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onsemi BZX84C22_D87Z
- Part No.:
- BZX84C22_D87Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C22_D87Z.pdf
- Description:
- DIODE ZENER 22V 350MW SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,751
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Product details
Overview
BZX84C22_D87Z from ON Semiconductor (formerly Fairchild) is a 22 V ±5% tolerance surface-mount Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C ambient, with typical zener impedance of 25 Ω at 20 mA and reverse leakage current ≤50 nA at 15.4 V, used for voltage regulation and overvoltage protection in low-power DC rails.
For engineers reviewing the BZX84C22_D87Z datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage tolerance, dynamic impedance at specified test current, thermal resistance (RJA = 465°C/W), maximum reverse leakage, and SOT-23 footprint compatibility in space-constrained designs.
Technical Context
The BZX84C22_D87Z operates as a silicon planar epitaxial Zener diode optimized for stable voltage reference and clamping in bias networks, feedback loops, and ESD-sensitive analog front-ends. It exhibits a positive temperature coefficient of +16.4 mV/°C at 5 mA and capacitance of 85 pF at 0 V reverse bias, 1 MHz.
Designed for operation within -55°C to +150°C junction temperature range, it supports steady-state DC regulation only - pulsed or low-duty-cycle applications require consultation with ON Semiconductor per absolute maximum ratings guidance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.8–23.4 V at IZ = 20 mA; defines precise clamping threshold for 22 V nominal rail protection |
| Tolerance | ±5%; ensures voltage accuracy within 1.1 V window for reliable reference stability |
| Zener Impedance (ZZ) | 25 Ω max at IZ = 20 mA; determines regulation stiffness under load transients |
| Reverse Leakage (IR) | ≤50 nA at VR = 15.4 V; minimizes quiescent current in high-impedance sensing paths |
| Power Dissipation (PD) | 250 mW at TA = 25°C; sets maximum continuous DC power handling on FR-4 PCB |
| Junction-to-Ambient RJA | 465°C/W; indicates thermal derating slope - power must reduce by ~0.54 mW/°C above 25°C ambient |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with cathode-marked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal | Marked pin; connected to regulated/higher-potential rail during clamping |
| Collector (SOT-23 pin 3) | Internal die attachment point | Electrically tied to cathode; serves as primary thermal path to PCB pad |
Key Features
| Feature | Design Value |
|---|---|
| ±5% voltage tolerance | Enables tight regulation without post-production trimming in cost-sensitive consumer power supplies |
| Low leakage (≤50 nA) | Preserves signal integrity in high-impedance voltage divider networks and sensor biasing |
| SOT-23 footprint | Supports automated placement and reflow in compact PCB layouts with 2.9 mm × 1.3 mm area |
| 150°C max junction temperature | Allows operation in thermally demanding environments such as automotive cabin modules and industrial controllers |
Applications
| Power Supply Rail Clamping | Reference Voltage Generation |
|---|---|
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage on 24 V industrial bus interfaces. IC Role / Device Role / Timing Role: Zener clamping element shunting excess energy to ground when bus voltage exceeds 22 V. Use Value: Limits peak stress to <24 V using BZX84C22_D87Z's 23.4 V max VZ, preventing latch-up in 3.3 V logic inputs. | Use Scenario: Providing stable 22 V reference for ADC input scaling in battery-powered data loggers. IC Role / Device Role / Timing Role: Passive voltage reference source in resistive divider network feeding precision SAR ADC. Use Value: Delivers ±5% accuracy and <25 Ω dynamic impedance, minimizing gain error drift across temperature. |
| ESD Protection Network | Feedback Loop Stabilization |
Use Scenario: Secondary clamping stage in USB-C port protection circuit alongside TVS diode. IC Role / Device Role / Timing Role: Low-leakage Zener absorbing residual overshoot after primary TVS conduction. Use Value: ≤50 nA leakage at 15.4 V ensures no measurable loading on 5 V VBUS sense line during normal operation. | Use Scenario: Setting upper threshold in op-amp comparator circuit for overvoltage alarm in telecom power shelf. IC Role / Device Role / Timing Role: Precision voltage reference defining trip point for hysteresis-based monitoring. Use Value: +16.4 mV/°C tempco enables predictable threshold shift, simplifying compensation in wide-temperature deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5247BS-7-F | 22 V ±5%, 200 mW rating, 30 Ω ZZ at 20 mA, SOT-323 package | Lower power rating and higher impedance; smaller footprint but reduced thermal margin | Select when board space is critical and power dissipation remains <150 mW |
| 1N4748A | 22 V ±5%, 1 W rating, 25 Ω ZZ, DO-41 through-hole package | Higher power handling but incompatible with SMT assembly; requires PCB hole drilling | Select for prototyping or high-reliability through-hole designs where thermal mass improves surge robustness |
Compared with MMBZ5247BS-7-F and 1N4748A, the BZX84C22_D87Z offers optimal balance of SMT compatibility, 250 mW power capability, and 25 Ω impedance - making it preferred for production-grade 22 V regulation in space-constrained, reflow-soldered assemblies.
