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onsemi BZX84C5V1_D87Z
- Part No.:
- BZX84C5V1_D87Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C5V1_D87Z.pdf
- Description:
- DIODE ZENER 5.1V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,356
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Product details
Overview
BZX84C5V1_D87Z from ON Semiconductor (formerly Fairchild) is a 5.1 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with 60 Ω dynamic impedance at 5 mA test current and 2 µA maximum reverse leakage at 2.0 V. It provides precision voltage regulation in low-power biasing and reference circuits.
For engineers reviewing the BZX84C5V1_D87Z datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.1 V nominal Zener voltage, ±5% tolerance, 225 pF capacitance at 0 V, -2.7 mV/°C temperature coefficient, and SOT-23 package compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across a load under varying current conditions. Its design supports low-noise voltage reference generation and overvoltage clamping in analog signal chains and power supply feedback paths.
The device exhibits a negative temperature coefficient of -2.7 mV/°C at 5 mA, enabling predictable thermal drift compensation in precision references. Its 225 pF junction capacitance at 0 V and 2 µA IR at VR = 2.0 V define its AC response and leakage-limited high-impedance node performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.8–5.4 V at IZ = 5 mA; ensures stable 5.1 V reference within ±5% tolerance for feedback and bias networks |
| Zener Impedance (ZZ) | 60 Ω max at IZ = 5 mA; limits voltage variation under load current changes in regulation circuits |
| Power Dissipation (PD) | 250 mW at TA = 25°C; defines maximum continuous DC power handling on standard FR-4 PCB |
| Reverse Leakage (IR) | 2 µA max at VR = 2.0 V; minimizes error current in high-impedance reference nodes |
| Junction Capacitance (CJ) | 225 pF at VR = 0 V, f = 1 MHz; impacts high-frequency noise coupling and filter cutoff in RF-adjacent designs |
| Temp. Coefficient (dVZ/dT) | -2.7 mV/°C at IZ = 5 mA; enables thermal drift modeling for accuracy-critical voltage references |
Pinout & Package
SOT-23 surface-mount package with cathode-anode-cathode terminal arrangement (pin 1 = anode, pin 2 = cathode, pin 3 = cathode). Standard 3-pin plastic case with gull-wing leads, footprint compatible with JEDEC TO-236AB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential side in reverse-bias operation; required for proper Zener breakdown orientation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential side; carries regulated output voltage in shunt regulator configuration |
| Cathode (Pin 3) | Thermal and electrical tie | Internally bonded to Pin 2; improves thermal dissipation and reduces lead inductance in high-frequency clamping |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without external trimming in cost-sensitive consumer and industrial power supplies |
| 250 mW power rating | Supports robust operation in space-constrained SOT-23 layouts without forced air or heatsinking |
| Low 2 µA reverse leakage at 2 V | Maintains accuracy in high-resistance divider networks used for microcontroller ADC references |
| -2.7 mV/°C tempco | Allows predictable drift compensation in temperature-stable reference designs up to 125°C ambient |
| 225 pF junction capacitance | Permits use in moderate-speed transient suppression and low-bandwidth voltage clamping applications |
Applications
| Microcontroller Voltage Reference | USB Port Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 5.1 V reference for internal ADC or brown-out detection circuitry in battery-powered MCU systems. IC Role / Device Role / Timing Role: Shunt voltage reference diode regulating input to precision bandgap or comparator input. Use Value: Delivers ±5% accuracy and -2.7 mV/°C drift control, enabling reliable ADC calibration across -40°C to +85°C operating range. | Use Scenario: Clamping induced transients on USB VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Low-capacitance Zener clamp protecting downstream USB PHY ICs from >6 V surges. Use Value: 225 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 data lines while clamping at 5.4 V peak. |
| Low-Power Sensor Biasing | Op-Amp Feedback Stabilization |
Use Scenario: Supplying bias current to analog sensor elements (e.g., thermistors, RTDs) in IoT node front-ends. IC Role / Device Role / Timing Role: Constant-voltage source establishing known excitation potential across resistive sensors. Use Value: 60 Ω Zener impedance ensures <10 mV deviation under ±1 mA sensor current variation, improving measurement linearity. | Use Scenario: Setting precise gain in inverting op-amp configurations where feedback node requires stable reference voltage. IC Role / Device Role / Timing Role: Low-leakage shunt reference stabilizing virtual ground point in high-gain amplifier stages. Use Value: 2 µA max reverse leakage prevents input offset errors in femtoampere-input op-amps used in precision instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5221BS-7-F | Same 5.1 V nominal, ±5% tolerance, but 350 mW PD, 17 Ω ZZ, 200 pF CJ | Higher power and lower impedance suit higher-current regulation; tighter thermal resistance allows better stability at elevated ambient | Select when >200 mW dissipation or <30 Ω impedance is required; verify SOT-23 pinout match |
| BZX84-C5V1,115 | Identical electrical specs and SOT-23 package; differs only in packaging format (tape-and-reel vs. bulk) and manufacturer marking | No functional difference; fully interchangeable in all circuit roles and layout footprints | Preferred for high-volume automated assembly where tape-and-reel delivery is required |
Compared with MMBZ5221BS-7-F and BZX84-C5V1,115, the BZX84C5V1_D87Z offers identical core regulation performance at standard 250 mW rating, making it optimal for legacy designs and cost-sensitive applications where 350 mW headroom is unnecessary.
