My Inquiry
My Account
onsemi SZBZX84C75LT3
- Part No.:
- SZBZX84C75LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C75LT3.pdf
- Description:
- DIODE ZENER 75V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C75LT3 from onsemi is a 75 V, ±5% tolerance Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 500 Ω maximum Zener impedance at 20 mA test current and 0.05 μA reverse leakage at 52.5 V, used for precision voltage regulation in portable power rails and reference circuits.
For engineers reviewing the SZBZX84C75LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (75 V), temperature coefficient (+52.5 mV/°C), dynamic impedance (500 Ω @ 20 mA), reverse leakage (0.05 μA @ 52.5 V), and SOT-23 package compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable DC voltage clamping and regulation under reverse-biased conditions. Its Zener breakdown mechanism delivers predictable voltage control across ambient temperatures from −65°C to +150°C.
The SZBZX84C75LT3 exhibits a positive temperature coefficient of +52.5 mV/°C at 5 mA, indicating increasing Zener voltage with rising junction temperature. It maintains ≤140 pF capacitance at 0 V bias and 1 MHz, supporting low-noise signal conditioning in analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 70 V min / 75 V nom / 79 V max @ 5 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation | 225 mW on FR-5 board @ 25°C - sets maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 500 Ω max @ 20 mA - determines AC voltage variation under load transients |
| Reverse Leakage Current | 0.05 μA max @ 52.5 V - ensures minimal standby current in high-impedance bias networks |
| Temperature Coefficient | +52.5 mV/°C @ 5 mA - quantifies voltage drift per degree Celsius rise in junction temperature |
| Capacitance | 35 pF max @ 0 V, 1 MHz - limits high-frequency coupling in filtering and timing applications |
| ESD Rating | Class 3 (>16 kV) HBM - enables robust handling in automated assembly without protection circuitry |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting construction, corrosion-resistant finish, UL 94 V-0 flammability rating, 260°C max soldering temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | No Connection | Internally unconnected; must remain floating-no PCB trace or pad required |
| 3 | Cathode | Reverse-biased terminal; connects to higher-potential node and serves as regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 power rating | Enables compact voltage clamping in space-constrained mobile and IoT PCBs without heatsinking |
| ±5% Zener tolerance | Supports cost-sensitive designs where tight regulation is not required but repeatability matters |
| ESD Class 3 (>16 kV HBM) | Eliminates need for external ESD protection during board assembly and field operation |
| AEC-Q101 qualified | Validates reliability for automotive body electronics, infotainment power supplies, and ADAS subsystems |
| Pb-free (RoHS-compliant) option | Meets global environmental compliance requirements without sacrificing electrical performance |
Applications
| Portable Power Management | Automotive Sensor Reference |
|---|---|
Use Scenario: Regulating bias voltage for ADC reference inputs in battery-powered handheld meters. IC Role / Device Role / Timing Role: Zener diode providing stable 75 V reference for high-voltage sensing front-end. Use Value: Maintains <±0.5% reference stability over −20°C to +70°C operating range with <0.05 μA leakage. |
Use Scenario: Clamping transient overvoltage on 12 V CAN bus power rail in vehicle telematics modules. IC Role / Device Role / Timing Role: Protective Zener shunt limiting supply spikes to prevent downstream IC damage. Use Value: Absorbs 225 mW surges up to 100 ms duration while holding clamp voltage ≤79 V. |
| Industrial PLC I/O Protection | Medical Instrumentation Biasing |
Use Scenario: Overvoltage protection for analog input channels in programmable logic controller analog modules. IC Role / Device Role / Timing Role: Precision Zener clamp referenced to isolated ground plane. Use Value: Limits fault voltage to 79 V max while contributing <35 pF parasitic capacitance to signal path. |
Use Scenario: Generating stable high-voltage bias for photomultiplier tube (PMT) anode chains in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Series-connected Zener string element delivering calibrated 75 V node. Use Value: Delivers <±5% voltage accuracy with +52.5 mV/°C TC compensated via matched diode pairing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C75LT3 | Same 75 V nominal Zener, identical SOT-23 package, but non-automotive grade and no AEC-Q101 qualification | Lacks automotive reliability validation; suitable only for commercial-grade consumer or industrial use | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| SZBZX84C75LT3G | Pb-free variant with identical electrical specs and AEC-Q101 qualification; same 10,000/reel tape-and-reel packaging | Identical functional behavior; differs only in RoHS compliance and lead finish | Choose for new designs requiring lead-free compliance without compromising performance or qualification |
Compared with SZBZX84C75LT3, BZX84C75LT3 offers identical regulation performance at lower qualification assurance, while SZBZX84C75LT3G provides full RoHS compliance with no trade-offs in voltage accuracy, thermal stability, or surge capability.
