Littelfuse SMD1812P

SMD1812P variants from Littelfuse

SMD1812P Datasheet

Variants

Mfr

Littelfuse

Lifecycle

Active

SMD1812P Overview

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

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
6 distinct suffix patternsExamples: 014TF, 020TF, 050TF/30, 075TF/33, 110TF/33 (+1 more). Decode suffix meaning in the ordering notes under the variant table.

Target Applications

Microcontrollers — 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 6 SMD1812P part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.

Part Number	Description	Manufacturer	Lifecycle	RoHS	Availability	Action
SMD1812P014TF	PTC Resettable Fuse 0.14A(hold) 0.34A(trip) 60VDC 10A 0.8W 0.15s 1.5Ohm SMD Solder Pad 1812	Littelfuse	Active	Compliant	In Stock	RFQ
SMD1812P020TF	PTC Resettable Fuse 0.2A(hold) 0.4A(trip) 30VDC 10A 0.8W 0.02s 0.8Ohm SMD Solder Pad 1812	Littelfuse	Active	Compliant	In Stock	RFQ
SMD1812P050TF/30	Circuit Protection--PTC Resettable Fuses	Littelfuse	Active	Compliant	In Stock	RFQ
SMD1812P075TF/33	PTC Resettable Fuse 0.75A(hold) 1.5A(trip) 33VDC 20A 0.8W 0.2s 0.11Ohm SMD Solder Pad 1812	Littelfuse	Active	Compliant	In Stock	RFQ
SMD1812P110TF/33	PTC Resettable Fuse 1.1A(hold) 1.95A(trip) 33VDC 20A 0.8W 0.5s 0.06Ohm SMD Solder Pad 1812	Littelfuse	Active	Compliant	In Stock	RFQ
SMD1812P150TF/24	PTC Resettable Fuse 1.5A(hold) 3A(trip) 24VDC 20A 0.8W 1.5s 0.04Ohm SMD Solder Pad 1812	Littelfuse	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on SMD1812P map to package, grade, and reel options.

How to Choose the Right SMD1812P Microcontrollers

📦

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 SMD1812P, 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 "SMD1812P" — include the full suffix (e.g. 014TF, 020TF, 050TF/30). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for SMD1812P product family

Identity

Base Model

SMD1812P

Manufacturer

Littelfuse

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source SMD1812P with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 6 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 Quote View Littelfuse Browse all base models →

Frequently Asked Questions

Common technical questions about the SMD1812P product family.

Is SMD1812P a single part I can order, or a family prefix?

SMD1812P is a base / family code from Littelfuse. You order a full MPN such as SMD1812P014TF, SMD1812P020TF, SMD1812P050TF/30. The variant table lists 6 orderable lines with different suffixes.

What do the suffix letters on SMD1812P part numbers mean?

Listed suffix fragments include: 014TF, 020TF, 050TF/30, 075TF/33, 110TF/33, 150TF/24. 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.

What is the lifecycle status of SMD1812P variants?

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.

What should I send for an RFQ on SMD1812P?

Full manufacturer MPN (not just SMD1812P), 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.

Where is the SMD1812P datasheet?

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.