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Diodes Incorporated ZTX653QSTZ
- Part No.:
- ZTX653QSTZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX653QSTZ.pdf
- Description:
- TRANS NPN 100V 2A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:2,295
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Product details
Overview
ZTX653QSTZ from Diodes Incorporated is an NPN silicon planar medium-power transistor designed for switching and linear amplification in industrial control, power supply regulation, and motor drive stages. It delivers 100 V VCEO, 2 A continuous collector current, 0.13 V typical VCE(sat) at IC=1 A/IB=100 mA, 175 MHz fT, and operates up to +200°C junction temperature.
For engineers reviewing the ZTX653QSTZ datasheet, ZTX653QSTZ pinout, ZTX653QSTZ application, or ZTX653QSTZ equivalent, key selection criteria include its 100 V breakdown rating, low saturation voltage under high-current switching, TO-92-compatible 3-223 package thermal performance, and validated safe operating area for pulsed loads up to 2 A.
Technical Context
The ZTX653QSTZ is a discrete NPN bipolar junction transistor optimized for medium-power switching with fast turn-on (80 ns) and controlled turn-off (1200 ns) characteristics. Its 175 MHz transition frequency supports audio-frequency amplification and PWM-driven load control, while the 0.13–0.5 V VCE(sat) range ensures minimal conduction loss across 1–2 A loads.
Thermal design is enabled by Rth(j-amb) = 116 °C/W on 1 in² PCB copper and Rth(j-case) = 70 °C/W, supporting stable operation at Tj up to +200°C. The device meets JEDEC TO-92 mechanical compatibility standards (3-223 outline) and is rated for continuous 1 W dissipation at 25°C ambient, derating linearly above that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - Maximum sustainable collector-emitter voltage before avalanche breakdown under open-base conditions. |
| IC (continuous) | 2 A - Continuous DC collector current capability without exceeding thermal limits on standard PCB mounting. |
| VCE(sat) | 0.13 V (typ.) at IC=1 A, IB=100 mA - Low saturation voltage minimizes power loss in saturated-switch applications. |
| fT | 175 MHz - Transition frequency confirms usable gain-bandwidth for audio amplification and high-speed switching control loops. |
| Rth(j-amb) | 116 °C/W - Thermal resistance from junction to ambient on 1 in² copper PCB, defining maximum power vs. ambient temperature rise. |
| Tj(max) | +200°C - Maximum allowable junction temperature enables operation in harsh environments like motor controllers and industrial power supplies. |
Pinout & Package
Package: TO-92-compatible 3-223 outline (E-Line), epoxy-molded, through-hole mountable, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Low-impedance output path; connected to ground or low-side return in common-emitter configurations. |
| Base (B) | Control input | Receives drive current to bias transistor into active/saturation; requires ~100–200 mA for full 2 A switching. |
| Collector (C) | Current source terminal | High-side connection to load or supply rail; handles full switched current and must be routed with adequate trace width. |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | 0.13 V typ. at 1 A - Reduces conduction losses by >40% vs. legacy 0.22 V devices in 12 V relay drivers. |
| High VCEO | 100 V - Enables direct interface with 24–48 V industrial bus systems without external clamping. |
| Fast switching | 80 ns ton, 1200 ns toff - Supports PWM frequencies up to 10 kHz in motor gate drivers with predictable timing margins. |
| Robust thermal rating | +200°C Tj(max) - Allows deployment in engine bay electronics and sealed power modules without forced cooling. |
Applications
| Industrial Relay Drivers | DC-DC Converter Switches |
|---|---|
Use Scenario: Driving 24 V/500 mA electromagnetic relays in PLC I/O modules with microcontroller GPIO-level base drive. IC Role / Device Role / Timing Role: NPN switch operating in saturation to close relay coil circuit with minimal voltage drop and heat generation. Use Value: 0.13 V VCE(sat) ensures >95% coil voltage delivery and eliminates need for heatsinking at 1 Hz switching. | Use Scenario: High-side switch in non-isolated buck converter feedback loop controlling 12 V → 5 V conversion at 500 kHz. IC Role / Device Role / Timing Role: Medium-speed switching element handling peak currents up to 2 A during duty-cycle transitions. Use Value: 175 MHz fT and 80 ns ton support stable closed-loop regulation without phase lag-induced instability. |
| Motor Control H-Bridge Legs | Overvoltage Protection Circuits |
