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  1. Home
  2. /Products
  3. /Discrete Semiconductors
  4. /Transistors
  5. /BUL128D-B
BUL128D-B thumbnail 1
STMicroelectronics

BUL128D-B

Category
Transistors
Manufacturer
STMicroelectronicsDetails
RoHS Status
Datasheet
Description
TRANS NPN 400V 4A TO-220.Bipolar (BJT) Transistor NPN 400 V 4 A 70 W Through Hole TO-220
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Quality Control
Authentic & Traceable
Shipping (In-stock)
1-3 business days
Quote Response
Within 24 Hours
Stock Status5920
QuantityBUL128D-B
Country

Get Tiered Pricing (Submit RFQ)

Specification
Documentation
TypeDescriptionTypeDescription
PackagingTubePart StatusObsolete
Manufacturer Lead Time14 WeeksCurrent - Collector (Ic) (Max)4 A
Current - Collector Cutoff (Max)250µADC Current Gain (hFE) (Min) @ Ic, Vce12 @ 2A, 5V
Mounting TypeThrough HoleOperating Temperature150°C (TJ)
Package / CaseTO-220-3Power - Max70 W
Supplier Device PackageTO-220Transistor TypeNPN
Vce Saturation (Max) @ Ib, Ic500mV @ 1A, 4AVoltage - Collector Emitter Breakdown (Max)400 V
ExportControlClassNumberEAR99HtsusCode8541.29.0095
MoistureSensitivityLevel1 (Unlimited)ReachStatusREACH Unaffected
RoHS StatusRoHS Compliant
Certified Quality & Compliance
Purchase & Inquiry
Secure Packaging
Shipping & Availability
Payment

YG GROUP (YUGUANG INTERNATIONAL(HK)CO.,LTD) supports reliable sourcing through quality controls and compliance documentation. Please confirm product requirements, applicable certifications and supporting documents before ordering.

  • 1. Certification Scope: Quality certifications apply only to the entities, sites and activities listed in valid certificates. Management system certification does not certify each individual product.
  • 2. Product Authenticity: Products must match the agreed manufacturer, part number and condition. Supplier screening and authenticity checks help reduce counterfeit risk.
  • 3. Inspection & Testing: The inspection scope follows product risks and agreed requirements. Additional testing, laboratory arrangements, costs and lead times require written confirmation.
  • 4. Traceability & Documentation: Request conformity certificates, traceability records or test reports before ordering. Document availability, issuer and coverage must be confirmed for the offered goods.
  • 5. Environmental Compliance: RoHS and REACH information is based on applicable manufacturer documentation. Confirm the exact part, declaration date and relevant exemptions before ordering.
  • 6. Handling & Protection: Handling, storage and packaging follow applicable product requirements, including ESD and moisture protection where required. Special handling requirements must be agreed before ordering.
ERAI
ISO 9001
ESD Control

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Product FAQ
Purchasing FAQ

What type of component is BUL128D-B, and what package does it use?

BUL128D-B is an authentic electronic component manufactured by STMicroelectronics, categorized under Transistors. It is supplied in the standard manufacturer-specified package footprint, providing industry-standard mechanical dimensions and terminal configurations for board-level assembly. Full pinout configurations, physical footprint drawings, and rated operating tolerances are documented in the official BUL128D-B datasheet above.

Why is pricing for BUL128D-B available via RFQ rather than a fixed checkout price?

Electronic component spot-market pricing for BUL128D-B fluctuates based on real-time global availability, production date codes, minimum order quantities (MOQ), and packaging formats (e.g., Reel, Tube, Tray). Using an RFQ ensures you receive accurate, real-time volume pricing tied to verified, traceable inventory rather than stale catalog estimates.

How quickly can BUL128D-B be shipped once quoted?

Lead times for BUL128D-B depend on whether stock is dispatched from our central hub or regional franchise partners. Ready-to-ship inventory typically leaves the warehouse within 1–3 business days following quality inspection, while factory-direct or back-ordered allocations are confirmed with an estimated ship date upon RFQ reply.

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