SCRH105R-101 Equivalent & Substitute Parts

Part Overview

The SCRH105R-101 is a 100 µH shielded surface mount inductor manufactured by Signal Transformer, rated for 1.42 A continuous current with a maximum DC resistance of 253 mOhm. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Key Parameters

Parameter	Value	Unit
Inductance	100	µH
Inductance Tolerance	±30	%
Current Rating	1.42	A
DC Resistance (Max)	253	mOhm
Saturation Current	1.09	A
Operating Temperature Range	-40 to 125	°C
Shielding	Shielded	—
Mounting Type	Surface Mount	—
Package	Nonstandard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH105R-101 is determined by the following criteria:

Primary Electrical Parameters:

Inductance value: 100 µH (within ±30% tolerance)
Current rating: minimum 1.35 A (acceptable for applications rated up to 1.42 A)
DC resistance: maximum 253 mOhm (lower values acceptable)
Saturation current: minimum 1.09 A

Mechanical & Environmental Parameters:

Shielding: Shielded construction required
Mounting: Surface mount configuration
Package dimensions: Nonstandard case compatible with 10.50mm × 10.30mm footprint
Operating temperature: -40°C minimum and 125°C maximum (or subset thereof)
Moisture sensitivity: MSL 1 (Unlimited)

Compliance Parameters:

RoHS3 compliance required
Packaging: Tape & Reel (TR)
Inductance test frequency: 100 kHz

Parts meeting all primary electrical parameters and mechanical constraints are classified as direct substitutes.

Parameter Comparison

Parameter	SCRH105R-101 (Signal Transformer)	CDRH105RNP-101NC (Sumida)	DR1050-101-R (Eaton)
Inductance	100 µH	100 µH	100 µH
Inductance Tolerance	±30%	±30%	±30%
Current Rating (Amps)	1.42	1.35	1.52
Saturation Current (Isat)	1.09	1.35	1.45
DC Resistance (Max)	253 mOhm	253 mOhm	205 mOhm
Shielding	Shielded	Shielded	Shielded
Operating Temperature Range	-40 to 125°C	-40 to 100°C	-40 to 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard	Nonstandard	Nonstandard
Size / Dimension	10.50 × 10.30 mm	10.20 × 10.00 mm	10.50 × 10.30 mm
Height (Max)	5.10 mm	5.10 mm	5.00 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inductance Test Frequency	100 kHz	100 kHz	100 kHz
Packaging	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

CDRH105RNP-101NC (Sumida America Components Inc.): This substitute meets all primary electrical parameters with equivalent inductance, tolerance, and DC resistance specifications. Current rating of 1.35 A is acceptable for applications designed for the 1.42 A SCRH105R-101. The saturation current of 1.35 A exceeds the original specification. RoHS3 compliance and MSL 1 rating are maintained. Operating temperature range is -40 to 100°C, which is narrower than the original -40 to 125°C specification. Physical dimensions are slightly smaller (10.20 × 10.00 mm versus 10.50 × 10.30 mm) but remain compatible with nonstandard surface mount applications. This part is suitable for applications not requiring operation above 100°C.

DR1050-101-R (Eaton - Electronics Division): This substitute provides superior electrical performance with a current rating of 1.52 A and saturation current of 1.45 A, both exceeding the original SCRH105R-101 specifications. DC resistance is reduced to 205 mOhm maximum, providing lower losses. Operating temperature range matches the original at -40 to 125°C. Physical dimensions are identical to the original (10.50 × 10.30 mm), with height reduced to 5.00 mm. RoHS3 compliance and MSL 1 rating are maintained. This part is suitable for all applications compatible with the SCRH105R-101 and offers enhanced thermal and current handling capabilities.

Frequently Asked Questions (FAQ)

Q: Can CDRH105RNP-101NC be used in applications requiring operation above 100°C? A: No. The CDRH105RNP-101NC operating temperature range is -40 to 100°C. Applications requiring operation up to 125°C must use the SCRH105R-101 or DR1050-101-R.

Q: What is the significance of the current rating difference between SCRH105R-101 (1.42 A) and CDRH105RNP-101NC (1.35 A)? A: The CDRH105RNP-101NC has a lower continuous current rating. For applications operating at or near 1.42 A, the DR1050-101-R (1.52 A rating) is the preferred substitute.

Q: Are the physical dimensions of these substitutes compatible with the original PCB layout? A: SCRH105R-101 and DR1050-101-R share identical footprint dimensions (10.50 × 10.30 mm). CDRH105RNP-101NC has slightly smaller dimensions (10.20 × 10.00 mm) and may require PCB layout verification for tight spacing applications.

Q: Do all three parts maintain the same DC resistance specification? A: SCRH105R-101 and CDRH105RNP-101NC both specify 253 mOhm maximum DC resistance. DR1050-101-R provides lower DC resistance at 205 mOhm maximum, resulting in reduced power dissipation.

Q: Are all substitute parts RoHS3 compliant? A: Yes. SCRH105R-101, CDRH105RNP-101NC, and DR1050-101-R are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the core material difference between these inductors? A: SCRH105R-101 core material is not specified. CDRH105RNP-101NC and DR1050-101-R both use ferrite core material. DR1050-101-R is specifically identified as drum core, wirewound construction.

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