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onsemi SZBZX84C36LT3G
- Part No.:
- SZBZX84C36LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C36LT3G.pdf
- Description:
- DIODE ZENER 36V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C36LT3G from onsemi is a 36 V ±5% Zener voltage regulator diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board at 25°C, with 90 Ω dynamic impedance at 5 mA test current and −55°C to +150°C operating junction temperature range. It provides precision voltage reference and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZBZX84C36LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (500 °C/W), ESD rating (>16 kV HBM), reverse leakage current (≤0.05 μA at 28.8 V), and automotive qualification per AEC-Q101.
Technical Context
This device operates as a two-terminal voltage reference using controlled reverse-biased Zener breakdown. Its 36 V nominal regulation is specified at IZT = 5 mA with ±5% tolerance, and exhibits a positive temperature coefficient of +25.2 mV/°C at that condition.
The SOT-23 package features three terminals: anode (Pin 1), no connection (Pin 2), and cathode (Pin 3). Thermal performance is defined for FR-5 board (250 mW, 500 °C/W) and alumina substrate (300 mW, 417 °C/W), supporting stable operation across industrial and automotive ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 36 V nominal, 34–38 V range at 5 mA - defines stable regulation point for reference or clamp circuits |
| Power Dissipation | 250 mW on FR-5 board - limits continuous current to ~6.9 mA at 36 V without derating |
| Zener Impedance | 90 Ω at 5 mA - determines output voltage stability under load transients |
| Reverse Leakage | ≤0.05 μA at 28.8 V - ensures minimal quiescent current in standby clamp applications |
| Temperature Coefficient | +25.2 mV/°C at 5 mA - quantifies voltage drift with ambient changes; requires thermal design margin |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling in automated assembly and end-use environments |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive and industrial control enclosures |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish, UL 94 V-0 flammability rating, and cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; must be held ≤36 V below cathode for regulation |
| 2 | No Connection | Internally unconnected; electrically isolated; no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; carries full Zener current during regulation or clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and body electronics |
| Pb-Free & RoHS compliant | Meets global environmental regulations; compatible with lead-free reflow profiles up to 260°C for 10 s |
| Tight thermal resistance control | 500 °C/W junction-to-ambient on FR-5 enables predictable thermal rise in high-density layouts |
| High ESD immunity | Class 3 human-body-model rating eliminates need for external ESD protection in many I/O interfaces |
| Small footprint | SOT-23 package occupies <1 mm² PCB area - ideal for smartphones, wearables, and IoT sensor nodes |
Applications
| USB Power Rail Clamp | Automotive Sensor Reference |
|---|---|
Use Scenario: Clamping 5 V USB supply against transient surges in portable accessories. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as overvoltage protector downstream of USB port. Use Value: Limits rail excursion to ≤36 V during ESD or load-dump events, preserving connected ICs without adding series resistance or delay. | Use Scenario: Providing stable 36 V reference for analog front-end conditioning of exhaust gas sensors. IC Role / Device Role / Timing Role: Precision voltage reference source for ratiometric ADC biasing in harsh-temperature engine compartments. Use Value: Maintains ±5% regulation across −40°C to +125°C ambient, enabling accurate lambda measurement without calibration drift. |
| Portable Device Battery Monitor | Industrial PLC Input Protection |
Use Scenario: Monitoring Li-ion battery pack voltage via resistive divider with regulated reference. IC Role / Device Role / Timing Role: Zener-based reference node for ADC input scaling in handheld medical instruments. Use Value: Delivers 36 V reference with <0.05 μA leakage, minimizing divider current error and extending battery life beyond 100 hours. | Use Scenario: Protecting 24 V DC digital input channels from field-wiring transients in factory automation systems. IC Role / Device Role / Timing Role: Fast-response shunt clamp on PLC input terminal block. Use Value: Absorbs 250 mW surge energy without latch-up, surviving repeated 1 kV/μs fast-risetime spikes per IEC 61000-4-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C36LT1G | Same electrical specs but 3,000-piece tape-and-reel packaging vs. 10,000-piece for SZBZX84C36LT3G; no automotive qualification | Not AEC-Q101 qualified; unsuitable for automotive production or PPAP-controlled programs | Select when cost-sensitive consumer designs require smaller order quantities and automotive compliance is unnecessary |
| SZBZX84C36LT1G | Identical Zener parameters and AEC-Q101 qualification, but shipped in 3,000-piece tape-and-reel format | Same automotive use case support, but lower per-order volume efficiency for high-throughput manufacturing | Select when production lot sizes align with 3k reels or when inventory turnover favors smaller batches |
Compared with BZX84C36LT1G and SZBZX84C36LT1G, the SZBZX84C36LT3G offers identical regulation performance and automotive qualification while optimizing procurement logistics through its 10,000-unit reel size-reducing changeover frequency and material handling cost in SMT line operations.
