Rods (4077292011)

Part Number: 4077292011

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: 4.4 (g)

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.

Dim

mm

mm tol

nominal inch

inch misc.

A

6.35

±0.25

0.25

_

C

28.6

±0.75

1.125

_