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

Nexperia USA Inc. BZX84-B33,215

Name: BZX84-B33,215
Brand: Nexperia USA Inc.
SKU: BZX84-B33,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-B33,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-B33,215.pdf

Description:: DIODE ZENER 33V 250MW TO236AB

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Product details

Overview

BZX84-B33,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 33 V nominal breakdown voltage at I_Z = 2 mA, with 250 mW total power dissipation and 45 Ω maximum differential resistance. It operates across −55 °C to +150 °C ambient, serving as a precision reference or overvoltage clamp in low-power analog supply rails.

For engineers reviewing the BZX84-B33,215 datasheet, BZX84-B33,215 pinout, BZX84-B33,215 application, or BZX84-B33,215 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (330 K/W junction-to-solder-point), non-repetitive surge capability (0.9 A peak reverse current), and SOT23 footprint compatibility with automated PCB assembly.

Technical Context

This device functions as a two-terminal shunt voltage regulator, maintaining stable output voltage by conducting reverse current above its specified Zener breakdown threshold. Its operation relies on controlled avalanche breakdown in silicon, with temperature coefficient of +23.1 mV/K at I_Z = 2 mA - indicating positive drift with rising junction temperature.

The diode exhibits 45 Ω typical dynamic impedance at 2 mA test current, enabling predictable regulation under small-signal load variations. With 0.9 V forward voltage at 10 mA and 200 mA absolute maximum forward current, it supports bidirectional biasing but is optimized for reverse-biased regulation duty.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	32.3 V to 33.7 V at I_Z = 2 mA - defines regulated output range for feedback or reference use
Tolerance	±2 % - ensures tight voltage matching across production lots without trimming
Differential Resistance (r_dif)	≤45 Ω at I_Z = 2 mA - determines regulation stiffness against load current changes
Total Power Dissipation (P_tot)	250 mW at T_amb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Non-repetitive Peak Reverse Current (I_ZSM)	0.9 A for t_p = 100 μs - enables transient overvoltage clamping in ESD/surge protection
Junction-to-Solder-Point Thermal Resistance (R_th(j-sp))	330 K/W - quantifies heat transfer efficiency from die to PCB copper via cathode tab
Reverse Current (I_R)	≤5 μA at V_R = 24.8 V - confirms low leakage below regulation knee, critical for battery-powered circuits

Pinout & Package

Supplied in SOT23 (TO-236AB) plastic surface-mount package: 3-lead, 1.3 mm × 2.9 mm body, 0.95 mm height, gull-wing leads with 0.95 mm pitch. Mounting requires standard reflow profile per IPC-J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Anode connection	Connected to lower-potential node; reverse-biased during regulation
2 (n.c.)	No connection	Internally unconnected lead - must remain floating, not tied to ground or trace
3 (Cathode)	Cathode connection	Connected to higher-potential node; primary heat path to PCB via solder point

Key Features

Feature	Design Value
±2 % Zener voltage tolerance	Enables direct replacement in 33 V reference designs without recalibration or resistor adjustment
250 mW power rating at 25 °C ambient	Supports continuous regulation in space-constrained consumer and industrial PCBs without heatsinking
330 K/W junction-to-solder-point thermal resistance	Allows >100 °C junction rise with only ~80 °C PCB temperature rise under full load
0.9 A non-repetitive peak reverse current	Clamps 40 W surges (100 μs) - suitable for IEC 61000-4-5 Level 3 line transients
SOT23 footprint compatibility	Integrates into high-density layouts using industry-standard pick-and-place and reflow processes

Applications

Power Supply Reference

Overvoltage Clamp

Use Scenario: Stabilizing feedback voltage in adjustable linear regulators (e.g., LM317-based 33 V output).

IC Role / Device Role / Timing Role: Shunt reference providing precise 33 V setpoint to error amplifier input.

Use Value: ±2 % tolerance eliminates need for external trim pot; 45 Ω r_dif maintains <1 % output variation across 1–10 mA load shifts.

Use Scenario: Protecting microcontroller I/O pins from 36 V industrial bus transients.

IC Role / Device Role / Timing Role: Fast-acting crowbar clamping reverse voltage before damage threshold.

Use Value: 0.9 A I_ZSM handles 36 V × 25 ms surges; 0.9 V forward drop limits forward conduction during polarity reversal.

