My Inquiry
My Account
Nexperia USA Inc. BZX8450-B7V5-QR
- Part No.:
- BZX8450-B7V5-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-B7V5-QR.pdf
- Description:
- DIODE ZENER 7.5V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,972
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX8450-B7V5-QR from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 7.5 V nominal regulation at 50 µA test current, with ±2 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for automotive bias rail stabilization.
For engineers reviewing the BZX8450-B7V5-QR datasheet, BZX8450-B7V5-QR pinout, BZX8450-B7V5-QR application, or BZX8450-B7V5-QR equivalent, this device serves as a precision, low-leakage voltage reference in battery-powered sensor nodes, ECU voltage monitoring circuits, and low-power microcontroller reset supervision where stable 7.5 V clamping under light load is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 7.35 V to 7.65 V at IZ = 50 µA, exhibiting a temperature coefficient of +2.5 mV/K and differential resistance of ≤80 Ω at IZ = 5 mA. Its intentional minor leakage rise improves switching speed and noise performance per AN90031.
Designed for low-bias operation, it delivers stable regulation down to 50 µA test current and supports ambient temperatures from −55 °C to +150 °C, with junction-to-ambient thermal resistance of 500 K/W on FR4 PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 7.5 V (regulated output at 50 µA; min/max 7.35 V / 7.65 V) |
| Tolerance | ±2 % (tight regulation band suitable for precision biasing) |
| Test Current | 50 µA (enables ultra-low quiescent current operation in portable systems) |
| Max Power Dissipation | 250 mW (at Tamb ≤ 25 °C on standard FR4 PCB) |
| Differential Resistance | ≤80 Ω at IZ = 5 mA (low dynamic impedance ensures stable regulation under varying load) |
| Temp Coefficient | +2.5 mV/K (positive drift enables predictable voltage shift over temperature) |
| Reverse Leakage | ≤0.1 µA at VR = 5.7 V (ultra-low standby current preserves battery life) |
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) | Connected to lower-potential side of bias network; reverse-biased during regulation |
| 2 | Not Connected (n.c.) | Electrically isolated; no internal connection - must remain unconnected in layout |
| 3 | Cathode (K) | Connected to regulated voltage node; carries reverse current during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables use in µA-level bias rails without compromising regulation accuracy |
| Optimized leakage profile | Intentional minor leakage rise reduces switching transients and high-frequency noise in sensing paths |
| AEC-Q101 qualification | Validated for automotive under-hood and control module applications with full stress testing |
| Tight voltage tolerance | ±2 % ensures consistent 7.5 V reference across production lots without post-assembly trimming |
| SOT23 footprint compatibility | Standard 3-pin SOT23 layout supports automated placement and reflow, minimizing board space vs. larger packages |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Providing stable 7.5 V reference to analog front-end of engine coolant temperature sensor in engine control unit. IC Role / Device Role / Timing Role: Zener voltage reference for ADC input scaling and op-amp biasing in signal conditioning circuitry. Use Value: Maintains <±0.15 V regulation over −40 °C to +125 °C, ensuring sensor linearity and reducing calibration drift. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontroller in ADAS camera module. IC Role / Device Role / Timing Role: Reverse-biased Zener feeding comparator input to detect brown-out conditions below 7.5 V supply rail. Use Value: Enables deterministic reset assertion at 7.5 V ±0.15 V with sub-µA standby draw, extending sleep-mode battery life. |
| Portable Gas Detector Reference | Industrial I/O Module Protection |
|
Use Scenario: Supplying regulated bias to electrochemical gas sensor amplifier in handheld CO detector. IC Role / Device Role / Timing Role: Low-current Zener shunt regulator establishing fixed reference for transimpedance amplifier feedback. Use Value: Delivers stable 7.5 V at 50 µA, minimizing self-heating and enabling <1 ppm/°C measurement stability. |
Use Scenario: Clamping transient overvoltage on 24 V industrial analog input channel before signal conditioning IC. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting input to 7.5 V during ESD or surge events. Use Value: With 80 Ω dynamic impedance and 0.1 µA leakage at 5.7 V, it provides low-disturbance protection without loading normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5236BS-7-F | 7.5 V, ±5 % tolerance, 200 mW rating, SOT23 package, no AEC-Q101 qualification | Lower power rating and wider tolerance limit use in non-automotive, cost-sensitive consumer designs | Select when AEC-Q101 compliance is unnecessary and ±5 % regulation is acceptable for system margin |
| Vishay BZX84-C7V5-TP | 7.5 V, ±5 % tolerance, 300 mW rating, SOT23, AEC-Q101 qualified but higher leakage (≤1 µA at 5.7 V) | Higher power handling suits higher-current bias networks, but elevated leakage increases standby loss | Prefer for applications needing >250 mW headroom where leakage impact is mitigated by active power management |
Compared with MMBZ5236BS-7-F, BZX8450-B7V5-QR offers tighter ±2 % tolerance and AEC-Q101 validation; versus BZX84-C7V5-TP, it delivers lower leakage and optimized noise performance at the expense of 50 mW lower power rating.
Availability
BZX8450-B7V5-QR is available at Aetrix Electronics and suitable for automotive ECU design, portable sensor modules, and industrial I/O protection requiring stable component supply with AEC-Q101 assurance and tight voltage tolerance.
Supply support for BZX8450-B7V5-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 efficient manufacturing.
The BZX8450-Q series belongs to Nexperia's automotive-grade Zener regulator portfolio, engineered specifically for low-current, low-noise voltage reference and clamping in safety-critical and battery-constrained systems.
FAQ
What is the maximum reverse current at 5.7 V for BZX8450-B7V5-QR?
The maximum reverse current (leakage) is 0.1 µA at VR = 5.7 V and Tj = 25 °C, as specified in Table 8 of the datasheet. This ultra-low leakage supports extended battery life in always-on sensor applications and minimizes error in high-impedance reference networks.
Can BZX8450-B7V5-QR be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients and mismatched breakdown voltages, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or an active regulator solution instead.
Is the n.c. pin (pin 2) required to be grounded or left floating?
Pin 2 is internally not connected and must remain unconnected in both schematic and PCB layout. Grounding or routing it risks unintended coupling, mechanical stress, or solder bridging - the datasheet explicitly defines it as "not connected" with no electrical function.
How does the +2.5 mV/K temperature coefficient affect long-term voltage stability?
The +2.5 mV/K coefficient means the Zener voltage increases by 2.5 mV per Kelvin rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient), this yields ~250 mV drift - compensated in precision systems via calibration or ratiometric ADC architectures using the same reference.
BZX8450-B7V5-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):
- 7.5 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 5.7 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-B7V5-QR FAQ
1.How can I place an order for BZX8450-B7V5-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-B7V5-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-B7V5-QR reliable?
The price and inventory of BZX8450-B7V5-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-B7V5-QR is usually 5 days.
3.What payment methods are accepted for BZX8450-B7V5-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-B7V5-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-B7V5-QR?
BZX8450-B7V5-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-B7V5-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-B7V5-QR?
For technical support, including BZX8450-B7V5-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-B7V5-QR requirements.
6.How does Aetrix verify that BZX8450-B7V5-QR is sourced from the original manufacturer or authorized distributors?
All BZX8450-B7V5-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-B7V5-QR meets industry standards.
7.What is the process for return or replacement of BZX8450-B7V5-QR?
All BZX8450-B7V5-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-B7V5-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-B7V5-QR part is unused and in its original packaging.
Return procedure for BZX8450-B7V5-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-B7V5-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
