My Inquiry
My Account
Nexperia USA Inc. BZX84W-C16-QX
- Part No.:
- BZX84W-C16-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C16-QX.pdf
- Description:
- DIODE ZENER 16.2V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:8,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84W-C16-QX from Nexperia is a ±5% tolerance Zener diode with 16 V nominal regulation voltage, 200 mA maximum forward current, and 275 mW total power dissipation in SOT323 (SC-70) package; used for precision voltage reference and overvoltage clamping in automotive power supply rails.
For engineers reviewing the BZX84W-C16-QX datasheet, BZX84W-C16-QX pinout, BZX84W-C16-QX application, or BZX84W-C16-QX equivalent, this page delivers verified Zener voltage, thermal resistance, differential resistance, reverse leakage, and AEC-Q101 qualification status - critical for automotive ECU and ADAS sensor power rail design.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown at precisely 16 V (±5%) under 5 mA test current, with 200 Ω typical differential resistance and +12.4 mV/K temperature coefficient. It maintains stable regulation across −55 °C to +150 °C ambient range.
Designed for surface-mount reflow assembly on FR4 PCBs, it delivers 455 K/W junction-to-ambient thermal resistance and supports non-repetitive surge pulses up to 40 W (100 µs), enabling robust transient suppression in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V nominal, ±5% tolerance at IZ = 5 mA - defines precise clamping threshold for 12 V system overvoltage protection |
| Differential Resistance (rdiff) | 200 Ω max at IZ = 5 mA - ensures minimal output voltage shift under load variation in reference circuits |
| Reverse Leakage (IR) | 50 nA max at VR = 11.2 V - guarantees low standby current in always-on automotive modules |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB - sets continuous thermal limit for compact SOT323 layout |
| Junction Temperature (Tj) | 150 °C max - enables operation in engine bay and under-hood environments without derating |
| Thermal Resistance (Rth(j-a)) | 455 K/W - quantifies self-heating rise per watt, critical for thermal margin calculation in sealed enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing per AEC standard |
Pinout & Package
Package: SOT323 (SC-70), leadless surface-mount plastic package with 3 terminals; footprint dimensions per Fig. 9 (reflow) and Fig. 10 (wave); JEDEC-compliant outline per Fig. 8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node during regulation; must be routed with low-inductance trace for high-frequency stability |
| 2 | Not Connected (n.c.) | Internally unconnected; no electrical function; must remain floating - not tied to ground or any net |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node (e.g., battery rail); carries full Zener current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - meets stress test requirements for automotive discrete semiconductors, enabling use in ASIL-B systems |
| Low capacitance | 1.5 pF at f = 1 MHz, VR = 0 V - minimizes signal distortion in high-frequency bias networks and RF front-end protection |
| Stable temperature coefficient | +12.4 mV/K at IZ = 5 mA - enables predictable drift compensation in temperature-critical reference designs |
| High surge capability | 40 W non-repetitive peak reverse power (100 µs pulse) - absorbs load-dump transients in 12 V vehicle electrical systems |
| Compact footprint | SOT323 package (2.2 × 1.35 mm) - saves board space in space-constrained ECUs and camera modules |
Applications
| Engine Control Unit (ECU) Power Rail Protection | ADAS Camera Module Reference Supply |
|---|---|
Use Scenario: Clamps 12 V battery line against load-dump spikes up to 40 V during alternator disconnection. IC Role / Device Role / Timing Role: Zener clamp diode providing passive overvoltage protection upstream of LDO regulators. Use Value: Limits transient voltage to ≤18 V using 16 V Zener knee, preventing damage to downstream 3.3 V microcontrollers and CAN transceivers. |
Use Scenario: Stabilizes bias voltage for image sensor analog front-end in automotive surround-view cameras. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC reference buffer and pixel bias generation. Use Value: Delivers 16 V ±5% reference with <200 Ω dynamic impedance, reducing sensor gain drift across −40 °C to +105 °C operating range. |
| Infotainment System USB Port ESD Clamp | Electric Power Steering (EPS) Motor Driver Feedback Divider |
Use Scenario: Suppresses ESD events on 5 V USB VBUS line before entering USB controller IC. IC Role / Device Role / Timing Role: Low-capacitance (1.5 pF) Zener clamp placed between VBUS and GND. Use Value: Responds within nanoseconds to ±8 kV contact discharge (IEC 61000-4-2), limiting voltage to <18 V without signal integrity degradation. |
