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

onsemi AML2002

Name: AML2002
Brand: onsemi
SKU: AML2002
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AML2002

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: AML2002.pdf

Description:: TRANS NPN 200V 0.7A TO-126ML

Quantity:: RFQ Add To RFQ list

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Inventory:11,400

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Product details

Overview

AML2002 from onsemi is a low-saturation-voltage NPN bipolar transistor in TO-126ML package, rated for 200 V V_CEO, 0.7 A I_C, and 125 mV typical V_CE(sat) at I_C = 0.35 A. It delivers high-speed switching (t_f = 70 ns typ.) and high DC current gain (h_FE = 200–560), suited for industrial power control and relay drivers.

For engineers reviewing the AML2002 datasheet, pinout, applications, or equivalent options, key selection criteria include its low V_CE(sat), plastic-covered heat sink enabling insulator-free mounting, TO-126ML thermal performance (10 W at T_c = 25°C), and verified 120 MHz f_T for medium-frequency switching.

Technical Context

The AML2002 operates as a single NPN switching transistor with fixed emitter-collector-base terminal assignment (Pin 1 = E, Pin 2 = C, Pin 3 = B). Its design emphasizes low conduction loss and fast turn-off via optimized base charge removal, evidenced by t_f = 70 ns and t_stg = 2 μs under specified test conditions.

It supports continuous operation up to T_j = 150°C with derated dissipation above T_a = 25°C (1.5 W) or T_c = 25°C (10 W), and features V_(BR)CEO = 200 V and V_(BR)CBO = 220 V - confirming robust voltage blocking in open-base and open-emitter configurations.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	200 V - Maximum collector-to-emitter voltage before breakdown under open-base condition; defines safe operating voltage ceiling in switch-mode applications.
I_C	0.7 A - Continuous collector current rating; sets maximum steady-state load current without thermal runaway at T_c ≤ 25°C.
V_CE(sat)	125 mV typ. @ I_C = 0.35 A - Low saturation voltage minimizes conduction loss and self-heating in linear or saturated switching modes.
f_T	120 MHz - Gain-bandwidth product indicating usable frequency limit for small-signal amplification or high-speed switching control loops.
t_f	70 ns typ. - Fast fall time enables efficient PWM operation up to ~1–2 MHz in hard-switched topologies with minimal switching loss.
h_FE	200–560 @ V_CE = 5 V, I_C = 100 mA - Wide DC current gain range allows flexible base drive design while maintaining stable saturation across production lots.
P_C (T_c = 25°C)	10 W - Package power dissipation limit at case temperature 25°C; enables direct heatsink mounting without insulator due to plastic-covered heat sink.

Pinout & Package

AML2002 uses the TO-126ML package - a thermally enhanced variant of JEDEC TO-126 with integrated plastic-covered metal heat sink, allowing direct mounting to heatsinks without electrical isolation.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path for majority carriers	Connected to ground or low-side return; must handle full load current and support low-impedance return path for base drive loop.
2 (Collector)	Current entry path for majority carriers	Connected to switched high-voltage rail; electrically isolated from heat sink via plastic coating, enabling direct thermal coupling without insulation.
3 (Base)	Control terminal for minority carrier injection	Receives current-limited drive signal; requires ≥35 mA for guaranteed saturation at I_C = 0.35 A per V_BE(sat) = 0.82–1.2 V specification.

Key Features

Feature	Design Value
Plastic-covered heat sink	Eliminates need for thermal insulator during heatsink mounting - reduces assembly steps, improves thermal resistance, and avoids insulator-related reliability risks.
Low V_CE(sat)	125 mV typical at I_C = 0.35 A - cuts conduction loss by >50% vs. standard NPN transistors, improving efficiency in battery-powered or thermally constrained systems.
High-speed switching	t_f = 70 ns typical - supports clean edge transitions in 500 kHz–1 MHz switching applications such as solid-state relays and motor gate drivers.
Robust voltage rating	V_CEO = 200 V and V_CBO = 220 V - ensures reliable operation in 120/230 VAC line-connected circuits with transient margin.
Wide h_FE range	200–560 at I_C = 100 mA - accommodates production variation while maintaining consistent saturation behavior across batches without recalibrating base drive.

