DR124-820-R Equivalent & Substitute Parts Reference

Part Overview

The DR124-820-R is a 82 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 actively produced and widely available in inventory (846 pieces in stock). Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements where alternative specifications may be acceptable within defined electrical and mechanical parameters.

Substiute Parts

DR124-820-R

Eaton - Electronics DivisionIn Stock: 856DR124-820-R Datasheet

Current PartRFQ

SRR1240-820M

Bourns Inc.In Stock: 2747SRR1240-820M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DR124-820-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 82 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Core type: Ferrite drum core, shielded construction
• Mounting: Surface mount, nonstandard package
• Physical dimensions: 12.50mm x 12.50mm footprint with 4.50mm maximum seated height

Secondary Compatibility Factors:

• Current rating: Substitute must support minimum 1.35 A (acceptable for most applications requiring ≤1.7 A rating)
• DC resistance: Substitute DCR ≤255.3 mOhm (lower DCR acceptable; higher DCR requires application verification)
• Operating temperature: -40°C to 125°C range (matching specification)
• Compliance: ROHS3 and REACH status alignment

The SRR1240-820M from Bourns Inc. meets all primary matching criteria and is classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

DR124-820-R (Eaton - Electronics Division)

Select this part when:

• Maximum current rating of 1.7 A is required
• Saturation current specification of 1.94 A is critical to application performance
• Eaton component qualification or supply chain preference is specified
• Active inventory availability is prioritized (846 pieces in stock)

SRR1240-820M (Bourns Inc.)

Select this part when:

• Application current requirement does not exceed 1.35 A
• Lower DC resistance (250 mOhm vs. 255.3 mOhm) provides performance advantage
• Bourns component qualification or supply chain preference is specified
• Higher inventory availability is advantageous (2723 pieces in stock)
• Self-resonant frequency specification (10 MHz) or Q factor data (16 @ 2.52MHz) is required for circuit design

Both parts maintain ROHS3 compliance, REACH unaffected status, and identical physical footprints suitable for direct PCB layout substitution.

Frequently Asked Questions (FAQ)

Q: Can SRR1240-820M replace DR124-820-R in all applications?

A: The SRR1240-820M is a direct substitute for applications where the circuit current requirement does not exceed 1.35 A. The lower current rating and saturation current (1.35 A vs. 1.94 A) must be verified against actual circuit operating conditions. Both parts share identical inductance, tolerance, physical dimensions, and operating temperature range.

Q: What is the difference in DC resistance between these parts?

A: The SRR1240-820M has a maximum DC resistance of 250 mOhm, compared to 255.3 mOhm for the DR124-820-R. The lower resistance in the Bourns part may reduce power dissipation in applications with continuous current flow. This difference is within typical manufacturing tolerances for this component class.

Q: Are the physical packages identical?

A: Yes. Both the DR124-820-R and SRR1240-820M share identical surface mount package dimensions of 12.50mm x 12.50mm with a maximum seated height of 4.50mm. Direct PCB layout substitution is possible without redesign.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.4000. Moisture sensitivity level is 1 (unlimited) for both components, indicating no special moisture handling requirements during storage or assembly.

Q: Does the SRR1240-820M provide additional technical data?

A: The SRR1240-820M includes self-resonant frequency specification (10 MHz) and Q factor data (16 @ 2.52MHz), which are not provided for the DR124-820-R. These parameters may be useful for high-frequency circuit analysis or EMI filtering applications.

Q: What inventory considerations should guide part selection?

A: The SRR1240-820M has significantly higher inventory availability (2723 pieces vs. 846 pieces for the DR124-820-R). For applications with flexible sourcing requirements and current ratings ≤1.35 A, the Bourns part may offer supply chain advantages.