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

onsemi SZBZX84C27LT1G

Name: SZBZX84C27LT1G
Brand: onsemi
SKU: SZBZX84C27LT1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C27LT1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: SZBZX84C27LT1G.pdf

Description:: DIODE ZENER 27V 250MW SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:12,128

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Product details

Overview

SZBZX84C27LT1G from onsemi is a 27 V ±5.6% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 80 Ω dynamic impedance at 5 mA test current and 0.05 μA reverse leakage at 20.3 V. It provides precision voltage regulation in space-constrained DC power rails for portable electronics.

For engineers reviewing the SZBZX84C27LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5.6%), thermal coefficient (+18.9 mV/°C), low capacitance (70 pF), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in silicon PN junction. Its nominal 27 V Zener voltage is specified at 5 mA test current (IZT), with guaranteed min/max bounds of 25.1 V and 28.9 V. The 80 Ω dynamic impedance (ZZT) reflects voltage stability under small-signal AC perturbation.

Designed for surface-mount assembly on FR-4/FR-5 PCBs, it features Class 3 ESD robustness (>16 kV HBM), Pb-free construction, and UL 94 V-0 flammability rating. The SOT-23 package supports automated placement while maintaining thermal resistance of 500 °C/W junction-to-ambient on standard board material.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	27 V nominal, 25.1–28.9 V range at I_ZT = 5 mA - defines regulated output voltage tolerance
Power Dissipation	250 mW on FR-5 board - sets maximum continuous DC power handling without derating
Zener Impedance	80 Ω at I_ZT = 5 mA - determines AC voltage variation under load transients
Reverse Leakage	0.05 μA at V_R = 20.3 V - ensures minimal quiescent current in standby mode
Capacitance	70 pF at V_R = 0 V, f = 1 MHz - impacts high-frequency noise filtering capability
Temp. Coefficient	+18.9 mV/°C at I_ZT = 5 mA - quantifies voltage drift over operating temperature range
ESD Rating	Class 3 (>16 kV HBM) - enables direct handling in uncontrolled environments without damage

Pinout & Package

SOT-23 (TO-236) plastic surface-mount package, 2.90 × 1.30 × 1.00 mm body size, void-free thermosetting case with corrosion-resistant finish. Cathode indicated by band; pin 2 is internally unconnected.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	DC input terminal; connects to lower-potential side of regulated rail
2	No Connection	Internally isolated; no electrical function or PCB trace required
3	Cathode	Regulated output terminal; connects to reference node or feedback path

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive applications including engine control modules and infotainment power supplies
Pb-Free & RoHS Compliant	Meets global environmental regulations; compatible with lead-free reflow soldering profiles
Tight Thermal Coefficient Control	+18.9 mV/°C enables stable reference performance across −65°C to +150°C junction range
Low Capacitance (70 pF)	Minimizes signal coupling in high-speed digital supply filtering applications
High ESD Robustness	Class 3 (>16 kV HBM) eliminates need for external ESD protection in handheld device designs

Applications

Automotive Body Control Module	Industrial Sensor Signal Conditioning
Use Scenario: Regulating 27 V reference for LIN bus transceiver biasing and microcontroller ADC reference in door module PCBs. IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing stable 27 V rail independent of battery voltage fluctuations. Use Value: Maintains <±1% output accuracy over −40°C to +125°C ambient, enabling reliable CAN/LIN communication without external LDO.	Use Scenario: Providing precise 27 V Zener clamp for 4–20 mA loop-powered pressure sensor front-end amplifiers. IC Role / Device Role / Timing Role: Overvoltage protection element limiting amplifier supply rail during transient surges on industrial field wiring. Use Value: 80 Ω dynamic impedance ensures <50 mV output deviation during 10 mA surge events, preserving sensor linearity.
Portable Medical Pulse Oximeter	5G Small Cell RF Power Amplifier Bias
Use Scenario: Generating stable 27 V bias for red/IR LED drivers in battery-operated wearable oximeters. IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) voltage reference enabling >100-hour battery life in sleep mode. Use Value: 70 pF capacitance prevents RF coupling into analog photodiode signal path, reducing measurement noise floor.	Use Scenario: Setting gate bias point for GaN HEMT driver stages in millimeter-wave small cell base stations. IC Role / Device Role / Timing Role: Precision shunt regulator defining stable 27 V gate control voltage for RF power stage linearization. Use Value: ±5.6% V_Z tolerance ensures repeatable PA gain flatness across production batches without calibration.

Automotive Body Control Module

Industrial Sensor Signal Conditioning

Use Scenario: Regulating 27 V reference for LIN bus transceiver biasing and microcontroller ADC reference in door module PCBs.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator establishing stable 27 V rail independent of battery voltage fluctuations.

Use Value: Maintains <±1% output accuracy over −40°C to +125°C ambient, enabling reliable CAN/LIN communication without external LDO.

Use Scenario: Providing precise 27 V Zener clamp for 4–20 mA loop-powered pressure sensor front-end amplifiers.

