ISC1210BN3R3K Equivalent & Substitute Parts

Part Overview

The ISC1210BN3R3K 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 operates at 270 mA maximum current with 1.1Ohm maximum DC resistance and is rated for -55°C to 125°C operating temperature. The part is currently active in production. Substitute parts may be required due to inventory availability, packaging format preferences, or compliance requirements specific to end-application specifications.

Substiute Parts

ISC1210BN3R3K

Vishay DaleIn Stock: 1073ISC1210BN3R3K Datasheet

Current PartRFQ

74476403

Würth ElektronikIn Stock: 330774476403 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISC1210BN3R3K is determined by the following critical parameters:

• Inductance value: 3.3 µH (exact match required)
• Tolerance: ±10% (exact match required)
• Package/Case: 1210 (3225 Metric) (exact match required)
• Current Rating: minimum 260 mA (ISC1210BN3R3K rated at 270 mA)
• DC Resistance: maximum 1.2Ohm (ISC1210BN3R3K rated at 1.1Ohm max)
• Mounting Type: Surface Mount (exact match required)
• Q @ Frequency: 30 @ 7.96MHz (exact match required)
• Self Resonant Frequency: 60MHz (exact match required)

The Würth Elektronik 74476403 qualifies as a substitute based on matching inductance, tolerance, package dimensions, frequency characteristics, and current/resistance parameters within acceptable engineering margins.

Parameter Comparison

Engineering Selection Recommendations

The 74476403 (Würth Elektronik) is an active substitute for the ISC1210BN3R3K based on electrical parameter compatibility. Key considerations for selection:

• The substitute maintains identical inductance (3.3 µH), tolerance (±10%), and frequency characteristics (Q @ 7.96MHz, 60MHz self-resonant frequency).
• Current rating differential: 74476403 rated at 260 mA versus ISC1210BN3R3K at 270 mA. Applications requiring the full 270 mA rating must verify the 260 mA rating is sufficient for the specific circuit.
• DC resistance: 74476403 at 1.2Ohm maximum versus ISC1210BN3R3K at 1.1Ohm maximum. The 0.1Ohm increase may impact thermal performance in high-current applications.
• Operating temperature range: ISC1210BN3R3K operates -55°C to 125°C; 74476403 operates -40°C to 105°C. Applications requiring extended low-temperature operation below -40°C or high-temperature operation above 105°C must use the original part.
• Shielding: ISC1210BN3R3K is shielded; 74476403 is unshielded. Applications sensitive to electromagnetic interference may require the shielded variant.
• Core material: ISC1210BN3R3K uses iron powder; 74476403 uses ferrite. Core material affects frequency response and saturation characteristics.
• Compliance: 74476403 is ROHS3 compliant and REACH unaffected, while ISC1210BN3R3K is RoHS non-compliant and REACH affected. Applications with regulatory compliance requirements should prioritize the substitute.
• Packaging: ISC1210BN3R3K supplied in Bulk; 74476403 supplied in Tape & Reel (TR). Packaging selection depends on assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can the 74476403 be used in place of the ISC1210BN3R3K in all applications?

A: The 74476403 is electrically compatible for applications where the 260 mA current rating, 1.2Ohm DC resistance, -40°C to 105°C operating temperature range, and unshielded configuration are acceptable. Applications requiring the full 270 mA rating, extended temperature range, or shielding must use the original ISC1210BN3R3K.

Q: What is the impact of different core materials (iron powder vs. ferrite)?

A: Core material affects inductor performance characteristics including frequency response, saturation behavior, and temperature stability. Iron powder cores (ISC1210BN3R3K) and ferrite cores (74476403) have different permeability and loss characteristics. Circuit performance validation is necessary when substituting between different core materials.

Q: Does the unshielded design of the 74476403 affect electromagnetic compatibility?

A: Unshielded inductors generate external magnetic fields that may couple with nearby components or circuits. Applications in noise-sensitive environments or with tight EMI requirements should verify that the unshielded 74476403 meets electromagnetic compatibility specifications. The shielded ISC1210BN3R3K may be required for such applications.

Q: Are the physical dimensions compatible for PCB layout?

A: Both parts use the 1210 (3225 Metric) package with nearly identical dimensions (3.20mm x 2.49-2.50mm length and width; 2.40-2.41mm height). PCB footprints designed for the ISC1210BN3R3K will accommodate the 74476403 without layout modification.

Q: What is the significance of the different packaging formats (Bulk vs. Tape & Reel)?

A: Bulk packaging is suitable for manual assembly or small-volume production. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly. Selection depends on manufacturing process requirements and assembly volume.

Q: How does the RoHS compliance difference affect part selection?

A: The 74476403 is ROHS3 compliant while the ISC1210BN3R3K is RoHS non-compliant. Applications subject to RoHS regulations or customer requirements for RoHS compliance must use the 74476403 or equivalent compliant substitute.