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Diodes Incorporated ZTX869STOA
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- Part No.:
- ZTX869STOA
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3
- Datasheet:
-
ZTX869STOA.pdf
- Description:
- TRANS NPN 25V 5A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:9,295
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Product details
Overview
ZTX869STOA from Diodes Incorporated is an NPN silicon planar medium-power high-current transistor with VCEO = 25 V, IC = 5 A continuous, Ptot = 1.2 W at Tamb = 25°C, VCE(sat) ≤ 200 mV at IC = 5 A / IB = 100 mA, and hFE ≥ 250 at IC = 5 A - used in industrial DC-DC converter switching stages and motor drive half-bridge emitter followers.
For engineers reviewing the ZTX869STOA datasheet, ZTX869STOA pinout, ZTX869STOA application, or ZTX869STOA equivalent, key selection criteria include verified saturation voltage under 5 A load, thermal resistance Rth(j-amb) = 150 °C/W on standard PCB mounting, and safe operating area compliance up to 20 A peak pulse current.
Technical Context
This NPN bipolar junction transistor operates in linear and switching modes with a maximum collector-emitter breakdown voltage of 25 V and guaranteed gain (hFE) ≥ 250 at 5 A collector current. Its low VCE(sat) (≤200 mV) and high fT (100 MHz) support efficient medium-speed switching in power control circuits.
The device uses a TO-92 compatible E-Line package with emitter-base breakdown voltage ≥6 V and thermal resistance from junction to ambient rated at 150 °C/W under standard 1-inch² copper PCB mounting - enabling reliable operation up to +200°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 25 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration. |
| IC (continuous) | 5 A - Continuous collector current rating defining steady-state power stage capacity. |
| Ptot | 1.2 W - Total power dissipation limit at 25°C ambient on standard PCB layout. |
| VCE(sat) | 200 mV max at IC = 5 A / IB = 100 mA - Low conduction loss critical for efficiency in saturated-switch applications. |
| hFE | 250 min at IC = 5 A - Sufficient DC current gain to drive with modest base current in high-current switching. |
| fT | 100 MHz - Transition frequency confirming usable bandwidth for sub-100 ns switching transitions. |
| Rth(j-amb) | 150 °C/W - Thermal resistance defining junction-to-ambient temperature rise per watt dissipated on standard PCB. |
Pinout & Package
Package: TO-92 compatible E-Line (3-306 outline), through-hole mounting, epoxy molded, lead-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance return path for collector current; connected to ground or low-side reference in switch configurations. |
| Base (B) | Control input | Receives forward bias current to saturate or cut off the transistor; requires current-limiting resistor in series. |
| Collector (C) | Current source terminal | High-side connection point for load; carries full switched current and must be routed with adequate copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Low saturation voltage | VCE(sat) ≤ 200 mV at 5 A enables <1 W conduction loss in high-current switching nodes. |
| High current capability | 20 A peak pulse rating supports surge-tolerant motor start-up and inductive load commutation. |
| Wide temperature range | –55°C to +200°C operating range allows deployment in under-hood automotive and industrial environments. |
| Stable gain at high current | hFE ≥ 250 maintained at IC = 5 A ensures predictable base drive requirements without gain collapse. |
Applications
| DC-DC Converter Switch | Motor Drive Half-Bridge |
|---|---|
Use Scenario: High-efficiency 12 V to 5 V buck converter in industrial PLC power supply. IC Role / Device Role / Timing Role: NPN switch controlling energy transfer through main inductor during ON phase. Use Value: 200 mV VCE(sat) limits conduction loss to <1 W at 5 A, improving thermal margin and efficiency over alternatives. | Use Scenario: Low-side driver in brushed DC motor H-bridge for HVAC actuator. IC Role / Device Role / Timing Role: Saturated switch sinking motor current during PWM-controlled direction phases. Use Value: 20 A peak rating accommodates motor stall currents without secondary breakdown, enhancing system reliability. |
| Linear Regulator Pass Element | Overcurrent Protection Circuit |
Use Scenario: Adjustable 3 A linear regulator for analog sensor bias supply in test equipment. IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage via base voltage control. Use Value: Stable hFE ≥ 250 at 5 A ensures precise current mirror-based feedback loop performance. | Use Scenario: Current-sense amplifier front-end in battery protection IC for 12 V LiFePO4 packs. IC Role / Device Role / Timing Role: Fast-switching shunt element activated by comparator output during overcurrent events. Use Value: 100 MHz fT and 60 ns turn-on time enable sub-microsecond fault response, preventing cell damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN high-current switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX851 | VCEO = 60 V, IC = 2 A, Ptot = 1 W - higher voltage rating but lower current and power handling. | Suitable for 48 V systems where 25 V headroom is insufficient, but not for 5 A continuous loads. | Select ZTX851 only when VCEO > 40 V is required and peak current remains below 2 A. |
| BCX56-16 | VCEO = 80 V, IC = 1 A, hFE = 100–250 - higher voltage, lower current, narrower gain spread. | Used in low-power interface logic level shifting; lacks thermal robustness for sustained 5 A operation. | Choose BCX56-16 for signal-level amplification or low-current switching where voltage margin outweighs current needs. |
Compared with ZTX869STOA, ZTX851 trades current capacity for voltage headroom while BCX56-16 sacrifices both current and thermal capability for broader voltage tolerance - making ZTX869STOA uniquely suited for 25 V, 5 A saturated-switch roles requiring low VCE(sat) and high junction temperature resilience.
