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

onsemi 2SD1827

Name: 2SD1827
Brand: onsemi
SKU: 2SD1827
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SD1827

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3 Full Pack

Datasheet:: 2SD1827.pdf

Description:: TRANS NPN DARL 60V 10A TO-220ML

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Product details

Overview

2SD1827 from SANYO is an NPN epitaxial planar silicon Darlington transistor designed for high-current switching in driver circuits, with V_CEO = −60 V, I_C = −10 A, P_C = 2.0 W (T_c = 25 °C), h_FE ≥ 2000 at I_C = −5 A, and V_CE(sat) = −1.5 V at I_C = −5 A / I_B = −10 mA. It is used in relay drivers, printer hammer drivers, and constant-voltage regulators.

For engineers reviewing the 2SD1827 datasheet, pinout, applications, or equivalent options, key selection considerations include its TO-220ML micaless package, high DC current gain, low saturation voltage, wide safe operating area (SOA), and suitability for industrial motor control and solenoid drive applications requiring robust pulsed-current handling.

Technical Context

The 2SD1827 operates as a two-stage NPN Darlington pair with integrated base-emitter shunt resistors for improved turn-off speed and stability. Its SOA is rated up to I_CP = −15 A for 1–100 ms pulses at T_c = 25 °C, supporting high peak-current loads without secondary breakdown.

Electrical characteristics are specified across −40 °C to +120 °C junction temperature range, with guaranteed h_FE ≥ 500 at I_C = −1 A and ≥ 2000 at I_C = −5 A, enabling precise current amplification in feedback-controlled drivers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−60 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines upper rail limit in high-side switch designs.
I_C (DC)	−10 A - Continuous collector current rating; supports sustained load driving without thermal derating at T_c ≤ 25 °C.
P_C (T_c=25°C)	2.0 W - Collector power dissipation at case temperature 25 °C; requires heatsinking above ambient for full-load operation.
h_FE @ I_C=−5 A	≥2000 - High DC current gain enables microampere-level base drive for ampere-level collector output, reducing driver IC loading.
V_CE(sat)	−1.5 V @ I_C=−5 A / I_B=−10 mA - Low saturation voltage minimizes conduction loss and heat generation in on-state switching applications.
f_T	20 MHz @ V_CE=−5 V, I_C=−5 A - Transition frequency supports moderate-speed switching (e.g., PWM up to ~100 kHz) with controlled rise/fall times.
SOA (10 ms)	−10 A / −100 V boundary - Safe operating area allows short-duration high-voltage, high-current transients typical in inductive load switching.

Pinout & Package

SANYO TO-220ML (micaless) package: insulated metal tab, vertical mounting, no isolation washer required. Pin 1 = Base, Pin 2 = Collector (tab-connected), Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
1 (Base)	Control input terminal	Receives low-current drive signal; internal base-emitter resistor network ensures stable bias and faster turn-off than discrete Darlingtons.
2 (Collector)	High-current output node	Electrically connected to metal tab; must be mounted to heatsink with appropriate insulation if referenced to non-ground potential.
3 (Emitter)	Current return path	Serves as common emitter reference; connects directly to load return or ground in low-side switch configurations.

Key Features

Feature	Design Value
High DC current gain	h_FE ≥ 2000 at I_C = −5 A enables single-stage microcontroller GPIO direct drive without external pre-driver.
Large current capacity	−10 A DC and −15 A pulsed capability supports industrial solenoids, relays, and small motors without parallel devices.
Low saturation voltage	V_CE(sat) = −1.5 V reduces conduction loss to <1.5 W at 5 A, lowering thermal stress and heatsink requirements.
Micaless TO-220ML package	Eliminates need for insulating washers during heatsink mounting, simplifying assembly and improving thermal interface reliability.

