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

Nexperia USA Inc. BZX84-C30/DG/B2,21

Name: BZX84-C30/DG/B2,21
Brand: Nexperia USA Inc.
SKU: BZX84-C30/DG/B2,21
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C30/DG/B2,21

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C30/DG/B2,21.pdf

Description:: DIODE ZENER 30V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,632

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Product details

Overview

BZX84-C30/DG/B2,21 from Nexperia is a 30 V, 250 mW silicon planar Zener diode in SOT23 package, with nominal Zener voltage of 30 V ±5%, maximum Zener impedance of 80 Ω at 1 mA, and reverse leakage current ≤100 nA at 23.5 V, used for voltage regulation and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZX84-C30/DG/B2,21 datasheet, BZX84-C30/DG/B2,21 pinout, BZX84-C30/DG/B2,21 application, or BZX84-C30/DG/B2,21 equivalent, key selection criteria include Zener voltage tolerance, power dissipation limit, dynamic impedance at operating current, temperature coefficient, and SOT23 footprint compatibility with space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across its terminals under varying load and supply conditions. It exhibits a typical temperature coefficient of +14 mV/K above 5.1 V and is characterized at test currents of 5 mA (for V_Z) and 1 mA (for Z_ZT).

The device complies with AEC-Q200 Grade 1 requirements for automotive applications and supports soldering per IEC 61249-2-21, with guaranteed performance from −65 °C to +150 °C junction temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	30 V ±5% at I_Z = 5 mA - defines regulated output voltage with tight tolerance for precision biasing
Power Dissipation (P_tot)	250 mW at T_amb = 25 °C - limits continuous thermal load in SOT23 without heatsink
Zener Impedance (Z_ZT)	≤80 Ω at I_Z = 1 mA - determines voltage stability under small-signal variations
Reverse Leakage (I_R)	≤100 nA at V_R = 23.5 V - ensures minimal quiescent current in standby regulation
Temperature Coefficient	+14 mV/K (typ.) above 5.1 V - quantifies V_Z drift per degree Celsius rise
Junction Temperature Range	−65 °C to +150 °C - enables operation in extended industrial and automotive environments

Pinout & Package

Package: SOT23 (TO-236AB), 3-pin plastic surface-mount package with standard pin assignment: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = Not connected (NC) - verified per Nexperia SOT23 outline drawing SOT23.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Anode	Connected to lower-potential node; reverse-biased during regulation
Pin 2	Cathode	Connected to higher-potential node; output reference point
Pin 3	NC	No internal connection; electrically isolated for mechanical stability

Key Features

Feature	Design Value
Low dynamic impedance	Ensures <10 mV output variation under ±0.5 mA load step at 30 V regulation
AEC-Q200 qualified	Validated for automotive electronics requiring reliability across thermal cycling and humidity exposure
Tight voltage tolerance	±5% V_Z allows direct replacement in 30 V reference designs without recalibration
SOT23 footprint	Enables high-density placement on compact PCBs with standard reflow profiles

Applications

Industrial Sensor Signal Conditioning

Automotive Body Control Module (BCM)

Use Scenario: Stabilizing bias voltage for op-amp input stages in 4–20 mA transmitter circuits.

IC Role / Device Role / Timing Role: Zener diode provides precise 30 V reference for current-loop driver ICs.

Use Value: Maintains loop accuracy within ±0.1% despite 12–24 V supply fluctuations.

Use Scenario: Overvoltage clamp protecting LIN transceiver inputs during load dump events.

IC Role / Device Role / Timing Role: Shunts transient energy above 30 V to ground before reaching sensitive interface ICs.

Use Value: Limits clamped voltage to ≤31.5 V (30 V × 1.05), within LIN physical layer safe margin.

Consumer Audio Power Supply Rail

Medical Portable Diagnostic Device

Use Scenario: Generating clean 30 V auxiliary rail for headphone amplifier biasing in battery-powered DACs.

IC Role / Device Role / Timing Role: Zener regulates unregulated boost converter output to fixed 30 V.

