IMS05EB8R2K Equivalent & Substitute Parts

Part Overview

The IMS05EB8R2K is an 8.2 µH shielded molded inductor manufactured by Vishay Dale, rated for 250 mA with a maximum DC resistance of 1.32Ohm. This through-hole axial component operates across -55°C to 105°C and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

IMS05EB8R2K

Vishay DaleIn Stock: 1090IMS05EB8R2K Datasheet

Current PartRFQ

9250A-822-RC

Bourns Inc.In Stock: 7419250A-822-RC Datasheet

MFR RecommendedRFQ

ER1641-822KM

API Delevan Inc.In Stock: 791ER1641-822KM Datasheet

MFR RecommendedRFQ

ER1641-822KP

API Delevan Inc.In Stock: 797ER1641-822KP Datasheet

MFR RecommendedRFQ

ER1641-822KR

API Delevan Inc.In Stock: 873ER1641-822KR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IMS05EB8R2K is determined by the following critical parameters:

• Inductance Value: 8.2 µH (exact match required)
• Tolerance: ±10% (exact match required)
• Current Rating: Minimum 245 mA (IMS05EB8R2K rated at 250 mA)
• DC Resistance: 1.32Ohm Max (exact match required)
• Shielding: Shielded (required for EMI performance)
• Mounting Type: Through Hole Axial (physical compatibility)
• Package Dimensions: 0.162" Dia x 0.410" L (4.11mm x 10.41mm) (PCB footprint compatibility)
• Q Factor: 50 @ 7.9MHz (frequency response characteristic)
• Self Resonant Frequency: 50MHz (upper frequency limit)

All four substitute parts meet these core electrical and mechanical requirements. Differences in core material (ferrite vs. iron), operating temperature range, and RoHS compliance status are secondary considerations that do not affect functional substitution within the specified parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 9250A-822-RC (Bourns Inc.)

The 9250A-822-RC is the preferred substitute. It maintains full electrical equivalence with the IMS05EB8R2K across all critical parameters: 8.2 µH inductance, ±10% tolerance, 250 mA current rating, and 1.32Ohm maximum DC resistance. The Bourns part offers an extended operating temperature range (-55°C to 125°C) and is ROHS3 compliant, matching the original part's regulatory status. Active product status ensures long-term availability and supply chain continuity.

Secondary Recommendations: ER1641-822KM, ER1641-822KP, ER1641-822KR (API Delevan Inc.)

The three API Delevan ER1641 variants are functionally equivalent with one electrical difference: current rating of 245 mA versus the original 250 mA. This 2% reduction in current capacity is acceptable for applications operating below 245 mA. All three variants maintain identical inductance, tolerance, DC resistance, and frequency characteristics. These parts are active products with confirmed inventory availability. However, they are RoHS non-compliant, which may restrict use in applications requiring regulatory compliance. The three variants differ only in packaging configuration (Tape & Reel) and are electrically interchangeable.

Compliance Consideration:

For applications requiring ROHS3 compliance, the 9250A-822-RC is the only substitute that maintains both electrical equivalence and regulatory alignment with the original IMS05EB8R2K.

Frequently Asked Questions (FAQ)

Q: Can the 9250A-822-RC directly replace the IMS05EB8R2K without circuit modifications?

A: Yes. The 9250A-822-RC is electrically and mechanically equivalent across all specified parameters: inductance, tolerance, current rating, DC resistance, frequency response, and physical dimensions. No circuit modifications are required.

Q: Why do the API Delevan ER1641 parts have a lower current rating (245 mA vs. 250 mA)?

A: The ER1641 series is rated at 245 mA, which is 5 mA below the original specification. This difference does not affect substitution eligibility for applications operating at or below 245 mA. For circuits requiring the full 250 mA capacity, the 9250A-822-RC is the appropriate choice.

Q: Are the three API Delevan variants (ER1641-822KM, ER1641-822KP, ER1641-822KR) electrically identical?

A: Yes. The three variants are electrically identical. The designations reflect different packaging configurations (Tape & Reel variants). Selection between them depends on procurement and assembly requirements, not electrical performance.

Q: What is the impact of the extended temperature range in the 9250A-822-RC (-55°C to 125°C vs. -55°C to 105°C)?

A: The extended upper temperature limit of 125°C in the Bourns part provides additional thermal margin. For applications operating within the original -55°C to 105°C range, both parts perform identically. The extended range offers design flexibility for future applications without component change.

Q: Does core material (ferrite vs. iron) affect substitution compatibility?

A: No. The ferrite core in the 9250A-822-RC and iron cores in the ER1641 series produce identical electrical characteristics at the specified frequency (7.9 MHz test frequency, 50 MHz self-resonant frequency). Core material is an internal design choice that does not affect functional substitution when electrical parameters match.

Q: Are RoHS non-compliant parts acceptable substitutes?

A: RoHS compliance is a regulatory requirement, not an electrical parameter. For applications or markets requiring ROHS3 compliance, only the 9250A-822-RC qualifies. For applications without RoHS requirements, the API Delevan ER1641 variants are functionally equivalent substitutes.

Q: What is the physical footprint compatibility?

A: All substitute parts share identical axial through-hole dimensions (0.162" Dia x 0.410" L / 4.11mm x 10.41mm). PCB layouts require no modification for any substitute part.