DRA125-680-R Equivalent & Substitute Parts

Part Overview

The DRA125-680-R is a 68 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 2.125 A continuous current with a DC resistance of 120mOhm 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. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and supply chain continuity.

Substiute Parts

DRA125-680-R

Eaton - Electronics DivisionIn Stock: 1326DRA125-680-R Datasheet

Current PartRFQ

SRR1260A-680M

Bourns Inc.In Stock: 3450SRR1260A-680M Datasheet

DirectRFQ

B82477G4683M000

EPCOS - TDK ElectronicsIn Stock: 1349B82477G4683M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DRA125-680-R are qualified based on the following critical parameters:

Primary Substitution Criteria:

• Inductance value: 68 µH (±20% tolerance maintained across all parts)
• Current rating: Minimum 2.1 A (substitute parts rated at 2.1 A meet or approach the 2.125 A requirement)
• DC resistance: Maximum 120mOhm (substitute parts at 110mOhm or 120mOhm are acceptable)
• Shielding: Shielded construction required
• Mounting: Surface mount, nonstandard package
• Compliance: AEC-Q200 qualification and ROHS3 compliance

Substitute Parts Identified:

1. SRR1260A-680M (Bourns Inc.) — Direct equivalent with drum core ferrite construction, 2.1 A rating, 110mOhm DCR, and AEC-Q200 qualification. Operating temperature range -40°C to 125°C.

2. B82477G4683M000 (EPCOS - TDK Electronics) — Similar specification with drum core ferrite construction, 2.1 A rating, 120mOhm DCR. Operating temperature range -55°C to 125°C. Dimensions vary slightly (12.80 x 12.80 mm, 8.00 mm height).

Parameter Comparison

Engineering Selection Recommendations

DRA125-680-R (Primary Part): The DRA125-680-R remains the optimal choice for applications requiring the full operating temperature range of -40°C to 165°C. This part carries AEC-Q200 qualification and is actively manufactured by Eaton. Current inventory of 1282 pieces supports immediate availability.

SRR1260A-680M (Bourns Inc.) — Direct Substitute: This part is suitable for applications where the operating temperature range can be limited to -40°C to 125°C. The SRR1260A-680M offers identical inductance, matching package footprint (12.50 x 12.50 mm), and lower DC resistance (110mOhm vs. 120mOhm). AEC-Q200 qualification and ROHS3 compliance are maintained. Inventory of 3417 pieces provides strong supply availability. Height difference of 0.50 mm (6.50 mm vs. 6.00 mm) must be evaluated for PCB clearance constraints.

B82477G4683M000 (EPCOS - TDK Electronics) — Similar Substitute: This part is applicable for applications with extended low-temperature operation (-55°C minimum) where the upper temperature limit of 125°C is acceptable. The part maintains 68 µH inductance and 120mOhm DCR matching the primary part. ROHS3 compliance is confirmed. Physical dimensions differ: 12.80 x 12.80 mm footprint and 8.00 mm height require PCB layout verification. AEC-Q200 qualification is not specified for this part. Inventory of 1244 pieces supports availability.

Frequently Asked Questions (FAQ)

Q1: Can SRR1260A-680M be used as a direct replacement for DRA125-680-R in all applications?

A: The SRR1260A-680M is functionally equivalent for inductance, current rating, and DC resistance. However, the operating temperature range differs: SRR1260A-680M operates to 125°C maximum, while DRA125-680-R operates to 165°C. Applications requiring sustained operation above 125°C must use the DRA125-680-R. Additionally, the seated height increases from 6.00 mm to 6.50 mm, requiring PCB clearance verification.

Q2: What are the key differences between the two substitute parts?

A: SRR1260A-680M (Bourns) offers lower DC resistance (110mOhm vs. 120mOhm) and maintains the identical 12.50 x 12.50 mm footprint. B82477G4683M000 (EPCOS - TDK) provides extended low-temperature operation (-55°C) but has a larger footprint (12.80 x 12.80 mm) and greater height (8.00 mm). Both substitute parts are rated at 2.1 A, slightly below the primary part's 2.125 A rating.

Q3: Are all three parts ROHS3 compliant?

A: Yes, all three parts carry ROHS3 compliance certification. This ensures compatibility with environmental and regulatory requirements across automotive and industrial applications.

Q4: Which substitute part has AEC-Q200 qualification?

A: Both the primary part (DRA125-680-R) and SRR1260A-680M carry AEC-Q200 qualification. B82477G4683M000 does not list AEC-Q200 qualification in the provided specifications.

Q5: What is the impact of DC resistance differences on circuit performance?

A: The primary part specifies 120mOhm DCR. SRR1260A-680M offers 110mOhm maximum, representing a 10mOhm reduction. B82477G4683M000 matches the 120mOhm specification. Lower DCR reduces resistive losses and heat generation. Circuit designs with tight thermal or efficiency margins should account for this 8.3% reduction when substituting with the Bourns part.

Q6: Can B82477G4683M000 be used in space-constrained PCB layouts?

A: No. The B82477G4683M000 has a larger footprint (12.80 x 12.80 mm vs. 12.50 x 12.50 mm) and greater height (8.00 mm vs. 6.00 mm). PCB layouts designed for the DRA125-680-R footprint require redesign to accommodate this part. The SRR1260A-680M maintains the identical footprint and is preferred for space-constrained applications.

Q7: What saturation current considerations apply to substitution?

A: The primary part (DRA125-680-R) has Isat of 2.635 A. SRR1260A-680M has Isat of 2.1 A, matching its current rating. B82477G4683M000 has Isat of 2.45 A. Applications with transient current spikes approaching or exceeding 2.1 A should use the primary part or B82477G4683M000 to maintain saturation margin.