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Littelfuse

Littelfuse 103JG1

103JG1 variants from Littelfuse

103JG1 Datasheet

Variants

2

Mfr

Littelfuse

Lifecycle

Active

103JG1 Overview

What changes between part numbers, and what to check before you lock the BOM — Sensors.

Key Features

  • Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
  • 2 distinct suffix patternsExamples: F, K. Decode suffix meaning in the ordering notes under the variant table.

Target Applications

  • Sensors — design-in and field replacement
  • BOM scrub where only the base prefix is known but suffix is TBD
  • Second-source checks when the original MPN is constrained

Ordering Variants

Compare 2 103JG1 part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part NumberDescriptionManufacturerLifecycleRoHSAvailabilityAction
103JG1FNTC Thermistor, 10000ohm, Through Hole Mount, AXIAL LEADEDLittelfuseActiveCompliantIn Stock
RFQ
103JG1K10kΩ NTC Thermistor, 2-Terminal, Axial LeadLittelfuseActiveCompliantIn Stock
RFQ

Ordering Code Differences

How suffixes on 103JG1 map to package, grade, and reel options.

How to Choose the Right 103JG1 Sensors

📦

Match the footprint first

Pull the exact package drawing for your MPN — base-number swaps fail most often at the footprint, not the schematic.

⚡

Electrical headroom

Compare voltage and current columns in the variant table. For 103JG1, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.

🌡️

Temp grade letter matters

Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.

🔢

Copy the full MPN

Do not BOM only "103JG1" — include the full suffix (e.g. F, K). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for 103JG1 product family

Identity

Base Model
103JG1
Manufacturer
Littelfuse
Listed Variants
2

Variant Parameters

Lifecycle Status
Active
RoHS Status
Compliant

Source 103JG1 with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from Littelfuse. Our team supports active, EOL, and hard-to-find component sourcing.

  • Original manufacturer parts with traceability options
  • BOM upload and multi-line RFQ support
  • Package, grade, and compliance verification
Request QuoteView LittelfuseBrowse all base models →

Frequently Asked Questions

Common technical questions about the 103JG1 product family.

103JG1 is a base / family code from Littelfuse. You order a full MPN such as 103JG1F, 103JG1K. The variant table lists 2 orderable lines with different suffixes.
Listed suffix fragments include: F, K. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the Littelfuse datasheet ordering guide — do not guess from pattern alone.
Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.
Full manufacturer MPN (not just 103JG1), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.
Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.