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Nexperia USA Inc. BZX8450-C2V4-QR
- Part No.:
- BZX8450-C2V4-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C2V4-QR.pdf
- Description:
- DIODE ZENER 2.4V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
BZX8450-C2V4-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in space-constrained, battery-powered systems. It delivers a nominal 2.4 V regulation at 50 µA test current, with ±5 % tolerance, 200 mA peak forward current, and 250 mW total power dissipation - optimized for automotive sensor interfaces and portable MCU supply rails.
For engineers reviewing the BZX8450-C2V4-QR datasheet, BZX8450-C2V4-QR pinout, BZX8450-C2V4-QR application, or BZX8450-C2V4-QR equivalent, this page provides verified electrical characteristics, AEC-Q101 qualification status, thermal resistance data (Rth(j-a) = 500 K/W), and real-world use context for low-power voltage stabilization in harsh-environment electronics.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable reverse-bias voltage across its cathode-anode terminals under varying load conditions. Its specified regulation voltage of 2.4 V is guaranteed at IZ = 50 µA, with differential resistance ≤600 Ω at IZ = 5 mA and temperature coefficient of −3.5 mV/K - enabling predictable drift compensation in temperature-sensitive analog circuits.
The SOT23-3 package features Pin 1 (anode), Pin 2 (not connected), and Pin 3 (cathode), supporting automated assembly and thermal management via solder-point conduction (Rth(j-sp) = 330 K/W). Its intentional minor leakage rise improves switching speed and reduces noise per AN90031, distinguishing it from standard B-series variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage (VZ) | 2.28 V to 2.52 V at IZ = 50 µA - ensures tight 2.4 V reference for low-bias analog front-ends |
| Tolerance | ±5 % - matches C-series grading for cost-sensitive automotive and industrial control applications |
| Differential Resistance | ≤600 Ω at IZ = 5 mA - limits output impedance impact on load regulation accuracy |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA - minimizes conduction loss when used in series bias configurations |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - defines maximum continuous DC power handling on standard FR4 PCB |
| Junction Temperature | −55 °C to +150 °C - supports operation in under-hood automotive environments |
| Reverse Current (IR) | ≤1.0 µA at VR = 1.0 V - enables ultra-low standby current in always-on monitoring circuits |
Pinout & Package
SOT23-3 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pitch); thermally enhanced for PCB-mounted operation with single-sided 70 μm copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal for forward conduction; connects to lower-potential node in shunt regulation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal bond wire - must remain unconnected in layout |
| 3 | Cathode (K) | Negative terminal for reverse-bias regulation; ties to system ground or reference rail |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Low test current operation | Specified at 50 µA - enables stable regulation in microamp-level battery backup circuits |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching transients and broadband noise |
| Thermal performance | Rth(j-sp) = 330 K/W - enables efficient heat transfer through cathode pad to PCB copper |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Shunt regulator providing stable 2.4 V bias to analog signal conditioning circuitry. Use Value: ±5 % tolerance and −3.5 mV/K TC ensure <±15 mV drift over −40 °C to +125 °C ambient range. | Use Scenario: Low-power voltage reference in wearable ECG front-end amplifiers. IC Role / Device Role / Timing Role: Precision Zener element establishing reference for ADC input scaling. Use Value: 1.0 µA max IR at 1.0 V reverse bias extends battery life in multi-week continuous monitoring. |
| Industrial PLC Input Modules | Smart Meter Power Management |
Use Scenario: Signal-level clamping and level-shifting for 24 V digital inputs interfacing with 3.3 V microcontrollers. IC Role / Device Role / Timing Role: Bidirectional protection and regulation element in optocoupler input stages. Use Value: 200 mA peak forward current rating allows transient surge absorption without latch-up. | Use Scenario: Bias supply for real-time clock (RTC) and backup SRAM in energy meter SoCs. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining RTC voltage during main supply brownouts. Use Value: 50 µA test current specification aligns with RTC's 0.5–2 µA operating current requirements. |
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-C2V4,115 | Same SOT23 package, ±5 % tolerance, but rated at 300 mW Ptot and specified at IZ = 5 mA | Higher power handling suits higher-current bias networks; less suitable for ultra-low-IQ designs | Select when >250 mW dissipation margin is required and 5 mA test current aligns with system bias point |
| MMSZ4676T1G | 2.4 V, ±5 %, SOD-123 package, 500 mW rating, VF = 0.9 V at 10 mA, but not AEC-Q101 qualified | Larger footprint and non-automotive qualification limit use in safety-critical vehicle subsystems | Choose for cost-sensitive industrial applications where AEC-Q101 compliance is not mandated |
Compared with BZX8450-C2V4-QR, BZX84-C2V4,115 offers higher power headroom but requires higher bias current, while MMSZ4676T1G trades automotive qualification for higher power and larger package - making the BZX8450-C2V4-QR optimal for AEC-Q101-compliant, low-IQ embedded regulation.
Availability
BZX8450-C2V4-QR is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, and industrial PLC input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C2V4-QR 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 specializing in high-performance, reliable discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current voltage reference and regulation in automotive and industrial systems demanding robustness and precision at minimal quiescent current.
FAQ
What is the maximum reverse voltage (VR) that BZX8450-C2V4-QR can withstand before breakdown?
The device is rated for a nominal Zener voltage of 2.4 V with a tolerance band of 2.28 V to 2.52 V at IZ = 50 µA. Its absolute maximum reverse voltage is not defined separately - instead, the limiting reverse condition is governed by the non-repetitive peak reverse power dissipation (PZSM = 40 W for tp = 100 µs), beyond which irreversible junction damage occurs.
Is Pin 2 internally connected, and what happens if it is accidentally soldered to ground?
No, Pin 2 is explicitly designated "not connected" (n.c.) in the official pinning diagram and has no internal bond wire. Accidentally connecting it to ground or any other net introduces no electrical function but risks mechanical stress or solder bridging - layout guidelines require leaving Pin 2 unconnected and avoiding copper pour beneath it.
How does the −3.5 mV/K temperature coefficient affect regulation stability over temperature?
At a nominal 2.4 V, the −3.5 mV/K coefficient means the Zener voltage decreases by approximately 0.84 mV per 1 °C rise in junction temperature. Over a −40 °C to +125 °C range (ΔT = 165 K), total drift is ~−578 mV - but actual variation is bounded by the 2.28 V to 2.52 V min/max spec at 25 °C and confirmed by characterization curves in Figure 7.
Can BZX8450-C2V4-QR be used in place of a standard 2.4 V Zener like 1N4730A?
No - the BZX8450-C2V4-QR is optimized for low-current operation (50 µA test point) and features intentional leakage behavior for noise reduction, whereas the 1N4730A is rated at 41 mA and exhibits different dynamic impedance and thermal response. Substitution requires full validation of bias current, power derating, and transient behavior in the target circuit.
BZX8450-C2V4-QR 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):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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-C2V4-QR FAQ
1.How can I place an order for BZX8450-C2V4-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C2V4-QR 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-C2V4-QR reliable?
The price and inventory of BZX8450-C2V4-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX8450-C2V4-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C2V4-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C2V4-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C2V4-QR?
BZX8450-C2V4-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C2V4-QR 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-C2V4-QR?
For technical support, including BZX8450-C2V4-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C2V4-QR requirements.
6.How does Aetrix verify that BZX8450-C2V4-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C2V4-QR 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-C2V4-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C2V4-QR?
All BZX8450-C2V4-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C2V4-QR, 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-C2V4-QR part is unused and in its original packaging.
Return procedure for BZX8450-C2V4-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C2V4-QR Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
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MM5Z5V1ST1G
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