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Diodes Incorporated ZTX653STZ
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- Part No.:
- ZTX653STZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX653STZ.pdf
- Description:
- TRANS NPN 100V 2A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:3,866
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Product details
Overview
ZTX653STZ from Diodes Incorporated is an NPN silicon planar medium-power transistor rated for 100 V VCEO, 2 A continuous collector current, and 1 W power dissipation at Tamb = 25°C, with low VCE(sat) (0.13 V typ. at IC = 1 A, IB = 100 mA). It is used in linear regulators, relay drivers, and DC-DC converter switch stages.
For engineers reviewing the ZTX653STZ datasheet, ZTX653STZ pinout, ZTX653STZ application, or ZTX653STZ equivalent, key selection criteria include verified VCEO = 100 V, IC = 2 A rating, TO-92-compatible 3-223 package thermal resistance (Rth(j-amb) = 116 °C/W on PCB), and documented fT = 175 MHz performance under pulsed conditions.
Technical Context
The ZTX653STZ operates as a general-purpose NPN switching and amplification device with a minimum current gain hFE of 100 at IC = 1 A, VCE = 2 V. Its safe operating area supports single-pulse operation up to 10 A at 10 µs, with defined derating above 25°C ambient.
It features low saturation voltage (VCE(sat) ≤ 0.3 V max at IC = 2 A, IB = 200 mA) and fast switching times (ton = 80 ns, toff = 1200 ns), enabling efficient use in medium-speed switching applications where thermal management on standard PCB copper is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 100 V - maximum allowable collector-emitter voltage before breakdown under open-base condition |
| IC (continuous) | 2 A - maximum DC collector current sustainable with proper heatsinking and ambient control |
| Ptot @ 25°C | 1 W - total power dissipation limit at 25°C ambient; derates 5.7 mW/°C above that temperature |
| VCE(sat) | 0.13 V (typ.) - low saturation voltage enables reduced conduction loss in switching circuits |
| fT | 175 MHz - transition frequency confirms suitability for medium-frequency amplifier and switching stages |
| Rth(j-amb) | 116 °C/W - thermal resistance when mounted on 1 in² PCB copper, defining junction-to-ambient temperature rise per watt |
Pinout & Package
Package: TO-92-compatible 3-223 outline (E-Line), epoxy-molded, through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Reference node for biasing; connects to ground or low-side return path in common-emitter configurations |
| Base (B) | Control input | Receives drive current to modulate collector current; requires external current-limiting resistor in most applications |
| Collector (C) | Current source terminal | Connects to load or supply rail; carries full switched current and must be routed with adequate trace width for 2 A |
Key Features
| Feature | Design Value |
|---|---|
| High VCEO rating | 100 V enables use in 48 V industrial bus and offline auxiliary supplies without cascading devices |
| Low VCE(sat) | 0.13 V typical reduces power loss by >30% vs. legacy transistors at 1 A, improving thermal margin |
| 175 MHz fT | Supports stable gain in audio preamps and switching frequencies up to ~10 MHz with controlled edge rates |
| TO-92-compatible footprint | 3-223 outline allows drop-in replacement in legacy designs using ZTX652 or similar through-hole NPNs |
Applications
| Linear Regulator Pass Element | Relay Driver Stage |
|---|---|
Use Scenario: Used as series pass transistor in adjustable 3-terminal linear regulators delivering up to 1.5 A output. IC Role / Device Role / Timing Role: Acts as controllable current source modulated by error amplifier feedback loop. Use Value: Low VCE(sat) minimizes dropout voltage and heat generation at full load, extending regulator thermal headroom. | Use Scenario: Drives 12 V/24 V electromagnetic relays in PLC I/O modules and HVAC controllers. IC Role / Device Role / Timing Role: Serves as saturated switch turning relay coil on/off with TTL/CMOS-compatible base drive. Use Value: 2 A IC rating accommodates relay inrush currents; 100 V VCEO withstands flyback spikes without snubber. |
| DC-DC Converter Switch | Audio Amplifier Pre-driver |
