V23832-T2431-M101

V23832-R421-M101

Technical Data

Data Sheet

26

2003-11-19

Thermal Characteristics

The thermal behaviour of PAROLI modules (transmitter and receiver) depends on the

operating conditions for different applications.

The following table gives a guideline for system designers.

The thermal resistance R

can be used for calculating the module case temperature under different operating

conditions and is displayed for two different module options:

a) Baseplate module without heat sink.

b) Baseplate module with customer designed heat sink

(e.g. height = 9 mm, length = 41 mm, width = 18 mm, no. of cooling fins = 9).

Link Length

The link length calculations are based on the most conservative assumption of PAROLI

modules working on their worst case specification limits. Multimode fibers of different

types (modal bandwidth at 850 nm) are shown. The stated link length is valid under all

specified operating conditions and includes 2 dB of additional connector loss.

Air Velocity

1)

1)

The air velocity is applied along the shortest side of the module in parallel to the direction of the heat sinks.

0 m/s

1.5 m/s

3 m/s

4 m/s

Unit

R

23.3

10.3

8.6

7.5

K/W

R

20.0

5.2

4.2

4.0

K/W

Fiber Type

Diameter

Core/Cladding

[µm]

Modal

Bandwidth

[MHz*km]

Link

Distance

at 0.5 Gbit/s

[m]

Link

Distance

at 1.25 Gbit/s

[m]

Link

Distance

at 2.5 Gbit/s

[m]

Link

Distance

at 2.7 Gbit/s

[m]

62.5 / 125

200

850

360

165

145

62.5 / 125

400

1300

640

300

270

R

th

T

case

T

ambient

–

P

el

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