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

Nexperia USA Inc. BZX84-C33/DG/B2,23

Name: BZX84-C33/DG/B2,23
Brand: Nexperia USA Inc.
SKU: BZX84-C33/DG/B2,23
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C33/DG/B2,23

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C33/DG/B2,23.pdf

Description:: DIODE ZENER 33V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:3,024

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Product details

Overview

BZX84-C33/DG/B2,23 from Nexperia is a 33 V, 250 mW surface-mount Zener diode in SOT23 package with ±5% tolerance, 100 nA maximum leakage at 24.5 V, and 90 Ω dynamic impedance at 5 mA test current - used for voltage regulation and overvoltage protection in low-power sensor interface circuits.

For engineers reviewing the BZX84-C33/DG/B2,23 datasheet, BZX84-C33/DG/B2,23 pinout, BZX84-C33/DG/B2,23 application, or BZX84-C33/DG/B2,23 equivalent, key selection criteria include Zener voltage tolerance, power dissipation limit, dynamic impedance at operating current, reverse leakage at derated voltage, and SOT23 thermal resistance under PCB copper area constraints.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across its terminals. It is characterized at 5 mA test current with specified Zener voltage (33 V), dynamic impedance (90 Ω), and temperature coefficient (+10.5 mV/K).

The device uses planar epitaxial technology for tight voltage tolerance and low noise. Its SOT23 package supports reflow soldering per JEDEC J-STD-020 and provides thermal resistance of 375 K/W (junction-to-ambient, 0.5 mm² copper pad).

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	33 V ±5% at 5 mA - defines regulated output voltage with guaranteed accuracy for reference design
Power Dissipation (P_tot)	250 mW at T_amb = 25 °C - limits continuous current to ~7.6 mA at 33 V without heatsinking
Dynamic Impedance (Z_ZT)	90 Ω max at I_Z = 5 mA - determines output voltage variation under load current changes
Reverse Leakage (I_R)	100 nA max at V_R = 24.5 V - ensures minimal quiescent current in standby regulation paths
Temperature Coefficient	+10.5 mV/K - quantifies V_Z drift over industrial temperature range (−65 °C to +150 °C)
Package	SOT23 - enables high-density placement and automated assembly on compact PCBs

Pinout & Package

SOT23-3 package with standard pin configuration: Cathode (Pin 1), Anode (Pin 2), and unused terminal (Pin 3) - Pin 3 is internally unconnected and electrically isolated.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Cathode	Connected to regulated voltage node; reverse-biased during Zener operation
Pin 2	Anode	Connected to ground or lower potential reference; completes bias path
Pin 3	NC	No internal connection; must remain unconnected or grounded per layout guidelines

Key Features

Feature	Design Value
Tight voltage tolerance	±5% at 33 V enables accurate analog reference without post-calibration
Low dynamic impedance	90 Ω allows <1% output deviation under ±1 mA load step in feedback networks
Low leakage current	100 nA at 24.5 V minimizes error in high-impedance voltage divider interfaces
SOT23 thermal performance	375 K/W junction-to-ambient (0.5 mm² pad) supports stable operation up to 125 °C ambient

Applications

Industrial Sensor Signal Conditioning

USB Port Overvoltage Clamp

Use Scenario: Regulating excitation voltage for 4–20 mA loop-powered pressure transducers.

IC Role / Device Role / Timing Role: Zener diode providing stable 33 V rail for op-amp bias and ADC reference scaling.

Use Value: ±5% tolerance ensures consistent sensor gain calibration across production batches.

Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events.

IC Role / Device Role / Timing Role: Standby Zener clamp absorbing >1 kV ESD pulses per IEC 61000-4-2 Level 4.

Use Value: 100 nA leakage avoids loading USB enumeration circuitry during idle state.

Automotive Body Control Module (BCM) Reference

IoT Node Battery Monitor Threshold

Use Scenario: Generating precise 33 V reference for microcontroller ADC monitoring of 12 V battery health.

IC Role / Device Role / Timing Role: Zener-based voltage reference feeding into resistive divider for battery voltage sensing.

