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onsemi SZBZX84C56LT1G
- Part No.:
- SZBZX84C56LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C56LT1G.pdf
- Description:
- DIODE ZENER 56V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,345
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Product details
Overview
SZBZX84C56LT1G from onsemi is a 56 V ±7% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 200 Ω dynamic impedance at 5 mA test current and 110 µA max reverse leakage at 44.8 V. It provides precision voltage regulation in space-constrained portable electronics and high-density PCBs.
For engineers reviewing the SZBZX84C56LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±7%), thermal coefficient (+39.2 mV/°C), ESD rating (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable DC voltage clamping and regulation under reverse bias. Its Zener breakdown mechanism delivers predictable conduction onset at 56 V nominal with defined temperature drift behavior.
The SOT-23 package supports automated surface-mount assembly and features a no-connection terminal (Pin 2), enabling simplified layout while maintaining thermal performance up to 150°C junction temperature. The device meets Class 3 ESD immunity and is Pb-free/RoHS compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 52–60 V at 5 mA test current - defines regulated output range for clamp/reference circuits |
| Power Dissipation | 250 mW on FR-5 board - sets maximum continuous power handling without heatsinking |
| Zener Impedance | 200 Ω at 5 mA - determines regulation stiffness and AC ripple rejection capability |
| Reverse Leakage | 110 µA max at 44.8 V - specifies minimum off-state current in regulation mode |
| Temp Coefficient | +39.2 mV/°C at 5 mA - quantifies voltage drift over temperature for stability-critical designs |
| Capacitance | 40 pF at 0 V, 1 MHz - impacts high-frequency noise filtering and signal integrity |
| ESD Rating | Class 3 (>16 kV HBM) - ensures robustness against electrostatic discharge during handling and assembly |
Pinout & Package
Package: SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; cathode indicated by band; UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry / reverse bias cathode-side connection point |
| 2 | No Connection | Internally unconnected terminal - must remain floating in PCB layout |
| 3 | Cathode | Forward current exit / reverse bias voltage reference node; marked with polarity band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control modules and ADAS sensors |
| Tight Thermal Stability | +39.2 mV/°C tempco enables predictable voltage shift across −65°C to +150°C operating range |
| High ESD Robustness | Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld interfaces |
| Space-Efficient Packaging | SOT-23 footprint (2.9 × 1.3 mm) supports >2× higher component density vs. DO-35 |
| Pb-Free & RoHS Compliant | Meets global environmental regulations without compromising solderability or reliability |
Applications
| Portable Power Management | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Voltage clamping in Li-ion battery protection circuits for smartphones and wearables. IC Role / Device Role / Timing Role: Zener diode acting as overvoltage shunt regulator on battery monitor IC supply rail. Use Value: Prevents damage to low-voltage analog front-ends during surge events using only 2.9 × 1.3 mm PCB area. |
Use Scenario: Reference voltage stabilization for pressure and temperature sensors in engine control units. IC Role / Device Role / Timing Role: Precision Zener providing stable 56 V bias for sensor excitation circuitry. Use Value: Maintains <±1% regulation accuracy across −40°C to +125°C ambient with AEC-Q101 validation. |
| Industrial I/O Protection | Medical Diagnostic Equipment |
|
Use Scenario: Input overvoltage protection on 24 V industrial PLC analog input modules. IC Role / Device Role / Timing Role: Clamp diode limiting transient spikes to protect downstream ADC and op-amp stages. Use Value: Absorbs 250 mW surges without derating, eliminating need for larger TVS diodes in compact modules. |
Use Scenario: Voltage reference in portable ultrasound probe power supplies. IC Role / Device Role / Timing Role: Stable Zener source for high-precision DAC biasing in battery-powered imaging systems. Use Value: Delivers 56 V reference with <0.5% drift over medical-grade operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C56LT1G | Same electrical specs but non-automotive grade; lacks AEC-Q101 qualification and PPAP support | Not suitable for automotive production; acceptable for consumer portables and industrial prototypes | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C56LT3G | Identical electrical and mechanical specs; differs only in tape-and-reel packaging (10,000 pcs vs. 3,000 pcs) | No functional difference; used for high-volume automated assembly lines requiring larger reels | Select for volume manufacturing with pick-and-place equipment optimized for 10k reels |
Compared with SZBZX84C56LT1G, BZX84C56LT1G offers identical regulation performance but omits automotive qualification, while SZBZX84C56LT3G provides identical functionality in higher-density packaging-enabling trade-offs between compliance assurance and production logistics.
