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Nexperia USA Inc. BZX8450-C1V8-QVL
- Part No.:
- BZX8450-C1V8-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C1V8-QVL.pdf
- Description:
- DIODE ZENER 1.8V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:39,900
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Product details
Overview
BZX8450-C1V8-Q from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 1.8 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-C1V8-Q datasheet, BZX8450-C1V8-Q pinout, BZX8450-C1V8-Q application, or BZX8450-C1V8-Q equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor nodes, automotive body control modules, and portable instrumentation where leakage-sensitive regulation is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 1.71 V to 1.89 V at IZ = 50 µA, exhibiting a differential resistance ≤ 600 Ω at 5 mA and temperature coefficient of −3.5 mV/K. Its low test current enables stable regulation under micro-power conditions.
The device features intentional minor leakage current optimization per AN90031 for fast switching transients and noise reduction, and achieves thermal resistance of 330 K/W (junction-to-solder point) on FR4 PCB with standard footprint - critical for thermally constrained automotive PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 1.8 V (range 1.71 V to 1.89 V at IZ = 50 µA - defines low-voltage rail stabilization in 1.8 V logic domains) |
| Tolerance | ±5 % (C-series grade - suitable for non-critical biasing where tighter tolerance is not required) |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C (limits continuous regulation current to ~139 mA at 1.8 V, constraining use to low-current applications) |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA (ensures minimal forward conduction loss when used bidirectionally or in protection schemes) |
| Junction Temperature | −55 °C to +150 °C (enables operation in under-hood automotive environments without derating) |
| Leakage Optimization | Intentional minor rise per AN90031 (reduces switching noise in feedback paths of DC-DC converters and LDOs) |
| AEC-Q101 Qualified | Qualified for automotive discrete semiconductor stress testing (supports deployment in ASIL-B–compatible subsystems) |
Pinout & Package
Package: SOT23 plastic surface-mounted package; 3-terminal, 1.9 mm pitch, 2.9 mm × 1.3 mm × 1 mm body; FR4 PCB mountable with standard reflow footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node in reverse-biased Zener configuration; must be routed with low-inductance trace for transient suppression |
| 2 | Not Connected (n.c.) | Internally unconnected terminal - must remain floating; no PCB pad connection or routing required |
| 3 | Cathode (K) | Connected to regulated output node; solder point serves as primary thermal path (Rth(j-sp) = 330 K/W) |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables stable regulation in µA-level bias networks (e.g., CMOS input references, ultra-low-power MCU reset circuits) |
| Automotive qualification | AEC-Q101 qualified - eliminates need for additional qualification effort in automotive Tier-1 designs targeting ISO/TS 16949 compliance |
| Leakage-optimized variant | C-series devices feature intentional minor leakage rise (per AN90031) - improves transient response and reduces high-frequency noise in feedback loops |
| Thermal performance | Rth(j-sp) = 330 K/W - allows direct thermal coupling to copper pour via cathode pad, supporting sustained operation at 125 °C ambient |
| Small-footprint packaging | SOT23 footprint (2.9 mm × 1.3 mm) - saves board space in dense automotive ECUs and wearable sensors without sacrificing solder joint reliability |
Applications
| Automotive Body Control Module (BCM) | Portable Medical Sensor Node |
|---|---|
Use Scenario: Voltage reference for LIN bus transceiver biasing and microcontroller ADC reference in door module electronics. IC Role / Device Role / Timing Role: Zener regulator providing stable 1.8 V reference to analog front-end and CAN/LIN interface ICs. Use Value: Low 50 µA test current minimizes quiescent drain on vehicle battery during sleep mode; AEC-Q101 rating ensures 15-year field reliability. |
Use Scenario: Precision biasing of low-power op-amps and analog signal conditioning in wearable ECG patch. IC Role / Device Role / Timing Role: Low-leakage voltage reference stabilizing amplifier gain-setting network and ADC reference divider. Use Value: ±5 % tolerance and −3.5 mV/K tempco enable <1 % total error over 0–50 °C; SOT23 size fits sub-10 cm² PCB area budget. |
| Industrial IoT Edge Node | Smart Home Battery-Powered Hub |
Use Scenario: Regulation of 1.8 V supply for BLE SoC and environmental sensor interface in wireless gateway. IC Role / Device Role / Timing Role: Primary voltage clamp protecting downstream logic from Li-ion battery overvoltage during charging cycles. Use Value: 250 mW dissipation supports 139 mA max clamping current; optimized leakage reduces standby current by >0.5 µA vs. standard Zeners. |
