L0805C680MPWST Equivalent & Substitute Parts

Part Overview

The L0805C680MPWST is a 68 µH unshielded drum core wirewound inductor manufactured by KEMET in the 0805 (2012 Metric) surface mount package. This component is rated for 50 mA continuous current with a DC resistance of 6 Ohm and operates across the temperature range of -40°C to 105°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. Substitute components must maintain the same inductance value, package footprint, and core material while accommodating variations in electrical performance parameters within acceptable engineering tolerances.

Substiute Parts

L0805C680MPWST

KEMETIn Stock: 931L0805C680MPWST Datasheet

Current PartRFQ

BRL2012T680M

Taiyo YudenIn Stock: 15550BRL2012T680M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the L0805C680MPWST are identified based on strict equivalence of the following critical parameters:

Primary Matching Criteria:

• Inductance value: 68 µH
• Inductance tolerance: ±20%
• Package / Case: 0805 (2012 Metric)
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Operating temperature range: -40°C to 105°C

Secondary Compatibility Parameters:

• DC resistance within acceptable operational limits
• Current rating sufficient for application requirements
• Self-resonant frequency characteristics
• RoHS3 compliance and MSL rating

Substitute parts must maintain identical package footprint and inductance specifications to ensure direct replacement capability. Variations in DC resistance and current rating are permissible provided the substitute component meets or exceeds the electrical requirements of the application circuit.

Parameter Comparison

Engineering Selection Recommendations

BRL2012T680M (Taiyo Yuden) as Substitute for L0805C680MPWST:

The BRL2012T680M provides functional equivalence to the obsolete L0805C680MPWST across all critical electrical and mechanical parameters. Both components share identical inductance values, tolerance specifications, package footprints, and operating temperature ranges. The substitute component offers superior current handling capability at 110 mA compared to the original 50 mA rating, providing additional design margin for applications requiring higher current capacity.

The DC resistance of the BRL2012T680M is specified at 7.54 Ohm maximum, representing a 1.54 Ohm increase relative to the original 6 Ohm specification. This variance remains within acceptable engineering tolerances for inductor substitution and does not preclude direct replacement in most circuit applications.

Both components maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage protocols. The BRL2012T680M is classified as "Not For New Designs," indicating limited long-term availability; however, current inventory levels support immediate procurement for replacement applications.

The reduced maximum seated height of the BRL2012T680M (1.00 mm versus 1.45 mm) provides improved board-level clearance characteristics and may offer advantages in space-constrained PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the BRL2012T680M directly replace the L0805C680MPWST in existing circuit designs?

A: Yes. Both components share identical inductance values (68 µH), tolerance specifications (±20%), package footprints (0805 / 2012 Metric), core materials (Ferrite), and operating temperature ranges (-40°C to 105°C). The substitute component is electrically and mechanically compatible for direct PCB replacement.

Q: What is the significance of the current rating difference between the two components?

A: The L0805C680MPWST is rated for 50 mA continuous current, while the BRL2012T680M is rated for 110 mA. The higher current rating of the substitute component provides additional design margin and does not restrict its use in applications requiring 50 mA or less. Applications requiring current levels between 50 mA and 110 mA benefit from the enhanced capability of the substitute part.

Q: How does the DC resistance variation affect circuit performance?

A: The BRL2012T680M specifies a maximum DC resistance of 7.54 Ohm compared to the original 6 Ohm specification. This 1.54 Ohm increase results in marginally higher resistive losses in the inductor. For most circuit applications, this variance is negligible; however, designs with strict power dissipation or efficiency requirements should evaluate the impact through circuit simulation or empirical testing.

Q: Are there packaging or handling differences between these components?

A: The BRL2012T680M is supplied in Tape & Reel (TR) packaging, while the original L0805C680MPWST packaging format is not specified in available documentation. Both components maintain MSL Level 1 (Unlimited) moisture sensitivity ratings, indicating identical handling and storage requirements. The reduced seated height of the BRL2012T680M (1.00 mm maximum) may provide improved clearance in compact PCB designs.

Q: What is the difference between the self-resonant frequency values?

A: The L0805C680MPWST exhibits a self-resonant frequency of 10 MHz, while the BRL2012T680M is specified at 6.5 MHz. This difference reflects variations in component construction and parasitic characteristics. For applications operating below these frequency thresholds, the variance has minimal impact. Applications requiring operation near or above 6.5 MHz should evaluate frequency-dependent performance characteristics through impedance analysis.

Q: Are both components compliant with current regulatory standards?

A: Yes. Both the L0805C680MPWST and BRL2012T680M are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.