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Nexperia USA Inc. BZX8450-C30-QVL
- Part No.:
- BZX8450-C30-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C30-QVL.pdf
- Description:
- DIODE ZENER 30V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,844
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Product details
Overview
BZX8450-C30-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision voltage reference and regulation at 30 V nominal Zener voltage with ±5 % tolerance, 300 Ω differential resistance at IZ = 5 mA, and specified test current of 50 μA - ideal for battery-powered sensor interfaces and automotive microcontroller supply rail clamping.
For engineers reviewing the BZX8450-C30-QVL datasheet, BZX8450-C30-QVL pinout, BZX8450-C30-QVL application, or BZX8450-C30-QVL equivalent, key selection criteria include Zener voltage accuracy at low bias current, thermal resistance (Rth(j-a) = 500 K/W), AEC-Q101 qualification, and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable reverse-biased breakdown at 30 V (C-series, min 28.5 V / max 31.5 V) under IZ = 50 μA to 5 mA conditions. Its intentional leakage current optimization supports fast transient response and reduced noise in feedback paths.
Thermal design relies on junction-to-ambient resistance of 500 K/W (FR4, single-sided copper), with maximum junction temperature rated at 150 °C and total power dissipation limited to 250 mW at Tamb ≤ 25 °C. It is qualified per AEC-Q101 for automotive underhood and infotainment subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 28.5 V to 31.5 V at IZ = 50 μA - defines tight regulation window for 30 V nominal rail protection |
| Differential Resistance rdiff | 300 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Forward Voltage VF | 0.9 V max at IF = 10 mA - ensures low conduction loss during forward-bias fault conditions |
| Power Dissipation Ptot | 250 mW max at Tamb ≤ 25 °C - sets thermal derating boundary for PCB layout and ambient margin |
| Reverse Current IR | 0.05 μA max at VR = 22.8 V - guarantees minimal standby leakage in battery-critical circuits |
| Temperature Coefficient SZ | +0.05 mV/K typical - enables predictable drift compensation in wide-temperature automotive environments |
| Junction Temperature Tj | −55 °C to +150 °C operating range - supports under-hood deployment without external heatsinking |
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 reflow assembly and high-density routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node; reverse-biased operation requires this terminal grounded or tied to reference potential |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder mask required |
| 3 | Cathode (K) | Connects to regulated voltage node; carries full Zener current during regulation and defines breakdown polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power management |
| Low test current (50 μA) | Enables stable regulation in ultra-low-power sensor nodes and wake-up circuitry |
| Optimized leakage profile | Intentional minor rise improves switching speed and reduces broadband noise in feedback loops |
| ±5 % VZ tolerance (C-series) | Provides cost-effective precision for non-critical regulation where tighter tolerance is unnecessary |
| SOT23 footprint compatibility | Supports drop-in replacement with industry-standard 3-pin discrete regulator footprints |
Applications
| Automotive Microcontroller Reset Circuit | Portable Gas Sensor Reference |
|---|---|
Use Scenario: Provides stable 30 V reference for reset supervisor ICs monitoring 24 V vehicle battery rails during cold-crank transients. IC Role / Device Role / Timing Role: Shunt regulator establishing precise threshold voltage for reset assertion logic. Use Value: AEC-Q101 qualification ensures reliability across −40 °C to +125 °C ambient, while 300 Ω rdiff maintains <1 % voltage deviation under 100 μA load variation. |
Use Scenario: Supplies calibrated bias voltage to electrochemical gas sensing elements in handheld CO detectors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current Zener reference enabling consistent sensor excitation independent of battery discharge curve. Use Value: 50 μA test current specification allows regulation down to 2.8 V battery voltage, extending usable life by >30 % versus standard 5 mA Zeners. |
| Industrial PLC Analog Input Protection | USB-C Power Delivery Feedback Clamp |
Use Scenario: Clamps overvoltage transients on 4–20 mA current loop receiver inputs exposed to ESD and inductive kickback in factory automation. IC Role / Device Role / Timing Role: Transient voltage suppressor placed in parallel with input op-amp stage. Use Value: 250 mW Ptot rating and 500 K/W Rth(j-a) allow sustained 30 V clamping without thermal runaway on FR4 PCBs. |
