Equivalent & Substitute Parts for 29L684C

Part Overview

The 29L684C is a 680 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 200 mA with a maximum DC resistance of 3.61Ohm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part features surface mount technology with nonstandard corner terminals and operates across the temperature range of -40°C to 85°C.

Substiute Parts

29L684C

Murata Power Solutions Inc.In Stock: 82529L684C Datasheet

Current PartRFQ

PA4301.684NLT

Pulse ElectronicsIn Stock: 701PA4301.684NLT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 29L684C is determined by strict alignment of the following electrical and mechanical parameters:

• Inductance Value: 680 µH (exact match required)
• Current Rating: Minimum 200 mA (substitute must support or exceed this value)
• DC Resistance: Maximum 3.61Ohm (substitute must not exceed this specification)
• Shielding: Shielded construction (electromagnetic containment requirement)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Physical Footprint: 7.20mm x 7.20mm base dimensions (board layout constraint)
• Height Constraint: Maximum 3.15mm seated height (clearance requirement)
• Environmental Compliance: RoHS and REACH compliance status

The PA4301.684NLT from Pulse Electronics meets these substitution criteria and is designated as the manufacturer-recommended alternative.

Parameter Comparison

Engineering Selection Recommendations

The PA4301.684NLT qualifies as a direct substitute based on the following factors:

Electrical Compatibility: Both parts maintain the 680 µH inductance specification. The PA4301.684NLT exhibits lower DC resistance (4.61Ohm vs. 3.61Ohm maximum), which is advantageous for thermal performance. The current rating of 193 mA on the substitute is marginally lower than the 200 mA specification of the original part; this difference must be evaluated against actual circuit current requirements.

Physical Compatibility: Identical footprint dimensions (7.20mm x 7.20mm) and reduced seated height (3.00mm vs. 3.15mm) ensure PCB layout compatibility without redesign.

Regulatory Compliance: The PA4301.684NLT carries ROHS3 Compliant status, exceeding the RoHS Compliant designation of the 29L684C. Both parts maintain REACH Unaffected status and MSL 1 rating.

Operational Range: The substitute supports an extended operating temperature range (-40°C to 125°C) compared to the original (-40°C to 85°C), providing additional thermal margin for applications operating at elevated temperatures.

Product Status: The 29L684C is obsolete; the PA4301.684NLT is active production, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the PA4301.684NLT be used as a direct replacement for the 29L684C?

A: The PA4301.684NLT meets the core electrical and mechanical substitution criteria: identical inductance (680 µH), shielded construction, matching footprint (7.20mm x 7.20mm), and surface mount configuration. The current rating difference (193 mA vs. 200 mA) requires circuit-level evaluation to confirm the substitute operates within design margins.

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

A: The 29L684C is rated for 200 mA; the PA4301.684NLT is rated for 193 mA. This 7 mA difference represents a 4.6% reduction in maximum current capacity. Applications operating at or near 200 mA must be reassessed to ensure the substitute does not exceed saturation conditions.

Q: Are there physical clearance concerns when substituting the PA4301.684NLT?

A: No. The PA4301.684NLT has a reduced seated height (3.00mm vs. 3.15mm), providing additional clearance margin. The footprint dimensions are identical, requiring no PCB layout modifications.

Q: Does the extended operating temperature range of the PA4301.684NLT affect compatibility?

A: The PA4301.684NLT supports -40°C to 125°C operation, compared to -40°C to 85°C for the 29L684C. This extended range is compatible with all applications designed for the original part and provides additional thermal headroom for high-temperature environments.

Q: What compliance advantages does the PA4301.684NLT offer?

A: The PA4301.684NLT carries ROHS3 Compliant certification, representing current regulatory standards. Both parts maintain REACH Unaffected status and MSL 1 (unlimited moisture sensitivity) ratings, ensuring equivalent environmental compliance.

Q: Is the PA4301.684NLT available in the same packaging format?

A: The PA4301.684NLT is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The 29L684C packaging format is not specified in available data. Both parts use nonstandard package configurations compatible with standard surface mount equipment.