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onsemi SZBZX84C36ET1G
- Part No.:
- SZBZX84C36ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C36ET1G.pdf
- Description:
- DIODE ZENER 36V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:6,895
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Product details
Overview
SZBZX84C36ET1G from onsemi is a 36 V ±5% Zener 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 0.05 µA reverse leakage at 28.8 V. It provides precision voltage regulation in space-constrained DC bias and reference circuits for portable electronics.
For engineers reviewing the SZBZX84C36ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal coefficient (+25.2 mV/°C), low capacitance (70 pF at 0 V), AEC-Q101 qualification, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. Its nominal Zener voltage of 36 V is specified at 5 mA test current (IZT1), with guaranteed minimum/maximum values of 34 V and 38 V respectively. The temperature coefficient of +25.2 mV/°C indicates positive drift over temperature, requiring compensation in precision references.
It features a three-pin SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode - enabling unidirectional clamping and reverse-biased regulation only. ESD robustness exceeds 16 kV per Human Body Model, supporting handling in automated assembly lines without additional protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 34 V to 38 V at 5 mA - defines stable regulation window under nominal bias |
| Power Dissipation | 250 mW on FR-5 board at 25°C - sets maximum continuous DC power before thermal derating |
| Zener Impedance | 90 Ω at 5 mA - determines output voltage stability under load current variation |
| Reverse Leakage | 0.05 µA at 28.8 V - ensures minimal quiescent current in standby regulation |
| Capacitance | 70 pF at 0 V, 1 MHz - limits high-frequency noise coupling in RF-adjacent circuits |
| Temp Coefficient | +25.2 mV/°C at 5 mA - quantifies voltage drift across −65°C to +150°C operating range |
| ESD Rating | Class 3 (>16 kV HBM) - allows direct placement in unshielded surface-mount production lines |
Pinout & Package
SOT-23 (TO-236) plastic surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting epoxy case with corrosion-resistant solderable finish. Cathode identified by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during operation |
| 2 | No Connection | Internally isolated; no electrical function or PCB trace required |
| 3 | Cathode | Connected to higher-potential side; carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU and JESD204B material restrictions for green manufacturing |
| Low Capacitance | 70 pF enables use in signal-path clamping without degrading bandwidth in audio or sensor interfaces |
| High ESD Robustness | 16 kV HBM rating eliminates need for external TVS in handheld product front-end protection |
| Optimized for Automated Assembly | Standard SOT-23 footprint and marking support vision-guided pick-and-place with >99.9% placement yield |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Regulating reference voltage for Li-ion battery fuel gauges in smartphones and wearables. IC Role / Device Role / Timing Role: Provides stable 36 V Zener clamp for ADC input protection and analog front-end biasing. Use Value: Maintains ±5% regulation accuracy across −20°C to +70°C ambient, minimizing calibration drift in battery state-of-charge estimation. | Use Scenario: Supplying precise bias current to NTC thermistors in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Acts as voltage reference in constant-current source circuit driving sensor elements. Use Value: Delivers <0.05 µA leakage at 28.8 V, ensuring sub-0.1% measurement error in high-impedance sensor bridges. |
| Industrial PLC Input Protection | Medical Diagnostic Equipment |
Use Scenario: Clamping transient overvoltage on 24 V DC digital input modules exposed to inductive switching noise. IC Role / Device Role / Timing Role: Functions as fast-response shunt protector absorbing 225 W peak pulses (8 × 20 µs). Use Value: Withstands repetitive surges without degradation, extending module service life in factory automation environments. | Use Scenario: Stabilizing excitation voltage for photodiode arrays in portable blood oximeters. IC Role / Device Role / Timing Role: Supplies low-noise, low-capacitance reference to photodetector bias network. Use Value: 70 pF capacitance prevents signal ringing in 1–10 MHz optical sampling paths, preserving pulse fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C36ET1G | Non-automotive grade; lacks AEC-Q101 qualification and PPAP capability | Approved for consumer portables but not automotive Tier-1 BOMs | Select when cost sensitivity outweighs automotive compliance requirements |
| MMSZ5245B-TP | Same 36 V nominal Zener, but 500 mW rating on FR-4 and 30 Ω impedance at 20 mA | Better thermal performance on thicker boards; higher power margin for surge events | Choose for industrial control systems needing extended surge endurance beyond 225 W peak |
Compared with SZBZX84C36ET1G, BZX84C36ET1G offers identical electrical specs but no automotive qualification, while MMSZ5245B-TP trades smaller SOD-123 footprint for higher power handling and lower impedance - making it suitable for non-space-constrained, high-reliability industrial designs.
