My Inquiry
My Account
onsemi SZBZX84C3V0LT1
- Part No.:
- SZBZX84C3V0LT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C3V0LT1.pdf
- Description:
- DIODE ZENER 3V 225MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:39,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C3V0LT1 from onsemi is a 3.0 V nominal Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 95 Ω maximum Zener impedance at 5 mA test current and 10 µA reverse leakage at 1.0 V. It provides precision voltage regulation in space-constrained portable electronics such as smartphone power rail clamping and USB interface overvoltage protection.
For engineers reviewing the SZBZX84C3V0LT1 datasheet, pinout, applications, or equivalent options, key selection criteria include its ±0.2 V Zener voltage tolerance at 5 mA, −3.5 mV/°C temperature coefficient, 450 pF capacitance at 0 V bias, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for reverse-biased regulation. Its electrical behavior is defined by Zener breakdown at 3.0 V nominal, with dynamic impedance of 95 Ω at 5 mA and 600 Ω at 1 mA, enabling stable clamping across varying load currents.
The SOT-23 package supports automated surface-mount assembly and delivers thermal resistance of 556 °C/W junction-to-ambient on FR-5 board. It features Class 3 ESD rating (>16 kV HBM), Pb-free construction, and operation across −65°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.8 V to 3.2 V @ 5 mA - defines clamping threshold for 3.3 V rail protection |
| Power Dissipation | 225 mW on FR-5 board - limits continuous surge energy handling in handheld PCBs |
| Zener Impedance | 95 Ω max @ 5 mA - determines regulation stiffness under dynamic load transients |
| Reverse Leakage | 10 µA @ 1.0 V - ensures minimal standby current in always-on voltage monitor circuits |
| Temperature Coefficient | −3.5 mV/°C @ 5 mA - quantifies drift magnitude across automotive ambient temperature ranges |
| Capacitance | 450 pF @ 0 V, 1 MHz - impacts high-frequency noise filtering capability in RF front-end bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - meets IEC 61000-4-2 Level 4 for direct user-interface ESD immunity |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting mold compound, 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 | Connected to lower-potential node during Zener operation; forward conduction path when biased positively |
| 2 | No Connection | Internally unconnected; electrically isolated; must not be soldered or routed |
| 3 | Cathode | Connected to higher-potential node; Zener breakdown occurs between Pin 3 and Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW FR-5 Power Rating | Enables compact overvoltage protection without heatsinking in 0.75″ × 1.0″ PCB areas |
| AEC-Q101 Qualification | Validates reliability for automotive infotainment and body control module voltage references |
| Class 3 ESD Robustness | Supports direct integration into user-accessible ports (e.g., micro-USB, SIM card slots) |
| Pb-Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 |
| Tight Thermal Resistance | 556 °C/W allows sustained 150°C junction operation under 100% derated power at 70°C ambient |
Applications
| Smartphone Power Rail Clamping | USB 2.0 Data Line Protection |
|---|---|
|
Use Scenario: Clamping 3.3 V I/O supply against ESD events and transient surges in LTE modem subsystems. IC Role / Device Role / Timing Role: Two-terminal shunt regulator placed between VCC_IO and GND, conducting only during overvoltage conditions. Use Value: Limits voltage excursion to ≤3.2 V using 2.8–3.2 V Zener band, preventing damage to 3.3 V tolerant transceivers. |
Use Scenario: Protecting D+ and D− lines from contact discharge in mobile device docking stations. IC Role / Device Role / Timing Role: Bidirectional transient suppressor configured with anode tied to signal line and cathode to VBUS or GND. Use Value: 450 pF capacitance avoids signal integrity degradation at 480 Mbps USB 2.0 data rates while passing >16 kV HBM ESD. |
| Automotive Cabin Controller Reference | Industrial Sensor Signal Conditioning |
|
Use Scenario: Providing stable 3.0 V reference for ADC biasing in HVAC control modules operating from 12 V battery rail. IC Role / Device Role / Timing Role: Precision Zener reference source with −3.5 mV/°C TC, buffered via op-amp follower. Use Value: Maintains <±15 mV drift over −40°C to +85°C ambient, meeting ASIL-B functional safety monitoring accuracy. |
Use Scenario: Regulating excitation voltage for 3.3 V bridge sensors in programmable logic controller analog input modules. IC Role / Device Role / Timing Role: Low-noise voltage clamp stabilizing Wheatstone bridge bias under 24 V industrial supply ripple. Use Value: 95 Ω Zener impedance minimizes output impedance variation across 1–20 mA load range, improving sensor linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C3V0LT1 | Same Zener voltage range (2.8–3.2 V) and SOT-23 package, but lacks AEC-Q101 qualification and Pb-free designation. | Restricted to commercial-grade consumer electronics; not approved for automotive production. | Select when cost sensitivity outweighs automotive compliance requirements and lead-free mandate. |
| SZBZX84C3V0LT1G | Identical electrical specs and AEC-Q101 qualification; differs only in Pb-free marking suffix "G" per ON Semiconductor packaging standard. | No functional difference; both meet same reliability and environmental standards. | Prefer SZBZX84C3V0LT1G for new designs requiring documented RoHS compliance traceability. |
Compared with BZX84C3V0LT1, SZBZX84C3V0LT1 offers certified automotive qualification and Pb-free assurance, while SZBZX84C3V0LT1G provides identical performance with explicit RoHS documentation-making the original SZBZX84C3V0LT1 optimal for legacy automotive builds where "G"-suffix inventory is unavailable.
