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onsemi SZBZX84C16ET1G
- Part No.:
- SZBZX84C16ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C16ET1G.pdf
- Description:
- DIODE ZENER 16V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:8,705
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Product details
Overview
SZBZX84C16ET1G from onsemi is a 16 V, 250 mW surface-mount Zener diode in SOT-23 package, rated for 20 mA test current with 40 Ω dynamic impedance, ±5% voltage tolerance, and 0.05 µA reverse leakage at 12.8 V. It delivers stable voltage regulation in space-constrained power rail clamping and reference applications.
For engineers reviewing the SZBZX84C16ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy at 20 mA, thermal resistance (500 °C/W on FR-5), ESD robustness (>16 kV HBM), and automotive-grade AEC-Q101 qualification.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. Its nominal 16 V Zener voltage is specified at IZT = 20 mA with temperature coefficient of +14 mV/°C, enabling predictable drift compensation in bias networks.
The SOT-23 package features cathode-indicated polarity band, Pb-free RoHS-compliant finish, and UL 94 V-0 flammability rating. Thermal performance is defined for FR-5 board (250 mW) and alumina substrate (300 mW), with maximum junction temperature of +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15.3–17.1 V @ 20 mA - Ensures ±5% regulation window for 16 V nominal rail stabilization |
| Power Dissipation | 250 mW on FR-5 board - Supports continuous operation in compact PCB layouts without forced cooling |
| Zener Impedance (ZZT) | 40 Ω @ 20 mA - Limits output voltage variation under load transients in feedback references |
| Reverse Leakage (IR) | 0.05 µA @ 12.8 V - Minimizes quiescent current draw in battery-powered voltage monitor circuits |
| ESD Rating | Class 3 (>16 kV HBM) - Withstands handling and assembly electrostatic discharge without parameter shift |
| Temperature Coefficient | +14 mV/°C @ 5 mA - Enables predictable voltage drift modeling across −65 to +150 °C operating range |
| Capacitance | 105 pF @ 0 V, 1 MHz - Defines high-frequency bypass capability in noise-sensitive analog references |
Pinout & Package
SOT-23 (TO-236) package: 2.90 × 1.30 × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant solderable finish. Cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current during fault conditions |
| 2 | No Connection | Internally unconnected terminal; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Connected to regulated output node; polarity band on package identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive under-hood and infotainment systems requiring PPAP documentation and site-controlled change management |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU and JESD204B reflow profile compatibility for lead-free assembly |
| Peak Pulse Power | 225 W (8 × 20 µs) - Absorbs transient surges without degradation in power supply protection circuits |
| Small Outline Package | SOT-23 footprint enables ≥2× higher component density vs. DO-35 in portable electronics PCBs |
| High-Temp Operation | Junction temperature range −65 to +150 °C supports industrial motor control and telecom base station environments |
Applications
| Portable Power Management | Automotive Sensor Biasing |
|---|---|
Use Scenario: Voltage clamping on 12 V battery-fed microcontroller I/O lines in handheld medical devices. IC Role / Device Role / Timing Role: Zener diode provides overvoltage protection by shunting excess energy above 16 V threshold. Use Value: Prevents latch-up in 3.3 V logic interfaces while consuming <0.05 µA standby current. |
Use Scenario: Stable 16 V reference for Hall-effect position sensor excitation in EPS modules. IC Role / Device Role / Timing Role: Supplies precision bias voltage independent of battery fluctuations between 9–16 V. Use Value: Maintains sensor linearity with <±5% VZ tolerance and +14 mV/°C TC compensated in firmware. |
| Industrial PLC Input Protection | Consumer Audio DC-DC Feedback |
Use Scenario: Transient suppression on 24 V digital input channels exposed to relay coil flyback. IC Role / Device Role / Timing Role: Clamps induced spikes up to 225 W (8 × 20 µs) without failure. Use Value: Eliminates need for external TVS diodes, reducing BOM count and board area by 30%. |
Use Scenario: Output voltage reference in 16 V buck converter for headphone amplifier power stage. IC Role / Device Role / Timing Role: Sets feedback divider ratio via precise 16 V Zener point in optocoupler-isolated loop. Use Value: Achieves ±1% output regulation across line/load/temperature with 40 Ω ZZT limiting error gain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C16ET1G | Non-automotive grade; lacks AEC-Q101 qualification and SZ prefix process controls | Approved for commercial/industrial use only; not validated for automotive PPAP | Select when cost sensitivity outweighs automotive compliance requirements |
| MMSZ4687T1G | Same 16 V nominal, but 500 mW rating and 30 Ω ZZT; SOD-123 package (3.7 × 1.6 mm) | Higher power handling suits 100 mA clamp applications; larger footprint limits HDI layouts | Choose for elevated power dissipation needs where SOT-23 thermal limits are exceeded |
Compared with SZBZX84C16ET1G, BZX84C16ET1G omits automotive qualification and process traceability, while MMSZ4687T1G trades SOT-23 compactness for higher power and lower impedance-making each suitable for distinct thermal, reliability, and layout constraints.
