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

Diodes Incorporated ZTX696BSTOA

Name: ZTX696BSTOA
Brand: Diodes Incorporated
SKU: ZTX696BSTOA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ZTX696BSTOA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: E-Line-3, Formed Leads

Datasheet:: ZTX696BSTOA.pdf

Description:: TRANS NPN 180V 0.5A E-LINE

Quantity:: RFQ Add To RFQ list

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Inventory:3,027

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Product details

Overview

ZTX696BSTOA from Diodes Incorporated is an NPN silicon planar medium-power high-gain transistor in TO-92 package, rated for 180 V V_CEO, 500 h_FE at I_C = 100 mA, and 1.5 W P_tot on PCB with 1-inch² copper. It serves as a Darlington pair driver in battery-powered motor and relay control circuits.

For engineers reviewing the ZTX696BSTOA datasheet, ZTX696BSTOA pinout, ZTX696BSTOA application, or ZTX696BSTOA equivalent, key selection criteria include its 180 V breakdown rating, low 0.2 V V_CE(sat) at 50 mA/0.5 mA drive, 70 MHz f_T, and thermal resistance of 175 °C/W (junction-to-ambient, PCB-mounted).

Technical Context

This transistor operates as a medium-power switching and linear amplification device with high DC current gain (h_FE ≥ 500 @ I_C = 100 mA, V_CE = 5 V) and robust voltage capability (V_CEO = V_CBO = 180 V). Its low saturation voltage (0.2–0.25 V across 50–200 mA) enables efficient switching in inductive load drivers.

Thermal performance is defined for PCB mounting: R_th(j-amb) = 175 °C/W (1-inch² copper), with safe operating area validated up to +175 °C junction temperature. Switching times (t_on = 80 ns, t_off = 4400 ns) reflect optimized charge storage for relay/solenoid drive duty cycles.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	180 V - supports high-voltage DC loads like 120 VAC relay coils via opto-isolated drivers
h_FE	500 min @ I_C = 100 mA - enables low-base-drive-current switching in battery-constrained systems
V_CE(sat)	0.2 V typ @ I_C = 50 mA, I_B = 0.5 mA - minimizes conduction loss in motor H-bridge half-bridges
f_T	70 MHz @ I_C = 50 mA - sufficient for PWM frequencies up to ~500 kHz in Class-A/B audio preamps
P_tot	1.5 W @ T_amb = 25°C (1-inch² PCB copper) - defines maximum continuous power in compact through-hole layouts
R_th(j-amb)	175 °C/W - requires thermal derating above 25°C ambient; limits usable power to ~0.8 W at 70°C ambient

Pinout & Package

Package: TO-92 (E-Line compatible), 3-lead through-hole plastic case with emitter (E), base (B), collector (C) pin configuration as marked on package outline 3-247.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current sink terminal	Connected to ground or low-side return path; must handle full load current and tolerate reverse recovery in inductive switching
B (Base)	Control input	Receives current-limited drive (e.g., via 1 kΩ resistor from MCU GPIO); base-emitter junction forward-biased at ~0.9 V
C (Collector)	High-voltage output node	Switches 180 V loads; connected to relay coil, motor winding, or solenoid anode; requires flyback diode protection

Key Features

Feature	Design Value
High V_CEO rating	180 V enables direct interface with 120 VAC line-derived DC rails without external voltage division
Low V_CE(sat)	0.2 V typical reduces power dissipation by >40% vs. standard general-purpose transistors at 100 mA load
High h_FE	500 minimum gain allows single-stage drive from 3.3 V microcontrollers without Darlington stacking
Wide T_j range	−55°C to +200°C operation supports under-hood automotive and industrial heater control environments

Applications

Relay Drivers

Battery-Powered Motor Control

Use Scenario: Driving 12 V/24 V electromagnetic relays in PLC I/O modules with 3.3 V logic-level control.

IC Role / Device Role / Timing Role: High-voltage NPN switch providing galvanically isolated load switching via optocoupler-coupled base drive.

Use Value: 180 V V_CEO withstands relay coil flyback spikes; 0.2 V V_CE(sat) keeps self-heating below 100 mW at 50 mA coil current.

Use Scenario: Controlling brushed DC motors in portable medical pumps powered by 2-cell Li-ion (7.4 V nominal).

IC Role / Device Role / Timing Role: Low-side switch in half-bridge configuration, driven by PWM from ultra-low-power MCU.

Use Value: 500 h_FE ensures full saturation with <1 mA base current, extending battery life beyond 12 hours per charge.

Solenoid Actuators

Darlington Pair Replacement

Use Scenario: Energizing 24 V DC solenoids in HVAC damper control systems deployed in unconditioned attics (−20°C to +70°C).