Availability
BZX84C22_D87Z is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX84C22_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 manufacturer specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The BZX84 series belongs to ON Semiconductor's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in cost-sensitive, high-volume consumer and industrial electronics.
FAQ
What is the exact zener voltage range for BZX84C22_D87Z at 20 mA test current?
The BZX84C22_D87Z has a guaranteed zener voltage range of 20.8 V to 23.4 V when tested at IZ = 20 mA and TA = 25°C, per the official ON Semiconductor datasheet Rev. 1.10. This 2.6 V span reflects its ±5% tolerance specification and directly defines its usable clamping window in circuit design.
Does BZX84C22_D87Z support operation above 100°C ambient temperature?
Yes, the BZX84C22_D87Z is rated for junction temperatures up to +150°C and storage from -55°C to +150°C. However, its power dissipation must be derated linearly above 25°C ambient using RJA = 465°C/W - for example, at 85°C ambient, max allowable PD drops to ~135 mW. Thermal design must ensure TJ stays within limits under worst-case load.
What is the forward voltage of BZX84C22_D87Z and how does it affect circuit behavior?
The forward voltage of BZX84C22_D87Z is ≤0.9 V at IF = 10 mA, consistent across the BZX84 series. This low VF ensures minimal voltage drop when used in forward-biased configurations (e.g., polarity protection), preserving headroom in low-voltage systems without compromising BZX84C22_D87Z's primary Zener function.
Can BZX84C22_D87Z be used as a direct replacement for BZX84C22LT1G?
No - while both are 22 V SOT-23 Zeners, BZX84C22LT1G (onsemi) uses different marking, packaging, and qualification standards. BZX84C22_D87Z is a Fairchild/ON legacy part with documented RJA = 465°C/W and specific leakage/capacitance values. Substitution requires validation of thermal performance, board layout, and reliability requirements before deploying BZX84C22_D87Z.
What is the temperature coefficient of BZX84C22_D87Z and how does it impact voltage stability?
The BZX84C22_D87Z has a temperature coefficient of +16.4 mV/°C at IZ = 5 mA, meaning its zener voltage increases by approximately 16.4 mV per degree Celsius rise. This positive drift must be accounted for in precision reference designs - for instance, a 50°C rise adds ~0.82 V to nominal VZ, so system-level calibration or compensation may be needed when using BZX84C22_D87Z.
BZX84C22_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):
- 22 V
- Tolerance:
- ±6%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 55 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 15.4 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
BZX84C22_D87Z FAQ
1.How can I place an order for BZX84C22_D87Z through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C22_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 BZX84C22_D87Z reliable?
The price and inventory of BZX84C22_D87Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C22_D87Z is usually 5 days.
3.What payment methods are accepted for BZX84C22_D87Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C22_D87Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C22_D87Z?
BZX84C22_D87Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C22_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 BZX84C22_D87Z?
For technical support, including BZX84C22_D87Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C22_D87Z requirements.
6.How does Aetrix verify that BZX84C22_D87Z is sourced from the original manufacturer or authorized distributors?
All BZX84C22_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 BZX84C22_D87Z meets industry standards.
7.What is the process for return or replacement of BZX84C22_D87Z?
All BZX84C22_D87Z units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C22_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 BZX84C22_D87Z part is unused and in its original packaging.
Return procedure for BZX84C22_D87Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C22_D87Z Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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