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Diodes Incorporated ZTX751STZ
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- Part No.:
- ZTX751STZ
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX751STZ.pdf
- Description:
- TRANS PNP 60V 2A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
ZTX751STZ from Diodes Incorporated is a PNP silicon planar medium-power bipolar junction transistor (BJT) designed for linear amplification and switching in industrial power control stages. It features -60 V VCEO, -2 A continuous collector current, 1 W power dissipation at 25°C, 140 MHz transition frequency, and low saturation voltage down to -0.15 V at IC = -1 A / IB = -100 mA - used in DC-DC converter output stage drivers.
For engineers reviewing the ZTX751STZ datasheet, ZTX751STZ pinout, ZTX751STZ application, or ZTX751STZ equivalent, key selection criteria include verified PNP polarity, TO-92-compatible E-Line package thermal resistance (Rth(j-amb) = 175 °C/W on PCB), safe operating area under pulsed loads, and confirmed VCE(sat) performance at IC ≥ -2 A.
Technical Context
This BJT operates in common-emitter configuration with guaranteed breakdown ratings: V(BR)CEO = -60 V at IC = -10 mA and V(BR)CBO = -80 V at IC = -100 µA. Its fT = 140 MHz at IC = -100 mA and VCE = -5 V supports high-speed switching in PWM-controlled power stages.
Thermal design relies on Rth(j-amb) = 175 °C/W (free air) and 116 °C/W (1 sq. in. copper PCB), with derating starting above 25°C at 5.7 mW/°C. Safe operating area curves confirm single-pulse capability up to 10 A for 100 µs at VCE = -10 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - maximum allowable collector-emitter voltage before avalanche conduction in active/saturation modes |
| IC (cont.) | -2 A - continuous DC collector current rating defining steady-state power stage capacity |
| Ptot | 1 W at Tamb = 25°C - sets thermal limit for PCB-mounted operation without heatsink |
| VCE(sat) | -0.15 V @ IC = -1 A, IB = -100 mA - enables <0.15 W conduction loss per device in saturated switch applications |
| fT | 140 MHz @ IC = -100 mA, VCE = -5 V - determines usable bandwidth for RF driver or fast-switching control loops |
| toff | 450 ns @ IC = -500 mA, VCC = -10 V - defines minimum dead-time requirement in half-bridge gate drive circuits |
| Rth(j-amb) | 175 °C/W - thermal resistance limiting junction temperature rise to ≤125°C at 1 W dissipation in free air |
Pinout & Package
Package: TO-92-compatible E-Line molded plastic case with emitter (E), base (B), and collector (C) leads arranged in straight-line configuration. Leads are tinned and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current source terminal for PNP operation | Connected to higher potential rail; carries full load current in common-emitter switches |
| B (Base) | Control input for minority-carrier injection | Requires negative bias relative to emitter to turn on; drives with -100 mA typical for full saturation |
| C (Collector) | Current sink terminal | Connected to load return path; voltage swing limited to -60 V max to avoid breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | -0.15 V at IC = -1 A reduces conduction losses by >40% vs. standard PNP transistors in 24 V industrial controls |
| High fT | 140 MHz enables use in 100 kHz–500 kHz PWM drivers without gain roll-off penalties |
| Robust SOA | Rated for 10 A/100 µs pulses supports inductive kick handling in relay and solenoid drivers |
| Wide Tj range | -55°C to +200°C junction operation allows deployment in under-hood automotive modules and motor drive enclosures |
Applications
| Industrial DC-DC Converter Output Stage | Automotive Relay Driver |
|---|---|
Use Scenario: High-side switching of 12–24 V loads in isolated buck-derived converters with synchronous rectification. IC Role / Device Role / Timing Role: PNP BJT configured as emitter-follower to drive N-channel MOSFET gates with fast turn-on/turn-off. Use Value: -0.15 V VCE(sat) minimizes gate-drive voltage drop, preserving MOSFET RDS(on) margin at 100 kHz switching. | Use Scenario: Driving 12 V automotive relays (e.g., HVAC blower, fuel pump) from microcontroller GPIO pins. IC Role / Device Role / Timing Role: Medium-power PNP switch sinking relay coil current with integrated base resistor network. Use Value: -2 A IC rating handles 1.8 A relay inrush peaks; 450 ns toff prevents contact chatter during rapid cycling. |
| Programmable Current Sink | Linear Voltage Regulator Pass Element |
