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Nexperia USA Inc. BZX84W-B5V6-QX
- Part No.:
- BZX84W-B5V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-B5V6-QX.pdf
- Description:
- DIODE ZENER 5.6V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,688
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Product details
Overview
BZX84W-B5V6-QX from Nexperia is a ±2% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 5.6 V nominal regulation at 5 mA, with 400 Ω differential resistance and 1.2 mV/K temperature coefficient, used for precision voltage reference and overvoltage protection in automotive power rails.
For engineers reviewing the BZX84W-B5V6-QX datasheet, BZX84W-B5V6-QX pinout, BZX84W-B5V6-QX application, or BZX84W-B5V6-QX equivalent, this page delivers verified Zener parameters, AEC-Q101 qualification status, thermal resistance (455 K/W), reverse leakage (1 µA at 2 V), and SOT323 terminal mapping for layout and reliability validation.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 5.6 V output across load and line variations, with low dynamic impedance enabling tight regulation under transient conditions. Its ±2% tolerance ensures predictable clamping thresholds in safety-critical automotive circuits.
Qualified per AEC-Q101, it supports operation from −55 °C to +150 °C ambient and withstands non-repetitive surge currents up to 1.2 A (at 100 µs pulse), making it suitable for ESD and load-dump suppression in 12 V vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V at IZ = 5 mA - defines precise regulation point for reference and clamp circuits |
| Tolerance | ±2% (B-series) - enables tighter voltage margin control than ±5% C-series variants |
| Differential Resistance | 400 Ω max at IZ = 5 mA - determines regulation stiffness against current variation |
| Reverse Leakage Current | 1 µA max at VR = 2 V - ensures minimal quiescent power loss in standby mode |
| Total Power Dissipation | 275 mW at Tamb = 25 °C on FR4 PCB - sets maximum continuous DC power handling |
| Temperature Coefficient | +1.2 mV/K at IZ = 5 mA - indicates positive drift, critical for thermal stability in engine bay environments |
| Junction Temperature Limit | 150 °C - defines absolute thermal ceiling for reliable long-term operation |
Pinout & Package
SOT323 (SC-70) plastic surface-mounted package with 3 leads; ultra-compact footprint (2.2 mm × 1.35 mm × 0.95 mm) optimized for high-density automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side in regulation configuration |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected in layout |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential side for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity, and mechanical shock |
| Low thermal resistance | 455 K/W junction-to-ambient enables stable operation without heatsinking in confined spaces |
| Controlled temperature coefficient | +1.2 mV/K allows predictable voltage shift over −40 °C to +125 °C operating range |
| High surge capability | Withstands 40 W non-repetitive peak reverse power (100 µs pulse) for transient suppression |
| Small-outline packaging | SOT323 footprint reduces board area by >50% vs. DO-35 or SOD-123 alternatives |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Rail Clamp |
|---|---|
Use Scenario: Provides stable 5.6 V reference for ADC biasing and sensor signal conditioning in engine management systems. IC Role / Device Role / Timing Role: Precision Zener reference diode maintaining voltage accuracy under wide temperature and load swings. Use Value: ±2% tolerance and +1.2 mV/K TC ensure <±30 mV total drift over −40 °C to +125 °C, meeting ASIL-B functional safety margins. | Use Scenario: Clamps 12 V supply rail transients during hot-swap events in head unit power distribution networks. IC Role / Device Role / Timing Role: Overvoltage protection device absorbing short-duration surges via controlled reverse breakdown. Use Value: 40 W non-repetitive surge rating (100 µs) suppresses ISO 7637-2 Pulse 1/2a transients without degradation. |
| Body Control Module (BCM) Voltage Monitor | ADAS Camera Power Conditioning |
Use Scenario: Monitors battery voltage integrity in door module microcontroller reset circuitry. IC Role / Device Role / Timing Role: Zener-based threshold detector triggering brown-out reset when supply drops below 5.6 V. Use Value: 1 µA reverse leakage at 2 V ensures negligible current draw in always-on monitoring state. | Use Scenario: Stabilizes 3.3 V LDO input rail in surround-view camera ECU exposed to engine compartment heat. IC Role / Device Role / Timing Role: Pre-regulator shunt element reducing ripple and noise before low-noise LDO stage. Use Value: 400 Ω differential resistance minimizes output impedance variation across 1–10 mA load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C5V6-Q | ±5% tolerance (vs. ±2%), identical package and thermal specs | Acceptable where looser voltage margin suffices, e.g., non-critical biasing | Select for cost-sensitive non-safety applications where 5.3–5.9 V range is acceptable |
| MMSZ5232BS-7-F | ±5% tolerance, SOD-323 package, 500 mW Ptot, 300 Ω rdif | Higher power rating but larger footprint; not AEC-Q101 qualified | Choose only for industrial designs requiring higher dissipation and no automotive qualification |
Compared with BZX84W-B5V6-QX, the BZX84W-C5V6-Q trades regulation precision for lower cost in non-critical roles, while MMSZ5232BS-7-F offers higher power but lacks automotive qualification and increases PCB area-making the BZX84W-B5V6-QX optimal for space-constrained, safety-compliant automotive voltage references.
Availability
BZX84W-B5V6-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, infotainment power rail protection, and ADAS camera power conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84W-B5V6-QX 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, reliable discrete and logic devices for automotive, industrial, and consumer markets.
The BZX84W-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 maximum continuous reverse current the BZX84W-B5V6-QX can sustain at 25 °C?
The device is rated for 200 mA maximum forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 25 °C ambient on FR4 PCB, 275 mW total power dissipation allows ~49 mA continuous reverse current (275 mW ÷ 5.6 V), assuming full Zener conduction without derating.
Does the n.c. pin (Pin 2) require grounding or floating in PCB layout?
Pin 2 is internally not connected and must remain electrically floating-no trace, pad, or solder mask opening should connect to it. Grounding or routing to any net risks internal shorting or parametric shift due to parasitic coupling in the SOT323 mold compound.
How does the +1.2 mV/K temperature coefficient affect regulation accuracy over temperature?
At +1.2 mV/K, the Zener voltage increases by 1.2 mV per Kelvin rise. From 25 °C to 125 °C (ΔT = 100 K), voltage shifts +120 mV-resulting in 5.72 V at 125 °C. Combined with ±2% initial tolerance, total deviation remains within ±3.4% across the full automotive range.
Can BZX84W-B5V6-QX replace older BZX84-C5V6 in existing designs?
Yes, with caveats: both share SOT23 footprint, but BZX84W-B5V6-QX uses SOT323 (smaller), requires updated land pattern. Electrically, it offers tighter tolerance (±2% vs ±5%) and AEC-Q101 qualification-ideal for upgrading legacy automotive designs needing improved accuracy and reliability.
BZX84W-B5V6-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±1.96%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 2 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:
- SOT-323
BZX84W-B5V6-QX FAQ
1.How can I place an order for BZX84W-B5V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-B5V6-QX 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 BZX84W-B5V6-QX reliable?
The price and inventory of BZX84W-B5V6-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-B5V6-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-B5V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-B5V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-B5V6-QX?
BZX84W-B5V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-B5V6-QX 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 BZX84W-B5V6-QX?
For technical support, including BZX84W-B5V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-B5V6-QX requirements.
6.How does Aetrix verify that BZX84W-B5V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-B5V6-QX 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 BZX84W-B5V6-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-B5V6-QX?
All BZX84W-B5V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-B5V6-QX, 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 BZX84W-B5V6-QX part is unused and in its original packaging.
Return procedure for BZX84W-B5V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-B5V6-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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