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Nexperia USA Inc. BZX84W-C8V2-QX
- Part No.:
- BZX84W-C8V2-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C8V2-QX.pdf
- Description:
- DIODE ZENER 8.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:9,385
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Product details
Overview
BZX84W-C8V2-QX from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 8.2 V nominal Zener voltage at IZ = 5 mA, with 80 Ω differential resistance, 4.6 mV/K temperature coefficient, and 150 °C maximum junction temperature. It delivers stable voltage reference in automotive power supply monitoring and ECU bias networks.
For engineers reviewing the BZX84W-C8V2-QX datasheet, BZX84W-C8V2-QX pinout, BZX84W-C8V2-QX application, or BZX84W-C8V2-QX equivalent, key selection criteria include Zener voltage tolerance, low reverse leakage (700 nA at VR = 5 V), AEC-Q101 qualification, thermal resistance (455 K/W), and SOT323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain precise DC voltage regulation under varying load and temperature conditions. Its 8.2 V nominal Zener voltage is specified at 5 mA test current, with ±5 % tolerance and 4.6 mV/K positive temperature coefficient ensuring predictable drift across −55 °C to +150 °C ambient range.
The device features 80 Ω differential resistance at 5 mA, enabling tight regulation under dynamic current changes, and exhibits only 700 nA reverse leakage at 5 V reverse bias-critical for low-power sensor biasing and standby-mode voltage references in automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal at IZ = 5 mA; ±5 % tolerance ensures predictable clamping in 12 V automotive rail monitoring. |
| Differential Resistance (rdif) | 80 Ω at IZ = 5 mA; maintains <±0.4 V output variation over ±10 mA load change. |
| Reverse Leakage (IR) | 700 nA at VR = 5 V; enables ultra-low quiescent current in always-on voltage reference circuits. |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; supports continuous regulation in compact ECU subsystems. |
| Temperature Coefficient (SZ) | +4.6 mV/K at IZ = 5 mA; provides stable 8.2 V reference across full automotive temperature range. |
| Junction Temperature (Tj) | 150 °C max; qualified for under-hood applications including engine control modules and body controllers. |
| AEC-Q101 Qualified | Yes; certified for automotive-grade reliability per stress test qualification for discrete semiconductors. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals: anode (Pin 1), not connected (Pin 2), cathode (Pin 3). Compact 2.2 mm × 1.35 mm footprint supports high-density routing in space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation; must be held ≤ VZ below cathode for Zener operation. |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node; defines regulated output voltage referenced to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified for use in engine control units, ADAS sensors, and infotainment power rails. |
| Low reverse leakage | 700 nA at 5 V reverse bias enables microamp-level standby current in always-on voltage monitors. |
| Precision Zener voltage | 8.2 V ±5 % tolerance with 4.6 mV/K tempco ensures stable reference across −40 °C to +125 °C operating range. |
| Thermal performance | 455 K/W junction-to-ambient thermal resistance on standard FR4 PCB allows reliable operation without heatsinking. |
| High-frequency stability | 4 pF diode capacitance at 1 MHz and 0 V bias minimizes phase shift in feedback loops of switching regulators. |
Applications
| Engine Control Unit (ECU) Reference | Infotainment Power Sequencing |
|---|---|
|
Use Scenario: Providing stable 8.2 V reference for analog comparators monitoring 12 V battery rail integrity in engine control modules. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precision threshold for undervoltage lockout (UVLO) detection. Use Value: 700 nA leakage and +4.6 mV/K tempco ensure UVLO trip point remains within ±25 mV over full automotive temperature range. |
Use Scenario: Biasing startup circuitry in infotainment system PMICs requiring clean 8.2 V enable signal before main LDO activation. IC Role / Device Role / Timing Role: Precision shunt regulator generating controlled enable voltage for sequenced power-up of SoC subsystems. Use Value: 80 Ω differential resistance limits enable voltage droop to <0.1 V during 5 mA sequencing current transients. |
| ADAS Camera Module Bias | Body Control Module (BCM) Sensor Interface |
|
Use Scenario: Supplying regulated bias to image sensor analog front-end in rear-view camera modules exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Low-leakage Zener reference stabilizing sensor gain calibration voltage against battery ripple and temperature drift. Use Value: AEC-Q101 qualification and 150 °C Tj rating ensure uninterrupted operation during sustained 105 °C ambient exposure. |
