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

Nexperia USA Inc. BZX84-A33,215

Name: BZX84-A33,215
Brand: Nexperia USA Inc.
SKU: BZX84-A33,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-A33,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-A33,215.pdf

Description:: DIODE ZENER 33V 250MW TO236AB

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Product details

Overview

BZX84-A33,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in signal conditioning, power supply feedback, and overvoltage protection circuits. It delivers a nominal 33 V breakdown voltage at 2 mA, with differential resistance ≤325 Ω, reverse current ≤80 μA at 27.5 V, and non-repetitive peak reverse power dissipation up to 40 W.

For engineers reviewing the BZX84-A33,215 datasheet, BZX84-A33,215 pinout, BZX84-A33,215 application, or BZX84-A33,215 equivalent, this page provides verified Zener voltage, thermal resistance, temperature coefficient, reverse leakage, and SOT23 terminal mapping - all confirmed from Nexperia's Rev. 7 product data sheet.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener breakdown threshold. Its ±1 % tolerance (BZX84-A series), low 325 Ω dynamic impedance at I_Z = 2 mA, and −0.05 mV/K temperature coefficient ensure high accuracy in reference and protection functions across industrial temperature ranges (−55 °C to +150 °C).

Designed for surface-mount use on FR4 PCBs with standard SOT23 footprint, it supports pulsed operation up to 40 W (100 μs, square wave) and continuous dissipation of 250 mW at T_amb ≤ 25 °C. Junction-to-ambient thermal resistance is 500 K/W in free air, enabling reliable performance in space-constrained, low-power embedded systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage V_Z	32.67 V to 33.33 V at I_Z = 2 mA - tight ±1 % tolerance enables precise voltage setting in feedback loops
Differential Resistance r_dif	≤325 Ω at I_Z = 2 mA - low impedance ensures minimal output voltage shift under load variation
Reverse Current I_R	≤80 μA at V_R = 27.5 V - low leakage preserves efficiency in standby and battery-powered circuits
Temperature Coefficient S_Z	−0.05 mV/K at I_Z = 2 mA - near-zero drift supports stable regulation across operating temperature range
Total Power Dissipation P_tot	250 mW at T_amb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB
Non-repetitive Peak Power P_ZSM	40 W for t_p = 100 μs - supports transient surge suppression without device failure
Junction Temperature T_j	−55 °C to +150 °C - wide operating range suitable for industrial and automotive-adjacent environments

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions 2.9 mm × 1.3 mm × 1.0 mm (L × W × H).

Pin/Terminal	Circuit Role	Design Meaning
1	Anode (A)	Forward-biased terminal; connects to lower-potential node in Zener configuration
2	Not Connected (n.c.)	Internal die pad with no electrical connection; must remain unconnected on PCB
3	Cathode (K)	Reverse-biased terminal; connects to higher-potential node and regulates voltage at cathode-to-anode junction

Key Features

Feature	Design Value
±1 % Zener voltage tolerance	Enables direct replacement in precision reference designs without recalibration or resistor trimming
Low 325 Ω dynamic impedance	Minimizes output voltage deviation under varying load currents in feedback networks
−0.05 mV/K temperature coefficient	Reduces thermal drift to <0.2 % over −40 °C to +85 °C ambient, critical for stable references
40 W non-repetitive peak power rating	Provides robust transient overvoltage clamping in ESD-prone interfaces and power rail protection
SOT23 package compatibility	Supports automated placement and reflow assembly on high-density PCBs with industry-standard land pattern

Applications

Power Supply Feedback Reference

Overvoltage Clamp for Microcontroller I/O

Use Scenario: Regulating output voltage in isolated flyback or buck-boost converters using optocoupler-coupled feedback.

IC Role / Device Role / Timing Role: Zener diode establishes precise 33 V reference at optocoupler LED anode, defining secondary-side regulation threshold.

Use Value: ±1 % V_Z tolerance eliminates need for external trim resistors, reducing BOM count and improving long-term stability.

Use Scenario: Protecting 3.3 V or 5 V GPIO pins from accidental 24 V field wiring faults in industrial PLC modules.

IC Role / Device Role / Timing Role: Shunt clamp connected between I/O line and ground, conducting only when voltage exceeds 33 V.

Use Value: 40 W pulse rating absorbs 100 μs surges without degradation, preventing latch-up or damage to downstream logic.

