1234AS-H-330M=P3 Equivalent & Substitute Parts

Part Overview

The 1234AS-H-330M=P3 is a 33 µH shielded drum core, wirewound inductor manufactured by Murata Electronics, designed for surface mount applications with a current rating of 630 mA and maximum DC resistance of 648 mOhm. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 85°C and is rated for unlimited moisture sensitivity (MSL 1).

Substiute Parts

1234AS-H-330M=P3

Murata ElectronicsIn Stock: 11021234AS-H-330M=P3 Datasheet

Current PartRFQ

7447715330

Würth ElektronikIn Stock: 13417447715330 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1234AS-H-330M=P3 is based on the following critical parameters:

• Inductance Value: 33 µH (±20% tolerance maintained)
• Core Type: Ferrite drum core, wirewound construction
• Shielding: Shielded configuration required
• Mounting: Surface mount technology
• Current Handling: Minimum saturation current must meet or exceed 550 mA
• DC Resistance: Lower DCR values are acceptable as they represent improved performance
• Temperature Range: Operating range must encompass or exceed -40°C to 85°C
• Moisture Sensitivity: MSL 1 classification maintained

The substitute part 7447715330 (Würth Elektronik WE-PD series) meets all substitution criteria with enhanced electrical performance characteristics, including higher current rating (2.3 A), lower DC resistance (85 mOhm), and extended temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

The 7447715330 (Würth Elektronik WE-PD series) is the qualified substitute for the obsolete 1234AS-H-330M=P3. Selection is based on the following engineering factors:

Product Status: The original part is obsolete, while the substitute is active and in production, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: The substitute maintains the 33 µH inductance value with identical ±20% tolerance. The higher current rating (2.3 A vs. 630 mA) and significantly lower DC resistance (85 mOhm vs. 648 mOhm) provide improved performance margins without circuit redesign requirements.

Thermal Performance: The extended operating temperature range (-40°C to 125°C) exceeds the original specification, providing additional operational headroom.

Compliance & Certifications: The substitute carries AEC-Q200 qualification and ROHS3 compliance, meeting automotive and industrial standards. Both parts maintain MSL 1 classification.

Packaging: Both components use surface mount technology with nonstandard package dimensions. Physical size differences exist (original: 4.70mm × 4.50mm × 1.40mm; substitute: 12.00mm × 12.00mm × 4.50mm) and must be evaluated for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 7447715330 directly replace the 1234AS-H-330M=P3 without circuit modification?

A: Electrical substitution is valid based on inductance value, tolerance, core type, and shielding. However, the substitute has larger physical dimensions (12.00mm × 12.00mm vs. 4.70mm × 4.50mm), requiring PCB layout verification before implementation.

Q: What is the significance of the lower DC resistance in the substitute part?

A: The 85 mOhm DCR of the substitute (versus 648 mOhm in the original) represents improved efficiency and reduced power dissipation. This is a performance enhancement that does not compromise compatibility.

Q: Why is the substitute part rated for higher current (2.3 A vs. 630 mA)?

A: The higher current rating provides additional design margin and operational headroom. Circuits designed for 630 mA operation remain fully compatible with the higher-rated substitute.

Q: Are there any compliance differences between the original and substitute?

A: The substitute carries AEC-Q200 qualification and ROHS3 compliance, providing enhanced traceability and automotive-grade reliability. The original part status is obsolete. Both maintain MSL 1 classification.

Q: What packaging format is used for the substitute part?

A: The 7447715330 is supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly operations.

Q: How do the operating temperature ranges compare?

A: The original operates from -40°C to 85°C, while the substitute operates from -40°C to 125°C. The extended upper temperature limit of the substitute provides additional thermal margin for demanding applications.