L1207C680MPWST Equivalent & Substitute Parts

Part Overview

The L1207C680MPWST is a 68 µH unshielded wirewound inductor manufactured by KEMET, designed for surface mount applications in the 1207 (3218 Metric) package. This component is rated for 145 mA continuous current with a DC resistance of 1.49 Ohm and operates across the temperature range of -40°C to 105°C.

The L1207C680MPWST carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

L1207C680MPWST

KEMETIn Stock: 1212L1207C680MPWST Datasheet

Current PartRFQ

LB3218T680K

Taiyo YudenIn Stock: 1950LB3218T680K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L1207C680MPWST is determined by strict equivalence across the following critical parameters:

• Inductance Value: 68 µH (exact match required)
• Current Rating: 145 mA (exact match required)
• DC Resistance: 1.49 Ohm (exact match required)
• Package / Case: 1207 (3218 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)
• Shielding Configuration: Unshielded (exact match required)
• Component Type: Wirewound (exact match required)

The substitute part LB3218T680K meets all critical electrical and mechanical parameters for direct substitution. Tolerance variations and product status differences do not affect functional equivalence within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The LB3218T680K (Taiyo Yuden) is a direct functional equivalent to the L1207C680MPWST (KEMET) for applications requiring a 68 µH unshielded wirewound inductor in the 1207 (3218 Metric) surface mount package.

Both components satisfy identical electrical specifications: 68 µH inductance, 145 mA current rating, and 1.49 Ohm DC resistance. Both operate across the -40°C to 105°C temperature range and maintain equivalent self-resonant frequency and test frequency characteristics.

Compliance certifications are equivalent: both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.8000.

The LB3218T680K carries a tighter inductance tolerance of ±10% compared to the L1207C680MPWST at ±20%, which may provide improved performance consistency in precision applications. The LB3218T680K is classified as Not For New Designs, while the L1207C680MPWST is Obsolete; however, both statuses indicate limited future availability.

Physical dimensions and mounting characteristics are identical, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the LB3218T680K replace the L1207C680MPWST in existing designs?

A: Yes. The LB3218T680K meets all critical electrical and mechanical parameters: identical inductance (68 µH), current rating (145 mA), DC resistance (1.49 Ohm), package (1207/3218 Metric), operating temperature range (-40°C to 105°C), and physical dimensions. Direct substitution is supported without circuit modification.

Q: What is the significance of the tolerance difference between these parts?

A: The L1207C680MPWST specifies ±20% inductance tolerance, while the LB3218T680K specifies ±10%. The tighter tolerance of the LB3218T680K provides greater inductance value consistency. For applications with strict inductance requirements, the LB3218T680K may offer improved performance predictability.

Q: Are there any compliance or regulatory differences between these components?

A: No. Both components are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8504.50.8000) classifications. Regulatory and environmental compliance requirements are equivalent.

Q: What is the difference between the product status designations?

A: The L1207C680MPWST is marked Obsolete, indicating it is no longer manufactured. The LB3218T680K is marked Not For New Designs, indicating limited production for existing applications. Both statuses reflect reduced component availability; however, the LB3218T680K currently maintains higher inventory levels (1850 Pcs vs. 1154 Pcs).

Q: Are the physical dimensions and mounting characteristics identical?

A: Yes. Both components share identical dimensions (0.126" L x 0.071" W / 3.20mm x 1.80mm), maximum seated height (0.079" / 2.00mm), and surface mount configuration. PCB footprints and assembly processes are directly compatible.

Q: What packaging formats are available for these components?

A: The L1207C680MPWST is available in standard packaging. The LB3218T680K is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly operations.