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Nexperia USA Inc. BZX8450-C4V7-QVL
- Part No.:
- BZX8450-C4V7-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C4V7-QVL.pdf
- Description:
- DIODE ZENER 4.7V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:30,000
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Product details
Overview
BZX8450-C4V7-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers 4.7 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW power dissipation, and 140 pF junction capacitance at 0 V - enabling stable operation in low-power sensor interfaces and microcontroller reset circuits.
For engineers reviewing the BZX8450-C4V7-QVL datasheet, BZX8450-C4V7-QVL pinout, BZX8450-C4V7-QVL application, or BZX8450-C4V7-QVL equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 500 K/W), and validated automotive-grade replacement options - all critical for battery-powered ECU subsystems and space-constrained PCB designs.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.47 V to 4.94 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance ≤80 Ω at IZ = 5 mA. Its low leakage current (<3.0 µA at VR = 3.0 V) supports ultra-low quiescent current designs.
Qualified per AEC-Q101, it sustains junction temperatures up to 150 °C and ambient ranges from −55 °C to +150 °C. The SOT23 package features a 1.9 mm pin pitch and FR4-PCB optimized thermal performance (Rth(j-sp) = 330 K/W to cathode solder point).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V (min 4.47 V, max 4.94 V at IZ = 50 µA) - defines precise reference level for 3.3 V/5 V rail monitoring |
| Tolerance | ±5 % - enables cost-effective selection for non-critical voltage clamping without tight binning |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - supports continuous operation in unheated automotive cabin modules |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures minimal drop during polarity protection or LED biasing configurations |
| Junction Capacitance | 140 pF at VR = 0 V, f = 1 MHz - limits high-frequency noise coupling in ADC reference paths |
| Thermal Resistance | 500 K/W (junction-to-ambient, free air) - informs derating curves for PCB layout in sealed enclosures |
| Reverse Leakage | ≤3.0 µA at VR = 3.0 V - preserves battery life in always-on wake-up circuits |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, tin-plated terminations compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node; reverse-biased during regulation - requires current-limiting resistor in series |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Connects to higher-potential node; carries full Zener current - routed to ground plane for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and infotainment applications per stress-test requirements |
| Low test current operation | Specified at 50 µA - enables use with high-impedance voltage dividers in battery-backed RTC circuits |
| Optimized leakage profile | Intentional minor IR rise (vs. B-series) improves switching speed and reduces broadband noise in signal conditioning |
| Two tolerance grades | ±2 % (B-series) and ±5 % (C-series) - allows cost/performance trade-off without redesigning bias networks |
| FR4-PCB thermal design support | Rth(j-sp) = 330 K/W to cathode tab - guides copper pour sizing for thermal management in compact layouts |
Applications
| Automotive Cabin Sensor Interface | Portable Medical Device Reference |
|---|---|
Use Scenario: Voltage reference for analog front-end of cabin temperature/humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Zener regulator providing stable 4.7 V reference to ADC driver op-amp and microcontroller VREF pin. Use Value: ±5 % tolerance and −2.7 mV/K TC ensure <±10 mV drift over −40 °C to +85 °C, meeting ASIL-B signal integrity targets. |
Use Scenario: Bias voltage source for low-power pulse oximeter LED drivers and photodiode transimpedance amplifiers. IC Role / Device Role / Timing Role: Low-current Zener supplying regulated 4.7 V to analog signal chain from coin-cell battery. Use Value: 3.0 µA max leakage at 3.0 V extends CR2032 battery life beyond 2 years in standby mode. |
| Industrial PLC Input Protection | Smart Meter Power Supply Monitoring |
Use Scenario: Overvoltage clamp on 24 V DC digital input channels subjected to inductive load transients. IC Role / Device Role / Timing Role: Fast-response Zener shunting surge energy into current-limiting resistor before downstream optocoupler. Use Value: 40 W non-repetitive peak power rating (tp = 100 µs) absorbs EN 61000-4-4 Level 3 surges without degradation. |
Use Scenario: Undervoltage detection circuit monitoring 5 V SMPS output in electricity meter mainboard. IC Role / Device Role / Timing Role: Zener-based comparator reference feeding into microcontroller's internal analog watchdog. Use Value: 140 pF capacitance avoids phase shift in 10 kHz monitoring loop, ensuring accurate brown-out response timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V7,115 | Same SOT23 package, ±5 % tolerance, but not AEC-Q101 qualified; Rth(j-a) = 530 K/W | Limited to industrial/commercial grade; unsuitable for automotive ECU or ADAS modules | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs thermal margin |
| MMSZ4704T1G | ±5 % tolerance, 500 mW Ptot, but 200 mA IF max vs. 200 mA absolute max - higher power handling, larger SOD-123 footprint | Requires PCB area increase; better suited for 12 V rail clamping than 4.7 V low-current references | Choose for higher surge immunity where board space permits and thermal budget allows 500 mW operation |
Compared with BZX8450-C4V7-QVL, the BZX84-C4V7,115 lacks automotive qualification and has higher thermal resistance, while MMSZ4704T1G trades compactness for robustness - making the QVL variant optimal for AEC-Q101-compliant, space-constrained 4.7 V reference designs.
Availability
BZX8450-C4V7-QVL is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable medical devices, industrial PLC inputs, and smart meter power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C4V7-QVL 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 components and advanced packaging.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-certified Zener diode portfolio, engineered specifically for low-current voltage reference and overvoltage protection in harsh-environment automotive and industrial electronics.
FAQ
What is the maximum reverse current at 3.0 V for BZX8450-C4V7-QVL?
The maximum reverse current is 3.0 µA at VR = 3.0 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This low leakage supports multi-year battery operation in always-on monitoring circuits and ensures minimal loading on high-impedance bias networks.
Is pin 2 electrically connected internally?
No, pin 2 is explicitly designated "not connected" (n.c.) in the pinning table and simplified outline. It is an isolated terminal with no internal bond wire or die connection - PCB traces must avoid routing or soldering to this pad to prevent mechanical stress or unintended coupling.
How does the C-series differ from the B-series in the BZX8450-Q family?
The C-series (e.g., BZX8450-C4V7-QVL) offers ±5 % tolerance and an intentional minor rise in leakage current to optimize fast switching and reduce broadband noise, whereas the B-series provides tighter ±2 % tolerance and lower leakage - both share identical SOT23 packaging and AEC-Q101 qualification.
Can BZX8450-C4V7-QVL be used in place of a 5.1 V Zener?
No - its nominal Zener voltage is 4.7 V (range 4.47 V to 4.94 V), which falls outside the 5.1 V specification (typically 4.85 V to 5.36 V for ±5 %). Substituting would cause undervoltage errors in reference-dependent circuits; use BZX8450-C5V1-QVL for 5.1 V applications.
BZX8450-C4V7-QVL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX8450-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C4V7-QVL FAQ
1.How can I place an order for BZX8450-C4V7-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C4V7-QVL 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-C4V7-QVL reliable?
The price and inventory of BZX8450-C4V7-QVL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C4V7-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C4V7-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C4V7-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C4V7-QVL?
BZX8450-C4V7-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C4V7-QVL 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-C4V7-QVL?
For technical support, including BZX8450-C4V7-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C4V7-QVL requirements.
6.How does Aetrix verify that BZX8450-C4V7-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C4V7-QVL 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-C4V7-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C4V7-QVL?
All BZX8450-C4V7-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C4V7-QVL, 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-C4V7-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C4V7-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C4V7-QVL 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
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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