Littelfuse 250S Series Manual do Utilizador descarregar pdf (Página 1)

Revised: July 29, 2012

POLY-FUSE

Resettable PTCs

250S Series

Surface Mount > 250S Series

250S Series

Speciﬁcations are subject to change without notice.

Please refer to www.littelfuse.com/series/250S.html for current information.

The 250S High Voltage Radial device is a Polymer-based

PTC suitable to protect telephony equipment against

lightining and power cross strikes. The 250S Series is

fully compatible with telecommunications standards, and

is offered in horizontal and new vertical surface mount

package.

Agency Approvals

AGENCY AGENCY FILE NUMBER

E183209

Electrical Characteristics

Part Number

Device

Mounting

Layout

hold

(A)

trip

(A)

max

int

)

max

(A)

typ.

(W)

Time to Trip at 1A Resistance

Agency

Approvals

Typical

(Sec.)

Maximum

(Sec.)

min

(Ω)

max

(Ω)

1max

(Ω)

250S130

Horizontal

0.13 0.26 250/60 3 1.2 0.9 4.0 4 13 20 –

250S130–RA 0.13 0.26 250/60 3 1.2 1.4 4.0 6.5 10 15 –

250S130–RB 0.13 0.26 250/60 3 1.2 0.7 4.0 9 13 20 –

250S130–RC 0.13 0.26 250/60 3 1.2 1.1 4.0 7 11 17 –

250S130V Vertical 0.13 0.26 250/60 3 1.2 2.0 4.0 4 13 20 –

hold

= Hold current: maximum current device will pass without tripping in 20°C still air.

trip

= Trip current: minimum current at which the device will trip in 20°C still air.

int

= Maximum voltage the device can withstand without damage at rated current (I max)

= The device regular operation voltage

max

= Maximum fault current device can withstand without damage at rated voltage (V

max

)

= Power dissipated from device when in the tripped state at 20°C still air.

min

= Minimum resistance of device in initial (un-soldered) state.

max

= Maximum resistance of device in initial (un-soldered) state.

1max

= Maximum resistance of device at 20°C measured one hour after tripping.

Caution: Operation beyond the speciﬁed rating may result in damage and possible arcing

and ﬂame.

Description

Features

Applications

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standards

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inspectability

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250S Series

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Equipment (CPE)

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telecom centers

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1 2 3 4 5

Resumo do Conteúdo

Página 1 - 250S Series

Página 2 - Time in Seconds

Página 3

Página 4 - 250 S 130 -RA D R

Página 5

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