (pending). They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS6-xxxC-TH Series High Voltage, High Current TVS Diodes

The Model PTVS6-xxxC-TH high voltage, bidirectional TVS diode series is designed for use in AC line and high power DC bus clamping applications.

The devices are RoHS* compliant. They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS10-xxxC-TH Series High Current TVS Diodes

The Model PTVS10-xxxC-TH Series high current bidirectional TVS diodes are designed for use in high power DC bus clamping applications. These devices offer bidirectional port protection and are available with standoff voltage ratings of 58 V and 76 V.

The devices are RoHS* compliant and UL Recognized (pending). They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS10-xxxC-TH Series High Voltage, High Current TVS Diodes

The Model PTVS10-xxxC-TH high voltage, high current, bidirectional TVS diode series is designed for use in AC line and high power DC bus clamping applications.

The devices are RoHS* compliant. They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS3-xxxC-SH Series High Current TVS Diodes

The PTVS3-xxxC-SH range of high current bidirectional TVS diodes is designed for use in high power DC bus clamping applications. These devices offer bidirectional port protection and are available with standoff voltage ratings of 58 V and 76 V.

The devices are RoHS* compliant. They also meet IEC 61000-4-5 8/20 µs current surge requirements.

PTVS10-xxxC-SH Series High Current TVS Diodes

The PTVS10-xxxC-SH range of high current bidirectional TVS diodes is designed for use in high power DC bus clamping applications. These devices offer bidirectional port protection and are available with standoff voltage ratings of 58 V and 76 V.

The devices are RoHS* compliant. They also meet IEC 61000-4-5 8/20 µs current surge requirements.

High Current Bidirectional Power TVS

Bourns is pleased to announce the release of the PTVS series of high current bidirectional TVS diodes designed for use in AC line protection and high power DC bus clamping applications. The use of silicon technology in the Power TVS products generally offers lower clamping voltage under surge than competing MOV technology. These devices offer bidirectional port protection from 58 volts to 470 volts in a through-hole package, and RoHS and UL compliancy while also meeting IEC 61000-4-5 8/20 μs current surge requirements.

TCS-DL Series

The TCS™ DL Series High-Speed Protector products contain dual, well-matched, low resistance, bidirectional, very high-speed Transient Current Suppressors. By limiting the maximum current to a safe level, a Bourns® TCS™ DL device offers superior protection for very high data rate differential lines against faults caused by short circuits, induction and lightning surges.

TCS™ High-Speed Protectors are typically used in conjunction with low capacitance TVS devices to form an extremely low let-through energy barrier to excessive voltages and currents during surge events which may cause damage to unprotected high-speed, low voltage driver and receiver components.

TCS™ High-Speed Protector is provided in a space-saving, surface mount DFN package meeting industry standard requirements such as RoHS and Pb Free solder refl ow profiles.

Fast Acting Surface Mount Fuses

The SinglFuse™ product line is designed to provide overcurrent protection for a wide range of circuits, and hence, the family is comprized of 70 different part numbers. These are offered in three industry standard sizes (0402, 0603, 1206).

Slow Blow Surface Mount Fuses

The SinglFuse™ product line is designed to provide overcurrent protection for a wide range of circuits, and hence, the family is comprized of 70 different part numbers. These are offered in three industry standard sizes (0402, 0603, 1206).

Certified EMC Compliant RS-485
Interface Design Tool

Analog Devices and Bourns have partnered together to extend their offering of system oriented solutions by co-developing the industry’s first EMC-compliant RS-485 interface design tool that provides up to Level 4 protection levels for IEC61000-4-2 ESD (electrostatic discharge), IEC61000-4-4 EFT (electrical fast transients), and IEC61000-4-5 surge. With three different protection solutions on on board, the EVAL-CN0313-SDPZ board incorporates ADI’s ADM3485E, 3.3 V RS-485 transceiver with Bourns® TBU® High-Speed Protectors, TISP® Thyristor Surge Protectors, TVS Diodes, and Gas Discharge Tubes to provide a certified, time-saving starting point for your latest RS-485 design. The board provides engineers with design and integration files, device drivers, and evaluation hardware.

RS-485 Eval Boards

Bourns presents two evaluation boards for RS-485-based applications. Using Bourns® TBU® High-Speed Protectors (HSPs), GDTs, TVS diodes and MOV products, the boards were developed as a design resource that streamlines evaluating circuit protection on RS-485 serial device ports. To meet the required industry standards on RS-485 port interfaces, the boards provide two different evaluation approaches. The Bourns® RS-485EVALBOARD1 includes two Bourns® TBU® High-Speed Protectors (HSPs), two Bourns® fast-acting GDTs and two Bourns® TVS diodes. The Bourns® RS-485EVALBOARD2 uses Bourns® TBU® High-Speed Protectors (HSPs), MOVs and TVS products.

TBU Design Kits

Bourns® TBU® high-speed protectors are circuit protection devices constructed using MOSFET semiconductor technology. When placed in series in the system, the TBU® protector monitors the current flowing through the line. If the current exceeds a preset level, the TBU® device triggers, providing an effective barrier to large, destructive voltages or currents during surge events, thereby protecting sensitive electronics.

PortNote® Solutions

PortNote® solutions and design kits from Bourns provide engineers with an easy and effective way to see Bourns’ circuit protection devices in typical applications. Each PortNote® design kit contains enough Bourns® products to build five of the PortNote® solution circuits.

For the datacom market, Bourns created circuit protection design kits for common interfaces such as Ethernet, POE and USB. The design kits provide engineers with components for ESD, surges, and short circuits.

For the audio/video market, Bourns created circuit protection design kits for common media inputs such as HDMI and VHF/UHF coaxial. The PortNote® solution design kits provide circuit protection components for ESD and surges.

For the telecom market, Bourns created circuit protection design kits for common telecom interfaces such as ISDN, VDSL, T1/E1, and RJ11 ports. The PortNote® solution design kits give engineers the necessary components for assembling surge and power contact protected ports.