TacticScaleWhat Littelfuse Does & How It Makes Money (LFUS)
Updated October 2026 · reflects Littelfuse's latest reported financials
Maker of circuit protection, power semiconductors, and electrical safety components. It earns revenue by selling electronic components, modules, and subassemblies across its Electronics, Transportation, and Industrial segments.
How Littelfuse makes money
It earns revenue by selling electronic components, modules, and subassemblies across its Electronics, Transportation, and Industrial segments. Sales go through distributors, its direct sales force, and manufacturers' representatives.
What Littelfuse does
Littelfuse, founded in 1927 and headquartered in Rosemont, Illinois, designs and manufactures electronic components, modules, and subassemblies focused on circuit protection, power control, and sensing. Its Electronics segment is the broadest, offering fuses, varistors, ESD and TVS protection devices, thyristors, and power semiconductors including silicon and silicon carbide MOSFETs, diodes, and IGBTs, serving markets from data centers and industrial controls to consumer electronics, healthcare, and vehicles. The Transportation segment supplies fuses, battery cable protectors, circuit breakers, power distribution modules, and sensors for trucks, buses, construction, agricultural, recreational, passenger, and marine vehicles. The Industrial segment provides industrial fuses, protection relays, contactors, ground fault and arc fault devices, and temperature sensors for renewable energy, energy storage, EV charging infrastructure, HVAC, mining, and factory automation. Products are sold through distributors, a direct sales force, and manufacturers' representatives.
Products & services
- Fuses and resettable fuses
- TVS diodes and ESD suppressors
- Silicon and silicon carbide MOSFETs and IGBTs
- Automotive power distribution modules and circuit breakers
- Industrial protection relays and contactors
- Reed switch magnetic sensors
What is Littelfuse worth?
On an owner-earnings DCF, Littelfuse's most-likely value is about $364 versus a recent price near $426 (15% above fair value). But TacticScale only calls a stock undervalued when the price sits below its conservative no-growth floor (~$169) with a margin of safety — so the honest verdict here is “Fairly priced — no edge.” Fair value earns its keep only at the extremes, not in the wide middle.
Price sits in the normal range — fair value isn't actionable here; it earns its keep only when price drops below the no-growth floor, or runs to roughly double the optimistic case.
Analysis, not advice. Fair value is a margin-of-safety estimate from a deterministic owner-earnings DCF, not a price target or recommendation. See the full breakdown →
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