My Inquiry
My Account
onsemi SZBZX84C20LT1G
- Part No.:
- SZBZX84C20LT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZBZX84C20LT1G.pdf
- Description:
- DIODE ZENER 20V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,446
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SZBZX84C20LT1G from onsemi is a 20 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 55 Ω dynamic impedance at 5 mA test current and 14 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZBZX84C20LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal coefficient stability, low leakage (<50 nA @ 16 V), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at 20 V nominal with tight regulation across 1–20 mA operating range. Its SOT-23 package supports automated placement and provides ESD robustness (>16 kV HBM).
The SZ prefix denotes automotive-grade qualification per AEC-Q101, with PPAP capability and controlled manufacturing site requirements. It exhibits a positive temperature coefficient of +14 mV/°C above 10 V, enabling predictable drift behavior in temperature-varying environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.2 V @ IZT = 5 mA - ensures stable 20 V reference within ±5% tolerance under standard bias |
| Dynamic Impedance (ZZT) | 55 Ω @ IZT = 5 mA - limits output voltage variation during load transients |
| Power Dissipation | 250 mW on FR-5 board - defines maximum continuous power handling without derating below 25°C |
| Reverse Leakage Current | <50 nA @ VR = 16 V - guarantees minimal quiescent current in standby or high-impedance sensing nodes |
| Temperature Coefficient | +14 mV/°C @ IZT = 5 mA - enables predictable voltage drift compensation in thermal design |
| Capacitance | 85 pF @ VR = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response in clamping circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - ensures robustness against handling and system-level electrostatic discharge events |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band; Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward-biased terminal; connects to lower-potential node in reverse-bias regulation configuration |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Reverse-biased terminal; connects to regulated voltage rail or clamping node |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS power supplies |
| 250 mW FR-5 rating | Enables compact voltage regulation without heatsinking in space-constrained PCBs |
| ±5% Zener tolerance | Reduces need for post-production calibration in mid-precision reference designs |
| 16 kV HBM ESD rating | Eliminates need for external ESD protection in handheld and portable interfaces |
| Pb-free / RoHS compliant | Meets global environmental compliance mandates without performance trade-offs |
Applications
| Automotive Body Control Module (BCM) | USB-C Power Delivery Clamp |
|---|---|
Use Scenario: Regulating 20 V auxiliary supply rail feeding microcontroller I/O buffers and CAN transceivers. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting downstream logic from battery transients. Use Value: Maintains rail integrity during load-dump events up to 35 V while consuming <50 nA in sleep mode. |
Use Scenario: Clamping CC line voltage during USB-C negotiation to prevent controller damage from VBUS coupling. IC Role / Device Role / Timing Role: Fast-acting shunt regulator limiting CC pin voltage to 20 V during fault conditions. Use Value: Responds within nanoseconds to transient spikes, with 85 pF capacitance minimizing signal distortion on 300 kHz CC communication. |
| Industrial Sensor Signal Conditioning | Medical Wearable Battery Monitor |
Use Scenario: Providing stable 20 V reference for 16-bit ADC excitation in strain-gauge bridge circuits. IC Role / Device Role / Timing Role: Precision voltage reference with +14 mV/°C TC enabling software-based thermal compensation. Use Value: Enables <±0.1% full-scale accuracy over −40°C to +125°C without trimming components. |
Use Scenario: Monitoring lithium-ion cell stack voltage in multi-cell wearable battery packs. IC Role / Device Role / Timing Role: Overvoltage protector for fuel gauge IC inputs during charging surge events. Use Value: Withstands repeated 24 V transients while maintaining <50 nA leakage to preserve weeks-long battery runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C20LT1G | Standard industrial grade; no AEC-Q101 qualification; same electrical specs and SOT-23 package | Lacks automotive PPAP documentation and extended temperature validation | Select when cost sensitivity outweighs automotive compliance requirements |
| SZBZX84C20LT3G | Same AEC-Q101 qualification; 10,000-unit tape-and-reel packaging vs. 3,000 units | Optimized for high-volume production runs with automated pick-and-place feeders | Select for large-batch manufacturing where reel size impacts line efficiency |
Compared with BZX84C20LT1G and SZBZX84C20LT3G, the SZBZX84C20LT1G uniquely balances automotive qualification, small-batch reel compatibility, and guaranteed 20 V ±5% regulation - making it optimal for prototyping and low-to-mid volume automotive subsystems.
