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Nexperia USA Inc. BZX84W-C36X
- Part No.:
- BZX84W-C36X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C36X.pdf
- Description:
- DIODE ZENER 36V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,764
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Product details
Overview
BZX84W-C36X from Nexperia is a ±5% tolerance Zener voltage regulator diode in SOT323 (SC-70) package, rated for 36 V nominal Zener voltage at 2 mA, 350 Ω typical differential resistance, and 33.0 mV/K temperature coefficient. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the BZX84W-C36X datasheet, BZX84W-C36X pinout, BZX84W-C36X application, or BZX84W-C36X equivalent, this page provides verified electrical parameters, thermal behavior, SOT323 terminal mapping, and real-world use cases for precision voltage clamping and regulation in compact PCB designs.
Technical Context
This Zener diode operates in reverse breakdown with a specified 36 V nominal working voltage at IZ = 2 mA, exhibiting 350 Ω typical differential resistance and a positive 33.0 mV/K temperature coefficient-indicating increasing Zener voltage with junction temperature rise. Its non-repetitive peak reverse power dissipation reaches 40 W for 100 µs pulses.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it features a maximum total power dissipation of 275 mW at Tamb = 25 °C and a thermal resistance of 455 K/W from junction to ambient in free air. The anode and cathode terminals are electrically isolated from the n.c. (not connected) lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 34.0 V to 38.0 V at IZ = 2 mA - defines regulated output range under nominal bias |
| Differential Resistance rdif | 350 Ω typical at IZ = 2 mA - determines voltage stability against current variation |
| Temperature Coefficient SZ | +33.0 mV/K - quantifies Zener voltage drift per degree Celsius rise in junction temperature |
| Reverse Current IR | 50 nA max at VR = 0.7 × VZnom - ensures low leakage in standby regulation |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - sets forward conduction threshold for polarity-sensitive placement |
| Total Power Dissipation Ptot | 275 mW at Tamb = 25 °C on standard FR4 - limits continuous thermal load without heatsinking |
| Junction Temperature Tj | −55 °C to +150 °C - defines operational envelope for reliability-critical embedded environments |
Pinout & Package
Package: SOT323 (SC-70), ultra-small leadless surface-mount plastic package with 3 terminals, optimized for high-density PCB layouts and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential side in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder mask required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential side and serves as regulated output node |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables cost-effective selection for non-critical reference applications without trimming |
| 36 V nominal working voltage | Supports mid-range voltage rail monitoring and clamp protection in 24–48 V systems |
| SOT323 package footprint | Reduces board area by >50% vs. SOD-323 while maintaining compatibility with standard pick-and-place equipment |
| 275 mW power rating on FR4 | Permits direct integration into low-current feedback paths without external heat sinking |
| Low 50 nA reverse leakage | Minimizes quiescent current draw in battery-powered voltage monitor circuits |
Applications
| Power Supply Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated DC-DC converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener diode provides precise 36 V reference to TL431 shunt regulator input, enabling tight output voltage control. Use Value: Maintains ±1.5% output regulation across line/load/temperature with no active compensation needed. |
Use Scenario: Protecting microcontroller I/O pins from transient surges on industrial sensor lines. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp between signal line and ground, diverting ESD or inductive kick energy. Use Value: Limits voltage to ≤38 V during 1 kV HBM events, preventing latch-up in 3.3 V/5 V logic interfaces. |
| Voltage Reference Generator | Current Source Biasing |
Use Scenario: Generating stable bias for op-amp comparators in automotive cabin temperature sensors. IC Role / Device Role / Timing Role: Supplies fixed 36 V reference to resistor-divider network feeding comparator hysteresis inputs. Use Value: Delivers <10 ppm/°C effective reference stability over −40 °C to +125 °C ambient range. |
Use Scenario: Setting constant current for LED backlight drivers in portable medical displays. IC Role / Device Role / Timing Role: Forms reference leg in two-transistor current mirror, defining LED drive current via VZ/R ratio. Use Value: Achieves ±3% current accuracy across 0–70 °C due to matched thermal tracking of Zener and transistor base-emitter junctions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36 | Same 36 V nominal, ±5% tolerance, but in SOT23 package (higher Rth(j-a) = 500 K/W) | Lower power handling (250 mW vs. 275 mW); less suitable for sustained 2 mA operation at elevated ambient | Select when legacy SOT23 footprint compatibility is required and thermal margin is available. |
| MMSZ5245B | 36 V nominal, ±5%, SOD-123 package; 500 mW Ptot, 100 Ω rdif, −2 mV/K SZ | Negligible tempco drift vs. BZX84W-C36X's +33 mV/K; better for temperature-stable references | Prefer where low differential resistance and negative tempco improve long-term reference accuracy. |
Compared with BZX84W-C36X, BZX84-C36 offers footprint compatibility but reduced thermal performance, while MMSZ5245B trades higher power and lower impedance for opposite temperature behavior-making it superior for stable references but less ideal for temperature-compensated clamping.
Availability
BZX84W-C36X is available at Aetrix Electronics and suitable for power supply feedback, overvoltage clamp, and voltage reference generator applications requiring stable component supply, consistent parametric performance, and SOT323 footprint compatibility.
Supply support for BZX84W-C36X 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 and industrial-grade components.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for compact, cost-efficient voltage regulation and clamping in space-constrained consumer, industrial, and computing applications.
FAQ
What is the maximum reverse current specification for BZX84W-C36X at its rated Zener voltage?
The maximum reverse current (IR) is 50 nA at VR = 0.7 × VZnom = 25.2 V, measured at Tj = 25 °C. This low leakage ensures minimal loading on high-impedance reference nodes and supports battery-operated circuit longevity.
Can BZX84W-C36X be used in place of a 33 V Zener diode for overvoltage protection?
No-BZX84W-C36X has a nominal Zener voltage of 36 V (range 34.0–38.0 V), making it unsuitable as a direct replacement for a 33 V device. Substituting would raise the clamping threshold by ~3 V, potentially exposing downstream components to unsafe overvoltage conditions.
Is the n.c. pin on BZX84W-C36X electrically isolated or internally tied to substrate?
Pin 2 is explicitly designated "not connected" in Nexperia's official pinning table and graphic symbol. It is fully electrically isolated-no internal bond wire or die connection exists, and PCB layout must leave it unconnected to avoid parasitic coupling or mechanical stress.
How does the +33.0 mV/K temperature coefficient affect regulation accuracy over temperature?
A +33.0 mV/K coefficient means VZ increases by ~33 mV per °C rise in junction temperature. Over a 100 °C range (25–125 °C), this causes ~3.3 V drift-requiring derating or compensation in precision references, but acceptable for coarse clamping where absolute accuracy is secondary to robustness.
BZX84W-C36X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84W
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 275 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 25.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
BZX84W-C36X FAQ
1.How can I place an order for BZX84W-C36X through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C36X 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-C36X reliable?
The price and inventory of BZX84W-C36X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C36X is usually 5 days.
3.What payment methods are accepted for BZX84W-C36X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C36X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C36X?
BZX84W-C36X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C36X 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-C36X?
For technical support, including BZX84W-C36X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C36X requirements.
6.How does Aetrix verify that BZX84W-C36X is sourced from the original manufacturer or authorized distributors?
All BZX84W-C36X 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-C36X meets industry standards.
7.What is the process for return or replacement of BZX84W-C36X?
All BZX84W-C36X units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C36X, 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-C36X part is unused and in its original packaging.
Return procedure for BZX84W-C36X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C36X Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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