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Nexperia USA Inc. BZX8450-C27VL
- Part No.:
- BZX8450-C27VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C27VL.pdf
- Description:
- DIODE ZENER 27V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
BZX8450-C27VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in portable electronics. It delivers a nominal 27 V regulation at 50 µA test current, with ±5 % tolerance, 300 Ω differential resistance at 5 mA, and 250 mW total power dissipation. Used in battery-powered sensor nodes and low-power microcontroller reset circuits.
For engineers reviewing the BZX8450-C27VL datasheet, BZX8450-C27VL pinout, BZX8450-C27VL application, or BZX8450-C27VL equivalent, key selection criteria include its low-test-current specification (50 µA), intentional leakage optimization for noise reduction per AN90031, SOT23 footprint compatibility, and 25.65 V to 28.35 V guaranteed Zener voltage range at 25 °C.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across a wide reverse-bias current range (50 µA to 5 mA). Its Zener breakdown mechanism provides predictable voltage reference behavior with a temperature coefficient of +21.4 mV/K and diode capacitance of 50 pF at 0 V.
The BZX8450-C27VL belongs to the "C" tolerance series (±5 %), features an intentionally elevated leakage current versus "B" series parts to improve switching speed and reduce noise-confirmed in application note AN90031-and is rated for ambient temperatures from −55 °C to +150 °C with 150 °C maximum junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 25.65 V to 28.35 V at IZ = 50 µA - guarantees regulation window under ultra-low bias conditions |
| Differential Resistance (rdiff) | 300 Ω max at IZ = 5 mA - defines voltage stability against load current variation |
| Forward Voltage (VF) | ≤ 0.9 V at IF = 10 mA - ensures minimal conduction loss when forward-biased |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets thermal derating boundary for board-level design |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 20.4 V - specifies leakage below regulation threshold |
| Temperature Coefficient (SZ) | +21.4 mV/K - quantifies voltage drift per degree Celsius rise in junction temperature |
| Diode Capacitance (Cd) | 50 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise coupling and filtering response |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; must be held at or below cathode potential for Zener operation |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - no electrical function; must remain floating or grounded per layout best practice |
| 3 | Cathode (K) | Connected to higher-potential node; defines reference output point and carries full Zener current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in micropower systems where quiescent current budget is sub-100 µA |
| Optimized leakage profile | Intentional minor rise in IR per AN90031 - reduces switching transients and improves noise immunity in signal conditioning paths |
| ±5 % voltage tolerance | Guaranteed 25.65 V–28.35 V range - balances cost and precision for non-critical reference applications |
| Thermal robustness | 150 °C max junction temperature - supports operation in industrial ambient environments without forced cooling |
| SOT23 standard footprint | Compatible with IPC-7351B SOT23-3 land pattern - ensures drop-in placement on existing production lines |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 27 V bias to analog front-end op-amps in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed operating point for signal chain amplification. Use Value: Enables accurate 16-bit ADC readings by minimizing supply-induced offset drift under varying battery discharge curves. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers in IoT edge nodes. IC Role / Device Role / Timing Role: Zener-based voltage divider input to supervisor IC's sense pin. Use Value: Delivers repeatable 2.7 V reset trigger (via resistor divider) with <1 % hysteresis error over −40 °C to +85 °C. |
| Low-Power RF Front-End Bias | Industrial Signal Conditioning |
|
Use Scenario: Supplying regulated gate voltage to discrete GaAs FETs in sub-GHz receiver LNAs. IC Role / Device Role / Timing Role: Low-noise DC bias source replacing active regulators to avoid switching artifacts. Use Value: Reduces phase noise floor by 4 dB compared to LDO-based bias due to suppressed broadband ripple and optimized leakage. |
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Precision shunt reference in two-wire transmitter current source feedback path. Use Value: Maintains ±0.1 % full-scale accuracy over 10-year field life by limiting Zener voltage drift to <0.005 %/°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27 | Same 27 V nominal, ±5 % tolerance, but rated for 350 mW Ptot and lacks AN90031 leakage optimization | Higher power handling suits higher-current references; less suitable for ultra-low-noise or micropower designs | Select when >250 mW dissipation margin is required and noise performance is secondary |
| MMSZ5254BT1G | 27 V nominal, ±5 %, 500 mW rating, but uses SOD-123 package and exhibits 10× higher typical leakage at 20 V | Requires larger PCB area; higher IR degrades accuracy in high-impedance bias networks | Choose only if legacy SOD-123 footprint compatibility is mandatory and thermal headroom exceeds 250 mW |
Compared with BZX84-C27 and MMSZ5254BT1G, the BZX8450-C27VL uniquely combines SOT23 miniaturization, 50 µA test current specification, and AN90031-optimized leakage-making it the sole choice for noise-sensitive, space-constrained, and battery-limited Zener reference implementations.
Availability
BZX8450-C27VL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power RF front-end bias requiring stable component supply with consistent parametric performance across production lots.
Supply support for BZX8450-C27VL 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.
The BZX8450 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and noise-critical applications where traditional regulators consume excessive quiescent current or introduce switching artifacts.
FAQ
What is the guaranteed Zener voltage range for BZX8450-C27VL at 25 °C?
The guaranteed Zener voltage range is 25.65 V to 28.35 V when measured at IZ = 50 µA and Tj = 25 °C. This ±5 % tolerance band is verified per production test limits in the official Nexperia datasheet Rev. 3 (July 2024), and applies exclusively under the stated test condition-not at higher currents or temperatures.
Can BZX8450-C27VL be used in forward conduction mode?
Yes-it exhibits ≤ 0.9 V forward voltage at 10 mA, making it usable as a low-drop silicon diode in clamping or protection roles. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward characteristics are secondary and not guaranteed beyond the stated max VF value.
Why does BZX8450-C27VL have a "not connected" pin?
Pin 2 is internally unconnected and serves only mechanical support and thermal conduction in the SOT23 package. It must remain electrically floating or tied to ground per layout guidelines to avoid parasitic coupling; connecting it to a signal net may induce noise or alter thermal resistance from junction to solder point (Rth(j-sp) = 330 K/W).
How does the AN90031 leakage optimization affect circuit performance?
Per Application Note AN90031, the intentional minor rise in leakage current reduces switching transients and suppresses broadband noise in high-impedance bias networks. In practice, this yields up to 4 dB lower phase noise in RF bias applications and eliminates audible "tick" artifacts in audio signal chains-without compromising Zener voltage accuracy or temperature stability.
BZX8450-C27VL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 20.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C27VL FAQ
1.How can I place an order for BZX8450-C27VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C27VL 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 BZX8450-C27VL reliable?
The price and inventory of BZX8450-C27VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C27VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C27VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C27VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C27VL?
BZX8450-C27VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C27VL 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 BZX8450-C27VL?
For technical support, including BZX8450-C27VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C27VL requirements.
6.How does Aetrix verify that BZX8450-C27VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C27VL 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 BZX8450-C27VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C27VL?
All BZX8450-C27VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C27VL, 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 BZX8450-C27VL part is unused and in its original packaging.
Return procedure for BZX8450-C27VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C27VL 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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MMSZ4682T1G
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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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