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BCD20009-G Rev F, 20-Nov-2020

Page 13 of 16

IMX35 Series

35 Watt Quad-Output DC-DC Converter

© 2020 Bel Power Solutions & Protection

Immunity to Environmental Conditions

Table 12: Mechanical and climatic stress

Test method

Standard

Test Conditions

Status

Cab Damp heat

steady state

IEC/EN 60068-2-78

MIL-STD-810D section 507.2

Temperature:

Converter

not operating

Relative humidity:

Duration:

56 days

Ka

Salt mist test

(sodium chloride

EN 50155:2007

clause 12.2.10

Temperature:

Converter

not operating

Duration:

48 h

Fc

Vibration

(sinusoidal)

IEC/EN 60068-2-6

MIL-STD-810D section 514.3

Acceleration amplitude:

0.35 mm (10 – 60 Hz)

5 g

2

(60 - 2000 Hz) Converter

operating

Frequency (1 Oct/min):

10 – 2000 Hz

Test duration:

7.5 h (2.5 h in each axis)

Fh

Random vibration

road-band (digital

control) & guidance

IIEC/EN 60068-2-64

Acceleration spectral density: 0.05 g

n

2

/Hz

Converter

operating

Frequency band:

8 to 500 Hz

Acceleration magnitude:

4.9 g

n rms

Test duration:

1.5 h (0.5 h in each axis)

Ea

Shock

(half-sinusoidal)

IEC/EN 60068-2-27

MIL-STD-810D section 516.3

Acceleration amplitude:

50 g

2

Converter

operating

Bump duration:

11 ms

Number of bumps:

18 (3 in each direction)

-

Shock

EN 50155:2007 clause 12.2.11

EN 61373 sect. 10, class B,

Acceleration amplitude:

5.1 g

n

Converter

operating

Bump duration:

30 ms

Number of bumps:

18 (3 in each direction)

-

Simulated long life

testing at increased

random vibration

levels

EN 50155:2007 clause 12.2.11

EN 61373 sect. 8 and 9,

Acceleration spectral density: 0.02 g

n

2

/Hz

Frequency band:

5 to 150 Hz

Converter

operating

Acceleration magnitude:

0.8 g

n rms

Test duration:

15 h (5 h in each axis)

1

Body mounted = chassis of a railway coach

2

Models without option Z

Temperatures

Table 13: Temperature specifications, valid for air pressure of 800 to 1200 hPa (800 to 1200 mbar)

Model

-8

Unit

Characteristics

Conditions

min

typ

max

T

A

Ambient temperature

°C

T

C

T

C Z

T

S

Storage temperature

Non operational

- 55

85

1

See Thermal Considerations

2

Temperature measurement point; see Mechanical Data

3

Start-up at –55 °C

Reliability

Table 14: MTBF at nom. load

Ratings

Ground benign

Ground fixed

Ground mobile

Unit

Model

Standard

40 °C

40 °C

70 °C

50 °C

40IMX35 MIL-HDBK-217F, T

C

336 000

141 000

86 000

110 000

396 000

h

110IMX35 Bellcore, T

A

1 445 000

529 000

294 000

144 000

1

The device hours are based upon the IMX35 series field failure rate recorded between 2000 and 2005