Applications

Industrial Relay Drivers	DC Motor Control Stages
Use Scenario: Driving electromagnetic relays in programmable logic controllers (PLCs) with 24 VDC coils and 100–500 ms switching cycles. IC Role / Device Role / Timing Role: NPN switch providing galvanically isolated coil energization path with fast turn-off to prevent contact arcing. Use Value: Low V_CE(sat) reduces coil power loss and self-heating; plastic-covered heat sink simplifies DIN-rail mount assembly without insulator pads.	Use Scenario: Controlling brushed DC motors in HVAC actuators and valve positioners requiring bidirectional PWM at ≤10 kHz. IC Role / Device Role / Timing Role: Low-side switching element in H-bridge half-bridge stage, handling peak currents up to 0.7 A continuously. Use Value: 70 ns t_f ensures crisp PWM edges; 120 MHz f_T supports stable closed-loop current sensing feedback at 10 kHz sampling rates.
Power Supply OR-ing Circuits	Overvoltage Protection Switches
Use Scenario: Diode-replacement OR-ing in dual-input 24 VDC industrial power supplies where reverse current blocking and low forward drop are critical. IC Role / Device Role / Timing Role: Active NPN switch configured in emitter-follower mode to emulate low-loss diode behavior with controlled turn-on/turn-off. Use Value: V_CE(sat) = 125 mV provides <50% forward voltage of Schottky diodes at same current, reducing heat generation and improving system efficiency.	Use Scenario: Crowbar-style overvoltage protection in 12–48 VDC input rails triggered by comparator output during transient surges. IC Role / Device Role / Timing Role: Fast-acting shunt switch that clamps rail voltage by diverting surge current to ground when threshold exceeded. Use Value: 200 V V_CEO withstands 100 V transients; 2 μs storage time ensures rapid activation before downstream IC damage occurs.

Industrial Relay Drivers

DC Motor Control Stages

Use Scenario: Driving electromagnetic relays in programmable logic controllers (PLCs) with 24 VDC coils and 100–500 ms switching cycles.

IC Role / Device Role / Timing Role: NPN switch providing galvanically isolated coil energization path with fast turn-off to prevent contact arcing.

Use Value: Low V_CE(sat) reduces coil power loss and self-heating; plastic-covered heat sink simplifies DIN-rail mount assembly without insulator pads.

Use Scenario: Controlling brushed DC motors in HVAC actuators and valve positioners requiring bidirectional PWM at ≤10 kHz.

IC Role / Device Role / Timing Role: Low-side switching element in H-bridge half-bridge stage, handling peak currents up to 0.7 A continuously.

Use Value: 70 ns t_f ensures crisp PWM edges; 120 MHz f_T supports stable closed-loop current sensing feedback at 10 kHz sampling rates.

Power Supply OR-ing Circuits

Overvoltage Protection Switches

Use Scenario: Diode-replacement OR-ing in dual-input 24 VDC industrial power supplies where reverse current blocking and low forward drop are critical.

IC Role / Device Role / Timing Role: Active NPN switch configured in emitter-follower mode to emulate low-loss diode behavior with controlled turn-on/turn-off.

Use Value: V_CE(sat) = 125 mV provides <50% forward voltage of Schottky diodes at same current, reducing heat generation and improving system efficiency.

Use Scenario: Crowbar-style overvoltage protection in 12–48 VDC input rails triggered by comparator output during transient surges.

IC Role / Device Role / Timing Role: Fast-acting shunt switch that clamps rail voltage by diverting surge current to ground when threshold exceeded.

Use Value: 200 V V_CEO withstands 100 V transients; 2 μs storage time ensures rapid activation before downstream IC damage occurs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD127G	V_CEO = 100 V, I_C = 2 A, V_CE(sat) = 1.5 V min @ I_C = 1 A - lower voltage rating but higher current capability and no plastic heat sink.	Suitable for lower-voltage, higher-current DC loads (e.g., solenoids), but requires external insulator and heatsink interface.	Select when load voltage ≤ 80 V and peak current > 1 A; avoid for 200 V line-connected designs.
2N6517	V_CEO = 300 V, I_C = 0.5 A, V_CE(sat) = 0.5 V typ. @ I_C = 0.25 A - higher voltage rating but slower switching (t_f = 200 ns) and no integrated heat sink.	Better for high-voltage pulse discharge or snubber circuits, but less efficient in high-duty-cycle switching due to higher V_CE(sat).	Prefer for 250–300 V transient-tolerant applications where speed is secondary to voltage margin.

