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Nexperia USA Inc. BZX84-C36/DG/B3R
- Part No.:
- BZX84-C36/DG/B3R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C36/DG/B3R.pdf
- Description:
- DIODE ZENER 36V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,114
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Product details
Overview
BZX84-C36/DG/B3R from Nexperia is a surface-mount Zener diode with a nominal breakdown voltage of 36 V, ±5% tolerance, 300 mW power dissipation, and 5 µA maximum reverse leakage current at 28.8 V. It operates in standard voltage regulation and overvoltage protection circuits for low-power consumer and industrial control systems.
For engineers reviewing the BZX84-C36/DG/B3R datasheet, BZX84-C36/DG/B3R pinout, BZX84-C36/DG/B3R application, or BZX84-C36/DG/B3R equivalent, key selection criteria include Zener voltage accuracy, power derating above 25°C, thermal resistance (RthJ-A = 500 K/W), and SOT23 package compatibility with automated PCB assembly.
Technical Context
This Zener diode uses silicon planar technology to achieve stable reverse-biased breakdown at 36 V with a dynamic impedance of 120 Ω at IZ = 5 mA. Its temperature coefficient is +0.075 %/K, indicating predictable voltage drift across -65°C to +150°C operating range.
The device is rated for continuous reverse power dissipation up to 300 mW at Tamb = 25°C, with linear derating to zero at 150°C. Junction-to-ambient thermal resistance is specified as 500 K/W under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - precise clamping threshold for overvoltage protection at 25°C |
| Power Dissipation (Ptot) | 300 mW - limits sustained current to ~8.3 mA at 36 V without thermal runaway |
| Reverse Leakage (IR) | ≤5 µA at 28.8 V - ensures minimal standby current in voltage reference paths |
| Zener Impedance (ZZT) | 120 Ω at IZ = 5 mA - determines regulation error under load transients |
| Temperature Coefficient | +0.075 %/K - enables predictable VZ shift in ambient temperature variations |
| Junction-to-Ambient Rth | 500 K/W - defines required PCB copper area for safe thermal management |
Pinout & Package
SOT23 plastic surface-mount package with three terminals: anode (pin 1), cathode (pin 2), and unused terminal (pin 3) - pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential side of regulated node; reverse-biased during Zener operation |
| Pin 2 | Cathode | Connected to higher-potential side; carries full Zener current during clamping |
| Pin 3 | NC (No Connection) | Internally unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage tolerance | ±5% at IZ = 5 mA - reduces need for post-production calibration in reference designs |
| Low dynamic impedance | 120 Ω - maintains <1% output variation under ±2 mA load changes |
| Wide operating temperature range | -65°C to +150°C - supports deployment in automotive engine compartments and industrial enclosures |
| SOT23 footprint compatibility | Standard JEDEC TO-236AB outline - enables drop-in replacement in existing 3-pin regulator layouts |
Applications
| USB Port Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamps transient surges on USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Zener clamp element placed between VBUS and ground, conducting only above 36 V. Use Value: Limits peak voltage to ≤36 V, protecting downstream 5 V-tolerant USB PHY ICs without adding series resistance. | Use Scenario: Provides clean, temperature-stable reset threshold for 3.3 V microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Voltage reference in RC-based reset generator circuit, biasing comparator input. Use Value: Enables accurate 36 V reference scaling to 3.3 V logic threshold via resistor divider, minimizing reset window uncertainty. |
| Industrial Sensor Signal Conditioning | LED Driver Overvoltage Clamp |
Use Scenario: Protects analog front-end inputs of 4–20 mA loop-powered sensors from field wiring faults. IC Role / Device Role / Timing Role: Reverse-biased shunt limiter across signal path, activated only during >36 V fault events. Use Value: Prevents damage to precision op-amps and ADCs while maintaining <5 µA leakage during normal 0–24 V operation. | Use Scenario: Safeguards constant-current LED driver ICs against open-circuit voltage spikes when string disconnects. IC Role / Device Role / Timing Role: Parallel clamp across LED string terminals, limiting forward voltage to 36 V. Use Value: Avoids destructive overvoltage on driver MOSFETs and internal regulators during fault recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5245BS-7-F | 36 V ±5%, 350 mW, SOT323 package, RthJ-A = 450 K/W | Higher power rating allows 9.7 mA max Zener current; smaller footprint requires rework of land pattern | Select when higher power margin or tighter thermal resistance is required and board space permits SOT323 |
| BZX84-C36-7-F | Identical electrical specs, same SOT23 package, but different tape-and-reel packaging code | No functional difference; differs only in reel orientation and moisture sensitivity level (MSL 1 vs MSL 3) | Select for direct substitution where packaging logistics or humidity handling requirements align |
Compared with BZX84-C36/DG/B3R, MMBZ5245BS-7-F offers higher power headroom in a smaller package but demands layout revision, while BZX84-C36-7-F provides identical performance with minor packaging-level differences suitable for seamless logistics replacement.