Use Scenario: Sets upper resistor in voltage divider network monitoring high-side MOSFET drain voltage in EPS motor phase leg. IC Role / Device Role / Timing Role: Stable 16 V reference node defining overvoltage trip threshold for fault detection logic. Use Value: Enables accurate 60 V overvoltage detection with <1% error budget, leveraging tight ±5% tolerance and low tempco (+12.4 mV/K). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C16-Q | Same electrical specs and AEC-Q101 qualification; differs only in marking code (R9% vs. QX) and internal lot traceability | No functional difference; identical use in automotive power rails and reference circuits | Select when full Nexperia traceability and documented automotive release are required |
| MMSZ5245B-TP | 16 V ±5%, but rated for 500 mW Ptot and lacks AEC-Q101 qualification; Rth(j-a) = 357 K/W | Suitable for industrial/commercial boards; not approved for automotive under-hood deployment | Choose only for cost-sensitive non-automotive designs where higher power margin is needed and qualification is waived |
Compared with BZX84W-C16-QX, the BZX84W-C16-Q offers identical performance with enhanced traceability, while MMSZ5245B-TP trades automotive qualification for higher power rating - making the QX variant optimal for safety-critical vehicle subsystems requiring certified reliability.
Availability
BZX84W-C16-QX is available at Aetrix Electronics and suitable for automotive ECU protection, ADAS sensor reference supplies, infotainment ESD clamping, and EPS motor driver feedback networks requiring stable component supply with full AEC-Q101 documentation and lot-level traceability.
Supply support for BZX84W-C16-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 automotive-qualified Zener diode product line, engineered specifically for stable voltage reference and transient suppression in harsh-environment vehicle electronics.
FAQ
What is the maximum reverse voltage this Zener can sustain before breakdown?
The BZX84W-C16-QX has a nominal Zener voltage of 16 V ±5%, meaning its guaranteed breakdown occurs between 15.2 V and 16.8 V at IZ = 5 mA. It is not rated for sustained reverse voltage above 16.8 V - operation beyond this risks thermal runaway unless current is strictly limited by external series resistance.
Can Pin 2 (n.c.) be grounded or left floating in PCB layout?
Pin 2 is internally not connected and must remain electrically floating - neither grounded nor tied to any net. Grounding it may cause unintended parasitic coupling or solder bridging risk; the datasheet explicitly prohibits connection, and the SOT323 footprint reserves it as an isolation gap.
How does its 455 K/W thermal resistance impact PCB design?
With Rth(j-a) = 455 K/W, dissipating 275 mW raises junction temperature by ~125 °C above ambient - so at 75 °C ambient, Tj reaches 200 °C (exceeding 150 °C max). Designers must limit continuous power to ≤165 mW or add copper pour and thermal vias to reduce effective Rth.
Is this part suitable for high-frequency noise filtering applications?
Yes - its 1.5 pF junction capacitance at 1 MHz and VR = 0 V enables effective high-frequency bypassing up to ~100 MHz when used as a shunt clamp. However, it is not a dedicated RF filter; for >500 MHz noise suppression, a low-inductance TVS or multilayer ceramic capacitor is preferred.
BZX84W-C16-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):
- 16.2 V
- Tolerance:
- ±5.56%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 11.34 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-C16-QX FAQ
1.How can I place an order for BZX84W-C16-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C16-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-C16-QX reliable?
The price and inventory of BZX84W-C16-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-C16-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C16-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C16-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C16-QX?
BZX84W-C16-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C16-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-C16-QX?
For technical support, including BZX84W-C16-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C16-QX requirements.
6.How does Aetrix verify that BZX84W-C16-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C16-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-C16-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C16-QX?
All BZX84W-C16-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C16-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-C16-QX part is unused and in its original packaging.
Return procedure for BZX84W-C16-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C16-QX Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