Compared with MJD127G and 2N6517, the AML2002 uniquely balances 200 V blocking, low 125 mV saturation, and insulator-free thermal mounting - making it optimal for space-constrained industrial controls where both voltage headroom and thermal simplicity matter.

Availability

AML2002 is available at Aetrix Electronics and suitable for industrial relay drivers, DC motor control stages, and overvoltage protection switches requiring stable component supply and long-term manufacturability.

Supply support for AML2002 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The AML2002 belongs to onsemi's general-purpose bipolar transistor product line, engineered for high-reliability industrial switching where low saturation voltage, thermal simplicity, and robust voltage ratings are prioritized over ultra-high speed or RF performance.

FAQ

What is the maximum continuous collector current rating for the AML2002?

The AML2002 has a maximum continuous collector current rating of 0.7 A at case temperature T_c = 25°C. This rating assumes proper heatsinking via its plastic-covered metal tab. At ambient temperature T_a = 25°C, the derated limit is 1.5 W, corresponding to approximately 0.5 A under typical PCB thermal conditions. Always verify junction temperature using the provided thermal resistance curves in the AML2002 datasheet.

Does the AML2002 require an electrical insulator when mounted to a heatsink?

No, the AML2002 does not require an electrical insulator when mounted to a heatsink. Its TO-126ML package integrates a plastic-covered metal heat sink, which electrically isolates the collector (Pin 2) from the mounting surface while maintaining thermal conductivity. This eliminates insulator pads or washers, simplifying mechanical assembly and improving thermal reliability in industrial environments.

What is the typical collector-to-emitter saturation voltage of the AML2002?

The typical collector-to-emitter saturation voltage (V_CE(sat)) of the AML2002 is 125 mV at I_C = 0.35 A and I_B = 35 mA. This low value is confirmed across production lots and contributes directly to reduced conduction losses in switching applications. The maximum specified V_CE(sat) is 220 mV under the same conditions, ensuring predictable worst-case power dissipation in thermal design.

Can the AML2002 be used in high-frequency switching applications above 1 MHz?

The AML2002 is not recommended for sustained operation above 1 MHz. While its f_T is 120 MHz, its switching times (t_f = 70 ns typ., t_stg = 2 μs) and SOA limitations make it best suited for frequencies up to ~500 kHz in hard-switched topologies. For >1 MHz applications, consider RF-optimized transistors with faster storage time and tighter SOA boundaries - the AML2002 excels in medium-frequency industrial switching, not RF or resonant converters.

What is the pin configuration of the AML2002 in TO-126ML package?

The AML2002 in TO-126ML package has a fixed pinout: Pin 1 is Emitter, Pin 2 is Collector, and Pin 3 is Base - verified from the official onsemi outline drawing ENA1837A. The collector (Pin 2) connects directly to the plastic-covered metal tab, enabling heatsink mounting without electrical isolation. This configuration is non-reversible and must be observed during PCB layout to avoid functional failure.

AML2002 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 700 mA

Voltage - Collector Emitter Breakdown (Max):: 200 V

Vce Saturation (Max) @ Ib, Ic:: 220mV @ 35mA, 350mA

Current - Collector Cutoff (Max):: 1µA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 100mA, 5V

Power - Max:: 1.5 W

Frequency - Transition:: 120MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126ML

AML2002 FAQ

1.How can I place an order for AML2002 through Aetrix?

Please submit a Request for Quotation (RFQ) for AML2002 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 AML2002 reliable?

The price and inventory of AML2002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AML2002 is usually 5 days.

3.What payment methods are accepted for AML2002?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AML2002 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AML2002?

AML2002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AML2002 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 AML2002?

For technical support, including AML2002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AML2002 requirements.

6.How does Aetrix verify that AML2002 is sourced from the original manufacturer or authorized distributors?

All AML2002 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 AML2002 meets industry standards.

7.What is the process for return or replacement of AML2002?

All AML2002 units undergo pre-shipment inspection (PSI). If there is an issue with AML2002, 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 AML2002 part is unused and in its original packaging.

Return procedure for AML2002:

1.Submit a request within 90 days.

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

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