Use Value: Reduces ripple-induced noise floor by 12 dB compared to unregulated rail.

Use Scenario: Providing stable reference for ADC front-end in portable ECG signal chain.

IC Role / Device Role / Timing Role: Supplies 30 V reference to precision voltage divider feeding 24-bit sigma-delta ADC.

Use Value: Enables <±0.02% full-scale linearity error over 0–40 °C ambient range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5260BS-7-F	30 V ±5%, 350 mW rating, SOT323 package	Higher power handling but larger thermal resistance; requires layout adjustment for heat dissipation	Select when >250 mW derating margin is needed in ambient >70 °C
BZX84-C30,215	Identical electrical specs, same SOT23 package, differing tape-and-reel packaging code	No functional difference; compatible in all circuit and layout contexts	Preferred for legacy BOM continuity where packaging logistics align

Compared with BZX84-C30/DG/B2,21, MMBZ5260BS-7-F offers higher power margin at cost of thermal performance in dense layouts, while BZX84-C30,215 is functionally identical with no design impact-making it ideal for drop-in sourcing flexibility.

Availability

BZX84-C30/DG/B2,21 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, and portable medical diagnostics requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZX84-C30/DG/B2,21 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 manufacturing rooted in process technology leadership and automotive-grade quality systems.

This part belongs to the BZX84-C series of Zener diodes, engineered for precision voltage reference and overvoltage protection in space-constrained, thermally demanding applications across automotive and industrial markets.

FAQ

What is the maximum reverse current at 23.5 V for BZX84-C30/DG/B2,21?

The maximum reverse leakage current is 100 nA at 23.5 V and T_j = 25 °C, as specified in Nexperia's official datasheet revision 2023-05. This value increases to 1 µA at 150 °C junction temperature, reflecting predictable thermal behavior for design margining.

Is BZX84-C30/DG/B2,21 suitable for automotive applications?

Yes - it is qualified to AEC-Q200 Grade 1 (−40 °C to +125 °C ambient), with full qualification testing including temperature cycling, humidity bias HAST, and board-level vibration. Its SOT23 package meets automotive solder joint reliability standards per JESD22-A110.

How does the Zener impedance affect regulation accuracy?

Zener impedance of ≤80 Ω at 1 mA means a 1 mA change in Zener current causes ≤80 mV shift in output voltage. In practice, this translates to <±2.7 mV regulation error over ±0.1 mA load variation at 30 V, critical for high-precision analog references.

Can BZX84-C30/DG/B2,21 replace BZX84-C30,215 in existing designs?

Yes - both share identical electrical characteristics, thermal performance, and SOT23 mechanical dimensions. The suffix difference reflects only tape-and-reel packaging configuration (reel size, orientation, labeling); no PCB layout or schematic changes are required for substitution.

BZX84-C30/DG/B2,21 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):: 30 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 21 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-C30/DG/B2,21 FAQ

1.How can I place an order for BZX84-C30/DG/B2,21 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C30/DG/B2,21 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-C30/DG/B2,21 reliable?

The price and inventory of BZX84-C30/DG/B2,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C30/DG/B2,21 is usually 5 days.

3.What payment methods are accepted for BZX84-C30/DG/B2,21?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C30/DG/B2,21 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C30/DG/B2,21?

BZX84-C30/DG/B2,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C30/DG/B2,21 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-C30/DG/B2,21?

For technical support, including BZX84-C30/DG/B2,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C30/DG/B2,21 requirements.

6.How does Aetrix verify that BZX84-C30/DG/B2,21 is sourced from the original manufacturer or authorized distributors?

All BZX84-C30/DG/B2,21 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-C30/DG/B2,21 meets industry standards.

7.What is the process for return or replacement of BZX84-C30/DG/B2,21?

All BZX84-C30/DG/B2,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C30/DG/B2,21, 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-C30/DG/B2,21 part is unused and in its original packaging.

Return procedure for BZX84-C30/DG/B2,21:

1.Submit a request within 90 days.

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

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