DR124-6R8-R Equivalent & Substitute Parts

Part Overview

The DR124-6R8-R is a 6.8 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with moderate current handling capability. The part is currently in active production status with 1301 pieces available in inventory.

Substitute parts are identified when equivalent electrical and mechanical specifications can satisfy the same application requirements. The DR124-6R8-R has one qualified substitute part that maintains critical performance parameters within acceptable tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	6.8	µH
Inductance Tolerance	±20%	-
Current Rating	5.6	A
DC Resistance (Max)	21.7	mOhm
Core Material	Ferrite	-
Shielding	Shielded	-
Mounting Type	Surface Mount	-
Package Dimensions	12.50 x 12.50 x 4.50	mm
Operating Temperature Range	-40 to 125	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the DR124-6R8-R is determined by the following critical parameters:

Electrical Specifications:

Inductance value: 6.8 µH at 100 kHz test frequency
Inductance tolerance: ±20%
DC resistance: Maximum 21.7 mOhm
Current rating: Minimum 5.2 A continuous capability

Mechanical Specifications:

Core type: Ferrite drum core, wirewound, shielded
Mounting: Surface mount configuration
Package dimensions: 12.50 mm L x 12.50 mm W x 4.50 mm H (maximum seated height)
Package type: Nonstandard

Compliance Requirements:

RoHS3 compliance
Moisture sensitivity level: 1 (Unlimited)
Operating temperature range: -40°C to 125°C

The SRR1240-6R8M from Bourns Inc. meets all substitution criteria within these defined parameters.

Parameter Comparison

Parameter	DR124-6R8-R (Eaton)	SRR1240-6R8M (Bourns)	Compatibility
Inductance	6.8 µH	6.8 µH	Identical
Inductance Tolerance	±20%	±20%	Identical
Current Rating	5.6 A	5.2 A	Compatible
DC Resistance (Max)	21.7 mOhm	23 mOhm	Compatible
Core Material	Ferrite	Ferrite	Identical
Shielding	Shielded	Shielded	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package Dimensions (L x W x H)	12.50 x 12.50 x 4.50 mm	12.50 x 12.50 x 4.50 mm	Identical
Operating Temperature	-40 to 125°C	-40 to 125°C	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Active	Active	Both in production

Engineering Selection Recommendations

Primary Selection: DR124-6R8-R

The DR124-6R8-R remains the primary component choice when available. This part is actively manufactured by Eaton - Electronics Division with 1301 pieces in current inventory. The component meets all ROHS3 compliance requirements and operates across the full -40°C to 125°C temperature range.

Substitute Selection: SRR1240-6R8M

The SRR1240-6R8M from Bourns Inc. is a qualified substitute when the primary part is unavailable. This component maintains identical inductance specifications, core material, shielding configuration, and package dimensions. The substitute part is also actively produced and ROHS3 compliant.

Compatibility Considerations:

The SRR1240-6R8M exhibits a 0.4 mOhm increase in maximum DC resistance (23 mOhm versus 21.7 mOhm) and a 0.4 A reduction in current rating (5.2 A versus 5.6 A). These differences remain within acceptable engineering tolerances for applications designed around the DR124-6R8-R specifications. Both parts share identical package footprints and thermal operating ranges, enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SRR1240-6R8M be used as a direct replacement for the DR124-6R8-R on existing PCB layouts?

A: Yes. Both components share identical package dimensions (12.50 mm x 12.50 mm x 4.50 mm maximum height) and surface mount configuration. No PCB layout changes are required for substitution.

Q: What is the impact of the 0.4 A difference in current rating between these parts?

A: The DR124-6R8-R is rated for 5.6 A continuous current, while the SRR1240-6R8M is rated for 5.2 A. Applications operating below 5.2 A experience no functional impact. Applications requiring current between 5.2 A and 5.6 A must evaluate thermal and saturation performance for the substitute part.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the DR124-6R8-R and SRR1240-6R8M are ROHS3 compliant and carry moisture sensitivity level 1 (unlimited), indicating no special handling requirements during storage or assembly.

Q: What is the inductance tolerance for both parts?

A: Both parts maintain ±20% inductance tolerance at the 100 kHz test frequency. This tolerance applies equally to the primary and substitute components.

Q: How do the DC resistance specifications compare?

A: The DR124-6R8-R specifies 21.7 mOhm maximum DC resistance, while the SRR1240-6R8M specifies 23 mOhm maximum. The 1.3 mOhm difference represents approximately 6% variation and remains within typical circuit design margins for inductor applications.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Both parts are ferrite drum core inductors with shielding designed for surface mount applications. The SRR1240-6R8M provides additional frequency characterization data (Q @ 7.96 MHz = 14, self-resonant frequency = 34 MHz). Applications requiring specific high-frequency performance should reference the complete frequency response data for each manufacturer.

Q: What inventory status should be considered when selecting between these parts?

A: The DR124-6R8-R has 1301 pieces in stock, while the SRR1240-6R8M has 1454 pieces available. Both parts maintain active production status with adequate supply for standard procurement timelines.

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