IMS05EB4R7K Equivalent & Substitute Parts

Part Overview

The IMS05EB4R7K is a 4.7 µH shielded molded inductor manufactured by Vishay Dale, rated for 380 mA with a maximum DC resistance of 550 mOhm. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 105°C and meets ROHS3 compliance requirements.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±10%
Current Rating	380 mA
DC Resistance (DCR)	550 mOhm Max
Shielding	Shielded
Core Material	Iron Powder
Mounting Type	Through Hole
Package Type	Axial
Operating Temperature Range	-55°C ~ 105°C
Q @ Frequency	44 @ 7.9 MHz
Self Resonant Frequency	70 MHz
Physical Dimensions	0.162" Dia x 0.410" L (4.11mm x 10.41mm)

Substitute Part Grouping Explanation

Substitute parts for the IMS05EB4R7K are qualified based on the following electrical and mechanical parameters:

Inductance value: 4.7 µH with ±10% tolerance
Current rating: 380 mA minimum
DC resistance: 550 mOhm maximum
Shielding configuration: Shielded
Mounting type: Through Hole Axial
Physical dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm)
Operating temperature range: -55°C to 105°C minimum
Q factor and self-resonant frequency characteristics

Substitutes are grouped by product status (Active vs. Obsolete), packaging format, and core material composition. All qualified substitutes maintain electrical equivalence within the specified parameter tolerances.

Parameter Comparison

Part Number	Manufacturer	Inductance	Current Rating (mA)	DCR (mOhm)	Shielding	Core Material	Temp Range	Product Status	Packaging	RoHS Status
IMS05EB4R7K	Vishay Dale	4.7 µH	380	550 Max	Shielded	Iron Powder	-55°C ~ 105°C	Obsolete	Bulk	ROHS3
1641R-472K	API Delevan Inc.	4.7 µH	390	550 Max	Shielded	Iron	-55°C ~ 105°C	Active	Bulk	ROHS3
9250A-472-RC	Bourns Inc.	4.7 µH	380	550 Max	Shielded	Ferrite	-55°C ~ 125°C	Active	Bulk	ROHS3
ER1641-472KM	API Delevan Inc.	4.7 µH	380	550 Max	Shielded	Iron	-55°C ~ 105°C	Active	Tape & Reel	RoHS non-compliant
ER1641-472KP	API Delevan Inc.	4.7 µH	380	550 Max	Shielded	Iron	-55°C ~ 105°C	Active	Tape & Reel	RoHS non-compliant
ER1641-472KR	API Delevan Inc.	4.7 µH	380	550 Max	Unshielded	Iron	-55°C ~ 105°C	Active	Cut Tape	RoHS non-compliant

Engineering Selection Recommendations

Primary Recommendation: 9250A-472-RC (Bourns Inc.)

The 9250A-472-RC is the preferred substitute. It maintains full electrical equivalence with the IMS05EB4R7K, meets ROHS3 compliance, and operates across an extended temperature range (-55°C to 125°C). Product status is Active, ensuring long-term availability and supply chain stability.

Secondary Recommendation: 1641R-472K (API Delevan Inc.)

The 1641R-472K is an active product with ROHS3 compliance and bulk packaging. Current rating is 390 mA, which exceeds the original specification of 380 mA. This part is suitable for applications where higher current margin is acceptable.

Alternative Options: ER1641-472KM and ER1641-472KP (API Delevan Inc.)

Both ER1641 series parts are electrically equivalent and available in Tape & Reel packaging. However, these parts are RoHS non-compliant. Selection is appropriate only for applications where RoHS compliance is not required or where legacy component specifications mandate non-compliant materials.

Not Recommended: ER1641-472KR (API Delevan Inc.)

The ER1641-472KR is an unshielded variant. Substitution is not appropriate for applications requiring shielded inductors, as electromagnetic interference characteristics differ significantly from the original shielded design.

Frequently Asked Questions (FAQ)

Q: Can I use the 1641R-472K as a direct replacement for the IMS05EB4R7K?

A: Yes. The 1641R-472K meets all electrical specifications and maintains the same physical form factor. The 390 mA current rating provides additional margin above the original 380 mA specification. Both parts are ROHS3 compliant and operate across the required temperature range.

Q: What is the difference between the ER1641-472KM and ER1641-472KP?

A: Both parts are electrically identical 4.7 µH shielded inductors with 380 mA current rating. The difference is packaging format: ER1641-472KM is supplied in Tape & Reel format, while ER1641-472KP is also Tape & Reel. Both are RoHS non-compliant.

Q: Why is the ER1641-472KR not recommended?

A: The ER1641-472KR is an unshielded inductor, whereas the original IMS05EB4R7K is shielded. Unshielded inductors exhibit different electromagnetic field characteristics and may introduce unacceptable noise coupling in sensitive circuits. Use only if circuit design explicitly permits unshielded operation.

Q: Does the 9250A-472-RC have a different core material?

A: Yes. The 9250A-472-RC uses ferrite core material, while the original IMS05EB4R7K uses iron powder core. Both materials achieve the specified 4.7 µH inductance and 550 mOhm DCR. Ferrite cores typically exhibit different frequency response characteristics; verify suitability for your specific application frequency range.

Q: Are there packaging considerations when selecting a substitute?

A: Yes. The original IMS05EB4R7K is supplied in bulk packaging. Substitutes are available in Bulk (1641R-472K, 9250A-472-RC), Tape & Reel (ER1641-472KM, ER1641-472KP), and Cut Tape (ER1641-472KR) formats. Select packaging based on production volume and assembly equipment compatibility.

Q: What is the impact of RoHS compliance status?

A: The original part and recommended substitutes (1641R-472K, 9250A-472-RC) are ROHS3 compliant. The ER1641 series parts are RoHS non-compliant. Compliance status affects regulatory acceptance, supply chain restrictions, and long-term availability. Use non-compliant parts only when explicitly required by design specifications or legacy system requirements.

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