IM04EB390K Equivalent & Substitute Parts

Part Overview

The IM04EB390K is a 39 µH unshielded molded inductor manufactured by Vishay Dale, designed for through-hole axial mounting applications. This component features a 176 mA current rating and 2.6Ohm maximum DC resistance, with an operating temperature range of -55°C to 105°C. The part is classified as obsolete, making identification of compatible substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

IM04EB390K

Vishay DaleIn Stock: 990IM04EB390K Datasheet

Current PartRFQ

1537R-56J

API Delevan Inc.In Stock: 8121537R-56J Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IM04EB390K is determined by strict equivalence across the following critical parameters:

• Inductance Value: 39 µH (exact match required)
• DC Resistance: 2.6Ohm Max (identical specification)
• Core Material: Iron (unshielded molded construction)
• Mounting Configuration: Through-hole axial package
• Physical Dimensions: 0.156" Dia x 0.375" L (3.96mm x 9.53mm)
• Operating Temperature Range: -55°C ~ 105°C
• Frequency Characteristics: Q @ 2.5MHz and self-resonant frequency at 14.5MHz

The substitute part 1537R-56J meets all these core electrical and mechanical requirements. Variations in tolerance and current rating above the minimum threshold do not preclude substitution when the primary electrical parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 1537R-56J from API Delevan Inc. is a direct functional equivalent to the obsolete IM04EB390K. Both components maintain identical inductance values, DC resistance specifications, and frequency characteristics. The substitute part offers improved tolerance (±5% versus ±10%) and higher current rating capacity (198 mA versus 176 mA), providing enhanced performance margins without compromising circuit compatibility.

Both parts maintain full RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards. The active product status of the 1537R-56J ensures long-term availability and supply chain continuity, addressing the obsolescence of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 1537R-56J directly replace the IM04EB390K in existing designs?

A: Yes. Both inductors share identical inductance (39 µH), DC resistance (2.6Ohm Max), core material (iron), and physical dimensions (0.156" Dia x 0.375" L). The through-hole axial mounting configuration is identical, enabling direct PCB footprint compatibility.

Q: What is the significance of the tolerance difference between the two parts?

A: The 1537R-56J features ±5% tolerance compared to the IM04EB390K's ±10% tolerance. This tighter tolerance in the substitute part provides improved inductance accuracy, which may benefit circuit performance in applications sensitive to inductance variation.

Q: Does the higher current rating of the 1537R-56J affect circuit operation?

A: No. The 1537R-56J's 198 mA current rating exceeds the IM04EB390K's 176 mA rating. This provides additional thermal and electrical margin without altering the component's electrical behavior within the original design's operating parameters.

Q: Are there packaging differences between these components?

A: The IM04EB390K is supplied in standard packaging, while the 1537R-56J is available in Tape & Reel (TR) format. Both maintain identical physical dimensions and through-hole axial configuration suitable for the same PCB applications.

Q: What compliance certifications apply to both parts?

A: Both the IM04EB390K and 1537R-56J are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.