Bourns 6711 50µH Toroidal Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 6711 is a 50µH shielded toroidal inductor rated for 9.5A continuous current with 12mOhm maximum DC resistance. This through-hole component features an iron powder core and operates across the -55°C to 105°C temperature range. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications requiring this inductance value and current rating.

Substiute Parts

6711

Bourns Inc.In Stock: 21276711 Datasheet

Current PartRFQ

PT50-1320

API Delevan Inc.In Stock: 812PT50-1320 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 6711 is determined by the following critical parameters:

• Inductance Value: Must be 50µH with ±15% tolerance
• Current Rating: Minimum 9.5A continuous current capability
• DC Resistance: Maximum 12mOhm to maintain circuit performance
• Core Type: Iron powder construction for equivalent magnetic characteristics
• Shielding: Shielded configuration to prevent electromagnetic interference
• Mounting: Through-hole radial/vertical orientation for PCB compatibility
• Test Frequency: 1 kHz measurement standard

The API Delevan PT50-1320 meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The API Delevan PT50-1320 is a direct functional substitute for the obsolete Bourns 6711. The PT50-1320 maintains identical inductance and tolerance specifications while providing superior current handling (11A versus 9.5A). The increased DC resistance of 20mOhm versus 12mOhm represents a trade-off that remains acceptable for most applications within the specified current range.

Both components share identical regulatory classifications (EAR99, REACH Unaffected, RoHS non-compliant) and core material composition. The PT50-1320 is currently in active production status, ensuring long-term availability and supply chain continuity.

Physical dimensions differ slightly: the PT50-1320 measures 1.320" diameter by 0.630" width compared to the Bourns 6711 at 1.250" length by 0.800" width. PCB layout verification is required to confirm mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can the API Delevan PT50-1320 replace the Bourns 6711 in existing designs?

A: Yes. Both components provide 50µH inductance at ±15% tolerance with shielded iron powder cores. The PT50-1320 offers higher current rating (11A vs 9.5A) and operates within the same 1 kHz test frequency standard. Physical dimensions require verification for PCB compatibility.

Q: What is the impact of the higher DC resistance in the PT50-1320?

A: The PT50-1320 specifies 20mOhm maximum DC resistance compared to 12mOhm for the Bourns 6711. This 8mOhm difference increases resistive losses proportionally to current squared. For 9.5A operation, this represents approximately 0.72mW additional power dissipation. Circuit thermal analysis should confirm acceptability for the specific application.

Q: Are there operating temperature differences between these parts?

A: The Bourns 6711 specifies -55°C to 105°C operating range. The API Delevan PT50-1320 does not provide explicit operating temperature limits in the available data. Applications requiring confirmed temperature specifications should contact the manufacturer directly.

Q: What are the packaging and lead configuration differences?

A: Both components use through-hole radial/vertical mounting with open lead configurations. The Bourns 6711 specifies 4 leads while the PT50-1320 specifies open configuration. Physical footprint dimensions differ and require PCB layout verification before substitution.

Q: Are both parts compliant with current regulatory requirements?

A: Both components are RoHS non-compliant and REACH Unaffected with EAR99 export classification. Applications requiring RoHS compliance cannot use either component without alternative part selection.