HCM1305-330-R Equivalent & Substitute Parts

Part Overview

The HCM1305-330-R is a 33 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 5.2 A continuous current with a maximum DC resistance of 85.5 mOhm and operates across the temperature range of -55°C to 125°C. The part maintains Active product status and is RoHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved through alternative designs while maintaining the same inductance value, shielding characteristics, and core functional requirements. The HCM1305-330-R has one qualified substitute that meets the critical electrical parameters for this application category.

Substiute Parts

HCM1305-330-R

Eaton - Electronics DivisionIn Stock: 761HCM1305-330-R Datasheet

Current PartRFQ

PA4343.333NLT

Pulse ElectronicsIn Stock: 3219PA4343.333NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCM1305-330-R is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Inductance value must be 33 µH at 100 kHz test frequency
• Current rating must be 5.2 A or higher
• Saturation current (Isat) must be 8 A or higher
• DC resistance must not exceed 85.5 mOhm
• Shielding must be present to maintain EMI containment

Physical and Environmental Requirements:

• Surface mount package configuration
• Operating temperature range must encompass -55°C to 125°C or be compatible with the application's thermal requirements
• RoHS3 compliance mandatory

Regulatory and Quality Requirements:

• Active product status
• RoHS3 compliance
• Moisture sensitivity level 1 (Unlimited)

The PA4343.333NLT from Pulse Electronics qualifies as a direct substitute because it meets all critical electrical parameters while offering improved performance characteristics in current rating and DC resistance.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: HCM1305-330-R

The HCM1305-330-R remains the specified component when the full operating temperature range of -55°C to 125°C is required. This part is manufactured by Eaton - Electronics Division, maintains Active product status, and carries RoHS3 compliance. Current inventory of 747 pieces supports immediate availability.

Substitute Part: PA4343.333NLT

The PA4343.333NLT from Pulse Electronics is a qualified substitute when the operating temperature range of -40°C to 125°C is acceptable for the application. This substitute provides measurable performance improvements:

• Current rating increased from 5.2 A to 8 A
• Saturation current increased from 8 A to 11 A
• DC resistance reduced from 85.5 mOhm to 58 mOhm (32% improvement)

The PA4343.333NLT maintains Active product status, RoHS3 compliance, and carries AEC-Q200 automotive qualification. Inventory availability is higher at 3,141 pieces. The substitute uses a molded construction versus the drum core design of the original part, with slightly larger physical dimensions (0.551" L x 0.504" W x 0.256" H versus 0.524" L x 0.480" W x 0.197" H).

Selection Criteria:

• Use HCM1305-330-R when the -55°C minimum operating temperature is mandatory
• Use PA4343.333NLT when operating temperature minimum of -40°C is acceptable and improved current handling or reduced DC resistance provides system benefits
• Both parts are RoHS3 compliant and suitable for regulated applications
• Physical footprint differences must be verified against PCB layout constraints

Frequently Asked Questions (FAQ)

Q: Can the PA4343.333NLT replace the HCM1305-330-R in all applications?

A: The PA4343.333NLT is electrically compatible for applications operating at -40°C or above. If your circuit operates below -40°C, the HCM1305-330-R must be used. Both parts deliver 33 µH inductance with identical tolerance and shielding characteristics.

Q: What is the difference between drum core and molded construction?

A: The HCM1305-330-R uses drum core wirewound construction, while the PA4343.333NLT uses molded construction. Both are shielded and surface mount. The molded design of the substitute achieves lower DC resistance (58 mOhm versus 85.5 mOhm) and higher current ratings.

Q: Will the larger physical dimensions of the PA4343.333NLT cause PCB layout issues?

A: The PA4343.333NLT is 0.027" longer, 0.024" wider, and 0.059" taller than the HCM1305-330-R. PCB layout must be verified to confirm adequate clearance before substitution.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the HCM1305-330-R and PA4343.333NLT are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What does the AEC-Q200 rating on the PA4343.333NLT indicate?

A: AEC-Q200 is an automotive qualification standard. The PA4343.333NLT meets automotive reliability and performance requirements, making it suitable for automotive and high-reliability applications.

Q: Can I use the PA4343.333NLT if my design specifies the HCM1305-330-R?

A: Substitution requires verification that the -40°C minimum operating temperature is acceptable for your application and that physical dimensions fit the PCB layout. The improved electrical performance (higher current rating, lower DC resistance) typically provides design margin benefits.

Q: What is the significance of the 85.5 mOhm and 58 mOhm DC resistance values?

A: DC resistance determines power dissipation in the inductor. Lower resistance reduces heat generation. At 5.2 A, the HCM1305-330-R dissipates approximately 2.3 W, while the PA4343.333NLT dissipates approximately 1.6 W under identical conditions. This 32% reduction in power loss may improve thermal performance in space-constrained applications.

Q: Are both parts available in the same packaging format?

A: Yes. Both the HCM1305-330-R and PA4343.333NLT are supplied in Tape & Reel (TR) packaging suitable for automated PCB assembly.