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Nexperia USA Inc. BZB84-B43-QR
- Part No.:
- BZB84-B43-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-B43-QR.pdf
- Description:
- BZB84-B43-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
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Product details
Overview
BZB84-B43-QR from Nexperia is a dual common-anode Zener diode in SOT23 package, providing precise 43 V voltage regulation with ±2 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive power rail stabilization and overvoltage clamping.
For engineers reviewing the BZB84-B43-QR datasheet, BZB84-B43-QR pinout, BZB84-B43-QR application, or BZB84-B43-QR equivalent, this device serves as a compact dual-Zener solution for redundant reference generation, bidirectional transient suppression, and dual-rail voltage monitoring in space-constrained automotive ECUs and industrial control modules.
Technical Context
This dual-Zener diode integrates two independent 43 V Zener elements sharing a common anode terminal (Pin 3), enabling symmetrical clamping or complementary reference configurations without external interconnects. Its differential resistance of 375 Ω at IZ = 2 mA ensures stable regulation under moderate load variation.
The device operates across −55 °C to +150 °C ambient temperature and exhibits a temperature coefficient of +0.05 mV/K, minimizing drift in engine bay or under-hood environments. Non-repetitive peak reverse current capability reaches 0.6 A (100 µs square wave), supporting surge immunity per ISO 7637-2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 42.1 V to 43.9 V at IZ = 2 mA - tight ±2 % tolerance enables accurate 43 V reference without trimming |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - supports continuous operation on standard FR4 PCB with single-sided copper |
| Differential Resistance | 375 Ω at IZ = 2 mA - low impedance maintains regulation stability against load current shifts |
| Reverse Current (IR) | < 0.05 µA at VR = 30.1 V - minimal leakage preserves battery-backed circuit integrity |
| Non-repetitive Peak Current | 0.6 A (100 µs, Tj = 25 °C) - handles ISO 7637-2 Pulse 1/2a transients without degradation |
| Junction Temperature | 150 °C maximum - rated for under-hood deployment in automotive power management systems |
| AEC-Q101 Qualified | Qualified for automotive discrete semiconductors - meets stress test requirements for vibration, temperature cycling, and HTRB |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads; JEDEC TO-236AB compliant outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node or transient path for first 43 V Zener element |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 43 V Zener - enables dual-rail referencing or back-to-back clamping |
| 3 (CA) | Common Anode | Shared anode node; ties both Zeners to ground or low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Eliminates need for external anode tie, reducing PCB area and parasitic inductance in high-speed clamp paths |
| ±2 % Zener tolerance (B-series) | Enables direct use in precision 43 V reference circuits without calibration or resistor trimming |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTSL, TC, and UHAST - suitable for ASIL-B supporting functions |
| 40 W non-repetitive peak power | Withstands 100 µs surges up to 43 V × 0.6 A without failure - exceeds ISO 16750-2 Level IV requirements |
| SOT23 footprint compatibility | Mounts using standard reflow profiles (J-STD-020); compatible with automated pick-and-place and AOI inspection |
Applications
| Automotive Engine Control Unit (ECU) Power Monitoring | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Real-time monitoring of 48 V auxiliary rail voltage in diesel ECU power supply. IC Role / Device Role / Timing Role: Dual-Zener provides redundant 43 V reference for ADC threshold detection and overvoltage flag generation. Use Value: Common-anode architecture allows simultaneous sampling of rail health and fault margin with single-component footprint. |
Use Scenario: Protecting 24 V analog input channel from field-wiring transients in factory automation PLC. IC Role / Device Role / Timing Role: Clamps positive surges above 43 V while sinking current into common ground plane via CA pin. Use Value: 0.6 A peak current rating absorbs 100 µs spikes per IEC 61000-4-5 without derating or parallel devices. |
| Automotive Body Control Module (BCM) CAN Bus Biasing | Medical Infusion Pump Voltage Reference |
Use Scenario: Providing stable bias voltage for CAN FD transceiver termination resistors in BCM sub-system. IC Role / Device Role / Timing Role: One Zener leg sets 43 V common-mode reference; second leg monitors supply integrity during sleep/wake transitions. Use Value: Dual-element integration eliminates matching drift between discrete Zeners, improving CAN bus common-mode rejection. |
