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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Zener Diode Arrays

Nexperia USA Inc. BZB84-C12,215

Name: BZB84-C12,215
Brand: Nexperia USA Inc.
SKU: BZB84-C12,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZB84-C12,215

Manufacturer:: Nexperia USA Inc.

Category:: Zener Diode Arrays

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

Datasheet:: BZB84-C12,215.pdf

Description:: DIODE ZENER ARRAY 12V SOT23

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Product details

Overview

BZB84-C12,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 12 V nominal Zener voltage (11.4–12.7 V), ±5 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualified for automotive use. It provides bidirectional voltage regulation in compact space-constrained designs such as ECU power rail clamping and sensor signal conditioning.

For engineers reviewing the BZB84-C12,215 datasheet, BZB84-C12,215 pinout, BZB84-C12,215 application, or BZB84-C12,215 equivalent, this page delivers verified Zener voltage range, thermal resistance, differential resistance, non-repetitive surge capability, and dual-diode configuration details essential for automotive-grade voltage reference and overvoltage protection design.

Technical Context

This dual Zener diode integrates two independent Zener elements sharing a common anode (Pin 3), enabling symmetrical clamping of positive and negative transients across a single node. Its 12 V nominal working voltage targets mid-range supply rail stabilization where temperature coefficient stability (±6.0 mV/K) and low differential resistance (150 Ω max at I_Z = 2 mA) are critical.

Designed for surface-mount reliability, it supports pulsed reverse power up to 40 W (t_p = 100 µs, square wave) and operates across −55 °C to +150 °C ambient, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB - key for thermally constrained automotive modules.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.4 V to 12.7 V at I_Z = 2 mA - defines precise clamping threshold for 12 V system rails
Tolerance	±5 % - enables cost-effective selection for non-critical regulation without tight-bin sorting
Total Power Dissipation (P_tot)	300 mW at T_amb ≤ 25 °C - sets continuous DC power limit before thermal derating begins
Differential Resistance (r_dif)	≤150 Ω at I_Z = 2 mA - ensures stable regulation under varying load current
Non-repetitive Peak Reverse Current (I_ZSM)	2.5 A at t_p = 100 µs - supports transient suppression of short-duration ESD or load-dump spikes
Thermal Resistance (R_th(j-a))	417 K/W - determines junction temperature rise per watt on standard FR4 PCB
Reverse Current (I_R)	≤0.10 µA at V_R = 9.4 V - guarantees low leakage below clamping threshold

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small outline, lead pitch 0.95 mm, body size 2.9 × 1.3 × 1.0 mm - optimized for high-density automotive PCB layouts and reflow compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (Diode 1)	Connects to regulated node for forward-biased conduction or reverse-biased Zener clamping
2	Cathode (Diode 2)	Enables second independent clamping path - used for bidirectional transient suppression
3	Common Anode	Shared anode reference point; ties both Zeners to ground or system return plane

Key Features

Feature	Design Value
Dual common-anode configuration	Enables single-point bidirectional voltage clamping without discrete pairing or routing overhead
AEC-Q101 qualification	Validated for automotive under-hood applications including engine control units and body electronics
±5 % Zener voltage tolerance (C-series)	Reduces BOM complexity versus tighter-tolerance variants while maintaining functional safety margins
40 W non-repetitive peak power rating	Withstands ISO 7637-2 pulse 1/2/5a surges without degradation when properly heatsinked
150 °C maximum junction temperature	Supports operation in high-temperature zones like near power converters or motor drivers

Applications

Automotive Engine Control Unit (ECU) Power Rail Clamping

Industrial Sensor Signal Conditioning

Use Scenario: Protects 12 V microcontroller supply inputs against load dump transients up to 35 V during alternator disconnection.

IC Role / Device Role / Timing Role: Dual Zener acts as passive bidirectional clamp between V_CC and GND, limiting voltage excursions without active control.

Use Value: Prevents MCU latch-up or reset by holding rail within 13.5 V during 100 ms surges, leveraging 2.5 A I_ZSM rating.

Use Scenario: Stabilizes analog output of pressure sensors exposed to ESD events in factory automation systems.

IC Role / Device Role / Timing Role: Provides low-leakage (≤0.1 µA) reference clamping at signal line endpoints to suppress ±8 kV contact discharge.

Use Value: Maintains signal integrity below 12.7 V with <150 Ω r_dif, ensuring ADC input stays within valid range during fast transients.

Automotive Body Control Module (BCM) LIN Bus Protection

Consumer Appliance Power Supply Feedback Regulation

Use Scenario: Shields LIN transceiver pins from induced noise and battery reversal events in door module wiring harnesses.

