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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi SZBZX84B7V5LT1G

Name: SZBZX84B7V5LT1G
Brand: onsemi
SKU: SZBZX84B7V5LT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84B7V5LT1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: SZBZX84B7V5LT1G.pdf

Description:: DIODE ZENER 7.5V 250MW SOT23-3

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Product details

Overview

SZBZX84B7V5LT1G from onsemi is a tight-tolerance Zener diode in SOT-23 package, providing precise 7.5 V voltage regulation at 5 mA test current with ±0.15 V (±2%) tolerance, 15 Ω dynamic impedance, and 1 μA reverse leakage at 5.3 V. It delivers stable reference voltage for power supply feedback, overvoltage protection, and voltage clamping in space-constrained portable electronics.

For engineers reviewing the SZBZX84B7V5LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal coefficient (+2.5 mV/°C), low capacitance (140 pF), AEC-Q101 qualification, and Pb-free SOT-23 packaging for high-density PCB assembly.

Technical Context

This device operates as a two-terminal voltage reference using controlled avalanche breakdown in silicon. Its tight 2% tolerance (7.35–7.65 V) and low temperature coefficient (+2.5 mV/°C) enable stable regulation across −65°C to +150°C junction temperature range. The SOT-23 package supports automated placement and provides 250 mW power dissipation on FR-5 board.

Pin configuration is fixed: Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. Reverse leakage remains ≤1 μA at VR = 5.3 V, and forward voltage is ≤0.90 V at IF = 10 mA - critical for bidirectional clamping and low-loss biasing applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.5 V nominal @ I_ZT = 5 mA; ±0.15 V tolerance ensures accurate feedback in SMPS error amplifiers.
Zener Impedance (Z_ZT)	15 Ω @ I_ZT = 5 mA; low dynamic resistance maintains regulation stability under load transients.
Reverse Leakage (I_R)	≤1 μA @ V_R = 5.3 V; minimizes quiescent current in battery-powered voltage monitors.
Temperature Coefficient	+2.5 mV/°C @ I_ZT = 5 mA; predictable drift enables compensation in precision references.
Capacitance (C)	140 pF @ V_R = 0 V, f = 1 MHz; low parasitic capacitance preserves signal integrity in RF bias networks.
Power Dissipation	250 mW on FR-5 board; sufficient for low-power clamp and reference roles without heatsinking.
ESD Rating	Class 3 (>16 kV HBM); robust handling during automated assembly and field operation.

Pinout & Package

SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, Pb-free, RoHS compliant, cathode indicated by band. Rated for 260°C soldering (10 s).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node; reverse-biased during Zener operation; carries forward current when used bidirectionally.
2	No Connection	Internally unconnected; must remain floating - no PCB trace or pad required.
3	Cathode	Connected to higher-potential node; defines regulated output voltage relative to anode; marked by polarity band.

Key Features

Feature	Design Value
Tight 2% Zener tolerance	Enables direct use in closed-loop feedback without external trimming in 5 V–12 V DC-DC converters.
AEC-Q101 qualified	Validated for automotive power management modules requiring PPAP documentation and zero-defect reliability.
16 kV HBM ESD rating	Eliminates need for external ESD protection in handheld device front-end circuits.
Low 140 pF capacitance	Permits use in high-frequency bias networks (e.g., GaN gate drivers) without signal distortion.
Pb-free & RoHS compliant	Meets global environmental compliance requirements for consumer, industrial, and automotive end equipment.

Applications

USB Power Delivery Clamp	Automotive ECU Reference
Use Scenario: Clamping transient overvoltage on USB Type-C VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy above 7.5 V while limiting downstream IC stress. Use Value: Prevents damage to USB-PD controller ICs by clamping spikes to ≤7.9 V (max V_Z) with <1 μA standby leakage.	Use Scenario: Providing stable 7.5 V reference for microcontroller ADC and sensor bias in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference source with AEC-Q101 qualification for functional safety-critical subsystems. Use Value: Maintains ±0.15 V accuracy over −40°C to +125°C ambient, enabling <0.5% ADC measurement error without calibration.
Portable Medical Sensor Bias	Industrial PLC Input Protection
Use Scenario: Biasing analog front-end of wearable ECG amplifier requiring ultra-low noise and stable DC offset. IC Role / Device Role / Timing Role: Low-capacitance (140 pF), low-leakage (≤1 μA) Zener establishing clean 7.5 V rail for op-amp biasing. Use Value: Minimizes input-referred noise and avoids baseline drift in sub-μV biomedical signal chains.	Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against ESD and surge events. IC Role / Device Role / Timing Role: Primary shunt clamp on input line, working with series resistor to limit current into optocoupler input. Use Value: Withstands >16 kV HBM strikes and regulates clamped voltage to ≤7.9 V, ensuring optocoupler LED longevity.

USB Power Delivery Clamp

Automotive ECU Reference

Use Scenario: Clamping transient overvoltage on USB Type-C VBUS line during hot-plug events.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy above 7.5 V while limiting downstream IC stress.

Use Value: Prevents damage to USB-PD controller ICs by clamping spikes to ≤7.9 V (max V_Z) with <1 μA standby leakage.

Use Scenario: Providing stable 7.5 V reference for microcontroller ADC and sensor bias in engine control units.

IC Role / Device Role / Timing Role: Precision voltage reference source with AEC-Q101 qualification for functional safety-critical subsystems.

