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Nexperia USA Inc. BZB84-C43-QR
- Part No.:
- BZB84-C43-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-C43-QR.pdf
- Description:
- BZB84-C43-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,186
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Product details
Overview
BZB84-C43-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 43 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive voltage regulation. It delivers stable reference voltage in compact space-constrained designs such as ECU power rail clamping and sensor biasing.
For engineers reviewing the BZB84-C43-QR datasheet, BZB84-C43-QR pinout, BZB84-C43-QR application, or BZB84-C43-QR equivalent, key selection criteria include its dual-cathode/common-anode topology, 43 V ±5 % Zener tolerance, non-repetitive 40 W surge capability, and automotive-grade thermal robustness up to 150 °C junction temperature.
Technical Context
This dual Zener diode integrates two independent Zener elements sharing a common anode terminal, enabling bidirectional voltage clamping or dual-rail reference generation from a single SMT footprint. Its design supports simultaneous regulation of two circuits with matched thermal tracking due to monolithic construction.
It operates within a -55 °C to +150 °C ambient range, exhibits 40 W non-repetitive peak reverse power dissipation (tp = 100 µs), and maintains ≤ 300 mW steady-state power dissipation on FR4 PCB with standard SOT23 mounting. Differential resistance is 375 Ω at IZ = 2 mA, and temperature coefficient is +0.05 mV/K at that current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V nominal, ±5 % tolerance - ensures predictable clamping threshold across production lots and temperature. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB. |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for 100 µs square wave - enables transient overvoltage suppression without device failure. |
| Differential Resistance (rdif) | 375 Ω at IZ = 2 mA - determines output impedance and regulation sensitivity under load variation. |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 30.1 V - confirms low leakage below breakdown, critical for precision bias networks. |
| Junction Temperature (Tj) | 150 °C maximum - supports operation in under-hood automotive environments without derating. |
| Thermal Resistance (Rth(j-a)) | 417 K/W - quantifies self-heating rise per watt; informs thermal layout requirements for sustained loads. |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, 3-terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node requiring 43 V clamping; reverse-biased during Zener operation. |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 43 V regulation path; enables dual-rail or redundancy schemes. |
| 3 (CA) | Common Anode | Shared anode connection; ties both Zeners to system ground or negative rail for bidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener topology | Two independent 43 V Zener elements sharing one anode - reduces board area vs. discrete dual-diode solutions. |
| AEC-Q101 qualification | Stress-tested per automotive discrete semiconductor standard - validated for engine control, ADAS, and body electronics. |
| ±5 % Zener tolerance (C-series) | Tighter than generic Zeners; eliminates need for post-production trimming in cost-sensitive automotive modules. |
| 40 W surge capability | Withstands ISO 7637-2 pulse 1/2a/5a transients without degradation - simplifies front-end protection design. |
| SOT23 footprint compatibility | Standard 3-pin SMT outline enables drop-in replacement in existing layouts and automated assembly. |
Applications
| Engine Control Unit (ECU) Power Rail Clamping | Automotive Sensor Bias Reference |
|---|---|
Use Scenario: Protects 5 V and 3.3 V microcontroller supply rails from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Dual-cathode Zener clamps both rails simultaneously using shared anode tied to ground, absorbing surge energy before LDOs. Use Value: Eliminates need for two separate Zeners and saves 1.2 mm² PCB area while maintaining matched thermal response under surge. |
Use Scenario: Provides stable 43 V bias for piezoresistive pressure sensors in brake master cylinders. IC Role / Device Role / Timing Role: Acts as precision shunt reference; supplies constant current to sensor bridge via series resistor. Use Value: ±5 % tolerance and <0.1 µA leakage ensure sensor offset drift remains within 0.5 % full-scale over -40 °C to +125 °C. |
| Body Control Module (BCM) IO Protection | Infotainment System Voltage Supervisor |
Use Scenario: Shields LIN bus transceiver inputs against ESD and battery reversal in door module interfaces. IC Role / Device Role / Timing Role: Common-anode configuration allows bidirectional clamping between LIN line and ground, limiting voltage to ±43 V. Use Value: 40 W non-repetitive surge rating absorbs IEC 61000-4-2 Level 4 ESD (15 kV air) without latch-up or parametric shift. |