Use Scenario: Low-side switch in brushed DC motor driver stage delivering 1.5 A continuous current with PWM dimming at 20 kHz. IC Role / Device Role / Timing Role: Current-handling transistor biased via gate driver IC, switching between cutoff and saturation states. Use Value: 100 V VCEO withstands inductive kickback spikes up to 85 V, eliminating need for external TVS diodes. | Use Scenario: Crowbar element in lab power supply overvoltage shutdown circuit triggered at 36 V threshold. IC Role / Device Role / Timing Role: Fast-acting shunt switch activated by comparator output to short output to ground upon fault detection. Use Value: 1200 ns toff ensures reliable latch-and-hold behavior while 2 A IC rating sustains fault current until upstream fuse blows. |
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 |
|---|---|---|---|
| ZTX653 (standard suffix) | Same die, identical electrical specs; QSTZ denotes tape-and-reel packaging per EIA-481-D standard. | No functional difference - QSTZ is preferred for automated SMT placement; standard ZTX653 used for manual prototyping. | Select QSTZ for volume production with pick-and-place; use ZTX653 for breadboard evaluation. |
| MJD127G | Higher VCEO (100 V same), but lower fT (100 MHz), higher VCE(sat) (0.5 V min), TO-220 package. | Requires heatsink above 0.5 A; unsuitable for space-constrained TO-92 layouts. | Choose only when >2 A peak current or >1.5 W dissipation is required and board space allows TO-220 footprint. |
Compared with ZTX653QSTZ, the standard ZTX653 offers identical performance in manual assembly, while MJD127G trades speed and package size for higher thermal mass - making QSTZ optimal for compact, high-efficiency 1–2 A switching where PCB real estate and thermal management are constrained.
Availability
ZTX653QSTZ is available at Aetrix Electronics and suitable for industrial relay drivers, DC-DC converter switches, motor control H-bridge legs, and overvoltage protection circuits requiring stable component supply and long-term manufacturability.
Supply support for ZTX653QSTZ 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 leader in discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and computing applications.
The ZTX series targets medium-power discrete switching and amplification, with ZTX653QSTZ engineered specifically for robust, thermally efficient operation in space-constrained industrial control and power conversion designs.
FAQ
Is ZTX653QSTZ pin-compatible with ZTX652?
No. Although both share the TO-92-compatible 3-223 outline, ZTX652 is obsolete and not recommended for new designs. ZTX653QSTZ has higher VCEO (100 V vs. 80 V) and improved fT (175 MHz vs. 140 MHz), requiring verification of safe operating area margins in legacy ZTX652 layouts before substitution.
What is the maximum allowable base current for continuous operation?
The datasheet specifies IB = 200 mA for IC = 2 A saturation. Continuous base current must remain ≤200 mA with adequate PCB copper to limit junction temperature rise. Exceeding this risks thermal runaway due to β degradation above 150°C junction temperature.
Can ZTX653QSTZ be used in linear amplifier configurations?
Yes - its hFE of 100–300 at IC = 100 mA and fT of 175 MHz support Class-A audio preamplifier and sensor signal conditioning stages. However, power dissipation must be limited to ≤0.5 W at 25°C ambient to maintain linearity and avoid thermal drift in gain.
Does ZTX653QSTZ require a base resistor in switching applications?
Yes - a series base resistor is mandatory to limit IB and prevent damage. For 2 A switching with hFE ≥10, a 100 Ω resistor is typical with 3.3 V MCU drive; exact value depends on drive voltage, desired saturation margin, and thermal budget per application layout.
ZTX653QSTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- 1 W
- Frequency - Transition:
- 175MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX653QSTZ FAQ
1.How can I place an order for ZTX653QSTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX653QSTZ 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 ZTX653QSTZ reliable?
The price and inventory of ZTX653QSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX653QSTZ is usually 5 days.
3.What payment methods are accepted for ZTX653QSTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX653QSTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX653QSTZ?
ZTX653QSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX653QSTZ 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 ZTX653QSTZ?
For technical support, including ZTX653QSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX653QSTZ requirements.
6.How does Aetrix verify that ZTX653QSTZ is sourced from the original manufacturer or authorized distributors?
All ZTX653QSTZ 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 ZTX653QSTZ meets industry standards.
7.What is the process for return or replacement of ZTX653QSTZ?
All ZTX653QSTZ units undergo pre-shipment inspection (PSI). If there is an issue with ZTX653QSTZ, 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 ZTX653QSTZ part is unused and in its original packaging.
Return procedure for ZTX653QSTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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