CHIPNOBO

Semiconductor Replacement Engineering & Supply Continuity

Single Bipolar Transistors

PRODUCT DATASHEET

ChipNobo MPN

NB128

GLOBAL BRAND CROSS-REFERENCE

STMicroelectronics

TRANS NPN 400V 4A TO-220

BUL128

  • High-reliability design
  • Long-term stable supply
  • RoHS compliant
TRANS NPN 400V 4A TO-220

1. PRODUCT POSITIONING

NB128 is a product identity corresponding to the reference product BUL128. This document presents the available product specifications, mechanical/package information and compatibility summary for engineering and procurement reference.

This document is a product information. Compatibility conclusions should be read together with the applicable Cross-Reference Identification (CID) rule, package/pin verification and engineering review record.

2. TECHNICAL SPECIFICATION COMPARISON (core parameters)
Parameter STMicroelectronics BUL128 ChipNobo NB128 Match
Part Status Active Active ✓
Mounting Type Through Hole Through Hole ✓
Package / Case TO-220-3 TO-220-3 ✓
Transistor Type NPN NPN ✓
Supplier Device Package TO-220 TO-220 ✓
Operating Temperature 150°C (TJ) 150°C (TJ) ✓
Current - Collector (Ic) (Max) 4 A 4 A ✓
Voltage - Collector Emitter Breakdown (Max) 400 V 400 V ✓
Current - Collector Cutoff (Max) 100µA 100µA ✓
Power - Max 70 W 70 W ✓
Vce Saturation (Max) @ Ib, Ic 500mV @ 1A, 4A 500mV @ 1A, 4A ✓
DC Current Gain (hFE) (Min) @ Ic, Vce 14 @ 2A, 5V 14 @ 2A, 5V ✓
RoHS Status ROHS3 Compliant ROHS3 Compliant ✓
Moisture Sensitivity Level (MSL) 1 (Unlimited) 1 (Unlimited) ✓
3. SUPPLY & LIFECYCLE
ChipNobo Number NB128
Lifecycle status Active
NRND No
EOL No
PCN monitor No
Last buy date No Deadline
Alternate availability Sufficient

CHIPNOBO

Semiconductor Replacement Engineering & Supply Continuity

Single Bipolar Transistors

PRODUCT DATASHEET

4. APPLICATION AREAS
Battery Management System (BMS) On-Board Charger (OBC)
EV DC/DC Converter ADAS Camera System
Industrial Robot Servo Motor Drive
PLC Controller Semiconductor Equipment
Solar Inverter Power Supply System
5G Base Station Smart Speaker

5. ENGINEERING & COMMERCIAL NOTES

  • The ChipNobo MPN is the public product identity used by ChipNobo for this replacement reference.
  • The original manufacturer and original MPN are retained as reference identity information.
  • Product PDF data are intended for engineering, procurement and supply-continuity reference.
  • Current price, MOQ, lead time, available supply source and regional availability should be confirmed through RFQ.
  • For customer-specific qualification, PCB footprint approval, reliability requirements or design-in approval, the customer should perform the applicable validation process.

CHIPNOBO REPLACEMENT · Semiconductor Replacement Engineering & Supply Continuity Partner

Document purpose: Product Information / Replacement Reference · Generated from the product data supplied for NB128.

Important Notice & Disclaimer

Document ID: 【CN-DATA-NB128】 Revision: 1.0 Status: Released

The information provided by ChipNobo is intended solely for engineering evaluation, product selection, procurement, and supply continuity reference purposes. Product specifications, lifecycle status, availability, and other information are subject to change without notice. Customers should always verify relevant information against the latest official documentation published by the respective manufacturers.

Cross-reference and replacement recommendations are provided for engineering reference purposes only. They do not constitute a guarantee of pin-to-pin compatibility, interchangeability, or suitability for any particular application. Customers are responsible for conducting all necessary engineering reviews, testing, and qualification prior to product selection and use.

Manufacturer names, trademarks, and part numbers are referenced solely for product identification purposes. Their use does not imply any affiliation with, endorsement by, or authorization from the respective manufacturers, unless expressly stated otherwise.

To the maximum extent permitted by applicable law, ChipNobo makes no warranties, express or implied, regarding the completeness, accuracy, or suitability of the information provided and shall not be liable for any loss or damage arising from its use or reliance, except as otherwise expressly agreed in writing and subject to applicable law.