My Inquiry
My Account
onsemi SZBZX84C9V1LT3
- Part No.:
- SZBZX84C9V1LT3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C9V1LT3.pdf
- Description:
- DIODE ZENER 9.1V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C9V1LT3 from onsemi is a 9.1 V ±5.5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board at 25°C, with 15 Ω dynamic impedance at 5 mA test current and 0.5 μA reverse leakage at 7.2 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the SZBZX84C9V1LT3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5.5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), junction temperature range (−65 to +150°C), and Pb-free SOT-23 packaging compatibility with automated assembly.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at its specified Zener level. Its electrical behavior is defined by three test conditions: 5 mA (primary specification point), 1 mA (low-current regulation), and 20 mA (high-current stability), each with distinct Zener impedance values (15 Ω, 100 Ω, and 8 Ω respectively).
The SZBZX84C9V1LT3 exhibits a positive temperature coefficient of +3.8 mV/°C at 5 mA, indicating voltage increases with temperature - critical for thermal drift compensation in precision bias networks. It features no internal connection on pin 2, confirming true two-terminal functionality with anode (pin 1) and cathode (pin 3) only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal, 8.5–9.6 V min–max at 5 mA - defines stable regulation point under standard bias |
| Power Dissipation | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating |
| Zener Impedance (ZZT) | 15 Ω at 5 mA - determines output voltage variation under load current changes |
| Reverse Leakage Current | 0.5 μA at 7.2 V - indicates low standby power loss in high-impedance bias networks |
| Temperature Coefficient | +3.8 mV/°C at 5 mA - quantifies voltage drift per degree Celsius rise in ambient or junction temperature |
| Capacitance | 130 pF at 0 V, 1 MHz - affects high-frequency noise filtering and signal integrity in RF-coupled circuits |
| ESD Rating | Class 3 (>16 kV HBM) - ensures robustness during PCB handling and automated assembly |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting material, corrosion-resistant finish, UL 94 V-0 flammability rating, 260°C max soldering temperature for 10 seconds. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry / reverse breakdown reference node - connects to lower-potential side of regulated circuit |
| 2 | No Connection | Internally unconnected terminal - must remain floating; no PCB trace or pad required |
| 3 | Cathode | Forward current exit / Zener voltage reference output - connects to regulated rail or bias point |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 Power Rating | Enables compact voltage clamping without heatsinking in handheld PCBs up to 25°C ambient |
| ESD Robustness >16 kV HBM | Eliminates need for external ESD protection in consumer portables during board assembly and field use |
| AEC-Q101 Qualified | Validates reliability for automotive infotainment and body electronics applications requiring extended temperature operation |
| Pb-Free SOT-23 Packaging | Meets RoHS compliance requirements and supports lead-free reflow profiles without solder joint degradation |
| Tight Thermal Resistance Control | 556 °C/W RJA enables accurate thermal modeling for lifetime prediction in sealed enclosures |
Applications
| Cellular Phone Power Management | USB-C Port Voltage Clamp |
|---|---|
Use Scenario: Regulating reference voltage for battery fuel gauge ICs and charging controller feedback loops in smartphones. IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing stable 9.1 V reference for ADC input scaling and comparator thresholds. Use Value: Maintains ±5.5% voltage accuracy across −40 to +85°C operating range, ensuring consistent battery state-of-charge reporting. | Use Scenario: Clamping transient overvoltage on USB-C CC lines during hot-plug events and ESD discharge. IC Role / Device Role / Timing Role: Fast-response Zener clamp absorbing >16 kV HBM surges while limiting line voltage to 9.6 V peak. Use Value: Prevents damage to USB PD controller ICs without adding series resistance that degrades communication signal integrity. |
| Industrial Sensor Signal Conditioning | Automotive Cabin Lighting Bias Network |
Use Scenario: Providing stable bias voltage for op-amp input stages in 4–20 mA loop-powered temperature transmitters. IC Role / Device Role / Timing Role: Shunt regulator establishing precise 9.1 V rail for instrumentation amplifier excitation and reference buffering. Use Value: Delivers <0.5 μA leakage at 7.2 V, minimizing error contribution in microamp-level loop current measurement. | Use Scenario: Setting reference voltage for LED driver current sense amplifiers in vehicle interior lighting modules. IC Role / Device Role / Timing Role: Temperature-compensated Zener (TC = +3.8 mV/°C) counteracting LED forward voltage drift across −40 to +125°C. Use Value: Reduces luminance variation by 30% compared to uncompensated references over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C9V1LT3 | Standard tolerance (±5.5%), 225 mW, SOT-23, non-automotive grade marking | General-purpose regulation; not AEC-Q101 qualified | Select when cost-sensitive industrial or consumer designs do not require automotive qualification |
| SZBZX84B9V1LT3G | Tight tolerance (±2.2%), Pb-free, AEC-Q101 qualified, same 9.1 V nominal | Automotive-grade replacement with tighter voltage control and extended reliability validation | Choose for ADAS camera modules or infotainment systems requiring PPAP documentation and tighter initial calibration |
Compared with SZBZX84C9V1LT3, BZX84C9V1LT3 offers identical electrical specs but lacks automotive qualification and Pb-free assurance, while SZBZX84B9V1LT3G provides tighter tolerance and AEC-Q101 compliance at higher cost - enabling trade-offs between precision, reliability, and regulatory compliance.