Availability
ZTX869STOA is available at Aetrix Electronics and suitable for industrial motor drives, DC-DC converters, and overcurrent protection circuits requiring stable component supply across multi-year production cycles.
Supply support for ZTX869STOA 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, specializing in high-reliability power management and signal integrity solutions for industrial and automotive markets.
ZTX869STOA belongs to Diodes' legacy high-current bipolar transistor product line, designed specifically for cost-sensitive, thermally constrained medium-power switching applications where TO-92 compatibility and proven ruggedness are essential.
FAQ
What is the maximum safe operating temperature for ZTX869STOA?
The ZTX869STOA has a specified junction temperature range of –55°C to +200°C. Its maximum safe operating temperature is therefore +200°C, provided that power dissipation remains within derated limits defined by the thermal resistance curve - e.g., at 100°C ambient, maximum dissipation drops to ~0.67 W based on Rth(j-amb) = 150 °C/W.
Can ZTX869STOA replace a MOSFET in low-voltage switching applications?
ZTX869STOA can replace low-voltage N-channel MOSFETs only in saturated-switch roles where gate drive simplicity and cost outweigh efficiency needs. Unlike MOSFETs, it requires continuous base current and exhibits higher conduction loss than modern logic-level MOSFETs - but offers superior ruggedness against voltage transients and no gate oxide vulnerability.
Is ZTX869STOA RoHS compliant and lead-free?
Yes, ZTX869STOA is RoHS compliant and manufactured with lead-free terminations per Diodes Incorporated's standard qualification. The TO-92 package meets J-STD-020 moisture sensitivity level (MSL) 1 and is compatible with standard reflow and wave soldering processes when mounted per recommended footprint guidelines.
How does ZTX869STOA's Safe Operating Area (SOA) compare to ZTX851?
ZTX869STOA's SOA extends to 5 A DC and 20 A pulsed at 25 V, significantly exceeding ZTX851's 2 A DC/10 A pulsed rating. At 10 V VCE, ZTX869STOA sustains 5 A continuously, whereas ZTX851 is limited to ~1.5 A - reflecting its optimized thermal design and higher Ptot rating for sustained high-current operation.
ZTX869STOA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 25 V
- Vce Saturation (Max) @ Ib, Ic:
- 220mV @ 100mA, 5A
- Current - Collector Cutoff (Max):
- 50nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 300 @ 1A, 1V
- Power - Max:
- 1.2 W
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX869STOA FAQ
1.How can I place an order for ZTX869STOA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX869STOA 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 ZTX869STOA reliable?
The price and inventory of ZTX869STOA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX869STOA is usually 5 days.
3.What payment methods are accepted for ZTX869STOA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX869STOA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX869STOA?
ZTX869STOA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX869STOA 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 ZTX869STOA?
For technical support, including ZTX869STOA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX869STOA requirements.
6.How does Aetrix verify that ZTX869STOA is sourced from the original manufacturer or authorized distributors?
All ZTX869STOA 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 ZTX869STOA meets industry standards.
7.What is the process for return or replacement of ZTX869STOA?
All ZTX869STOA units undergo pre-shipment inspection (PSI). If there is an issue with ZTX869STOA, 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 ZTX869STOA part is unused and in its original packaging.
Return procedure for ZTX869STOA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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