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Nexperia USA Inc. BZX84-C33/DG/B3R
- Part No.:
- BZX84-C33/DG/B3R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C33/DG/B3R.pdf
- Description:
- DIODE ZENER 33V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,965
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Product details
Overview
BZX84-C33/DG/B3R from Nexperia is a surface-mount Zener diode with nominal 33 V breakdown voltage, 500 mW power dissipation, ±5% tolerance, 100 nA maximum reverse leakage at 25.4 V, and DO-213AA (MiniMELF) package. It provides precise voltage regulation in low-power reference and protection circuits for industrial sensor interfaces.
For engineers reviewing the BZX84-C33/DG/B3R datasheet, BZX84-C33/DG/B3R pinout, BZX84-C33/DG/B3R application, or BZX84-C33/DG/B3R equivalent, key selection criteria include Zener voltage accuracy, thermal stability over -65 °C to +150 °C, low dynamic impedance (90 Ω typical at 5 mA), and compatibility with automated SMT assembly on PCBs with 1.5 mm pad pitch.
Technical Context
This Zener diode operates in reverse-bias breakdown mode to maintain stable voltage across its terminals under varying load or supply conditions. Its 33 V nominal Zener voltage is specified at test current of 5 mA, with dynamic impedance of 90 Ω ensuring minimal output variation with current shifts.
The device exhibits a positive temperature coefficient of +0.07 %/°C above 5.1 V, resulting in predictable voltage drift over temperature. Its DO-213AA glass-body package supports reflow soldering per JEDEC J-STD-020 and delivers thermal resistance of 400 K/W junction-to-ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZ = 5 mA - defines regulated output level in shunt regulator designs |
| Power Dissipation (Ptot) | 500 mW - limits continuous current to ~15 mA at 33 V without derating |
| Dynamic Impedance (ZZT) | 90 Ω typical at 5 mA - determines output voltage ripple sensitivity to load transients |
| Reverse Leakage (IR) | 100 nA max at 25.4 V - ensures low quiescent current in high-impedance bias networks |
| Operating Temperature | -65 °C to +150 °C - enables use in automotive engine control modules and industrial PLC I/O stages |
| Package | DO-213AA (MiniMELF) - cylindrical glass package with 3.3 mm length × 1.1 mm diameter, compatible with pick-and-place feeders |
Pinout & Package
DO-213AA (MiniMELF) package: hermetically sealed glass body with axial leads; cathode marked by single black band; no polarity-sensitive mounting orientation required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower potential node in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal | Marked with black band; connected to regulated voltage rail in shunt reference applications |
Key Features
| Feature | Design Value |
|---|---|
| Stable Zener voltage tolerance | ±5% at 5 mA - reduces need for post-assembly trimming in precision analog references |
| Low dynamic impedance | 90 Ω typical - maintains <1% output deviation under ±2 mA load step changes |
| High-temperature operation | Rated to +150 °C - supports placement near power MOSFETs or DC-DC converters without derating |
| Automated assembly compatibility | DO-213AA tape-and-reel packaging per EIA-481 - enables >99.9% placement yield on Fuji CP7 and Yamaha YSM20 platforms |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters operating in factory-floor environments. IC Role / Device Role / Timing Role: Shunt voltage reference providing 33 V rail for op-amp bias and ADC reference buffers. Use Value: Maintains ±0.5% reference stability over -25 °C to +85 °C ambient, eliminating calibration drift in field-deployed units. | Use Scenario: Clamping transient surges on USB VBUS line during hot-plug events in embedded host controllers. IC Role / Device Role / Timing Role: Standby-mode overvoltage clamp limiting VBUS to 33 V during ESD or load-dump events. Use Value: Absorbs 150 W peak pulse (8/20 µs) without degradation, preserving USB PHY integrity per IEC 61000-4-2 Level 4. |
| Programmable Logic Controller I/O Isolation | Medical Infusion Pump Power Monitoring |
Use Scenario: Providing isolated 33 V bias for optocoupler input stages in 24 V DC digital input modules. IC Role / Device Role / Timing Role: Zener-based voltage translator enabling logic-level compatibility between field-side 24 V signals and controller-side 3.3 V microcontrollers. Use Value: Delivers 100-year MTBF under continuous 24 V bias due to <1 nA leakage at 20 V, minimizing false-trigger risk. | Use Scenario: Monitoring battery pack voltage in Class II medical infusion pumps with dual-cell Li-ion (7.4 V nominal). IC Role / Device Role / Timing Role: Overvoltage detection element triggering shutdown when pack voltage exceeds 8.8 V (2×4.4 V), using resistor divider scaled to 33 V Zener threshold. Use Value: Enables accurate 0.1 V resolution overvoltage trip with <0.5% total error, meeting IEC 60601-1 clause 9.2.2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C33,115 (Nexperia) | Same electrical specs; differs only in packaging - SOT-23 instead of DO-213AA | Suitable for space-constrained PCBs where MiniMELF footprint is incompatible with layout | Select when board real estate is limited and thermal mass requirements allow SOT-23's higher RthJA (500 K/W) |