Use Scenario: Precision constant-current source for LED arrays or sensor biasing in factory automation sensors. IC Role / Device Role / Timing Role: PNP configured in common-emitter with op-amp feedback controlling base voltage. Use Value: hFE = 125–225 across 0.01–1 A ensures stable loop gain; low VCE(sat) maintains headroom below 0.5 V. | Use Scenario: Pass transistor in adjustable 3–15 V linear regulators powering analog front-ends in test equipment. IC Role / Device Role / Timing Role: Series pass element dissipating up to 0.8 W while maintaining ±1% output regulation. Use Value: Rth(j-amb) = 175 °C/W allows operation at 85°C ambient without heatsink; -60 V VCEO supports 48 V input designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD2955G | TO-220 package, higher Ptot = 115 W, lower fT = 30 kHz, VCEO = -60 V | Requires heatsink; suited for >5 A continuous loads but not high-frequency switching | Select when thermal budget exceeds 1 W and switching frequency < 20 kHz |
| BC807-40 | SOT-23 package, IC = -500 mA, Ptot = 310 mW, VCEO = -45 V | Not suitable for >0.5 A loads or >45 V rails; optimized for space-constrained logic-level switching | Select only for low-power signal inversion or GPIO buffering where footprint is critical |
Compared with MJD2955G and BC807-40, ZTX751STZ uniquely balances TO-92 mountability, 2 A current capability, and 140 MHz fT - making it optimal for compact, medium-speed power switching where thermal mass and board area are constrained.
Availability
ZTX751STZ is available at Aetrix Electronics and suitable for industrial DC-DC converters, automotive relay drivers, and programmable current sinks requiring stable component supply and long-term manufacturability.
Supply support for ZTX751STZ 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, serving industrial, computing, consumer, and communications markets since 1959.
ZTX751STZ belongs to the ZTX series of high-reliability silicon BJTs engineered for ruggedized power switching in harsh-environment applications including motor control, power supplies, and automotive body electronics.
FAQ
Is ZTX751STZ RoHS compliant and lead-free?
Yes, ZTX751STZ is RoHS compliant and lead-free per Diodes Incorporated's Product Change Notice #PCN-2018-001. The device uses matte tin-plated leads and halogen-free molding compound, meeting JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements for unlimited floor life.
What is the maximum safe operating temperature for ZTX751STZ in continuous operation?
The maximum junction temperature is +200°C, but continuous operation requires limiting Tj to ≤150°C per reliability guidelines. At 1 W dissipation and Rth(j-amb) = 175 °C/W, ambient must stay ≤65°C in free air; with 1 sq. in. copper, ambient can reach 85°C before exceeding 150°C Tj.
Can ZTX751STZ be used in parallel configurations for higher current?
No - ZTX751STZ lacks built-in emitter ballasting resistors and exhibits positive thermal coefficient mismatch. Parallel operation risks current hogging and thermal runaway. For >2 A, use a single higher-rated device like MJD2955G or implement external emitter resistors (≥0.1 Ω) with matched devices and shared heatsinking.
Does ZTX751STZ require a base current limiting resistor when driven by a 3.3 V MCU GPIO?
Yes - a base resistor is mandatory. With VBE(sat) ≈ -0.9 V and required IB = -100 mA for full saturation at IC = -1 A, a 3.3 V GPIO must use RB = (3.3 V − 0.9 V)/100 mA = 24 Ω. Lower values risk excessive base current; higher values degrade saturation and increase VCE(sat).
ZTX751STZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 500mA, 2V
- Power - Max:
- 1 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)
ZTX751STZ FAQ
1.How can I place an order for ZTX751STZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX751STZ 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 ZTX751STZ reliable?
The price and inventory of ZTX751STZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX751STZ is usually 5 days.
3.What payment methods are accepted for ZTX751STZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX751STZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX751STZ?
ZTX751STZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX751STZ 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 ZTX751STZ?
For technical support, including ZTX751STZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX751STZ requirements.
6.How does Aetrix verify that ZTX751STZ is sourced from the original manufacturer or authorized distributors?
All ZTX751STZ 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 ZTX751STZ meets industry standards.
7.What is the process for return or replacement of ZTX751STZ?
All ZTX751STZ units undergo pre-shipment inspection (PSI). If there is an issue with ZTX751STZ, 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 ZTX751STZ part is unused and in its original packaging.
Return procedure for ZTX751STZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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