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onsemi SZBZX84C75LT1G
- Part No.:
- SZBZX84C75LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C75LT1G.pdf
- Description:
- DIODE ZENER 75V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,875
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Product details
Overview
SZBZX84C75LT1G from onsemi is a 75 V ±6.7% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 500 Ω dynamic impedance at 20 mA and 140 nA reverse leakage at 60 V, used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C75LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±6.7%), thermal coefficient (+52.5 mV/°C), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under pulse or DC conditions. Its 75 V nominal Zener voltage is specified at test currents of 2 mA, 5 mA, and 20 mA, with corresponding impedance values of 255 Ω, 240 Ω, and 500 Ω respectively.
The temperature coefficient of +52.5 mV/°C indicates positive drift above 6.2 V, requiring thermal derating in ambient temperatures beyond 25°C. Junction-to-ambient thermal resistance is 500 °C/W on FR-5 board, limiting continuous power handling without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 70–79 V at 5 mA (±6.7% tolerance); defines regulated output voltage under nominal bias |
| Power Dissipation | 250 mW on FR-5 board at 25°C; derates 2.0 mW/°C above ambient, limiting usable power in warm environments |
| Zener Impedance | 500 Ω at 20 mA; impacts regulation stability under load transients and ripple rejection |
| Reverse Leakage | 140 nA at 60 V; determines quiescent current draw in standby mode for battery-powered systems |
| Capacitance | 35 pF at 0 V, 1 MHz; affects high-frequency noise coupling and AC signal integrity in filtering applications |
| ESD Rating | Class 3 (>16 kV HBM); enables robust handling during automated assembly and field operation without external protection |
| Thermal Coefficient | +52.5 mV/°C at 5 mA; quantifies voltage drift per degree Celsius, critical for temperature-stable references |
Pinout & Package
Package: SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm, Pb-free, RoHS compliant, cathode marked by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation; carries forward current in clamp mode |
| 2 | No Connection | Internally unconnected; electrically isolated; must not be soldered or routed to avoid parasitic coupling |
| 3 | Cathode | Connected to higher-potential node; voltage reference output point; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| Tight thermal coefficient control | +52.5 mV/°C enables predictable voltage drift compensation in industrial sensor front-ends |
| Pb-free and RoHS compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260°C for 10 seconds |
| High ESD immunity | Class 3 (>16 kV HBM) eliminates need for external TVS in handheld device I/O protection circuits |
| Optimized SOT-23 footprint | Enables placement in <1.5 mm pitch layouts; supports automated pick-and-place with standard nozzles |
Applications
| Portable Power Rail Clamping | Automotive Sensor Reference |
|---|---|
|
Use Scenario: Protects 75 V battery management IC inputs from load-dump transients in 48 V mild-hybrid vehicles. IC Role / Device Role / Timing Role: Zener clamping diode providing fast overvoltage shutdown path to ground. Use Value: Limits peak input voltage to ≤80 V using 75 V nominal breakdown, preventing latch-up in analog front-end amplifiers. |
Use Scenario: Supplies stable 75 V reference for isolated current-sense amplifier biasing in EV traction inverters. IC Role / Device Role / Timing Role: Precision voltage reference source with low tempco for calibration-critical measurement paths. Use Value: Maintains ±0.5% reference accuracy across −40°C to +125°C due to AEC-Q101 validation and +52.5 mV/°C TC. |
| Industrial PLC Input Protection | Medical Imaging HV Bias Stabilization |
|
Use Scenario: Shields 72–80 V programmable logic controller analog input channels from EFT and surge events. IC Role / Device Role / Timing Role: Primary overvoltage clamp in multi-stage protection network with series resistor and TVS. Use Value: Absorbs 250 mW pulses without degradation, enabling compliance with IEC 61000-4-4 Level 4 (2 kV) |
