SCRH124-330 Equivalent & Substitute Parts

Part Overview

The SCRH124-330 is a 33 µH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 2.43 A continuous current with a maximum DC resistance of 97 mOhm and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute components become necessary when primary part availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility within specified tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20%	-
Current Rating	2.43	A
DC Resistance (Max)	97	mOhm
Shielding	Shielded	-
Mounting Type	Surface Mount	-
Package Dimensions	12.50 x 12.50 x 4.50	mm
Operating Temperature	-40 to 125	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the SCRH124-330 is determined by strict alignment of the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

Inductance value: 33 µH (within ±20% tolerance band)
DC resistance: 97 mOhm maximum
Current rating: minimum 2.43 A continuous
Shielding configuration: Shielded
Operating temperature range: -40°C to 125°C minimum

Mechanical Compatibility Criteria:

Mounting type: Surface Mount
Package footprint: 12.50 mm × 12.50 mm
Height (seated): 4.50 mm maximum
Packaging format: Tape & Reel (TR)

Compliance Requirements:

RoHS3 compliance mandatory
MSL rating: 1 (Unlimited)

The DR124-330-R from Eaton - Electronics Division meets all specified electrical and mechanical parameters, with equivalent inductance, DC resistance, and thermal operating range. The substitute maintains identical package dimensions and surface mount configuration, ensuring direct PCB compatibility.

Parameter Comparison

Parameter	SCRH124-330 (Signal Transformer)	DR124-330-R (Eaton)	Match Status
Inductance	33 µH	33 µH	Equivalent
Inductance Tolerance	±20%	±20%	Equivalent
Current Rating	2.43 A	2.6 A	Compatible (higher rating)
Current - Saturation	2.7 A	3.12 A	Compatible (higher rating)
DC Resistance (Max)	97 mOhm	97 mOhm	Equivalent
Shielding	Shielded	Shielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Dimensions	12.50 x 12.50 mm	12.50 x 12.50 mm	Equivalent
Height - Seated (Max)	4.50 mm	4.50 mm	Equivalent
Operating Temperature	-40 to 125°C	-40 to 125°C	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

The DR124-330-R qualifies as a direct substitute for the SCRH124-330 based on electrical parameter equivalence and mechanical compatibility. Both components maintain Active product status with full RoHS3 compliance and identical moisture sensitivity ratings, ensuring regulatory and environmental compliance across applications.

The Eaton DR124-330-R provides enhanced current handling capability (2.6 A vs. 2.43 A) and higher saturation current (3.12 A vs. 2.7 A), offering additional design margin in current-limited applications. DC resistance remains at the specified 97 mOhm maximum, preserving thermal performance characteristics.

Selection between these components should be based on availability, lead time requirements, and supply chain considerations, as both meet the specified electrical and mechanical requirements for surface mount 33 µH shielded inductor applications.

Frequently Asked Questions (FAQ)

Q: Can the DR124-330-R be used as a direct replacement for the SCRH124-330 on existing PCBs?

A: Yes. Both components share identical package dimensions (12.50 × 12.50 × 4.50 mm), surface mount configuration, and footprint requirements. No PCB layout modifications are necessary.

Q: Are there differences in inductance value between these parts?

A: No. Both components are specified at 33 µH with ±20% tolerance, measured at 100 kHz. Inductance values are equivalent within the tolerance band.

Q: What is the significance of the higher current rating on the DR124-330-R?

A: The DR124-330-R supports 2.6 A continuous current versus 2.43 A for the SCRH124-330. This provides additional design margin and allows operation in applications requiring higher current capacity without exceeding component ratings.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SCRH124-330 and DR124-330-R are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compliance requirements are identical.

Q: Is the DC resistance specification the same for both inductors?

A: Yes. Both components specify a maximum DC resistance of 97 mOhm, ensuring equivalent thermal performance and power dissipation characteristics in circuit applications.

Q: What packaging formats are available for these substitute parts?

A: Both components are supplied in Tape & Reel (TR) format, standard for automated assembly processes and high-volume production environments.

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