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Nexperia USA Inc. BZX84-A27,215
- Part No.:
- BZX84-A27,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-A27,215.pdf
- Description:
- DIODE ZENER 27V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:12,203
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Product details
Overview
BZX84-A27,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in space-constrained PCBs. It delivers a nominal 27 V breakdown voltage at 2 mA test current, with 300 Ω maximum differential resistance and ≤1.0 µA reverse leakage at 21.6 V, commonly used in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the BZX84-A27,215 datasheet, BZX84-A27,215 pinout, BZX84-A27,215 application, or BZX84-A27,215 equivalent, this page provides verified electrical parameters, thermal behavior, real-world use cases, and validated alternative parts for design-in decisions under tight voltage tolerance and SMT footprint constraints.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage by conducting reverse current above its specified Zener voltage (26.73 V to 27.27 V at IZ = 2 mA). Its temperature coefficient of +18.9 mV/K ensures predictable drift across industrial temperature ranges.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it supports pulsed reverse power dissipation up to 40 W (100 µs, Tj = 25 °C), while continuous operation is limited to 250 mW at Tamb ≤ 25 °C due to junction-to-ambient thermal resistance of 500 K/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 26.73 V to 27.27 V at IZ = 2 mA - defines precise regulation point for feedback or clamping |
| Tolerance | ±1 % - enables high-accuracy voltage references without external trimming |
| Differential Resistance (rdif) | ≤300 Ω - limits output impedance variation under load changes |
| Reverse Current (IR) | ≤0.05 µA at VR = 21.6 V - ensures minimal standby power loss in sensing circuits |
| Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard PCB |
| Junction Temperature (Tj) | −55 °C to +150 °C - supports operation in extended industrial environments |
| Package | SOT23 (TO-236AB) - 3-pin surface-mount footprint compatible with automated reflow assembly |
Pinout & Package
SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; compact 2.9 mm × 1.3 mm footprint and 1.1 mm height optimized for high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener configuration |
| 2 | Not Connected (n.c.) | Internal die bond wire stub; electrically isolated and must remain unconnected |
| 3 | Cathode (K) | Zener breakdown terminal; connects to regulated output or voltage reference node |
Key Features
| Feature | Design Value |
|---|---|
| ±1 % voltage tolerance | Enables direct replacement of higher-cost precision references in non-critical feedback paths |
| 250 mW total power dissipation | Supports stable regulation in low-current (<10 mA) applications without heatsinking |
| Non-repetitive peak reverse power: 40 W | Provides transient overvoltage suppression capability during ESD or surge events |
| Thermal resistance (junction-to-ambient): 500 K/W | Defines derating curve: power must be reduced by 1.0 mW/°C above 25 °C ambient |
| Marking code: %75 | Enables visual identification on assembled PCBs per JEDEC-compliant SOT23 top-side marking |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-boost converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing error signal to TL431 or controller IC. Use Value: ±1 % tolerance ensures <±0.3 V output deviation at 27 V setpoint, reducing need for post-production calibration. |
Use Scenario: Protecting microcontroller GPIO pins or ADC inputs from accidental 30 V transients. IC Role / Device Role / Timing Role: Passive clamping element diverting excess energy to ground when input exceeds 27 V. Use Value: 40 W non-repetitive surge rating absorbs 100 µs spikes without degradation, extending system reliability. |
| Low-Power Sensor Biasing | Reference Voltage Generator |
|
Use Scenario: Providing stable bias voltage to analog sensor bridges or op-amp input stages in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source replacing active regulators where 27 V is required. Use Value: ≤0.05 µA reverse leakage at 21.6 V minimizes battery drain in always-on monitoring circuits. |
Use Scenario: Generating fixed 27 V reference for comparator thresholds or DAC reference inputs in industrial control modules. IC Role / Device Role / Timing Role: Precision shunt reference establishing known voltage level independent of supply rail fluctuations. Use Value: +18.9 mV/K temperature coefficient allows predictable drift compensation in firmware or hardware design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5256BS-7-F | 27 V ±5 %, 350 mW Ptot, SOT23 package, 500 Ω rdif | Looser tolerance increases output variation; higher power rating allows greater surge margin | Select when cost sensitivity outweighs voltage accuracy requirements and board layout permits same footprint |
| Vishay BZX84-C27-TP | 27 V ±5 %, 250 mW Ptot, SOT23 package, 300 Ω rdif, 10 µA IR at VR = 21.6 V | Higher leakage reduces suitability for ultra-low-power sensor biasing | Choose for legacy designs already qualified with ±5 % tolerance and where leakage is not critical |
Compared with BZX84-A27,215, the MMBZ5256BS-7-F trades voltage precision for higher surge resilience, while the BZX84-C27-TP sacrifices leakage performance for broader availability and lower unit cost-making the A27 variant optimal where ±1 % stability and sub-µA leakage are mandatory.
Availability
BZX84-A27,215 is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power sensor biasing requiring stable component supply and consistent ±1 % voltage tolerance across production batches.
Supply support for BZX84-A27,215 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 leading semiconductor manufacturer specializing in high-volume logic, discrete, and MOSFET devices, with global manufacturing and R&D centers focused on automotive, industrial, and consumer applications.
The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for space-efficient, low-power voltage regulation and clamping in high-reliability commercial and industrial systems.
FAQ
What is the maximum continuous reverse current the BZX84-A27,215 can sustain at 25 °C ambient?
The device sustains up to 9.26 mA continuous reverse current at 27 V (calculated from Ptot = 250 mW ÷ VZ ≈ 9.26 mA), assuming no additional thermal resistance beyond the specified 500 K/W junction-to-ambient value on a standard FR4 PCB.
Can BZX84-A27,215 replace a 24 V Zener diode in an existing circuit?
No-it is not a drop-in replacement for 24 V Zeners due to its 27 V nominal breakdown voltage; substituting it would raise the regulation or clamp threshold by 3 V, potentially causing overvoltage stress on downstream components unless circuit gain or feedback ratio is adjusted.
Is the n.c. pin (pin 2) safe to connect to ground or leave floating on the PCB?
Pin 2 is internally unconnected and must remain unconnected on the PCB; grounding or routing it may cause unintended parasitic coupling or solder bridging risks, and violates the manufacturer's mounting instructions defined in the SOT23 footprint specification.
How does temperature affect the Zener voltage of BZX84-A27,215 in operation?
Its temperature coefficient is +18.9 mV/K, meaning the breakdown voltage increases by approximately 18.9 mV per degree Celsius rise in junction temperature; at 100 °C junction temperature (75 °C above 25 °C), VZ rises by ~1.41 V, shifting the nominal 27 V rating to ~28.41 V.
BZX84-A27,215 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):
- 27 V
- Tolerance:
- ±1%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 18.9 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-A27,215 FAQ
1.How can I place an order for BZX84-A27,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-A27,215 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-A27,215 reliable?
The price and inventory of BZX84-A27,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-A27,215 is usually 5 days.
3.What payment methods are accepted for BZX84-A27,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-A27,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-A27,215?
BZX84-A27,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-A27,215 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-A27,215?
For technical support, including BZX84-A27,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-A27,215 requirements.
6.How does Aetrix verify that BZX84-A27,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-A27,215 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-A27,215 meets industry standards.
7.What is the process for return or replacement of BZX84-A27,215?
All BZX84-A27,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-A27,215, 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-A27,215 part is unused and in its original packaging.
Return procedure for BZX84-A27,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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