onsemi MMSZ5242BT

MMSZ5242BT variants from onsemi

MMSZ5242BT Datasheet

Variants

Mfr

onsemi

Lifecycle

Active

MMSZ5242BT Overview

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

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
2 distinct suffix patternsExamples: 1G, 3G. Decode suffix meaning in the ordering notes under the variant table.

Target Applications

Zener Diodes — 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 MMSZ5242BT 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
MMSZ5242BT1G	Zener Diode Single 12V 5% 30Ohm 500mW 2-Pin SOD-123 T/R	onsemi	Active	Compliant	In Stock	RFQ
MMSZ5242BT3G	Zener Diode 500 mW SOD-123, SOD-123 2 LEAD, 10000-REEL	onsemi	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on MMSZ5242BT map to package, grade, and reel options.

How to Choose the Right MMSZ5242BT Zener Diodes

📦

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 MMSZ5242BT, 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 "MMSZ5242BT" — include the full suffix (e.g. 1G, 3G). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for MMSZ5242BT product family

Identity

Base Model

MMSZ5242BT

Manufacturer

onsemi

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source MMSZ5242BT with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 2 ordering variants from onsemi. 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 onsemi Browse all base models →

Frequently Asked Questions

Common technical questions about the MMSZ5242BT product family.

Is MMSZ5242BT a single part I can order, or a family prefix?

MMSZ5242BT is a base / family code from onsemi. You order a full MPN such as MMSZ5242BT1G, MMSZ5242BT3G. The variant table lists 2 orderable lines with different suffixes.

What do the suffix letters on MMSZ5242BT part numbers mean?

Listed suffix fragments include: 1G, 3G. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the onsemi datasheet ordering guide — do not guess from pattern alone.

What is the lifecycle status of MMSZ5242BT 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 MMSZ5242BT?

Full manufacturer MPN (not just MMSZ5242BT), 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 MMSZ5242BT 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.