Use Scenario: Generating reference voltage for window lift motor current sensing amplifiers in body control modules. IC Role / Device Role / Timing Role: Shunt regulator defining common-mode input level for differential current sense op-amps. Use Value: 4 pF capacitance prevents high-frequency noise coupling into sensitive analog measurement paths at 100 kHz PWM motor drive frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-B8V2-Q | ±2 % tolerance (vs. ±5 %); 10 Ω lower rdif (70 Ω); identical VZ, package, and AEC-Q101 status. | Preferred where tighter voltage accuracy is required for precision ADC reference buffers. | Select when ±2 % tolerance justifies minor cost premium and tighter regulation is critical. |
| MMSZ5236B-TP | ±5 % tolerance; 9.1 V nominal VZ; SOD-123 package; not AEC-Q101 qualified; 100 nA IR at 7 V. | Suitable for non-automotive industrial power supplies where AEC-Q101 is not mandated. | Choose only for cost-sensitive consumer or industrial designs lacking automotive qualification requirements. |
Compared with BZX84W-C8V2-QX, the BZX84W-B8V2-Q offers tighter tolerance for precision applications, while MMSZ5236B-TP trades AEC-Q101 compliance and exact 8.2 V rating for lower cost and smaller leakage-but in non-automotive contexts only.
Availability
BZX84W-C8V2-QX is available at Aetrix Electronics and suitable for automotive ECU reference design, ADAS camera biasing, and BCM sensor interface circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84W-C8V2-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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The BZX84W-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for robust voltage regulation in automotive power management, sensor biasing, and safety-critical subsystems.
FAQ
What is the maximum reverse voltage this Zener can regulate continuously?
The BZX84W-C8V2-QX is rated for continuous Zener operation up to its nominal 8.2 V with ±5 % tolerance, meaning it regulates stably between 7.79 V and 8.61 V at IZ = 5 mA. Absolute maximum reverse voltage is not defined separately-the device is designed to operate in breakdown within its specified power limit of 275 mW at 25 °C ambient.
Is Pin 2 electrically functional or purely mechanical?
Pin 2 is explicitly marked "n.c." (not connected) in the official Nexperia datasheet and has no internal electrical connection. It serves only as a mechanical alignment aid during SMT placement and must remain unconnected on the PCB to prevent unintended parasitic effects or solder bridging.
How does its 455 K/W thermal resistance impact PCB layout?
With Rth(j-a) = 455 K/W on standard FR4 (single-sided copper), the junction temperature rises ~124 °C at full 275 mW dissipation. To stay within 150 °C Tj, keep ambient ≤26 °C or reduce power; adding thermal relief pads or copper pours lowers effective Rth and enables higher safe operating power.
Can this diode replace older BZX84-C8V2 variants in existing designs?
Yes-BZX84W-C8V2-QX is a direct drop-in replacement for legacy BZX84-C8V2 in SOT323 packages, offering identical electrical specs plus AEC-Q101 qualification, improved thermal resistance, and tighter process control. No layout or schematic changes are needed.
BZX84W-C8V2-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):
- 8.2 V
- Tolerance:
- ±6.1%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 700 nA @ 5 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-C8V2-QX FAQ
1.How can I place an order for BZX84W-C8V2-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C8V2-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-C8V2-QX reliable?
The price and inventory of BZX84W-C8V2-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-C8V2-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C8V2-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C8V2-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C8V2-QX?
BZX84W-C8V2-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C8V2-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-C8V2-QX?
For technical support, including BZX84W-C8V2-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C8V2-QX requirements.
6.How does Aetrix verify that BZX84W-C8V2-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C8V2-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-C8V2-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C8V2-QX?
All BZX84W-C8V2-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C8V2-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-C8V2-QX part is unused and in its original packaging.
Return procedure for BZX84W-C8V2-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C8V2-QX Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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SMAZ12-13-F
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