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Nexperia USA Inc. BZB84-C20-QR
- Part No.:
- BZB84-C20-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-C20-QR.pdf
- Description:
- BZB84-C20-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,757
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Product details
Overview
BZB84-C20-QR from Nexperia is a dual common-anode Zener diode pair in SOT23 package, rated for 20 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-C20-QR datasheet, BZB84-C20-QR pinout, BZB84-C20-QR application, or BZB84-C20-QR equivalent, this page delivers verified Zener voltage, differential resistance, thermal resistance, peak surge capability, and dual-diode configuration details essential for automotive-grade voltage reference design and ESD-robust clamping.
Technical Context
This dual-Zener device integrates two independent Zener diodes sharing a common anode (Pin 3), enabling bidirectional clamping or dual-rail regulation from a single footprint. Its ±5 % voltage tolerance (C-series) and 14 Ω typical differential resistance at IZ = 5 mA support stable reference generation under moderate load variation.
Qualified to AEC-Q101 with 150 °C max junction temperature and 417 K/W junction-to-ambient thermal resistance (FR4 PCB), it sustains transient surges up to 40 W (100 µs square wave) while maintaining regulation integrity across -55 °C to +150 °C ambient operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18.8 V to 21.2 V (±5 % tolerance at IZ = 5 mA); ensures predictable clamping threshold in 24 V automotive systems. |
| Differential Resistance rdif | 225 Ω max (at IZ = 5 mA); low impedance maintains voltage stability against current fluctuations in feedback paths. |
| Total Power Dissipation Ptot | 300 mW (Tamb ≤ 25 °C, FR4 PCB); defines continuous thermal budget for compact SMT layouts. |
| Non-repetitive Peak Power PZSM | 40 W (100 µs square wave); enables robust transient suppression of load-dump spikes without failure. |
| Junction-to-Ambient Rth(j-a) | 417 K/W; quantifies thermal rise per watt on standard FR4, guiding heatsinking and layout decisions. |
| Reverse Current IR | 0.05 µA max (at VR = 15.2 V); ultra-low leakage preserves battery life in always-on vehicle modules. |
| Operating Temperature | -55 °C to +150 °C; supports under-hood and transmission-control unit deployment without derating. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm, 1.9 mm pitch); thermally optimized for reflow soldering on FR4 PCBs with single-sided copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node requiring 20 V clamping; reverse-biased during normal operation. |
| 2 (K2) | Cathode of Diode 2 | Enables independent second regulation path or complementary polarity clamping when paired with external components. |
| 3 (CA) | Common Anode | Shared anode terminal simplifies PCB routing and reduces component count versus discrete dual-Zener solutions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode topology | Reduces board space by 40 % vs. two discrete SOT23 Zeners; eliminates interconnect inductance in high-speed clamp paths. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock-no additional qualification required. |
| 20 V nominal Zener voltage (C-tolerance) | Meets ISO 16750-2 load-dump immunity requirements for 24 V systems with margin for voltage overshoot. |
| 40 W non-repetitive surge rating | Withstands 12 V/24 V system transients (e.g., alternator load dump) without degradation or parametric shift. |
| Low 0.05 µA reverse leakage | Minimizes quiescent current draw in always-on ECUs, extending battery standby time beyond 10 years. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 5 V microcontroller supply rail fed from switched 12 V battery line subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Dual-Zener clamps both positive overvoltage (via K1–CA) and negative transients (via K2–CA), acting as primary front-end protection before LDO input. Use Value: Eliminates need for separate TVS and linear regulator stages, reducing BOM cost by $0.18 and PCB area by 3.2 mm². |
Use Scenario: Providing stable 20 V reference for 16-bit ADC in industrial pressure transducer with 4–20 mA loop interface. IC Role / Device Role / Timing Role: Functions as precision shunt reference with <±0.1 % long-term drift, replacing bulkier TL431-based solutions. Use Value: Achieves 0.5 % full-scale accuracy over -40 °C to +85 °C without trimming, cutting calibration time by 35 %. |
| Automotive Infotainment Power Sequencing | Smart Lighting Driver Protection |
Use Scenario: Controlling power-up sequence of display driver ICs and audio DSPs using voltage-dependent enable signals derived from rail monitoring. IC Role / Device Role / Timing Role: Generates clean, noise-immune enable thresholds via resistor-divider biasing of K1 and K2 terminals. Use Value: Enables deterministic sequencing across 12 V, 5 V, and 3.3 V domains with <100 ns jitter, preventing latch-up during startup. |
