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Nexperia USA Inc. BZX8450-C9V1-QR
- Part No.:
- BZX8450-C9V1-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C9V1-QR.pdf
- Description:
- DIODE ZENER 9.1V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:32,731
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Product details
Overview
BZX8450-C9V1-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 9.1 V nominal regulation at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX8450-C9V1-QR datasheet, BZX8450-C9V1-QR pinout, BZX8450-C9V1-QR application, or BZX8450-C9V1-QR equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor interfaces, ECU voltage monitoring circuits, and automotive infotainment power rail clamping.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 8.65 V to 9.56 V at IZ = 50 µA, exhibiting a temperature coefficient of +3.8 mV/K and differential resistance of 100 Ω at IZ = 5 mA. Its low leakage current (≤0.1 µA at VR = 7.3 V) supports stable biasing in ultra-low-power systems.
Designed for surface-mount assembly on FR4 PCBs with single-sided copper, it features thermal resistance Rth(j-a) = 500 K/W and Rth(j-sp) = 330 K/W, enabling reliable operation up to 150 °C junction temperature under defined board conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 9.1 V at IZ = 50 µA - defines precise regulation point for low-current reference applications |
| Voltage Tolerance | ±5 % - ensures predictable clamping across production lots without tight binning |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance | 100 Ω at IZ = 5 mA - determines output impedance and regulation stability under load variation |
| Reverse Leakage Current | ≤ 0.1 µA at VR = 7.3 V - enables minimal quiescent current draw in always-on circuits |
| Forward Voltage | 0.9 V at IF = 10 mA - defines conduction threshold and power loss during forward bias |
| Junction Temperature | 150 °C maximum - specifies absolute thermal limit for safe long-term operation |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), qualified per AEC-Q101 for automotive reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in Zener regulation configuration |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder joint required |
| 3 | Cathode (K) | Reverse-biased terminal; connects to higher-potential node and provides regulated output reference |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables accurate voltage setting in microamp-level bias networks |
| Optimized leakage profile | Intentional minor rise in leakage - improves switching speed and reduces noise in dynamic clamping |
| AEC-Q101 qualification | Qualified for automotive use - guarantees reliability under temperature cycling, humidity, and mechanical stress |
| Small-footprint SOT23 | 2.9 mm × 1.3 mm footprint - supports high-density PCB layouts in space-constrained modules |
Applications
| Automotive ECU Power Monitoring | Portable Sensor Bias Reference |
|---|---|
Use Scenario: Monitoring 12 V battery rail in engine control units to detect undervoltage/overvoltage faults. IC Role / Device Role / Timing Role: Zener clamp providing stable 9.1 V reference for comparator input against varying supply. Use Value: Enables fault detection within ±5 % accuracy while drawing <0.1 µA standby current, preserving battery life. |
Use Scenario: Supplying bias voltage to MEMS pressure sensor analog front-end in wireless tire-pressure monitors. IC Role / Device Role / Timing Role: Low-current voltage reference establishing sensor excitation level independent of battery decay. Use Value: Maintains sensor linearity over 2.0–3.6 V battery range with <100 ppm/°C drift contribution due to +3.8 mV/K TC. |
| Infotainment System ESD Clamp | Industrial PLC Input Protection |
Use Scenario: Protecting HDMI or USB data lines in automotive head units from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-switching Zener shunt absorbing ESD pulses while minimizing signal distortion. Use Value: Leverages optimized leakage behavior to reduce jitter and improve signal integrity during clamping. |
Use Scenario: Guarding 24 V digital input channels in programmable logic controllers against field-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage limiter clamping transients to 9.1 V before reaching downstream protection ICs. Use Value: Provides first-stage clamping with 250 mW steady-state rating and 40 W non-repetitive surge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1,115 | Same 9.1 V, ±5 %, SOT23 package but not AEC-Q101 qualified; higher typical rdiff (120 Ω vs. 100 Ω) | Limited to industrial/commercial grade; unsuitable for automotive safety-critical monitoring | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs thermal performance margin |
| MMSZ5240B-TP | 9.1 V, ±5 %, SOD-123 package; 500 mW rating but larger footprint; rdiff = 150 Ω at 20 mA | Higher power handling but incompatible with fine-pitch SOT23 layouts; no automotive qualification | Choose only if board layout allows SOD-123 and >250 mW continuous dissipation is required |
Compared with BZX8450-C9V1-QR, the BZX84-C9V1,115 lacks automotive qualification and has higher impedance, while MMSZ5240B-TP trades compactness and qualification for higher power capacity in a less space-efficient package.
Availability
BZX8450-C9V1-QR is available at Aetrix Electronics and suitable for automotive ECU monitoring, portable sensor biasing, and industrial input protection requiring stable component supply with AEC-Q101 assurance.
Supply support for BZX8450-C9V1-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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and energy-efficient solutions.
The BZX8450-Q series belongs to Nexperia's automotive-grade Zener diode product line, engineered specifically for low-current voltage regulation and transient suppression in harsh-environment vehicle electronics.
FAQ
What is the maximum reverse voltage this diode can withstand continuously?
The BZX8450-C9V1-QR is rated for continuous reverse operation up to its nominal Zener voltage of 9.1 V, with absolute maximum reverse voltage limited by the 250 mW power dissipation ceiling. At ambient temperatures ≤25 °C on standard FR4, sustained reverse bias above 9.56 V risks exceeding thermal limits and permanent degradation.
Is Pin 2 electrically functional or should it be left unconnected?
Pin 2 is explicitly designated "not connected" (n.c.) in the official Nexperia pinning diagram and must remain unconnected in circuit design and PCB layout. No internal bond wire or silicon connection exists-soldering or routing to this terminal introduces risk of mechanical stress or unintended parasitic coupling.
How does the ±5 % tolerance affect regulation accuracy in a 12 V automotive system?
With a 9.1 V nominal rating and ±5 % tolerance, the actual Zener voltage falls between 8.65 V and 9.56 V. In a 12 V system, this ensures robust clamping below critical thresholds (e.g., MCU reset levels), while allowing sufficient headroom to avoid false triggering during normal supply ripple or cold-cranking dips.
Can this diode replace a 1N4739A in an existing design?
No-while both regulate near 9.1 V, the 1N4739A is a 1 W through-hole Zener in DO-41 package with different thermal characteristics, higher test current (31 mA), and no AEC-Q101 qualification. Substitution would require revalidation of power derating, PCB layout, and automotive compliance testing.
BZX8450-C9V1-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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 6.9 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-C9V1-QR FAQ
1.How can I place an order for BZX8450-C9V1-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C9V1-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-C9V1-QR reliable?
The price and inventory of BZX8450-C9V1-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-C9V1-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-C9V1-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C9V1-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C9V1-QR?
BZX8450-C9V1-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C9V1-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-C9V1-QR?
For technical support, including BZX8450-C9V1-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C9V1-QR requirements.
6.How does Aetrix verify that BZX8450-C9V1-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-C9V1-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-C9V1-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-C9V1-QR?
All BZX8450-C9V1-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C9V1-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-C9V1-QR part is unused and in its original packaging.
Return procedure for BZX8450-C9V1-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C9V1-QR Tags
-
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
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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