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Telecommunications and Networking

PolySwitch Telecommunications

and Networking

Resettable Devices

PolySwitch devices for telecom-

munication and networking appli-

cations were initially designed

over ten years ago to meet the

growing demand for resettable

overcurrent protection. These

product families help provide pro-

tection against power cross and

power induction surge as defined

in ITU, Telcordia, and UL.

Available in chip, surface-mount,

and radial-leaded configurations,

PolySwitch devices help improve

the reliability of customer premise

and network equipment world

wide.

Benefits:

• Many product choices give

engineers more design

flexibility

• Compatible with high volume

electronics assembly

• Assist in meeting regulatory

requirements

• Improved line balance

• Applicable for legacy POTS and

modern digital communications

equipment.

Features:

• Resettable overcurrent

protection

• Surface-mount, radial-leaded,

and chip form factors

• Fast time-to-trip

• Agency recognition: UL, CSA,

TÜV

• Resistance sorted and matched

devices available

• Low parasitic capacitance/flat

impedance with frequency

Target Applications:

•

Modems

Phone sets

Fax machines

Phone wall outlets

Alarm systems

PBX systems

MDF modules

Analog and digital line cards

T1/E1 equipment

xDSL modems and splitters

Powered ethernet systems

VoIP (Voice over IP equipment)

LAN, WAN equipment

Customer premise equipment

Access network hardware

285

Products in this section are grouped by:

Application/Specification, Product Series, Hold Current

Raychem Circuit Protection

PolySwitch Telecommunications and Networking Resettable Devices

Selection Table for Telecommunications and Networking Devices

Step 1.

Review the Protection Application Guide on page 287

which is based on the agency specification required to

qualify the final equipment.

Use the selection guide to narrow your product selection based on key

device characteristics.

Step 2.

Verify that the PolySwitch device hold current will accom-

modate the telecommunications circuit’s maximum ambi-

ent temperature and normal operating current.

Look across the top of the thermal derating table T2 on page 290 to

find the temperature that most closely matches the circuit’s maximum

operating temperature. Look down that column to find the value equal

to or greater than the circuit’s normal operating current. Now look to

the far left of that row to find the part number for the PolySwitch

telecommunications device that will best accommodate the circuit.

Note: The thermal derating curves in Figure T1 on page 291 are the

normalized representations of the data in the thermal derating table.

Step 3.

Verify that the time-to-trip characteristic of the chosen

device meets the protection requirements of the

telecommunications equipment circuit.

Time-to-trip is the amount of time it takes for a device to switch to a

high resistance state once a fault current has been applied across the

device. Identifying the PolySwitch device’s time-to-trip is important in

order to provide the desired protection capabilities. If the device you

choose trips too fast, undesired or nuisance tripping will occur. If the

device trips too slowly, the components being protected may be

damaged before the device switches to a high resistance state.

Refer to typical time-to-trip curves (Figures T11-16) on pages 297-299

for each of the PolySwitch devices. If the PolySwitch device’s time-to-

trip is too fast or too slow for the circuit, go back to Step 2 and choose

an alternate device.

Step 4.

Verify ambient operating condition.

Ensure that your application’s minimum and maximum ambient

temperatures are within the operating temperature range of -40°C

to 85°C.

Step 5.

Independently evaluate and test the device.

PolySwitch devices assist your telecommunications equipment in

meeting agency requirements. To confirm your selection, independent-

ly evaluate and test the device to the application requirements.

286

PolySwitch Telecommunications and Networking Resettable Devices

Raychem Circuit Protection

Telecommunications and Networking

Protection Application Guide for Telecommunications and Networking Devices

To use this guide, follow the steps

below:

1. Select your equipment type

from the guide below.

2. Select the type of protection

depending on the agency and

regional specifications in the

second column.

3. Use the Key Device Selection

Criteria (size, resistance, time-

to-trip) to determine best suit-

ability for your application.

4. Use the Agency Specification/

PolySwitch Device Selection

Guide on the next page to

select a specific part number

for each application based on

the agency requirements.

