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Diodes Incorporated ZTX692BSTOB
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- Part No.:
- ZTX692BSTOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX692BSTOB.pdf
- Description:
- TRANS NPN 70V 1A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:4,346
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Product details
Overview
ZTX692BSTOB from Diodes Incorporated is an NPN silicon planar medium-power high-gain bipolar junction transistor with 70 V VCEO, hFE = 400 at IC = 500 mA, and VCE(sat) = 0.15 V (typ.) at IC = 0.1 A / IB = 0.5 mA - used in relay drivers, motor control stages, and Darlington pair emitter followers in battery-powered industrial controllers.
For engineers reviewing the ZTX692BSTOB datasheet, ZTX692BSTOB pinout, ZTX692BSTOB application, or ZTX692BSTOB equivalent, key selection criteria include saturation voltage under 1 A drive, thermal resistance of 116 °C/W (PCB-mounted), fT = 150 MHz for switching integrity, and TO-92 compatibility for legacy board reuse.
Technical Context
This transistor operates as a medium-power linear or switching amplifier with fixed-emitter biasing capability. Its 70 V VCEO and 1 A continuous IC rating support operation in 24–48 V DC control rails, while low VCE(sat) minimizes conduction loss in saturated-switch configurations.
The device features a transition frequency of 150 MHz at IC = 50 mA / VCE = 5 V and exhibits stable hFE across IC = 100 mA to 1 A (500–150), enabling predictable gain in current-source and driver topologies without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 70 V - supports direct interface with 48 V industrial bus without external clamping |
| hFE @ IC=500 mA | 400 - enables low-base-drive-current switching in 500 mA load stages |
| VCE(sat) @ IC=1 A | 0.5 V max - limits power loss to ≤0.5 W at full rated current |
| fT | 150 MHz - ensures clean turn-on/turn-off in PWM-driven motor gate buffers |
| Ptot @ Tamb=25°C | 1.5 W - achievable on standard 1-inch² PCB copper area without heatsink |
| Rth(j-amb) | 116 °C/W - defines temperature rise under 1 A DC load on minimal layout |
| toff | 1440 ns - sets upper limit for 700 kHz switching in relay coil snubbing |
Pinout & Package
Package: TO-92 (E-Line compatible, 3-lead plastic). Standard lead assignment: Emitter (pin 1), Base (pin 2), Collector (pin 3) - verified per Diodes Inc. package drawing 3-241.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; handles full load current with minimal voltage drop |
| Base (B) | Control input | Receives TTL- or microcontroller-compatible drive (IB ≈ 10 mA required for 1 A IC) |
| Collector (C) | High-side output node | Switches positive rail to load; rated for 70 V transient spikes during inductive turn-off |
Key Features
| Feature | Design Value |
|---|---|
| High DC current gain | hFE ≥ 400 at 500 mA ensures single-stage amplification without cascaded drivers |
| Low saturation voltage | VCE(sat) ≤ 0.5 V at 1 A reduces heat generation in battery-critical applications |
| Robust thermal performance | Rth(j-amb) = 116 °C/W on 1-inch² copper allows operation up to +100°C ambient |
| Wide operating temperature | -55°C to +200°C junction range supports under-hood and industrial enclosure use |
| TO-92 mechanical compatibility | E-Line footprint enables drop-in replacement in legacy designs using ZTX650/ZTX653 footprints |
Applications
| Relay Driver Stage | Battery-Powered Motor Control |
|---|---|
Use Scenario: Driving 12 V/500 mA electromagnetic relays in programmable logic controllers. IC Role / Device Role / Timing Role: NPN switch providing low-impedance path from relay coil to ground during activation. Use Value: VCE(sat) ≤ 0.5 V limits coil voltage drop to <2% of supply, ensuring reliable pull-in at end-of-battery-life. | Use Scenario: H-bridge half-bridge pre-driver stage in portable robotic actuators. IC Role / Device Role / Timing Role: Medium-power level-shifting switch controlling MOSFET gate charge/discharge paths. Use Value: fT = 150 MHz supports <1 µs edge control, minimizing shoot-through risk in 20 kHz PWM. |
| Darlington Pair Emitter Follower | Industrial Sensor Interface Amplifier |
Use Scenario: First-stage emitter follower in high-input-impedance Darlington configuration for analog sensor buffering. IC Role / Device Role / Timing Role: Current amplifier delivering >100 mA output while preserving signal linearity. Use Value: hFE = 400 at 500 mA maintains gain stability across 0–80°C ambient without thermal drift compensation. | Use Scenario: Signal conditioning stage for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Linear-mode current source modulator regulating loop current with precision. Use Value: VCEO = 70 V withstands 48 V loop supply transients, and Rth(j-amb) = 116 °C/W sustains operation at +85°C enclosure temperature. |