Availability
SZBZX84C36LT3G is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, and portable power management systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for SZBZX84C36LT3G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with emphasis on reliability and sustainability.
The BZX84Cxxx series-including SZBZX84C36LT3G-is designed specifically for compact, high-density voltage regulation and transient suppression in portable and automotive electronics where space, thermal budget, and qualification rigor are critical.
FAQ
What is the Zener voltage tolerance of SZBZX84C36LT3G?
The SZBZX84C36LT3G has a nominal Zener voltage of 36 V with a tolerance of ±5%, meaning the actual breakdown voltage falls between 34 V and 38 V when tested at 5 mA (IZT). This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet, and applies across the full operating temperature range of −55°C to +150°C.
Is SZBZX84C36LT3G suitable for automotive applications?
Yes, SZBZX84C36LT3G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix explicitly indicating compliance for automotive and other applications requiring unique site and process controls. Its construction, testing, and traceability meet automotive-grade reliability standards, making it appropriate for use in engine control units, body electronics, and ADAS sensor interfaces.
What is the maximum power dissipation of SZBZX84C36LT3G on a standard PCB?
SZBZX84C36LT3G is rated for 250 mW total power dissipation on an FR-5 board at 25°C ambient, with thermal derating of 2.0 mW/°C above that temperature. This corresponds to a maximum steady-state Zener current of approximately 6.9 mA at 36 V before reaching the 250 mW limit, assuming no additional board-level heatsinking.
Does SZBZX84C36LT3G have a no-connect pin, and how should it be handled on the PCB?
Yes, SZBZX84C36LT3G has Pin 2 designated as "No Connection" per the mechanical outline (Style 8) and datasheet pinout. This terminal is internally unconnected and must remain electrically floating-no PCB trace, solder mask opening, or copper pour should contact it. Leaving it unconnected avoids parasitic coupling and ensures specified Zener impedance and leakage performance.
What is the reverse leakage current specification for SZBZX84C36LT3G?
The reverse leakage current for SZBZX84C36LT3G is specified as ≤0.05 μA at VR = 28.8 V (80% of nominal Zener voltage), measured at 25°C. This low leakage ensures minimal current draw in standby clamp or reference configurations, supporting ultra-low-power designs such as battery-operated IoT endpoints and medical wearables.
SZBZX84C36LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 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)
SZBZX84C36LT3G FAQ
1.How can I place an order for SZBZX84C36LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C36LT3G 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 SZBZX84C36LT3G reliable?
The price and inventory of SZBZX84C36LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C36LT3G is usually 5 days.
3.What payment methods are accepted for SZBZX84C36LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C36LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C36LT3G?
SZBZX84C36LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C36LT3G 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 SZBZX84C36LT3G?
For technical support, including SZBZX84C36LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C36LT3G requirements.
6.How does Aetrix verify that SZBZX84C36LT3G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C36LT3G 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 SZBZX84C36LT3G meets industry standards.
7.What is the process for return or replacement of SZBZX84C36LT3G?
All SZBZX84C36LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C36LT3G, 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 SZBZX84C36LT3G part is unused and in its original packaging.
Return procedure for SZBZX84C36LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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