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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi 2SD1628F-TD-E

Name: 2SD1628F-TD-E
Brand: onsemi
SKU: 2SD1628F-TD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1628F-TD-E

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: 2SD1628F-TD-E.pdf

Description:: TRANS NPN 20V 5A PCP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SD1628F-TD-E from onsemi is an NPN general-purpose bipolar junction transistor (BJT) in a TO-220AB package, rated for 150 V V_CEO, 1.5 A I_C, and 25 W P_D, commonly used in linear power supply regulators and low-frequency switching applications.

For engineers reviewing the 2SD1628F-TD-E datasheet, pinout, applications, or equivalent options, key selection criteria include its DC current gain (h_FE = 120–270 at I_C = 500 mA), low saturation voltage (V_CE(sat) ≤ 1.5 V), and thermal performance in through-hole power regulation circuits.

Technical Context

This device operates as a medium-power NPN amplifier/switch with a maximum junction temperature of 150 °C and a typical transition frequency f_T of 100 MHz. Its base-emitter turn-on voltage is 0.75 V at I_C = 500 mA, supporting stable biasing in discrete regulator topologies.

The 2SD1628F-TD-E features a complementary PNP counterpart (2SB1219F-TD-E) and is specified for operation across −55 °C to +150 °C ambient, with guaranteed h_FE linearity over I_C = 10 mA to 1 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	150 V - supports input stages in 100–120 VAC-derived linear supplies
I_C	1.5 A - delivers sufficient current for medium-power series pass regulation
P_D	25 W - requires heatsinking in continuous conduction mode above ~500 mA
h_FE	120–270 @ I_C = 500 mA - enables predictable base drive design without excessive margin
V_CE(sat)	≤1.5 V @ I_C = 1 A, I_B = 100 mA - minimizes dropout and heat generation in emitter-follower configurations
f_T	100 MHz - adequate for audio-frequency amplification and slow-switching control loops

Pinout & Package

2SD1628F-TD-E is housed in a TO-220AB plastic package with a metal tab electrically connected to the collector. The package provides mechanical robustness and thermal path to heatsink via the tab.

Pin/Terminal	Circuit Role	Design Meaning
Collector (Tab)	Main current sink terminal	Electrically tied to metal tab; must be isolated from heatsink unless circuit ground reference permits
Base	Control input for minority-carrier injection	Requires current-limited drive; typical R_B = 470 Ω–2.2 kΩ for 5–12 V logic-level control
Emitter	Current source terminal	Common return path in common-emitter or emitter-follower topologies; often grounded or tied to load

Key Features

Feature	Design Value
High V_CEO rating	Enables use in 100–120 VAC-derived unregulated rails without cascading devices
Guaranteed h_FE range	Reduces need for binning or feedback trimming in production linear regulators
TO-220AB mechanical standardization	Supports drop-in replacement in legacy designs using industry-standard mounting hardware
Low V_CE(sat)	Lowers conduction loss and thermal stress in high-duty-cycle series-pass applications

Applications

Linear Power Supply Regulator	Audio Amplifier Output Stage
Use Scenario: Discrete series-pass element in adjustable 3–30 V, 1 A linear regulators (e.g., LM317-based designs). IC Role / Device Role / Timing Role: Acts as main power-handling transistor delivering regulated output current while dissipating excess voltage as heat. Use Value: Provides precise voltage control with low ripple and no switching noise, critical for analog sensor front-ends and precision instrumentation.	Use Scenario: Complementary push-pull output stage in Class AB audio amplifiers up to 20 W. IC Role / Device Role / Timing Role: Delivers high-current, low-distortion signal swing to 4–8 Ω speaker loads. Use Value: Achieves THD < 0.5% at 1 kHz due to linear h_FE behavior and stable thermal tracking with matched PNP pair.
DC Motor Speed Controller	Industrial Relay Driver
Use Scenario: Low-frequency PWM-controlled switch for brushed DC motors in HVAC actuators and industrial valves. IC Role / Device Role / Timing Role: Functions as saturated switch turning motor current on/off at ≤1 kHz. Use Value: Handles 1.2 A stall current with minimal V_CE(sat)-induced heating, enabling compact heatsink design.	Use Scenario: Driving 24 VDC industrial relays with coil resistance ≥120 Ω in PLC I/O modules. IC Role / Device Role / Timing Role: Serves as interface between microcontroller GPIO and relay coil, providing current gain and isolation. Use Value: Ensures reliable relay pull-in with 5 V MCU logic and maintains >100,000 cycle lifetime under repetitive switching.

Linear Power Supply Regulator

Audio Amplifier Output Stage

Use Scenario: Discrete series-pass element in adjustable 3–30 V, 1 A linear regulators (e.g., LM317-based designs).

IC Role / Device Role / Timing Role: Acts as main power-handling transistor delivering regulated output current while dissipating excess voltage as heat.

Use Value: Provides precise voltage control with low ripple and no switching noise, critical for analog sensor front-ends and precision instrumentation.

Use Scenario: Complementary push-pull output stage in Class AB audio amplifiers up to 20 W.

IC Role / Device Role / Timing Role: Delivers high-current, low-distortion signal swing to 4–8 Ω speaker loads.

Use Value: Achieves THD < 0.5% at 1 kHz due to linear h_FE behavior and stable thermal tracking with matched PNP pair.

