SCRH124B-330 Equivalent & Substitute Parts

Part Overview

The SCRH124B-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 111mOhm 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. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductance value and current rating category.

Key Parameters

Parameter	Value	Unit
Inductance	33	µH
Inductance Tolerance	±20%	—
Current Rating	2.43	A
Current - Saturation (Isat)	2.7	A
DC Resistance (DCR)	111	mOhm Max
Shielding	Shielded	—
Operating Temperature Range	-40 to 125	°C
Mounting Type	Surface Mount	—
Package Size	12.50 x 12.50 x 4.80	mm (L x W x H)
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

The DR124-330-R from Eaton - Electronics Division qualifies as a direct substitute based on the following alignment of critical electrical and mechanical parameters:

Inductance equivalence: Both parts specify 33 µH at ±20% tolerance, measured at 100 kHz test frequency.

Current performance: The substitute part provides 2.6 A continuous current rating and 3.12 A saturation current, both exceeding the main part requirements of 2.43 A and 2.7 A respectively.

DC resistance: The substitute part specifies 97mOhm maximum DCR, which is lower than the main part's 111mOhm maximum, resulting in improved efficiency characteristics.

Shielding and mounting: Both parts are shielded inductors with surface mount configuration and identical package footprint dimensions of 12.50mm x 12.50mm.

Environmental compliance: Both parts maintain identical operating temperature range (-40°C to 125°C), RoHS3 compliance status, and unlimited moisture sensitivity rating (MSL 1).

Mechanical compatibility: The substitute part height of 4.50mm is within acceptable tolerance relative to the main part's 4.80mm seated height for standard PCB assembly processes.

Parameter Comparison

Parameter	SCRH124B-330 (Signal Transformer)	DR124-330-R (Eaton)	Compatibility
Inductance	33 µH ±20%	33 µH ±20%	Equivalent
Current Rating	2.43 A	2.6 A	Substitute exceeds requirement
Saturation Current (Isat)	2.7 A	3.12 A	Substitute exceeds requirement
DC Resistance (DCR)	111 mOhm Max	97 mOhm Max	Substitute provides lower resistance
Shielding	Shielded	Shielded	Equivalent
Operating Temperature	-40°C to 125°C	-40°C to 125°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Footprint	12.50 x 12.50 mm	12.50 x 12.50 mm	Equivalent
Height - Seated (Max)	4.80 mm	4.50 mm	Substitute is lower profile
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Both the SCRH124B-330 and DR124-330-R maintain Active product status with full regulatory compliance. The DR124-330-R substitute part provides measurable performance advantages: increased current capacity margin (2.6 A vs. 2.43 A), higher saturation current (3.12 A vs. 2.7 A), and reduced DC resistance (97mOhm vs. 111mOhm). The lower profile height of 4.50mm may provide additional clearance benefits in space-constrained PCB layouts. Both parts carry identical environmental certifications (RoHS3, REACH Unaffected, EAR99 classification) and unlimited moisture sensitivity rating, ensuring equivalent reliability in production and field deployment. Selection between these parts should be based on supply chain availability and specific thermal performance requirements in the target application.

Frequently Asked Questions (FAQ)

Q: Can the DR124-330-R replace the SCRH124B-330 in existing designs without PCB modification?

A: Yes. Both inductors share identical package footprint dimensions (12.50mm x 12.50mm) and surface mount configuration. The substitute part's lower seated height (4.50mm vs. 4.80mm) provides additional clearance and does not require PCB layout changes.

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

A: The DR124-330-R specifies 97mOhm maximum DCR compared to 111mOhm in the SCRH124B-330. Lower DCR reduces resistive losses and heat generation during operation, improving overall circuit efficiency without changing the inductance value or current handling characteristics.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the SCRH124B-330 and DR124-330-R operate across -40°C to 125°C, maintaining identical thermal specifications for industrial and commercial applications.

Q: How do the current ratings compare between these parts?

A: The DR124-330-R provides higher current capacity at 2.6 A continuous and 3.12 A saturation current, exceeding the SCRH124B-330 ratings of 2.43 A and 2.7 A respectively. This provides additional design margin in current-limited applications.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both inductors are RoHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both carry unlimited moisture sensitivity rating (MSL 1), ensuring equivalent handling and storage requirements.

Q: What determines whether a part qualifies as a substitute for the SCRH124B-330?

A: Substitution is based on matching inductance value (33 µH ±20%), meeting or exceeding current ratings, maintaining shielded configuration, identical surface mount package footprint, and equivalent environmental operating range and compliance certifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message