Availability
BZX84C5V1_D87Z is available at Aetrix Electronics and suitable for microcontroller reference, USB protection, sensor biasing, and op-amp stabilization requiring stable component supply and long-term obsolescence management.
Supply support for BZX84C5V1_D87Z 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The BZX84 series belongs to ON Semiconductor's general-purpose Zener diode product line, designed specifically for voltage regulation, reference, and overvoltage protection in compact, cost-optimized electronic systems.
FAQ
What is the nominal Zener voltage of BZX84C5V1_D87Z and its tolerance?
The BZX84C5V1_D87Z has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 4.8 V and 5.4 V when tested at 5 mA Zener current. This specification is confirmed in the Fairchild/ON Semiconductor datasheet Rev. 1.10, Table on page 2. The BZX84C5V1_D87Z maintains this tolerance across its full operating temperature range.
What is the maximum power dissipation rating for BZX84C5V1_D87Z?
The BZX84C5V1_D87Z is rated for 250 mW power dissipation at an ambient temperature of 25°C when mounted on a standard FR-4 PCB (76.2 mm × 114.3 mm). Derating is required above 25°C per the 465°C/W junction-to-ambient thermal resistance. This value is specified in the Absolute Maximum Ratings table on page 1 of the official datasheet for BZX84C5V1_D87Z.
Does BZX84C5V1_D87Z have a specified junction capacitance, and at what condition?
Yes, the BZX84C5V1_D87Z has a typical junction capacitance of 225 pF measured at zero applied reverse voltage (VR = 0 V) and frequency of 1.0 MHz. This parameter is documented in the Electrical Characteristics table on page 3 of the datasheet and directly affects high-frequency noise filtering and signal integrity in clamping applications.
What is the temperature coefficient of BZX84C5V1_D87Z, and how does it affect performance?
The BZX84C5V1_D87Z has a temperature coefficient of -2.7 mV/°C at 5 mA Zener current, indicating its breakdown voltage decreases by approximately 2.7 mV per degree Celsius rise in junction temperature. This characteristic is critical for predicting voltage drift in temperature-varying environments and is specified in the same datasheet table that lists capacitance and leakage for BZX84C5V1_D87Z.
Is BZX84C5V1_D87Z compatible with standard SOT-23 footprints, and what are its pin assignments?
Yes, BZX84C5V1_D87Z uses the industry-standard SOT-23 package with pin 1 as anode, pin 2 as cathode, and pin 3 as cathode (dual-cathode configuration). Its mechanical dimensions and land pattern match JEDEC TO-236AB specifications, ensuring drop-in compatibility with existing SOT-23 layouts. This pinout is verified in the package outline drawing referenced in the BZX84C5V1_D87Z datasheet.
BZX84C5V1_D87Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±6%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BZX84C5V1_D87Z FAQ
1.How can I place an order for BZX84C5V1_D87Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C5V1_D87Z 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 BZX84C5V1_D87Z reliable?
The price and inventory of BZX84C5V1_D87Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C5V1_D87Z is usually 5 days.
3.What payment methods are accepted for BZX84C5V1_D87Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C5V1_D87Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C5V1_D87Z?
BZX84C5V1_D87Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C5V1_D87Z 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 BZX84C5V1_D87Z?
For technical support, including BZX84C5V1_D87Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C5V1_D87Z requirements.
6.How does Aetrix verify that BZX84C5V1_D87Z is sourced from the original manufacturer or authorized distributors?
All BZX84C5V1_D87Z 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 BZX84C5V1_D87Z meets industry standards.
7.What is the process for return or replacement of BZX84C5V1_D87Z?
All BZX84C5V1_D87Z units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C5V1_D87Z, 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 BZX84C5V1_D87Z part is unused and in its original packaging.
Return procedure for BZX84C5V1_D87Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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