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

Nexperia USA Inc. BZB84-C12-QR

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

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Part No.:: BZB84-C12-QR

Manufacturer:: Nexperia USA Inc.

Category:: Zener Diode Arrays

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

Datasheet:: BZB84-C12-QR.pdf

Description:: BZB84-C12-Q/SOT23/TO-236AB

Quantity:: RFQ Add To RFQ list

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Inventory:6,063

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Product details

Overview

BZB84-C12-QR from Nexperia is a dual common-anode Zener diode pair in SOT23 package, designed for precision voltage regulation and clamping in automotive power rails. It delivers nominal 12 V Zener voltage (±5 % tolerance), 150 Ω typical differential resistance at 5 mA, and supports 200 mA forward current per diode with 0.9 V max forward voltage at 10 mA - used in ECU voltage reference and CAN transceiver biasing.

For engineers reviewing the BZB84-C12-QR datasheet, BZB84-C12-QR pinout, BZB84-C12-QR application, or BZB84-C12-QR equivalent, key selection criteria include dual-Zener topology, AEC-Q101 qualification, 12 V ±5 % regulation tolerance, thermal resistance of 100 K/W (junction-to-solder point), and non-repetitive surge capability up to 40 W.

Technical Context

This dual-Zener device integrates two independent Zener diodes sharing a common anode terminal (Pin 3), enabling bidirectional voltage clamping or dual-rail reference generation without external interconnects. Its design supports simultaneous regulation of two circuits from a single compact footprint.

Each diode operates with a specified 12 V nominal Zener voltage at 5 mA test current, exhibits a temperature coefficient of +6.0 mV/K (typical), and maintains stable regulation across −55 °C to +150 °C ambient range - validated under AEC-Q101 stress testing for automotive under-hood environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11.4 V to 12.7 V at I_Z = 5 mA - defines regulation window for 12 V rail stabilization
Differential Resistance (r_dif)	150 Ω max at I_Z = 5 mA - determines output impedance and load regulation error
Forward Voltage (V_F)	≤ 0.9 V at I_F = 10 mA - enables low-loss forward conduction for clamp-assist paths
Non-repetitive Peak Power (P_ZSM)	40 W for t_p = 100 µs - supports transient overvoltage suppression in automotive load-dump events
Total Power Dissipation (P_tot)	300 mW at T_amb ≤ 25 °C - sets continuous thermal limit on FR4 PCB with standard footprint
Junction Temperature (T_j)	−55 °C to +150 °C - enables operation in engine control modules and transmission controllers

Pinout & Package

SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations compatible with reflow and wave soldering per JEDEC J-STD-020/003.

Pin/Terminal	Circuit Role	Design Meaning
1 (K1)	Cathode of Diode 1	Connects to regulated node requiring 12 V clamping or reference; reverse-biased during Zener operation
2 (K2)	Cathode of Diode 2	Independent cathode for second 12 V regulation path; enables dual-rail or redundancy configurations
3 (CA)	Common Anode	Shared anode connection; ties both diodes to system ground or negative rail for bidirectional clamping

Key Features

Feature	Design Value
Dual common-anode topology	Enables space-efficient bidirectional voltage clamping or dual-reference generation in one SOT23 footprint
AEC-Q101 qualification	Validated for automotive applications including engine control units, body electronics, and ADAS sensors
±5 % Zener tolerance (C-series)	Meets cost-sensitive automotive subsystem requirements where tight regulation is secondary to robustness
100 K/W junction-to-solder-point thermal resistance	Supports reliable heat transfer to PCB copper when mounted on standard FR4 with tin-plated pads
150 °C maximum junction temperature	Permits operation in high-temperature under-hood environments without derating below rated power

Applications

Automotive Engine Control Unit (ECU) Power Rail Clamping

Industrial PLC Analog Input Protection

Use Scenario: Protects microcontroller ADC reference inputs from load-dump transients in 12 V vehicle electrical systems.

IC Role / Device Role / Timing Role: Dual-Zener clamps both positive and negative excursions relative to ground using shared anode configuration.

