SCRH4D14R-8R2 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-8R2 is an 8.2 µH shielded inductor manufactured by Signal Transformer, rated for 890 mA continuous current with a maximum DC resistance of 210 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH4D14R-8R2

Signal TransformerIn Stock: 1263SCRH4D14R-8R2 Datasheet

Current PartRFQ

74437321082

Würth ElektronikIn Stock: 765574437321082 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH4D14R-8R2 is determined by the following critical parameters:

• Inductance Value: Must be 8.2 µH at 100 kHz test frequency
• Current Rating: Substitute must support minimum 890 mA continuous operation
• DC Resistance: Lower DCR values are acceptable; higher values may impact circuit performance
• Shielding: Shielded construction required to maintain electromagnetic isolation
• Surface Mount Configuration: Substitute must be compatible with surface mount assembly processes
• Physical Dimensions: Footprint compatibility with 4.10mm x 4.10mm mounting area
• Temperature Range: Must support -40°C to 125°C operating window
• Compliance: ROHS3 compliance required for regulatory alignment

The Würth Elektronik 74437321082 meets all substitution criteria with equivalent inductance, superior current handling capability, lower DC resistance, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The 74437321082 from Würth Elektronik is the qualified substitute for the obsolete SCRH4D14R-8R2. Selection is based on the following engineering factors:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, meeting current environmental standards
• Electrical Equivalence: Identical inductance value at the specified test frequency with tighter tolerance (±20% vs ±30%)
• Current Capability: The substitute provides 1.3 A rating, exceeding the original 890 mA requirement with additional design margin
• Thermal Performance: Operating temperature range matches the original specification across -40°C to 125°C
• Moisture Sensitivity: Both components carry MSL 1 rating, indicating unlimited shelf life under standard storage conditions
• Physical Compatibility: Footprint dimensions are nearly identical (4.06mm vs 4.10mm), with reduced height (1.20mm vs 1.50mm) providing layout flexibility

Frequently Asked Questions (FAQ)

Q: Can the 74437321082 be used as a direct replacement for the SCRH4D14R-8R2?

A: Yes. Both components share identical inductance values at 100 kHz, equivalent operating temperature ranges, and matching shielding characteristics. The substitute meets or exceeds all critical electrical parameters required for substitution.

Q: What is the impact of the higher DC resistance in the substitute part?

A: The 74437321082 has a maximum DCR of 376 mOhm compared to 210 mOhm in the original. This difference results in increased resistive losses. Circuit designers must verify that the additional power dissipation does not exceed thermal or efficiency requirements for their specific application.

Q: Are there package compatibility concerns?

A: The original SCRH4D14R-8R2 uses a nonstandard package, while the substitute uses a standardized 2-SMD package. Physical dimensions are nearly identical (4.06mm x 4.06mm vs 4.10mm x 4.10mm), and the substitute is slightly lower in height (1.20mm vs 1.50mm). PCB footprint verification is recommended before implementation.

Q: Does the tighter tolerance of the substitute provide any advantage?

A: The 74437321082 offers ±20% tolerance compared to ±30% for the original part. This tighter tolerance may reduce circuit performance variation and improve consistency across production batches, particularly in applications sensitive to inductance drift.

Q: What is the significance of the higher saturation current rating?

A: The substitute provides 2.4 A saturation current versus 610 mA in the original. This indicates greater core material capability and provides additional design margin for transient current conditions, though the continuous current rating of 1.3 A remains the limiting factor for steady-state operation.

Q: Are there any compliance or certification differences?

A: Both components maintain ROHS3 compliance, REACH unaffected status, and MSL 1 moisture sensitivity ratings. No compliance barriers exist for substitution.