Use Scenario: Reference generation for voltage monitoring circuit in AA-battery-powered smart thermostat. IC Role / Device Role / Timing Role: Stable 1.8 V reference for comparator-based battery level detection and low-battery warning logic. Use Value: 1.71–1.89 V range ensures reliable trip point across battery discharge curve (0.9–1.5 V/cell); n.c. pin simplifies layout routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C1V8 | Non-AEC-Q101, ±5 % tolerance, same 1.8 V nominal, but lacks intentional leakage optimization and automotive qualification | Restricted to commercial-grade consumer electronics; unsuitable for automotive or industrial deployments requiring stress qualification | Select only for cost-sensitive non-automotive prototypes where AEC-Q101 is not mandated |
| MMSZ4678T1G | 1.8 V Zener, ±5 %, 500 mW Ptot, SOD-123 package, higher power but larger footprint and no AEC-Q101 rating | Supports higher continuous current but occupies 2.7× more board area; thermal resistance ~400 K/W limits high-temp performance | Choose when >250 mW dissipation is needed and SOT23 size constraint is relaxed |
Compared with BZX8450-C1V8-Q, BZX84-C1V8 omits automotive qualification and leakage tuning, while MMSZ4678T1G trades compactness and qualification for higher power - making the BZX8450-C1V8-Q optimal for space-constrained, AEC-compliant 1.8 V reference designs.
Availability
BZX8450-C1V8-Q is available at Aetrix Electronics and suitable for automotive body control modules, portable medical sensors, industrial IoT edge nodes, and smart home battery-powered hubs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-C1V8-Q 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 essential semiconductors for automotive, industrial, and mobile markets.
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 automotive electronics and portable battery-powered systems.
FAQ
What is the maximum reverse current at 1.8 V regulation?
At nominal 1.8 V regulation (VZ = 1.71–1.89 V), the reverse current is specified at IZ = 50 µA for parameter definition. The device exhibits ≤1.0 µA reverse leakage at VR = 1.0 V and Tj = 25 °C, per Table 8. This low leakage supports µA-level standby current budgets in battery-critical applications.
Can BZX8450-C1V8-Q replace BZX84-C1V8 in an existing design?
Yes, electrically and physically - both share identical SOT23 pinout, 1.8 V nominal voltage, ±5 % tolerance, and 250 mW power rating. However, BZX8450-C1V8-Q adds AEC-Q101 qualification and intentional leakage optimization per AN90031, making it suitable for automotive upgrades without layout change.
What is the significance of the 'n.c.' pin in the SOT23 package?
Pin 2 is internally not connected and must remain unconnected on the PCB. It is not a thermal pad or auxiliary terminal - routing or soldering to this pin violates the device's thermal and electrical specifications and may compromise AEC-Q101 compliance verification.
How does the −3.5 mV/K temperature coefficient affect accuracy over temperature?
With a −3.5 mV/K coefficient, the Zener voltage drifts −0.63 mV/°C across a 180 °C junction range (−55 °C to +125 °C), resulting in ±113 mV total shift - approximately ±6.3 % of 1.8 V. This is acceptable for non-precision biasing but requires compensation in high-accuracy references.
BZX8450-C1V8-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):
- 1.8 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 1 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-C1V8-QVL FAQ
1.How can I place an order for BZX8450-C1V8-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C1V8-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-C1V8-QVL reliable?
The price and inventory of BZX8450-C1V8-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-C1V8-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C1V8-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C1V8-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C1V8-QVL?
BZX8450-C1V8-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C1V8-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-C1V8-QVL?
For technical support, including BZX8450-C1V8-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C1V8-QVL requirements.
6.How does Aetrix verify that BZX8450-C1V8-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C1V8-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-C1V8-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C1V8-QVL?
All BZX8450-C1V8-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C1V8-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-C1V8-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C1V8-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C1V8-QVL Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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