ROHM RB521SM

RB521SM variants from ROHM

RB521SM Datasheet

Variants

Mfr

ROHM

Lifecycle

Active

RB521SM Overview

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

Key Features

Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
5 distinct suffix patternsExamples: 30T2R, 40FHT2R, 40T2R, 60FHT2R, 60T2R. Decode suffix meaning in the ordering notes under the variant table.

Target Applications

Rectifier 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 5 RB521SM 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
RB521SM-30T2R	DIODE SCHOTTKY 30V 200MA EMD2	ROHM	Active	Compliant	In Stock	RFQ
RB521SM-40FHT2R	DIODE SCHOTTKY 40V 200MA EMD2	ROHM	Active	Compliant	In Stock	RFQ
RB521SM-40T2R	DIODE SCHOTTKY 40V 200MA EMD2	ROHM	Active	Compliant	In Stock	RFQ
RB521SM-60FHT2R	DIODE SCHOTTKY 60V 200MA EMD2	ROHM	Active	Compliant	In Stock	RFQ
RB521SM-60T2R	DIODE SCHOTTKY 60V 200MA EMD2	ROHM	Active	Compliant	In Stock	RFQ

Ordering Code Differences

How suffixes on RB521SM map to package, grade, and reel options.

How to Choose the Right RB521SM Rectifier 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 RB521SM, 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 "RB521SM" — include the full suffix (e.g. 30T2R, 40FHT2R, 40T2R). RFQ with reel/tube preference and required date code.

Technical Specifications

Core parameters for RB521SM product family

Identity

Base Model

RB521SM

Manufacturer

ROHM

Listed Variants

Variant Parameters

Lifecycle Status

Active

RoHS Status

Compliant

Source RB521SM with Octatronics

Request stock confirmation, lead time, date code, and pricing for all 5 ordering variants from ROHM. 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 ROHM Browse all base models →

Frequently Asked Questions

Common technical questions about the RB521SM product family.

Is RB521SM a single part I can order, or a family prefix?

RB521SM is a base / family code from ROHM. You order a full MPN such as RB521SM-30T2R, RB521SM-40FHT2R, RB521SM-40T2R. The variant table lists 5 orderable lines with different suffixes.

What do the suffix letters on RB521SM part numbers mean?

Listed suffix fragments include: 30T2R, 40FHT2R, 40T2R, 60FHT2R, 60T2R. Typically they encode package (see Package column), temperature grade, and tape/reel option. Always decode on the ROHM datasheet ordering guide — do not guess from pattern alone.

What is the lifecycle status of RB521SM 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 RB521SM?

Full manufacturer MPN (not just RB521SM), 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 RB521SM 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.