ILSB0603ER1R2K Equivalent & Substitute Parts

Part Overview

The ILSB0603ER1R2K is a 1.2 µH shielded multilayer ferrite inductor manufactured by Vishay Dale, designed for surface mount applications in the 0603 (1608 Metric) package. This component operates across a temperature range of -55°C to 125°C with a maximum DC resistance of 800mOhm and supports a 25 mA current rating. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements permit tolerance of variations in electrical performance parameters such as current rating, DC resistance, or self-resonant frequency while maintaining the same inductance value, package footprint, and core material specifications.

Substiute Parts

ILSB0603ER1R2K

Vishay DaleIn Stock: 4244ILSB0603ER1R2K Datasheet

Current PartRFQ

CS160808-1R2K

Bourns Inc.In Stock: 4687CS160808-1R2K Datasheet

MFR RecommendedRFQ

LQM18NN1R2K00D

Murata ElectronicsIn Stock: 3343LQM18NN1R2K00D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ILSB0603ER1R2K are identified based on the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Inductance: 1.2 µH
• Tolerance: ±10%
• Package / Case: 0603 (1608 Metric)
• Material - Core: Ferrite
• Shielding: Shielded
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Variable Parameters (Allowed to Differ):

• Current Rating (Amps)
• DC Resistance (DCR)
• Q @ Freq
• Frequency - Self Resonant
• Operating Temperature Range
• Height - Seated (Max)

The identified substitutes maintain identical inductance, package, and core specifications while offering different electrical performance characteristics. Selection depends on circuit requirements for current handling capacity and DC resistance tolerance.

Parameter Comparison

Engineering Selection Recommendations

CS160808-1R2K (Bourns Inc.): This substitute offers a higher current rating of 100 mA compared to the 25 mA rating of the ILSB0603ER1R2K, with improved DC resistance of 600mOhm Max. The higher Q factor of 50 @ 10MHz provides better performance in RF applications. Both parts share identical operating temperature range (-55°C ~ 125°C) and RoHS3 compliance. Selection of this substitute is appropriate when circuit design permits the use of a higher current-rated component with lower DC resistance.

LQM18NN1R2K00D (Murata Electronics): This substitute maintains identical current rating (25 mA) and DC resistance (800mOhm Max) specifications as the ILSB0603ER1R2K. The operating temperature range is narrower (-40°C ~ 85°C) compared to the original part. Both components are ROHS3 compliant. Selection of this substitute is appropriate for applications where the narrower temperature range is acceptable and Murata sourcing is preferred.

Frequently Asked Questions (FAQ)

Q: Can the CS160808-1R2K be used as a direct replacement for the ILSB0603ER1R2K?

A: The CS160808-1R2K shares the same inductance value, package, core material, and shielding. The primary differences are higher current rating (100 mA vs. 25 mA), lower DC resistance (600mOhm vs. 800mOhm), and higher Q factor. Direct substitution is possible if the circuit design accommodates these electrical differences and does not require the extended low-temperature operation below -40°C.

Q: What is the impact of different DC resistance values between substitutes?

A: DC resistance affects power dissipation and insertion loss in the inductor. The CS160808-1R2K with 600mOhm Max DCR dissipates less power than the ILSB0603ER1R2K and LQM18NN1R2K00D at 800mOhm Max. Selection depends on circuit power budget and thermal management requirements.

Q: Are all three parts physically compatible with the same PCB footprint?

A: All three parts use the 0603 (1608 Metric) package with identical length and width dimensions (0.063" L x 0.031" W / 1.60mm x 0.80mm). Height differences are minimal (0.039" vs. 0.037" / 1.00mm vs. 0.95mm), presenting no practical PCB layout constraints.

Q: What is the significance of self-resonant frequency differences?

A: Self-resonant frequency indicates the frequency at which the inductor transitions from inductive to capacitive behavior. The ILSB0603ER1R2K operates at 74MHz, while substitutes operate at 60MHz (Bourns) and 65MHz (Murata). Selection depends on the operating frequency range of the application to ensure the inductor remains inductive throughout the intended frequency band.

Q: Does operating temperature range affect substitute selection?

A: The LQM18NN1R2K00D has a narrower operating range (-40°C ~ 85°C) compared to the ILSB0603ER1R2K and CS160808-1R2K (-55°C ~ 125°C). Applications requiring extended low-temperature operation below -40°C or high-temperature operation above 85°C must use the Vishay Dale or Bourns alternatives.