PolySwitch Resettable Devices

Application

Customer premises equipment,

IT equipment

Analog modems, V.90 modems,

ISDN modems, xDSL modems,

ADSL splitters, phone sets, fax machines,

answering machines, caller ID, internet

appliances, PBX systems, POS terminals,

wall plugs

Access network equipment (*)

Remote terminals, line repeaters,

multiplexers, cross-connects,

WAN equipment

Region/

Specification

North America

FCC Part 68, UL 1950,

UL 1459

Europe/Asia/

South America

ITU K.21

North America

Telcordia GR-1089

Europe/Asia/

South America

ITU K.45

North America

Telcordia GR-1089

Europe/Asia/

South America

ITU K.20

North America

Telcordia GR-974

Europe/Asia/

South America

ITU K.20

Short-haul/intrabuilding communications

equipment (*)

LAN equipment, VoIP cards, cable

telephony NIUs, wireless local loop

handsets

North America

Telcordia GR-1089

intrabuilding

Europe/Asia/

South America

ITU K.21

Key Device Selection Citeria

Small Footprint

Low Resistance

TR600-150

TS600-170

TR250-120

TR250-145

TS250-130

TSV250-130

TR600-150-RA

TS600-200-RA

TR250-120

TR250-145

TS250-130

TSV250-130

TR600-150-RA

TS600-200-RA

TR250-120

TR250-145

TS250-130

TSV250-130

TR250-180U

TRW250-180

TGC250-120T

TR250-120T

TS250-130

TSV250-130

TSL250-080

TR250-120

TS250-130

TSV250-130

TR250-120

TR250-145

TS250-130

TSV250-130

TSL250-080

miniSMDC014

TR600-150-RA

TS600-200-RA

TR250-180U

TRW250-180

TS250-130-RA

TSV250-130

TR600-160-RA

TS600-200-RA

TR250-180U

TRW250-180

TS250-130-RA

TSV250-130

TR600-160-RA

TS600-200-RA

TR250-180U

TS250-130-RA

TSV250-130

TR250-180U

TRW250-180

TC250-145T

TR250-145-RA

TS250-130-RA

TSV250-130

TR250-145

TRW250-180

TR250-180U

TS250-130-RA

TR250-180U

TRW250-180

TS250-130-RA

TSV250-130

TSL250-080

SMD030-2018

SMD030

Fast Time-to-Trip

TR600-150-RB

TS600-170

TR250-120T-R2

TS250-130-RB

SiBar Thyristor

Surge Protectors

TVBxxxSA or

TVAxxxSA with

TR/TS; TVBxxxSC

with TR/TS or fuse

TVBxxxSA

TVAxxxSA

TR600-150-RB

TS600-170

TR250-120T-R2

TS250-130-RB

TVBxxxSC

TVBxxxSA

TVAxxxSA

Central office switching equipment (*)

Analog/POTS linecards, ISDN linecards,

xDSL modems, ADSL/VDSL splitters,

T1/E1 linecards, multiplexers,

CSU/DSU, servers

TR600-150-RB

TS600-170

TR250-120T-R2

TS250-130-RB

TVBxxxSC

TVBxxxSA

TVAxxxSA

Primary protection modules (*)

MDF modules, Network Interface

Devices (NID)

TR250-180U

TRW250-180

TGC250-120T

TR250-120T-R2

TS250-130-RB

TSV250-130

TR250-120T-R2

TSL250-080

TR250-120T-R2

TS250-130-RB

N/A

TVBxxxSA

TVAxxxSA

TVBxxxSA

TVAxxxSA

LAN intrabuilding power cross protection

LAN equipment, VoIP cards, IP phones

IEEE 802.3 Power over LAN protection

Powered ethernet switches and terminals,

IP phones, wireless LAN base stations,

microcellular base stations, VoIP cards

Cable telephony powering systems

Power passing taps

TSL250-080

SMD030-2018

TVBxxxSA

TVAxxxSA

N/A

BBR550

BBR750

BBR550

N/A

Notes:

This list is not exhaustive. Raychem Circuit Protection welcomes our customers’ input for additional application ideas for PolySwitch resettable devices.

* For improved line balance in these applications, resistance-matched parts are recommended.

For

more information on Raychem Circuit Protection SiBar thyristor surge protectors, refer to the SiBar product section on page 313.

Raychem Circuit Protection

PolySwitch Telecommunications and Networking Resettable Devices

287

Agency Specification/PolySwitch Selection Guide for Telecommunications and Networking Devices

Use the guide below to select the

PolySwitch devices which are

typically used in your application.

The following pages contain the

specifications for the part num-

bers recommended below.

PolySwitch devices assist tele-

communication equipment in

meeting the applicable protection

requirements of these industry

specifications. Refer to individual

agency specifications for test

procedures and circuit schematics.

