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

Nexperia USA Inc. BZX84-C10/DG/B3,21

Name: BZX84-C10/DG/B3,21
Brand: Nexperia USA Inc.
SKU: BZX84-C10/DG/B3,21
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZX84-C10/DG/B3,21

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

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

Datasheet:: BZX84-C10/DG/B3,21.pdf

Description:: DIODE ZENER 10V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:8,449

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Product details

Overview

BZX84-C10/DG/B3,21 from Nexperia is a 10 V, 250 mW surface-mount Zener diode in SOT-23 package with ±5% tolerance, 15 Ω dynamic impedance, and 5 µA maximum leakage at 7.5 V, used for voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84-C10/DG/B3,21 datasheet, BZX84-C10/DG/B3,21 pinout, BZX84-C10/DG/B3,21 application, or BZX84-C10/DG/B3,21 equivalent, key selection criteria include Zener voltage accuracy, power dissipation limit, thermal resistance, and SOT-23 footprint compatibility in space-constrained PCB designs.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and input conditions. It features a nominal Zener voltage of 10 V at test current of 5 mA, with a maximum knee resistance of 15 Ω ensuring predictable regulation behavior near knee current.

The device is optimized for low-current biasing and precision reference applications where thermal stability and tight voltage tolerance are required. Its SOT-23 package provides a thermal resistance of 375 K/W (junction-to-ambient), limiting continuous power dissipation to 250 mW at 25 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	10 V ±5% at I_Z = 5 mA - defines regulated output voltage with guaranteed accuracy for reference design
Power Dissipation (P_tot)	250 mW - maximum continuous power handling in SOT-23 package without forced cooling
Dynamic Impedance (Z_ZK)	15 Ω max at I_Z = 1 mA - determines voltage variation under small-signal load changes
Leakage Current (I_R)	5 µA max at V_R = 7.5 V - ensures minimal error current in high-impedance bias networks
Thermal Resistance (R_thJA)	375 K/W - limits junction temperature rise in standard PCB layout with no copper pour
Operating Temperature	−65 °C to +150 °C - supports industrial and automotive under-hood environments

Pinout & Package

Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with standard lead pitch of 0.95 mm and body dimensions 2.9 × 1.3 × 1.0 mm.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reverse-biased cathode connection point	Connected to lower potential side in Zener regulation configuration
Cathode (Pin 2)	Reverse-biased anode connection point	Connected to higher potential side; voltage referenced to this terminal
Not Connected (Pin 3)	Internal die attach pad	Electrically isolated; no external connection required

Key Features

Feature	Design Value
Tight Zener voltage tolerance	±5% at 5 mA enables accurate voltage references without post-calibration
Low dynamic impedance	15 Ω max improves regulation stability under varying load currents
SOT-23 footprint compatibility	Standard 3-pin package allows drop-in replacement in existing layouts
High-temperature operation	Rated up to +150 °C junction temperature supports under-hood and industrial use

Applications

Power Supply Reference

Overvoltage Protection Clamp

Use Scenario: Providing stable 10 V reference for ADC voltage dividers and op-amp bias networks in battery-powered sensors.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference node voltage.

Use Value: ±5% tolerance and 5 µA leakage ensure <0.5% reference error in 12-bit measurement systems.

Use Scenario: Clamping transient overvoltage on 12 V rail in automotive body control modules.

IC Role / Device Role / Timing Role: Shunt protection device diverting surge current above 10 V threshold.

Use Value: 250 mW rating sustains short-duration transients without thermal runaway.

Signal Level Translation

LED Current Regulation

Use Scenario: Biasing logic-level shifters between 3.3 V microcontroller and 10 V industrial I/O interface.

IC Role / Device Role / Timing Role: Voltage translation element establishing intermediate bias point.

Use Value: Low 15 Ω impedance minimizes level-shift error under signal loading.

Use Scenario: Setting constant forward current for indicator LEDs in medical handheld devices.

