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BF1906-10RGI [TTELEC]

Tubular Vitreous Enamelled Wirewound Resistors; 管状釉瓷线绕电阻器
BF1906-10RGI
型号： BF1906-10RGI
厂家： TT Electronics    TT Electronics
描述：

Tubular Vitreous Enamelled Wirewound Resistors
管状釉瓷线绕电阻器

电阻器 线绕电阻器
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Tubular Vitreous Enamelled  
Wirewound Resistors  
Welwyn Components  
1600/1900 Series  
•
Impervious lead free vitreous enamel coating  
• Can be supplied with fixed, adjustable,  
tapped or low inductance winding  
• Seven termination styles with choice of  
mounting arrangements  
• Manufactured RoHS compliant  
Pb-free terminations*  
* Check status of stock when ordering  
General Information  
Vitreous enamelled wirewound resistors are capable of  
withstanding a higher dissipation size for size, than any other  
protected type; this is attributable to the higher operating  
temperature which the wire and enamel can withstand.  
Vitreous enamel provides exceptionally good protection to the  
wire element and is essentially impervious to moisture. The  
resistors can safely be used in harsh environmental conditions.  
chromium resistance wires and specially formulated enamel to  
ensure that the resistors can withstand repeated heat cycling  
without damage.  
Connections between the resistance element and end  
terminations are welded; other connections are brazed.  
Mounting devices are available which permit resistors to be  
mounted by both ends or by one end. Single ended mounting  
is recommended for applications which do not subject the  
resistor to shock or vibration.  
The Welwyn range is based on thirteen sizes of tube, each of  
which has a recommended maximum dissipation which limits  
operating surface temperature to a maximum of 375°C.  
Ferrules and the F type mounting plug are anchored into the  
tubes with high temperature adhesive.  
The stability and high reliability of Welwyn tubular vitreous  
resistors is a direct result of the best quality materials being  
used in their construction.  
Special requirements, for types or styles not described  
in this brochure, will be considered for economic  
quantities.  
High purity ceramic tubes have been matched with nickel  
Electrical Data  
1601  
1905  
1600  
1602  
17  
1906  
1603  
1604  
Power rating at 70°C  
Resistance range  
watts  
11  
16  
16.5  
22  
25  
35  
ohms  
volts  
See Table 1  
See Table 1  
Limiting element voltage  
TCR (-55 to +200°C)  
Resistance tolerance  
Values  
ppm/°C  
%
Typically: <+75  
1, 2, 5, 10  
Maximum + 200  
See table 1 for value restrictions  
E24 preferred  
Thermal impedance  
Operating temperature range  
°C/watt  
°C  
See fig. 1  
-55 to +375  
1605  
1908  
1607  
76  
1606  
1608  
1609  
Power rating at 70°C  
Resistance range  
watts  
ohms  
volts  
47  
54  
91  
115  
165  
See Table 1  
See Table 1  
Limiting element voltage  
TCR (-55 to +200°C)  
Resistance tolerance  
Values  
ppm/°C  
%
Typically: <+75  
1, 2, 5, 10  
Maximum + 150  
See table 1 for value restrictions  
E24 preferred  
See fig. 1  
Thermal impedance  
Operating temperature range  
°C/watt  
°C-55 to +375  
Note See Figure 1 for curves of temperature rise / watts dissipation.  
General Note  
Welwyn Components reserves the right to make changes in product specification without notice or liability.  
A subsidiary of  
All information is subject to Welwyn’s own data, relates to current manufacture and is considered accurate at time of going to print.  
