Sifting through countless of stocks in the Electronic Equipment, Instruments & Components industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Littelfuse, Inc. or Teledyne Technologies Incorporated because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Littelfuse, Inc. and Teledyne Technologies Incorporated compare based on key financial metrics to determine which better meets your investment needs.

About Littelfuse, Inc. and Teledyne Technologies Incorporated

Littelfuse, Inc. designs, manufactures, and sells electronic components, modules, and subassemblies. It operates through three segments: Electronics, Transportation, and Industrial. Its Electronics segment offers fuses and fuse accessories, coefficient resettable fuses, switches and interconnect solutions, polymer electrostatic discharge suppressors, varistors, reed switch based magnetic sensing, and gas discharge tubes; and discrete transient voltage suppressor diodes, TVS diode arrays, protection and switching thyristors, silicon and silicon carbide metal-oxide-semiconductor field effect transistors and diodes, and insulated gate bipolar transistors. This segment serves data center computing and communications infrastructure, industrial controls, building controls, aerospace and defense, appliances, consumer electronics solutions, healthcare solutions, industrial equipment, energy storage, diversified industrials, grid and utility infrastructure, passenger vehicles, and commercial vehicles. Its Transportation segment provides blade, resettable, high-current, and high-voltage fuses; battery cable protectors; circuit breakers, and power distribution modules; and sensor products. This segment serves heavy-duty truck and bus, construction, agriculture, off-road and recreational vehicles, material handling, passenger and commercial vehicles, and marine markets. Its Industrial segment offers industrial fuses, protection relays, contactors, transformers, residual current devices and monitors, ground fault circuit interrupters, arc fault detection devices, solid state switches, and temperature sensors for use in renewable energy and energy storage systems, electric vehicle infrastructure, HVAC systems, industrial safety, non-residential construction, MRO, mining, and factory automation applications. It sells its products through distributors, direct sales force, and manufacturers’ representatives. The company was founded in 1927 and is headquartered in Rosemont, Illinois.

Teledyne Technologies Incorporated provides enabling technologies for industrial growth markets in the United States, Europe, Asia, and internationally. The Digital Imaging provides visible spectrum sensors and digital cameras; and infrared, ultraviolet, visible, and X-ray spectra products, as well as micro electromechanical systems and semiconductors, including analog-to-digital and digital-to-analog converters. This segment offers cooled and uncooled infrared or thermal products, including sensors, camera cores, and camera systems; high-resolution, low-dose X-ray sensors, high-power microwave, and high-energy X-ray subsystems; and instruments for the measurement of physical properties and maritime products, as well as develops and manufactures multi-spectrum electro-optic/infrared imaging systems and associated products, such as lasers, optics, and radars, CBRNE (Chemical, Biological, Radiological, Nuclear and Explosive detectors), and unmanned air and ground systems. The Instrumentation segment provides monitoring, control, and electronic test and measurement equipment; and power and communications connectivity devices for distributed instrumentation systems and sensor networks. The Aerospace and Defense Electronics segment offers electronic and optical components and subsystems, data acquisition and communications components and equipment, harsh environment interconnects, general aviation batteries and other components; and onboard avionics systems and ground-based applications, aircraft data and connectivity solutions, hardware systems, and software applications. The Engineered Systems segment provides systems engineering, integration and advanced technology development, and complex manufacturing solutions for defense, space, environmental, and energy applications; and designs and manufactures electrochemical energy systems and specialty electronics for military applications. The company was founded in 1960 and is headquartered in Thousand Oaks, California.

Latest Electronic Equipment, Instruments & Components and Littelfuse, Inc., Teledyne Technologies Incorporated Stock News

As of April 23, 2026, Littelfuse, Inc. had a $10.1 billion market capitalization, compared to the Electronic Equipment, Instruments & Components median of $807.3 million. Littelfuse, Inc.’s stock is up 59.8% in 2026, up 3.8% in the previous five trading days and up 145.86% in the past year.

