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Taiwan Semiconductor Corporation BZX84C9V1
- Part No.:
- BZX84C9V1
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C9V1.pdf
- Description:
- DIODE ZENER 9.1V 300MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,632
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Product details
Overview
BZX84C9V1 from Taiwan Semiconductor is a surface-mount Zener diode engineered for precision voltage regulation and reference applications, with a nominal Zener voltage of 9.1 V (min 8.5 V, max 9.6 V), 300 mW power dissipation, 15 Ω typical Zener impedance at 5 mA test current, and operating junction temperature range of –65 °C to +150 °C. It serves as a stable voltage clamp in low-power DC/DC converters and LED lighting drivers.
For engineers reviewing the BZX84C9V1 datasheet, BZX84C9V1 pinout, BZX84C9V1 application, or BZX84C9V1 equivalent, key selection criteria include its SOT-23 package compatibility, ±5% voltage tolerance at 9.1 V, 0.5 µA maximum leakage at 6.0 V, and thermal resistance of 417 °C/W - critical for compact, thermally constrained PCB layouts.
Technical Context
The BZX84C9V1 operates as a single-die, silicon planar Zener diode optimized for reverse-biased breakdown regulation. Its electrical behavior is defined by a 5 mA test current (IZT), 15 Ω dynamic impedance (ZZT), and a positive temperature coefficient of +3.8 mV/°C - indicating voltage increases with rising junction temperature.
It complies with J-STD-020 moisture sensitivity Level 1 and JESD 201 Class 1A whisker resistance, supporting lead-free reflow assembly. The device exhibits 0.9 V forward voltage at 10 mA and maintains stable regulation across –65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal (8.5–9.6 V range); defines precise clamping threshold for overvoltage protection and reference circuits |
| Power Dissipation (PD) | 300 mW at 25 °C ambient; derates linearly above 25 °C per 417 °C/W thermal resistance |
| Zener Impedance (ZZT) | 15 Ω typical at 5 mA; ensures minimal output voltage variation under load current changes |
| Leakage Current (IR) | 0.5 µA max at 6.0 V; guarantees low standby power loss in battery-powered voltage monitor circuits |
| Temperature Coefficient | +3.8 mV/°C; enables predictable voltage drift compensation in temperature-stable references |
| Junction-to-Ambient RθJA | 417 °C/W; informs thermal design margin for SOT-23 layout on standard FR-4 PCBs |
Pinout & Package
Package: SOT-23 - three-terminal, surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated molding compound, and approximate weight of 8 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation configuration |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; determines regulated output voltage at cathode relative to anode |
| Collector / Heat Sink (Pin 3) | Internal die connection | Electrically tied to cathode in standard SOT-23 Zener configuration; provides primary thermal path |
Key Features
| Feature | Design Value |
|---|---|
| RoHS & Halogen-Free Compliance | Meets IEC 61249-2-21 and EU RoHS directives; supports environmentally compliant manufacturing |
| Moisture Sensitivity Level | Level 1 per J-STD-020; eliminates bake requirements before reflow soldering |
| Whisker Resistance | Passes JESD 201 Class 1A testing; prevents tin whisker growth in long-life industrial deployments |
| Automated Assembly Suitability | Optimized lead geometry and coplanarity for high-yield pick-and-place and reflow processes |
Applications
| LED Lighting Driver Reference | USB-C Adapter Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in constant-current LED driver ICs for residential and commercial luminaires. IC Role / Device Role / Timing Role: Zener reference element providing 9.1 V setpoint to error amplifier input. Use Value: Tight 8.5–9.6 V tolerance ensures consistent LED brightness across production batches and temperature ranges. | Use Scenario: Protecting secondary-side controller ICs from transient overvoltage during USB-C PD negotiation faults. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to ≤9.6 V during 100 ns–1 µs surges. Use Value: 0.5 µA leakage at 6 V minimizes quiescent current draw while maintaining fast response via low ZZT. |
| On-Board DC/DC Converter Feedback | Industrial Sensor Signal Conditioning |
Use Scenario: Setting output voltage in isolated 5 V → 3.3 V flyback converters for microcontroller power rails. IC Role / Device Role / Timing Role: Precision voltage reference in optocoupler feedback loop. Use Value: +3.8 mV/°C TC allows predictable compensation when paired with NTC thermistors in closed-loop thermal management. | Use Scenario: Providing stable bias voltage for analog front-end op-amps in 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference source for ADC reference buffers. Use Value: 15 Ω ZZT ensures <10 mV ripple rejection at 10 kHz sensor signal frequencies without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5240BS-7-F | 9.1 V nominal, 225 mW PD, 30 Ω ZZT, SOT-23 package | Lower power rating and higher impedance reduce regulation stability under dynamic loads | Prefer BZX84C9V1 where >300 mW surge handling or <20 Ω ZZT is required |
| 1SMA5920BT3G | 9.1 V nominal, 1.5 W PD, 7 Ω ZZT, SMA package (larger footprint) | Higher power and lower impedance suit high-current clamping but require PCB area increase | Select BZX84C9V1 for space-constrained SOT-23 designs needing 300 mW balance |
Compared with MMBZ5240BS-7-F and 1SMA5920BT3G, the BZX84C9V1 delivers optimal trade-off between SOT-23 board area, 300 mW continuous dissipation, and 15 Ω regulation impedance - making it ideal for compact, thermally managed voltage reference nodes in consumer and industrial power supplies.
