Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi 2SC5831

Name: 2SC5831
Brand: onsemi
SKU: 2SC5831
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: 2SC5831

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: 2SC5831.pdf

Description:: TRANS NPN DARL 55V 2A TO-126ML

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,432

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

2SC5831 from SANYO is an NPN epitaxial planar silicon transistor designed for high-current switching in inductive load circuits, featuring V_CEO = 55 V, I_C = 2 A continuous, P_C = 1.5 W at T_a = 25°C, and integrated 65±10 V collector-base zener protection-used in motor drivers, relay drivers, and printer hammer drivers.

For engineers reviewing the 2SC5831 datasheet, pinout, applications, or equivalent options, key selection criteria include its wide ASO (25 mJ at L = 100 mH), h_FE = 1000–4000 at I_C = 1 A, f_T = 180 MHz, and TO-126ML package with verified emitter-collector-base terminal assignment.

Technical Context

This device operates as a medium-power NPN bipolar junction transistor optimized for fast-switching inductive loads. Its on-chip 65±10 V zener diode provides intrinsic clamping between collector and base, enabling robust turn-off without external snubbers in relay/motor drive topologies.

It delivers 25 mJ inductive energy handling (E_s/b) with R_BE = 100 Ω, exhibits t_on = 0.2 µs, t_stg = 3.5 µs, and t_f = 0.5 µs under defined test conditions, and maintains h_FE stability across −40°C to +120°C ambient range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	55 V - Maximum safe collector-emitter voltage before breakdown; defines upper rail limit in relay/motor drive stages.
I_C	2 A - Continuous DC collector current rating; supports sustained 24 V/12 V solenoid and small DC motor loads.
P_C	1.5 W @ T_a = 25°C - Thermal dissipation limit without heatsink; requires thermal derating above 25°C ambient.
h_FE	1000–4000 @ V_CE = 5 V, I_C = 1 A - High DC gain enables low-base-drive current designs (e.g., 4 mA drives 1 A load).
f_T	180 MHz - Transition frequency confirms suitability for high-speed switching up to ~10–20 kHz PWM operation.
E_s/b	25 mJ @ L = 100 mH, R_BE = 100 Ω - Verified inductive energy absorption capability without secondary breakdown.
V_(BR)CBO	55–75 V - Confirmed collector-base breakdown range; supports zener-clamped inductive flyback management.

Pinout & Package

SANYO TO-126ML plastic power package: 3-pin through-hole, vertical mounting, tab-connected to collector, JEDEC-compliant footprint with 15.5 mm height and 3.3 mm width.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path from transistor	Connected to ground or low-side return; forms common reference for base drive and load current return.
2 (Collector)	Current entry path into transistor	Tab-connected; electrically tied to heatsink or PCB copper pour for thermal conduction and EMI control.
3 (Base)	Control electrode for carrier injection	Receives low-current drive signal (e.g., microcontroller GPIO via current-limiting resistor); controls saturation state.

Key Features

Feature	Design Value
On-chip zener diode	65±10 V between collector and base - eliminates need for external clamp diode in inductive switching circuits.
Wide SOA (Safe Operating Area)	25 mJ rated inductive energy handling - enables reliable operation under repetitive inductive transients without second breakdown.
High DC current gain	h_FE ≥ 1000 at I_C = 1 A - reduces required base drive current and simplifies driver stage design.
Uniform V_CBO distribution	Specified min/typ/max spread (55/65/75 V) - ensures consistent clamping behavior across production lots.

Applications

Motor Driver Stage	Relay Driver Circuit
Use Scenario: Driving 12–24 V brushed DC motors in office automation equipment (e.g., paper feed mechanisms). IC Role / Device Role / Timing Role: Main switching element in low-side configuration; handles bidirectional current during commutation and flyback. Use Value: Integrated 65±10 V zener prevents voltage overshoot beyond 75 V during inductive turn-off, eliminating external TVS or diode.	Use Scenario: Controlling 12–48 V electromagnetic relays in industrial PLC I/O modules. IC Role / Device Role / Timing Role: High-gain saturated switch delivering >1 A coil current with <4 mA base drive. Use Value: h_FE ≥ 1000 ensures full saturation even at elevated temperatures (120°C), minimizing contact chatter risk.
Printer Hammer Driver	Inductive Load Snubberless Switch
Use Scenario: Actuating solenoid-based print hammers in dot-matrix printers requiring rapid on/off cycling. IC Role / Device Role / Timing Role: Fast-switching power stage with t_on = 0.2 µs and t_f = 0.5 µs to support >5 kHz pulse rates. Use Value: 180 MHz f_T supports clean square-wave drive with minimal rise/fall distortion at target frequencies.	Use Scenario: Replacing discrete BJT + external zener in space-constrained board layouts for HVAC valve actuators. IC Role / Device Role / Timing Role: Single-device solution combining switching and clamping functions in TO-126ML outline. Use Value: Eliminates two components (BJT + zener), reduces BOM count, and improves reliability by removing solder joint failure points.

Motor Driver Stage

Relay Driver Circuit

Use Scenario: Driving 12–24 V brushed DC motors in office automation equipment (e.g., paper feed mechanisms).

IC Role / Device Role / Timing Role: Main switching element in low-side configuration; handles bidirectional current during commutation and flyback.

Use Value: Integrated 65±10 V zener prevents voltage overshoot beyond 75 V during inductive turn-off, eliminating external TVS or diode.