Users should independently evalu-

ate the suitability of, and test each

product for their application.

Family

TGC250

TC250

TR250

Product *

TGC250-120T

TC250-145T

TC250-180

TR250-080U

TR250-110U

TR250-120

TR250-120T

TR250-120U

TR250-120UT

TR250-145

TR250-145U

TR250-180U

TRW250-180

Lightning

ITU K.20/21/45 – 1.5kV 10/700µs

ITU K.20/21/45 – 4.0kV 10/700µs **

ITU K.20 – 1.0kV 10/700µs

ITU K.20/21/45 – 1.5kV 10/700µs

ITU K.20/21/45 – 4.0kV 10/700µs **

Power Cross

ITU K.20/21/45 – 230VAC, 10Ω

ITU K.20/21/45 – 600VAC, 600Ω

ITU K.20 – 230VAC, 10Ω

ITU K.20 – 600VAC, 600Ω

ITU K.20/21/45 – 230VAC, 10Ω

ITU K.20/21/45 – 600VAC, 600Ω

ITU K.20/21/45 – 1.5kV 10/700µs

ITU K.20/21/45 – 4.0kV 10/700µs **

Telcordia GR-974 – 1.0kV, 10/1000µs

ITU K.20/21/45 – 1.5kV 10/700µs

ITU K.20/21/45 – 4.0kV 10/700µs **

Telcordia GR-1089 Intrabuilding – Surge 1 & 2

FCC Part 68 – Type A and B

Telcordia GR-1089 – Level 1 and 2 ***

FCC Part 68 – Type A and B

Telcordia GR-1089 – Level 1 and 2 ***

ITU K.20/21/45 – 230VAC, 10Ω

ITU K.20/21/45 – 600VAC, 600Ω

Telcordia GR-974 – 283VAC, 10A

ITU K.20/21/45 – 230VAC, 10Ω

ITU K.20/21/45 – 600VAC, 600Ω

Telcordia GR-1089 Intrabuilding – 120VAC, 25A

ITU K.20/21/45 – 230VAC, 10Ω

UL 1950, 3rd Ed. – 600VAC, 40A

Telcordia GR-1089 – 600VAC, 60A

UL 1950, 3rd Ed. – 600VAC, 40A

Telcordia GR-1089 – 600VAC, 60A

TSV250

TS250

TSL250

TR600

TS600

Notes:

TSV250-130

TS250-130

TSL250-080

TR600-150

TR600-160

TS600-170

TS600-200-RA

*Applies to all products which share the same prefix.

**Tested with 230V gas discharge tube primary protector.

***May require 10

Ωhm

series resistor to help telecommunication equipment pass Test 3 (1kV, 10/1000

µs

Referenced specifications are a sample list only. For detailed applications information, refer to the Application Notes section of this databook.

288

PolySwitch Telecommunications and Networking Resettable Devices

Raychem Circuit Protection

Telecommunications and Networking

Table T1. Product Series: Size, Current Rating, Voltage Rating, Typical Resistance for

Telecommunications and Networking Devices

TC250

TGC250

Voltage Rating (V)**

(Operating/Interrupt)

Telcordia

GR-1089

Intrabuilding

8.0Ω

—

UL1950

Telcordia

GR-1089

—

11.0Ω

—

8.5Ω

—

UL1950

Telcordia

GR-1089

—

8.5-10.5Ω

5.5-7.0Ω

—

Cable

Taps

—

0.7Ω

0.5Ω

—

3.5Ω

—

4.3Ω

—

2.3Ω*

1.6Ω*

1.1Ω*

—

4.0Ω

—

1.4-3.0Ω

—

60/250

TR250

60/250

TS250

60/250

TSV250

60/250

TSL250

80/250

TS600

60/600

TR600

60/600

BBR

RXE

72*

SMD,midSMD

miniSMDC

Specification

Hold Current (A)

0.080

0.100

0.110

0.120

0.130

0.140

0.145

0.150

0.160

0.170

0.180

0.200

0.250

0.300

0.550

0.750

Notes:

ITU

—

10.5Ω

—

7.0Ω

—

1.4Ω

—

ITU

17.0Ω

—

7.0Ω

6.0-9.5Ω

—

4.3-5.0Ω

—

1.4Ω

—

ITU

—

8.0-10.5Ω

—

ITU

—

5.5Ω

—

*These devices have a maximum operating voltage of 72V

**Voltage Rating for Telecommunications and Networking Devices is dependent upon the nature of the fault conditions. See below for details

Voltage Ratings for Telecommunications and Networking Devices

For Raychem Circuit Protection

telecommunications devices (TC,

TGC, TRx, TSx series) there are

two applicable voltage ratings.

