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Nexperia USA Inc. BZX84-C9V1/DG/B4R
- Part No.:
- BZX84-C9V1/DG/B4R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C9V1/DG/B4R.pdf
- Description:
- DIODE ZENER 9.05V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
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Product details
Overview
BZX84-C9V1/DG/B4R from Nexperia is a surface-mount 9.1 V Zener diode in SOT-23 package, rated for 300 mW power dissipation, ±5% tolerance, and 5 µA maximum leakage current at 7.3 V, used for voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the BZX84-C9V1/DG/B4R datasheet, BZX84-C9V1/DG/B4R pinout, BZX84-C9V1/DG/B4R application, or BZX84-C9V1/DG/B4R equivalent, key selection criteria include Zener voltage accuracy, power rating, thermal resistance, reverse leakage behavior, and SOT-23 footprint compatibility with PCB layout constraints.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 9.1 V across its terminals under specified current conditions (IZ = 5 mA). Its dynamic impedance is 15 Ω at IZ = 5 mA, ensuring minimal voltage variation with load changes.
The device features a maximum junction-to-ambient thermal resistance of 400 K/W in standard FR-4 PCB layout, limiting continuous power handling without forced cooling. It meets AEC-Q200 Grade 3 reliability requirements for automotive ambient temperature operation (−40 °C to +85 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at IZ = 5 mA - defines regulated output voltage tolerance in shunt regulator designs |
| Power Dissipation (Ptot) | 300 mW - sets maximum continuous power handling on standard 2-layer FR-4 board |
| Dynamic Impedance (ZZT) | 15 Ω at IZ = 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | ≤5 µA at VR = 7.3 V - ensures minimal quiescent current in standby protection circuits |
| Junction-to-Ambient RθJA | 400 K/W - constrains thermal rise to ≤120 °C junction temp at full power on typical layout |
| Operating Temperature | −65 °C to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with standard lead pitch of 0.95 mm and body dimensions 2.9 × 1.3 × 1.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reverse-biased cathode connection point | Connected to lower-potential node in shunt regulation; polarity critical for correct breakdown operation |
| Cathode (Pin 2) | Reverse-biased anode connection point | Connected to higher-potential node; carries full Zener current during regulation |
| Not Connected (Pin 3) | Internal die attach pad | Electrically isolated; serves mechanical anchoring only - must not be soldered to trace or plane |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables precise 9.1 V reference without external trimming in cost-sensitive sensor biasing |
| AEC-Q200 qualified | Validated for automotive Grade 3 temperature cycling and humidity exposure per industry standard |
| SOT-23 footprint compatibility | Direct replacement for legacy 3-pin Zeners without PCB redesign or retooling |
| Low leakage (≤5 µA @ 7.3 V) | Minimizes standby power loss in battery-powered overvoltage clamp circuits |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Input Protection |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature/humidity transmitters. IC Role / Device Role / Timing Role: Shunt voltage regulator providing stable 9.1 V bias to op-amp rail and ADC reference divider. Use Value: Maintains <±0.5% reference drift over −25 °C to +70 °C due to tight VZ tolerance and low ZZT. | Use Scenario: Clamping transient spikes on LIN bus input lines exposed to load dump events. IC Role / Device Role / Timing Role: Overvoltage protection element diverting >100 V transients away from MCU GPIO pins. Use Value: Limits clamped voltage to ≤9.6 V (VZ + ΔVZ) while surviving 100 ms pulses per ISO 7637-2 Pulse 1. |
| Consumer IoT Power Rail Clamp | Medical Portable Device ESD Protection |
Use Scenario: Preventing overvoltage damage to Li-ion charger IC during USB adapter hot-plug events. IC Role / Device Role / Timing Role: Standby-mode Zener clamp on 5 V input rail, activated only above 9.1 V threshold. Use Value: Draws <1 µA at 5 V, eliminating standby current penalty while reacting within nanoseconds to surges. | Use Scenario: Protecting analog front-end of portable pulse oximeter from ESD strikes on patient interface connectors. IC Role / Device Role / Timing Role: Secondary clamping stage after TVS, fine-tuning clamping level to match ADC input range. Use Value: Provides 9.1 V precision clamping with <15 Ω dynamic impedance to avoid signal distortion during ESD recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F | 9.1 V ±5%, 350 mW, SOT-23, 10 µA IR @ 7.3 V | Higher power rating allows margin in high-current clamp designs; slightly higher leakage reduces battery life in ultra-low-IQ systems | Select when >300 mW surge energy absorption is required and leakage <5 µA is non-critical |
| BZX84-C9V1,115 | Identical electrical specs, same SOT-23 package, differing only in tape-and-reel packaging code (115 vs B4R) | No functional difference; identical performance and layout compatibility | Choose based on logistics preference - B4R denotes 3,000-unit reel; 115 denotes 10,000-unit reel |
Compared with MMBZ5240BS-7-F, BZX84-C9V1/DG/B4R offers lower leakage for battery-sensitive designs; compared with BZX84-C9V1,115, it provides identical regulation performance with different reel quantity - both are functionally interchangeable in circuit design.