Use Value: +10.5 mV/K tempco enables software compensation for battery voltage readings across −40 °C to +105 °C.

Use Scenario: Setting low-battery warning threshold in coin-cell-powered BLE sensors.

IC Role / Device Role / Timing Role: Zener diode establishing fixed 33 V trip point for comparator input.

Use Value: 250 mW rating allows direct drive of comparator hysteresis network without series resistor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C33,215	Same electrical specs; different marking code and tape/reel packaging (7" reel vs. 13" reel)	No functional difference; identical SOT23 footprint and thermal behavior	Select for compatibility with existing pick-and-place feeder setup
MMSZ5257B-TP	33 V ±5%, 500 mW rating, higher power but larger SOD-123 package (R_θJA = 500 K/W)	Requires more PCB area; suitable where higher surge energy absorption is needed	Choose when transient clamping duty cycle exceeds 250 mW average limit

Compared with BZX84-C33/DG/B2,23, the BZX84-C33,215 offers identical regulation performance in alternate packaging, while MMSZ5257B-TP trades smaller size for double power handling - critical for intermittent overvoltage events in automotive reset circuits.

Availability

BZX84-C33/DG/B2,23 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, automotive body control modules, and IoT battery monitoring systems requiring stable component supply and long-term obsolescence management.

Supply support for BZX84-C33/DG/B2,23 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 components and advanced packaging.

This part belongs to the BZX84-C series of precision Zener diodes designed specifically for voltage reference and overvoltage protection in space-constrained, cost-sensitive consumer and industrial electronics.

FAQ

What is the maximum reverse current before breakdown for BZX84-C33/DG/B2,23?

The device exhibits less than 100 nA reverse leakage at 24.5 V, well below its 33 V Zener voltage. Breakdown begins gradually above 31.35 V (−5% tolerance limit), with full regulation established at 5 mA test current per datasheet definition.

Can BZX84-C33/DG/B2,23 be used in parallel for higher power dissipation?

No - Zener diodes exhibit manufacturing spread in V_Z, causing current imbalance. Parallel use risks thermal runaway. For >250 mW needs, select a single higher-power device like MMSZ5257B-TP or implement active regulation.

Is Pin 3 of the SOT23 package electrically connected?

No - Pin 3 is internally unconnected (NC) and must not be bonded to any net. Layout guidelines require it to remain floating or optionally tied to ground only if mechanical stability demands it, with no electrical function.

How does temperature affect the 33 V regulation accuracy?

V_Z increases by +10.5 mV per Kelvin rise. At 100 °C ambient (ΔT = +75 K from 25 °C), V_Z shifts +0.79 V - resulting in 33.79 V nominal regulation, still within ±5% band (31.35–34.65 V) across full operating range.

BZX84-C33/DG/B2,23 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

Tolerance:: ±5%

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 (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZX84-C33/DG/B2,23 FAQ

1.How can I place an order for BZX84-C33/DG/B2,23 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C33/DG/B2,23 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-C33/DG/B2,23 reliable?

The price and inventory of BZX84-C33/DG/B2,23 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C33/DG/B2,23 is usually 5 days.

3.What payment methods are accepted for BZX84-C33/DG/B2,23?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C33/DG/B2,23 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C33/DG/B2,23?

BZX84-C33/DG/B2,23 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C33/DG/B2,23 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-C33/DG/B2,23?

For technical support, including BZX84-C33/DG/B2,23 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C33/DG/B2,23 requirements.

6.How does Aetrix verify that BZX84-C33/DG/B2,23 is sourced from the original manufacturer or authorized distributors?

All BZX84-C33/DG/B2,23 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-C33/DG/B2,23 meets industry standards.

7.What is the process for return or replacement of BZX84-C33/DG/B2,23?

All BZX84-C33/DG/B2,23 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C33/DG/B2,23, 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-C33/DG/B2,23 part is unused and in its original packaging.

Return procedure for BZX84-C33/DG/B2,23:

1.Submit a request within 90 days.

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

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