Use Scenario: Stabilizes feedback voltage divider in USB-C PD sink controllers regulating 9–20 V programmable power supply outputs. IC Role / Device Role / Timing Role: Precision Zener reference setting upper bound of optocoupler feedback signal. Use Value: ±5 % VZ tolerance and +0.05 mV/K temperature coefficient ensure <±2 % output voltage drift over 0–70 °C operating range. |
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-C30 | Non-AEC-Q101, same VZ range and SOT23 package but lacks automotive qualification and optimized leakage profile | Restricted to commercial-grade consumer electronics; not suitable for automotive or industrial harsh-environment use | Select when cost is primary constraint and AEC-Q101 compliance is unnecessary |
| MMSZ5256ET1G | 30 V nominal, ±5 %, 500 mW Ptot, higher rdiff (700 Ω), no AEC-Q101 qualification | Higher power handling but poorer regulation stability at low currents; unsuitable for battery-sensitive designs | Choose only if board-level thermal management supports higher dissipation and leakage performance is secondary |
Compared with BZX84-C30 and MMSZ5256ET1G, BZX8450-C30-QVL uniquely combines AEC-Q101 qualification, 50 μA test current specification, and intentional leakage tuning - making it the sole option for automotive-grade, low-bias, low-noise Zener regulation in space-constrained SOT23 layouts.
Availability
BZX8450-C30-QVL is available at Aetrix Electronics and suitable for automotive ECU power supervision, portable sensor reference, and industrial analog input protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C30-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 technologies.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, low-noise voltage reference and regulation in automotive and portable electronics where precision at microampere bias levels is critical.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C30-QVL?
The BZX8450-C30-QVL exhibits sharp reverse breakdown between 28.5 V and 31.5 V at IZ = 50 μA, with no guaranteed regulation below 28.5 V. Its absolute maximum non-repetitive peak reverse voltage is defined by PZSM = 40 W for 100 µs pulses, not by DC rating - sustained operation must remain within the 30 V ±5 % working range.
Can BZX8450-C30-QVL replace standard 1N4749A Zeners in existing designs?
No direct replacement is assured: BZX8450-C30-QVL uses SOT23 (3-pin, pin 2 n.c.), whereas 1N4749A is DO-41 (axial lead). Electrical differences include lower test current (50 μA vs. 41 mA), tighter thermal resistance (500 K/W vs. ~300 K/W in TO-204AA), and AEC-Q101 qualification - redesign of PCB footprint and thermal validation is required.
How does the "intentional minor rise of leakage current" improve performance?
This controlled increase in reverse leakage (vs. legacy BZX8450-B variants) reduces minority-carrier lifetime in the depletion region, yielding faster turn-on/turn-off response during transient overvoltage events and lowering broadband noise generation - verified in application note AN90031 for noise-sensitive analog front-ends and fast-switching regulators.
Is pin 2 (n.c.) electrically isolated or internally bonded?
Pin 2 is fully unconnected - no internal bond wire, die attachment, or metallization links it to the silicon die. It is mechanically part of the leadframe but electrically and thermally isolated. PCB layout must leave this pad floating; no solder mask opening or trace connection is permitted or beneficial.
BZX8450-C30-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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 22.8 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-C30-QVL FAQ
1.How can I place an order for BZX8450-C30-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C30-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-C30-QVL reliable?
The price and inventory of BZX8450-C30-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-C30-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C30-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C30-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C30-QVL?
BZX8450-C30-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C30-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-C30-QVL?
For technical support, including BZX8450-C30-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C30-QVL requirements.
6.How does Aetrix verify that BZX8450-C30-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C30-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-C30-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C30-QVL?
All BZX8450-C30-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C30-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-C30-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C30-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C30-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
-
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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