IC Role / Device Role / Timing Role: Current-limiting shunt regulator in series with LED string.

Use Value: Stable 10 V Zener voltage enables predictable current set via 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
MMBZ5240B,215	10 V ±5%, 350 mW, SOT-23, 17 Ω Z_ZK	Higher power rating allows greater surge margin but same regulation accuracy	Select when >250 mW transient energy absorption is required
BZX84-C10,215	10 V ±5%, 250 mW, SOT-23, identical electrical specs but non-AEC-Q200 grade	Lacks automotive qualification; suitable for commercial-grade designs only	Select for cost-sensitive consumer applications without automotive requirements

Compared with BZX84-C10/DG/B3,21, MMBZ5240B,215 offers higher power headroom while BZX84-C10,215 reduces cost by omitting AEC-Q200 stress testing-both retain identical Zener voltage and SOT-23 footprint for direct layout reuse.

Availability

BZX84-C10/DG/B3,21 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and portable medical instrumentation requiring stable component supply and AEC-Q200 compliance.

Supply support for BZX84-C10/DG/B3,21 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, headquartered in Nijmegen, Netherlands.

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

FAQ

What is the maximum reverse current before breakdown for BZX84-C10/DG/B3,21?

The device exhibits ≤5 µA reverse leakage at 7.5 V, well below its 10 V Zener voltage. Breakdown begins gradually near 9.5 V, with full regulation established at 5 mA test current. This soft knee characteristic requires careful current limiting in clamp configurations to avoid thermal overstress.

Is BZX84-C10/DG/B3,21 qualified for automotive use?

Yes, BZX84-C10/DG/B3,21 is AEC-Q200 qualified for passive components, having passed temperature cycling, humidity testing, and mechanical shock validation per automotive reliability standards. The "DG" suffix denotes AEC-Q200 Grade 2 (−40 °C to +105 °C ambient) compliance.

How does the SOT-23 package affect thermal performance?

With a junction-to-ambient thermal resistance of 375 K/W, the SOT-23 package limits continuous power dissipation to 250 mW at 25 °C ambient. Derating is required above 25 °C-approximately 1.33 mW/°C reduction-to maintain safe junction temperature below 150 °C.

Can BZX84-C10/DG/B3,21 replace through-hole Zeners like 1N4740A?

No-while both regulate at 10 V, the 1N4740A is a 1 W through-hole device with different thermal mass and mounting. Direct replacement requires verifying PCB layout, power derating, and transient energy handling; SOT-23 cannot dissipate equivalent energy without board-level thermal enhancement.

BZX84-C10/DG/B3,21 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):: 10 V

Tolerance:: ±5%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 200 nA @ 7 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-C10/DG/B3,21 FAQ

1.How can I place an order for BZX84-C10/DG/B3,21 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZX84-C10/DG/B3,21 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-C10/DG/B3,21 reliable?

The price and inventory of BZX84-C10/DG/B3,21 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C10/DG/B3,21 is usually 5 days.

3.What payment methods are accepted for BZX84-C10/DG/B3,21?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C10/DG/B3,21 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZX84-C10/DG/B3,21?

BZX84-C10/DG/B3,21 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZX84-C10/DG/B3,21 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-C10/DG/B3,21?

For technical support, including BZX84-C10/DG/B3,21 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C10/DG/B3,21 requirements.

6.How does Aetrix verify that BZX84-C10/DG/B3,21 is sourced from the original manufacturer or authorized distributors?

All BZX84-C10/DG/B3,21 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-C10/DG/B3,21 meets industry standards.

7.What is the process for return or replacement of BZX84-C10/DG/B3,21?

All BZX84-C10/DG/B3,21 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C10/DG/B3,21, 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-C10/DG/B3,21 part is unused and in its original packaging.

Return procedure for BZX84-C10/DG/B3,21:

1.Submit a request within 90 days.

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

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