SCRH105R-330 Equivalent & Substitute Parts

Part Overview

The SCRH105R-330 is a 33 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 2.7 A continuous current with a maximum DC resistance of 84 mOhm. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications while maintaining performance within specified tolerances.

Key Parameters

Parameter	Value
Inductance	33 µH
Inductance Tolerance	±30%
Current Rating	2.7 A
DC Resistance (DCR)	84 mOhm Max
Shielding	Shielded
Operating Temperature Range	-40°C ~ 125°C
Mounting Type	Surface Mount
Package Type	Nonstandard
Size	10.50mm x 10.30mm x 5.10mm (Max Height)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SCRH105R-330 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Inductance value: 33 µH (±30% tolerance band)
Inductance test frequency: 100 kHz
Shielding requirement: Shielded construction
Mounting type: Surface Mount
Physical dimensions: Compatible footprint (10.50mm x 10.30mm base dimensions)
RoHS compliance: ROHS3 Compliant

Allowable Variation Parameters:

Current rating: Minimum 2.5 A (substitute parts may have equal or higher ratings)
DC resistance: Up to 84 mOhm maximum
Operating temperature: Minimum -40°C to 100°C (original supports to 125°C)
Saturation current: Varies by design

The two identified substitute parts meet these criteria while maintaining functional equivalence in 33 µH shielded inductor applications.

Parameter Comparison

Parameter	SCRH105R-330 (Signal Transformer)	CDRH105RNP-330NC (Sumida)	DR1050-330-R (Eaton)
Inductance	33 µH	33 µH	33 µH
Inductance Tolerance	±30%	±30%	±30%
Current Rating (Amps)	2.7 A	2.5 A	2.56 A
Current - Saturation (Isat)	1.88 A	2.4 A	2.5 A
DC Resistance (DCR)	84 mOhm Max	84 mOhm Max	71.9 mOhm Max
Shielding	Shielded	Shielded	Shielded
Operating Temperature	-40°C ~ 125°C	-40°C ~ 100°C	-40°C ~ 125°C
Inductance Frequency - Test	100 kHz	100 kHz	100 kHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	10.50mm x 10.30mm	10.20mm x 10.00mm	10.50mm x 10.30mm
Height - Seated (Max)	5.10mm	5.10mm	5.00mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)

Engineering Selection Recommendations

CDRH105RNP-330NC (Sumida America Components Inc.): This substitute is suitable for applications where current rating of 2.5 A is sufficient. The component maintains identical inductance, tolerance, and DC resistance specifications. Operating temperature range extends to 100°C, which is acceptable for most industrial applications. Saturation current is higher at 2.4 A compared to the original 1.88 A. Physical dimensions are slightly smaller (10.20mm x 10.00mm), which may require PCB layout verification for footprint compatibility. RoHS3 compliance and MSL 1 rating are maintained. Available inventory is 7400 units.

DR1050-330-R (Eaton - Electronics Division): This substitute provides the highest current rating at 2.56 A and the lowest DC resistance at 71.9 mOhm maximum, offering improved thermal performance. Operating temperature range matches the original at -40°C to 125°C. Physical dimensions and height are identical to the original part, ensuring direct PCB compatibility. Saturation current is 2.5 A. RoHS3 compliance and MSL 1 rating are maintained. This part is specified as Drum Core, Wirewound construction. Available inventory is 3244 units.

Both substitutes maintain Active product status and full regulatory compliance. Selection between them depends on current requirement headroom and thermal performance priorities in the target application.

Frequently Asked Questions (FAQ)

Q: Can CDRH105RNP-330NC be used as a direct replacement for SCRH105R-330? A: CDRH105RNP-330NC is electrically equivalent for applications requiring 2.5 A or less. The 33 µH inductance, ±30% tolerance, and 84 mOhm DCR are identical. Physical dimensions are slightly smaller (10.20mm x 10.00mm versus 10.50mm x 10.30mm), requiring PCB layout verification. Operating temperature maximum is 100°C versus 125°C for the original.

Q: What are the differences in current handling between the three parts? A: SCRH105R-330 is rated for 2.7 A continuous current with 1.88 A saturation. CDRH105RNP-330NC is rated for 2.5 A continuous with 2.4 A saturation. DR1050-330-R is rated for 2.56 A continuous with 2.5 A saturation. Selection depends on circuit current requirements and saturation margin needs.

Q: Is DR1050-330-R a better choice due to lower DC resistance? A: DR1050-330-R offers 71.9 mOhm maximum DCR compared to 84 mOhm for the original, resulting in lower power dissipation and improved thermal performance. It maintains identical physical dimensions and full temperature range (-40°C to 125°C). This makes it suitable when thermal efficiency is a design priority.

Q: Are all three parts RoHS3 compliant? A: Yes, all three parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, meeting regulatory requirements for industrial and commercial applications.

Q: What packaging options are available? A: SCRH105R-330 and DR1050-330-R are supplied in Tape & Reel (TR) packaging. CDRH105RNP-330NC is available in Cut Tape (CT) and Digi-Reel® packaging options.

Q: Can these parts be used interchangeably in high-temperature applications? A: SCRH105R-330 and DR1050-330-R support -40°C to 125°C operation. CDRH105RNP-330NC is rated to 100°C maximum. For applications exceeding 100°C, use SCRH105R-330 or DR1050-330-R.

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