Availability
SZBZX84C20LT1G is available at Aetrix Electronics and suitable for automotive electronics, portable medical devices, and industrial sensor interface circuits requiring stable component supply with AEC-Q101 assurance.
Supply support for SZBZX84C20LT1G 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, and IoT applications - focused on enabling sustainable technology infrastructure.
The SZBZX84CxxxLT1G series is part of onsemi's automotive-qualified Zener portfolio, designed specifically for voltage regulation and transient suppression in harsh-environment electronic control units.
FAQ
What is the exact Zener voltage tolerance for SZBZX84C20LT1G?
The SZBZX84C20LT1G has a nominal Zener voltage of 20 V with a tolerance of ±5%, specified as 18.8 V minimum to 21.2 V maximum at 5 mA test current. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet (Rev. 23, August 2021), under the BZX84CxxxLT1 series listing.
Is SZBZX84C20LT1G pin-compatible with BZX84C20LT1G?
Yes, SZBZX84C20LT1G is pin-compatible with BZX84C20LT1G - both use identical SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode. The SZ prefix indicates automotive qualification but does not alter pinout, footprint, or soldering profile.
What is the maximum reverse leakage current for SZBZX84C20LT1G at 16 V?
The maximum reverse leakage current for SZBZX84C20LT1G is 50 nA at VR = 16 V, as specified in the Electrical Characteristics table on page 3 of the onsemi datasheet. This value is measured at TA = 25°C and ensures minimal standby power loss in battery-sensitive applications.
Does SZBZX84C20LT1G support reflow soldering, and what is the peak temperature limit?
Yes, SZBZX84C20LT1G supports standard lead-free reflow soldering with a maximum case temperature of 260°C for 10 seconds, per the Mechanical Characteristics section of the datasheet. Its thermosetting plastic SOT-23 package is rated for UL 94 V-0 flammability and withstands typical Pb-free reflow profiles.
How does the temperature coefficient of SZBZX84C20LT1G affect its regulation accuracy over temperature?
The SZBZX84C20LT1G has a temperature coefficient of +14 mV/°C at IZT = 5 mA, meaning its Zener voltage increases by approximately 14 mV per degree Celsius rise. Over a −40°C to +125°C range, this results in ~2.3 V total drift - a known, linear behavior that can be compensated in firmware or analog circuitry.
SZBZX84C20LT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZBZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±6%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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)
SZBZX84C20LT1G FAQ
1.How can I place an order for SZBZX84C20LT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZBZX84C20LT1G 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 SZBZX84C20LT1G reliable?
The price and inventory of SZBZX84C20LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C20LT1G is usually 5 days.
3.What payment methods are accepted for SZBZX84C20LT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C20LT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZBZX84C20LT1G?
SZBZX84C20LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZBZX84C20LT1G 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 SZBZX84C20LT1G?
For technical support, including SZBZX84C20LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C20LT1G requirements.
6.How does Aetrix verify that SZBZX84C20LT1G is sourced from the original manufacturer or authorized distributors?
All SZBZX84C20LT1G 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 SZBZX84C20LT1G meets industry standards.
7.What is the process for return or replacement of SZBZX84C20LT1G?
All SZBZX84C20LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C20LT1G, 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 SZBZX84C20LT1G part is unused and in its original packaging.
Return procedure for SZBZX84C20LT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SZBZX84C20LT1G 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…
