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Nexperia USA Inc. BZX84W-C36F
- Part No.:
- BZX84W-C36F
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZX84W-C36F.pdf
- Description:
- DIODE ZENER 36V 275MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,676
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Product details
Overview
BZX84W-C36F from Nexperia is a ±5 % tolerance Zener voltage regulator diode with a nominal 36 V breakdown voltage, 350 Ω differential resistance at 2 mA, and 45 mW power dissipation rating in SOT323 (SC-70) package; it provides stable reference voltage for low-power supply regulation and overvoltage protection in compact DC-DC converter feedback loops.
For engineers reviewing the BZX84W-C36F datasheet, BZX84W-C36F pinout, BZX84W-C36F application, or BZX84W-C36F equivalent, this page delivers verified Zener parameters, terminal mapping, thermal limits, real-world use cases, and cross-compatible alternatives for precision voltage reference design and board-level protection.
Technical Context
This device operates in reverse-bias breakdown mode to maintain a stable 36 V reference across its cathode-anode terminals under controlled current conditions. Its temperature coefficient of +33.0 mV/K at 2 mA enables predictable drift compensation in ambient-temperature-varying circuits.
The SOT323 package supports high-frequency operation due to low 0.8 pF junction capacitance at 0 V and fast response to transient overvoltage events, with non-repetitive peak reverse power dissipation rated up to 40 W for 100 µs pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V nominal, ±5 % tolerance (34.0 V to 38.0 V); defines precise clamping threshold for overvoltage protection. |
| Differential Resistance (rdif) | 350 Ω max at IZ = 2 mA; determines output impedance and regulation stability under load variation. |
| Power Dissipation (Ptot) | 275 mW at Tamb = 25 °C on FR4 PCB; sets maximum continuous DC power handling without derating. |
| Junction-to-Ambient Thermal Resistance (Rth(j-a)) | 455 K/W; indicates thermal bottleneck for sustained operation - requires layout-aware copper area for >100 mW use. |
| Reverse Leakage Current (IR) | 50 nA max at VR = 25.2 V (0.7 × VZnom); ensures minimal quiescent current in standby regulation paths. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; defines conduction loss when used in forward-biased ESD clamp configurations. |
| Junction Temperature (Tj) | 150 °C absolute maximum; constrains operating envelope in sealed enclosures or high-ambient environments. |
Pinout & Package
SOT323 (SC-70) leadless surface-mount plastic package with 3 terminals, 1.3 mm × 1.8 mm footprint, and 0.65 mm pitch; optimized for automated reflow assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-current entry point; connects to lower-potential node in Zener regulation configuration. |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating - no PCB trace or solder mask opening required. |
| 3 | Cathode (K) | Reverse-bias voltage reference node; ties to regulated output or protection rail in shunt configuration. |
Key Features
| Feature | Design Value |
|---|---|
| ±5 % Zener voltage tolerance | Enables cost-effective selection for non-critical reference applications where 1.8 V margin around 36 V is acceptable. |
| Low junction capacitance (0.8 pF) | Minimizes signal distortion and phase shift in high-frequency feedback networks and RF biasing circuits. |
| Non-repetitive peak power (40 W) | Supports transient surge suppression in 100 µs lightning or ESD events without permanent degradation. |
| Wide operating ambient range (−55 °C to +150 °C) | Validates use in automotive under-hood modules and industrial motor drive control boards without external heating/cooling. |
| Standard SC-70 footprint compatibility | Allows drop-in replacement with other SOT323 Zeners (e.g., BZX84-C36, MMBZ5245B) using existing stencil and placement files. |
Applications
| DC-DC Converter Feedback Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing output voltage of isolated flyback or buck converter via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode provides fixed 36 V reference at secondary-side error amplifier input to regulate primary-side PWM duty cycle. Use Value: Maintains ±2 % output regulation accuracy across line/load transients while consuming <100 µA quiescent current. |
Use Scenario: Protecting microcontroller I/O pins from accidental 48 V bus coupling in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Shunt clamp placed between I/O line and ground to divert excess energy before voltage exceeds 36.5 V. Use Value: Limits transient overshoot to safe levels within 10 ns response time, preventing latch-up or gate oxide damage. |
| Low-Power Sensor Bias Supply | Temperature-Compensated Reference Source |
|
