DR124-681-R Equivalent & Substitute Parts Reference

Part Overview

The DR124-681-R is a 680 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 560 mA continuous current with a maximum DC resistance of 2.215 Ohm and operates across the temperature range of -40°C to 125°C. The part is Active in product status and RoHS3 compliant, making it suitable for modern electronic applications requiring regulated inductance values in compact form factors.

Equivalent and substitute parts are identified when alternative components meet the same electrical specifications and mechanical constraints, enabling design flexibility, supply chain optimization, and component availability management.

Substiute Parts

DR124-681-R

Eaton - Electronics DivisionIn Stock: 1181DR124-681-R Datasheet

Current PartRFQ

P1168.684NLT

Pulse ElectronicsIn Stock: 3670P1168.684NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DR124-681-R is determined by the following critical parameters:

Primary Electrical Criteria:

• Inductance value: 680 µH (within ±20% tolerance band)
• Current rating: minimum 560 mA continuous
• Saturation current: minimum 650 mA
• DC resistance: maximum 2.215 Ohm

Secondary Electrical Criteria:

• Shielding: Shielded configuration required
• Operating temperature range: minimum -40°C to 125°C coverage
• Inductance test frequency: 100 kHz

Mechanical Criteria:

• Mounting type: Surface Mount
• Package form factor: Nonstandard, compatible with 12.50 mm × 12.50 mm footprint
• Height constraint: maximum 4.50 mm seated height

Compliance Criteria:

• RoHS3 compliance required
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The substitute part P1168.684NLT meets the inductance, tolerance, shielding, mounting, and compliance requirements. However, the substitute exhibits lower current rating (500 mA) and saturation current (500 mA) compared to the main part, along with reduced DC resistance (1.824 Ohm Max) and slightly higher operating temperature ceiling (130°C).

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (DR124-681-R): The DR124-681-R is the specified component and remains the first choice for applications requiring the full 560 mA current rating and 650 mA saturation current. This part is Active in product status, RoHS3 compliant, and available in quantity (1115 pcs in stock). Selection is appropriate for designs operating at or near the maximum current specifications.

Substitute Part Selection (P1168.684NLT): The P1168.684NLT from Pulse Electronics is suitable as a substitute only in applications where the continuous current requirement does not exceed 500 mA and saturation current does not exceed 500 mA. The substitute offers advantages in lower DC resistance (1.824 Ohm vs. 2.215 Ohm), extended upper operating temperature (130°C vs. 125°C), and higher inventory availability (3638 pcs in stock). The substitute is Active in product status and RoHS3 compliant. Slightly smaller package dimensions (12.24 × 12.24 mm vs. 12.50 × 12.50 mm) may provide minor layout benefits but do not affect functional compatibility.

Compliance Basis: Both parts satisfy RoHS3 requirements and MSL 1 moisture sensitivity classification, supporting use in standard manufacturing and storage environments without special handling.

Frequently Asked Questions (FAQ)

Q: Can P1168.684NLT replace DR124-681-R in all applications?

A: No. The substitute part is rated for 500 mA continuous current and 500 mA saturation current, compared to the main part's 560 mA and 650 mA ratings. Substitution is valid only when the application's maximum current requirement does not exceed 500 mA continuous and 500 mA saturation.

Q: What is the impact of the lower DC resistance in the substitute part?

A: The substitute's DC resistance of 1.824 Ohm (maximum) is lower than the main part's 2.215 Ohm (maximum). Lower DC resistance reduces resistive losses and heat generation in the inductor, which is generally favorable for efficiency. This difference does not prevent substitution but should be evaluated in thermal and power budget calculations.

Q: Are the package dimensions compatible?

A: The substitute part measures 12.24 × 12.24 mm compared to the main part's 12.50 × 12.50 mm footprint. Both parts maintain the same 4.50 mm seated height. The slightly smaller substitute footprint is mechanically compatible with layouts designed for the main part, though PCB land patterns should be verified for optimal solder joint formation.

Q: Do both parts meet the same temperature operating range?

A: The main part operates from -40°C to 125°C, while the substitute extends to -40°C to 130°C. Both cover the specified range, with the substitute offering an additional 5°C upper margin. This does not restrict substitution but may provide additional thermal headroom in high-temperature applications.

Q: What is the inductance tolerance for both parts?

A: Both the DR124-681-R and P1168.684NLT are specified with ±20% inductance tolerance at 100 kHz test frequency. This matched tolerance ensures equivalent inductance accuracy in circuit applications.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the DR124-681-R and P1168.684NLT are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, supporting standard manufacturing and storage without special environmental controls.

Q: What is the self-resonant frequency of the substitute part?

A: The P1168.684NLT specifies a self-resonant frequency of 2.1 MHz. This parameter is not provided for the main part. The substitute's self-resonant frequency should be evaluated in applications where high-frequency performance or impedance characteristics are critical design factors.