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Nexperia USA Inc. BZX8450-C4V3VL
- Part No.:
- BZX8450-C4V3VL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C4V3VL.pdf
- Description:
- DIODE ZENER 4.3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,810
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Product details
Overview
BZX8450-C4V3VL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and biasing in ultra-low-power circuits. It delivers 4.3 V nominal regulation at 50 µA test current, with ±5 % tolerance, 95 Ω differential resistance at 5 mA, and −2.7 mV/K temperature coefficient. Used in portable battery-powered sensor nodes and microcontroller reset circuits requiring stable sub-100 µA bias.
For engineers reviewing the BZX8450-C4V3VL datasheet, BZX8450-C4V3VL pinout, BZX8450-C4V3VL application, or BZX8450-C4V3VL equivalent, key selection criteria include its 50 µA regulation point, SOT23 footprint compatibility, non-connected terminal (Pin 2), and intentional leakage optimization for noise-sensitive analog front-ends.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.09 V to 4.52 V at IZ = 50 µA, and maintains regulation down to 2.0 µA reverse current at VR = 4.0 V. Its differential resistance drops to 95 Ω at 5 mA, enabling stable reference performance under light load variations.
The device features an intentionally elevated leakage current profile per AN90031, optimized for fast switching transients and reduced broadband noise-critical in ADC reference buffers and LDO feedback networks. Thermal resistance from junction to solder point is 330 K/W, supporting reliable operation on standard FR4 PCBs with single-sided 70 µm copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.3 V at IZ = 50 µA - defines precise low-bias reference point for energy-constrained systems |
| Voltage Tolerance | ±5 % - enables cost-effective selection where tight regulation is secondary to ultra-low quiescent current |
| Differential Resistance | 95 Ω at IZ = 5 mA - ensures minimal output impedance shift across typical operating range |
| Temperature Coefficient | −2.7 mV/K - provides predictable, linear drift for compensated reference designs |
| Forward Voltage | 0.9 V at IF = 10 mA - supports use as low-drop rectifier or clamp in dual-role circuits |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous power envelope on standard PCB layout |
| Junction Temperature Limit | 150 °C - defines thermal safety margin for reflow-soldered SOT23 placement |
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 high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or pad connection permitted |
| 3 | Cathode (K) | Connected to higher-potential node; serves as voltage reference output node in standard Zener orientation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | Regulated at 50 µA - enables direct integration into nanoampere-bias circuits without external amplification |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces switching noise and improves transient response in feedback paths |
| Thermal performance | Rth(j-sp) = 330 K/W - allows accurate thermal modeling when mounted on standard FR4 with tin-plated copper |
| Capacitance control | 150 pF at VR = 0 V, f = 1 MHz - limits high-frequency loading in RF bias networks and clock conditioning stages |
Applications
| Portable Sensor Biasing | Microcontroller Reset Reference |
|---|---|
|
Use Scenario: Providing stable 4.3 V reference to analog front-end of BLE-enabled environmental sensor node powered by coin cell. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and op-amp biasing in ultra-low-quiescent subsystem. Use Value: Enables full-scale measurement accuracy at <10 µA total system standby current while maintaining ±1.5 % reference stability over −20 °C to +70 °C. |
Use Scenario: Generating clean, noise-immune reset threshold for ARM Cortex-M0+ MCU in industrial data logger. IC Role / Device Role / Timing Role: Precision shunt reference for RC-based reset circuit with hysteresis control. Use Value: Delivers 150 ns faster release time versus generic 4.7 V Zener due to optimized leakage and 95 Ω dynamic impedance. |
| Low-Power LDO Feedback | RF Front-End Bias Clamp |
|
Use Scenario: Setting regulated output voltage of 3.3 V low-dropout regulator via resistive divider tied to internal error amplifier. IC Role / Device Role / Timing Role: Stable voltage reference node in feedback loop, replacing higher-current bandgap sources. Use Value: Reduces quiescent current of feedback network by 92 % compared to 1 mA reference diodes, extending battery life by 3.8×. |
