• • • • FM540-AHST-H

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We source brand-new parts via original manufacturers, franchised distributors or verified independent channels, with incoming inspection. Channel type is confirmed on your quote.

Contact sales or email [email protected] with MPN and quantity. We reply with stock, ETA and reference pricing — confirm before PO.

Reference price and stock shown as of 2026-09-20. Confirm live availability and unit price via RFQ before placing a PO.

FM540-AHST-H

SCHOKTTY DIODE 5A 40V

Formosa Microsemi Co. Ltd. · Diodes - Rectifiers - Single · BOM Matching

Mfr. Part Number

FM540-AHST-H

Manufacturer

Formosa Microsemi Co. Ltd.

Package / Case

DO-221BC, SMA Flat Leads

Datasheet

Description

SCHOKTTY DIODE 5A 40V

RoHS Status

Lead Free / RoHS Complaint

Availability

Sourcing — Lead time quoted on request (often 3–15 business days by channel)

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FM540-AHST-H

Formosa Microsemi Co. Ltd.

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Reference Price

Quantity	Price

Prices are for reference only. The final transaction is subject to confirmation.

As of 2026-09-20 · Valid as reference until 2026-09-27 · Request RFQ for live stock.

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Specification Summary

Package / Case

DO-221BC, SMA Flat Leads

Supplier Device Package

SMA-HST

Voltage - DC Reverse (Vr) (Max)

40 V

Voltage - Forward (Vf) (Max) @ If

550 mV @ 5 A

Current - Average Rectified (Io)

5A

Current - Reverse Leakage @ Vr

100 µA @ 40 V

Operating Temperature - Junction

-55°C ~ 125°C

Mounting Type

Surface Mount

Full specifications are listed below. Need alternates or BOM matching? Read BOM guide · Request a quote

Stock status: Sourcing — Lead time quoted on request (often 3–15 business days by channel)

Shortage / allocation / EOL lines may need longer — ask via RFQ.

Reference price and stock shown as of 2026-09-20. Confirm live availability and unit price via RFQ before placing a PO.

Lead time FAQ Authenticity FAQ MOQ FAQ

Specifications

Product Description

Purchase & Inquiry

Mounting Type

Surface Mount

Capacitance @ Vr, F

270pF @ 4V, 1MHz

Current - Average Rectified (Io)

5A

Current - Reverse Leakage @ Vr

100 µA @ 40 V

Diode Type

Schottky

Operating Temperature - Junction

-55°C ~ 125°C

Reverse Recovery Time (trr)

-

Voltage - DC Reverse (Vr) (Max)

40 V

Voltage - Forward (Vf) (Max) @ If

550 mV @ 5 A

Speed

Fast Recovery =< 500ns, > 200mA (Io)

Supplier Device Package

SMA-HST

Package / Case

DO-221BC, SMA Flat Leads

SCHOKTTY DIODE 5A 40V

Brand Introduction

Formosa Microsemi is a specialist maker in discrete components including switching diodes, fast diodes, Zener diodes, Schottky diodes, TVS (surge absorbers) and ESD (anti-static components), bridge type Rectifier, MOSFET, Transistor, and more. They have products patented in the United States, China, Japan, and Taiwan for a wide range of applications in aerospace, automotive, Netcom, 5G, 3C, AI smart, mobile phones, wearable devices, panels, power supplies, and more.

Mounting Type

Surface Mount

Capacitance @ Vr, F

270pF @ 4V, 1MHz

Current - Average Rectified (Io)

5A

Current - Reverse Leakage @ Vr

100 µA @ 40 V

Diode Type

Schottky

Operating Temperature - Junction

-55°C ~ 125°C

Reverse Recovery Time (trr)

-

Voltage - DC Reverse (Vr) (Max)

40 V

Voltage - Forward (Vf) (Max) @ If

550 mV @ 5 A

Speed

Fast Recovery =< 500ns, > 200mA (Io)

Supplier Device Package

SMA-HST

Package / Case

DO-221BC, SMA Flat Leads

SCHOKTTY DIODE 5A 40V

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Buying FAQ — FM540-AHST-H

How do I buy FM540-AHST-H from Yingxinyuan?

Open RFQ with quantity and target date, or upload a BOM that includes FM540-AHST-H. We reply with stock, channel note, reference price and ETA.

Is the listed price final?

Prices on the product page are reference only. Confirm unit price, currency and validity via RFQ before placing a PO.

How fresh is the stock figure?

Stock and reference price show an as-of date on the page. Ask for a live confirm — allocation lines can change daily.

How do you source authentic parts?

We source from manufacturers, franchised distributors and verified independents, then inspect incoming lots. See /anti-counterfeit/.

What is a typical lead time?

In-stock lines often ship within 24–48 hours after confirmation. Sourcing / allocation ETAs are quoted per line — see /lead-time-shipping/.

BOM matching · Anti-counterfeit · Lead time & shipping

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FM540-AHST-H

Specification Summary

Related Parts

Buying FAQ — FM540-AHST-H

How do I buy FM540-AHST-H from Yingxinyuan?

Is the listed price final?

How fresh is the stock figure?

How do you source authentic parts?

What is a typical lead time?

Explore by Brand, Category & Application