C2A-13-125LW-120 Strain Gauge Equivalent & Substitute Parts

Part Overview

The MMF307445 C2A-13-125LW-120 is a linear strain gauge manufactured by Micro-Measurements (Division of Vishay Precision Group). This component is classified as obsolete, indicating it is no longer in active production. The strain gauge features a 120 Ohm resistance with ±3% strain measurement capability and is designed for applications requiring precise linear strain measurement in temperature ranges from -50°C to 80°C.

Due to its obsolete status, locating replacement units from original inventory becomes increasingly difficult. Identifying equivalent substitute parts ensures continuity in repair, maintenance, and new design implementations where this specification remains applicable.

Substiute Parts

MMF307445

Micro-Measurements (Division of Vishay Precision Group)In Stock: 881MMF307445 Datasheet

Current PartRFQ

MMF404141

Micro-Measurements (Division of Vishay Precision Group)In Stock: 942MMF404141 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the C2A-13-125LW-120 strain gauge is determined by the following critical parameters:

Primary Substitution Criteria:

• Pattern Type: Linear configuration for uniaxial strain measurement
• Resistance Value: 120 Ohms nominal
• Strain Range: ±3% measurement capability
• Active Dimensions: 0.125" length × 0.070" width (3.18 mm × 1.78 mm)
• Operating Temperature Range: -50°C to 80°C minimum
• Resistance Tolerance: ±0.6% or better
• Moisture Sensitivity Level: MSL 1 (Unlimited)

The substitute part MMF404141 (C4A-13 series) is identified as the manufacturer-recommended equivalent. While specific dimensional and electrical parameters for the C4A-13 are not fully detailed in available documentation, this part is designated by Micro-Measurements as the active production replacement for the obsolete C2A-13-125LW-120 configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MMF404141 (C4A-13 Linear Strain Gauge)

The MMF404141 is the manufacturer-designated replacement for the obsolete MMF307445. Selection of this substitute is based on the following engineering factors:

1. Product Status: The C4A-13 series maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete C2A-13-125LW-120.

2. Manufacturer Continuity: Both parts originate from Micro-Measurements (Division of Vishay Precision Group), ensuring consistent design philosophy, calibration standards, and technical support.

3. Regulatory Compliance: The MMF404141 carries RoHS Compliant certification, meeting current environmental and regulatory requirements for electronic components in industrial and commercial applications.

4. Moisture Sensitivity: Both parts share identical MSL 1 (Unlimited) classification, indicating equivalent moisture handling and storage requirements.

Application Verification: Before final component selection, confirm that the C4A-13 series specifications (active dimensions, resistance value, strain range, and operating temperature range) align with your specific application requirements. Contact Micro-Measurements technical support with your application parameters for formal compatibility verification.

Frequently Asked Questions (FAQ)

Q1: Why is the C2A-13-125LW-120 considered obsolete?

A: The MMF307445 C2A-13-125LW-120 has been discontinued by Micro-Measurements and is no longer manufactured. While existing inventory may be available through authorized distributors, new production is unavailable. The C4A-13 series represents the current active production line for equivalent linear strain gauge applications.

Q2: What are the key parameters that determine if a strain gauge can substitute for the C2A-13-125LW-120?

A: Critical substitution parameters include: pattern type (linear), resistance value (120 Ohms), strain range (±3%), active dimensions (0.125" × 0.070"), resistance tolerance (±0.6%), operating temperature range (-50°C to 80°C minimum), and moisture sensitivity level (MSL 1). Any substitute must match or exceed these specifications.

Q3: Is the MMF404141 C4A-13 a direct pin-for-pin replacement?

A: The MMF404141 is the manufacturer-recommended equivalent. However, complete dimensional and electrical specifications for the C4A-13 series require verification against your specific application requirements. Contact Micro-Measurements with your application details for formal compatibility confirmation.

Q4: What is the difference between the C2A and C4A series?

A: Both series are manufactured by Micro-Measurements for linear strain measurement. The C2A series is obsolete, while the C4A series represents current active production. The C4A-13 is designated as the replacement for C2A-13 configurations.

Q5: Are there any compliance differences between the two parts?

A: The MMF404141 (C4A-13) carries RoHS Compliant certification, whereas RoHS status for the obsolete MMF307445 is not specified. Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q6: How should I verify compatibility before ordering the substitute?

A: Obtain the complete technical datasheet for the MMF404141 C4A-13 from Micro-Measurements. Cross-reference all electrical parameters (resistance, strain range, tolerance), mechanical dimensions (active and overall), and operating temperature range against your application specifications. Contact Micro-Measurements technical support if any parameters require clarification.