Availability
SZBZX84C9V1LT3 is available at Aetrix Electronics and suitable for cellular phone power management, USB-C port voltage clamp, and industrial sensor signal conditioning requiring stable component supply across production volumes.
Supply support for SZBZX84C9V1LT3 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84/SZBZX84 series was designed specifically for space-constrained voltage regulation in portable electronics and automotive subsystems, emphasizing low-profile SOT-23 packaging, high ESD immunity, and wide temperature operation.
FAQ
What is the Zener voltage tolerance of SZBZX84C9V1LT3 at 5 mA test current?
The SZBZX84C9V1LT3 has a Zener voltage tolerance of ±5.5% at 5 mA, with a minimum value of 8.5 V and maximum of 9.6 V. This tolerance reflects the standard C-series specification and is confirmed in the Electrical Characteristics table on page 3 of the official datasheet. The SZBZX84C9V1LT3 maintains this tolerance across its full operating temperature range of −65°C to +150°C.
Does SZBZX84C9V1LT3 have a connection on pin 2?
No, SZBZX84C9V1LT3 has no internal connection on pin 2 - it is electrically isolated and must remain unconnected on the PCB. The device functions as a true two-terminal Zener diode with pin 1 as anode and pin 3 as cathode, as explicitly stated in the Pinout section of the datasheet's Electrical Characteristics table.
What is the thermal resistance (RJA) of SZBZX84C9V1LT3 on FR-5 board?
The thermal resistance from junction to ambient (RJA) for SZBZX84C9V1LT3 is 556 °C/W when mounted on FR-5 board at 25°C, as specified in the Maximum Ratings table. This value applies to standard JEDEC-defined board conditions and decreases linearly by 1.8 mW/°C above 25°C ambient temperature.
Is SZBZX84C9V1LT3 qualified for automotive applications?
Yes, SZBZX84C9V1LT3 is AEC-Q101 qualified and PPAP capable, as confirmed in the Features section of the datasheet. This qualification validates its reliability for automotive body electronics, infotainment systems, and cabin control modules operating across −40°C to +125°C junction temperature range.
What is the reverse leakage current specification for SZBZX84C9V1LT3?
The reverse leakage current for SZBZX84C9V1LT3 is 0.5 μA maximum at 7.2 V reverse voltage and 25°C ambient temperature, per the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in high-impedance bias networks and precision reference applications.
SZBZX84C9V1LT3 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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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)
SZBZX84C9V1LT3 FAQ
1.How can I place an order for SZBZX84C9V1LT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C9V1LT3 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 SZBZX84C9V1LT3 reliable?
The price and inventory of SZBZX84C9V1LT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C9V1LT3 is usually 5 days.
3.What payment methods are accepted for SZBZX84C9V1LT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C9V1LT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C9V1LT3?
SZBZX84C9V1LT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C9V1LT3 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 SZBZX84C9V1LT3?
For technical support, including SZBZX84C9V1LT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C9V1LT3 requirements.
6.How does Aetrix verify that SZBZX84C9V1LT3 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C9V1LT3 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 SZBZX84C9V1LT3 meets industry standards.
7.What is the process for return or replacement of SZBZX84C9V1LT3?
All SZBZX84C9V1LT3 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C9V1LT3, 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 SZBZX84C9V1LT3 part is unused and in its original packaging.
Return procedure for SZBZX84C9V1LT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C9V1LT3 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…
