Equivalent & Substitute Parts for 1234AS-H-1R2N=P3

Part Overview

The 1234AS-H-1R2N=P3 is a 1.2 µH shielded drum core, wirewound inductor manufactured by Murata Electronics, rated for 2.45 A with a maximum DC resistance of 60mOhm. 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 temperature range of -40°C to 85°C and is designed for surface mount applications in nonstandard packaging.

Substiute Parts

1234AS-H-1R2N=P3

Murata ElectronicsIn Stock: 9611234AS-H-1R2N=P3 Datasheet

Current PartRFQ

744025001

Würth ElektronikIn Stock: 5638744025001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1234AS-H-1R2N=P3 is determined by the following critical parameters:

• Inductance Value: Must match at 1.2 µH
• Core Type and Shielding: Must be ferrite-based shielded drum core, wirewound construction
• Current Rating: Substitute must meet or exceed 2.45 A
• DC Resistance: Substitute must not exceed 60mOhm to maintain circuit performance
• Saturation Current: Must support minimum 2.6 A
• Operating Temperature Range: Must support minimum -40°C ~ 85°C
• Mounting Type: Must be surface mount compatible
• Test Frequency: Must be characterized at 100 kHz

The Würth Elektronik 744025001 qualifies as a direct substitute based on matching inductance value, core material, shielding configuration, and surface mount design, while meeting or exceeding all current and resistance specifications.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744025001 is the qualified substitute for the obsolete Murata 1234AS-H-1R2N=P3. Selection is based on the following engineering criteria:

Product Status: The 744025001 is active and in production, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Electrical Performance: The substitute meets all critical electrical specifications. The 744025001 provides improved performance with lower DC resistance (42mOhm vs. 60mOhm), higher current rating (2.6 A vs. 2.45 A), and higher saturation current (3 A vs. 2.6 A).

Compliance and Certifications: The 744025001 is RoHS3 compliant and REACH unaffected, meeting modern regulatory requirements. Both parts carry MSL 1 (Unlimited) moisture sensitivity classification.

Temperature Range: The substitute supports an extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C), providing additional thermal margin for demanding applications.

Tolerance and Accuracy: The 744025001 offers tighter inductance tolerance (±20% vs. ±30%), improving circuit consistency and reducing design margin requirements.

Frequently Asked Questions (FAQ)

Q: Can the 744025001 directly replace the 1234AS-H-1R2N=P3 in existing designs?

A: Yes. Both parts share identical inductance values (1.2 µH), core material (ferrite), shielding configuration, and surface mount design. The 744025001 meets or exceeds all electrical specifications of the original part.

Q: What are the key differences between these parts?

A: The primary differences are product status (active vs. obsolete), DC resistance (42mOhm vs. 60mOhm), current rating (2.6 A vs. 2.45 A), tolerance (±20% vs. ±30%), and operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). All differences favor the substitute part.

Q: Are there packaging considerations for this substitution?

A: The original part uses nonstandard packaging, while the 744025001 uses standard 2828 package in Tape & Reel format. Physical dimensions differ slightly (2.80mm x 2.80mm x 3.00mm vs. 4.70mm x 4.50mm x 1.40mm). PCB layout and assembly process adjustments may be required.

Q: Does the lower DC resistance of the 744025001 affect circuit design?

A: Lower DC resistance (42mOhm vs. 60mOhm) reduces power dissipation and heat generation, which is beneficial for circuit performance. No design changes are required; the substitute performs better in this regard.

Q: What compliance standards apply to the 744025001?

A: The 744025001 is RoHS3 compliant and REACH unaffected. Both parts carry EAR99 ECCN classification and MSL 1 (Unlimited) moisture sensitivity rating.

Q: Is the extended temperature range of the 744025001 significant?

A: The 744025001 supports -40°C ~ 125°C versus -40°C ~ 85°C for the original part. This extended range provides additional thermal margin and may enable use in higher-temperature applications without design modification.