IMS05EB1R8K Equivalent & Substitute Parts

Part Overview

The IMS05EB1R8K is a 1.8 µH shielded molded inductor manufactured by Vishay Dale, rated for 775 mA with a maximum DC resistance of 140 mOhm. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain electrical performance across inductance, current rating, DC resistance, and frequency characteristics while accommodating variations in core material, shielding configuration, and compliance status.

Key Parameters

Parameter	Value
Inductance	1.8 µH
Tolerance	±10%
Current Rating	775 mA
DC Resistance (DCR)	140 mOhm Max
Q @ Frequency	44 @ 7.9 MHz
Frequency - Self Resonant	105 MHz
Operating Temperature Range	-55°C ~ 105°C
Shielding	Shielded
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)

Substitute Part Grouping Explanation

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

Inductance Value: 1.8 µH ±10%
Current Rating: Minimum 775 mA
DC Resistance: 140 mOhm Max
Q Factor: 44 @ 7.9 MHz
Self Resonant Frequency: 105 MHz
Mounting Configuration: Through Hole Axial
Physical Dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)

Substitute parts are grouped based on core material composition (Iron Powder, Ferrite, Iron) and shielding configuration (Shielded, Unshielded). While core material and shielding may differ, all listed substitutes maintain the electrical performance specifications required for functional equivalence.

Parameter Comparison

Parameter	IMS05EB1R8K (Vishay Dale)	9250A-182-RC (Bourns Inc.)	ER1641-182KM (API Delevan)	ER1641-182KP (API Delevan)	ER1641-182KR (API Delevan)
Inductance	1.8 µH	1.8 µH	1.8 µH	1.8 µH	1.8 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	775 mA	775 mA	755 mA	755 mA	755 mA
DC Resistance (DCR)	140 mOhm Max	140 mOhm Max	140 mOhm Max	140 mOhm Max	140 mOhm Max
Q @ Frequency	44 @ 7.9 MHz	44 @ 7.9 MHz	44 @ 7.9 MHz	44 @ 7.9 MHz	44 @ 7.9 MHz
Frequency - Self Resonant	105 MHz	105 MHz	105 MHz	105 MHz	105 MHz
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Shielding	Shielded	Shielded	Shielded	Shielded	Unshielded
Core Material	Iron Powder	Ferrite	Iron	Iron	Iron
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial
Size / Dimension	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L	0.162" Dia x 0.410" L
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant

Engineering Selection Recommendations

9250A-182-RC (Bourns Inc.) is the primary recommended substitute. This part maintains active product status, achieves ROHS3 compliance matching the original specification, and extends the operating temperature range to -55°C ~ 125°C. The ferrite core material and shielded configuration provide electrical equivalence across all critical parameters. Packaging in bulk format supports production requirements.

ER1641-182KM and ER1641-182KP (API Delevan Inc.) are functionally equivalent alternatives with active product status. Both employ iron core construction and maintain shielded configuration. Current rating is specified at 755 mA, which is 20 mA below the original 775 mA rating. RoHS non-compliance status requires evaluation against design requirements. Tape & Reel packaging accommodates automated assembly processes.

ER1641-182KR (API Delevan Inc.) provides an unshielded alternative with military qualification per MIL-PRF-39010/02. This configuration is suitable only for applications where shielding is not a functional requirement. Current rating of 755 mA and RoHS non-compliance status apply. Unshielded construction may introduce electromagnetic coupling considerations in sensitive circuit environments.

Frequently Asked Questions (FAQ)

Q: Can ER1641-182KR be used as a direct replacement for IMS05EB1R8K?

A: ER1641-182KR maintains electrical performance specifications but differs in shielding configuration. The original part is shielded; ER1641-182KR is unshielded. Substitution is valid only if circuit design does not depend on shielding for electromagnetic isolation or noise suppression.

Q: What is the significance of the 20 mA current rating difference in ER1641 parts?

A: ER1641-182KM and ER1641-182KP are rated at 755 mA versus the original 775 mA. This 2.6% reduction in current capacity must be evaluated against actual circuit current requirements. If circuit operation remains within 755 mA, functional equivalence is maintained.

Q: Why does 9250A-182-RC have an extended operating temperature range?

A: The 9250A-182-RC extends to -55°C ~ 125°C compared to the original -55°C ~ 105°C. This extended range provides additional thermal margin and does not compromise compatibility with designs specified for the original temperature range.

Q: Are there compliance considerations when selecting substitutes?

A: Yes. The original IMS05EB1R8K is ROHS3 compliant. The 9250A-182-RC maintains this compliance. ER1641 series parts are RoHS non-compliant and require design review if RoHS compliance is a system requirement.

Q: What packaging formats are available?

A: 9250A-182-RC is supplied in bulk packaging. ER1641-182KM, ER1641-182KP, and ER1641-182KR are supplied in Tape & Reel format. Packaging selection depends on production volume and assembly automation requirements.

Q: Do all substitutes maintain the same physical dimensions?

A: Yes. All substitute parts maintain the 0.162" Dia x 0.410" L (4.11mm x 10.41mm) axial configuration, ensuring mechanical compatibility with existing PCB layouts and through-hole mounting patterns.

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