TT electronics plc  
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
121  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
Electrical Data (continued)  
Table 1  
*Dissipation (watts) to  
produce operating  
Resistance range (ohms)  
Limiting  
Low inductance  
winding resistance  
range (ohms)  
element  
voltage  
hotspot temperature (°C) of:  
Ambient = 20°C  
Ambient  
= 70°C  
Minimum  
Termination  
style  
Min. res. at  
resistance at  
Max. at  
any  
Max. at  
Type  
either  
200  
5
300  
10  
375  
375  
11  
5%  
1
2%  
15  
15  
15  
20  
20  
20  
20  
30  
30  
30  
30  
30  
35  
1%  
25  
30  
30  
25  
30  
30  
60  
40  
40  
50  
40  
50  
50  
tolerance  
15k  
C
All others  
150  
10%  
10  
10  
10  
10  
10  
10  
15  
15  
10  
15  
15  
20  
30  
5%  
50  
50  
50  
50  
50  
50  
50  
50  
50  
50  
50  
50  
100  
tolerance  
1601  
1905  
1600  
1602  
1906  
1603  
1604  
1605  
1908  
1607  
1606  
1608  
1609  
14  
20  
250  
-
1.3k  
3.5k  
5.0k  
4.0k  
5.5k  
7.5k  
11.5k  
14k  
7
14.5  
15  
16  
1
30k  
450  
7.5  
8
21  
16.5  
17  
1
56k  
-
600  
15.5  
19  
22  
1
43k  
500  
700  
850  
1300  
1100  
1200  
1300  
2100  
2100  
3000  
350  
9.5  
11  
15.5  
21  
24  
34  
41  
52  
74  
28  
22  
1
50k  
550  
22  
32  
25  
1
83k  
750  
31  
45  
35  
1
100k  
100k  
100k  
100k  
160k  
180k  
250k  
1000  
900  
41  
59  
47  
1
47  
68  
54  
1
1000  
900  
16k  
66  
95  
76  
1
22k  
80  
115  
145  
208  
91  
1
1900  
1800  
2500  
32k  
101  
145  
115  
165  
1
38k  
1
58k  
*The stated dissipation applies to resistors mounted horizontally with unobstructed bore.  
Performance Data  
Max  
Typ  
Load : 1000 hours at 70°C  
Shelf life : 12 months at room temperature  
Climatic  
∆R%  
∆R%  
∆R%  
∆R%  
∆R%  
∆R%  
5.0  
1.0  
0.5  
0.2  
0.1  
zero  
3.5  
0.1  
0.35  
0.05  
0.02  
zero  
Long term damp heat  
Bump and vibration  
Noise (in a decade of frequency)  
Pulse Handling Data  
Available by request  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
122  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
Physical Data  
Table 2 Dimensions in millimetres. See fig 2-8 for styles  
A
B
C
D
nom  
4.5  
4.5  
4.5  
4.5  
4.5  
4.5  
4.5  
5.7  
5.7  
7.0  
5.7  
7.0  
7.0  
E
F
G
nom  
15  
10  
10  
15  
15  
15  
15  
17  
17  
22  
17  
22  
22  
H
J
K
Type  
max  
33.0  
56.1  
61.5  
51.0  
64.3  
74.5  
102  
89.5  
102  
102  
166  
152  
216  
max  
17.5  
14.5  
14.5  
17.5  
17.5  
17.5  
17.5  
24.0  
24.0  
32.0  
24.0  
32.0  
32.0  
max  
8.2  
max  
5.0  
5.0  
5.0  
5.0  
5.0  
5.0  
5.0  
6.8  
6.8  
9.8  
6.8  
9.8  
9.8  
max  
19.5  
17.5  
17.5  
19.5  
19.5  
19.5  
19.5  
26.5  
26.5  
32.0  
26.5  
32.0  
32.0  
.25  
3.0  
3.0  
3.0  
3.0  
3.0  
3.0  
3.0  
4.0  
4.0  
6.4  
4.0  
6.4  
6.4  
max  
59  
1601  
1905  
1600  
1602  
1906  
1603  
1604  
1605  
1908  
1607  
1606  
1608  
1609  
M3  
M3  
M3  
M3  
M3  
M3  
M3  
M4  
M4  
M6  
M4  
M6  
M6  
6.55  
6.55  
8.2  
-
-
77  
8.2  
90  
8.2  
101  
128  
122  
134  
134  
198  
184  
248  
8.2  
13.2  
13.2  
19.2  
13.2  
19.2  
19.2  
Terminations  
Styles B, 4B, AP and AW are available in all 13 tube sizes.  
Ferrule, electrically isolated (Figure 6) Connection to  
resistor via Pb free solder coated nickle iron lugs. Denoted  
by prefix CB, thus: CB1602.  
Styles C, CB and CP are available in sizes 1601 to 1609  
inclusive, 1906 and 1908  
Ferrule, electrically live (Figure 7) Nickel plated brass.  
Denoted by prefix C, thus: C1602.  
Lugs (Figure 2): Pb free solder coated nickel iron. Denoted  
by prefix B to size reference, thus B1602  
Ferrule, electrically isolated (Figure 8): Connection to  
resistor via pigtails of 14/.193 mm copper, 150mm  
minimum length. Denoted by prefix CP thus: CP1602  
Pigtails (Figure 3): 14/.193 mm copper, 150 mm minimum  
length. Denoted by prefix AP, thus AP1602  
Rigid wires (Figure 4): 1.2 mm diameter tinned copper, 32  
mm minimum length.  