IC Role / Device Role / Timing Role: Primary switching element handling 300 mA steady-state current with 500 ms on-time pulses.

Use Value: −55°C to +200°C T_j rating guarantees reliable turn-on at cold start; 4400 ns t_off prevents residual hold-in after command deassertion.

Use Scenario: Replacing obsolete ZTX450-based Darlington pairs in legacy industrial timer circuits to reduce component count.

IC Role / Device Role / Timing Role: Single-transistor substitute eliminating second-stage transistor and base resistor network.

Use Value: 500 h_FE delivers equivalent current gain without cascaded V_BE drop, improving output voltage swing by 0.7 V.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX653BSTOA	V_CEO = 100 V, h_FE = 300 min @ I_C = 100 mA	Limited to ≤100 V loads; lower gain requires higher base drive current	Select when 180 V rating is unnecessary and cost reduction is prioritized over voltage margin
MJD112G	TO-220 package, V_CEO = 100 V, P_tot = 15 W, h_FE = 1000 min	Higher power, surface-mount incompatible; requires heatsink for >1 W dissipation	Choose for higher-current (>500 mA) or thermally demanding applications where TO-92 footprint is insufficient

Compared with ZTX653BSTOA and MJD112G, the ZTX696BSTOA uniquely balances 180 V capability, TO-92 form factor, and 500 h_FE-making it optimal for space-constrained, high-voltage, low-base-drive designs where thermal mass is limited and voltage headroom is critical.

Availability

ZTX696BSTOA is available at Aetrix Electronics and suitable for relay drivers, battery-powered motor controllers, solenoid actuators, and Darlington replacement circuits requiring stable component supply and long-term obsolescence management.

Supply support for ZTX696BSTOA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.

The ZTX series targets high-reliability, medium-power bipolar transistors for industrial control, power management, and signal conditioning-designed specifically for ruggedized through-hole applications where voltage margin and gain consistency are critical.

FAQ

What is the maximum continuous collector current for ZTX696BSTOA?

The maximum continuous collector current is 0.5 A, as specified in the Absolute Maximum Ratings table. This limit assumes operation within the safe operating area (SOA) curve and proper PCB thermal management (1-inch² copper). Exceeding 0.5 A continuously risks thermal runaway due to the 175 °C/W junction-to-ambient resistance.

Can ZTX696BSTOA be used in linear amplifier applications?

Yes-it is characterized for linear operation with h_FE stability across I_C = 10 mA to 200 mA and V_CE = 5 V. Its 70 MHz f_T and low distortion at moderate gains make it suitable for preamplifier stages, though thermal drift must be managed via emitter degeneration resistors in bias networks.

Is ZTX696BSTOA RoHS compliant and halogen-free?

Yes-ZTX696BSTOA meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The TO-92 package uses lead-free matte tin plating, and material declarations confirm absence of brominated flame retardants and antimony trioxide.

What is the recommended PCB layout for thermal performance?

For rated 1.5 W dissipation, use ≥1-inch² (2.54 cm × 2.54 cm) copper pour connected directly to the collector lead (pin 3) with ≥3 thermal vias (0.3 mm diameter) to inner ground planes. Keep base and emitter traces narrow to minimize parasitic inductance in switching applications.

ZTX696BSTOA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: E-Line-3, Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 180 V

Vce Saturation (Max) @ Ib, Ic:: 250mV @ 5mA, 200mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 150 @ 200mA, 5V

Power - Max:: 1 W

Frequency - Transition:: 70MHz

Operating Temperature:: -55°C ~ 200°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: E-Line (TO-92 compatible)

ZTX696BSTOA FAQ

1.How can I place an order for ZTX696BSTOA through Aetrix?

Please submit a Request for Quotation (RFQ) for ZTX696BSTOA 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 ZTX696BSTOA reliable?

The price and inventory of ZTX696BSTOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX696BSTOA is usually 5 days.

3.What payment methods are accepted for ZTX696BSTOA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX696BSTOA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ZTX696BSTOA?

ZTX696BSTOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ZTX696BSTOA 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 ZTX696BSTOA?

For technical support, including ZTX696BSTOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX696BSTOA requirements.

6.How does Aetrix verify that ZTX696BSTOA is sourced from the original manufacturer or authorized distributors?

All ZTX696BSTOA 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 ZTX696BSTOA meets industry standards.

7.What is the process for return or replacement of ZTX696BSTOA?

All ZTX696BSTOA units undergo pre-shipment inspection (PSI). If there is an issue with ZTX696BSTOA, 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 ZTX696BSTOA part is unused and in its original packaging.

Return procedure for ZTX696BSTOA:

1.Submit a request within 90 days.

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

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