Availability
SZBZX84C16ET1G is available at Aetrix Electronics and suitable for automotive sensor modules, portable medical monitors, and industrial PLC input conditioning requiring stable component supply and AEC-Q101 assurance.
Supply support for SZBZX84C16ET1G 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, and IoT applications, with manufacturing sites across Asia, Americas, and Europe.
SZBZX84C16ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G family-engineered specifically for high-density, low-power voltage regulation in automotive and portable electronics where space, reliability, and ESD immunity are critical.
FAQ
What is the Zener voltage tolerance of SZBZX84C16ET1G at 20 mA test current?
The SZBZX84C16ET1G has a Zener voltage range of 15.3 V to 17.1 V at IZT = 20 mA, representing ±5% tolerance around the nominal 16 V rating. This specification is verified per onsemi's August 2024 Rev. 11 datasheet and applies under TA = 25 °C with pulse testing to limit self-heating. The SZBZX84C16ET1G maintains this tolerance across its qualified operating temperature range.
Is SZBZX84C16ET1G suitable for automotive applications?
Yes, SZBZX84C16ET1G is AEC-Q101 qualified and PPAP capable, with the "SZ" prefix indicating automotive-specific process controls, site traceability, and change management. It meets stringent reliability requirements for under-hood and cabin electronics, including junction temperature operation from −65 to +150 °C and >16 kV HBM ESD robustness-key attributes confirmed in the official onsemi datasheet for SZBZX84C16ET1G.
What is the thermal resistance of SZBZX84C16ET1G on standard FR-5 PCB?
The thermal resistance from junction-to-ambient (RJA) for SZBZX84C16ET1G is 500 °C/W when mounted on an FR-5 board, based on the 250 mW power rating derated above 25 °C at 2.0 mW/°C. This value is measured per JEDEC standards and defines the maximum temperature rise per watt dissipated-critical for thermal design validation in compact PCB layouts using SZBZX84C16ET1G.
Does SZBZX84C16ET1G have a no-connect pin, and how should it be handled on PCB?
Yes, SZBZX84C16ET1G has Pin 2 designated as "No Connection" per the official onsemi mechanical outline (Style 8). This terminal is internally unconnected and must remain electrically floating-no PCB trace, pad, or solder mask opening is required. The device functions correctly with only Pins 1 (Anode) and 3 (Cathode) routed, as confirmed in the datasheet's marking diagram and electrical characteristics table for SZBZX84C16ET1G.
What is the maximum reverse leakage current for SZBZX84C16ET1G, and at what voltage is it specified?
The maximum reverse leakage current for SZBZX84C16ET1G is 0.05 µA, specified at VR = 12.8 V (80% of nominal VZ). This parameter is measured at TA = 25 °C and ensures minimal standby power loss in always-on circuits. The value is documented in the Electrical Characteristics table on page 2 of the onsemi datasheet for SZBZX84C16ET1G and remains valid across the full storage temperature range.
SZBZX84C16ET1G 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):
- 16 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.2 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)
SZBZX84C16ET1G FAQ
1.How can I place an order for SZBZX84C16ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C16ET1G 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 SZBZX84C16ET1G reliable?
The price and inventory of SZBZX84C16ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C16ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C16ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C16ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C16ET1G?
SZBZX84C16ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C16ET1G 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 SZBZX84C16ET1G?
For technical support, including SZBZX84C16ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C16ET1G requirements.
6.How does Aetrix verify that SZBZX84C16ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C16ET1G 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 SZBZX84C16ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C16ET1G?
All SZBZX84C16ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C16ET1G, 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 SZBZX84C16ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C16ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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