CW252016-R39J Equivalent & Substitute Parts

Part Overview

The CW252016-R39J is a 390 nH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 400 mA continuous current with a maximum DC resistance of 1.12Ohm. This component is designed for surface mount applications in the 1008 (2520 Metric) package format and operates across the industrial temperature range of -40°C to 125°C. The part maintains active product status and carries ROHS3 compliance certification.

Equivalent and substitute parts are identified when design requirements permit flexibility in current rating, DC resistance tolerance, or core material composition while maintaining the critical electrical specifications of 390 nH inductance at ±5% tolerance and 25 MHz test frequency.

Substiute Parts

CW252016-R39J

Bourns Inc.In Stock: 1342CW252016-R39J Datasheet

Current PartRFQ

744762239A

Würth ElektronikIn Stock: 58314744762239A Datasheet

SimilarRFQ

LQW2UASR39J00L

Murata ElectronicsIn Stock: 2125LQW2UASR39J00L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CW252016-R39J is determined by the following criteria:

Critical Parameters (Must Match):

• Inductance value: 390 nH
• Inductance tolerance: ±5%
• Package / Case: 1008 (2520 Metric)
• Mounting type: Surface Mount
• Shielding configuration: Unshielded
• Test frequency: 25 MHz

Flexible Parameters (Allowable Variation):

• Current rating: Substitute parts may exceed the 400 mA specification
• DC resistance: Substitute parts may have lower maximum DC resistance values
• Core material: Ceramic or air core compositions are acceptable
• Self resonant frequency: Minor variations permitted within the 500 MHz range
• Operating temperature: Extended ranges are acceptable

Two substitute parts meet these criteria: the Würth Elektronik 744762239A and the Murata Electronics LQW2UASR39J00L. Both maintain the 390 nH inductance specification, ±5% tolerance, 1008 package format, and unshielded configuration while offering improved current handling or reduced DC resistance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Würth Elektronik 744762239A: This substitute provides a 17.5% increase in current rating (470 mA versus 400 mA) and a 5.4% reduction in maximum DC resistance (1.06Ohm versus 1.12Ohm). The ceramic drum core construction maintains electromagnetic characteristics consistent with the original design. AEC-Q200 automotive qualification is available for this part, providing additional reliability documentation for applications requiring automotive-grade components. Physical dimensions are marginally larger (2.60mm x 2.10mm versus 2.50mm x 2.00mm), requiring verification of PCB layout constraints.

Murata Electronics LQW2UASR39J00L: This substitute maintains identical DC resistance (1.12Ohm maximum) and current rating (470 mA), providing a 17.5% increase over the original specification. The air core construction differs from the ceramic drum core of the original part. Extended operating temperature range (-55°C to 125°C) accommodates wider environmental specifications. Physical dimensions are slightly larger (2.62mm x 2.45mm), requiring PCB layout verification. Self resonant frequency remains at 500 MHz, matching the original specification.

Both substitutes maintain ROHS3 compliance, MSL Level 1 rating, and active product status. Selection between substitutes depends on core material preference, current margin requirements, and physical space availability on the PCB.

Frequently Asked Questions (FAQ)

Q: Can the CW252016-R39J be replaced with the Würth Elektronik 744762239A?

A: Yes. Both parts maintain 390 nH inductance at ±5% tolerance, identical Q factor at 100MHz, and the same 1008 package format. The Würth part offers higher current rating (470 mA versus 400 mA) and lower DC resistance (1.06Ohm versus 1.12Ohm). Physical dimensions differ slightly; PCB layout must accommodate 2.60mm x 2.10mm footprint versus 2.50mm x 2.00mm.

Q: Can the CW252016-R39J be replaced with the Murata Electronics LQW2UASR39J00L?

A: Yes. Both parts maintain 390 nH inductance at ±5% tolerance, identical Q factor at 100MHz, and the same 1008 package format. The Murata part offers higher current rating (470 mA versus 400 mA) with identical DC resistance (1.12Ohm). Core material differs (air core versus ceramic drum core). Physical dimensions differ slightly; PCB layout must accommodate 2.62mm x 2.45mm footprint versus 2.50mm x 2.00mm.

Q: What are the critical parameters that must match for substitution?

A: Inductance (390 nH), inductance tolerance (±5%), package format (1008 / 2520 Metric), mounting type (Surface Mount), and shielding configuration (Unshielded) must remain constant. Test frequency (25 MHz) and Q factor at 100MHz (45) define the electrical performance baseline.

Q: Are there differences in core material between these parts?

A: Yes. The CW252016-R39J and 744762239A use ceramic drum core construction. The LQW2UASR39J00L uses air core construction. Both core types achieve the specified 390 nH inductance and 45 Q factor at 100MHz. Core material selection affects electromagnetic field distribution and may influence performance in specific circuit topologies; circuit-level analysis is required for applications sensitive to core material composition.

Q: Do all three parts have identical operating temperature ranges?

A: No. The CW252016-R39J and 744762239A operate from -40°C to 125°C. The LQW2UASR39J00L operates from -55°C to 125°C, providing extended low-temperature capability. Applications requiring operation below -40°C must use the Murata part.

Q: What compliance certifications apply to these parts?

A: All three parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. The Würth Elektronik 744762239A includes AEC-Q200 automotive qualification. The CW252016-R39J and LQW2UASR39J00L do not list automotive qualification in the provided specifications.

Q: Are there physical size constraints to consider?

A: Yes. The CW252016-R39J measures 2.50mm x 2.00mm x 1.80mm (height). The 744762239A measures 2.60mm x 2.10mm x 1.90mm. The LQW2UASR39J00L measures 2.62mm x 2.45mm x 2.03mm. PCB layout and component placement must accommodate these dimensional variations.