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Product Detailed Parameters
- Description：FIXED IND 2H 200MA 57 OHM CHASS
- Series：157
- Mfr：Hammond Manufacturing
- Package：Bulk
- Type：-
- Material - Core：-
- Inductance：2 H
- Tolerance：±15%
- Current Rating (Amps)：200 mA
- Current - Saturation (Isat)：-
- Shielding：Unshielded
- DC Resistance (DCR)：57Ohm
- Q @ Freq：-
- Frequency - Self Resonant：-
- Ratings：-
- Operating Temperature：-
- Inductance Frequency - Test：-
- Mounting Type：Chassis Mount
- Package / Case：Nonstandard
- Supplier Device Package：-
- Size / Dimension：3.250" L x 1.750" W (82.55mm x 44.45mm)
- Height - Seated (Max)：2.000" (50.80mm)
- Features：-
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Overview
The Hammond Manufacturing 157R is a fixed, unshielded DC reactor and filter choke designed for open channel mounting. It features an inductance of 2H with a tolerance of ±15% and supports a maximum DC current of 200 mA. The component has a DC resistance (DCR) of 57 Ohms, also with a ±15% tolerance, and operates at a maximum voltage of 400V DC. The physical dimensions are approximately 82.6 mm in length, 47.6 mm in width, and 50.7 mm in height. It utilizes solder lug terminals for circuit connection.
Feature Summary
- Fixed inductance design optimized for DC filtering applications
- Open channel mounting configuration for chassis integration
- Unshielded construction to minimize magnetic interference with adjacent components
Applications
- DC power supply input filtering
- Current smoothing in DC circuits
- Electromagnetic interference suppression in low-current DC systems
Procurement Notes
Verify the specific tolerance requirements for inductance and DC resistance against your circuit design specifications before procurement. Confirm that the 200 mA current rating aligns with the maximum operational load of your application. Ensure the open channel mounting style is compatible with your chassis or panel layout constraints.
Selection Notes
Select this component when a fixed 2H inductance is required for DC line filtering with a current capacity of 200 mA. Consider the unshielded nature of the device to ensure adequate spacing from sensitive components. Verify that the 57 Ohm DC resistance does not introduce excessive voltage drop in your specific circuit topology.
Part Context
This part belongs to Hammond Manufacturing's range of fixed inductors and chokes. It serves as a passive component for managing current ripple and noise in direct current circuits. The 157R model is distinct from shielded variants and offers a standard form factor for general-purpose DC filtering tasks.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, ensure the replacement matches the 2H inductance, 200 mA current rating, and 57 Ohm DCR specifications while maintaining compatibility with open channel mounting.
