SC4020FH-100 Equivalent & Substitute Parts

Part Overview

The SC4020FH-100 is a 10 µH unshielded wirewound inductor manufactured by Signal Transformer, rated for 5.2 A continuous current with a maximum DC resistance of 27 mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is specified at 100 kHz inductance frequency. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring fixed inductance in power conversion, filtering, and signal conditioning circuits. Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while accommodating design constraints such as board space, thermal management, or supply chain availability.

Substiute Parts

SC4020FH-100

Signal TransformerIn Stock: 761SC4020FH-100 Datasheet

Current PartRFQ

UP2B-100-R

Eaton - Electronics DivisionIn Stock: 3248UP2B-100-R Datasheet

MFR RecommendedRFQ

UP3B-100-R

Eaton - Electronics DivisionIn Stock: 1483UP3B-100-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC4020FH-100 are qualified based on the following electrical and mechanical parameters:

• Inductance Value: Must be 10 µH with ±20% tolerance
• Shielding Configuration: Must be unshielded to maintain electromagnetic compatibility with the original design
• Inductance Test Frequency: Must be specified at 100 kHz
• DC Resistance: Must not exceed 27 mOhm maximum to ensure thermal performance equivalence
• Current Rating: Must support minimum 5.2 A continuous current
• Mounting Type: Must be surface mount compatible
• RoHS Compliance: Must maintain ROHS3 compliance status
• Moisture Sensitivity: Must be MSL 1 or equivalent

The substitute parts UP2B-100-R and UP3B-100-R meet these criteria with equivalent inductance, shielding, test frequency, and compliance certifications. Both are manufactured by Eaton - Electronics Division under the UNI-PAC™ series with ferrite drum core construction.

Parameter Comparison

Engineering Selection Recommendations

Both UP2B-100-R and UP3B-100-R are qualified substitutes for the SC4020FH-100 based on electrical equivalence and compliance certifications. All three parts maintain ROHS3 compliance and MSL 1 moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols.

UP3B-100-R provides the closest dimensional match to the SC4020FH-100, with footprint dimensions of 19.30 x 13.21 mm compared to 19.50 x 13.30 mm, and maintains the same 5.2 A saturation current rating. This part is recommended when board layout constraints require minimal redesign.

UP2B-100-R offers a more compact footprint at 13.97 x 10.41 mm with reduced height of 6.00 mm, providing space optimization benefits for applications where board density is a consideration. However, this part has a lower saturation current rating of 3.3 A, which may limit its use in high-current transient conditions.

The primary design constraint for both substitutes is the reduced upper operating temperature limit of 85°C compared to the SC4020FH-100's 125°C rating. Applications operating continuously above 85°C require thermal analysis to confirm substitute part suitability.

Frequently Asked Questions (FAQ)

Q: Can UP2B-100-R and UP3B-100-R be used interchangeably with SC4020FH-100?

A: Both parts meet the core electrical specifications of 10 µH inductance at ±20% tolerance, unshielded configuration, and 100 kHz test frequency. However, application-specific factors such as operating temperature, saturation current requirements, and board space must be evaluated. UP3B-100-R is more directly compatible due to similar saturation current and dimensions.

Q: What is the impact of the reduced operating temperature range on substitute parts?

A: The SC4020FH-100 operates to 125°C, while both substitutes are rated to 85°C maximum. Applications requiring continuous operation above 85°C must conduct thermal analysis to confirm substitute part performance. For applications operating within -40°C to 85°C, no thermal derating is required.

Q: How do the saturation current differences affect circuit performance?

A: The SC4020FH-100 and UP3B-100-R both have 5.2 A saturation current ratings, providing equivalent transient current handling. UP2B-100-R has a 3.3 A saturation rating, which may limit performance in circuits experiencing current spikes above this threshold. DC resistance values are equivalent across all three parts, ensuring similar thermal dissipation characteristics.

Q: Are there footprint compatibility considerations?

A: UP3B-100-R dimensions (19.30 x 13.21 mm) closely match the SC4020FH-100 (19.50 x 13.30 mm), requiring minimal PCB layout changes. UP2B-100-R is significantly smaller (13.97 x 10.41 mm), which may require PCB redesign but offers space savings. All three parts use standard surface mount packaging compatible with automated assembly equipment.

Q: Do all parts meet the same compliance requirements?

A: Yes. SC4020FH-100, UP2B-100-R, and UP3B-100-R are all ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. All parts have MSL 1 moisture sensitivity ratings, requiring no special handling during storage or assembly.