Use Scenario: Controlling 12–48 V electromagnetic relays in industrial PLC I/O modules.

IC Role / Device Role / Timing Role: High-gain saturated switch delivering >1 A coil current with <4 mA base drive.

Use Value: h_FE ≥ 1000 ensures full saturation even at elevated temperatures (120°C), minimizing contact chatter risk.

Printer Hammer Driver

Inductive Load Snubberless Switch

Use Scenario: Actuating solenoid-based print hammers in dot-matrix printers requiring rapid on/off cycling.

IC Role / Device Role / Timing Role: Fast-switching power stage with t_on = 0.2 µs and t_f = 0.5 µs to support >5 kHz pulse rates.

Use Value: 180 MHz f_T supports clean square-wave drive with minimal rise/fall distortion at target frequencies.

Use Scenario: Replacing discrete BJT + external zener in space-constrained board layouts for HVAC valve actuators.

IC Role / Device Role / Timing Role: Single-device solution combining switching and clamping functions in TO-126ML outline.

Use Value: Eliminates two components (BJT + zener), reduces BOM count, and improves reliability by removing solder joint failure points.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
2SC4110	V_CEO = 60 V, I_C = 2 A, h_FE = 100–400 - lower gain, no integrated zener	Requires external 65 V zener for inductive clamping; suitable where gain margin is less critical	Select when cost sensitivity outweighs need for integrated protection and higher drive efficiency
MJD127	V_CEO = 100 V, I_C = 2 A, P_C = 20 W @ T_c = 25°C - higher power, TO-220 package	Better thermal performance but larger footprint; no on-chip zener	Choose for higher ambient temperature or longer duty-cycle operation where TO-126ML thermal limits are exceeded

Compared with 2SC5831, 2SC4110 offers lower cost but demands external clamping and delivers reduced drive efficiency due to lower h_FE, while MJD127 provides superior thermal headroom in TO-220 but increases board area and lacks integrated zener protection.

Availability

2SC5831 is available at Aetrix Electronics and suitable for motor drivers, relay drivers, and printer hammer drivers requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial control and office equipment manufacturing.

Supply support for 2SC5831 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 analog and power devices before its acquisition by Panasonic; known for high-reliability discrete transistors and optoelectronics.

The 2SC5831 belongs to SANYO's general-purpose power transistor product line, engineered specifically for robust inductive load switching in cost-sensitive industrial and office automation systems.

FAQ

What is the maximum continuous collector current rating for the 2SC5831?

The 2SC5831 has a maximum continuous collector current (I_C) of 2 A at T_a = 25°C. This rating decreases with rising ambient temperature per the PC–Ta derating curve. At T_a = 70°C, usable I_C drops to approximately 1.2 A. Always verify thermal design margins using the published PC–Ta and PC–Tc curves in the 2SC5831 datasheet.

Does the 2SC5831 include built-in overvoltage protection?

Yes, the 2SC5831 integrates an on-chip zener diode rated at 65±10 V between collector and base. This feature provides inherent clamping during inductive turn-off events, eliminating the need for an external zener or TVS diode in many relay and motor driver applications. The 2SC5831's V_(BR)CBO min/max range (55–75 V) confirms this functionality.

What is the Safe Operating Area (SOA) performance of the 2SC5831?

The 2SC5831 is rated for 25 mJ of inductive energy absorption (E_s/b) with L = 100 mH and R_BE = 100 Ω. This SOA value reflects tested second-breakdown immunity under pulsed inductive conditions. It is validated per the specified Es/b test circuit and supports reliable operation in printer hammer and solenoid drivers without external snubbers.

What package type does the 2SC5831 use, and how is the collector connected?

The 2SC5831 uses the SANYO TO-126ML plastic power package. Pin 2 is the collector and is internally connected to the metal tab, which must be electrically and thermally coupled to the PCB ground plane or heatsink. This tab connection enables efficient heat dissipation and provides a low-inductance path for collector current return.

Can the 2SC5831 replace a standard 2N2222 in high-current switching applications?

No - the 2SC5831 is not a drop-in replacement for the 2N2222. While both are NPN transistors, the 2SC5831 is rated for 2 A continuous current and 1.5 W dissipation, versus 2N2222's 0.8 A and 0.5 W. Additionally, the 2SC5831 uses TO-126ML packaging and features integrated zener clamping, unlike the TO-92 2N2222. Direct substitution would require layout, drive, and thermal redesign.

2SC5831 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Active

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 2 A

Voltage - Collector Emitter Breakdown (Max):: 55 V

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 4mA, 1A

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1000 @ 1A, 5V

Power - Max:: 1.5 W

Frequency - Transition:: 180MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-126ML

2SC5831 FAQ

1.How can I place an order for 2SC5831 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SC5831 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 2SC5831 reliable?

The price and inventory of 2SC5831 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SC5831 is usually 5 days.

3.What payment methods are accepted for 2SC5831?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SC5831 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SC5831?

2SC5831 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SC5831 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 2SC5831?

For technical support, including 2SC5831 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SC5831 requirements.

6.How does Aetrix verify that 2SC5831 is sourced from the original manufacturer or authorized distributors?

All 2SC5831 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 2SC5831 meets industry standards.

7.What is the process for return or replacement of 2SC5831?

All 2SC5831 units undergo pre-shipment inspection (PSI). If there is an issue with 2SC5831, 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 2SC5831 part is unused and in its original packaging.

Return procedure for 2SC5831:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…