Use Scenario: Functions as main switch in non-synchronous buck converters for point-of-load regulation in embedded systems. IC Role / Device Role / Timing Role: Conducts high-current pulses during on-time; blocks input voltage during off-time. Use Value: 175 MHz fT and 80 ns ton support clean switching at 500 kHz–1 MHz with minimal overlap loss. | Use Scenario: Provides current gain stage between op-amp output and Class-AB power output transistors in 1–5 W audio amplifiers. IC Role / Device Role / Timing Role: Delivers linear current amplification with stable hFE across 10 mA–1 A range. Use Value: hFE ≥ 100 at IC = 1 A ensures predictable bias stability and low distortion in mid-band operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZTX653 (non-STZ variant) | Same die and electrical specs; STZ suffix denotes tape-and-reel packaging and extended quality screening | No functional difference in circuit behavior; STZ version preferred for automated assembly | Select ZTX653STZ for SMT line compatibility and traceable lot control |
| MJD122G | Higher Ptot (1.5 W), TO-220 package, VCEO = 100 V, but slower fT (100 MHz) and higher VCE(sat) (0.5 V min) | Suitable for higher-power, lower-frequency switching where PCB space permits larger package | Choose MJD122G only when thermal budget exceeds 1 W or TO-92 footprint is unavailable |
Compared with ZTX653STZ, the ZTX653 offers identical performance in bulk form but lacks STZ's assembly-ready packaging and screening; MJD122G trades speed and saturation voltage for higher power handling and different thermal interface requirements.
Availability
ZTX653STZ is available at Aetrix Electronics and suitable for linear regulators, relay drivers, DC-DC converter switches, and audio pre-drivers requiring stable component supply and consistent TO-92-compatible mechanical fit.
Supply support for ZTX653STZ 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, cost-optimized components for industrial, computing, and consumer markets.
The ZTX653STZ belongs to Diodes' legacy bipolar transistor product line, designed specifically for robust, medium-power linear and switching applications where TO-92 compatibility, thermal predictability, and proven reliability are essential.
FAQ
What is the maximum safe operating temperature for the ZTX653STZ junction?
The ZTX653STZ has a specified junction temperature range of −55°C to +200°C. For reliable long-term operation, junction temperature should be kept below 150°C under continuous load, considering its Rth(j-amb) = 116 °C/W on 1 in² PCB copper and 1 W power limit at 25°C ambient.
Can ZTX653STZ replace ZTX652 in existing designs?
Yes - ZTX653STZ is explicitly recommended as a direct replacement for ZTX652, offering improved VCEO (100 V vs. 80 V), same pinout and package (3-223), and identical thermal and switching characteristics. Diodes Incorporated states ZTX652 is "Not Recommended for New Design."
Is ZTX653STZ suitable for PWM motor control at 20 kHz?
Yes - with ton = 80 ns and toff = 1200 ns, ZTX653STZ supports clean switching at 20 kHz PWM, provided gate/base drive is optimized (IB ≥ 200 mA for full 2 A IC) and layout minimizes parasitic inductance to avoid voltage overshoot.
Does ZTX653STZ require a heatsink in 1 W continuous operation?
No - at 1 W dissipation and 25°C ambient, the junction-to-ambient thermal resistance (116 °C/W) results in ΔT = 116°C, yielding Tj ≈ 141°C, within the 200°C absolute max. However, for reliability or higher ambient temperatures, a small copper pour or thermal relief is strongly advised.
ZTX653STZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- 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)
ZTX653STZ FAQ
1.How can I place an order for ZTX653STZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX653STZ 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 ZTX653STZ reliable?
The price and inventory of ZTX653STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX653STZ is usually 5 days.
3.What payment methods are accepted for ZTX653STZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX653STZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX653STZ?
ZTX653STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX653STZ 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 ZTX653STZ?
For technical support, including ZTX653STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX653STZ requirements.
6.How does Aetrix verify that ZTX653STZ is sourced from the original manufacturer or authorized distributors?
All ZTX653STZ 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 ZTX653STZ meets industry standards.
7.What is the process for return or replacement of ZTX653STZ?
All ZTX653STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZTX653STZ, 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 ZTX653STZ part is unused and in its original packaging.
Return procedure for ZTX653STZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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