1540M20

Description：FIXED IND 4.5MH 1.25A 2.64OHM TH
Series：1540
Mfr：Hammond Manufacturing
Package：Bulk

SKU:71517b142ef8 Category: Fixed Inductors Brand: Hammond Manufacturing

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Product introduction

Product Detailed Parameters

Description：FIXED IND 4.5MH 1.25A 2.64OHM TH
Series：1540
Mfr：Hammond Manufacturing
Package：Bulk
Type：Toroidal
Material - Core：-
Inductance：4.5 mH
Tolerance：±15%
Current Rating (Amps)：1.25 A
Current - Saturation (Isat)：-
Shielding：Unshielded
DC Resistance (DCR)：2.64Ohm Max
Q @ Freq：-
Frequency - Self Resonant：-
Ratings：-
Operating Temperature：-
Inductance Frequency - Test：-
Mounting Type：Through Hole
Package / Case：Radial, Vertical (Open)
Supplier Device Package：-
Size / Dimension：1.812" Dia x 0.750" W (46.02mm x 19.05mm)
Height - Seated (Max)：-
Features：-

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1540M20

Overview

The Hammond Manufacturing 1540M20 is a heavy-duty RF choke belonging to the 1540 series. It features an unshielded toroidal core design with radial vertical leads. The component provides an inductance of 4.5 mH (4500 uH). It supports a DC current rating of 0.9 A to 1.25 A, depending on specific datasheet references. The maximum DC resistance is specified as 2.64 Ohms. This industrial-grade inductor is designed for chassis or panel mounting applications requiring robust performance.

Feature Summary

Heavy-duty construction suitable for demanding RF environments
Unshielded toroidal geometry minimizes magnetic interference
Radial vertical lead configuration facilitates standard mounting

Applications

RF choke circuits in industrial control systems
Power supply filtering applications
High-current signal conditioning equipment

Procurement Notes

Verify the specific current rating and DC resistance values against the official manufacturer datasheet prior to procurement, as sources indicate variations between 0.9 A and 1.25 A ratings. Confirm that the unshielded toroidal form factor aligns with the electromagnetic compatibility requirements of the target assembly. Ensure lead spacing matches the PCB or terminal block layout.

Selection Notes

Select this component when high current handling and stable inductance are required in RF applications. The unshielded design necessitates careful placement to avoid coupling with sensitive traces. Compare the 2.64 Ohm DC resistance against circuit loss tolerances. Consider the physical dimensions of the toroid for adequate clearance within the enclosure.

Part Context

This part belongs to the Hammond Manufacturing 1540 series of fixed inductors. These components are engineered for industrial reliability and heavy-duty operation. The series offers various inductance values tailored for power and RF filtering needs. The 1540M20 specifically addresses applications requiring moderate inductance with significant current capacity.