DR1050-2R2-R Equivalent & Substitute Parts

Part Overview

The DR1050-2R2-R is a 2.2 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is designed for applications requiring fixed inductance with high current handling capability. The part is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified when design requirements permit tolerance in current rating, DC resistance, or physical dimensions while maintaining the core electrical specifications of 2.2 µH inductance at 100 kHz test frequency.

Key Parameters

Parameter	Value	Unit
Inductance	2.2	µH
Inductance Tolerance	±30%	%
Current Rating	7.52	A
DC Resistance (DCR)	6.8	mOhm Max
Core Material	Ferrite	—
Shielding	Shielded	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40°C to 125°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the DR1050-2R2-R is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 2.2 µH (fixed requirement)
Inductance tolerance: ±30% (fixed requirement)
Core type: Ferrite drum core, wirewound (fixed requirement)
Shielding: Shielded configuration (fixed requirement)
Mounting: Surface mount technology (fixed requirement)
Test frequency: 100 kHz (fixed requirement)

Secondary Tolerance Parameters:

Current rating: Substitute must meet or exceed application current requirements
DC resistance: Lower DCR values are acceptable; higher values require application verification
Physical dimensions: Nonstandard packages permit dimensional variation within assembly constraints
Operating temperature: -40°C to 125°C range (fixed requirement)

The SRU1048-2R2Y from Bourns Inc. qualifies as a substitute when the application current requirement does not exceed 6.5 A and the circuit design accommodates the lower saturation current specification.

Parameter Comparison

Parameter	DR1050-2R2-R (Eaton)	SRU1048-2R2Y (Bourns)	Compatibility Notes
Inductance	2.2 µH	2.2 µH	Identical
Inductance Tolerance	±30%	±30%	Identical
Current Rating (Amps)	7.52 A	6.5 A	Substitute rated lower; verify application current
Current - Saturation (Isat)	9.25 A	6.3 A	Substitute has lower saturation point
DC Resistance (DCR)	6.8 mOhm Max	5.3 mOhm	Substitute has lower resistance; beneficial for power loss
Core Material	Ferrite	Ferrite	Identical
Shielding	Shielded	Shielded	Identical
Type	Drum Core, Wirewound	Drum Core, Wirewound	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature	-40°C to 125°C	-40°C to 125°C	Identical
Size / Dimension	10.50mm L x 10.30mm W	10.00mm L x 10.00mm W	Substitute is slightly smaller; verify PCB layout
Height - Seated (Max)	5.00 mm	5.10 mm	Substitute is marginally taller; verify clearance
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	1 (Unlimited)	1 (Unlimited)	Identical
REACH Status	REACH Unaffected	REACH Unaffected	Identical

Engineering Selection Recommendations

Primary Part Selection: The DR1050-2R2-R remains the specified component when the application requires the full 7.52 A current rating or when saturation current of 9.25 A is a design requirement. This part is Active status with full RoHS3 and REACH compliance.

Substitute Part Selection: The SRU1048-2R2Y from Bourns Inc. is suitable for applications where:

Maximum continuous current does not exceed 6.5 A
Saturation current specification of 6.3 A is acceptable
PCB layout accommodates the 10.00mm x 10.00mm footprint (0.5mm smaller in length and width)
Vertical clearance accommodates 5.10mm maximum seated height

Both parts maintain identical inductance, tolerance, core material, shielding, mounting technology, and temperature operating range. Both are Active status products with ROHS3 compliance and unlimited moisture sensitivity rating.

Compliance Verification: Both the DR1050-2R2-R and SRU1048-2R2Y are classified under HTSUS code 8504.50.4000 and ECCN EAR99, with identical regulatory status for REACH and RoHS3 requirements.

Frequently Asked Questions (FAQ)

Q: Can the SRU1048-2R2Y replace the DR1050-2R2-R in all applications?

A: No. The SRU1048-2R2Y has a lower current rating (6.5 A versus 7.52 A) and lower saturation current (6.3 A versus 9.25 A). Substitution is valid only when the application current requirement does not exceed 6.5 A continuous and the circuit design accommodates the lower saturation specification.

Q: What is the impact of the lower DC resistance in the SRU1048-2R2Y?

A: The SRU1048-2R2Y has 5.3 mOhm DCR compared to 6.8 mOhm maximum for the DR1050-2R2-R. Lower DC resistance reduces resistive power loss in the inductor, which is beneficial for thermal performance and efficiency. This is not a limiting factor for substitution.

Q: Are there physical dimension differences between these parts?

A: Yes. The SRU1048-2R2Y is 10.00mm x 10.00mm (0.5mm smaller in both length and width) compared to the DR1050-2R2-R at 10.50mm x 10.30mm. The SRU1048-2R2Y is also 0.10mm taller (5.10mm versus 5.00mm). Verify PCB layout and clearance requirements before substitution.

Q: Do both parts have identical inductance specifications?

A: Yes. Both the DR1050-2R2-R and SRU1048-2R2Y are specified at 2.2 µH with ±30% tolerance, tested at 100 kHz. Inductance value and tolerance are identical.

Q: What is the moisture sensitivity level for both parts?

A: Both parts are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the DR1050-2R2-R and SRU1048-2R2Y are ROHS3 compliant with REACH Unaffected status.

Q: What is the key limiting factor for using the SRU1048-2R2Y as a substitute?

A: The current rating is the primary limiting factor. The SRU1048-2R2Y is rated for 6.5 A continuous current with 6.3 A saturation current, compared to 7.52 A continuous and 9.25 A saturation for the DR1050-2R2-R. Applications requiring higher current must use the DR1050-2R2-R.

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