BF & BFH
|
Typical Applications
- Surge absorber
- SR element protection
- Electric field intensity regulator
- Capacitor charger
- High voltage equipment loader
- Charging resistor for impulse generator
- High voltage and high resistance circuits
|
Resistor
 |
Descriptions
BF and BFH are the improved versions with the features of our ceramic resistors
well accepted in the market for a long time.
The processes in ceramic tubing coating with the ceramic film, sintering
at a high temperature and helical cutting have simplified the production
of resistors with a large resistance capacity and a high accuracy.
Compared with conventional film resistors, BF and BFH have much larger
allowable injection energy capacity and provide higher voltage charasteristics
which are the ideal to the application shown right.
CHARACTERISTICS
| Item |
BF. BFH Characteristics |
| Working temperature: |
180°C |
| Temperature coefficient: |
-0.17%/°C Max |
| Withstand voltage: (1.2×50 µsec) |
2.5 kV/cm Max (BF) 5.0 kV/cm Max (BFH) |
| Loaded service life (500 hrs rated load) |
±5% Max |
| Short time overload test: |
±2% Max |
| Max operating temperature: |
200 °C |
|
BF STANDARD SPECIFICATIONS
| Type No. |
Rated Power (W) |
Dimensions (mm) ØD |
Ø d |
L |
L1 |
Max Voltage (kV) |
Resistance Value Range (Ohm) |
Allowable Injection Energy (KJ) |
| ER 5BF |
5 |
8.5±0.5 |
- |
60±1.0 |
38±2 |
1.5 |
50k - 20M |
9 |
| ER 10BF |
10 |
14±0.5 |
8 |
80±1.5 |
10±2 |
2.5 |
50k - 20M |
18 |
| ER 20BF |
20 |
20±1.0 |
14 |
100±1.5 |
13±2 |
3.0 |
50k - 20M |
32 |
| ER 30BF |
30 |
20±1.0 |
14 |
150±1.5 |
15±2 |
4.5 |
50k - 20M |
52 |
| ER 40BF |
40 |
20±1.0 |
14 |
200±1.5 |
15±2 |
6.5 |
50k - 20M |
75 |
| ER 70BF |
70 |
25±1.2 |
17 |
250±2.0 |
22±2 |
8.5 |
50k - 20M |
113 |
| ER 80BF |
80 |
25±1.2 |
17 |
300±2.0 |
22±2 |
10.0 |
50k - 20M |
140 |
ER5BF will be supplied with lead wires.
ER10BF through ER80BF will be supplied with terminals as options, if so
requested with an order.
(The details on the terminals are shown at " STANDARD TERMINALS").
|
|
|
BFH STANDARD SPECIFICATIONS (High Withstand Resistance Type)
| Type No. |
Rated Power (W) |
Dimensions (mm) |
Max Voltage (kV) (1.2×50 µsec) |
Resistance Value Range (Ohm) |
Allowable Injection Energy (KJ) |
| ØD |
ØD1 |
Ø d |
L |
L1 |
| ER 10BFH |
10 |
14±0.5 |
16 |
M4 |
90 |
15 |
30 |
250k - 20M |
18 |
| ER 20BFH |
20 |
20±1.0 |
22 |
M4 |
110 |
18 |
35 |
250k - 20M |
32 |
| ER 30BFH |
30 |
20±1.0 |
22 |
M4 |
160 |
20 |
60 |
250k - 20M |
52 |
| ER 40BFH |
40 |
20±1.0 |
22 |
M4 |
210 |
20 |
80 |
250k - 20M |
75 |
| ER 70BFH |
70 |
25±1.2 |
28 |
M4 |
260 |
26 |
100 |
250k - 20M |
113 |
| ER 80BFH |
80 |
25±1.2 |
28 |
M4 |
310 |
26 |
120 |
250k - 20M |
140 |
|
|
|
|
|