MRMS301A Equivalent & Substitute Parts

Part Overview

The MRMS301A is a magnetoresistive unipolar switch sensor manufactured by Murata Electronics, designed for digital switching applications requiring low-power operation. This component features a push-pull output configuration with a sensing range of 3mT trip and 0.2mT release, operating across a temperature range of -40°C to 85°C. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

MRMS301A

Murata ElectronicsIn Stock: 1112MRMS301A Datasheet

Current PartRFQ

MRMS201A-001

Murata ElectronicsIn Stock: 16523MRMS201A-001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MRMS301A is determined by the following critical parameters:

• Voltage Supply Compatibility: Both main and substitute parts must operate within the 1.6V – 4.6V range to ensure direct replacement in existing circuits.
• Operating Temperature Range: The substitute must support the full -40°C to 85°C operating window.
• Mounting Type and Package: Surface mount configuration with SOT-23-3 compatible packaging ensures mechanical and electrical compatibility.
• Technology Platform: Magnetoresistive technology maintains functional equivalence.
• Output Configuration: The substitute must provide compatible output characteristics for the application circuit.

The MRMS201A-001 qualifies as a substitute based on shared voltage supply range, operating temperature compatibility, surface mount configuration, and magnetoresistive technology foundation. However, functional differences exist in switch type (latch vs. unipolar) and sensing range parameters, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The MRMS201A-001 is available as an active product from Murata Electronics, providing supply continuity for the obsolete MRMS301A. Both components share identical voltage supply ranges (1.6V – 4.6V) and operating temperature specifications (-40°C to 85°C), establishing baseline electrical compatibility.

The MRMS201A-001 carries ROHS3 compliance certification, whereas the MRMS301A status is not specified. This compliance advantage supports regulatory requirements in modern manufacturing environments.

Functional differences between the parts require circuit-level evaluation. The MRMS301A operates as a unipolar switch with push-pull output, while the MRMS201A-001 functions as a latch with digital output. The sensing range differs: MRMS301A requires 3mT trip with 0.2mT release, compared to MRMS201A-001 at 2.5mT trip with 0.5mT release. Current consumption increases from 8µA to 12µA in the substitute part.

Selection of the MRMS201A-001 is appropriate when application circuits can accommodate latch functionality and the modified sensing thresholds. Direct replacement without circuit modification is not suitable for applications requiring unipolar switch behavior.

Frequently Asked Questions (FAQ)

Q: Can the MRMS201A-001 directly replace the MRMS301A without circuit modifications?

A: Direct replacement is not recommended. While both parts share voltage supply and temperature operating ranges, the MRMS301A functions as a unipolar switch with push-pull output, whereas the MRMS201A-001 is a latch with digital output. Application circuits designed for unipolar switch behavior require functional redesign to accommodate latch operation.

Q: What are the key differences in sensing range between these parts?

A: The MRMS301A operates with a 3mT trip threshold and 0.2mT release threshold. The MRMS201A-001 operates with a 2.5mT trip threshold and 0.5mT release threshold. Applications with strict magnetic field sensitivity requirements must account for these differences in sensor calibration and magnetic circuit design.

Q: Are both parts compatible with the same PCB footprint?

A: Both components use surface mount technology with SOT-23-3 compatible packaging. The MRMS201A-001 supports multiple package options (TO-236-3, SC-59, SOT-23-3), providing layout flexibility. Verification of specific footprint requirements with PCB design documentation is necessary.

Q: What is the significance of the product status difference?

A: The MRMS301A is classified as obsolete, indicating discontinued manufacturing and limited availability. The MRMS201A-001 is active, ensuring ongoing supply and manufacturing support. For new designs or production continuity, the active status of MRMS201A-001 provides supply security.

Q: How does the increased current consumption of MRMS201A-001 affect system design?

A: The MRMS201A-001 draws a maximum of 12µA compared to 8µA for the MRMS301A. This 4µA increase is minimal for most battery-powered applications but should be evaluated in ultra-low-power designs where cumulative current consumption is critical.

Q: What compliance advantages does the MRMS201A-001 offer?

A: The MRMS201A-001 carries ROHS3 compliance certification, supporting regulatory requirements in electronics manufacturing. Both parts maintain REACH Unaffected status. For applications subject to environmental compliance mandates, the ROHS3 certification of MRMS201A-001 provides regulatory alignment.