IC Role / Device Role / Timing Role: Common-anode topology allows symmetric clamping of LIN_H and LIN_L lines to V_BAT and GND simultaneously.

Use Value: Limits bus voltage swing to ±12.7 V using shared anode, reducing component count versus discrete Zener pairs.

Use Scenario: Sets feedback reference for optocoupler-based isolated flyback controllers in white goods power supplies.

IC Role / Device Role / Timing Role: Supplies stable 12 V reference to TL431 comparator input, improving output voltage accuracy under line/load variation.

Use Value: Achieves ±1 % output regulation via 11.4–12.7 V V_Z window and low tempco (±6.0 mV/K) across −25 °C to +85 °C.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZB84-B12,215	±2 % tolerance (vs. ±5 %), higher test current (5 mA), tighter V_Z spread (11.8–12.2 V)	Preferred for precision feedback loops requiring <1 % output error	Select when regulation accuracy outweighs cost sensitivity and thermal margin is ample
MMBZ5242B-7-F	Single Zener, 12 V, ±5 %, SOT23, but no dual configuration; 500 mW P_tot, higher r_dif (23 Ω typical)	Requires two devices for bidirectional clamping; lacks common-anode integration	Choose only if board layout permits discrete placement and thermal management supports higher P_tot

Compared with BZB84-C12,215, the BZB84-B12,215 offers tighter regulation at higher test current but reduces surge margin due to lower I_ZSM (2.0 A vs. 2.5 A); MMBZ5242B-7-F delivers higher continuous power but doubles component count and footprint for dual-clamp functionality.

Availability

BZB84-C12,215 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface circuits, and consumer appliance power supply feedback requiring stable component supply with AEC-Q101 compliance and SOT23 footprint consistency.

Supply support for BZB84-C12,215 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 logic, discrete, and MOSFET solutions, with deep expertise in automotive-qualified components.

The BZB84 series belongs to Nexperia's automotive-grade Zener portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh-temperature, high-vibration environments like powertrain and chassis control systems.

FAQ

What is the maximum non-repetitive surge current for BZB84-C12,215?

The device supports 2.5 A non-repetitive peak reverse current (I_ZSM) under standardized 100 µs square-wave pulse conditions at T_j = 25 °C. This rating applies per diode and assumes proper PCB thermal design - exceeding this value risks irreversible junction damage even if duration is shorter.

How does the common-anode configuration affect circuit implementation?

With Pin 3 as the shared anode, both Zener cathodes (Pins 1 and 2) must be connected to separate nodes needing clamping - e.g., one to V_CC, one to signal line - while Pin 3 connects to GND or reference plane. This eliminates need for two discrete anodes and simplifies routing in bidirectional protection schemes.

Is BZB84-C12,215 suitable for use in DC-DC converter feedback networks?

Yes - its 11.4–12.7 V Zener range, low 150 Ω differential resistance, and ±6.0 mV/K temperature coefficient make it viable for fixed-output flyback or buck converter feedback references. However, for adjustable outputs requiring precise ratio matching, dedicated voltage references remain preferable.

What is the thermal resistance from junction to solder point (R_th(j-sp)) for this device?

R_th(j-sp) is 100 K/W under standard mounting conditions (FR4 PCB, single-sided copper, tin-plated, soldering at Pins 1 and 2). This value enables accurate junction temperature estimation during surge events by measuring solder point temperature and applying ΔT = R_th(j-sp) × P_diss.

BZB84-C12,215 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:: Active

Configuration:: 1 Pair Common Anode

Voltage - Zener (Nom) (Vz):: 12 V

Tolerance:: ±5%

Power - Max:: 300 mW

Impedance (Max) (Zzt):: 25 Ohms

Current - Reverse Leakage @ Vr:: 100 nA @ 8 V

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

Operating Temperature:: -

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZB84-C12,215 FAQ

1.How can I place an order for BZB84-C12,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZB84-C12,215 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 BZB84-C12,215 reliable?

The price and inventory of BZB84-C12,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-C12,215 is usually 5 days.

3.What payment methods are accepted for BZB84-C12,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C12,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZB84-C12,215?

BZB84-C12,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZB84-C12,215 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 BZB84-C12,215?

For technical support, including BZB84-C12,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C12,215 requirements.

6.How does Aetrix verify that BZB84-C12,215 is sourced from the original manufacturer or authorized distributors?

All BZB84-C12,215 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 BZB84-C12,215 meets industry standards.

7.What is the process for return or replacement of BZB84-C12,215?

All BZB84-C12,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C12,215, 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 BZB84-C12,215 part is unused and in its original packaging.

Return procedure for BZB84-C12,215:

1.Submit a request within 90 days.

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

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