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Nexperia USA Inc. BZB84-C39-QR
- Part No.:
- BZB84-C39-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-C39-QR.pdf
- Description:
- BZB84-C39-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,351
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Product details
Overview
BZB84-C39-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 39 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification-used for precision voltage regulation and overvoltage protection in automotive power rails and sensor interface circuits.
For engineers reviewing the BZB84-C39-QR datasheet, BZB84-C39-QR pinout, BZB84-C39-QR application, or BZB84-C39-QR equivalent, key selection criteria include its dual-common-anode topology, 39 V ±5 % Zener voltage at IZ = 2 mA, non-repetitive peak reverse current of 0.7 A, differential resistance ≤350 Ω, and automotive-grade thermal reliability up to 150 °C junction temperature.
Technical Context
This dual Zener diode integrates two independent 39 V Zener elements sharing a common anode terminal (Pin 3), enabling compact dual-rail clamping or complementary reference generation. Its design supports bidirectional voltage stabilization with matched thermal coefficients and low capacitance (45 pF at 1 MHz, VR = 0 V).
Rated for operation from −55 °C to +150 °C ambient, it delivers stable regulation under transient surges up to 40 W (100 µs square wave) and maintains <0.9 V forward voltage at 10 mA-critical for low-loss biasing in automotive microcontroller supply monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 37.0 V to 41.0 V at IZ = 2 mA - ensures ±5 % regulation accuracy across production lots and temperature range. |
| Differential Resistance rdif | ≤350 Ω at IZ = 2 mA - minimizes output voltage shift under load variation in feedback or clamp applications. |
| Reverse Current IR | ≤0.05 µA at VR = 29.3 V - guarantees low leakage during standby, preserving battery-backed system integrity. |
| Non-repetitive Peak Reverse Current IZSM | 0.7 A (100 µs, Tj = 25 °C) - enables robust ESD/surge suppression without latch-up in 12 V automotive domains. |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on FR4 PCB - defines continuous thermal budget for surface-mount layout with standard copper footprint. |
| Junction Temperature Tj | −55 °C to +150 °C - supports under-hood deployment in engine control units and ADAS domain controllers. |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch, tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node 1; reverse-biased during Zener operation to clamp or reference at 39 V. |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second 39 V rail-enables dual-sensor biasing or redundant voltage monitoring. |
| 3 (CA) | Common Anode | Shared anode connection; ties both diodes to system ground or negative rail for bidirectional clamping topology. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Enables space-efficient dual-rail voltage clamping or mirrored reference generation without discrete component duplication. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock-reducing qualification effort for Tier-1 suppliers. |
| ±5 % Zener voltage tolerance (C-series) | Meets cost-sensitive automotive subsystem requirements where tight regulation is secondary to reliability and consistency. |
| Low diode capacitance (45 pF) | Preserves signal integrity in high-frequency sensor interfaces (e.g., CAN transceiver bias networks) without parasitic loading. |
| Thermal resistance Rth(j-a) = 417 K/W | Supports thermal-aware PCB layout with single-sided copper; enables >200 mA pulsed operation within safe SOA limits. |
Applications
| Automotive Power Rail Clamp | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping 12 V battery-supplied MCU VDD rail against load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Dual Zener acts as bidirectional overvoltage protector-common anode grounded, cathodes tied to rail and reset line. Use Value: Prevents MCU brownout or latch-up during ISO 7637-2 Pulse 5a events while occupying one SOT23 footprint. |
Use Scenario: Generating a precise 39 V reference for external watchdog timer enable threshold. IC Role / Device Role / Timing Role: Zener diode provides stable voltage threshold triggering reset assertion when supply drops below 39 V × 0.9. Use Value: Eliminates need for external voltage divider and comparator; reduces BOM count and improves long-term drift stability. |
| Engine Control Unit Sensor Bias | ADAS Camera Module Protection |
Use Scenario: Biasing dual analog sensors (e.g., knock and MAP) requiring matched 39 V excitation in harsh under-hood environment. IC Role / Device Role / Timing Role: Common-anode configuration supplies identical regulated voltage to two sensor bridges via separate cathodes. Use Value: Ensures sensor output correlation and eliminates inter-channel offset caused by discrete regulator mismatch. |
