My Inquiry
My Account
Nexperia USA Inc. BZX84W-C3V6-QX
- Part No.:
- BZX84W-C3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,784
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX84W-C3V6-QX from Nexperia is a ±5 % tolerance Zener diode in SOT323 (SC-70) package, rated for 3.6 V nominal regulation voltage at 5 mA, 275 mW total power dissipation, and qualified to AEC-Q101 for automotive use. It delivers stable voltage reference in low-power biasing, overvoltage clamping, and signal-level regulation circuits.
For engineers reviewing the BZX84W-C3V6-QX datasheet, BZX84W-C3V6-QX pinout, BZX84W-C3V6-QX application, or BZX84W-C3V6-QX equivalent, key selection criteria include Zener voltage tolerance (±5 %), differential resistance (90 Ω at 5 mA), reverse leakage (5 µA at 1 V), thermal resistance (455 K/W), and AEC-Q101 qualification status.
Technical Context
This Zener diode operates in reverse breakdown with a nominal Zener voltage of 3.6 V at IZ = 5 mA, exhibiting a negative temperature coefficient of −2.4 mV/K across 25–150 °C. Its differential resistance is 90 Ω under regulation conditions, enabling precise voltage stabilization in low-current reference paths.
The device features a not-connected (n.c.) terminal (Pin 2), anode (Pin 1), and cathode (Pin 3), packaged in a leadless SOT323 footprint optimized for high-frequency decoupling and space-constrained PCB layouts. Thermal performance is specified with Rth(j-a) = 455 K/W on FR4 with single-sided copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.40 V to 3.80 V at IZ = 5 mA - defines regulation band for precision biasing |
| Tolerance | ±5 % - ensures predictable clamping threshold in automotive sensor interfaces |
| Differential Resistance (rdif) | 90 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Reverse Leakage (IR) | 5 µA at VR = 1 V - limits quiescent current in always-on protection circuits |
| Total Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability per stress test requirements |
Pinout & Package
SOT323 (SC-70) surface-mount plastic package: 1.35 mm × 1.75 mm × 0.95 mm body, 0.65 mm pitch, leadless terminations with tin-plated copper leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire or die connection; must remain unconnected |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - enables direct use in engine control units and ADAS sensor modules without requalification |
| Low-leakage regulation | 5 µA reverse current at 1 V - minimizes standby power loss in battery-backed systems |
| High-frequency stability | 6 pF junction capacitance at 1 MHz - supports noise suppression in switching regulator feedback paths |
| Compact thermal design | 455 K/W junction-to-ambient thermal resistance - allows reliable operation on minimal copper area |
| Wide voltage range support | Part of 2.4–75 V E24 series - simplifies BOM consolidation across multiple voltage rails |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Providing stable 3.6 V reference for analog front-end circuitry in vehicle cabin temperature sensors. IC Role / Device Role / Timing Role: Zener voltage reference and supply rail clamp protecting ADC input stages. Use Value: Maintains ±5 % regulation accuracy across −40 °C to +125 °C ambient, meeting ASIL-B functional safety margins. |
Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance shunt protector limiting peak voltage to 3.8 V before TVS activation. Use Value: 6 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 data lines. |
| Industrial PLC Input Protection | IoT Node Voltage Reference |
|
Use Scenario: Protecting 24 V digital input channels against field-wiring transients in factory automation controllers. IC Role / Device Role / Timing Role: Primary Zener clamp absorbing repetitive 100 µs surges up to 40 W non-repetitive peak power. Use Value: Withstands 200 mA forward surge current and maintains regulation after repeated 1 kV ESD events. |
Use Scenario: Generating stable 3.6 V bias for ultra-low-power MCU reset monitoring in battery-operated smart meters. IC Role / Device Role / Timing Role: Low-quiescent-current voltage reference enabling <1 µA sleep-mode current budget. Use Value: 5 µA reverse leakage at 1 V ensures sub-5 nW standby power consumption in always-on monitoring circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84W-C3V6 | No automotive qualification; same electrical specs and SOT323 package | Not suitable for AEC-Q101-mandated automotive designs | Select when cost-sensitive industrial or consumer applications require identical regulation but lack automotive compliance needs |
| MMSZ4685-TP | 3.6 V ±5 %, 500 mW Ptot, SOD-123 package, no AEC-Q101 | Higher power rating but larger footprint and no automotive qualification | Choose for higher-power non-automotive applications where board space permits larger package and thermal margin is critical |
Compared with BZX84W-C3V6-QX, the BZX84W-C3V6 lacks AEC-Q101 validation and cannot be used in automotive production, while MMSZ4685-TP offers double the power rating but requires 3× more PCB area and provides no automotive reliability assurance.
Availability
BZX84W-C3V6-QX is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage clamping, and industrial PLC input protection requiring stable component supply, AEC-Q101 traceability, and SOT323 footprint compatibility.
Supply support for BZX84W-C3V6-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, logic, and MOSFET solutions for automotive, industrial, and mobile markets.
The BZX84W-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for robust voltage regulation and transient protection in harsh-environment electronic control units.
FAQ
What is the maximum reverse current at 1 V for BZX84W-C3V6-QX?
The maximum reverse current (IR) is 5 µA at VR = 1 V and Tj = 25 °C, measured per Table 7 of the official Nexperia datasheet. This low leakage supports energy-efficient operation in always-on circuits and ensures minimal loading on upstream voltage sources.
Is Pin 2 internally connected in the SOT323 package?
No - Pin 2 is explicitly designated "not connected" (n.c.) in Table 2 of the datasheet and has no internal bond wire or die connection. It must remain unconnected on the PCB; soldering or routing to this terminal may cause mechanical stress or unintended parasitic coupling.
How does the −2.4 mV/K temperature coefficient affect regulation stability?
The negative temperature coefficient means VZ decreases by 2.4 mV per Kelvin rise in junction temperature. At 125 °C ambient (with self-heating), regulation shifts ~−240 mV from 25 °C value - a known, bounded drift used in compensated reference designs and accounted for in automotive sensor calibration routines.
Can BZX84W-C3V6-QX replace BZX84-C3V6 in an existing design?
Yes, electrically - both share identical VZ, tolerance, and package - but BZX84W-C3V6-QX adds AEC-Q101 qualification, tighter process controls, and extended temperature range (−55 °C to +150 °C). Replacement is valid for automotive upgrades; no layout change is needed due to identical SOT323 footprint and pinout.
BZX84W-C3V6-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):
- 3.6 V
- Tolerance:
- ±5.56%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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-C3V6-QX FAQ
1.How can I place an order for BZX84W-C3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C3V6-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-C3V6-QX reliable?
The price and inventory of BZX84W-C3V6-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-C3V6-QX is usually 5 days.
3.What payment methods are accepted for BZX84W-C3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C3V6-QX?
BZX84W-C3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C3V6-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-C3V6-QX?
For technical support, including BZX84W-C3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C3V6-QX requirements.
6.How does Aetrix verify that BZX84W-C3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX84W-C3V6-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-C3V6-QX meets industry standards.
7.What is the process for return or replacement of BZX84W-C3V6-QX?
All BZX84W-C3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C3V6-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-C3V6-QX part is unused and in its original packaging.
Return procedure for BZX84W-C3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C3V6-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…
