MMF336118 Stacked Rosette Strain Gauge Equivalent & Substitute Parts

Part Overview

The MMF336118 is a stacked rosette strain gauge manufactured by Micro-Measurements (Division of Vishay Precision Group). This component is designed for multi-directional strain measurement applications requiring ±1.5% measurement accuracy with 350 Ohms resistance. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing procurement and system integration.

Substiute Parts

MMF336118

Micro-Measurements (Division of Vishay Precision Group)In Stock: 897MMF336118 Datasheet

Current PartRFQ

MMF405057

Micro-Measurements (Division of Vishay Precision Group)In Stock: 826MMF405057 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for stacked rosette strain gauges is determined by the following critical parameters:

Pattern Type: Both the main part and substitute must be stacked rosette configuration to maintain identical measurement geometry and multi-directional strain sensing capability.

Active Dimensions: The active length (0.039" / 1.00mm per section) and active width (0.045" / 1.14mm per section) must remain constant to ensure compatibility with existing mounting fixtures and measurement grids.

Overall Pattern Dimensions: The overall pattern length (0.144" / 3.66mm) and width (0.147" / 3.73mm) must match to preserve spatial integration within measurement systems.

Resistance Value: The electrical resistance determines signal conditioning and bridge circuit configuration. Substitutes with different resistance values require recalibration of measurement electronics.

Strain Range and Resistance Tolerance: These parameters define measurement accuracy and repeatability. Variations affect data quality and system calibration requirements.

Operating Temperature Range: The temperature specification must encompass the intended application environment to maintain metrological performance.

RoHS Compliance: Environmental regulatory status must be maintained for applications subject to RoHS requirements.

Parameter Comparison

Engineering Selection Recommendations

Geometric Compatibility: The MMF405057 maintains identical active dimensions (0.039" × 0.045" per section) and overall pattern dimensions (0.144" × 0.147"), ensuring direct mechanical compatibility with existing mounting systems and measurement grids designed for the MMF336118.

Electrical Parameter Differences: The MMF405057 operates at 120 Ohms resistance compared to the MMF336118's 350 Ohms. This difference requires reconfiguration of signal conditioning circuits, bridge completion networks, and data acquisition system calibration. The substitute's ±3% strain range exceeds the original ±1.5% specification, providing broader measurement capability at the cost of reduced precision within the original measurement window.

Temperature Operating Range: The MMF405057 extends the upper temperature limit to 80°C compared to the MMF336118's 65°C maximum. Both parts maintain the -50°C lower limit. Applications operating above 65°C benefit from the extended range; applications below 65°C remain within both specifications.

Regulatory Compliance: Both parts maintain RoHS compliance status, satisfying environmental regulatory requirements for equivalent applications.

Product Availability: The MMF405057 is active in production with 788 pieces in stock, whereas the MMF336118 is discontinued. Selection of the substitute ensures long-term procurement viability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the MMF405057 be used as a direct mechanical replacement for the MMF336118?

A: Yes. Both parts share identical active dimensions (0.039" × 1.00mm per section length; 0.045" × 1.14mm per section width) and overall pattern dimensions (0.144" × 3.66mm length; 0.147" × 3.73mm width). Direct mounting compatibility is maintained.

Q: What electrical modifications are required when substituting MMF405057 for MMF336118?

A: The resistance difference (120 Ohms vs. 350 Ohms) requires recalibration of bridge completion networks and signal conditioning electronics. Measurement system gain settings and calibration coefficients must be adjusted to account for the different electrical impedance.

Q: How does the ±3% strain range of MMF405057 compare to the ±1.5% range of MMF336118?

A: The MMF405057 provides twice the measurement range, allowing detection of larger strain magnitudes. Within the original ±1.5% measurement window, the substitute maintains measurement capability but with reduced precision per unit strain due to the broader range specification.

Q: Are both parts RoHS compliant?

A: Yes. Both the MMF336118 and MMF405057 are RoHS compliant, maintaining regulatory compliance for applications subject to RoHS requirements.

Q: What is the temperature operating range difference?

A: The MMF336118 operates from -50°C to 65°C. The MMF405057 extends the upper limit to 80°C while maintaining the -50°C lower limit. Applications requiring operation above 65°C benefit from the substitute's extended range.

Q: What packaging format is provided for the MMF405057?

A: The MMF405057 is supplied in bag packaging, with 5 pieces per package. The MMF336118 packaging format is not specified in the available data.

Q: Is the MMF405057 available for immediate procurement?

A: Yes. The MMF405057 is active in production status with 788 pieces in current inventory, ensuring supply availability. The MMF336118 is discontinued at DiGi Electronics, making the substitute the recommended procurement path for ongoing applications.