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

onsemi FJPF5021OTU

Name: FJPF5021OTU
Brand: onsemi
SKU: FJPF5021OTU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FJPF5021OTU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3 Full Pack

Datasheet:: FJPF5021OTU.pdf

Description:: TRANS NPN 500V 5A TO-220F-3

Quantity:: RFQ Add To RFQ list

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Inventory:6,028

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Product details

Overview

FJPF5021OTU from onsemi is an NPN silicon power transistor in TO-220 Fullpack package, rated for 500 V V_CEO, 5 A continuous collector current, and 40 W power dissipation at T_C = 25°C; designed for high-voltage switching in industrial motor drives and AC-DC power supplies.

For engineers reviewing the FJPF5021OTU datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) robustness, 0.1 µs typical fall time, 15 MHz f_T, and high-voltage breakdown performance under clamped inductive switching conditions.

Technical Context

This device employs a planar epitaxial base structure optimized for high-voltage blocking and fast switching, with specified V_CEX(sus) = 500 V under clamped inductive turn-off (I_C = 2.5 A, I_B1 = −I_B2 = 1 A, L = 1 mH). Its SOA curve supports both DC and pulsed operation up to 10 A peak.

Electrical characterization confirms h_FE ≥ 15 at I_C = 0.6 A and ≥ 8 at I_C = 3 A, with V_CE(sat) ≤ 1 V and V_BE(sat) ≤ 1.5 V under I_C = 3 A / I_B = 0.6 A drive - enabling efficient gate driver interface in hard-switched topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	500 V - supports primary-side switching in offline SMPS up to 400 V DC bus with margin
I_C (DC)	5 A - enables continuous conduction mode operation in 200–300 W power stages
P_C @ T_C=25°C	40 W - requires heatsink with θ_JA ≤ 3.1°C/W for full-power operation
t_F (typ)	0.1 µs - reduces switching losses in 20–100 kHz hard-switched converters
f_T	15 MHz - ensures sufficient gain margin for stable base-driven control loops
C_ob	80 pF - limits Miller charge and improves dv/dt immunity in high-side configurations

Pinout & Package

TO-220 Fullpack (Case 221AT), 3-lead, isolated tab; mechanical outline conforms to JEDEC TO-220F-3SG standard with electrically isolated collector tab.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input	Receives base current to saturate or cut off; requires 0.6 A drive for full 3 A conduction
2 (Collector)	High-voltage output node	Connected to heatsink via isolated tab; handles 500 V blocking and 10 A pulse current
3 (Emitter)	Reference return path	Serves as common emitter node; low-inductance layout critical for fast switching integrity

Key Features

Feature	Design Value
Wide Forward Bias SOA	Supports simultaneous 500 V / 5 A operation without second breakdown, enabling robust linear-mode use
Clamped Inductive Switching Rating	V_CEX(sus) = 500 V confirmed with 1 mH load and bipolar base drive - eliminates need for external snubbers
High h_FE at Medium Current	h_FE ≥ 15 at I_C = 0.6 A ensures reliable saturation with low-base-drive power loss
Pb-Free Construction	Meets RoHS Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes

Applications

Industrial Motor Drives	AC-DC Power Supplies
Use Scenario: Single-phase inverter stage driving 1/2 HP induction motors in HVAC blowers and pumps. IC Role / Device Role / Timing Role: High-voltage NPN switch controlling motor phase current in 6–20 kHz PWM inverters. Use Value: Wide SOA and 500 V rating allow direct replacement of legacy 400 V devices without derating or redesign.	Use Scenario: Primary-side switching transistor in 250 W universal-input flyback and forward converters. IC Role / Device Role / Timing Role: Main power switch handling 375 V DC link voltage with clamped inductive turn-off stress. Use Value: Verified V_CEX(sus) = 500 V eliminates need for RCD snubber, reducing component count and EMI.
Welding Equipment	Induction Heating Controls
Use Scenario: Output stage in IGBT-gated SCR-based welder main inverter with 100–500 µs pulse widths. IC Role / Device Role / Timing Role: Fast-switching NPN used in base drive circuits and auxiliary power switches. Use Value: 0.1 µs t_F minimizes dead-time losses during high-frequency burst-mode welding cycles.	Use Scenario: Resonant half-bridge switch in 20–50 kHz solid-state induction heaters for metal hardening. IC Role / Device Role / Timing Role: High-reliability switching element handling repetitive 500 V / 5 A pulses with minimal thermal cycling stress. Use Value: 150°C max junction temperature and 40 W dissipation support sustained duty-cycle operation with forced-air cooling.

Industrial Motor Drives

AC-DC Power Supplies

Use Scenario: Single-phase inverter stage driving 1/2 HP induction motors in HVAC blowers and pumps.

IC Role / Device Role / Timing Role: High-voltage NPN switch controlling motor phase current in 6–20 kHz PWM inverters.

Use Value: Wide SOA and 500 V rating allow direct replacement of legacy 400 V devices without derating or redesign.

Use Scenario: Primary-side switching transistor in 250 W universal-input flyback and forward converters.

IC Role / Device Role / Timing Role: Main power switch handling 375 V DC link voltage with clamped inductive turn-off stress.

Use Value: Verified V_CEX(sus) = 500 V eliminates need for RCD snubber, reducing component count and EMI.

