DR124-271-R Equivalent & Substitute Parts Reference

Part Overview

The DR124-271-R is a 270 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 classified as Active status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or application-specific performance needs within the defined parameter tolerance ranges.

Substiute Parts

DR124-271-R

Eaton - Electronics DivisionIn Stock: 1099DR124-271-R Datasheet

Current PartRFQ

PA4303.274NLT

Pulse ElectronicsIn Stock: 4888PA4303.274NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DR124-271-R is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 270 µH (within ±20% tolerance specification)
• Core type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration
• Mounting: Surface mount technology
• Package footprint: 12.50 x 12.50 mm base dimensions
• Operating temperature range: -40°C to 125°C minimum
• RoHS3 compliance status

Allowable Variation Parameters:

• Current rating: Substitute must support the application's required current; lower ratings are not acceptable for direct substitution
• DC resistance: Lower DCR values are acceptable; higher values may increase power dissipation
• Height: Minor variations acceptable if PCB clearance permits
• Inductance test frequency: May differ (100 kHz vs. 1 kHz) without affecting substitution validity

The PA4303.274NLT from Pulse Electronics meets these substitution criteria with the exception of current rating, which is specified at 650 mA versus the DR124-271-R's 880 mA rating. This difference requires application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: DR124-271-R

The DR124-271-R remains the preferred selection when available. It provides the specified 880 mA current rating with 870 mOhm maximum DC resistance. The component is Active status, RoHS3 compliant, and available in volume (1074 pcs in stock). The 4.50 mm seated height accommodates standard PCB clearance requirements.

Substitute Part: PA4303.274NLT

The PA4303.274NLT from Pulse Electronics is electrically and mechanically compatible for applications where the 650 mA current rating is sufficient. The substitute offers improved DC resistance (741 mOhm maximum), reducing power dissipation by approximately 15%. The 5.00 mm seated height requires verification against PCB assembly constraints. Both components maintain RoHS3 compliance and identical operating temperature ranges. The PA4303.274NLT is available in higher volume (4874 pcs in stock).

Selection Criteria:

• Use DR124-271-R when application current requirement exceeds 650 mA
• Use PA4303.274NLT when application current requirement is 650 mA or lower and PCB height clearance permits 5.00 mm maximum seated height
• Both parts satisfy identical inductance, tolerance, core material, shielding, and regulatory requirements

Frequently Asked Questions (FAQ)

Q: Can PA4303.274NLT replace DR124-271-R in all applications?

A: No. The PA4303.274NLT has a maximum current rating of 650 mA compared to the DR124-271-R's 880 mA rating. Substitution is valid only when the application's maximum continuous current requirement does not exceed 650 mA. Exceeding this rating may cause inductor saturation and performance degradation.

Q: What is the impact of the 0.50 mm height difference?

A: The PA4303.274NLT has a maximum seated height of 5.00 mm versus 4.50 mm for the DR124-271-R. This 0.50 mm difference must be evaluated against PCB assembly clearance, component stacking, and enclosure constraints. Verify clearance before substitution.

Q: Are the inductance values identical?

A: Yes. Both components are specified at 270 µH with ±20% tolerance. The inductance test frequencies differ (100 kHz for DR124-271-R, 1 kHz for PA4303.274NLT), but this does not affect substitution validity for fixed inductance applications.

Q: Does the lower DC resistance of PA4303.274NLT provide an advantage?

A: The PA4303.274NLT's 741 mOhm maximum DCR is approximately 15% lower than the DR124-271-R's 870 mOhm maximum. This reduces I²R power dissipation and thermal generation. However, this advantage is only realized when the 650 mA current rating is not exceeded.

Q: Are both parts RoHS3 compliant?

A: Yes. Both DR124-271-R and PA4303.274NLT are RoHS3 compliant. Both are suitable for applications with RoHS regulatory requirements.

Q: What is the difference in saturation current?

A: The DR124-271-R specifies saturation current (Isat) at 1.09 A. The PA4303.274NLT does not provide saturation current specification in the available data. For applications requiring saturation current data, the DR124-271-R is the preferred selection.

Q: Can these parts be used interchangeably in PCB assembly?

A: Both components use identical surface mount packaging (Tape & Reel) and 12.50 x 12.50 mm footprints. Assembly equipment compatibility is maintained. The 0.50 mm height difference requires verification against pick-and-place machine settings and PCB clearance.

Q: Which part should be selected for new designs?

A: For new designs, evaluate the application's maximum continuous current requirement. If current does not exceed 650 mA, either part is acceptable. The PA4303.274NLT offers improved availability (4874 pcs vs. 1074 pcs) and lower DC resistance. If current exceeds 650 mA, the DR124-271-R is mandatory.