Tubular Vitreous Enamelled Wirewound Resistors - TT electronics ...

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124
124
Tubular Vitreous Enamelled
Tubular
Tubular Vitreous
Vitreous Enamelled
Enamelled
Wirewound Resistors
Wirewound Resistors
Tubular Vitreous Enamelled
Wirewound Wirewound Resistors Resistors
Welwyn Components
Welwyn Components
Welwyn Components
1600/1900 Series
1600/1900 Series
1600/1900 Series
Adjustable Resistors (see Figure 9)
partial open winding necessitates a reduced maximum
Adjustable resistors Resistors use the (see same Figure basic 9) construction as fixed partial resistance, open when winding compared necessitates with fixed a reduced resistors, maximum and the
Adjustable Resistors (see Figure 9)
partial open winding necessitates a reduced maximum
Adjustable resistors already resistors described, use the and same have basic a window construction in the as vitreous fixed resistance, range when is compared also defined with in fixed Table resistors, 4.
and the
Adjustable resistors use the same basic construction as fixed resistance, when compared with fixed resistors, and the
resistors enamel through already described, which contact and is have made a window to the resistive in the vitreous resistance resistors already described, and have a window in the vitreous resistance
More than
range range
one adjusting
is also defined is also defined
band can
in Table in Table
be fitted,
4.
4.
up to the
enamel element through by a sliding which contact contact band. is made The band to the is resistive fitted with a More maximum than number one adjusting specified band in Table can be 3. fitted, up to the
enamel
element through which contact is made to the resistive
clamping by screw a sliding and nut contact to retain band. it The firmly band in position. is fitted with a More
maximum than one adjusting band can be fitted, up to the
element by a sliding contact band. The band is fitted with a maximum
Adjustable
number number
resistors
specified specified
are available
in Table in Table
in termination
3.
3.
styles B, 4B,
clamping clamping
The adjustable
screw screw
winding
and nut and nut
style
to retain to retain
has a
it it
maximum
firmly in position.
firmly in position.
permissible hot Adjustable AP, C, CB and resistors CP, in are sizes available 1602 to in 1609 termination inclusive styles and B, 1906 4B,
The spot adjustable temperature winding of 300°C style and has the a maximum permissible dissipation, hot for
Adjustable
AP, resistors are available in termination styles B, 4B,
and C, 1908 CB and denoted CP, in by sizes prefix 1602 ‘V’. to 1609 inclusive and 1906
The
spot adjustable winding style has a maximum permissible hot
an ambient temperature temperature of 300°C of 20°C, and the is maximum specified in dissipation, Table 4. The for AP,
and C, 1908
CB and denoted
CP, in by
sizes prefix
1602 ‘V’.
to 1609 inclusive and 1906
spot
an ambient temperature
temperature of 300°C
of 20°C, and the
is maximum
specified in dissipation,
Table 4. The
for and 1908 denoted by prefix ‘V’.
an ambient temperature of 20°C, is specified in Table 4. The
Table 3
Table 3
Table Tube A mm B mm Hole C Max. no of
Tube size A max. mm B max. mm dia. Hole mm C Max. adjusting no of
Tube
size A
max. mm B
max. mm
dia. Hole
mm C Max.
adjusting
no of
bands
size max. max. dia. mm adjusting
1602
bands
bands
1602 1603 20 27 3.2 1
1602
1603 1906
20 27 3.2 1
1603 20 27 3.2 1
1906 1604
1906
1604 1605 20 27 3.2 3
1604
1605 1908 20 25 27 32 3.2 3.7 32
1605 20 27 3.2 3
1908 1606 25 32 3.7 24
1908 25 32 3.7 2
1606 1607 25 30 32 38 3.7 42
1606 25 32 3.7 4
1607 1608 30 38 3.7 23
1607 30 38 3.7 2
1608 1609 30 38 3.7 35
1608 30 38 3.7 3
1609 30 38 3.7 5
1609 30 38 3.7 5
Table 4
Table 4
Table Max. dissipation in
Resistance range (ohms)
20°C Max. ambient dissipation (watts) in
Resistance range (ohms)
Type
20°C Max.
ambient dissipation
(watts)
in
Resistance range (ohms)
Min. for Min. for Max. for
Type
20°C ambient (watts)
Min. for Min. for Max. for
Type
200°C 300°C styles VC, all other all styles
200°C 300°C styles Min. for
VC, all Min.
other for Max.
all styles
for
hot spot hot spot VCP styles
hot 200°C
spot hot 300°C
spot styles
VCP VC, all
styles
other all styles
1602 8 15.5 4 3 1.6k
hot spot hot spot VCP styles
1602 1906 9.5 8 15.5 19 4 3 2.5k 1.6k
1602 8 15.5 1.6k
1906 1603 9.5 11 19 22 46 36 2.5k 3.0k
1906 9.5 19 4 3 2.5k
1603 1604 11 16 22 31 68 68 3.0k 5.3k
1603 11 22 6 6 3.0k
1604 1605 16 21 31 41 86 86 5.3k 4.5k
1604 16 31 8 8 5.3k
1605 1908 21 24 41 47 11 6 10 6 4.5k 7.5k
1605 21 41 6 6 4.5k
1908 1607 24 34 47 66 11 10 9 7.5k 8.1k
1908 24 47 11 10 7.5k
1607 1606 34 41 66 80 11 14 13 9 13.2k 8.1k
1607 34 66 11 9 8.1k
1606 1608 41 52 101 80 14 17 13 16 13.2k 15.4k
1606 41 80 14 13 13.2k
1608 1609 52 74 101 145 17 25 16 24 15.4k 25.5k
1608 52 101 17 16 15.4k
1609 74 145 25 24 25.5k
1609 74 145 25 24 25.5k
Manufactured Values
Manufactured E24 preferred Values
Manufactured E24 preferred
Values
E24 preferred
Standard Selection Tolerance ±10%
Standard All other details Selection of the electrical Tolerance and environmental ±10%
Standard All other details Selection of the electrical Tolerance and environmental
±10%
performance of adjustable resistors are the same as for
All
performance other details
of adjustable of the electrical
resistors and
are environmental
fixed resistors.
the same as for
performance
fixed resistors.
of adjustable resistors are the same as for
fixed resistors.
General Note
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