Availability
SZBZX84C3V0LT1 is available at Aetrix Electronics and suitable for smartphone power management, USB interface protection, and automotive cabin controller reference designs requiring stable component supply across extended product lifecycles.
Supply support for SZBZX84C3V0LT1 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 silicon solutions for automotive, industrial, cloud computing, and IoT applications.
SZBZX84C3V0LT1 belongs to the BZX84CxxxLT1 family of 225 mW Zener regulators, engineered for high-density portable electronics and automotive systems demanding AEC-Q101 reliability and space-constrained SOT-23 packaging.
FAQ
What is the Zener voltage tolerance of SZBZX84C3V0LT1 at 5 mA test current?
The SZBZX84C3V0LT1 has a specified Zener voltage range of 2.8 V to 3.2 V at 5 mA test current, yielding a ±0.2 V absolute tolerance. This corresponds to ±6.7% of the nominal 3.0 V rating and is confirmed in the Electrical Characteristics table on page 3 of the official datasheet. The tolerance directly defines the worst-case clamping window in overvoltage protection circuits using the SZBZX84C3V0LT1.
Does SZBZX84C3V0LT1 have a connected pin 2, and what is its function?
No, pin 2 of the SZBZX84C3V0LT1 is internally unconnected (NC) and must remain electrically floating in the PCB layout. As documented in the marking diagram and Electrical Characteristics section, the device uses only pins 1 (anode) and 3 (cathode) for operation. Routing or soldering pin 2 introduces risk of mechanical stress or unintended coupling and violates the validated SOT-23 footprint for the SZBZX84C3V0LT1.
What is the maximum reverse leakage current for SZBZX84C3V0LT1, and at what voltage is it measured?
The maximum reverse leakage current for SZBZX84C3V0LT1 is 10 µA, measured at a reverse voltage (VR) of 1.0 V and ambient temperature of 25°C. This value is explicitly listed in the "Max Reverse Leakage Current" column of the BZX84CxxxLT1 series table on page 3. It reflects the diode's off-state conduction limit and directly impacts quiescent power loss in always-on reference circuits using the SZBZX84C3V0LT1.
Is SZBZX84C3V0LT1 qualified for automotive applications, and what standard does it meet?
Yes, SZBZX84C3V0LT1 is AEC-Q101 qualified, as stated in the Features section on page 1 of the datasheet. This qualification validates its reliability for automotive electronic components under stress conditions including temperature cycling, humidity, and mechanical shock. The "SZ" prefix specifically denotes parts manufactured to meet automotive and other applications requiring unique site and process controls-confirming the SZBZX84C3V0LT1's suitability for engine control units, ADAS sensors, and infotainment systems.
What is the thermal resistance junction-to-ambient for SZBZX84C3V0LT1 on FR-5 board?
The thermal resistance junction-to-ambient (RJA) for SZBZX84C3V0LT1 is 556 °C/W when mounted on FR-5 board, as specified in the Maximum Ratings table on page 2. This value assumes standard 1.0″ × 0.75″ copper pad layout and defines the temperature rise per milliwatt of power dissipated. At full 225 mW rating, this results in a 125°C junction-to-ambient delta, requiring derating above 25°C ambient per the 1.8 mW/°C slope shown in the datasheet.
SZBZX84C3V0LT1 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):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
SZBZX84C3V0LT1 FAQ
1.How can I place an order for SZBZX84C3V0LT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C3V0LT1 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 SZBZX84C3V0LT1 reliable?
The price and inventory of SZBZX84C3V0LT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V0LT1 is usually 5 days.
3.What payment methods are accepted for SZBZX84C3V0LT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V0LT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C3V0LT1?
SZBZX84C3V0LT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C3V0LT1 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 SZBZX84C3V0LT1?
For technical support, including SZBZX84C3V0LT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V0LT1 requirements.
6.How does Aetrix verify that SZBZX84C3V0LT1 is sourced from the original manufacturer or authorized distributors?
All SZBZX84C3V0LT1 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 SZBZX84C3V0LT1 meets industry standards.
7.What is the process for return or replacement of SZBZX84C3V0LT1?
All SZBZX84C3V0LT1 units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V0LT1, 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 SZBZX84C3V0LT1 part is unused and in its original packaging.
Return procedure for SZBZX84C3V0LT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C3V0LT1 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…
