ISC1210SY3R3K Equivalent & Substitute Parts

Part Overview

The ISC1210SY3R3K is a 3.3 µH shielded drum core wirewound inductor manufactured by Vishay Dale, designed for surface mount applications in the 1210 (3225 Metric) package. This component is rated for 270 mA maximum current with 1.1Ohm maximum DC resistance and operates across the temperature range of -55°C to 125°C. The part maintains active product status and is currently in stock with 1173 pieces available. Substitute parts are identified when equivalent inductance values, current ratings, package dimensions, and frequency characteristics align within acceptable engineering tolerances, enabling component interchangeability in circuit designs where the primary part becomes unavailable.

Substiute Parts

ISC1210SY3R3K

Vishay DaleIn Stock: 1265ISC1210SY3R3K Datasheet

Current PartRFQ

74476403

Würth ElektronikIn Stock: 330774476403 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210SY3R3K is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 3.3 µH inductance with ±10% tolerance to ensure circuit performance consistency.

Current Rating: The substitute must support a minimum of 260 mA to accommodate the original design's 270 mA requirement within acceptable margin.

Package Dimensions: Both parts must conform to the 1210 (3225 Metric) surface mount package with compatible length (0.126"), width (0.098"), and height specifications to ensure PCB footprint compatibility.

DC Resistance: The substitute's maximum DC resistance of 1.2Ohm remains within acceptable limits for power dissipation and circuit operation.

Frequency Characteristics: Matching Q factor (30 @ 7.96MHz) and self-resonant frequency (60MHz) ensure equivalent high-frequency performance.

Core Type and Material: Both parts employ drum core wirewound construction, though the substitute uses ferrite core material versus iron powder in the original.

Mounting and Electrical Test Frequency: Both parts are surface mount components tested at 7.96 MHz.

The Würth Elektronik 74476403 meets these substitution criteria with equivalent electrical performance across the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The ISC1210SY3R3K and 74476403 are electrically equivalent for inductance, current handling, and frequency response. Selection between these parts should be based on the following compliance and certification factors:

RoHS Compliance: The Würth Elektronik 74476403 is ROHS3 compliant, whereas the Vishay Dale ISC1210SY3R3K is RoHS non-compliant. Applications requiring RoHS compliance must use the 74476403.

REACH Status: The ISC1210SY3R3K is REACH Affected, while the 74476403 is REACH Unaffected. Designs subject to REACH regulations should prioritize the 74476403.

Operating Temperature Range: The ISC1210SY3R3K operates from -55°C to 125°C, providing a wider temperature envelope than the 74476403 (-40°C to 105°C). Applications requiring extended low-temperature operation below -40°C must use the ISC1210SY3R3K.

Moisture Sensitivity: The ISC1210SY3R3K has MSL 1 (unlimited moisture exposure tolerance), while the 74476403 has MSL 3 (168-hour limit). High-humidity manufacturing environments may favor the ISC1210SY3R3K.

Shielding Characteristics: The ISC1210SY3R3K is shielded, while the 74476403 is unshielded. Applications sensitive to electromagnetic interference should use the shielded ISC1210SY3R3K.

Product Status: Both parts maintain active product status with current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 74476403 directly replace the ISC1210SY3R3K in all applications?

A: The 74476403 provides electrical equivalence in inductance, current rating, and frequency response. However, applications requiring extended temperature operation below -40°C, RoHS non-compliance, or shielded performance must retain the ISC1210SY3R3K. Applications requiring RoHS or REACH compliance must use the 74476403.

Q: What is the difference between shielded and unshielded inductors?

A: The ISC1210SY3R3K is shielded, containing electromagnetic field confinement to reduce interference with adjacent circuit components. The 74476403 is unshielded, allowing magnetic field radiation. Shielded inductors are preferred in noise-sensitive applications but typically exhibit higher DC resistance and cost.

Q: Are the package dimensions identical between these parts?

A: Both parts conform to the 1210 (3225 Metric) surface mount package with compatible PCB footprints. Dimensional variations are negligible: length and width are identical (0.126" x 0.098"), and height differences are minimal (0.095" versus 0.094"), ensuring interchangeable board-level placement.

Q: What does the ±10% tolerance mean for inductance?

A: The ±10% tolerance indicates that the actual inductance value will fall within the range of 2.97 µH to 3.63 µH. Both the ISC1210SY3R3K and 74476403 share this tolerance specification, ensuring consistent circuit performance across production batches.

Q: Why does the 74476403 have a lower current rating (260 mA vs. 270 mA)?

A: The 10 mA difference reflects different core material properties and thermal design between iron powder (ISC1210SY3R3K) and ferrite (74476403) cores. For applications operating at or near 270 mA, the ISC1210SY3R3K provides additional current margin. The 74476403 remains suitable for designs operating below 260 mA.

Q: What is MSL (Moisture Sensitivity Level) and why does it matter?

A: MSL indicates the component's sensitivity to moisture absorption during storage and handling. MSL 1 (ISC1210SY3R3K) allows unlimited exposure without baking requirements. MSL 3 (74476403) requires baking if exposed to moisture for more than 168 hours before soldering. High-volume manufacturing environments with extended component storage should consider MSL ratings.

Q: Can I use the 74476403 in applications requiring temperatures below -40°C?

A: No. The 74476403 is rated only to -40°C minimum, while the ISC1210SY3R3K operates to -55°C. Applications requiring operation below -40°C must use the ISC1210SY3R3K.