Availability
SZBZX84C56LT1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor interfaces, and industrial I/O protection requiring stable component supply across extended temperature ranges and high-reliability environments.
Supply support for SZBZX84C56LT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and medical applications.
SZBZX84C56LT1G belongs to the SZBZX84CxxxLT1G series of automotive-qualified Zener regulators, engineered specifically for voltage reference and overvoltage protection in safety-critical and high-density electronic systems.
FAQ
What is the nominal Zener voltage and tolerance of SZBZX84C56LT1G?
The SZBZX84C56LT1G has a nominal Zener voltage of 56 V with a tolerance of ±7%, specified at 5 mA test current. This means its actual breakdown voltage falls within 52–60 V under standard conditions. The device maintains this specification across its full operating temperature range and is validated per AEC-Q101 for automotive use. SZBZX84C56LT1G's tight tolerance supports reliable voltage clamping in precision analog circuits.
Does SZBZX84C56LT1G have an internal connection on Pin 2?
No, Pin 2 of SZBZX84C56LT1G is internally not connected (NC). The device uses a three-terminal SOT-23 package with active terminals only on Pin 1 (Anode) and Pin 3 (Cathode). Pin 2 must remain unconnected on the PCB to avoid unintended parasitic paths or thermal stress. This configuration is confirmed in the official onsemi datasheet, Section "Mechanical Characteristics" and "Marking Diagram".
Is SZBZX84C56LT1G suitable for automotive applications?
Yes, SZBZX84C56LT1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its construction meets stringent automotive reliability standards, including extended temperature operation (−65°C to +150°C), high ESD immunity (>16 kV HBM), and process-controlled manufacturing. SZBZX84C56LT1G is explicitly designated with the "SZ" prefix for automotive and other applications requiring unique site and control change requirements.
What is the maximum power dissipation of SZBZX84C56LT1G on FR-5 board?
SZBZX84C56LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature, with derating of 2.0 mW/°C above that point. This rating assumes standard JEDEC-defined board conditions (1.0 × 0.75 × 0.62 in.). Exceeding this limit risks thermal runaway or accelerated degradation. The device also supports 300 mW on alumina substrate, but SZBZX84C56LT1G's primary design target remains compact FR-5 PCBs in portable and automotive systems.
How does the temperature coefficient affect SZBZX84C56LT1G's regulation accuracy?
SZBZX84C56LT1G has a positive temperature coefficient of +39.2 mV/°C at 5 mA, meaning its Zener voltage increases linearly with rising junction temperature. Over a 100°C range, this results in ~3.92 V shift - critical for high-accuracy references. Designers must account for this drift in closed-loop feedback or calibration routines. SZBZX84C56LT1G's coefficient is tightly controlled and documented in the datasheet's "Electrical Characteristics" table, enabling precise compensation in temperature-sensitive applications.
SZBZX84C56LT1G 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):
- 56 V
- Tolerance:
- ±7%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 39.2 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)
SZBZX84C56LT1G FAQ
1.How can I place an order for SZBZX84C56LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C56LT1G 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 SZBZX84C56LT1G reliable?
The price and inventory of SZBZX84C56LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C56LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C56LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C56LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C56LT1G?
SZBZX84C56LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C56LT1G 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 SZBZX84C56LT1G?
For technical support, including SZBZX84C56LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C56LT1G requirements.
6.How does Aetrix verify that SZBZX84C56LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C56LT1G 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 SZBZX84C56LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C56LT1G?
All SZBZX84C56LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C56LT1G, 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 SZBZX84C56LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C56LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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