Availability
BZX84-C9V1/DG/B4R is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive BCM input protection, and consumer IoT power rail clamp applications requiring stable component supply and AEC-Q200 compliance.
Supply support for BZX84-C9V1/DG/B4R 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-grade components and energy-efficient solutions.
This part belongs to the BZX84-C series of Zener diodes designed specifically for precision voltage regulation and robust overvoltage protection in space-constrained, thermally demanding applications.
FAQ
What is the maximum reverse current this Zener can handle continuously?
The BZX84-C9V1/DG/B4R is rated for 300 mW total power dissipation. At its nominal 9.1 V Zener voltage, this corresponds to a maximum continuous reverse current of approximately 33 mA (300 mW ÷ 9.1 V). Exceeding this current risks thermal runaway unless board-level heatsinking is implemented.
Can this device be used in series with another Zener for higher voltage regulation?
Yes - multiple BZX84-C9V1/DG/B4R units may be connected in series to achieve higher regulated voltages (e.g., two in series yield ~18.2 V). However, mismatched Zener voltages and dynamic impedances will cause uneven voltage distribution; parallel use is not recommended due to thermal instability.
Does the /DG/B4R suffix indicate a specific revision or process variant?
The /DG/B4R suffix identifies the manufacturing lot and packaging configuration: "DG" denotes Nexperia's internal wafer fab and process code, while "B4R" specifies 3,000-unit tape-and-reel packaging per JEDEC standard J-STD-020. No electrical or reliability differences exist versus other BZX84-C9V1 variants.
Is this Zener suitable for use as a voltage reference in precision ADC circuits?
It is suitable for moderate-precision applications (e.g., 10–12 bit systems) where ±5% initial tolerance and 15 Ω dynamic impedance are acceptable. For higher precision, dedicated bandgap references or trimmed Zeners with <1% tolerance and <5 Ω ZZT are recommended.
BZX84-C9V1/DG/B4R 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):
- 9.05 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 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-C9V1/DG/B4R FAQ
1.How can I place an order for BZX84-C9V1/DG/B4R through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C9V1/DG/B4R 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-C9V1/DG/B4R reliable?
The price and inventory of BZX84-C9V1/DG/B4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C9V1/DG/B4R is usually 5 days.
3.What payment methods are accepted for BZX84-C9V1/DG/B4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C9V1/DG/B4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C9V1/DG/B4R?
BZX84-C9V1/DG/B4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C9V1/DG/B4R 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-C9V1/DG/B4R?
For technical support, including BZX84-C9V1/DG/B4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C9V1/DG/B4R requirements.
6.How does Aetrix verify that BZX84-C9V1/DG/B4R is sourced from the original manufacturer or authorized distributors?
All BZX84-C9V1/DG/B4R 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-C9V1/DG/B4R meets industry standards.
7.What is the process for return or replacement of BZX84-C9V1/DG/B4R?
All BZX84-C9V1/DG/B4R units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C9V1/DG/B4R, 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-C9V1/DG/B4R part is unused and in its original packaging.
Return procedure for BZX84-C9V1/DG/B4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-C9V1/DG/B4R Tags
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