IC Role / Device Role / Timing Role: Overvoltage protection element limiting amplifier supply rail during transient surges on industrial field wiring.

Use Value: 80 Ω dynamic impedance ensures <50 mV output deviation during 10 mA surge events, preserving sensor linearity.

Portable Medical Pulse Oximeter

5G Small Cell RF Power Amplifier Bias

Use Scenario: Generating stable 27 V bias for red/IR LED drivers in battery-operated wearable oximeters.

IC Role / Device Role / Timing Role: Low-leakage (0.05 μA) voltage reference enabling >100-hour battery life in sleep mode.

Use Value: 70 pF capacitance prevents RF coupling into analog photodiode signal path, reducing measurement noise floor.

Use Scenario: Setting gate bias point for GaN HEMT driver stages in millimeter-wave small cell base stations.

IC Role / Device Role / Timing Role: Precision shunt regulator defining stable 27 V gate control voltage for RF power stage linearization.

Use Value: ±5.6% V_Z tolerance ensures repeatable PA gain flatness across production batches without calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C27LT1G	Same Zener voltage (27 V), identical SOT-23 package, but lacks AEC-Q101 qualification and automotive PPAP support	Restricted to commercial/industrial use; not approved for automotive safety-critical subsystems	Select when automotive qualification is unnecessary and cost sensitivity outweighs long-term supply assurance
SZBZX84C27LT3G	Identical electrical specs and AEC-Q101 rating, but supplied in 10,000-unit tape-and-reel versus 3,000-unit for SZBZX84C27LT1G	Optimized for high-volume automated assembly; requires larger reel handling infrastructure	Select for mass production lines requiring extended reel runtime and reduced changeover frequency

Compared with BZX84C27LT1G and SZBZX84C27LT3G, the SZBZX84C27LT1G uniquely balances automotive qualification with standard 3k-reel logistics-enabling design-in for Tier 1 suppliers needing PPAP documentation without minimum order quantity constraints.

Availability

SZBZX84C27LT1G is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, portable medical devices, and 5G RF power amplifier bias circuits requiring stable component supply with full AEC-Q101 traceability.

Supply support for SZBZX84C27LT1G 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 management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

SZBZX84C27LT1G belongs to the SZBZX84CxxxLT1G series of AEC-Q101-qualified Zener diodes engineered specifically for automotive electronics where reliability, thermal stability, and supply chain continuity are critical.

FAQ

What is the Zener voltage tolerance of SZBZX84C27LT1G?

The SZBZX84C27LT1G has a nominal Zener voltage of 27 V with a tolerance of ±5.6%, corresponding to a guaranteed range of 25.1 V to 28.9 V at 5 mA test current. This tolerance is defined per the BZX84CxxxLT1G series standard and confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet.

Is SZBZX84C27LT1G qualified for automotive applications?

Yes, SZBZX84C27LT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, making it suitable for engine control units, ADAS modules, and body electronics.

What is the thermal resistance of SZBZX84C27LT1G on FR-5 board?

The thermal resistance junction-to-ambient (R_JA) for SZBZX84C27LT1G is 500 °C/W when mounted on FR-5 board, derived from the Maximum Ratings table (page 2). This value assumes 25°C ambient and defines the temperature rise per watt of dissipated power under standard board conditions.

Does SZBZX84C27LT1G have a connected pin 2?

No, pin 2 of SZBZX84C27LT1G is internally unconnected (NC), as confirmed in the Pinout diagrams on pages 3 and 6 of the datasheet and the mechanical outline on page 7. Only pins 1 (anode) and 3 (cathode) carry functional current; pin 2 must remain floating in PCB layout.

What is the maximum reverse leakage current for SZBZX84C27LT1G?

The maximum reverse leakage current for SZBZX84C27LT1G is 0.05 μA at a reverse voltage (V_R) of 20.3 V, as specified in the Electrical Characteristics table on page 3. This parameter ensures minimal standby power loss in battery-powered systems where quiescent current is critical.

SZBZX84C27LT1G 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):: 27 V

Tolerance:: ±7%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 18.9 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)

SZBZX84C27LT1G FAQ

1.How can I place an order for SZBZX84C27LT1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C27LT1G 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 SZBZX84C27LT1G reliable?

The price and inventory of SZBZX84C27LT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C27LT1G is usually 5 days.

3.What payment methods are accepted for SZBZX84C27LT1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C27LT1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C27LT1G?

SZBZX84C27LT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C27LT1G 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 SZBZX84C27LT1G?

For technical support, including SZBZX84C27LT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C27LT1G requirements.

6.How does Aetrix verify that SZBZX84C27LT1G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C27LT1G 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 SZBZX84C27LT1G meets industry standards.

7.What is the process for return or replacement of SZBZX84C27LT1G?

All SZBZX84C27LT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C27LT1G, 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 SZBZX84C27LT1G part is unused and in its original packaging.

Return procedure for SZBZX84C27LT1G:

1.Submit a request within 90 days.

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

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