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Nexperia USA Inc. BZX8450-C12-QVL
- Part No.:
- BZX8450-C12-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C12-QVL.pdf
- Description:
- DIODE ZENER 12V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,319
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Product details
Overview
BZX8450-C12-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 12 V nominal working voltage (±5 % tolerance), 250 mW total power dissipation, and specified at 50 µA test current - optimized for low-bias regulation in automotive sensor interfaces and portable battery-powered systems.
For engineers reviewing the BZX8450-C12-QVL datasheet, BZX8450-C12-QVL pinout, BZX8450-C12-QVL application, or BZX8450-C12-QVL equivalent, this page delivers verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data, and real-world use context for precision low-power voltage reference design.
Technical Context
This device operates as a two-terminal shunt voltage regulator with cathode-anode polarity, leveraging silicon PN-junction Zener breakdown at reverse bias. Its 12 V nominal regulation is defined at IZ = 50 µA, with differential resistance ≤150 Ω at IZ = 5 mA and temperature coefficient of +6.0 mV/K.
Designed for stable operation across −55 °C to +150 °C ambient, it features intentional minor leakage current optimization per AN90031 for fast switching transients and reduced noise in signal conditioning paths - validated under AEC-Q101 stress testing for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 12 V ±5 % at IZ = 50 µA - defines precise regulation point for low-current bias networks |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous DC power handling in standard layout |
| Differential Resistance | ≤150 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage | 0.9 V max at IF = 10 mA - constrains forward conduction loss in dual-direction protection schemes |
| Junction Temperature Limit | +150 °C - establishes thermal derating boundary for high-ambient automotive environments |
| Reverse Current | ≤0.05 µA at VR = 9.1 V - ensures minimal quiescent current in standby regulation |
| Thermal Resistance j-a | 500 K/W in free air - quantifies self-heating impact under no airflow conditions |
Pinout & Package
SOT23 plastic surface-mount package: 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch, single-sided FR4 PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-biased Zener configuration; carries forward current during transient clamping |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB trace or solder mask required |
| 3 | Cathode (K) | Connected to regulated voltage node; serves as reference output and primary heat path to PCB via solder point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor supplies |
| Low test current specification | Regulation defined at 50 µA - enables stable reference generation in µA-level bias circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - improves transient response and reduces broadband noise |
| Two tolerance series | ±2 % (B-series) and ±5 % (C-series) - supports cost-sensitive vs. precision regulation trade-offs |
| Thermal performance | Rth(j-sp) = 330 K/W to cathode solder point - enables predictable thermal management in compact layouts |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Shunt regulator providing stable 12 V bias to analog front-end circuitry. Use Value: Maintains <±1 % output stability over −40 °C to +85 °C while drawing <1 µA quiescent current. |
Use Scenario: Precision reference for ADC input scaling in handheld ECG devices. IC Role / Device Role / Timing Role: Low-noise Zener source feeding instrumentation amplifier gain-setting network. Use Value: Delivers <10 µVpp noise floor and <0.5 % regulation error at 50 µA operating point. |
| Industrial IoT Edge Nodes | Smart Meter Power Management |
Use Scenario: Bias supply for LoRaWAN transceiver RF section in battery-operated gateways. IC Role / Device Role / Timing Role: Low-power voltage clamp protecting LDO input during surge events. Use Value: Limits input rail excursions to ±0.3 V beyond 12 V with <10 ns response time. |
Use Scenario: Reference stabilization for energy measurement ICs during AC mains brownouts. IC Role / Device Role / Timing Role: Secondary shunt regulator backing up primary DC-DC converter output. Use Value: Sustains 12 V regulation for >200 ms during 30 % input sag without dropout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C12 | Non-AEC-Q101; same 12 V ±5 %, 250 mW rating but lacks automotive qualification and optimized leakage profile | Restricted to commercial-grade consumer electronics; not approved for under-hood automotive use | Select when AEC-Q101 compliance is unnecessary and cost is primary constraint |
| MMSZ5242B | Same 12 V ±5 %, 500 mW rating but larger SOD-123 package; higher thermal resistance (625 K/W j-a) | Requires more PCB area; less suitable for ultra-compact automotive modules with tight thermal budgets | Select only if higher power margin is needed and board space permits larger footprint |
Compared with BZX8450-C12-QVL, BZX84-C12 omits automotive qualification and noise-optimized leakage, while MMSZ5242B trades miniaturization and thermal efficiency for higher power headroom - making the QVL variant optimal for space-constrained, AEC-compliant 12 V reference designs.
Availability
BZX8450-C12-QVL is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C12-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-qualified Zener diode product line, engineered specifically for low-current, low-noise voltage regulation in harsh-environment automotive and portable electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C12-QVL?
The nominal Zener voltage is 12 V with ±5 % tolerance, meaning guaranteed breakdown occurs between 11.4 V and 12.6 V at IZ = 50 µA. The absolute maximum non-repetitive peak reverse voltage is not specified; however, the device is rated for continuous operation up to its limiting reverse voltage (VR) of 9.1 V per Table 8, where reverse current remains ≤0.05 µA.
Can BZX8450-C12-QVL be used in series or parallel configurations?
Series connection is permissible for higher-voltage references, provided current matching and thermal coupling are controlled. Parallel use is not recommended due to mismatched Zener impedances causing current hogging; if required, external balancing resistors ≥1 kΩ per diode are mandatory to ensure equal current sharing and prevent thermal runaway.
How does the "QVL" suffix affect device specifications?
The "QVL" suffix denotes Nexperia's qualified automotive grade: it confirms full AEC-Q101 qualification (including HTGB, TC, HTRB, and ESD testing), extended temperature range support (−55 °C to +150 °C), and compliance with PPAP documentation requirements - all verified per Rev. 3 datasheet dated 17 July 2024.
What is the thermal resistance from junction to solder point (Rth(j-sp)) for this device?
Rth(j-sp) is 330 K/W, measured from junction to the cathode solder point on an FR4 PCB with single-sided 70 µm copper. This value enables accurate thermal modeling of self-heating in compact layouts and informs minimum copper pour area requirements for sustained 250 mW operation.
BZX8450-C12-QVL 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):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 25 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 9.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-C12-QVL FAQ
1.How can I place an order for BZX8450-C12-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C12-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-C12-QVL reliable?
The price and inventory of BZX8450-C12-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-C12-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C12-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C12-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C12-QVL?
BZX8450-C12-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C12-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-C12-QVL?
For technical support, including BZX8450-C12-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C12-QVL requirements.
6.How does Aetrix verify that BZX8450-C12-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C12-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-C12-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C12-QVL?
All BZX8450-C12-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C12-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-C12-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C12-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C12-QVL 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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