Marking The resistors are legend marked with type  
reference, resistance value, tolerance and manufacturing  
date code. Value marking conforms to IEC 62.  
Denoted by prefix AW, thus: AW1602  
Lugs with screws, nuts and washers (Figure 5): Nickel  
plated brass screws and nuts. Denoted by prefix 4B,  
thus: 4B1602.  
Solvent resistance: The vitreous coating and marking are  
resistant to all accepted industrial cleaning fluids.  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
123  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
partial open winding necessitates a reduced maximum  
resistance, when compared with fixed resistors, and the  
resistance range is also defined in Table 4.  
Adjustable Resistors (see Figure 9)  
Adjustable resistors use the same basic construction as fixed  
resistors already described, and have a window in the vitreous  
enamel through which contact is made to the resistive  
element by a sliding contact band. The band is fitted with a  
clamping screw and nut to retain it firmly in position.  
More than one adjusting band can be fitted, up to the  
maximum number specified in Table 3.  
Adjustable resistors are available in termination styles B, 4B,  
AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906  
and 1908 denoted by prefix ‘V’.  
The adjustable winding style has a maximum permissible hot  
spot temperature of 300°C and the maximum dissipation, for  
an ambient temperature of 20°C, is specified in Table 4. The  
Table 3  
Tube  
size  
A mm  
max.  
B mm  
max.  
Hole C  
Max. no of  
adjusting  
bands  
dia. mm  
1602  
1603  
1906  
1604  
1605  
1908  
1606  
1607  
1608  
1609  
20  
27  
3.2  
1
20  
25  
25  
30  
30  
30  
27  
32  
32  
38  
38  
38  
3.2  
3.7  
3.7  
3.7  
3.7  
3.7  
3
2
4
2
3
5
Table 4  
Max. dissipation in  
Resistance range (ohms)  
20°C ambient (watts)  
Type  
Min. for  
styles VC,  
VCP  
Min. for  
all other  
styles  
Max. for  
all styles  
200°C  
300°C  
hot spot  
8
hot spot  
15.5  
19  
1602  
1906  
1603  
1604  
1605  
1908  
1607  
1606  
1608  
1609  
4
4
3
3
1.6k  
2.5k  
9.5  
11  
22  
6
6
3.0k  
16  
31  
8
8
5.3k  
21  
41  
6
6
4.5k  
24  
47  
11  
11  
14  
17  
25  
10  
9
7.5k  
34  
66  
8.1k  
41  
80  
13  
16  
24  
13.2k  
15.4k  
25.5k  
52  
101  
145  
74  
Manufactured Values  
E24 preferred  
Standard Selection Tolerance 10ꢀ  
All other details of the electrical and environmental  
performance of adjustable resistors are the same as for  
fixed resistors.  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
124  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
Tapped Resistors See Figure 10  
Ordering Procedure  
Enquiries for tapped resistors must state the following details:  
Fixed resistors can be supplied with taps to special order.  
Because of the reduced winding length, the total resistance of  
a tapped resistor will be less than can be offered on a fixed  
resistor of the same size. The reduction is proportional to the  
number of taps and Table 5 is intended as a guide.  
Resistance per section  
Maximum dissipation per section  
Maximum operating ambient temperature  
Maximum permissible dimensions if important  
Type of terminations required. (See ‘Terminations’, page 3)  
Resistor style or proposed method of mounting.  
The minimum resistance per section on all sizes is 1Ω and the  
standard selection tolerance for any section is 10%  
Table 5  
Maximum*  
total  
dissipation  
in 20°C  
Maximum*  
resistance  
with single  
tap  
Maximum*  
number  
of taps  
ambient  
(ohms)  
(watts) with  
single tap  
Type  
1905  
1600  
1602  
1906  
1603  
1604  
1605  
1908  
1607  
1606  
1608  
1609  
14.5  
15.0  
15.5  
19.0  
22  
9k  
12k  
9k  
1
1
1
1
1
2
2
2
2
4
4
4
13k  
18k  
29k  
34k  
38k  
53k  
78k  
93k  
140k  
31  
41  
47  
66  
80  
*Maximum total dissipation assumes that this will be  
evenly spread over the total element length.  
101  
145  
The recommended dissipations for each of the resistor hot  
spot temperatures applies to resistors mounted horizontally. If  
the bore is completely blocked a 15% derating is  
recommended. However, wherever possible, resistors should  
be mounted vertically with unobstructed bore.  
Low Inductance Resistors  
Ayrton-Perry wound elements are supplied for low inductance  
applications. This winding style has a maximum permissible  
hot spot temperature of 300°C. The maximum dissipation is  
defined in Table 1 under the heading Operating hot spot  
temperature of 300°C, and resistance ranges are defined in  
the three right-hand columns of this table.  
