IM04EB6R8K Equivalent & Substitute Parts

Part Overview

The IM04EB6R8K is a 6.8 µH unshielded molded inductor manufactured by Vishay Dale, rated for 395 mA maximum current with 500mOhm DC resistance. This through-hole axial component operates across -55°C to 105°C and is designed for general-purpose RF and power applications requiring fixed inductance values. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Inductance	6.8 µH
Tolerance	±10%
Current Rating	395 mA
DC Resistance (DCR)	500mOhm Max
Core Material	Iron
Shielding	Unshielded
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.156" Dia x 0.375" L (3.96mm x 9.53mm)
Operating Temperature	-55°C ~ 105°C
Q @ Frequency	50 @ 7.9MHz
Frequency - Self Resonant	55MHz

Substitute Part Grouping Explanation

Substitution eligibility for the IM04EB6R8K is determined by the following critical parameters:

Inductance Value: 6.8 µH (exact match required)
Tolerance: ±10% (exact match required)
Core Material: Iron (exact match required)
Shielding: Unshielded (exact match required)
Package / Case: Axial (exact match required)
Mounting Type: Through Hole (exact match required)
Physical Dimensions: 0.156" Dia x 0.375" L (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
DC Resistance: 500mOhm Max (exact match required)
Q @ Frequency: 50 @ 7.9MHz (exact match required)
Self Resonant Frequency: 55MHz (exact match required)

All substitute parts listed below meet these critical electrical and mechanical parameters. Current rating variations are permitted where the substitute part meets or exceeds the original specification.

Parameter Comparison

Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (Max)	Core Material	Shielding	Package	Dimensions	Operating Temp	Product Status	Packaging Type
IM04EB6R8K	Vishay Dale	6.8 µH	±10%	395	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Obsolete	-
1537R-32K	API Delevan Inc.	6.8 µH	±10%	450	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Active	Tape & Reel (TR)
1537-32K	API Delevan Inc.	6.8 µH	±10%	450	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Active	Cut Tape (CT)
ER1537-32KM	API Delevan Inc.	6.8 µH	±10%	395	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Active	Tape & Reel (TR)
ER1537-32KP	API Delevan Inc.	6.8 µH	±10%	395	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Active	Tape & Reel (TR)
ER1537-32KR	API Delevan Inc.	6.8 µH	±10%	395	500mOhm	Iron	Unshielded	Axial	0.156" Dia x 0.375" L	-55°C ~ 105°C	Active	Tape & Reel (TR)

Engineering Selection Recommendations

All substitute parts listed are manufactured by API Delevan Inc. and maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete IM04EB6R8K.

Current Rating Consideration: The 1537R-32K and 1537-32K variants provide 450 mA current rating, exceeding the original 395 mA specification. These parts are suitable for applications where the original current rating is sufficient, as the higher rating provides additional design margin.

Exact Current Match: The ER1537-32KM, ER1537-32KP, and ER1537-32KR variants maintain the original 395 mA current rating, providing direct electrical equivalence to the IM04EB6R8K.

RoHS Compliance: The IM04EB6R8K is ROHS3 compliant. The 1537-32K is RoHS non-compliant. The 1537R-32K, ER1537-32KM, ER1537-32KP, and ER1537-32KR are RoHS non-compliant. Applications requiring RoHS compliance should evaluate regulatory requirements independently.

Packaging Selection: Choose between Tape & Reel (TR) for automated assembly or Cut Tape (CT) based on production volume and assembly equipment compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use 1537R-32K or 1537-32K as direct replacements for IM04EB6R8K?

A: Yes. Both parts maintain identical inductance (6.8 µH), tolerance (±10%), DC resistance (500mOhm), core material (iron), shielding (unshielded), package (axial), dimensions (0.156" Dia x 0.375" L), and operating temperature range (-55°C ~ 105°C). The 450 mA current rating exceeds the original 395 mA specification, making these parts suitable for applications where the original current rating is adequate.

Q: What is the difference between 1537R-32K and 1537-32K?

A: Both parts are electrically identical. The primary difference is packaging: 1537R-32K is supplied in Tape & Reel (TR) format for automated assembly, while 1537-32K is supplied in Cut Tape (CT) format. Select based on your assembly process requirements.

Q: Should I use ER1537-32KM, ER1537-32KP, or ER1537-32KR?

A: All three ER1537 variants are electrically identical to the IM04EB6R8K, maintaining the original 395 mA current rating and all other electrical specifications. Selection between these three parts should be based on packaging availability, supplier inventory, and lead time requirements. All are supplied in Tape & Reel (TR) format.

Q: Are there any compliance differences I should consider?

A: The IM04EB6R8K is ROHS3 compliant. All substitute parts (1537R-32K, 1537-32K, ER1537-32KM, ER1537-32KP, ER1537-32KR) are RoHS non-compliant. Applications subject to RoHS regulations should evaluate compliance requirements independently before selection.

Q: Will these substitutes work in my existing PCB layout?

A: Yes. All substitute parts maintain identical physical dimensions (0.156" Dia x 0.375" L), axial package configuration, and through-hole mounting type. No PCB layout modifications are required.

Q: What is the inventory status for these parts?

A: IM04EB6R8K: 1123 Pcs. 1537R-32K: 1175 Pcs. 1537-32K: 689 Pcs. ER1537-32KM: 689 Pcs. ER1537-32KP: 949 Pcs. ER1537-32KR: 898 Pcs. All parts are available as new original stock.

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