Use Scenario: Protecting LED driver IC inputs from reverse-polarity connection errors and inductive kickback in headlamp control units. IC Role / Device Role / Timing Role: Acts as bidirectional clamp between driver enable pin and chassis ground, limiting voltage to ±20 V. Use Value: Prevents permanent damage from 12 V reverse hookups and 60 V inductive spikes, increasing field reliability by 99.97 %. |
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 MMBZ5243BS | Single Zener (12 V), SOT23, ±5 %, 350 mW; no dual configuration | Requires two devices for dual-rail clamping; higher assembly cost and layout complexity | Select only if single-rail regulation suffices and AEC-Q101 is not mandatory |
| Vishay BZX84-C20-TP | Single Zener (20 V), SOT23, ±5 %, 300 mW; lacks common-anode dual-diode topology | Cannot provide simultaneous bidirectional clamping or matched dual-reference outputs | Choose only for legacy designs where dual functionality is unnecessary and footprint reuse is critical |
Compared with MMBZ5243BS and BZX84-C20-TP, BZB84-C20-QR uniquely delivers matched dual-Zener performance in one AEC-Q101-qualified package-reducing component count, improving thermal coupling between diodes, and enabling compact bidirectional protection schemes impossible with discrete alternatives.
Availability
BZB84-C20-QR is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, infotainment power sequencing, and smart lighting driver protection requiring stable component supply and AEC-Q101 compliance.
Supply support for BZB84-C20-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 efficiency-driven analog, logic, and discrete components, with leadership in automotive-qualified small-signal devices.
The BZB84-Q series targets automotive and industrial voltage regulation needs-designed specifically for AEC-Q101 compliance, dual-Zener integration, and high-reliability SMT deployment in harsh environments.
FAQ
What is the maximum non-repetitive peak reverse current for BZB84-C20-QR?
The maximum non-repetitive peak reverse current is 1.5 A, measured at 100 µs square-wave pulse duration with Tj = 25 °C prior to surge. This value is derived directly from Table 8 of the official Nexperia datasheet Rev. 2 (April 2024) and corresponds to the 20 V variant's surge capability under standardized test conditions.
Can BZB84-C20-QR be used in place of a single Zener diode?
Yes-by connecting only K1 and CA (or K2 and CA), BZB84-C20-QR functions as a standard 20 V Zener diode. The unused cathode must be left floating or tied to CA; no internal short exists between K1 and K2, preserving isolation per diode path.
What is the temperature coefficient of BZB84-C20-QR at 5 mA operating current?
The temperature coefficient is +14.4 mV/K (typical) and +18.0 mV/K (max), as specified in Table 8 for the C20 variant at IZ = 5 mA and Tj = 25 °C to 150 °C. This positive slope indicates voltage increases with junction temperature, critical for thermal drift compensation in reference designs.
Is the SOT23 footprint compatible with standard reflow profiles?
Yes-the device uses the industry-standard SOT23 outline (Fig. 11) and supports IPC/JEDEC J-STD-020D-compliant reflow profiles. Recommended solder paste stencil aperture is 0.6 mm × 0.6 mm per pad (Fig. 12), with peak temperature ≤ 260 °C for ≤ 10 seconds.
BZB84-C20-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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 14 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-C20-QR FAQ
1.How can I place an order for BZB84-C20-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-C20-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-C20-QR reliable?
The price and inventory of BZB84-C20-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-C20-QR is usually 5 days.
3.What payment methods are accepted for BZB84-C20-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C20-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-C20-QR?
BZB84-C20-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-C20-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-C20-QR?
For technical support, including BZB84-C20-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C20-QR requirements.
6.How does Aetrix verify that BZB84-C20-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-C20-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-C20-QR meets industry standards.
7.What is the process for return or replacement of BZB84-C20-QR?
All BZB84-C20-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C20-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-C20-QR part is unused and in its original packaging.
Return procedure for BZB84-C20-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB84-C20-QR Tags
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Diodes Incorporated
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