ISC1210SY4R7J Equivalent & Substitute Parts

Part Overview

The ISC1210SY4R7J 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 1.25 Ohm. This surface mount component is housed in a 1210 (3225 Metric) package and operates across the temperature range of -55°C to 125°C. The part is currently active in production. Substitute parts are necessary when the original manufacturer part becomes unavailable, when design requirements shift toward RoHS compliance, or when alternative packaging formats better suit supply chain logistics.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210SY4R7J is determined by the following critical parameters:

Inductance Value: Must be 4.7 µH with ±5% tolerance
Current Rating: Must support minimum 220 mA continuous current
Package / Case: Must be 1210 (3225 Metric) surface mount
Mounting Type: Must be surface mount compatible
DC Resistance: Must not exceed 1.25 Ohm maximum
Core Type: Drum core wirewound construction
Operating Temperature Range: Must cover or exceed the application's required temperature window

The identified substitute NLV32T-4R7J-PF from TDK Corporation meets the core electrical and mechanical requirements. However, differences exist in shielding configuration, core material composition, and operating temperature range that must be evaluated against specific application constraints.

Parameter Comparison

Parameter	ISC1210SY4R7J (Vishay Dale)	NLV32T-4R7J-PF (TDK Corporation)
Inductance	4.7 µH	4.7 µH
Tolerance	±5%	±5%
Current Rating (Amps)	220 mA	220 mA
DC Resistance (Max)	1.25 Ohm	1.5 Ohm
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 @ 7.96 MHz	30 @ 7.96 MHz
Self Resonant Frequency	52 MHz	50 MHz
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Product Status	Active	Not For New Designs
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

The NLV32T-4R7J-PF presents a functional equivalent for applications where the following conditions are met:

Electrical Compatibility: Both parts maintain identical inductance values, tolerance specifications, and current ratings. The DC resistance differential of 0.25 Ohm (1.5 Ohm vs. 1.25 Ohm maximum) must be evaluated against circuit power dissipation budgets and thermal management requirements.

Shielding Consideration: The ISC1210SY4R7J features shielding while the NLV32T-4R7J-PF is unshielded. Applications requiring electromagnetic interference suppression or operating in electromagnetically noisy environments must account for this difference.

Temperature Range: The ISC1210SY4R7J operates to -55°C, while the NLV32T-4R7J-PF operates to -40°C minimum. Applications requiring operation below -40°C cannot use the TDK substitute.

Compliance Status: The NLV32T-4R7J-PF is ROHS3 compliant, whereas the ISC1210SY4R7J is RoHS non-compliant. The NLV32T-4R7J-PF is designated "Not For New Designs," indicating limited long-term availability for new product development.

Core Material: The ISC1210SY4R7J uses iron powder core material while the NLV32T-4R7J-PF uses ferrite. This difference affects frequency response characteristics and electromagnetic behavior in specific circuit topologies.

Frequently Asked Questions (FAQ)

Q: Can the NLV32T-4R7J-PF directly replace the ISC1210SY4R7J in all applications?

A: Direct replacement is possible only when the application does not require shielding, operates within the -40°C to 105°C temperature window, and can tolerate the 0.25 Ohm increase in DC resistance. Core material differences may affect performance in frequency-sensitive circuits.

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

A: At 220 mA rated current, the additional 0.25 Ohm resistance increases power dissipation by approximately 12.1 mW. Circuit thermal analysis must confirm this additional dissipation does not exceed component or board thermal limits.

Q: Why is the NLV32T-4R7J-PF marked "Not For New Designs"?

A: This designation indicates the part is in mature or declining production status. While existing inventory may be available, long-term supply cannot be guaranteed for new product development programs.

Q: Are the package dimensions identical between these parts?

A: Both parts use the 1210 (3225 Metric) package. Seated heights differ slightly: ISC1210SY4R7J at 0.095" (2.41 mm) maximum versus NLV32T-4R7J-PF at 0.094" (2.40 mm) maximum. This 0.01 mm difference is negligible for standard PCB assembly processes.

Q: What packaging formats are available?

A: The ISC1210SY4R7J is supplied in Tape & Reel (TR) format. The NLV32T-4R7J-PF is available in Cut Tape (CT) and Digi-Reel® formats, which may affect procurement and assembly logistics.

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