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PolySwitch TSM600-400F Device

Ready for GR-1089 Issue 3

Telcordia GR-1089 Issue 3 adds significant new requirements for telecommunications equipment, including a new lightning-coordination test. To help designers meet the revised requirements, Raychem Circuit Protection offers the new PolySwitch TSM600-400F RoHS compliant overcurrent protection device.

In addition to Telcordia GR-1089 Issue 3, the resettable surface-mount device also helps network equipment manufacturers comply with these safety and telecommunications standards:

UL 60950 3rd edition
TIA-968-A (formerly FCC Part 68) ,
ITU-T K.21 & K.21 recommendations

PolySwitch Devices

TSM600-400F * Electrical Characteristics (at 20° C)
IH (A)	Max interrupt voltage (V)	Min resistance (Ω)	Typ. resistance (Ω)	R1max (Ω)	Resistance match	Typical power dissipation in the tripped state (W)
0.400	600	0.5	1.2	2.0	0.5	2

Intended for use in “grounded” communications systems such as POTS and xDSL linecards, T1/E1 systems and twisted pair telecom ports requiring Telcordia GR-1089 Issue 3 compliance, the PolySwitch TSM600-400F device offers the following features and benefits.

Feature	Benefit
Two resistance-matched PPTC elements in a single package	Provides balanced protection on tip & ring lines.
Low series resistance	Yields minimal attenuation on data transmission.
Small footprint SMT form factor	Helps conserve valuable space on high-density multiport line cards and other network equipment.
Coordinated circuit protection	Combining a TSM600-400F device with a thyristor surge protector device or gas discharge tube helps designers meet the lightning and AC power fault protection requirements defined in Telcordia GR-1089 Issue 3.
Lead-free construction	Helps manufacturers comply with RoHS and WEEE directives scheduled to take effect in August 2006.

Other Telecom Products

• IH = Hold current—maximum current the device will pass without interruption in 20°C still air.
• R1max = Maximum device resistance at 20°C measured 1 hour post trip or post reflow.
• Resistance Match = Maximum difference in resistance between the two PPTC components
• UL and CSA Agency recognized device (UL file # E74889; CSA file # CA78165).
* TSM600-400F-2 designed to meet the new issue 3 of Telcordia GR-1089 lightning coordination test under the 10/100μs waveform at 1kV with 100A through current.