1206HS-390EJTS Equivalent & Substitute Parts

Part Overview

The 1206HS-390EJTS is a 39 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, designed for surface mount applications in the 1206 (3216 Metric) package. This component is rated for 1 A continuous current with a DC resistance of 120 mOhm and operates across the temperature range of -40°C to 125°C.

The 1206HS-390EJTS is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor specification.

Substiute Parts

1206HS-390EJTS

Delta Electronics/ComponentsIn Stock: 10831206HS-390EJTS Datasheet

Current PartRFQ

LQW31HN39NJ03L

Murata ElectronicsIn Stock: 4696LQW31HN39NJ03L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1206HS-390EJTS is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 39 nH (±5% tolerance)
• Package / Case: 1206 (3216 Metric) surface mount form factor
• Shielding configuration: Unshielded
• Mounting type: Surface mount

Allowable Variation Parameters:

• Current rating: Substitute must support minimum 1 A continuous current; higher ratings are acceptable
• DC resistance: Substitute DCR must not exceed the application's thermal and loss requirements; lower DCR values are acceptable
• Operating temperature range: Substitute must cover the required operating window; extended ranges are acceptable
• Frequency characteristics: Q factor and self-resonant frequency may vary within acceptable application limits

The substitute part LQW31HN39NJ03L from Murata Electronics meets the critical matching parameters of inductance value, package form factor, and unshielded configuration. However, the current rating of 490 mA is lower than the 1 A specification of the main part, requiring application-level verification of current requirements.

Parameter Comparison

Engineering Selection Recommendations

1206HS-390EJTS (Delta Electronics/Components):

• Status: Obsolete
• Compliance: ROHS3 compliant, REACH unaffected
• Suitable for applications requiring 1 A continuous current capacity and extended operating temperature range to 125°C
• Higher DC resistance (120 mOhm) results in greater power dissipation compared to the substitute

LQW31HN39NJ03L (Murata Electronics):

• Status: Obsolete
• Compliance: ROHS3 compliant, REACH unaffected
• Suitable for applications with current requirements up to 490 mA
• Lower DC resistance (67 mOhm Max) provides reduced power dissipation and improved efficiency
• Operating temperature range limited to -40°C to 85°C; not suitable for applications requiring operation above 85°C
• Higher Q factor (60 @ 436 MHz) indicates better performance at higher frequencies

Selection between these parts depends on application-specific current requirements and operating temperature constraints. The Murata LQW31HN39NJ03L is suitable only for applications where continuous current does not exceed 490 mA and maximum operating temperature does not exceed 85°C.

Frequently Asked Questions (FAQ)

Q: Can the LQW31HN39NJ03L replace the 1206HS-390EJTS in all applications?

A: No. The LQW31HN39NJ03L has a maximum current rating of 490 mA, compared to the 1 A rating of the 1206HS-390EJTS. Substitution is valid only for applications where the actual operating current does not exceed 490 mA. Additionally, the operating temperature range of the Murata part is limited to -40°C to 85°C, making it unsuitable for applications requiring operation above 85°C.

Q: What are the physical differences between these parts?

A: Both parts use the 1206 (3216 Metric) package. The 1206HS-390EJTS has dimensions of 0.140" L x 0.085" W (3.56mm x 2.16mm) with a maximum seated height of 0.060" (1.52mm). The LQW31HN39NJ03L has dimensions of 0.126" L x 0.063" W (3.20mm x 1.60mm) with a maximum seated height of 0.079" (2.00mm). These dimensional differences may affect PCB layout and component placement.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1206HS-390EJTS and LQW31HN39NJ03L are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the lower DC resistance in the Murata part?

A: The LQW31HN39NJ03L has a DC resistance of 67 mOhm Max compared to 120 mOhm for the Delta part. Lower DC resistance results in reduced power dissipation (I²R losses) and improved thermal performance. This is advantageous in high-frequency or high-current applications, provided the current rating of 490 mA is not exceeded.

Q: Can I use the 1206HS-390EJTS as a substitute for the LQW31HN39NJ03L?

A: Yes, the 1206HS-390EJTS can substitute for the LQW31HN39NJ03L in applications where the higher current rating (1 A vs. 490 mA) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) are beneficial or neutral. However, the higher DC resistance may result in increased power dissipation.

Q: What is the inductance tolerance for both parts?

A: Both parts have an inductance tolerance of ±5%, ensuring consistent performance across the specified tolerance band of 37.05 nH to 40.95 nH.