IMS05EB1R2K Equivalent & Substitute Parts

Part Overview

The IMS05EB1R2K is a 1.2 µH shielded molded inductor manufactured by Vishay Dale, rated for 895 mA with a maximum DC resistance of 100 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 105°C and is ROHS3 compliant.

Key Parameters

Parameter	Value
Inductance	1.2 µH
Inductance Tolerance	±10%
Current Rating	895 mA
DC Resistance (DCR)	100 mOhm Max
Shielding	Shielded
Type	Molded
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Q @ Frequency	44 @ 7.9 MHz
Frequency - Self Resonant	130 MHz
Operating Temperature	-55°C ~ 105°C

Substitute Part Grouping Explanation

Substitution eligibility for the IMS05EB1R2K is determined by the following critical parameters:

Inductance value: 1.2 µH with ±10% tolerance
Current rating: 895 mA minimum
DC resistance: 100 mOhm maximum
Shielding: Shielded configuration required
Mounting type: Through hole axial package
Physical dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Q factor and self-resonant frequency: 44 @ 7.9 MHz and 130 MHz respectively

All substitute parts listed meet these electrical and mechanical specifications. Variations in core material (ferrite vs. iron powder vs. iron) and product status (active vs. obsolete) do not affect functional equivalence within the specified parameter range.

Parameter Comparison

Parameter	IMS05EB1R2K (Vishay Dale)	9250A-122-RC (Bourns Inc.)	ER1641-122KM (API Delevan Inc.)	ER1641-122KP (API Delevan Inc.)	ER1641-122KR (API Delevan Inc.)
Inductance	1.2 µH	1.2 µH	1.2 µH	1.2 µH	1.2 µH
Inductance Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	895 mA	895 mA	895 mA	895 mA	895 mA
DC Resistance (DCR)	100 mOhm Max	100 mOhm Max	100 mOhm Max	100 mOhm Max	100 mOhm Max
Shielding	Shielded	Shielded	Shielded	Shielded	Shielded
Type	Molded	Molded	Molded	Molded	Molded
Material - Core	Iron Powder	Ferrite	Iron	Iron	Iron
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	130 MHz	130 MHz	130 MHz	130 MHz	130 MHz
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
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 (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)	0.162" Dia x 0.410" L (4.11mm x 10.41mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

The 9250A-122-RC from Bourns Inc. is the primary recommended substitute. This part is active in production, ROHS3 compliant, and offers an extended operating temperature range of -55°C to 125°C compared to the original specification of -55°C to 105°C. All electrical parameters match the IMS05EB1R2K exactly.

The ER1641 series parts (ER1641-122KM, ER1641-122KP, ER1641-122KR) from API Delevan Inc. are functionally equivalent alternatives. These parts are active in production and meet all electrical specifications. However, they are RoHS non-compliant, which may restrict their use in applications requiring regulatory compliance. The three variants differ only in packaging configuration (Tape & Reel).

For applications requiring ROHS3 compliance and active product status, the 9250A-122-RC is the optimal selection. For applications without RoHS requirements, the ER1641 series provides additional inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-122-RC directly replace the IMS05EB1R2K?

A: Yes. The 9250A-122-RC meets all critical electrical parameters: 1.2 µH inductance, 895 mA current rating, 100 mOhm maximum DC resistance, and identical physical dimensions. The extended temperature range provides additional operational margin.

Q: What is the difference between the ER1641-122KM, ER1641-122KP, and ER1641-122KR variants?

A: These three parts are electrically identical. The suffix designates packaging configuration: KM, KP, and KR represent different tape and reel specifications. Selection depends on procurement and assembly requirements.

Q: Are there compliance differences between substitute options?

A: Yes. The 9250A-122-RC is ROHS3 compliant. The ER1641 series parts are RoHS non-compliant. Applications subject to RoHS regulations must use the 9250A-122-RC.

Q: Does core material affect substitution eligibility?

A: No. The IMS05EB1R2K uses iron powder core, the 9250A-122-RC uses ferrite core, and the ER1641 series uses iron core. All deliver identical electrical performance within the specified parameter tolerances.

Q: What is the inventory status for each substitute?

A: 9250A-122-RC: 2924 pcs; ER1641-122KM: 986 pcs; ER1641-122KP: 637 pcs; ER1641-122KR: 1174 pcs. All substitutes are available in production quantities.

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