These are

MAX

Operating

and

MAX

Interrupt.

To help under-

stand the nature of these two dif-

ferent voltage ratings the

following definitions are provided:

MAX

Interrupt:

Under specified

conditions this is the highest volt-

age that can be applied to the

device at the maximum current.

Devices have been designed to

trip safely under higher power

level cross condtions, as listed

above, to assist equipment in

meeting the appropriate industry

conditions.

MAX

Operating:

For telecommu-

nications devices this is the volt-

age we have used to obtain

component recognition under

UL1434. Raychem Circuit

Protection devices (TC, TGC,

TRx, TSx series) are recognized

at 60V but can withstand higher

MAX

interrupt

conditions as

noted above.

Raychem Circuit Protection

PolySwitch Telecommunications and Networking Resettable Devices

289

型号	RXE0254	RXE0304	RXE0204	SMD0304	SMD030-20184	MINISMDC0144	BBR7504
描述	RESISTOR, TEMPERATURE DEPENDENT, PTC, THROUGH HOLE MOUNT, RADIAL LEADED	RESISTOR, TEMPERATURE DEPENDENT, PTC, THROUGH HOLE MOUNT, RADIAL LEADED	RESISTOR, TEMPERATURE DEPENDENT, PTC, THROUGH HOLE MOUNT, RADIAL LEADED	RESISTOR, TEMPERATURE DEPENDENT, PTC, SURFACE MOUNT	RESISTOR, TEMPERATURE DEPENDENT, PTC, SURFACE MOUNT	PTC Thermistor, Surface Mount	RESISTOR, TEMPERATURE DEPENDENT, PTC, THROUGH HOLE MOUNT, RADIAL LEADED
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknown	unknown
其他特性	1.25-1.95 OHMS AT 20 DEG CEL	0.88-1.33 OHMS AT 20 DEG CEL	1.83-2.75 OHMS AT 20 DEG CEL	1.2-3 OHMS AT 20 DEG CEL	0.5-1.4 OHMS AT 20 DEG CEL	1.5-4 OHMS AT 20 DEG CEL	0.4-0.75 OHMS AT 20 DEG CEL
JESD-609代码	e0	e0	e0	e0	e0	e0	e0
制造商序列号	RXE	RXE	RXE	SMD	SMD	MINISMD	BBR
安装特点	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	THROUGH HOLE MOUNT	SURFACE MOUNT	SURFACE MOUNT	SURFACE MOUNT	THROUGH HOLE MOUNT
端子数量	2	2	2	2	2	2	2
最高工作温度	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
最低工作温度	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
封装形状	DISK PACKAGE	DISK PACKAGE	DISK PACKAGE	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	RECTANGULAR PACKAGE	DISK PACKAGE
包装方法	BULK	BULK	BULK	BULK	BULK	BULK	BULK
额定（AC）电压（URac）	72 V	72 V	72 V	60 V	60 V	60 V	90 V
额定功率耗散 (P)	0.45 W	0.49 W	0.41 W	1.5 W	0.7 W	0.6 W	1.7 W
电阻器类型	PTC THERMISTOR	PTC THERMISTOR	PTC THERMISTOR	PTC THERMISTOR	PTC THERMISTOR	PTC THERMISTOR	PTC THERMISTOR
表面贴装	NO	NO	NO	YES	YES	YES	NO
端子面层	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD	TIN LEAD
端子位置	RADIAL	RADIAL	RADIAL	END	END	END	RADIAL
热敏电阻器应用	OVERLOAD PROTECTION	OVERLOAD PROTECTION	OVERLOAD PROTECTION	OVERLOAD PROTECTION	OVERLOAD PROTECTION	OVERLOAD PROTECTION	OVERLOAD PROTECTION
厂商名称	TE Connectivity(泰科)	TE Connectivity(泰科)	TE Connectivity(泰科)	-	-	TE Connectivity(泰科)	TE Connectivity(泰科)
ECCN代码	EAR99	EAR99	EAR99	EAR99	-	EAR99	-
端子形状	WIRE	WIRE	WIRE	-	-	NO LEAD	WIRE