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Product Detailed Parameters
- Description：FIXED IND 75UH 166MA 3.7 OHM TH
- Series：1537R
- Mfr：Delevan
- Package：Tape & Reel (TR)
- Type：Molded
- Material - Core：Iron
- Inductance：75 µH
- Tolerance：±5%
- Current Rating (Amps)：166 mA
- Current - Saturation (Isat)：-
- Shielding：Unshielded
- DC Resistance (DCR)：3.7Ohm Max
- Q @ Freq：55 @ 2.5MHz
- Frequency - Self Resonant：10.5MHz
- Ratings：-
- Operating Temperature：-55°C ~ 105°C
- Inductance Frequency - Test：2.5 MHz
- Mounting Type：Through Hole
- Package / Case：Axial
- Supplier Device Package：-
- Size / Dimension：0.156" Dia x 0.375" L (3.96mm x 9.53mm)
- Height - Seated (Max)：-
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Overview
The Delevan 1537R-70J is a leaded RF inductor from the 1537/R series, featuring a molded unshielded coil design. It offers an inductance of 75 uH with a tolerance of 5% and a maximum DC resistance of 3.7 Ohms. The component supports a maximum DC current of 166 mA and achieves a minimum Q factor of 55. Its self-resonant frequency is 10.5 MHz, suitable for radio frequency applications. Physical dimensions include a length of 9.53 mm and a diameter of 3.96 mm, utilizing axial termination for PCB mounting.
Feature Summary
- Molded unshielded coil construction for stable RF performance
- Axial leaded termination for standard PCB integration
- Optimized for high-frequency operation with defined self-resonant characteristics
Applications
- Radio frequency circuit filtering
- Impedance matching networks
- RF signal processing stages
Procurement Notes
Verify the specific tolerance suffix (J for 5%) against schematic requirements to ensure compatibility with circuit precision needs. Confirm that the axial lead form factor aligns with available board space and automated assembly equipment capabilities. Cross-reference the manufacturer part number with official API Delevan documentation to validate current production status and datasheet revisions before finalizing procurement orders.
Selection Notes
Select this component when a 75 uH inductance value is required within radio frequency designs. Ensure the operating environment remains within the specified temperature range of -55 C to +125 C. Evaluate the 166 mA current limit against peak circuit loads to prevent saturation. Consider the unshielded nature of the coil regarding potential electromagnetic interference with adjacent sensitive components on the printed circuit board layout.
Part Context
This component belongs to the Delevan 1537/R series of fixed inductors designed specifically for radio frequency applications. The series utilizes a molded construction technique to provide mechanical stability and consistent electrical parameters. As a leaded device, it bridges traditional through-hole manufacturing methods with modern RF circuit demands, offering a reliable solution for discrete inductive elements in consumer and industrial electronics.
Replacement Considerations
The 1537R-70H serves as a direct substitute within the same series, differing only in tolerance specifications. Verify that the tighter 3% tolerance of the H variant does not introduce unnecessary cost or availability constraints if the original 5% tolerance was sufficient for the design.