Use Scenario: Generating isolated 43 V reference for high-precision DAC in infusion pump motor driver feedback loop. IC Role / Device Role / Timing Role: Acts as temperature-stable shunt reference with 0.05 mV/K coefficient, directly feeding op-amp reference input. Use Value: ±2 % initial tolerance and low thermal drift ensure dose accuracy within ±0.5 % over −25 °C to +70 °C operating range. |
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 |
|---|---|---|---|
| ON Semiconductor MMBZ5262BS | Single 43 V Zener in SOT-363; no common-anode dual configuration; ±5 % tolerance | Requires external anode tie for dual use; higher voltage drift limits precision reference use | Select when only one 43 V reference is needed and board space permits discrete layout |
| Vishay BZX84-C43-TP | Single Zener in SOT-23; ±5 % tolerance; no dual-element integration; not AEC-Q101 qualified | Lacks redundancy and automotive qualification; unsuitable for safety-critical ECU monitoring | Use only in cost-sensitive consumer applications where AEC compliance and dual functionality are unnecessary |
Compared with MMBZ5262BS and BZX84-C43-TP, BZB84-B43-QR uniquely delivers matched dual 43 V regulation in one AEC-Q101-qualified SOT23 package, enabling compact, reliable, and functionally redundant designs impossible with single-Zener alternatives.
Availability
BZB84-B43-QR is available at Aetrix Electronics and suitable for automotive ECU power monitoring, industrial PLC analog protection, medical infusion pump references, and CAN FD biasing requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZB84-B43-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 specializing in high-performance, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components and advanced packaging.
BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener portfolio, engineered specifically for robust voltage regulation and transient suppression in harsh automotive and industrial environments.
FAQ
What is the maximum continuous reverse current rating for BZB84-B43-QR?
The device has no specified continuous reverse current rating; it is designed for regulated Zener operation at IZ = 2 mA (typical test condition). Maximum DC power dissipation is limited to 300 mW at Tamb ≤ 25 °C, corresponding to ~7 mA average current at 43 V - sustained operation above this requires thermal derating per Rth(j-a) = 417 K/W.
Can BZB84-B43-QR be used in a back-to-back configuration for AC signal clamping?
No - the common-anode architecture (K1–CA–K2) prevents true back-to-back connection. To clamp both polarities, external diodes must be added in series with each cathode, or a dedicated bidirectional TVS like PESD5V0S1BA should be selected instead.
Is the 43 V Zener voltage specified at DC or pulsed conditions?
Zener voltage is characterized at DC IZ = 2 mA per Table 9; all electrical parameters in the Characteristics section assume steady-state DC bias unless otherwise noted (e.g., IZSM specifies 100 µs pulse conditions).
Does the SOT23 package support hand-soldering repair?
Yes - the SOT23 footprint is compatible with hot-air rework tools and fine-tip irons; recommended solder profile follows J-STD-020, with peak temperature ≤ 260 °C for ≤ 10 seconds. Pad layout matches Nexperia's Fig. 12 reflow footprint for optimal thermal transfer.
BZB84-B43-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:
- ±2%
- 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-B43-QR FAQ
1.How can I place an order for BZB84-B43-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-B43-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-B43-QR reliable?
The price and inventory of BZB84-B43-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-B43-QR is usually 5 days.
3.What payment methods are accepted for BZB84-B43-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-B43-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-B43-QR?
BZB84-B43-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-B43-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-B43-QR?
For technical support, including BZB84-B43-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-B43-QR requirements.
6.How does Aetrix verify that BZB84-B43-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-B43-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-B43-QR meets industry standards.
7.What is the process for return or replacement of BZB84-B43-QR?
All BZB84-B43-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-B43-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-B43-QR part is unused and in its original packaging.
Return procedure for BZB84-B43-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-B43-QR Tags
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