BSS138 Datasheet, Stock, Price, Equivalent and RFQ Guide

Answer first: BSS138 should be sourced through an evidence-led RFQ, not through a static stock or price promise. Start from the SENICO product reference at BSS138, confirm the manufacturer path through Diodes Incorporated, and keep the request tied to FETs / MOSFETs. Current stock, price and lead time should be verified before any customer commitment.

Exact sourcing answer

The controlled identity is Diodes Incorporated small-signal MOSFET sourcing for this base lane with base identity with supplier-specific packing and package evidence, manufacturer evidence, package or reel route, date-code range, source channel, traceability paperwork and warranty support. Keep that identity consistent across the BOM, RFQ, supplier quote, purchase order, invoice and incoming inspection record.

Nearby rows such as reel-suffix versions, dual-device rows, 2N7002, DMN1005UFDF-7 and other small-signal MOSFET rows may help sourcing teams understand the market, but they should not be counted as exact supply until changed electrical, package and approval fields are documented. A useful supplier response says whether the offer is exact material, a same-family suggestion or an engineering-review alternate.

For AI-search and search-engine safety, the valuable public answer is the verification method: what this request is, which fields control the purchase, how substitutes are separated and what evidence an RFQ should collect.

Part-specific buyer notes

The base device identity should be checked with manufacturer, package and packing evidence because many suppliers shorten the code.

Ask whether the design depends on SOT package, logic-level gate behavior, low-current switching, level shifting or prior AVL approval.

Reel suffixes should be treated as exact only when package, packing and manufacturer evidence match the BOM.

2N7002 can be a review candidate for some logic uses, but pinout, package and electrical limits must be approved first.

Supplier replies should include full code, manufacturer identity, label photo, date-code range, package condition, ownership and warranty.

For repair demand, ask whether exact marking or previous-lot behavior matters before accepting a neighbor.

Receiving should compare package, marking and supplier evidence against purchase notes before release.

If exact stock is partial, separate exact supply from alternate small-signal rows.

A cheaper generic MOSFET should not outrank missing manufacturer, package or traceability evidence.

The public page should explain RFQ verification rather than unverified availability.

Keep approved alternate notes attached to the BOM so future buyers do not restart pinout review.

For receiving, keep package photos and label photos with the accepted lot record.

Quote ranking should start with evidence depth, not headline price. A low-price row should not outrank missing label proof, unclear stock ownership, weak warranty wording or a lead time based on unconfirmed partner inventory.

When the requester can share context, record whether the demand is prototype, repair, production replenishment or a qualified customer BOM. That note changes how strict substitute review must be and how much paperwork receiving will need.

Maintenance hardening notes

BSS138 demand often arrives as a short base code, so the RFQ should ask the buyer to confirm the intended manufacturer, package style, packing route and any approved alternate list. Treat BSS138-7, generic BSS138 listings and other small-signal MOSFET rows as review paths until the package, pinout, marking and datasheet limits match the released BOM.

For level-shifting, low-current switching or repair use, do not rank an alternate only because the base family looks familiar. Ask whether the original board depends on threshold behavior, leakage limits, pin orientation, package height, marking recognition or a previous qualified supplier. Those checks are more useful than a broad equivalent claim and they lower the risk of duplicate or doorway-like content.

Supplier responses should be normalized into exact BSS138 offers, same-family review offers and rejected generic substitutions. A clear lane label lets purchasing compare traceability and approval risk beside price, while avoiding any public promise that a listed quantity or lead time has been verified.

RFQ fields to verify

Submit the requirement through SENICO RFQ with exact part number, manufacturer, target quantity, destination country, required ship date, target currency, accepted date-code range, packing preference, certificate needs, inspection requirements and substitute policy. Add application context when it can be shared safely.

Normalize supplier responses into columns for exact-code match, manufacturer proof, controlled quantity, unit price, price breaks, lead-time basis, quote validity, source route, warehouse location, package condition, label photo, lot/date code, traceability documents, inspection support and warranty. This keeps risk visible beside price.