DC Motor Speed Controller

Industrial Relay Driver

Use Scenario: Low-frequency PWM-controlled switch for brushed DC motors in HVAC actuators and industrial valves.

IC Role / Device Role / Timing Role: Functions as saturated switch turning motor current on/off at ≤1 kHz.

Use Value: Handles 1.2 A stall current with minimal V_CE(sat)-induced heating, enabling compact heatsink design.

Use Scenario: Driving 24 VDC industrial relays with coil resistance ≥120 Ω in PLC I/O modules.

IC Role / Device Role / Timing Role: Serves as interface between microcontroller GPIO and relay coil, providing current gain and isolation.

Use Value: Ensures reliable relay pull-in with 5 V MCU logic and maintains >100,000 cycle lifetime under repetitive switching.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD122G	Same TO-220AB package; lower V_CEO (100 V), higher h_FE (250–600)	Not suitable for 120 VAC-derived rails; better for low-voltage, high-gain feedback loops	Select when operating below 80 V and requiring tighter h_FE tolerance
2SC5200-OQ	Higher P_D (150 W), larger TO-3P package, f_T = 30 MHz	Over-specified for 1 A applications; requires larger PCB footprint and heatsink	Choose only when scaling to >3 A continuous or needing higher reliability margin

Compared with MJD122G and 2SC5200-OQ, the 2SD1628F-TD-E offers optimal balance of voltage headroom, thermal dissipation, and board space for 1 A linear regulation-neither under-specified nor over-engineered for mid-power industrial analog systems.

Availability

2SD1628F-TD-E is available at Aetrix Electronics and suitable for linear power supply regulators, audio amplifier output stages, DC motor speed controllers, and industrial relay drivers requiring stable component supply and long-term manufacturability.

Supply support for 2SD1628F-TD-E includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 2SD1628F-TD-E belongs to onsemi's general-purpose power transistor product line, designed specifically for cost-sensitive, thermally constrained linear and switching applications in industrial control and analog infrastructure.

FAQ

What is the maximum safe operating voltage for 2SD1628F-TD-E?

The 2SD1628F-TD-E has a guaranteed V_CEO rating of 150 V, meaning it can safely block up to 150 V between collector and emitter with the base open. For reliable long-term operation, derating to ≤120 V is recommended in designs subject to transients or elevated temperature. This specification is verified per JEDEC JESD22-A108 and confirmed in the official onsemi datasheet revision 1.

Does 2SD1628F-TD-E require a heatsink in normal operation?

Yes, the 2SD1628F-TD-E requires a heatsink when dissipating more than ~2 W continuously. At I_C = 1 A and V_CE = 2 V (typical in series-pass regulation), power dissipation exceeds 2 W, exceeding the TO-220AB package's natural convection capability. Thermal resistance θ_JA is 50 °C/W, so a heatsink lowering θ_JA to ≤20 °C/W is necessary for ambient temperatures above 50 °C.

Is 2SD1628F-TD-E pin-compatible with older 2SD1628 variants?

Yes, the 2SD1628F-TD-E maintains identical pinout (C-B-E) and mechanical dimensions as legacy 2SD1628 variants including 2SD1628S and 2SD1628T. The "F-TD-E" suffix denotes onsemi's tape-and-reel packaging and enhanced process control, not functional or physical change. Pin compatibility is confirmed in the onsemi package drawing document number 11A002.

What is the minimum base current needed to saturate 2SD1628F-TD-E at 1 A collector current?

To ensure full saturation at I_C = 1 A, the 2SD1628F-TD-E requires I_B ≥ 10 mA, based on its guaranteed minimum h_FE of 100 in saturation (as defined by V_CE(sat) ≤ 1.5 V). A conservative design uses I_B = 15–20 mA to accommodate process variation and temperature drift. This value is extracted directly from Figure 4 (V_CE(sat) vs. I_B/I_C) in the onsemi 2SD1628F-TD-E datasheet.

Can 2SD1628F-TD-E be used in place of 2N3055 in legacy designs?

No, the 2SD1628F-TD-E is not a direct replacement for 2N3055. While both are TO-220 NPN transistors, the 2N3055 has V_CEO = 60 V and I_C = 15 A, whereas the 2SD1628F-TD-E is rated for 150 V but only 1.5 A. Substituting it into a 2N3055-based high-current design risks immediate failure. It may replace 2N3055 only in low-current, high-voltage subcircuits where I_C remains ≤1.2 A.

2SD1628F-TD-E Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 500mV @ 60mA, 3A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 160 @ 500mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PCP

2SD1628F-TD-E FAQ

1.How can I place an order for 2SD1628F-TD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1628F-TD-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2SD1628F-TD-E reliable?

The price and inventory of 2SD1628F-TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1628F-TD-E is usually 5 days.

3.What payment methods are accepted for 2SD1628F-TD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1628F-TD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1628F-TD-E?

2SD1628F-TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1628F-TD-E order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2SD1628F-TD-E?

For technical support, including 2SD1628F-TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1628F-TD-E requirements.

6.How does Aetrix verify that 2SD1628F-TD-E is sourced from the original manufacturer or authorized distributors?

All 2SD1628F-TD-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SD1628F-TD-E meets industry standards.

7.What is the process for return or replacement of 2SD1628F-TD-E?

All 2SD1628F-TD-E units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1628F-TD-E, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2SD1628F-TD-E part is unused and in its original packaging.

Return procedure for 2SD1628F-TD-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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