Availability
BZX84-C36/DG/B3R is available at Aetrix Electronics and suitable for USB port protection, microcontroller reset circuits, and industrial sensor signal conditioning requiring stable component supply and consistent Zener voltage performance.
Supply support for BZX84-C36/DG/B3R 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 energy-efficient solutions.
This part belongs to the BZX84-C series of general-purpose Zener diodes designed specifically for voltage regulation, reference, and overvoltage protection in cost-sensitive, space-constrained consumer and industrial electronics.
FAQ
What is the maximum continuous Zener current for BZX84-C36/DG/B3R at 25°C?
The maximum continuous Zener current is calculated from Ptot = 300 mW and VZ = 36 V, yielding IZ(max) ≈ 8.3 mA at 25°C ambient. Derating applies above 25°C per the 500 K/W thermal resistance specification, reducing usable current linearly to zero at 150°C junction temperature.
Is pin 3 of the SOT23 package electrically connected?
No, pin 3 is internally unconnected (NC) and electrically isolated. It may be left floating or tied to ground for mechanical stability, but it must not be used as a current-carrying terminal. This configuration is confirmed in Nexperia's official SOT23 footprint drawing and device marking diagram for BZX84-C36/DG/B3R.
How does the +0.075 %/K temperature coefficient affect regulation accuracy over temperature?
At a 100°C temperature rise (e.g., from 25°C to 125°C), the Zener voltage shifts by +0.075 %/K × 100 K = +7.5%, or +2.7 V from 36 V. This results in a total VZ range of 36 V ±5% ±2.7 V, requiring system-level tolerance analysis for precision reference applications.
Can BZX84-C36/DG/B3R replace BZX84-C33 in a 33 V clamp circuit?
No - BZX84-C36/DG/B3R has a nominal Zener voltage of 36 V, not 33 V. Substituting it into a 33 V clamp design would raise the clamping threshold by 3 V, potentially exposing downstream components to damaging overvoltage. The 3 V difference exceeds typical system margin allowances and violates the ±5% tolerance overlap between the two parts.
BZX84-C36/DG/B3R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 250 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:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C36/DG/B3R FAQ
1.How can I place an order for BZX84-C36/DG/B3R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C36/DG/B3R 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 BZX84-C36/DG/B3R reliable?
The price and inventory of BZX84-C36/DG/B3R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C36/DG/B3R is usually 5 days.
3.What payment methods are accepted for BZX84-C36/DG/B3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C36/DG/B3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C36/DG/B3R?
BZX84-C36/DG/B3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C36/DG/B3R 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 BZX84-C36/DG/B3R?
For technical support, including BZX84-C36/DG/B3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C36/DG/B3R requirements.
6.How does Aetrix verify that BZX84-C36/DG/B3R is sourced from the original manufacturer or authorized distributors?
All BZX84-C36/DG/B3R 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 BZX84-C36/DG/B3R meets industry standards.
7.What is the process for return or replacement of BZX84-C36/DG/B3R?
All BZX84-C36/DG/B3R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C36/DG/B3R, 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 BZX84-C36/DG/B3R part is unused and in its original packaging.
Return procedure for BZX84-C36/DG/B3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C36/DG/B3R Tags
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