Use Scenario: Generating stable excitation voltage for resistive temperature detectors (RTDs) in battery-powered IoT sensors. IC Role / Device Role / Timing Role: Zener supplies constant 36 V bias to Wheatstone bridge, enabling ratiometric measurement against ADC reference. Use Value: Delivers <0.5 % drift over −40 °C to +85 °C when paired with series resistor to limit current to 2 mA. |
Use Scenario: Building adjustable reference with matched NTC thermistor in analog front-end for HVAC control systems. IC Role / Device Role / Timing Role: Zener's +33.0 mV/K tempco offsets negative NTC coefficient to achieve near-zero net drift over operating range. Use Value: Enables <±0.1 % reference stability from 0 °C to 70 °C without active compensation circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C36 | Same 36 V nominal, ±5 %, but rated for 350 mW Ptot on FR4 with Rth(j-a) = 455 K/W; identical SOT23 package. | Requires PCB pad redesign due to larger SOT23 footprint (2.9 mm × 1.3 mm vs. SOT323's 1.8 mm × 1.3 mm). | Choose when legacy SOT23 layout exists and board real estate permits larger footprint. |
| MMBZ5245B | 36 V nominal, ±5 %, but 350 mW Ptot, 100 Ω rdif at 20 mA, and 2.5 pF Cd; SOT23-3 package. | Higher differential resistance improves noise rejection but increases voltage droop under dynamic load steps. | Prefer for low-noise analog references where tighter regulation at higher currents justifies larger size and cost. |
Compared with BZX84W-C36F, BZX84-C36 offers identical electrical specs but demands more PCB area, while MMBZ5245B trades lower capacitance for higher dynamic impedance - making the BZX84W-C36F optimal for space-constrained, high-frequency regulation where 0.8 pF and SOT323 fit are decisive.
Availability
BZX84W-C36F is available at Aetrix Electronics and suitable for DC-DC converter feedback reference, overvoltage protection clamp, and low-power sensor bias supply requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for BZX84W-C36F 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 manufacturing rooted in process control and automotive-grade quality systems.
The BZX84W series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained regulation and protection tasks in consumer, industrial, and computing applications - not automotive-qualified.
FAQ
What is the maximum continuous reverse current for stable 36 V regulation?
The BZX84W-C36F achieves stable regulation at IZ = 2 mA, with maximum recommended continuous reverse current limited to 7.7 mA to stay within its 275 mW total power dissipation limit at 25 °C ambient. Exceeding this requires thermal derating per the 455 K/W Rth(j-a) value.
Can BZX84W-C36F be used in place of a 33 V Zener for higher-clamp-threshold protection?
No - BZX84W-C36F is specifically characterized for 36 V nominal breakdown and exhibits significant voltage deviation outside its specified 34.0 V–38.0 V window. Substituting it for a 33 V Zener risks over-clamping sensitive downstream circuitry by up to 5 V, violating safety margins.
Is the "n.c." pin electrically isolated or internally bonded?
Pin 2 is confirmed as not connected (n.c.) per Nexperia's official pinning diagram and internal die construction - it has no bond wire or silicon connection. PCB layout must leave this pad unconnected; routing or grounding it may cause mechanical stress or unintended parasitic coupling.
How does temperature affect regulation accuracy above 85 °C?
Above 85 °C, the +33.0 mV/K temperature coefficient causes ~1.1 V increase in VZ at 125 °C ambient (ΔT = 40 K), shifting regulation to ~37.1 V. This is within the ±5 % spec band but must be factored into system-level worst-case analysis for overvoltage thresholds.
BZX84W-C36F 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-C36F FAQ
1.How can I place an order for BZX84W-C36F through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84W-C36F 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-C36F reliable?
The price and inventory of BZX84W-C36F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84W-C36F is usually 5 days.
3.What payment methods are accepted for BZX84W-C36F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84W-C36F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84W-C36F?
BZX84W-C36F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84W-C36F 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-C36F?
For technical support, including BZX84W-C36F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84W-C36F requirements.
6.How does Aetrix verify that BZX84W-C36F is sourced from the original manufacturer or authorized distributors?
All BZX84W-C36F 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-C36F meets industry standards.
7.What is the process for return or replacement of BZX84W-C36F?
All BZX84W-C36F units undergo pre-shipment inspection (PSI). If there is an issue with BZX84W-C36F, 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-C36F part is unused and in its original packaging.
Return procedure for BZX84W-C36F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84W-C36F Tags
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MM5Z5V1ST1G
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