Use Scenario: Stabilizes bias voltage for photomultiplier tube (PMT) anode chains operating near 75 V in PET scanners. IC Role / Device Role / Timing Role: Low-noise Zener reference minimizing dark-current drift in ultra-low-light detection circuits. Use Value: 35 pF capacitance and 140 nA leakage prevent signal coupling and baseline shift in high-gain amplification stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C75LT1G | Standard-grade version; same 70–79 V range and SOT-23 package but lacks AEC-Q101 qualification and automotive traceability | Approved for commercial/industrial use only; not suitable for automotive production or PPAP submissions | Select when cost sensitivity outweighs automotive compliance requirements and full lifecycle documentation is unnecessary |
| SZBZX84C75LT3G | Identical electrical specs and AEC-Q101 qualification, but supplied in 10,000-piece tape-and-reel vs. 3,000-piece for SZBZX84C75LT1G | Optimized for high-volume automated assembly; requires different feeder setup and inventory planning | Choose for large-scale manufacturing where reel size aligns with SMT line throughput and material planning cycles |
Compared with BZX84C75LT1G, SZBZX84C75LT1G adds automotive qualification and traceability without altering voltage or thermal performance; compared with SZBZX84C75LT3G, it offers smaller reel quantity for prototyping and low-volume production flexibility.
Availability
SZBZX84C75LT1G is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and medical imaging equipment requiring stable component supply with full AEC-Q101 documentation and PPAP support.
Supply support for SZBZX84C75LT1G 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
onsemi is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
SZBZX84C75LT1G belongs to the SZBZX84CxxxLT1G automotive Zener regulator series, engineered for reliable voltage reference and transient suppression in harsh-environment electronic control units.
FAQ
What is the Zener voltage tolerance of SZBZX84C75LT1G?
The SZBZX84C75LT1G has a Zener voltage range of 70 V to 79 V at 5 mA test current, corresponding to a ±6.7% tolerance around the nominal 75 V value. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet, and applies specifically to the SZ-prefix automotive variant.
Is SZBZX84C75LT1G pin-compatible with BZX84C75LT1G?
Yes, SZBZX84C75LT1G is pin-compatible with BZX84C75LT1G - both use identical SOT-23 packaging with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. The SZ prefix denotes automotive qualification and traceability enhancements, not physical or electrical pinout changes.
What is the maximum power dissipation for SZBZX84C75LT1G on FR-5 board?
SZBZX84C75LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, with linear derating of 2.0 mW/°C above that temperature. This value is specified in the Maximum Ratings table on page 2 of the onsemi datasheet and applies directly to the SZBZX84C75LT1G part number.
Does SZBZX84C75LT1G meet AEC-Q101 requirements?
Yes, SZBZX84C75LT1G is explicitly AEC-Q101 qualified and PPAP capable, as stated in the Features section on page 1 of the onsemi datasheet. The "SZ" prefix denotes devices meeting automotive site and control change requirements, distinguishing them from standard BZX84CxxxLT1G parts.
What is the reverse leakage current specification for SZBZX84C75LT1G?
SZBZX84C75LT1G exhibits a maximum reverse leakage current of 140 nA at VR = 60 V, as listed in the Electrical Characteristics table on page 3. This parameter is measured at TA = 25°C and defines the off-state current draw in voltage-clamp or reference configurations.
SZBZX84C75LT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZBZX84C75LT1G FAQ
1.How can I place an order for SZBZX84C75LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C75LT1G 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 SZBZX84C75LT1G reliable?
The price and inventory of SZBZX84C75LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C75LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C75LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C75LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C75LT1G?
SZBZX84C75LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C75LT1G 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 SZBZX84C75LT1G?
For technical support, including SZBZX84C75LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C75LT1G requirements.
6.How does Aetrix verify that SZBZX84C75LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C75LT1G 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 SZBZX84C75LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C75LT1G?
All SZBZX84C75LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C75LT1G, 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 SZBZX84C75LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C75LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C75LT1G Tags
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