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onsemi SZBZX84C7V5ET1G
- Part No.:
- SZBZX84C7V5ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C7V5ET1G.pdf
- Description:
- DIODE ZENER 7.5V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:9,130
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Product details
Overview
SZBZX84C7V5ET1G from onsemi is a 7.5 V ±0.5 V Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 1.0 µA reverse leakage at 5.0 V, used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C7V5ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±0.5 V), thermal coefficient (+2.5 mV/°C), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference with cathode-anode polarity, featuring a nominal Zener breakdown voltage of 7.5 V at 5 mA test current and temperature coefficient of +2.5 mV/°C - indicating positive drift with rising junction temperature. Its 15 Ω Zener impedance at IZT = 5 mA ensures stable regulation under moderate load transients.
The SOT-23 package supports automated placement and reflow soldering, with maximum case temperature of 260°C for 10 seconds. Pin 2 is internally unconnected, eliminating parasitic paths and simplifying layout for single-point grounding in noise-sensitive analog references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.0 V to 7.9 V at 5 mA - defines operating regulation window for 3.3 V or 5 V rail clamping |
| Power Dissipation | 250 mW on FR-5 board at 25°C - limits continuous current to ~33 mA at 7.5 V |
| Zener Impedance (ZZT) | 15 Ω at 5 mA - ensures <150 mV output variation for ±1 mA load changes |
| Reverse Leakage (IR) | 1.0 µA at 5.0 V - negligible quiescent current draw in standby mode |
| Capacitance (C) | 140 pF at 0 V, 1 MHz - impacts high-frequency noise filtering capability |
| ESD Rating | Class 3 (>16 kV HBM) - withstands handling and system-level ESD events without degradation |
| Thermal Coefficient | +2.5 mV/°C at 5 mA - predictable +12.5 mV shift over 5°C ambient change |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish and UL 94 V-0 flammability rating. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during regulation |
| 2 | No Connection | Internally isolated - no PCB trace or pad required |
| 3 | Cathode | Connected to regulated voltage node; carries full Zener current |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling and HTOL |
| Pb-free / RoHS compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
| Peak pulse power | 225 W for 8 × 20 µs waveform - handles transient surges without failure |
| Small footprint | 0.0037 cm² board area - enables placement near IC power pins for local decoupling |
| High-density assembly | Optimized leadframe geometry for >99.9% pick-and-place yield on fine-pitch feeders |
Applications
| USB Power Rail Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamps 5 V USB input to safe level during hot-plug or ESD event. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector in parallel with LDO input. Use Value: Limits transient voltage to ≤8.0 V (max VZ + margin), preventing damage to downstream 5 V tolerant regulators. |
Use Scenario: Generates clean reset threshold for ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in RC-based reset generator. Use Value: Tight 7.0–7.9 V range ensures reset assertion within ±0.45 V across production lot and temperature. |
| Portable Battery Monitor | Industrial Sensor Signal Conditioning |
Use Scenario: Stabilizes reference for ADC measuring Li-ion cell voltage. IC Role / Device Role / Timing Role: Low-drift Zener providing excitation voltage to resistive divider network. Use Value: +2.5 mV/°C TC enables software compensation using onboard temperature sensor. |
Use Scenario: Protects op-amp inputs from induced transients in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting common-mode surge to ±8 V. Use Value: 140 pF capacitance avoids signal distortion up to 100 kHz while suppressing >1 kV spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C7V5ET1G | Non-automotive grade; no AEC-Q101 qualification; identical electrical specs and SOT-23 pinout | Approved for consumer/handheld use only; not validated for automotive temperature cycling or PPAP | Select when cost sensitivity outweighs automotive qualification requirements |
| MMSZ4689T1G | Same 7.5 V nominal Zener, but 350 mW rating on FR-4; higher 30 Ω ZZT at 5 mA; different marking and date code format | Better suited for higher-power transient suppression; less precise for low-current reference use | Choose for applications needing >250 mW pulse handling where tighter impedance is non-critical |
Compared with SZBZX84C7V5ET1G, BZX84C7V5ET1G lacks automotive qualification but matches all electrical parameters, while MMSZ4689T1G trades lower impedance for higher power rating - making it preferable for surge-heavy industrial I/O protection but less optimal for precision biasing.
Availability
SZBZX84C7V5ET1G is available at Aetrix Electronics and suitable for USB power management, microcontroller reset generation, battery monitoring, and industrial sensor conditioning requiring stable component supply and automotive-grade reliability.
Supply support for SZBZX84C7V5ET1G 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.
SZBZX84C7V5ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G Zener regulator family, designed specifically for space-constrained, high-reliability voltage reference and protection in automotive infotainment, ADAS modules, and portable electronics.
FAQ
What is the Zener voltage tolerance of SZBZX84C7V5ET1G at 5 mA test current?
The SZBZX84C7V5ET1G has a Zener voltage range of 7.0 V to 7.9 V at IZT = 5 mA, corresponding to a ±0.5 V deviation from the nominal 7.5 V value. This tolerance is guaranteed across the full operating temperature range of −65°C to +150°C and applies to all units shipped under standard onsemi quality controls.
Is SZBZX84C7V5ET1G qualified for automotive applications?
Yes, SZBZX84C7V5ET1G is AEC-Q101 qualified and PPAP capable, with validation covering temperature cycling, high-temperature operating life, and mechanical shock testing per automotive standards. The "SZ" prefix explicitly denotes compliance with automotive site and control change requirements, distinguishing it from commercial-grade BZX84C7V5ET1G.
What is the maximum reverse leakage current for SZBZX84C7V5ET1G at 5.0 V?
The maximum reverse leakage current for SZBZX84C7V5ET1G at VR = 5.0 V is 1.0 µA, measured at TA = 25°C. This value remains stable across production lots and is verified during final test screening, ensuring minimal standby power loss in always-on circuits such as real-time clock backup supplies.
Does SZBZX84C7V5ET1G have a connected pin 2 in the SOT-23 package?
No, pin 2 of SZBZX84C7V5ET1G is internally unconnected (NC), as confirmed in the official onsemi datasheet pinout diagram. This eliminates potential ground loops or parasitic coupling paths, allowing designers to omit routing or thermal relief for pin 2 - simplifying layout and improving noise immunity in sensitive analog sections.
What is the Zener impedance of SZBZX84C7V5ET1G and how does it affect regulation stability?
The Zener impedance of SZBZX84C7V5ET1G is 15 Ω at IZT = 5 mA. This low dynamic resistance ensures that a ±1 mA change in Zener current produces only ±15 mV output variation, enabling tight regulation in feedback networks and reference buffers where load-induced voltage droop must be minimized.
SZBZX84C7V5ET1G 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):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 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)
SZBZX84C7V5ET1G FAQ
1.How can I place an order for SZBZX84C7V5ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C7V5ET1G 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 SZBZX84C7V5ET1G reliable?
The price and inventory of SZBZX84C7V5ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C7V5ET1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C7V5ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C7V5ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C7V5ET1G?
SZBZX84C7V5ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C7V5ET1G 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 SZBZX84C7V5ET1G?
For technical support, including SZBZX84C7V5ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C7V5ET1G requirements.
6.How does Aetrix verify that SZBZX84C7V5ET1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C7V5ET1G 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 SZBZX84C7V5ET1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C7V5ET1G?
All SZBZX84C7V5ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C7V5ET1G, 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 SZBZX84C7V5ET1G part is unused and in its original packaging.
Return procedure for SZBZX84C7V5ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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