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Nexperia USA Inc. BZX8450-B5V6-QR
- Part No.:
- BZX8450-B5V6-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B5V6-QR.pdf
- Description:
- DIODE ZENER 5.6V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,828
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Product details
Overview
BZX8450-B5V6-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 5.6 V nominal regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive bias and reference applications.
For engineers reviewing the BZX8450-B5V6-QR datasheet, BZX8450-B5V6-QR pinout, BZX8450-B5V6-QR application, or BZX8450-B5V6-QR equivalent, this part serves as a precision low-power voltage reference in battery-powered sensor nodes, ECU voltage monitoring circuits, and I/O level-shifting clamps where stable 5.6 V regulation at microampere bias is required.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable 5.6 V reverse breakdown voltage across its cathode–anode terminals under controlled current conditions. Its specified differential resistance of 400 Ω at 5 mA enables predictable impedance behavior in feedback paths.
The intentional minor leakage current optimization (per AN90031) reduces switching noise and improves transient response in low-current bias networks, while the −2.0 mV/K temperature coefficient ensures minimal drift over −55 °C to +150 °C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 5.6 V at IZ = 50 µA - defines precise regulation point for low-bias reference circuits |
| Tolerance | ±2 % - ensures tight voltage accuracy without post-production trimming |
| Differential Resistance | 400 Ω at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Temperature Coefficient | −2.0 mV/K - quantifies voltage drift per degree Celsius for thermal stability analysis |
| Forward Voltage | 0.9 V at IF = 10 mA - sets forward conduction threshold for polarity-sensitive protection |
| Total Power Dissipation | 250 mW at Tamb ≤ 25 °C - limits maximum continuous operating power on standard FR4 PCB |
| Junction Temperature | 150 °C - defines absolute thermal limit for reliability in under-hood automotive environments |
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 use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connects to lower-potential node in reverse-biased Zener configuration; carries forward current when forward-biased |
| 2 | Not Connected (n.c.) | Internally unconnected terminal; must remain floating-no PCB trace or solder connection permitted |
| 3 | Cathode (K) | Connects to higher-potential node in Zener mode; serves as voltage reference output node in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables direct use in ultra-low-power battery monitoring without burdening source |
| Optimized leakage profile | Intentional minor rise per AN90031 - reduces high-frequency noise and improves switching stability in digital interface clamps |
| AEC-Q101 qualification | Qualified for automotive applications - guarantees reliability under thermal cycling, humidity, and mechanical stress per automotive standards |
| Small-footprint SOT23 | 2.9 mm × 1.3 mm footprint - supports high-density PCB layouts in space-constrained ECUs and ADAS modules |
Applications
| Automotive ECU Reference | Portable Sensor Biasing |
|---|---|
Use Scenario: Providing stable 5.6 V reference for analog-to-digital converter (ADC) input scaling in engine control units. IC Role / Device Role / Timing Role: Shunt voltage reference regulating supply rail for precision ADC front-end circuitry. Use Value: Maintains <±2 % voltage accuracy over temperature and lifetime, ensuring consistent sensor measurement resolution without calibration drift. |
Use Scenario: Biasing MEMS pressure sensor ICs in wireless tire-pressure monitoring systems (TPMS). IC Role / Device Role / Timing Role: Low-current Zener clamp establishing regulated excitation voltage for piezoresistive bridge elements. Use Value: Draws only 50 µA at regulation point, extending coin-cell battery life beyond 5 years in standby operation. |
| I/O Level Translation Clamp | Power-Rail Overvoltage Protection |
Use Scenario: Clamping 5 V logic signals to prevent overvoltage damage to 3.3 V microcontroller GPIO pins. IC Role / Device Role / Timing Role: Bidirectional transient suppressor acting as voltage limiter during hot-swap or ESD events. Use Value: Fast turn-on at 5.6 V with 400 Ω dynamic impedance minimizes overshoot and protects downstream logic without signal distortion. |
Use Scenario: Safeguarding 5 V power rails against transient surges in infotainment system DC-DC outputs. IC Role / Device Role / Timing Role: Shunt regulator absorbing excess energy during line transients up to 40 W non-repetitive peak power. Use Value: Withstands 100 µs surges per IEC 61000-4-5 while limiting rail voltage to ≤5.9 V, preventing latch-up in connected SoCs. |
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-C5V6 | ±5 % tolerance, higher leakage at 5 V, no AEC-Q101 qualification | Suitable for cost-sensitive consumer electronics, not automotive-grade designs | Select when AEC-Q101 compliance and ±2 % accuracy are not required |
| MMSZ5232B | Same 5.6 V rating but ±5 % tolerance, 500 mW Ptot, SOD-123 package | Higher power handling but larger footprint and looser tolerance; lacks automotive qualification | Choose only if board layout allows SOD-123 and thermal margin exceeds 250 mW requirement |
Compared with BZX8450-B5V6-QR, the BZX84-C5V6 offers lower cost but sacrifices automotive reliability and voltage precision, while MMSZ5232B trades package size and qualification for higher power headroom-neither provides the combined AEC-Q101, ±2 %, and SOT23 advantages of the original.
Availability
BZX8450-B5V6-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor module development, and industrial I/O interface protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX8450-B5V6-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 advanced packaging technologies.
The BZX8450-Q series belongs to Nexperia's automotive Zener regulator product line, engineered specifically for low-current, high-stability voltage reference and clamping in harsh-environment electronic control units.
FAQ
What is the maximum reverse current at 5.6 V before regulation onset?
At 5.6 V reverse bias and Tj = 25 °C, the typical reverse current is 2.0 µA per Table 8. This low leakage ensures minimal quiescent power draw in always-on sensor bias circuits and avoids loading sensitive voltage dividers in precision references.
Can BZX8450-B5V6-QR be used in series with another Zener for higher voltage regulation?
No-this device is not designed for series stacking. Its 250 mW power rating assumes single-device operation; cascading would cause unequal current sharing and thermal runaway due to mismatched temperature coefficients and dynamic impedances.
Is the n.c. pin 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 must remain unconnected on PCB; soldering or routing to it may compromise mechanical integrity and thermal performance.
How does the −2.0 mV/K temperature coefficient affect long-term stability in under-hood environments?
Over a −40 °C to +125 °C junction range, the Zener voltage shifts by approximately ±340 mV, resulting in ±6.1 % deviation from nominal 5.6 V. System-level compensation or ratiometric ADC referencing is recommended for sub-1 % total error budgets.
BZX8450-B5V6-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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX8450-B5V6-QR FAQ
1.How can I place an order for BZX8450-B5V6-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B5V6-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-B5V6-QR reliable?
The price and inventory of BZX8450-B5V6-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-B5V6-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B5V6-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B5V6-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B5V6-QR?
BZX8450-B5V6-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B5V6-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-B5V6-QR?
For technical support, including BZX8450-B5V6-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B5V6-QR requirements.
6.How does Aetrix verify that BZX8450-B5V6-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B5V6-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-B5V6-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B5V6-QR?
All BZX8450-B5V6-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B5V6-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-B5V6-QR part is unused and in its original packaging.
Return procedure for BZX8450-B5V6-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B5V6-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
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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