MMF323482 Stacked Rosette Strain Gauge Equivalent & Substitute Parts

Part Overview

The MMF323482 is a stacked rosette strain gauge manufactured by Micro-Measurements (Division of Vishay Precision Group). This component is classified as obsolete and is used for multi-directional strain measurement applications requiring ±3% measurement accuracy. The part features a 120 Ohm resistance configuration with compact overall dimensions of 0.20" (5.1mm) in both length and width.

Due to its obsolete product status, identifying functionally equivalent active alternatives is necessary for ongoing procurement and design continuity. The substitute part identified maintains the core electrical and mechanical specifications required for direct replacement in existing applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MMF323482
Manufacturer	Micro-Measurements (Division of Vishay Precision Group)
Pattern Type	Stacked Rosette
Strain Range	±3%
Resistance	120 Ohms
Resistance Tolerance	±0.6%
Length - Active	0.039" (1.00mm) per section
Width - Active	0.045" (1.14mm) per section
Overall Dimensions	0.20" × 0.20" (5.1mm × 5.1mm)
Operating Temperature Range	-60 ~ 150°F (-50 ~ 65°C)
Product Status	Obsolete
RoHS Compliance	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the MMF323482 is based on strict equivalence of the following critical parameters:

Electrical Equivalence Criteria:

Pattern Type: Stacked Rosette configuration
Resistance: 120 Ohms nominal
Resistance Tolerance: ±0.6%
Strain Range: ±3%

Mechanical Equivalence Criteria:

Active Length: 0.039" (1.00mm) per section
Active Width: 0.045" (1.14mm) per section
Overall Pattern Dimensions: 0.144" × 0.147" (3.66mm × 3.73mm)
Overall Package Dimensions: 0.20" × 0.20" (5.1mm × 5.1mm)

Compliance Criteria:

RoHS Compliance status
ECCN and HTSUS classifications

The identified substitute part MMF405057 maintains all critical electrical and mechanical parameters, enabling direct functional replacement while offering active product status and improved availability.

Parameter Comparison

Parameter	MMF323482 (Main Part)	MMF405057 (Substitute)
Manufacturer	Micro-Measurements	Micro-Measurements
Pattern Type	Stacked Rosette	Stacked Rosette
Strain Range	±3%	±3%
Resistance	120 Ohms	120 Ohms
Resistance Tolerance	±0.6%	±0.6%
Length - Active	0.039" (1.00mm)	0.039" (1.00mm)
Width - Active	0.045" (1.14mm)	0.045" (1.14mm)
Length - Overall Pattern	0.144" (3.66mm)	0.144" (3.66mm)
Width - Overall Pattern	0.147" (3.73mm)	0.147" (3.73mm)
Overall Dimensions	0.20" × 0.20" (5.1mm × 5.1mm)	0.20" × 0.20" (5.1mm × 5.1mm)
Operating Temperature Range	-50 ~ 65°C	-50 ~ 80°C
Product Status	Obsolete	Active
RoHS Compliance	RoHS Compliant	RoHS Compliant
ECCN	EAR99	EAR99
HTSUS	9031.80.8085	9031.80.8085

Engineering Selection Recommendations

The MMF405057 is the manufacturer-recommended substitute for the obsolete MMF323482. Both parts are manufactured by Micro-Measurements and share identical electrical specifications (120 Ohm resistance, ±0.6% tolerance, ±3% strain range) and mechanical dimensions (0.039" × 0.045" active area, 0.20" × 0.20" overall package).

The substitute part offers the following advantages:

Product Status: MMF405057 is an active product with confirmed ongoing availability (788 Pcs in stock), whereas MMF323482 is obsolete with limited remaining inventory (1141 Pcs).

Compliance: Both parts maintain RoHS compliance and identical ECCN/HTSUS classifications, ensuring regulatory equivalence.

Operating Temperature: MMF405057 extends the upper operating temperature limit to 80°C compared to 65°C for MMF323482, providing broader thermal operating range within the specified -50°C minimum for both parts.

Series Designation: MMF323482 belongs to the C2A series, while MMF405057 belongs to the C4A series. Both series employ identical stacked rosette strain gauge technology with matching electrical and mechanical parameters.

Direct substitution of MMF405057 for MMF323482 is supported by parameter equivalence and manufacturer recommendation.

Frequently Asked Questions (FAQ)

Q: Can MMF405057 be used as a direct replacement for MMF323482 in existing applications?

A: Yes. Both parts share identical electrical specifications (120 Ohm resistance, ±0.6% tolerance, ±3% strain range), mechanical dimensions (0.039" × 0.045" active area, 0.20" × 0.20" overall), and operating temperature minimum of -50°C. The substitute part is the manufacturer-recommended equivalent.

Q: What is the difference between the C2A and C4A series designations?

A: MMF323482 belongs to the C2A series (obsolete), while MMF405057 belongs to the C4A series (active). Both series employ stacked rosette strain gauge technology with identical electrical and mechanical specifications for this application.

Q: Are there packaging differences between these parts?

A: MMF323482 is supplied with SP70 packaging designation. MMF405057 is supplied in Bag packaging. Both maintain the same physical component dimensions and electrical characteristics.

Q: Does the extended operating temperature range of MMF405057 affect compatibility?

A: No. The extended upper temperature limit of MMF405057 (80°C versus 65°C) represents an expansion of the operating envelope. Applications operating within the original -50 ~ 65°C range of MMF323482 remain fully compatible with MMF405057.

Q: Are both parts RoHS compliant?

A: Yes. Both MMF323482 and MMF405057 are RoHS compliant and share identical ECCN (EAR99) and HTSUS (9031.80.8085) classifications.

Q: What is the resistance tolerance specification for these strain gauges?

A: Both parts specify ±0.6% resistance tolerance on the 120 Ohm nominal value, ensuring consistent electrical performance across production batches.

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