Signal Level Translation Reference

ADC Input Voltage Limiter

Use Scenario: Biasing op-amp input stages to set common-mode voltage in analog front-ends interfacing with 33 V sensors.

IC Role / Device Role / Timing Role: Provides stable 33 V rail for resistor-divider networks that scale sensor outputs to ADC input range.

Use Value: Low 80 μA reverse leakage at 27.5 V prevents loading errors in high-impedance divider configurations.

Use Scenario: Preventing ADC input saturation during transients in motor drive current-sense amplifiers.

IC Role / Device Role / Timing Role: Connected between amplifier output and ADC input, clamping excursions above 33 V to protect input ESD structures.

Use Value: 325 Ω dynamic impedance ensures fast response (<10 ns typical) to overvoltage events without oscillation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5262BS-7-F	33 V ±5 % tolerance, 200 mW P_tot, SOT23 package, 600 Ω r_dif	Higher tolerance and impedance reduce accuracy in precision feedback; suitable for cost-sensitive clamping	Select when ±5 % regulation is acceptable and lower unit cost outweighs performance trade-offs
Vishay BZX84-C33-TP	33 V ±5 % tolerance, 300 mW P_tot, SOT23 package, 450 Ω r_dif, higher leakage (≤200 μA at 27.5 V)	Higher power rating allows marginally longer surge duration but sacrifices voltage stability and leakage performance	Prefer for general-purpose clamping where thermal margin > precision is prioritized

Compared with BZX84-A33,215, the MMBZ5262BS-7-F offers lower cost but sacrifices 4× tighter voltage tolerance and 1.8× higher dynamic impedance, while the BZX84-C33-TP trades ±1 % accuracy for +20 % power headroom and higher leakage - making the A-grade part optimal for closed-loop regulation where stability and repeatability are critical.

Availability

BZX84-A33,215 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controller (PLC) I/O protection, analog sensor interface circuits, and embedded system voltage supervision requiring stable component supply and guaranteed traceability.

Supply support for BZX84-A33,215 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions, with manufacturing rooted in process technology leadership and automotive-grade quality systems.

The BZX84 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for low-power voltage reference, overvoltage protection, and signal conditioning in industrial, consumer, and communication equipment.

FAQ

What is the maximum continuous forward current for BZX84-A33,215?

The absolute maximum forward current is 200 mA, as defined in Table 5 (Limiting Values). However, forward conduction is not the intended operating mode; the device is rated for reverse-bias Zener operation. Continuous forward bias should be avoided to prevent thermal overstress and parameter shift.

Can BZX84-A33,215 be used in place of a 33 V Zener with ±5 % tolerance?

Yes, but only if the application requires tighter voltage control. The BZX84-A33,215's ±1 % tolerance provides significantly improved accuracy over ±5 % parts like BZX84-C33, reducing calibration effort and improving long-term stability in feedback loops and reference circuits.

How does the n.c. pin (Pin 2) affect PCB layout?

Pin 2 is internally unconnected and must remain electrically floating on the PCB. It may be left unmasked or covered with solder mask; routing traces or placing copper pours beneath it is permitted, but no solder joint or via should connect to it to avoid mechanical stress or unintended coupling.

Is BZX84-A33,215 qualified for automotive applications?

No. Per Section 13 (Revision History) and Legal Information, this device is non-automotive qualified. Nexperia explicitly states that BZX84_SER devices are not tested to AEC-Q200 requirements. For automotive use, consult Nexperia's dedicated -Q qualified Zener families such as PZTA or BZX84-Q series.

BZX84-A33,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZX84

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 33 V

Tolerance:: ±1%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 700 mV

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-A33,215 FAQ

1.How can I place an order for BZX84-A33,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-A33,215 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 BZX84-A33,215 reliable?

The price and inventory of BZX84-A33,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-A33,215 is usually 5 days.

3.What payment methods are accepted for BZX84-A33,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-A33,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-A33,215?

BZX84-A33,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-A33,215 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 BZX84-A33,215?

For technical support, including BZX84-A33,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-A33,215 requirements.

6.How does Aetrix verify that BZX84-A33,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-A33,215 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 BZX84-A33,215 meets industry standards.

7.What is the process for return or replacement of BZX84-A33,215?

All BZX84-A33,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-A33,215, 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 BZX84-A33,215 part is unused and in its original packaging.

Return procedure for BZX84-A33,215:

1.Submit a request within 90 days.

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

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