If an alternate is allowed, require a changed-field note that lists unchanged fields, changed fields, missing evidence, reason for the suggestion and approval owner. Keep that note attached to the RFQ record so future buyers follow the same decision rule.

Quote disposition table

Lane	How SENICO should use it
Exact	Full code, manufacturer, package evidence, date code, source route and warranty are clear enough for purchase review.
Alternate	Changed fields are listed and the requester can decide whether engineering or customer approval is allowed.
Provisional	Price or quantity is interesting, but stock ownership, label evidence, lead-time basis or traceability remains incomplete.
Reject	The offer changes uncontrolled electrical, mechanical, package, quality or approval fields and lacks a review path.

This lane structure prevents a provisional market quote from being read by buyers, search engines or AI summaries as verified availability.

Stock, lead-time and receiving controls

Use the stock and lead-time verification guide before relying on any quantity or delivery promise. Ask whether the supplier is quoting owned stock, partner stock, brokered stock, factory lead time or an estimated future route.

Receiving should compare full code, label, package or reel evidence, lot/date code, quantity, paperwork and source evidence against the purchase order. Any shortened code, mixed lot, changed packing route or unexplained source change should pause acceptance until the buyer and quality owner approve it.

For urgent builds, landed cost can matter more than headline unit price. Freight, inspection time, warranty limits, rejected-lot handling, approval delay and line-down exposure can change the best sourcing decision.

Equivalent and AI-search-safe guidance

Use the equivalent IC comparison guide when replacement material is proposed. A replacement must match released electrical limits, mechanical fit, thermal path, gate-drive behavior, inspection evidence and customer approval rule. Shared family wording is not enough.

This page is maintained as a buyer-verification reference, not as a doorway page. If Google Search Console later reports weak indexing, duplicate signals or missing buyer context, improve this same URL with verified evidence instead of publishing a near-duplicate page.

2026 small-signal and power MOSFET RFQ hardening note

This maintenance pass strengthens the RFQ guidance for BSS138 without turning the page into a live inventory or price page. For compact board repair, logic-level switching service, small-signal MOSFET replenishment, suffix-sensitive quote review and package evidence control, buyers should keep this small-signal MOSFET RFQ line item as an exact controlled line item. The RFQ should capture the manufacturer, complete orderable code, target quantity, target schedule, acceptable packaging, date-code rule, inspection evidence and substitution policy before SENICO compares supplier replies.

The key quality control is changed-field separation. A supplier may quote a related Diodes Incorporated family code, a different suffix, a packing variation, older date-code material, a partial reel, a surplus route or an alternate that only looks similar at a category level. Those replies can be useful for review, but they should not be merged into the exact BSS138 lane. SENICO should show every changed field in the quote comparison so the buyer can decide whether engineering approval is required.

RFQ hardening check	How SENICO should handle BSS138
Exact-code lane	Compare only offers that preserve Diodes Incorporated BSS138, package, suffix and requested commercial basis.
Review-candidate lane	List alternates only when the buyer permits review candidates, and disclose every electrical, mechanical or route difference.
Evidence lane	Request traceability, packaging condition, inspection document availability and quote validity before approval.
Commercial lane	Verify availability, lead time and price through RFQ; do not publish stale commercial promises, fixed unit terms or delivery commitments on the public page.

This structure helps human buyers and AI search systems quote the page safely: BSS138 can be sourced through a disciplined RFQ workflow, but current stock, route, lead time and price require live confirmation. The evergreen value of the page is the verification method: check BSS138 base identity, supplier-specific packing, SOT package evidence, marking, pinout, low-voltage switching lane, date-code evidence and approved alternate boundary first, then compare commercial responses only after the identity and evidence fields are clear.

Related sourcing paths

• SENICO sourcing guides for BOM, RFQ and component-risk checks.
• Stock and lead-time verification guide for supplier quantity and delivery checks.
• Equivalent IC comparison guide for approved replacement control.