Availability
BZX84C9V1 is available at Aetrix Electronics and suitable for LED lighting drivers, USB-C adapter protection circuits, and on-board DC/DC converter feedback networks requiring stable component supply and full traceability.
Supply support for BZX84C9V1 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, analog ICs, and protection components for industrial, automotive, and consumer markets.
The BZX84C9V1 belongs to TSC's BZX84C series of surface-mount Zener diodes, designed specifically for high-reliability, automated-assembly voltage regulation in space-constrained power management subsystems.
FAQ
What is the Zener voltage tolerance of BZX84C9V1 at 25°C?
The BZX84C9V1 has a nominal Zener voltage of 9.1 V with a guaranteed range of 8.5 V to 9.6 V at 5 mA test current and 25°C ambient. This ±5.5% tolerance reflects the device's specification under standard test conditions and is confirmed in the Electrical Specifications table of the official datasheet.
Does BZX84C9V1 support lead-free reflow soldering?
Yes, the BZX84C9V1 supports lead-free reflow soldering. Its matte tin-plated leads comply with J-STD-002 solderability standards, and its moisture sensitivity level is rated Level 1 per J-STD-020 - meaning no baking is required prior to assembly.
What is the maximum leakage current for BZX84C9V1, and at what voltage is it specified?
The BZX84C9V1 has a maximum leakage current of 0.5 µA, specified at a reverse voltage of 6.0 V (IZ = 0.5 µA @ VR = 6.0 V). This value is critical for low-power monitoring circuits where standby current must remain below 1 µA.
Can BZX84C9V1 be used in place of BZX84C8V2 or BZX84C10 in existing designs?
Substitution of BZX84C9V1 for BZX84C8V2 or BZX84C10 requires circuit validation due to differences in nominal Zener voltage (9.1 V vs. 8.2 V or 10 V), temperature coefficient (+3.8 mV/°C vs. +3.2 mV/°C or +4.5 mV/°C), and leakage characteristics. The BZX84C9V1 is not a drop-in replacement without recalculating feedback network values.
What is the thermal resistance (RθJA) of BZX84C9V1, and how does it affect power derating?
The BZX84C9V1 has a junction-to-ambient thermal resistance of 417 °C/W. At ambient temperatures above 25°C, its usable power dissipation must be linearly derated - for example, to ~225 mW at 80°C ambient - to maintain junction temperature ≤150°C, as defined in the Absolute Maximum Ratings table.
BZX84C9V1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±6.04%
- Power - Max:
- 300 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23
BZX84C9V1 FAQ
1.How can I place an order for BZX84C9V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C9V1 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 BZX84C9V1 reliable?
The price and inventory of BZX84C9V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C9V1 is usually 5 days.
3.What payment methods are accepted for BZX84C9V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C9V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C9V1?
BZX84C9V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C9V1 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 BZX84C9V1?
For technical support, including BZX84C9V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C9V1 requirements.
6.How does Aetrix verify that BZX84C9V1 is sourced from the original manufacturer or authorized distributors?
All BZX84C9V1 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 BZX84C9V1 meets industry standards.
7.What is the process for return or replacement of BZX84C9V1?
All BZX84C9V1 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C9V1, 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 BZX84C9V1 part is unused and in its original packaging.
Return procedure for BZX84C9V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C9V1 Tags
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MM5Z5V1ST1G
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