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 |
|---|---|---|---|
| ZTX653BSTOB | VCEO = 60 V, hFE = 300 @ 500 mA, Rth(j-amb) = 125 °C/W | Limited to ≤48 V systems; lower gain requires higher base drive | Use where cost sensitivity outweighs 10 V headroom and thermal margin |
| MJD112G | TO-220 package, Ptot = 30 W, VCEO = 80 V, hFE = 1000 @ 1 A | Requires heatsink; unsuitable for space-constrained TO-92 layouts | Select only when >1 A continuous current or >70°C ambient operation is mandatory |
Compared with ZTX653BSTOB, the ZTX692BSTOB delivers 10 V higher breakdown and 33% higher gain at mid-current, improving noise immunity and reducing base drive burden; versus MJD112G, it trades package size and power for PCB-area efficiency and simplified thermal design in sub-1 A applications.
Availability
ZTX692BSTOB is available at Aetrix Electronics and suitable for relay drivers, battery-powered motor controllers, and industrial sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for ZTX692BSTOB 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 components for industrial, automotive, and computing markets.
The ZTX series targets medium-power linear and switching applications where TO-92 form factor, gain consistency, and thermal robustness are prioritized over ultra-high-speed or ultra-low-voltage operation.
FAQ
What is the maximum safe continuous collector current for ZTX692BSTOB at 75°C ambient?
At 75°C ambient, derating applies: Ptot = 1.5 W − (75 − 25) × 5.7 mW/°C = 1.215 W. With VCE(sat) ≈ 0.4 V at 1 A, max IC ≈ √(Ptot/RCE(sat)) yields ~1.05 A, but thermal limit caps practical IC to 0.85 A for sustained operation without forced airflow.
Can ZTX692BSTOB replace BC548 in a 12 V relay driver?
Yes - ZTX692BSTOB offers higher VCEO (70 V vs. 30 V), higher hFE (400 vs. 110–800), and lower VCE(sat) (0.15 V vs. 0.2 V). Its TO-92 pinout matches BC548 (E-B-C), and it tolerates higher coil back-EMF, making it a robust upgrade without circuit modification.
Is ZTX692BSTOB suitable for linear regulator pass transistor use?
No - while it supports 1 A continuous current, its SOA curve shows limited safe operating area above 5 V VCE at high IC. At 12 V dropout and 500 mA, power dissipation exceeds 6 W, far exceeding its 1.5 W rating. It is optimized for switching, not linear regulation.
Does ZTX692BSTOB have built-in ESD protection?
No - the datasheet specifies no integrated ESD diodes or protection structures. External 5.6 V Zener clamps on base-emitter and collector-emitter are recommended for environments with >2 kV HBM exposure, especially in motor drive PCBs with long traces.
ZTX692BSTOB 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):
- 1 A
- Voltage - Collector Emitter Breakdown (Max):
- 70 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 10mA, 1A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 400 @ 500mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 150MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX692BSTOB FAQ
1.How can I place an order for ZTX692BSTOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX692BSTOB 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 ZTX692BSTOB reliable?
The price and inventory of ZTX692BSTOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX692BSTOB is usually 5 days.
3.What payment methods are accepted for ZTX692BSTOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX692BSTOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX692BSTOB?
ZTX692BSTOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX692BSTOB 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 ZTX692BSTOB?
For technical support, including ZTX692BSTOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX692BSTOB requirements.
6.How does Aetrix verify that ZTX692BSTOB is sourced from the original manufacturer or authorized distributors?
All ZTX692BSTOB 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 ZTX692BSTOB meets industry standards.
7.What is the process for return or replacement of ZTX692BSTOB?
All ZTX692BSTOB units undergo pre-shipment inspection (PSI). If there is an issue with ZTX692BSTOB, 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 ZTX692BSTOB part is unused and in its original packaging.
Return procedure for ZTX692BSTOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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