Applications

Relay Driver	Printer Hammer Driver
Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules with microcontroller-level base drive. IC Role / Device Role / Timing Role: High-gain NPN Darlington switch providing galvanically isolated load control via optocoupler-coupled base input. Use Value: Eliminates need for discrete BJT stages; V_CE(sat) ≤ −1.5 V ensures relay coil energization margin even at low supply voltages.	Use Scenario: Actuating impact-type print hammers in dot-matrix printers requiring fast, high-current pulses (≤10 ms, −10 A). IC Role / Device Role / Timing Role: High-pulse-current switch triggered by FPGA or ASIC timing controller with precise pulse-width modulation. Use Value: Wide SOA supports repetitive −15 A peaks without secondary breakdown; fast t_f = 1.8 µs limits hammer release delay.
Constant-Voltage Regulator	Motor Driver Stage
Use Scenario: Pass transistor in linear 12 V/3 A regulated power supply for analog instrumentation. IC Role / Device Role / Timing Role: Series pass element controlled by error amplifier feedback loop; dissipates up to 2.0 W continuously. Use Value: High h_FE reduces base drive current burden on op-amp; low V_CE(sat) improves regulation headroom and efficiency.	Use Scenario: Low-side switch for bidirectional DC motor control in battery-powered industrial tools (24 V, 8 A max). IC Role / Device Role / Timing Role: Power stage in H-bridge half-bridge configuration; switched by PWM controller with dead-time management. Use Value: TO-220ML tab conductivity enables direct heatsink attachment; SOA withstands motor back-EMF spikes during commutation.

Relay Driver

Printer Hammer Driver

Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules with microcontroller-level base drive.

IC Role / Device Role / Timing Role: High-gain NPN Darlington switch providing galvanically isolated load control via optocoupler-coupled base input.

Use Value: Eliminates need for discrete BJT stages; V_CE(sat) ≤ −1.5 V ensures relay coil energization margin even at low supply voltages.

Use Scenario: Actuating impact-type print hammers in dot-matrix printers requiring fast, high-current pulses (≤10 ms, −10 A).

IC Role / Device Role / Timing Role: High-pulse-current switch triggered by FPGA or ASIC timing controller with precise pulse-width modulation.

Use Value: Wide SOA supports repetitive −15 A peaks without secondary breakdown; fast t_f = 1.8 µs limits hammer release delay.

Constant-Voltage Regulator

Motor Driver Stage

Use Scenario: Pass transistor in linear 12 V/3 A regulated power supply for analog instrumentation.

IC Role / Device Role / Timing Role: Series pass element controlled by error amplifier feedback loop; dissipates up to 2.0 W continuously.

Use Value: High h_FE reduces base drive current burden on op-amp; low V_CE(sat) improves regulation headroom and efficiency.

Use Scenario: Low-side switch for bidirectional DC motor control in battery-powered industrial tools (24 V, 8 A max).

IC Role / Device Role / Timing Role: Power stage in H-bridge half-bridge configuration; switched by PWM controller with dead-time management.

Use Value: TO-220ML tab conductivity enables direct heatsink attachment; SOA withstands motor back-EMF spikes during commutation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BDW93C	V_CEO = −100 V, I_C = −12 A, P_C = 2.5 W, h_FE ≥ 750 @ I_C = −5 A - higher voltage rating but lower gain.	Preferred where higher breakdown margin is needed (e.g., 48 V systems); less suitable for low-base-drive microcontroller interfaces.	Select BDW93C when V_CEO > −60 V is mandatory; verify h_FE sufficiency for target base current.
MJD127	V_CEO = −100 V, I_C = −8 A, P_C = 1.5 W, h_FE ≥ 1000 @ I_C = −3 A - smaller package (TO-252), lower power, higher gain than BDW93C but lower I_C.	Better suited for space-constrained PCBs; limited to ≤1.5 W dissipation, requiring careful thermal design at full load.	Choose MJD127 for surface-mount layouts or lower-power applications; not drop-in for 2SD1827's TO-220ML mechanical footprint.

