Hammond Manufacturing 1530B686 Equivalent & Substitute Parts

Part Overview

The Hammond Manufacturing 1530B686 is a 6.8 µH unshielded drum core wirewound inductor rated for 566 mA with a maximum DC resistance of 624mOhm. This through-hole axial component features an iron core and operates at a test frequency of 7.9 MHz with a Q factor of 40. The part is currently obsolete, making equivalent substitutes necessary for new designs and production requirements.

Substiute Parts

1530B686

Hammond ManufacturingIn Stock: 9971530B686 Datasheet

Current PartRFQ

B78108S1682K000

EPCOS - TDK ElectronicsIn Stock: 51216B78108S1682K000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1530B686 is determined by the following critical parameters:

• Inductance Value: Must be 6.8 µH with ±10% tolerance
• Current Rating: Substitute must support minimum 566 mA
• DC Resistance: Must not exceed 624mOhm maximum
• Core Type: Unshielded drum core wirewound construction
• Mounting: Through-hole axial configuration
• Frequency Characteristics: Operation in the 7.9 MHz test frequency range

The EPCOS B78108S1682K000 meets these substitution criteria with equivalent inductance, improved current handling (670 mA), and superior DC resistance performance (510mOhm).

Parameter Comparison

Engineering Selection Recommendations

The EPCOS B78108S1682K000 is the qualified substitute for the obsolete Hammond Manufacturing 1530B686. Selection is based on the following engineering factors:

Compliance & Availability: The 1530B686 is obsolete with no ongoing production. The B78108S1682K000 is active and maintains full ROHS3 compliance, ensuring long-term supply chain viability and regulatory alignment.

Electrical Performance: Both parts maintain identical inductance values (6.8 µH) and tolerance specifications (±10%). The substitute provides superior electrical characteristics with 670 mA current rating versus 566 mA, and reduced DC resistance of 510mOhm compared to 624mOhm maximum. The higher Q factor (65 versus 40) indicates improved efficiency at the test frequency.

Physical Compatibility: Both components use through-hole axial mounting. The substitute is slightly larger (0.157" Dia x 0.362" L versus 0.150" Dia x 0.250" L), requiring PCB layout verification for space-constrained applications.

Regulatory Status: Both parts are ROHS3 compliant. The substitute is REACH Affected, requiring compliance verification within your supply chain documentation.

Frequently Asked Questions (FAQ)

Q: Can the B78108S1682K000 directly replace the 1530B686 in existing designs?

A: Electrical substitution is valid based on matching inductance (6.8 µH), tolerance (±10%), and exceeding current and resistance specifications. Physical layout must accommodate the slightly larger dimensions (0.157" Dia x 0.362" L versus 0.150" Dia x 0.250" L).

Q: What is the primary difference between the iron core (1530B686) and ferrite core (B78108S1682K000)?

A: Core material differences affect frequency response and loss characteristics. The ferrite core substitute demonstrates higher Q factor (65 versus 40) at the test frequency, indicating lower losses. Both maintain the same inductance value and unshielded configuration.

Q: Are there any compliance concerns with substitution?

A: Both parts are ROHS3 compliant. The substitute is REACH Affected, requiring verification that your supply chain and end-use applications comply with REACH regulations. The main part is REACH Unaffected.

Q: Does the size difference impact circuit performance?

A: The substitute's larger physical dimensions (0.362" L versus 0.250" L) require PCB layout verification. Electrical performance remains equivalent for the specified application parameters. Mechanical clearance must be confirmed in your assembly design.

Q: What is the current rating difference and does it matter?

A: The substitute supports 670 mA versus the original 566 mA rating. This provides additional design margin and thermal headroom. If your circuit operates at or near 566 mA, the substitute's higher rating improves reliability and reduces thermal stress.