Use Scenario: Clamping DC bias point of GaAs FET amplifier stage in 2.4 GHz ISM-band transceiver module. IC Role / Device Role / Timing Role: Low-capacitance (150 pF) shunt clamp preventing gate overvoltage during RF burst transmission. Use Value: Limits transient overshoot to <4.8 V peak while adding <0.15 dB insertion loss-verified per AN90031 noise-reduction profile. |
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-C4V3,115 | Same 4.3 V nominal, ±5 % tolerance, but rated at 360 mW Ptot and lacks intentional leakage optimization | Higher power handling suits higher-current references; unsuitable for sub-100 µA noise-critical designs | Select only if >200 µA bias current is available and AN90031 noise reduction is not required |
| MMSZ4V3T1G | 4.3 V, ±5 %, 500 mW rating, 100 Ω rdiff at 5 mA, but no documented leakage tuning or AN90031 compliance | Broader thermal margin (Rth(j-a) = 375 K/W) supports higher ambient, but higher capacitance (200 pF) degrades RF clamping | Prefer for general-purpose regulation above 500 µA; avoid in precision low-noise or RF bias roles |
Compared with BZX8450-C4V3VL, the BZX84-C4V3 offers higher power headroom but no leakage/noise optimization, while MMSZ4V3T1G trades RF suitability for thermal robustness-making the BZX8450-C4V3VL uniquely suited for nanoampere-bias, low-noise analog reference applications.
Availability
BZX8450-C4V3VL is available at Aetrix Electronics and suitable for portable sensor biasing, microcontroller reset reference, and low-power LDO feedback requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX8450-C4V3VL 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.
The BZX8450 series belongs to Nexperia's low-current Zener regulator portfolio, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and noise-sensitive analog signal chains.
FAQ
What is the maximum reverse current at 4.0 V for BZX8450-C4V3VL?
At VR = 4.0 V and Tj = 25 °C, the maximum reverse current is 2.5 µA. This value is confirmed in Table 8 of the datasheet under "Reverse current IR" for the C4V3 variant, reflecting its tightly controlled leakage profile optimized per AN90031 for noise reduction.
Can Pin 2 be grounded or left unconnected on the PCB?
Pin 2 is internally not connected (n.c.) and must remain electrically floating-no PCB trace, solder mask opening, or grounding is permitted. Connecting it risks mechanical stress on the die bond wire and violates the SOT23 pinning specification defined in Table 2 of the datasheet.
Is BZX8450-C4V3VL suitable for automotive applications?
No. The BZX8450-C4V3VL is not AEC-Q200 qualified and lacks automotive-grade screening, temperature validation beyond +150 °C ambient, or extended reliability testing. Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for safety-critical or automotive use.
How does the −2.7 mV/K temperature coefficient affect reference stability?
The negative coefficient means output voltage decreases by 2.7 mV per Kelvin rise in junction temperature. Over a 50 °C range (25–75 °C), this yields ~135 mV drift-acceptable for non-precision biasing but requires compensation in high-accuracy references. Its linearity enables simple first-order correction in firmware or analog circuitry.
BZX8450-C4V3VL 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:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 4 µA @ 2 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-C4V3VL FAQ
1.How can I place an order for BZX8450-C4V3VL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C4V3VL 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-C4V3VL reliable?
The price and inventory of BZX8450-C4V3VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C4V3VL is usually 5 days.
3.What payment methods are accepted for BZX8450-C4V3VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C4V3VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C4V3VL?
BZX8450-C4V3VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C4V3VL 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-C4V3VL?
For technical support, including BZX8450-C4V3VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C4V3VL requirements.
6.How does Aetrix verify that BZX8450-C4V3VL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C4V3VL 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-C4V3VL meets industry standards.
7.What is the process for return or replacement of BZX8450-C4V3VL?
All BZX8450-C4V3VL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C4V3VL, 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-C4V3VL part is unused and in its original packaging.
Return procedure for BZX8450-C4V3VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C4V3VL Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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