Welding Equipment

Induction Heating Controls

Use Scenario: Output stage in IGBT-gated SCR-based welder main inverter with 100–500 µs pulse widths.

IC Role / Device Role / Timing Role: Fast-switching NPN used in base drive circuits and auxiliary power switches.

Use Value: 0.1 µs t_F minimizes dead-time losses during high-frequency burst-mode welding cycles.

Use Scenario: Resonant half-bridge switch in 20–50 kHz solid-state induction heaters for metal hardening.

IC Role / Device Role / Timing Role: High-reliability switching element handling repetitive 500 V / 5 A pulses with minimal thermal cycling stress.

Use Value: 150°C max junction temperature and 40 W dissipation support sustained duty-cycle operation with forced-air cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage switching transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST13007D	V_CEO = 400 V, I_C = 8 A, P_C = 60 W, t_F = 0.2 µs (typ)	Limited to 350 V DC bus designs; higher current but lower voltage margin	Select when higher continuous current and thermal headroom outweigh 100 V voltage deficit
MJD127G	V_CEO = 100 V, I_C = 10 A, P_C = 50 W, TO-220AB package	Not suitable for >150 V applications; intended for low-voltage, high-current linear/switching use	Only applicable in secondary-side or low-voltage DC-DC stages - not a functional substitute

Compared with ST13007D and MJD127G, the FJPF5021OTU uniquely delivers 500 V blocking capability with verified clamped inductive switching performance, making it the only viable option among the three for universal-input offline power conversion above 375 V DC.

Availability

FJPF5021OTU is available at Aetrix Electronics and suitable for industrial motor drives, AC-DC power supplies, welding equipment, and induction heating controls requiring stable component supply and long-term manufacturing continuity.

Supply support for FJPF5021OTU 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The FJPF5021OTU belongs to onsemi's high-voltage bipolar power transistor product line, engineered specifically for ruggedized switching in industrial power conversion where reliability under voltage transients and wide SOA are critical.

FAQ

What is the maximum continuous collector current rating for FJPF5021OTU?

The FJPF5021OTU has a maximum continuous collector current (I_C) rating of 5 A at case temperature T_C = 25°C. Derating is required above this temperature per the power derating curve in Figure 8 of the datasheet, with zero dissipation at 150°C junction temperature. The device also supports 10 A pulsed collector current (I_CP) under specified test conditions.

Does FJPF5021OTU have a built-in base-emitter resistor or integrated protection features?

No, the FJPF5021OTU is a discrete NPN bipolar junction transistor without any integrated resistors, diodes, or protection circuitry. It requires external base drive components including current-limiting resistors and optional Baker clamp or anti-saturation networks. All protection - such as overvoltage clamping and thermal monitoring - must be implemented externally in the application circuit.

Is FJPF5021OTU suitable for use in Class D audio amplifier output stages?

The FJPF5021OTU is not recommended for Class D audio amplifier output stages due to its relatively high V_CE(sat) (≤1 V) and limited f_T (15 MHz), which restrict efficiency and bandwidth in high-fidelity, high-frequency switching audio applications. Devices with lower saturation voltage, faster switching, and optimized SOA for capacitive loads are preferred for that use case.

What is the meaning of the 'O' suffix in FJPF5021OTU's part number?

The 'O' in FJPF5021OTU denotes the h_FE grade classification per the datasheet's h_FE Classification table: 'O' corresponds to h_FE1 = 20–40 at V_CE = 5 V and I_C = 0.6 A. This grading ensures predictable DC current gain for consistent base drive design across production lots of the FJPF5021OTU.

Can FJPF5021OTU be mounted directly to a heatsink without electrical isolation?

No - although the TO-220 Fullpack package features an electrically isolated collector tab, the FJPF5021OTU's collector is internally connected to the metal tab. Mounting must use an insulating washer or pad if the heatsink is grounded or at a different potential than the collector node. Failure to isolate may cause short-circuit failure or system-level ground loop issues.

FJPF5021OTU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Active

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 500 V

Vce Saturation (Max) @ Ib, Ic:: 1V @ 600mA, 3A

Current - Collector Cutoff (Max):: 10µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 20 @ 600mA, 5V

Power - Max:: 40 W

Frequency - Transition:: 15MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220F-3

FJPF5021OTU FAQ

1.How can I place an order for FJPF5021OTU through Aetrix?

Please submit a Request for Quotation (RFQ) for FJPF5021OTU 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 FJPF5021OTU reliable?

The price and inventory of FJPF5021OTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FJPF5021OTU is usually 5 days.

3.What payment methods are accepted for FJPF5021OTU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FJPF5021OTU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FJPF5021OTU?

FJPF5021OTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FJPF5021OTU 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 FJPF5021OTU?

For technical support, including FJPF5021OTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FJPF5021OTU requirements.

6.How does Aetrix verify that FJPF5021OTU is sourced from the original manufacturer or authorized distributors?

All FJPF5021OTU 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 FJPF5021OTU meets industry standards.

7.What is the process for return or replacement of FJPF5021OTU?

All FJPF5021OTU units undergo pre-shipment inspection (PSI). If there is an issue with FJPF5021OTU, 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 FJPF5021OTU part is unused and in its original packaging.

Return procedure for FJPF5021OTU:

1.Submit a request within 90 days.

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

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