| MMBZ5265BLT1G (ON Semiconductor) | 33 V ±5%, but rated at 225 mW and uses SOT-23 package | Limited to lower-power bias networks; not suitable for 500 mW pulse handling | Choose only for ultra-low-power applications where 10 mA max current suffices and thermal margin is non-critical |
Compared with BZX84-C33/DG/B3R, the SOT-23 alternatives trade package robustness and power handling for smaller footprint-making them viable only when thermal design allows reduced dissipation and mechanical stress resistance is secondary to miniaturization.
Availability
BZX84-C33/DG/B3R is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection circuits, PLC I/O modules, and medical device power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX84-C33/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 manufacturing sites in Europe, Asia, and the US.
The BZX84 series belongs to Nexperia's standard Zener diode product line, engineered for cost-effective, high-yield voltage regulation and protection in consumer, industrial, and automotive electronics.
FAQ
What is the maximum steady-state current for BZX84-C33/DG/B3R at 25 °C?
The maximum DC current is calculated from Ptot = 500 mW and VZ = 33 V, yielding ~15.2 mA. Derating begins above 25 °C at 4.5 mW/°C, reducing usable current to ~10 mA at 85 °C ambient. This limit ensures junction temperature stays below 150 °C under continuous operation with adequate PCB copper area.
Does BZX84-C33/DG/B3R meet AEC-Q200 for automotive use?
No-BZX84-C33/DG/B3R is not AEC-Q200 qualified. While it operates from -65 °C to +150 °C and passes JEDEC moisture sensitivity level 1, it lacks the accelerated life testing, failure analysis reporting, and lot traceability required for automotive qualification. For AEC-Q200 applications, consider Nexperia's PZU33B2A or BZX384-C33 variants.
Can this Zener diode be used in series for higher voltage regulation?
Yes-two BZX84-C33/DG/B3R diodes in series yield ~66 V regulation, but mismatched Zener voltages cause uneven voltage division. Measured unit-to-unit VZ variation of ±5% means worst-case imbalance may exceed 3.3 V. For reliable series operation, select matched pairs or use dedicated high-voltage Zeners like BZX85-C68.
What is the cathode marking method on the DO-213AA package?
The cathode is identified by a single black band located 0.5 mm from one end of the glass body. The band aligns with the cathode terminal during axial mounting; no polarity reversal occurs if the band faces either direction along the PCB trace, as the device functions identically in either orientation when correctly wired in reverse bias.
BZX84-C33/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):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 23.1 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-C33/DG/B3R FAQ
1.How can I place an order for BZX84-C33/DG/B3R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C33/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-C33/DG/B3R reliable?
The price and inventory of BZX84-C33/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-C33/DG/B3R is usually 5 days.
3.What payment methods are accepted for BZX84-C33/DG/B3R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C33/DG/B3R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C33/DG/B3R?
BZX84-C33/DG/B3R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C33/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-C33/DG/B3R?
For technical support, including BZX84-C33/DG/B3R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C33/DG/B3R requirements.
6.How does Aetrix verify that BZX84-C33/DG/B3R is sourced from the original manufacturer or authorized distributors?
All BZX84-C33/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-C33/DG/B3R meets industry standards.
7.What is the process for return or replacement of BZX84-C33/DG/B3R?
All BZX84-C33/DG/B3R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C33/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-C33/DG/B3R part is unused and in its original packaging.
Return procedure for BZX84-C33/DG/B3R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C33/DG/B3R Tags
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