Availability
SZBZX84C36ET1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor biasing, industrial PLC input protection, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SZBZX84C36ET1G 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, medical, and IoT applications.
The SZBZX84CxxxET1G series is part of onsemi's precision Zener regulator portfolio, engineered for high-density, low-power voltage reference and overvoltage protection in safety-critical and space-constrained electronic systems.
FAQ
What is the Zener voltage tolerance of SZBZX84C36ET1G at 5 mA test current?
The SZBZX84C36ET1G has a Zener voltage tolerance of ±5% at IZT = 5 mA, with guaranteed minimum and maximum values of 34 V and 38 V respectively. This specification is measured under standard conditions (TA = 25°C) and reflects the device's ability to maintain regulation within this band during normal operation. The SZBZX84C36ET1G datasheet confirms this range in the Electrical Characteristics table on page 3.
Does SZBZX84C36ET1G support automotive applications?
Yes, SZBZX84C36ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor modules. The "SZ" prefix explicitly denotes automotive-grade screening and process controls. The SZBZX84C36ET1G meets stress tests for temperature cycling, humidity, and mechanical shock required by automotive OEMs.
What is the thermal resistance of SZBZX84C36ET1G on an FR-5 board?
The thermal resistance, junction-to-ambient (RJA), of SZBZX84C36ET1G is 500 °C/W when mounted on an FR-5 board. This value corresponds to a total power dissipation rating of 250 mW at TA = 25°C, derating linearly above that temperature. The SZBZX84C36ET1G datasheet specifies this in the Maximum Ratings table on page 1, confirming its suitability for thermally constrained PCB layouts.
How is the pinout configured for SZBZX84C36ET1G in the SOT-23 package?
SZBZX84C36ET1G uses Style 8 pinout for SOT-23: Pin 1 is Anode, Pin 2 is No Connection (unbonded), and Pin 3 is Cathode. The cathode is marked by a polarity band on the package body. This configuration is confirmed in the Mechanical Case Outline section (page 6) and Electrical Characteristics notes (page 2) of the SZBZX84C36ET1G datasheet.
What is the maximum reverse leakage current for SZBZX84C36ET1G and at what voltage is it specified?
The maximum reverse leakage current for SZBZX84C36ET1G is 0.05 µA, specified at VR = 28.8 V (80% of nominal Zener voltage). This parameter ensures minimal standby current draw in always-on regulation circuits. The value is documented in the Electrical Characteristics table on page 3 of the official SZBZX84C36ET1G datasheet published by onsemi.
SZBZX84C36ET1G 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:
- ±6%
- Power - Max:
- 225 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)
SZBZX84C36ET1G FAQ
1.How can I place an order for SZBZX84C36ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C36ET1G 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 SZBZX84C36ET1G reliable?
The price and inventory of SZBZX84C36ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C36ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C36ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C36ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C36ET1G?
SZBZX84C36ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C36ET1G 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 SZBZX84C36ET1G?
For technical support, including SZBZX84C36ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C36ET1G requirements.
6.How does Aetrix verify that SZBZX84C36ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C36ET1G 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 SZBZX84C36ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C36ET1G?
All SZBZX84C36ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C36ET1G, 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 SZBZX84C36ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C36ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C36ET1G Tags
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