DRA125-102-R Equivalent & Substitute Parts

Part Overview

The DRA125-102-R is a 1 mH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 552 mA continuous current with a DC resistance of 1.78 Ohm and operates across the temperature range of -40°C to 165°C. The part maintains Active product status and carries AEC-Q200 qualification, making it suitable for automotive and industrial applications requiring reliable inductance performance.

Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed tolerances for this inductor category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

DRA125-102-R

Eaton - Electronics DivisionIn Stock: 576035DRA125-102-R Datasheet

Current PartRFQ

SRR1260A-102K

Bourns Inc.In Stock: 33539SRR1260A-102K Datasheet

DirectRFQ

B82477G4105M000

EPCOS - TDK ElectronicsIn Stock: 1482B82477G4105M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DRA125-102-R are classified based on strict alignment of core electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 1 mH (exact match required)
• Inductance tolerance: ±20% or tighter
• Current rating: minimum 552 mA
• DC resistance: within 1.68 to 1.78 Ohm range
• Shielding: Shielded configuration
• Mounting type: Surface Mount
• Package footprint: 12.50 x 12.50 mm base dimension
• Product status: Active
• Compliance: AEC-Q200 and ROHS3

Identified Substitute Parts:

Direct Substitute - SRR1260A-102K (Bourns Inc.): Meets all primary criteria with tighter inductance tolerance (±10%), higher current rating (680 mA), and equivalent DC resistance (1.7 Ohm Max). Operating temperature range is -40°C to 125°C. Drum core, wirewound construction with ferrite core material.

Similar Substitute - B82477G4105M000 (EPCOS - TDK Electronics): Meets primary criteria with matching inductance tolerance (±20%), comparable current rating (550 mA), and equivalent DC resistance (1.68 Ohm Max). Operating temperature range is -55°C to 125°C. Drum core, wirewound construction with ferrite core material.

Parameter Comparison

Engineering Selection Recommendations

SRR1260A-102K Selection Criteria:

The SRR1260A-102K from Bourns Inc. qualifies as a direct substitute when the application permits a reduced operating temperature ceiling of 125°C (versus 165°C for the DRA125-102-R). This part offers superior inductance tolerance (±10% versus ±20%), higher current rating capacity (680 mA versus 552 mA), and maintains AEC-Q200 qualification. The ferrite drum core construction and equivalent DC resistance (1.7 Ohm Max) ensure functional compatibility. Tape & Reel packaging provides alternative supply chain options.

B82477G4105M000 Selection Criteria:

The B82477G4105M000 from EPCOS - TDK Electronics serves as a similar substitute when the application requires extended low-temperature operation (-55°C minimum versus -40°C). This part maintains matching inductance tolerance (±20%), comparable current rating (550 mA), and equivalent DC resistance (1.68 Ohm Max). The absence of stated AEC-Q200 rating requires verification against specific automotive or industrial qualification requirements. Package footprint is slightly larger (12.80 x 12.80 mm) and seated height is greater (8.00 mm), necessitating PCB layout confirmation.

Selection Logic:

• Use SRR1260A-102K when operating temperature does not exceed 125°C and tighter inductance tolerance is beneficial
• Use B82477G4105M000 when extended low-temperature performance (-55°C) is required and AEC-Q200 qualification is not mandatory
• Retain DRA125-102-R when operating temperature range of -40°C to 165°C is required or when AEC-Q200 qualification is mandatory

All three parts maintain ROHS3 compliance, shielded configuration, and surface mount compatibility.

Frequently Asked Questions (FAQ)

Q: Can SRR1260A-102K replace DRA125-102-R in all applications?

A: SRR1260A-102K is functionally compatible when the circuit operates within -40°C to 125°C. Applications requiring operation above 125°C must use DRA125-102-R or verify thermal performance limits for the specific circuit design.

Q: What is the impact of different DC resistance values (1.78 Ohm vs. 1.7 Ohm vs. 1.68 Ohm)?

A: DC resistance differences of 0.10 Ohm or less produce negligible impact on circuit performance in most applications. Power dissipation calculations should be verified for high-current or precision applications where resistive losses are critical.

Q: Are the package dimensions interchangeable between all three parts?

A: DRA125-102-R and SRR1260A-102K share identical footprints (12.50 x 12.50 mm) and are directly interchangeable on PCB layouts. B82477G4105M000 has a slightly larger footprint (12.80 x 12.80 mm) and greater height (8.00 mm versus 6.00 mm), requiring PCB layout verification before substitution.

Q: What does AEC-Q200 qualification mean?

A: AEC-Q200 is an automotive electronics qualification standard. DRA125-102-R and SRR1260A-102K carry this certification, indicating suitability for automotive applications. B82477G4105M000 does not list this rating; applications requiring automotive qualification should confirm alternative compliance documentation.

Q: How do saturation current ratings affect substitution?

A: Saturation current (Isat) indicates the current level at which inductance begins to degrade. DRA125-102-R (695 mA Isat) and B82477G4105M000 (650 mA Isat) provide higher saturation margins than SRR1260A-102K (600 mA Isat). For applications operating near maximum current ratings, saturation performance should be evaluated against circuit requirements.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging is suitable for lower-volume orders and manual assembly. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly and higher-volume production. Both formats contain identical components; packaging selection depends on manufacturing process requirements.