HC5-1R0-R Equivalent & Substitute Parts

Part Overview

The HC5-1R0-R is a 1 µH shielded wirewound inductor manufactured by Eaton - Electronics Division, rated for 21 A continuous current with a maximum DC resistance of 2 mOhm. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across an industrial temperature range of -25°C to 125°C and is suitable for surface mount applications in nonstandard package configurations.

Substiute Parts

HC5-1R0-R

Eaton - Electronics DivisionIn Stock: 770HC5-1R0-R Datasheet

Current PartRFQ

HCF1305-1R0-R

Eaton - Electronics DivisionIn Stock: 5404HCF1305-1R0-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete HC5-1R0-R is evaluated based on strict electrical and mechanical parameter alignment. The primary substitute identified is the HCF1305-1R0-R, which maintains the following critical equivalencies:

Matched Parameters:

• Inductance value: 1 µH (exact match)
• Inductance tolerance: ±20% (exact match)
• Mounting type: Surface Mount (exact match)
• Package dimensions: 12.50 x 12.50 mm footprint (exact match)
• Inductance test frequency: 100 kHz (exact match)
• Current rating: 22 A (exceeds 21 A requirement)
• DC resistance: 1.9 mOhm Max (meets 2 mOhm specification)
• Operating temperature range: -40°C to 125°C (exceeds -25°C to 125°C requirement)

Differing Parameters:

• Shielding: HCF1305-1R0-R is unshielded versus HC5-1R0-R shielded configuration
• Core material: HCF1305-1R0-R uses ferrite drum core versus HC5-1R0-R wirewound construction
• Saturation current: HCF1305-1R0-R rated 24 A versus HC5-1R0-R rated 27 A
• Height: HCF1305-1R0-R seated height 5.00 mm versus HC5-1R0-R 5.30 mm
• Product status: HCF1305-1R0-R is active production versus HC5-1R0-R obsolete
• Packaging: HCF1305-1R0-R supplied in Tape & Reel format

Parameter Comparison

Engineering Selection Recommendations

The HCF1305-1R0-R qualifies as a functional equivalent to the obsolete HC5-1R0-R based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters align within acceptable tolerances. The substitute maintains the 1 µH inductance specification with identical ±20% tolerance. Current handling capability of 22 A exceeds the 21 A requirement of the main part. DC resistance of 1.9 mOhm Max is superior to the 2 mOhm Max specification. The saturation current of 24 A, while lower than the main part's 27 A, remains adequate for continuous operation at the 21 A design current.

Mechanical Compatibility: The footprint dimensions of 12.50 x 12.50 mm are identical, ensuring direct PCB layout compatibility. The seated height difference of 0.30 mm (5.00 mm versus 5.30 mm) is negligible for most applications and may provide improved thermal clearance in constrained layouts.

Regulatory and Compliance Status: The HCF1305-1R0-R is actively manufactured and carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The main part's compliance status is not specified, making the substitute preferable for new designs and long-term supply chain stability.

Substitution Limitations: The primary difference is the unshielded configuration of the substitute versus the shielded design of the main part. Applications requiring electromagnetic shielding to prevent crosstalk or meet EMI specifications must evaluate whether the unshielded HCF1305-1R0-R is acceptable. The ferrite drum core construction of the substitute differs from the wirewound design of the main part; however, both achieve the specified inductance and current ratings at the test frequency of 100 kHz.

Frequently Asked Questions (FAQ)

Q: Can the HCF1305-1R0-R directly replace the HC5-1R0-R without circuit modification?

A: Direct replacement is possible for applications where electromagnetic shielding is not a critical design requirement. The electrical performance at 1 µH inductance and 21 A continuous current is equivalent. PCB layout compatibility is maintained due to identical footprint dimensions. If the original design relied on shielding to suppress EMI or crosstalk, the unshielded substitute may require additional circuit-level mitigation.

Q: What is the impact of the lower saturation current (24 A vs. 27 A) on circuit performance?

A: The saturation current of 24 A on the substitute remains above the 21 A continuous current rating, providing adequate margin for normal operation. Saturation current defines the threshold at which inductance begins to degrade. At 21 A continuous operation, the substitute operates well within its saturation margin. Transient current spikes must be evaluated against the 24 A limit; if the original design relied on the 27 A saturation headroom, this difference should be verified through circuit simulation.

Q: Are there packaging implications when switching from the main part to the substitute?

A: Yes. The HC5-1R0-R is supplied in nonstandard packaging, while the HCF1305-1R0-R is supplied in standard Tape & Reel (TR) format. This change simplifies procurement and assembly processes. The component footprint and mounting type remain identical, so no PCB redesign is required. Verify that assembly equipment is compatible with standard Tape & Reel packaging.

Q: How does the unshielded design of the HCF1305-1R0-R affect EMI performance?

A: Unshielded inductors exhibit higher radiated emissions and increased susceptibility to external magnetic fields compared to shielded designs. If the original circuit operates in an electromagnetically noisy environment or if the inductor is located near sensitive analog circuits, the unshielded substitute may introduce additional noise coupling. Conduct EMI testing or simulation to confirm acceptable performance in the target application.

Q: Is the improved DC resistance (1.9 mOhm vs. 2 mOhm) beneficial?

A: Yes. Lower DC resistance reduces resistive losses and heat generation at the same current level. For a 21 A application, the 0.1 mOhm improvement translates to reduced power dissipation and improved thermal performance. This is a favorable characteristic of the substitute.

Q: What is the significance of the extended operating temperature range (-40°C to 125°C vs. -25°C to 125°C)?

A: The substitute's extended lower temperature limit of -40°C provides additional operational margin for applications exposed to cold environments. If the original design operates only within -25°C to 125°C, this difference is not significant. For applications requiring cold-temperature performance, the substitute offers enhanced capability.

Q: Are there any compliance or supply chain advantages to using the HCF1305-1R0-R?

A: Yes. The substitute is in active production status with ROHS3 compliance and REACH unaffected certification, meeting current regulatory requirements. The main part is obsolete, creating long-term supply chain risk. Switching to the active substitute ensures continued availability and compliance with evolving environmental regulations.