C2A-06-125LR-350 Strain Gauge Equivalent & Substitute Parts

Part Overview

The MMF307401 (C2A-06-125LR-350) is a rectangular rosette strain gauge manufactured by Micro-Measurements, a division of Vishay Precision Group. This component is designed for multi-axis strain measurement applications requiring simultaneous data acquisition across three perpendicular axes. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support, maintenance, and repair operations.

Substiute Parts

MMF307401

Micro-Measurements (Division of Vishay Precision Group)In Stock: 1115MMF307401 Datasheet

Current PartRFQ

MMF404199

Micro-Measurements (Division of Vishay Precision Group)In Stock: 1069MMF404199 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of strain gauge components is determined by the following critical parameters:

Pattern Type: The rectangular rosette configuration is the primary functional requirement. This pattern enables three-axis strain measurement and cannot be substituted with alternative rosette geometries without compromising measurement capability.

Resistance Value: The 350 Ohm nominal resistance establishes compatibility with standard quarter-bridge and half-bridge measurement circuits. Substitutes must maintain this resistance specification.

Strain Range: The ±3% strain range defines the measurement envelope. Substitutes must support equivalent or greater strain capacity.

Active Dimensions: The 0.125" × 0.070" active area establishes the spatial resolution and mounting footprint. These dimensions are critical for applications with dimensional constraints.

Resistance Tolerance: The ±0.6% tolerance ensures measurement accuracy and circuit balance in multi-element configurations.

Operating Temperature Range: The -50 ~ 80°C operating window defines environmental compatibility.

Moisture Sensitivity Level: MSL 1 classification indicates unlimited shelf life and no moisture conditioning requirements.

The substitute part MMF404199 (C4A-06 RECT ROSETTE) is identified as the manufacturer-recommended equivalent. However, complete parameter alignment cannot be confirmed due to incomplete technical data in the substitute specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MMF404199 (C4A-06 RECT ROSETTE) is the manufacturer-recommended equivalent and carries active product status. This part is RoHS compliant, providing regulatory advantage for new designs and procurement cycles. The shared rectangular rosette pattern and MSL 1 classification establish functional alignment with the obsolete C2A-06-125LR-350.

Verification Requirement: Complete technical specifications for the MMF404199 must be obtained from Micro-Measurements to confirm alignment of strain range, resistance value, resistance tolerance, active dimensions, and operating temperature range before final component selection.

Inventory Consideration: The C2A-06-125LR-350 maintains 1,081 pieces in current stock. The MMF404199 substitute maintains 1,031 pieces in inventory, supporting immediate availability for replacement applications.

Compliance Status: The MMF404199 RoHS compliance status provides advantage for applications subject to environmental regulations. The original C2A-06-125LR-350 RoHS status is not specified.

Frequently Asked Questions (FAQ)

Q: Can the MMF404199 directly replace the MMF307401 in existing circuits?

A: The rectangular rosette pattern and MSL 1 classification indicate functional compatibility. However, confirmation of matching strain range, resistance value, and resistance tolerance is required before direct substitution. Consult complete technical datasheets for both parts.

Q: What is the significance of the rectangular rosette pattern?

A: The rectangular rosette configuration enables simultaneous measurement of strain along three perpendicular axes. This pattern cannot be substituted with alternative rosette types (delta, tee, or other geometries) without altering measurement capability and circuit design.

Q: Why is the 350 Ohm resistance specification critical?

A: The 350 Ohm nominal resistance establishes compatibility with standard strain measurement bridge circuits. Substitutes with different resistance values require circuit recalibration and may introduce measurement errors.

Q: What does MSL 1 (Unlimited) mean for strain gauge selection?

A: MSL 1 classification indicates the component has unlimited shelf life and requires no moisture conditioning or baking procedures prior to use. Both the original and substitute parts carry this classification.

Q: Is the MMF404199 suitable for the same temperature range applications?

A: The operating temperature range for MMF404199 is not specified in available data. Confirmation of -50 ~ 80°C compatibility is required before use in temperature-critical applications.

Q: What is the advantage of RoHS compliance in the substitute part?

A: RoHS compliance ensures the substitute part meets environmental regulations for hazardous substance restrictions. This is advantageous for applications subject to regulatory requirements or customer specifications mandating RoHS-compliant components.

Q: Are there dimensional differences between the C2A and C4A series?

A: Complete dimensional data for the MMF404199 (C4A-06) is not provided. Comparison of active length, active width, and overall pattern dimensions is necessary to confirm mechanical compatibility with existing mounting fixtures and circuit board layouts.