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Nexperia USA Inc. BZX84-B22,215
- Part No.:
- BZX84-B22,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B22,215.pdf
- Description:
- DIODE ZENER 22V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,650
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Product details
Overview
BZX84-B22,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 22 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in DC power rails and sensor biasing circuits.
For engineers reviewing the BZX84-B22,215 datasheet, BZX84-B22,215 pinout, BZX84-B22,215 application, or BZX84-B22,215 equivalent, key selection considerations include Zener voltage tolerance (±2 %), differential resistance (250 Ω max at IZ = 5 mA), non-repetitive peak reverse current (1.25 A), thermal resistance (500 K/W junction-to-ambient), and SOT23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across its cathode-anode terminals when reverse-biased above its specified Zener voltage (21.6 V to 22.4 V). It exhibits a positive temperature coefficient of +15.4 mV/K at IZ = 5 mA, enabling predictable drift compensation in temperature-sensitive references.
Its 250 mW steady-state power rating is defined under FR4 PCB mounting conditions (single-sided 70 µm copper, tin-plated), while transient surge capability reaches 40 W for 100 µs pulses - supporting robustness against short-duration voltage spikes in industrial and automotive-adjacent subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 21.6 V to 22.4 V at IZ = 5 mA - defines regulated output voltage window under nominal bias |
| Differential Resistance (rdif) | ≤250 Ω at IZ = 5 mA - determines regulation stiffness and load-induced voltage deviation |
| Reverse Current (IR) | ≤0.05 µA at VR = 17.6 V - ensures minimal leakage below knee voltage in standby mode |
| Temperature Coefficient (SZ) | +15.4 mV/K at IZ = 5 mA - quantifies voltage drift per degree Celsius for thermal design margining |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets continuous thermal limit for board-level layout planning |
| Non-repetitive Peak Reverse Current (IZSM) | 1.25 A for tp = 100 µs - defines maximum single-event surge current handling without damage |
| Junction Temperature (Tj) | −65 °C to +150 °C - constrains operating envelope for reliability in extended-temperature environments |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint (3.0 mm × 1.4 mm × 1.1 mm), optimized for reflow and wave soldering per Nexperia's recommended land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-bias terminal; connects to lower-potential side of regulated node during normal operation |
| 2 | Not Connected (n.c.) | Internally unconnected lead - must remain floating; no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Regulated output terminal; connects to higher-potential side and serves as reference point for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation than ±5 % variants (BZX84-C22), reducing need for post-regulation trimming in mid-precision analog circuits |
| 250 mW power rating | Supports continuous regulation in space-constrained applications where heat sinking is impractical, such as portable instrumentation front-ends |
| 150 °C maximum junction temperature | Permits reliable operation in under-hood or enclosed industrial enclosures without derating below ambient +85 °C |
| SOT23 package compatibility | Ensures drop-in replacement in legacy designs using JEDEC-standard 3-lead SMD footprints, minimizing PCB redesign effort |
| 1.25 A non-repetitive surge rating | Provides immunity to ESD transients and switching noise spikes common in relay-driven or motor-control supply lines |
Applications
| Industrial Sensor Biasing | Low-Power Reference Supply |
|---|---|
Use Scenario: Providing stable 22 V bias to piezoresistive pressure sensors in factory-floor monitoring systems. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed excitation voltage independent of input rail variation. Use Value: Maintains sensor full-scale output accuracy within ±0.5 % over −40 °C to +85 °C ambient due to known +15.4 mV/K TC and low rdif. | Use Scenario: Generating precise 22 V reference for 12-bit ADCs in battery-powered data loggers. IC Role / Device Role / Timing Role: Passive voltage reference source feeding op-amp buffer stage prior to analog-to-digital conversion. Use Value: Delivers <0.1 % line regulation error across 24–28 V input range, enabled by ±2 % VZ tolerance and 250 Ω rdif. |
| Overvoltage Clamp Protection | Microcontroller I/O Protection |
Use Scenario: Clamping 24 V CAN bus power rail against load-dump transients in vehicle body control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting rail excursion to safe levels during 40 V/100 ms surges. Use Value: Absorbs up to 40 W peak power for 100 µs without failure, verified per IEC 61000-4-5 Level 3 testing requirements. | Use Scenario: Protecting 3.3 V GPIO pins of STM32 microcontrollers from accidental 24 V miswiring in industrial HMI panels. IC Role / Device Role / Timing Role: Reverse-biased Zener clamp diverting fault current away from MCU input structure. Use Value: Limits pin voltage to ≤22.4 V during fault, preventing oxide breakdown in 3.3 V I/O cells rated for 5 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5247BS-7-F | 22 V ±5 % tolerance; 200 mW Ptot; SOT23 package; 300 Ω rdif at 20 mA | Higher tolerance and lower power rating reduce regulation accuracy and thermal headroom in continuous-use scenarios | Select only when cost sensitivity outweighs precision and long-term stability requirements |
