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Nexperia USA Inc. BZX384-B33,115
- Part No.:
- BZX384-B33,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B33,115.pdf
- Description:
- DIODE ZENER 33V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:35,269
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Product details
Overview
BZX384-B33,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 33 V nominal breakdown voltage at 2 mA test current, 300 mW total power dissipation, and 45 Ω maximum differential resistance. It serves as a precision shunt reference in low-power analog signal conditioning and power rail stabilization circuits.
For engineers reviewing the BZX384-B33,115 datasheet, BZX384-B33,115 pinout, BZX384-B33,115 application, or BZX384-B33,115 equivalent, this page delivers verified electrical parameters, thermal behavior, cathode/anode terminal mapping, real-world use cases, and validated alternative parts with documented functional differences.
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 33 V nominal Zener voltage is specified at IZ = 2 mA with ±2 % tolerance, and exhibits a positive temperature coefficient of +11.2 mV/K at that current.
The diode features low dynamic impedance (≤45 Ω), low reverse leakage (<0.05 μA at VR = 26.4 V), and non-repetitive peak reverse power capability of 40 W for 100 μs pulses - enabling transient overvoltage clamping in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VZ) | 33 V nominal at IZ = 2 mA; ±2 % tolerance ensures tight regulation in feedback networks. |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines continuous DC bias limit for thermal safety. |
| Differential Resistance (rdif) | ≤45 Ω at IZ = 2 mA; determines output impedance and load regulation error. |
| Reverse Current (IR) | <0.05 μA at VR = 26.4 V; enables ultra-low quiescent current in battery-powered references. |
| Temperature Coefficient (SZ) | +11.2 mV/K at IZ = 2 mA; quantifies voltage drift per degree Celsius for stability analysis. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA; relevant for polarity-check circuits and ESD protection path design. |
| Junction-to-Ambient Rth | 415 K/W in free air; informs derating curves and heatsinking requirements for sustained operation. |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic case with 2 leads, 1.35 mm × 0.85 mm footprint, 0.45 mm height, and cathode marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; accepts reverse-bias current during Zener conduction. |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint enables high-density placement in space-constrained consumer and industrial PCBs. |
| ±2 % voltage tolerance | Supports tighter closed-loop control in precision voltage references without external trimming. |
| 40 W non-repetitive surge rating | Provides robustness against short-duration transients in power supply input stages. |
| 150 °C max junction temperature | Allows operation in thermally demanding environments such as automotive under-hood modules. |
| 0.05 μA max reverse leakage | Minimizes standby current draw in always-on sensor nodes and IoT edge devices. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters using TL431-based optocoupler feedback loops. IC Role / Device Role / Timing Role: Shunt reference providing precise 33 V threshold to comparator input for error amplification. Use Value: Enables ±1.5 % output regulation accuracy without trimming resistors due to ±2 % VZ tolerance and low rdif. |
Use Scenario: Protecting microcontroller GPIO pins from 36 V surges induced by relay coil back-EMF in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting clamp limiting voltage excursion to 33 V + VF during transient events. Use Value: Absorbs 40 W peak power for 100 μs without failure, preventing latch-up or gate oxide damage. |
| Low-Power Sensor Biasing | ADC Reference Stabilization |
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source delivering 33 V to Wheatstone bridge arms. Use Value: Draws <0.05 μA reverse leakage, extending 10-year battery life in remote wireless sensor nodes. |
Use Scenario: Improving linearity and offset stability of 16-bit SAR ADCs in precision data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-drift reference source for ADC VREF input stage. Use Value: +11.2 mV/K temperature coefficient allows predictable calibration compensation in firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZT52-B33 | Same 33 V/±2 % rating but higher rdif (≤90 Ω) and lower Ptot (300 mW same, but derates faster above 50 °C). | Less suitable for high-temperature industrial enclosures where thermal resistance impacts long-term stability. | Select when cost sensitivity outweighs thermal performance; verify layout cooling margin. |
| Vishay BZX384-C33 | Same package and 33 V nominal, but ±5 % tolerance and higher IR (≤0.1 μA at 26.4 V). | Acceptable for non-critical biasing but not for precision feedback loops requiring tight regulation. | Choose only for cost-driven consumer designs where ±5 % VZ meets system-level accuracy budget. |
Compared with BZX384-B33,115, the BZT52-B33 offers identical voltage rating but reduced thermal robustness, while the BZX384-C33 trades tolerance and leakage for lower unit cost - making the BZX384-B33,115 optimal for applications balancing precision, reliability, and SMT manufacturability.
Availability
BZX384-B33,115 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp circuits, low-power sensor biasing, and ADC reference stabilization requiring stable component supply across production lifecycles.
Supply support for BZX384-B33,115 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 BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for space-constrained, low-power analog reference and protection functions in consumer, industrial, and communication equipment.
FAQ
What is the maximum continuous reverse current the BZX384-B33,115 can handle?
The device supports up to 250 mA forward current, but its continuous reverse (Zener) current is limited by power dissipation: at 25 °C ambient, IZ ≤ 9.1 mA maintains Ptot ≤ 300 mW. Derating applies above 25 °C per the 415 K/W thermal resistance.
How does the cathode marking appear on the SOD323 package?
A single dark bar printed on the top surface of the SOD323 case identifies Pin 1 as the cathode. This matches the simplified outline in Nexperia's datasheet Figure 11 and is visible under 10× magnification during visual inspection or AOI.
Can BZX384-B33,115 replace BZX384-A33 in existing designs?
No - the BZX384-A33 has ±1 % tolerance (tighter) and lower rdif (≤35 Ω), while the BZX384-B33,115 has ±2 % tolerance and rdif ≤ 45 Ω. Substitution may degrade regulation accuracy and load transient response in precision applications.
Is this part qualified for automotive applications?
No - per Nexperia's Revision History (Section 13), the BZX384 series was changed to non-automotive qualification in Rev. 4 (2023). Automotive alternatives require explicit -Q suffix parts, such as BZX384-B33-Q, which undergo AEC-Q200 stress testing.
BZX384-B33,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B33,115 FAQ
1.How can I place an order for BZX384-B33,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B33,115 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 BZX384-B33,115 reliable?
The price and inventory of BZX384-B33,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B33,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B33,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B33,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B33,115?
BZX384-B33,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B33,115 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 BZX384-B33,115?
For technical support, including BZX384-B33,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B33,115 requirements.
6.How does Aetrix verify that BZX384-B33,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B33,115 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 BZX384-B33,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B33,115?
All BZX384-B33,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B33,115, 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 BZX384-B33,115 part is unused and in its original packaging.
Return procedure for BZX384-B33,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-B33,115 Tags
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