Compared with BDW93C and MJD127, the 2SD1827 offers the highest DC current gain among the three while maintaining a balanced V_CEO/I_C rating and TO-220ML thermal interface-making it optimal for microcontroller-driven, medium-voltage, high-gain industrial driver stages where base drive simplicity and SOA robustness are prioritized.

Availability

2SD1827 is available at Aetrix Electronics and suitable for relay drivers, printer hammer drivers, constant-voltage regulators, and motor driver stages requiring stable component supply and long-term industrial availability.

Supply support for 2SD1827 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

SANYO Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in power transistors, analog ICs, and optoelectronics before its acquisition by Panasonic in 2012; its legacy power device portfolio remains widely deployed in industrial systems.

The 2SD1827 belongs to SANYO's high-reliability discrete power transistor family engineered for industrial actuator control, emphasizing high current gain, rugged SOA, and simplified thermal mounting in TO-220ML packaging.

FAQ

What is the maximum continuous collector current rating for the 2SD1827?

The 2SD1827 has a maximum continuous collector current (I_C) rating of −10 A at case temperature T_c = 25 °C. Derating is required above this temperature per the PC–Tc curve in the datasheet; at T_c = 100 °C, the usable I_C drops to approximately −4.5 A. This rating assumes proper heatsinking and adherence to SOA limits during transient conditions.

Is the 2SD1827 pin-compatible with the 2SB1225?

No, the 2SD1827 and 2SB1225 are complementary NPN/PNP Darlington transistors with identical TO-220ML package pinout (Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter), but they are not functionally interchangeable due to opposite polarity. The 2SD1827 is NPN and sinks current, while the 2SB1225 is PNP and sources current; substituting one for the other without circuit redesign will cause functional failure.

What is the typical DC current gain (h_FE) of the 2SD1827 at I_C = −5 A?

The typical DC current gain (h_FE) of the 2SD1827 is ≥2000 at I_C = −5 A, V_CE = −2 V, and T_a = 25 °C. This high gain enables direct drive from microcontroller GPIO pins with base currents as low as −2.5 mA, significantly reducing external driver complexity compared to standard power transistors.

Does the 2SD1827 require a mica insulator when mounted to a heatsink?

No, the 2SD1827 uses SANYO's TO-220ML (micaless) package, where the collector (Pin 2) is internally insulated from the metal tab. This eliminates the need for mica or silicone insulators during heatsink mounting, simplifying assembly and improving thermal contact reliability-provided the tab is electrically referenced to the collector potential in the circuit.

What is the safe operating area (SOA) limit for pulsed operation of the 2SD1827?

The 2SD1827 SOA supports −15 A peak collector current at −100 V for 1–100 ms single pulses at T_c = 25 °C, as shown in the ITR09308/ITR09309 curves. For 10 ms pulses, the device safely handles −10 A at −100 V; exceeding these boundaries risks secondary breakdown. Always verify pulse conditions against the published SOA graph-not just absolute maximum ratings.

2SD1827 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 10 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 10mA, 5A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 2000 @ 5A, 2V

Power - Max:: 2 W

Frequency - Transition:: 20MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220ML

2SD1827 FAQ

1.How can I place an order for 2SD1827 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SD1827 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 2SD1827 reliable?

The price and inventory of 2SD1827 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SD1827 is usually 5 days.

3.What payment methods are accepted for 2SD1827?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SD1827 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SD1827?

2SD1827 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SD1827 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 2SD1827?

For technical support, including 2SD1827 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SD1827 requirements.

6.How does Aetrix verify that 2SD1827 is sourced from the original manufacturer or authorized distributors?

All 2SD1827 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 2SD1827 meets industry standards.

7.What is the process for return or replacement of 2SD1827?

All 2SD1827 units undergo pre-shipment inspection (PSI). If there is an issue with 2SD1827, 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 2SD1827 part is unused and in its original packaging.

Return procedure for 2SD1827:

1.Submit a request within 90 days.

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

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