| Vishay BZX84-C22-TP | 22 V ±5 % tolerance; 300 mW Ptot; same SOT23 footprint; 250 Ω rdif at 5 mA | Looser tolerance increases reference uncertainty but higher Ptot supports higher average current loads | Prefer for high-current clamping where voltage accuracy is secondary to energy absorption capacity |
Compared with BZX84-B22,215, MMBZ5247BS-7-F trades voltage precision for broader availability and lower unit cost, while BZX84-C22-TP sacrifices tolerance control for enhanced thermal margin - making the BZX84-B22,215 optimal for applications demanding both tight regulation and moderate power handling in compact layouts.
Availability
BZX84-B22,215 is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power reference supplies, overvoltage clamp protection, and microcontroller I/O protection requiring stable component supply and consistent parametric performance across production batches.
Supply support for BZX84-B22,215 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-qualified and industrial-grade components.
The BZX84 series belongs to Nexperia's precision Zener regulator product line, engineered specifically for stable voltage reference and transient suppression in cost-sensitive, space-constrained applications across industrial automation and consumer electronics.
FAQ
What is the maximum continuous reverse current this diode can sustain at 22 V?
The BZX84-B22,215 is not rated for continuous reverse conduction at 22 V. Its maximum continuous reverse current is determined by its 250 mW power limit: at 22 V, that corresponds to approximately 11.4 mA (250 mW ÷ 22 V). Exceeding this current risks thermal runaway and permanent degradation.
Can this Zener diode be used in series with another to achieve higher regulated voltage?
Yes, multiple BZX84-B22,215 diodes may be connected in series to increase total Zener voltage, but each diode must carry identical current. Due to ±2 % tolerance, worst-case stacking error accumulates linearly - e.g., two diodes yield 43.2–44.8 V instead of ideal 44 V - requiring verification against system regulation margins.
Is Pin 2 truly unused, or does it serve a thermal function?
Pin 2 is explicitly designated "not connected" (n.c.) in Nexperia's official pinning diagram and internal construction. It has no electrical or thermal connection to the die. PCB layout must leave it unconnected - no trace, solder mask opening, or thermal relief - to avoid unintended parasitic coupling or mechanical stress.
How does the +15.4 mV/K temperature coefficient affect long-term calibration stability?
A +15.4 mV/K coefficient means the Zener voltage increases by ~15.4 mV per °C rise in junction temperature. Over a 100 °C range (−25 °C to +75 °C ambient), this produces ~1.54 V drift - requiring either active temperature compensation or system-level calibration if sub-1 % voltage accuracy is required across temperature.
BZX84-B22,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 22 V
- Tolerance:
- ±2%
- Power - Max:
- 250 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B22,215 FAQ
1.How can I place an order for BZX84-B22,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B22,215 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-B22,215 reliable?
The price and inventory of BZX84-B22,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B22,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B22,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B22,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B22,215?
BZX84-B22,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B22,215 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-B22,215?
For technical support, including BZX84-B22,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B22,215 requirements.
6.How does Aetrix verify that BZX84-B22,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B22,215 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-B22,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B22,215?
All BZX84-B22,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B22,215, 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-B22,215 part is unused and in its original packaging.
Return procedure for BZX84-B22,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84-B22,215 Tags
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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
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MMSZ5245BS-7-F
Diodes Incorporated
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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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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