Signal Level Shifting

Temperature-Stable Biasing

Use Scenario: Converting 5 V logic signals to 33 V interface levels in PLC input modules.

IC Role / Device Role / Timing Role: Passive level translator using Zener clamp topology.

Use Value: 32.3–33.7 V regulation window ensures clean high-state definition; low capacitance (<45 pF) preserves signal edge integrity up to 10 MHz.

Use Scenario: Generating stable bias for op-amp input stages in wide-temperature instrumentation.

IC Role / Device Role / Timing Role: Temperature-compensated reference source with known drift coefficient.

Use Value: +23.1 mV/K SZ enables predictable offset correction; 150 °C max T_j supports operation in sealed enclosures at 85 °C ambient.

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 MMBZ5262B	33 V ±5 % tolerance; 350 mW P_tot; 70 Ω r_dif	Looser voltage accuracy but higher power margin; suited for less critical references	Select when cost sensitivity outweighs regulation precision and thermal constraints allow larger derating
Vishay BZX84-C33	33 V ±5 % tolerance; identical SOT23 package and 250 mW rating	Higher leakage (≤10 μA at 24.8 V) and wider V_Z spread reduce stability in precision circuits	Choose only for non-critical clamping where ±5 % tolerance is acceptable and board space prohibits larger packages

Compared with MMBZ5262B and BZX84-C33, the BZX84-B33,215 delivers tighter voltage control and lower dynamic impedance for stable reference generation, while maintaining identical SOT23 fit and 250 mW thermal envelope - making it optimal for precision analog and compact industrial designs.

Availability

BZX84-B33,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) input conditioning, and embedded power management systems requiring stable component supply and long-term obsolescence support.

Supply support for BZX84-B33,215 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 and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZX84 series belongs to Nexperia's precision Zener regulator portfolio, engineered for cost-sensitive yet performance-demanding applications in industrial automation, consumer power supplies, and communication infrastructure where stable voltage references are essential.

FAQ

What is the maximum continuous reverse current this diode can handle at 25 °C ambient?

The BZX84-B33,215 is rated for 200 mA maximum forward current, but as a Zener regulator, its continuous reverse current is limited by power dissipation. At 25 °C ambient and 33 V breakdown, the maximum continuous reverse current is approximately 7.6 mA (250 mW ÷ 33 V), assuming no additional PCB copper cooling beyond the standard FR4 footprint.

Can Pin 2 (n.c.) be grounded or left unconnected on the PCB?

Pin 2 is internally not connected and must remain electrically floating - neither grounded nor tied to any net. Connecting it risks mechanical stress on the bond wire or unintended parasitic coupling. The SOT23 footprint should assign Pin 2 to a non-plated or isolated pad per Nexperia's recommended layout in Figure 12.

How does the +23.1 mV/K temperature coefficient affect regulation accuracy over −40 °C to +85 °C?

With a +23.1 mV/K coefficient, the Zener voltage increases by ~2.9 V across a 125 K junction temperature swing (from 25 °C to 150 °C). Over the more typical −40 °C to +85 °C ambient range, assuming 30 K self-heating, V_Z shifts ~1.1 V - requiring system-level compensation if sub-1 % accuracy is needed across temperature.

Is this part qualified for automotive applications?

No. Per Nexperia's Revision 7 datasheet (January 2023), the BZX84-B33,215 is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia offers separate -Q qualified variants such as the BZX84-Q series, which must be selected instead.

BZX84-B33,215 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:: ±2%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 23.1 V

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-B33,215 FAQ

1.How can I place an order for BZX84-B33,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-B33,215 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-B33,215 reliable?

The price and inventory of BZX84-B33,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B33,215 is usually 5 days.

3.What payment methods are accepted for BZX84-B33,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B33,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-B33,215?

BZX84-B33,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-B33,215 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-B33,215?

For technical support, including BZX84-B33,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B33,215 requirements.

6.How does Aetrix verify that BZX84-B33,215 is sourced from the original manufacturer or authorized distributors?

All BZX84-B33,215 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-B33,215 meets industry standards.

7.What is the process for return or replacement of BZX84-B33,215?

All BZX84-B33,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B33,215, 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-B33,215 part is unused and in its original packaging.

Return procedure for BZX84-B33,215:

1.Submit a request within 90 days.

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

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