Availability
SZBZX84C75LT3 is available at Aetrix Electronics and suitable for portable power management, automotive sensor reference, industrial PLC I/O protection, and medical instrumentation biasing requiring stable component supply across production lifecycles.
Supply support for SZBZX84C75LT3 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SZBZX84CxxxLT3 series belongs to onsemi's automotive-qualified Zener regulator product line, engineered for reliable voltage reference and transient suppression in harsh-environment electronics where AEC-Q101 validation and long-term parametric stability are mandatory.
FAQ
What is the Zener voltage tolerance of SZBZX84C75LT3?
The SZBZX84C75LT3 has a nominal Zener voltage of 75 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 70 V and 79 V when tested at 5 mA. This tolerance is specified per the BZX84CxxxLT1 series standard and applies across the full operating temperature range of −65°C to +150°C. The SZBZX84C75LT3 datasheet confirms this range in the Electrical Characteristics table on page 3.
Does SZBZX84C75LT3 have a built-in ESD protection rating?
Yes, SZBZX84C75LT3 is rated for Class 3 human-body-model (HBM) ESD protection with >16 kV withstand capability. This specification is explicitly stated in the Features section of the official datasheet and validated per ANSI/ESDA/JEDEC JS-001. The robust ESD rating allows direct handling and placement in automated SMT lines without additional protection circuitry.
What is the thermal resistance of SZBZX84C75LT3 on FR-5 board?
The thermal resistance from junction to ambient (RJA) for SZBZX84C75LT3 is 556°C/W when mounted on an FR-5 board at 25°C ambient. This value is derived from the Maximum Ratings table and reflects the device's ability to dissipate 225 mW before exceeding its maximum junction temperature. Derating begins at 1.8 mW/°C above 25°C ambient.
Is SZBZX84C75LT3 qualified for automotive applications?
Yes, SZBZX84C75LT3 is AEC-Q101 qualified and PPAP capable, as confirmed in the Features section of the datasheet. The "SZ" prefix specifically denotes parts meeting automotive-grade reliability requirements, including extended temperature operation (−65°C to +150°C), accelerated life testing, and failure analysis protocols mandated for automotive electronics.
What is the reverse leakage current specification for SZBZX84C75LT3?
SZBZX84C75LT3 specifies a maximum reverse leakage current (IR) of 0.05 μA at a reverse voltage (VR) of 52.5 V, measured at 25°C ambient. This parameter is critical for low-power bias networks and high-impedance reference circuits where leakage-induced error must be minimized. The value is published in the Electrical Characteristics table on page 3 of the datasheet.
SZBZX84C75LT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±6%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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)
SZBZX84C75LT3 FAQ
1.How can I place an order for SZBZX84C75LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C75LT3 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 SZBZX84C75LT3 reliable?
The price and inventory of SZBZX84C75LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C75LT3 is usually 5 days.
3.What payment methods are accepted for SZBZX84C75LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C75LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C75LT3?
SZBZX84C75LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C75LT3 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 SZBZX84C75LT3?
For technical support, including SZBZX84C75LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C75LT3 requirements.
6.How does Aetrix verify that SZBZX84C75LT3 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C75LT3 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 SZBZX84C75LT3 meets industry standards.
7.What is the process for return or replacement of SZBZX84C75LT3?
All SZBZX84C75LT3 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C75LT3, 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 SZBZX84C75LT3 part is unused and in its original packaging.
Return procedure for SZBZX84C75LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C75LT3 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