This makes best use of the chimney effect of the heated tube  
and will encourage a cooling stream of air through the bore.  
Allowances must be made, when tubular resistors are mounted  
in banks, for the effects produced by radiation between tubes.  
Application Notes  
Appreciable reduction of hot spot temperature can be  
achieved by arranging that resistors are subjected to some  
measure of forced draught. In general, it is most efficient to  
extract air from the resistor enclosure and arrange that an air  
inlet is adjacent to the bottom of the tubes.  
When cold, vitreous enamel has excellent insulation resistance.  
In common with all insulants the specific resistance of the  
enamel decreases with increased temperature; therefore, if  
operated at any temperature approaching the maximum, the  
resistor cannot be classed as an insulated type and should not  
be used in contact with any conducting materials.  
If soft soldered connections are used the resistors should be derated  
where applicable to limit the hot spot temperature to 300°C.  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
123  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
Table 6 mounting clip dimension (mm) See Fig. 11  
Clip Type  
A
B
C
D
E
F
G
H
J
K
Auxiliary  
ref. type nom. max nom. max max max 0.2 dia dia nom locking  
spring ref  
1601 52  
1602 70  
68  
86  
MD1 1603 90 106 29 19 17.5 14.5 4.8 4.0 3.9 7.2  
MD16  
MD4 1604 121 137  
1605 108 128  
1906 83  
99  
Ordering Procedure  
1607 125 146  
Mounting clips (and auxiliary locking  
springs when required) should be ordered  
in units and the type reference specified.  
MD3 1608 176 197 49 33 32.0 19.0 6.4 4.0 6.3 9.5  
MD6 1609 240 261  
MD18  
These mounting clips are suitable for termination styles C, CB and CP.  
MD4, 5 and 6 have an ear formed in the bottom surface of the bracket to  
prevent rotation of the mounting plate. The auxiliary locking springs  
ensure positive retention of the tube under severe mechanical shock  
conditions. See Figure 11.  
Table 7 Mounting brackets dimensions (mm). See Fig. 12.  
Bracket  
ref.  
Type  
A
nom  
B
nom  
C
nom  
D
nom  
E
nom  
MD40  
1600  
1905  
1601  
1602  
1603  
1604  
1906  
1605  
1606  
1908  
1607  
1608  
1609  
78  
73  
92  
87  
10  
20  
4.2  
50  
64  
68  
82  
MD41  
MD42  
91  
105  
133  
95  
13  
20  
4.2  
119  
81  
106  
183  
119  
121  
171  
235  
120  
197  
133  
143  
193  
257  
20  
28  
25  
30  
5.2  
5.2  
Ordering Procedure  
Mounting brackets should be ordered in  
units and the type reference specified.  
MD43  
These brackets are suitable for termination styles B, 4B, AP & AW  
Table 8 Mounting plug dimensions (mm) See Fig. 13.  
Type  
A
B
C
Min.  
Max.  
1601  
1602  
1603  
1604  
1906  
1605  
1606  
1908  
1607  
1608  
1609  
1.6  
3.7  
5.3  
M4  
1.6  
3.2  
3.7  
5.2  
5.3  
6.8  
M5  
M6  
Ordering Procedure  
Mounting plugs are denoted by the prefix  
‘F’ added to the size reference;  
e.g. BF1602 and APF1602.  
F type bushes are suitable for termination styles B, 4B AP and AW  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  
126  
Tubular Vitreous Enamelled  
Wirewound Resistors  
1600/1900 Series  
Welwyn Components  
Ordering Procedure  
Specify the full type reference, resistance value and tolerance, using IEC 62 code references.  
The addition of L to the prefix describing terminal configuration indicates Ayrton-Perry winding.  
Example: Electrically live ferrule terminated 1601 size at 10 ohms and 5% -  
C
1601  
-
10R  
J
I
Adjustable Option  
Fixed  
V
Adjustable  
Termination Style  
B
AP AW 4B CB  
C
CP  
See Figures 2 to 8  
Winding & Mounting Options  
Standard  
L
F
Low Inductabce  
Mounting plug  
Tube Size  
Value (USE IEC62 code)  
Tolerance (use IEC62 code)  
F
G
J
1%  
2%  
5%  
K
10%  
Packing  
I
Box  
Standard  
Note - consult data sheet in detail for valid combinations.  
Minimium Ordering Quantity: 10  
Order Multiple: 1  
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK  
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com  
Issue E · 10.05  

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