Use Value: Maintains ±0.15 V accuracy over −40°C to +125°C ambient, enabling <0.5% ADC measurement error without calibration.

Portable Medical Sensor Bias

Industrial PLC Input Protection

Use Scenario: Biasing analog front-end of wearable ECG amplifier requiring ultra-low noise and stable DC offset.

IC Role / Device Role / Timing Role: Low-capacitance (140 pF), low-leakage (≤1 μA) Zener establishing clean 7.5 V rail for op-amp biasing.

Use Value: Minimizes input-referred noise and avoids baseline drift in sub-μV biomedical signal chains.

Use Scenario: Protecting 24 V digital input channels in programmable logic controllers against ESD and surge events.

IC Role / Device Role / Timing Role: Primary shunt clamp on input line, working with series resistor to limit current into optocoupler input.

Use Value: Withstands >16 kV HBM strikes and regulates clamped voltage to ≤7.9 V, ensuring optocoupler LED longevity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84B7V5LT1G	Same electrical specs but lacks SZ-prefix AEC-Q101 qualification and automotive PPAP support.	Approved for commercial-grade portable electronics only; not suitable for automotive Tier-1 BOMs.	Select when cost sensitivity outweighs automotive compliance requirements.
SZBZX84C7V5LT1G	Looser 5% tolerance (7.13–7.88 V), higher Z_ZT (20 Ω), same package and thermal specs.	Acceptable for non-critical biasing where ±0.38 V variation is tolerable (e.g., LED current setting).	Choose for general-purpose clamping where tighter regulation is unnecessary and unit cost is prioritized.

Compared with BZX84B7V5LT1G and SZBZX84C7V5LT1G, the SZBZX84B7V5LT1G uniquely combines automotive qualification, 2% tolerance, and 15 Ω impedance - making it the only option for safety-critical, high-accuracy 7.5 V reference in harsh environments.

Availability

SZBZX84B7V5LT1G is available at Aetrix Electronics and suitable for USB power delivery systems, automotive electronic control units, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SZBZX84B7V5LT1G 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 IoT applications.

SZBZX84BxxxLT1G belongs to onsemi's AEC-Q101-qualified Zener regulator family, engineered for high-reliability voltage reference and clamping in automotive and industrial environments where precision and ruggedness are mandatory.

FAQ

What is the exact Zener voltage tolerance of SZBZX84B7V5LT1G?

The SZBZX84B7V5LT1G has a guaranteed Zener voltage range of 7.35 V to 7.65 V at 5 mA test current, representing a tight ±2% tolerance. This specification is verified per onsemi's BZX84BxxxLT1G datasheet revision 23, page 4, and enables direct use in precision feedback loops without calibration.

Is SZBZX84B7V5LT1G suitable for automotive applications?

Yes, SZBZX84B7V5LT1G is AEC-Q101 qualified and PPAP capable, with manufacturing and testing performed to automotive quality standards. Its −65°C to +150°C operating range, 16 kV HBM ESD rating, and traceable lot control make it approved for use in engine control modules, ADAS sensors, and infotainment power supplies.

What is the pin configuration and marking for SZBZX84B7V5LT1G?

SZBZX84B7V5LT1G uses SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode (marked by band). Device marking is "T15" per datasheet page 4. Pin 2 must remain unconnected on PCB - no trace or via should be routed to it.

How does the temperature coefficient affect SZBZX84B7V5LT1G performance?

SZBZX84B7V5LT1G exhibits a +2.5 mV/°C temperature coefficient at 5 mA, meaning its Zener voltage increases by 2.5 mV per degree Celsius rise in junction temperature. This predictable positive drift allows designers to compensate reference circuits in wide-temperature applications such as under-hood automotive modules.

Can SZBZX84B7V5LT1G replace BZX84C7V5LT1G in existing designs?

SZBZX84B7V5LT1G can replace BZX84C7V5LT1G only if tighter tolerance (±2% vs. ±5%), lower impedance (15 Ω vs. 20 Ω), and automotive qualification are required. Electrical pinout and package are identical, but the SZBZX84B7V5LT1G's enhanced specs may necessitate layout review for thermal and noise-sensitive circuits.

SZBZX84B7V5LT1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: SZBZX84BxxxLT1G

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:: ±2%

Power - Max:: 250 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)

SZBZX84B7V5LT1G FAQ

1.How can I place an order for SZBZX84B7V5LT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84B7V5LT1G 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 SZBZX84B7V5LT1G reliable?

The price and inventory of SZBZX84B7V5LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84B7V5LT1G is usually 5 days.

3.What payment methods are accepted for SZBZX84B7V5LT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84B7V5LT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84B7V5LT1G?

SZBZX84B7V5LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84B7V5LT1G 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 SZBZX84B7V5LT1G?

For technical support, including SZBZX84B7V5LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84B7V5LT1G requirements.

6.How does Aetrix verify that SZBZX84B7V5LT1G is sourced from the original manufacturer or authorized distributors?

All SZBZX84B7V5LT1G 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 SZBZX84B7V5LT1G meets industry standards.

7.What is the process for return or replacement of SZBZX84B7V5LT1G?

All SZBZX84B7V5LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84B7V5LT1G, 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 SZBZX84B7V5LT1G part is unused and in its original packaging.

Return procedure for SZBZX84B7V5LT1G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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