SCRH4D14R-330 Equivalent & Substitute Parts

Part Overview

The SCRH4D14R-330 is a 33 µH shielded inductor manufactured by Signal Transformer, rated for 470 mA continuous current with a maximum DC resistance of 1.03Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across an industrial temperature range of -40°C to 125°C and meets ROHS3 compliance requirements.

Substiute Parts

SCRH4D14R-330

Signal TransformerIn Stock: 928SCRH4D14R-330 Datasheet

Current PartRFQ

VLCF4020T-330MR47

TDK CorporationIn Stock: 2259VLCF4020T-330MR47 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCRH4D14R-330 is based on the following critical parameters:

Electrical Compatibility:

• Inductance value of 33 µH at 100 kHz test frequency
• Current rating minimum of 470 mA
• DC resistance not exceeding 1.03 Ohm (lower DCR values are acceptable as they reduce power dissipation)
• Saturation current capability at or above the operating current

Mechanical & Environmental Compatibility:

• Surface mount configuration
• Shielded construction to maintain electromagnetic isolation
• Operating temperature range encompassing -40°C to 125°C
• Nonstandard package footprint with dimensions 4.10mm x 4.10mm (L x W) and height 1.50mm maximum

Regulatory & Quality:

• ROHS3 compliance
• MSL rating of 1 (Unlimited)

The VLCF4020T-330MR47 from TDK Corporation meets these substitution criteria with equivalent electrical performance and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The VLCF4020T-330MR47 is a direct functional substitute for the obsolete SCRH4D14R-330. Both components meet ROHS3 compliance and carry MSL rating 1 (Unlimited), ensuring equivalent environmental and regulatory qualification.

The TDK substitute offers improved electrical performance with lower DC resistance (628 mOhm versus 1.03 Ohm), resulting in reduced power dissipation and improved efficiency. The saturation current rating of 470 mA matches the continuous current rating, providing superior headroom compared to the original part's 240 mA saturation specification.

The substitute maintains shielded construction and surface mount configuration. Physical dimensions are comparable (4.00mm x 4.00mm footprint versus 4.10mm x 4.10mm), with a slightly increased height of 2.00mm versus 1.50mm. The operating temperature range of the substitute extends to 105°C, which covers the majority of industrial applications; designs requiring operation above 105°C must be evaluated separately.

The active product status of the VLCF4020T-330MR47 ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the VLCF4020T-330MR47 be used as a direct replacement for the SCRH4D14R-330?

A: Yes. Both components share identical inductance values (33 µH), current ratings (470 mA), shielding characteristics, and surface mount configuration. Electrical and mechanical compatibility is established across the specified operating parameters.

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

A: The VLCF4020T-330MR47 exhibits 628 mOhm maximum DC resistance compared to 1.03 Ohm in the original part. This reduction decreases resistive losses and power dissipation, improving overall circuit efficiency. No negative impact on circuit function occurs from this improvement.

Q: Are there physical footprint differences between these parts?

A: The substitute part footprint is 4.00mm x 4.00mm compared to 4.10mm x 4.10mm for the original. This 0.10mm reduction in length and width is negligible for most PCB layouts. The substitute height increases from 1.50mm to 2.00mm; designs with height constraints must verify clearance.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the SCRH4D14R-330 and VLCF4020T-330MR47 are ROHS3 compliant with MSL rating 1 (Unlimited), ensuring equivalent environmental and moisture sensitivity qualification.

Q: What is the difference in inductance tolerance between these parts?

A: The original part carries ±30% tolerance, while the substitute offers tighter ±20% tolerance. The substitute's improved tolerance specification provides better circuit performance predictability without requiring design modifications.

Q: Is the operating temperature range difference significant?

A: The original part operates to 125°C, while the substitute operates to 105°C. For applications requiring sustained operation above 105°C, the substitute may not be suitable. Most industrial and commercial applications operate within the 105°C limit of the substitute part.