Currently, Littelfuse, Inc. does not have a price-earnings ratio. Littelfuse, Inc.’s trailing 12-month revenue is $2.4 billion with a -3.0% net profit margin. Year-over-year quarterly sales growth most recently was 12.2%. Analysts expect adjusted earnings to reach $13.018 per share for the current fiscal year. Littelfuse, Inc. currently has a 0.7% dividend yield.

As of April 23, 2026, Teledyne Technologies Incorporated had a $30.2 billion market cap, putting it in the 90th percentile of all stocks. Teledyne Technologies Incorporated’s stock is up 26.8% in 2026, up 1.8% in the previous five trading days and up 41.35% in the past year.

Currently, Teledyne Technologies Incorporated’s price-earnings ratio is 34.5. Teledyne Technologies Incorporated’s trailing 12-month revenue is $6.1 billion with a 15.0% net profit margin. Year-over-year quarterly sales growth most recently was 7.3%. Analysts expect adjusted earnings to reach $24.080 per share for the current fiscal year. Teledyne Technologies Incorporated does not currently pay a dividend.

How We Compare Littelfuse, Inc. and Teledyne Technologies Incorporated Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Littelfuse, Inc. and Teledyne Technologies Incorporated’s stock grades to see how they measure up against one another.

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Littelfuse, Inc. and Teledyne Technologies Incorporated Stock Value Grades

Company	Ticker	Value
Littelfuse, Inc.	LFUS	D
Teledyne Technologies Incorporated	TDY	D

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection.

Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

Littelfuse, Inc. has a Value Score of 21, which is Expensive. Teledyne Technologies Incorporated has a Value Score of 23, which is Expensive.

The Value Stock Winner: No Clear Winner

Neither Littelfuse, Inc. or Teledyne Technologies Incorporated has a high enough value grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolio. It’s important to look at a wide range of financial metrics in order to determine if Littelfuse, Inc. or Teledyne Technologies Incorporated is the better investment when it comes to value.

Littelfuse, Inc. and Teledyne Technologies Incorporated’s Quality Grades

Company	Ticker	Quality
Littelfuse, Inc.	LFUS	B
Teledyne Technologies Incorporated	TDY	A

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Littelfuse, Inc. has a Quality Score of 74, which is Strong. Teledyne Technologies Incorporated has a Quality Score of 86, which is Very Strong.

The Quality Grade Winner: Teledyne Technologies Incorporated

As you can clearly see from the Quality Grade breakdown above, Teledyne Technologies Incorporated has a better overall quality grade than Littelfuse, Inc.. For investors who are looking for companies with higher quality than others in the same industry, Teledyne Technologies Incorporated could be a good stock to add to their portfolios. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Littelfuse, Inc. and Teledyne Technologies Incorporated’s Momentum Grades

Company	Ticker	Momentum
Littelfuse, Inc.	LFUS	A
Teledyne Technologies Incorporated	TDY	B

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Littelfuse, Inc. has a Momentum Score of 90, which is Very Strong. Teledyne Technologies Incorporated has a Momentum Score of 66, which is Strong.

The Momentum Grade Winner: Littelfuse, Inc.

As you can clearly see from the Momentum Grade breakdown above, Littelfuse, Inc. is considered to have stronger momentum compared to Teledyne Technologies Incorporated. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Littelfuse, Inc. could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Littelfuse, Inc. and Teledyne Technologies Incorporated Grades

In addition to Momentum, Quality and Value, A+ Investor also provides grades for Growth and Estimate Revisions.

Earnings estimate revisions scores take into account the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, surprises beget further surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Littelfuse, Inc. and Teledyne Technologies Incorporated pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Littelfuse, Inc. or Teledyne Technologies Incorporated Stock?

Overall, Littelfuse, Inc. stock has a Value Score of 21, Momentum Score of 90 and Quality Score of 74.

Teledyne Technologies Incorporated stock has a Value Score of 23, Momentum Score of 66 and Quality Score of 86.

Comparing Littelfuse, Inc. and Teledyne Technologies Incorporated’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.