ISC1210ER4R7K Equivalent & Substitute Parts

Part Overview

The ISC1210ER4R7K is a 4.7 µH shielded drum core wirewound inductor manufactured by Vishay Dale, rated for 220 mA continuous current with a maximum DC resistance of 1.25Ohm. This surface mount component in 1210 (3225 Metric) package is designed for applications requiring controlled electromagnetic shielding and stable inductance performance across the operating temperature range of -55°C to 125°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when addressing supply chain constraints, lead time requirements, or specific application needs such as alternative core materials or packaging formats while maintaining equivalent electrical performance.

Substiute Parts

ISC1210ER4R7K

Vishay DaleIn Stock: 1073ISC1210ER4R7K Datasheet

Current PartRFQ

CMH322522-4R7KL

Bourns Inc.In Stock: 2657CMH322522-4R7KL Datasheet

DirectRFQ

74476404

Würth ElektronikIn Stock: 401474476404 Datasheet

MFR RecommendedRFQ

B82422T1472K000

EPCOS - TDK ElectronicsIn Stock: 25485B82422T1472K000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210ER4R7K is determined by the following critical parameters:

• Inductance value: 4.7 µH (exact match required)
• Inductance tolerance: ±10% (exact match required)
• Current rating: 220 mA minimum (equal or higher acceptable)
• Package / Case: 1210 (3225 Metric) form factor (exact match required)
• Operating temperature range: -55°C ~ 125°C minimum coverage (equal or wider range acceptable)
• Mounting type: Surface Mount (exact match required)
• RoHS3 compliance: Required for regulatory equivalence

The three substitute parts listed below meet these core electrical and mechanical criteria. Variations in DC resistance, core material, and shielding characteristics are noted as secondary parameters that may influence selection based on specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

CMH322522-4R7KL (Bourns Inc.) maintains full electrical and thermal equivalence to the ISC1210ER4R7K with identical operating temperature range (-55°C ~ 125°C) and packaging format (Tape & Reel). The primary difference is increased DC resistance (1.5Ohm vs. 1.25Ohm) due to ferrite core material substitution for iron powder. This part is suitable for applications where shielding is required and thermal performance across the full temperature range is critical. RoHS3 compliance and MSL 1 rating are maintained.

74476404 (Würth Elektronik) provides electrical equivalence with ferrite core construction but operates within a reduced temperature range (-40°C ~ 105°C), making it unsuitable for applications requiring full -55°C operation. The unshielded design eliminates electromagnetic containment, which may introduce coupling effects in sensitive circuits. This part is appropriate only for applications operating within the narrower temperature window and where shielding is not a functional requirement.

B82422T1472K000 (EPCOS - TDK Electronics) offers the widest operating temperature coverage (-55°C ~ 125°C) matching the original part, with ferrite core construction and unshielded design. The packaging format differs (Cut Tape vs. Tape & Reel), which may impact automated assembly workflows. This part includes AEC-Q200 automotive qualification, providing additional reliability assurance for demanding applications. The reduced height (2.10mm vs. 2.41mm) may offer space advantages in constrained layouts.

Frequently Asked Questions (FAQ)

Q: Can CMH322522-4R7KL replace ISC1210ER4R7K in all applications?

A: CMH322522-4R7KL is electrically equivalent for inductance, current rating, and frequency response. The increased DC resistance (1.5Ohm vs. 1.25Ohm) results in approximately 20% higher resistive losses. Applications sensitive to power dissipation or thermal performance should evaluate this difference. Both parts maintain identical operating temperature range and shielding characteristics.

Q: Why does 74476404 have a narrower operating temperature range?

A: The 74476404 operates from -40°C ~ 105°C, which does not cover the full -55°C lower limit of the original ISC1210ER4R7K. This part is unsuitable for applications requiring operation at temperatures below -40°C. Additionally, the unshielded design may not be acceptable for circuits requiring electromagnetic isolation.

Q: What is the impact of switching from shielded to unshielded inductors?

A: Shielded inductors (ISC1210ER4R7K and CMH322522-4R7KL) contain magnetic fields within the component, reducing coupling to adjacent circuit elements. Unshielded inductors (74476404 and B82422T1472K000) allow magnetic field radiation, which may cause interference in sensitive analog or RF circuits. Selection depends on circuit layout and electromagnetic compatibility requirements.

Q: Does packaging format (Tape & Reel vs. Cut Tape) affect electrical performance?

A: Packaging format does not affect electrical performance. Tape & Reel (TR) packaging is optimized for high-volume automated assembly, while Cut Tape (CT) is suitable for lower-volume or manual assembly processes. B82422T1472K000 uses Cut Tape format, which may require different handling procedures.

Q: Is B82422T1472K000 suitable for automotive applications?

A: B82422T1472K000 carries AEC-Q200 automotive qualification, indicating compliance with automotive reliability and environmental stress testing standards. This certification is not present on the other substitute parts. Selection for automotive applications should prioritize this part if qualification requirements apply.

Q: What is the significance of the self-resonant frequency differences?

A: Self-resonant frequency (SRF) indicates the frequency at which the inductor transitions from inductive to capacitive behavior. ISC1210ER4R7K has SRF of 52MHz, while substitute parts range from 45MHz to 50MHz. For applications operating near or above these frequencies, the specific SRF value becomes critical to circuit performance and should be verified against design requirements.