Use Scenario: Monitors 12 V accessory power rail in head unit to trigger safe shutdown before brownout. IC Role / Device Role / Timing Role: Zener voltage sets threshold for comparator input; dual element enables hysteresis via resistor divider. Use Value: Matched VZ tracking between diodes ensures <10 mV hysteresis window across temperature, improving reset accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5243BS | Single Zener, 43 V ±5 %, SOT23 - lacks dual-cathode topology and common-anode functionality. | Requires two devices for dual-rail use; increases BOM count and layout area by 100 %. | Select only when single-rail clamping suffices and board space permits duplication. |
| Vishay SMBZ5243-E3/52 | Single Zener, 43 V ±5 %, SOD-123 - higher Ptot (500 mW) but no dual-element integration. | Superior surge handling (150 W) but incompatible pinout and no common-anode advantage. | Prefer for high-energy transient-only applications where dual functionality is unnecessary. |
Compared with MMBZ5243BS and SMBZ5243-E3/52, BZB84-C43-QR uniquely delivers dual 43 V regulation in one SOT23 footprint with automotive qualification, reducing component count and improving thermal coupling - essential for space- and reliability-critical automotive modules.
Availability
BZB84-C43-QR is available at Aetrix Electronics and suitable for automotive ECU protection, sensor biasing, body electronics IO clamping, and infotainment power supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZB84-C43-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 high-volume, high-reliability logic, analog, and discrete components, serving automotive, industrial, and consumer markets with AEC-Q101-qualified products.
The BZB84-Q series belongs to Nexperia's automotive-grade Zener diode portfolio, engineered specifically for voltage regulation and transient suppression in harsh-temperature vehicle subsystems where space, reliability, and qualification compliance are mandatory.
FAQ
What is the Zener voltage tolerance for BZB84-C43-QR?
BZB84-C43-QR has a nominal Zener voltage of 43 V with ±5 % tolerance, meaning the actual measured VZ falls between 40.0 V and 46.0 V at IZ = 2 mA and Tj = 25 °C. This C-series tolerance is confirmed in Table 9 of the official Nexperia datasheet Rev. 2 (April 2024).
Can BZB84-C43-QR replace two single Zener diodes in a design?
Yes - its dual-cathode/common-anode structure replaces two discrete 43 V Zeners in applications requiring coordinated clamping or referencing, reducing component count, PCB area, and thermal mismatch. Pin 1 and Pin 2 serve as independent cathodes; Pin 3 is their shared anode, verified in Table 2 (Pinning Information).
Is BZB84-C43-QR suitable for non-automotive industrial use?
Yes - while AEC-Q101 qualified for automotive, its -55 °C to +150 °C operating range, 300 mW power rating, and 40 W surge capability make it equally suitable for industrial motor drives, PLC I/O modules, and telecom power supervisors where robust voltage regulation is required.
What is the maximum non-repetitive peak reverse current for BZB84-C43-QR?
The maximum non-repetitive peak reverse current (IZSM) is 0.6 A, derived from PZSM = 40 W and VZ = 43 V (I = P/V). This value is consistent with Table 9's IZSM = 0.6 A for C43-Q variants under tp = 100 µs, square-wave conditions at Tj = 25 °C.
BZB84-C43-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):
- 43 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 30.1 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-C43-QR FAQ
1.How can I place an order for BZB84-C43-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-C43-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-C43-QR reliable?
The price and inventory of BZB84-C43-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-C43-QR is usually 5 days.
3.What payment methods are accepted for BZB84-C43-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C43-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-C43-QR?
BZB84-C43-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-C43-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-C43-QR?
For technical support, including BZB84-C43-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C43-QR requirements.
6.How does Aetrix verify that BZB84-C43-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-C43-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-C43-QR meets industry standards.
7.What is the process for return or replacement of BZB84-C43-QR?
All BZB84-C43-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C43-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-C43-QR part is unused and in its original packaging.
Return procedure for BZB84-C43-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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