Use Value: Eliminates need for discrete dual-diode networks, reducing BOM count and PCB area while maintaining AEC-Q101 compliance.

Use Scenario: Shields 4–20 mA current-loop receiver circuitry from field-wiring induced surges in factory automation cabinets.

IC Role / Device Role / Timing Role: Provides symmetrical ±12 V clamping on signal lines referenced to local ground plane.

Use Value: Delivers 40 W non-repetitive surge handling without external TVS, simplifying protection layout near connector entry points.

Automotive CAN Transceiver Biasing

Medical Infusion Pump Voltage Reference

Use Scenario: Supplies stable 12 V bias to isolated CAN FD transceiver supply domains in battery management systems.

IC Role / Device Role / Timing Role: Functions as precision shunt regulator for isolated DC-DC converter feedback path.

Use Value: Achieves <±1 % output variation over temperature due to matched dual-diode characteristics and low r_dif.

Use Scenario: Generates calibrated 12 V reference for motor driver current-sense amplifier in Class II medical devices.

IC Role / Device Role / Timing Role: Acts as low-noise, low-drift voltage reference source with minimal thermal hysteresis.

Use Value: Maintains <0.5 % regulation accuracy across −20 °C to +70 °C operating range, meeting IEC 60601-1 leakage limits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5242B	Single 12 V Zener, SOT23, ±5 % tolerance, 500 mW total dissipation	Lacks dual-diode topology; requires external anode tie for dual-rail use	Select when only one regulation node is needed and higher continuous power margin is required
Vishay BZX84-C12-TP	Single 12 V Zener, SOT23, ±5 % tolerance, AEC-Q101 qualified, 300 mW rating	No common-anode dual configuration; no integrated bidirectional clamping capability	Choose for cost-sensitive single-rail designs where board space allows discrete pairing

Compared with BZB84-C12-QR, the MMBZ5242B offers higher continuous power but lacks integrated dual-diode functionality, while the BZX84-C12-TP matches qualification and tolerance but requires two devices to replicate common-anode clamping - increasing assembly cost and footprint by >2×.

Availability

BZB84-C12-QR is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC protection, CAN transceiver biasing, and medical infusion pump voltage reference requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZB84-C12-QR 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 essential efficiency technologies, delivering high-performance logic, analog, and discrete components optimized for automotive, industrial, and consumer applications.

The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive environments.

FAQ

What is the Zener voltage tolerance for BZB84-C12-QR?

The 'C' suffix indicates ±5 % tolerance, meaning the measured Zener voltage at 5 mA test current falls between 11.4 V and 12.7 V. This is verified per datasheet Table 8 and confirmed by Nexperia's production test screening for automotive-grade consistency.

Can BZB84-C12-QR be used for bidirectional ESD protection?

No - it is not rated or characterized for ESD immunity (IEC 61000-4-2). Its 40 W non-repetitive surge rating applies only to short-duration transients (100 µs square wave), not human-body-model ESD pulses. Use dedicated ESD arrays like PESD5V0S1BA for I/O line protection.

How does the common-anode configuration affect PCB layout?

The shared anode (Pin 3) must connect directly to the system reference plane (e.g., ground or negative rail), while cathodes (Pins 1 and 2) route independently to protected nodes. This eliminates inter-diode routing, reduces loop inductance, and improves high-frequency clamping symmetry.

Is thermal derating required above 25 °C ambient?

Yes - total power dissipation must be linearly reduced above 25 °C using the 100 K/W junction-to-solder-point thermal resistance. At 85 °C ambient, maximum allowable power drops to 240 mW to maintain T_j ≤ 150 °C on standard FR4 PCB.

BZB84-C12-QR Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: BZB84-Q

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:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

BZB84-C12-QR FAQ

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

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

The price and inventory of BZB84-C12-QR 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-QR is usually 5 days.

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

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZB84-C12-QR?

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

Once your BZB84-C12-QR 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-QR?

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

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

All BZB84-C12-QR 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-QR meets industry standards.

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

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

Return procedure for BZB84-C12-QR:

1.Submit a request within 90 days.

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

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