Use Scenario: Protecting 3.3 V image sensor I/O lines from ESD and cable discharge events in rear-view camera harnesses. IC Role / Device Role / Timing Role: One Zener leg clamps data line to 39 V rail; other leg clamps supply rail-both referenced to common ground. Use Value: Achieves IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) protection with sub-10 ns response and no signal distortion. |
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 MMBZ5240BLT1G | Single 10 V Zener, SOT23, ±5 %, 350 mW - lacks dual configuration and 39 V rating. | Only suitable for single-rail 10 V reference; cannot replace dual-clamp function without redesign. | Select only if redesigning for lower-voltage single-rail use and accepting increased board area. |
| Vishay BZX84-C39-TP | Single 39 V Zener, SOT23, ±5 %, 300 mW - no common-anode dual-diode structure. | Requires two devices and extra routing to replicate dual-cathode functionality; increases assembly cost. | Choose only when dual-cathode topology is unnecessary and board space permits discrete duplication. |
Compared with MMBZ5240BLT1G and BZX84-C39-TP, BZB84-C39-QR uniquely delivers matched dual 39 V regulation in one footprint-reducing component count, improving thermal tracking, and simplifying layout for automotive dual-sensor or redundant power monitoring systems.
Availability
BZB84-C39-QR is available at Aetrix Electronics and suitable for automotive power rail clamping, microcontroller reset supervision, and engine control unit sensor biasing requiring stable component supply with AEC-Q101 compliance and extended temperature support.
Supply support for BZB84-C39-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, discrete, and MOSFET solutions-originally part of Philips and now an independent Dutch company serving automotive, industrial, and consumer markets.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, transient suppression, and reference generation where space, thermal resilience, and qualification rigor are mandatory.
FAQ
What is the maximum non-repetitive peak reverse power dissipation for BZB84-C39-QR?
The device supports 40 W non-repetitive peak reverse power dissipation at Tj = 25 °C with 100 µs square-wave pulse duration. This rating enables robust surge handling in automotive load-dump scenarios but must not be exceeded continuously or repetitively without derating per Figure 1 in the datasheet.
How does the common-anode configuration affect circuit implementation?
With Pin 3 as shared anode, both Zener diodes conduct when their respective cathodes (Pins 1 and 2) are driven negative relative to ground. This allows simultaneous clamping of two nodes to the same reference or creation of a differential clamp pair-ideal for dual-sensor bias or redundant monitoring paths.
Is BZB84-C39-QR suitable for use in 24 V commercial vehicle systems?
Yes-its 39 V Zener voltage provides sufficient margin above 24 V nominal systems (including transients up to 35 V), and its −55 °C to +150 °C operating range meets commercial vehicle under-hood requirements. AEC-Q101 qualification further validates suitability for heavy-duty cyclic stress environments.
What is the typical Zener impedance at 2 mA for this part?
The differential resistance is ≤350 Ω at IZ = 2 mA, measured per Table 9. This value reflects dynamic impedance under regulation conditions and directly impacts output voltage stability during current fluctuations in reference or clamp applications.
BZB84-C39-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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 130 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 27.3 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-C39-QR FAQ
1.How can I place an order for BZB84-C39-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-C39-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-C39-QR reliable?
The price and inventory of BZB84-C39-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-C39-QR is usually 5 days.
3.What payment methods are accepted for BZB84-C39-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C39-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-C39-QR?
BZB84-C39-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-C39-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-C39-QR?
For technical support, including BZB84-C39-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C39-QR requirements.
6.How does Aetrix verify that BZB84-C39-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-C39-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-C39-QR meets industry standards.
7.What is the process for return or replacement of BZB84-C39-QR?
All BZB84-C39-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C39-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-C39-QR part is unused and in its original packaging.
Return procedure for BZB84-C39-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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