Rods (4077122011)
Part Number: 4077122011
77 ROD
Explanation of Part Numbers:
– Digits 1 & 2 = Product Class
– Digits 3 & 4 = Material Grade
Pressed Fair- Rite rods are used extensively in high- energy storage designs.
These rods can also be used for inductive components that require temperature stability or have to accommodate large dc bias
requirements.
Figure 2 rods have a 0.6 mm (0.024 ) maximum chamfer on the end faces.
For frequency tuned rod designs see section Antenna/ RFID Rods .
For any rod requirement not listed here, feel free to contact our customer service group for availability and pricing.
The
A
dimension can be centerless ground to tighter tolerances.
Weight: 1 (g)
Dim mm mm tol
nominal inch
inch misc.
A
C
3.25 -0.25
25.4 ±0.75
0.125
1
_
_
Figure 1 shows the rod permeability as a function of the length to diameter ratio for the six materials available in rods.
Figures 3, 4 and 5 illustrate typical temperature behavior of wound rods. Would rods in 33 and 77 material yield the best
temperature stable inductors, see Figure 4. Both show a typical inductance change of <1% over the -40° to 120°C
temperature range. The parts have a L/ D ratio of 8.1. Lower ratios will change less. This is shown in detail in Figure 5 for
the same 52 material but with the L/ D ratio as the parameter. A lower ratio means a lower rod permeability but with
improved temperature stability.