ISC1210BN4R7J Equivalent & Substitute Parts

Part Overview

The ISC1210BN4R7J 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 operates across the temperature range of -55°C to 125°C and is classified as an active product. Substitute parts become necessary when the original component reaches end-of-life status, inventory constraints occur, or design requirements necessitate alternative electrical or mechanical characteristics within the allowable parameter tolerance.

Key Parameters

Parameter	Value
Inductance	4.7 µH
Tolerance	±5%
Current Rating	220 mA
DC Resistance (Max)	1.25Ohm
Shielding	Shielded
Core Material	Iron Powder
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 125°C
Q @ Frequency	30 @ 7.96MHz
Self Resonant Frequency	52MHz

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210BN4R7J is determined by the following critical parameters:

Inductance Value: Must be 4.7 µH with ±5% tolerance
Current Rating: Minimum 220 mA continuous current capability
Package / Case: 1210 (3225 Metric) surface mount form factor
DC Resistance: Maximum 1.25Ohm to maintain circuit performance
Operating Temperature Range: Must support -55°C to 125°C minimum
Mounting Type: Surface mount configuration

The identified substitute part NLV32T-4R7J-PF meets the core electrical and mechanical requirements for direct substitution, with documented variations in shielding type and core material that remain within acceptable design parameters.

Parameter Comparison

Parameter	ISC1210BN4R7J (Main)	NLV32T-4R7J-PF (Substitute)
Manufacturer	Vishay Dale	TDK Corporation
Inductance	4.7 µH	4.7 µH
Tolerance	±5%	±5%
Current Rating (Amps)	220 mA	220 mA
DC Resistance (Max)	1.25Ohm	1.5Ohm
Shielding	Shielded	Unshielded
Core Material	Iron Powder	Ferrite
Package / Case	1210 (3225 Metric)	1210 (3225 Metric)
Mounting Type	Surface Mount	Surface Mount
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C
Q @ Frequency	30 @ 7.96MHz	30 @ 7.96MHz
Self Resonant Frequency	52MHz	50MHz
Product Status	Active	Not For New Designs
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The NLV32T-4R7J-PF substitute maintains electrical equivalence in inductance value, current rating, and frequency characteristics. The primary design considerations are:

DC Resistance Variance: The substitute exhibits 1.5Ohm maximum DC resistance compared to 1.25Ohm for the main part. This 0.25Ohm increase results in proportionally higher resistive losses and must be evaluated against circuit power budget requirements.

Operating Temperature Range: The substitute operates within -40°C to 105°C, which is narrower than the main part's -55°C to 125°C range. Applications requiring full temperature extremes must retain the ISC1210BN4R7J.

Shielding Configuration: The main part provides shielded construction while the substitute is unshielded. Circuits sensitive to electromagnetic interference or requiring EMI containment should maintain the shielded variant.

Core Material and Compliance: The substitute utilizes ferrite core material with ROHS3 compliance, whereas the main part uses iron powder core with non-compliant status. New design initiatives may favor the substitute for regulatory alignment.

Product Status: The substitute is designated "Not For New Designs," indicating potential future discontinuation. Long-term availability should be verified for production commitments.

Frequently Asked Questions (FAQ)

Q: Can NLV32T-4R7J-PF be used as a direct drop-in replacement for ISC1210BN4R7J?

A: Mechanical compatibility is confirmed through identical 1210 (3225 Metric) package specifications and surface mount configuration. Electrical compatibility requires circuit-level validation due to differences in DC resistance (1.5Ohm vs. 1.25Ohm), operating temperature range (-40°C to 105°C vs. -55°C to 125°C), and shielding characteristics.

Q: What is the impact of the 0.25Ohm DC resistance increase?

A: The substitute's higher DC resistance increases resistive power dissipation proportionally to the square of the current. At 220 mA, this results in approximately 60.5 mW dissipation versus 60.5 mW for the main part. Circuit thermal management and performance specifications must accommodate this variance.

Q: Does the unshielded construction of the substitute affect EMI performance?

A: Unshielded inductors exhibit greater electromagnetic field radiation compared to shielded variants. Applications requiring EMI suppression, noise filtering, or operation in electromagnetically sensitive environments should retain the shielded ISC1210BN4R7J configuration.

Q: Are there temperature-related constraints for the substitute?

A: The NLV32T-4R7J-PF operates within -40°C to 105°C, which excludes the lower temperature extreme (-55°C) and upper temperature extreme (125°C) of the main part. Applications requiring full temperature range operation must use the ISC1210BN4R7J.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the substitute is in mature or declining production phase. While currently available, long-term supply continuity is not guaranteed. New product designs should evaluate long-term component availability and consider the active-status main part or alternative qualified sources.

Q: How do the core materials affect inductor performance?

A: Iron powder cores (main part) provide superior high-frequency stability and lower core losses at elevated frequencies. Ferrite cores (substitute) offer different saturation characteristics and temperature coefficients. Circuit performance at the 7.96 MHz test frequency and 52 MHz self-resonant frequency should be validated for the specific application.

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