My Inquiry
My Account
Nexperia USA Inc. BZX8450-C75-QVL
- Part No.:
- BZX8450-C75-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C75-QVL.pdf
- Description:
- DIODE ZENER 75V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,589
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX8450-C75-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, designed for precision biasing and voltage reference in automotive and portable electronics. It delivers a nominal 75 V Zener voltage at 50 µA test current, with ±5 % tolerance, 250 mW total power dissipation, and AEC-Q101 qualification for under-hood applications.
For engineers reviewing the BZX8450-C75-QVL datasheet, BZX8450-C75-QVL pinout, BZX8450-C75-QVL application, or BZX8450-C75-QVL equivalent, this device is selected for low-leakage, high-voltage stabilization where thermal stability (SZ = +3.8 mV/K), low capacitance (Cd = 40 pF @ 1 MHz), and fast transient response are critical in battery-powered sensor interfaces and ECU power-rail monitoring.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 75 V (min 72 V, max 78 V) at IZ = 50 µA, exhibiting a positive temperature coefficient of +3.8 mV/K - enabling predictable drift compensation in wide-temperature automotive environments. Its differential resistance is 400 Ω at IZ = 2 mA, supporting stable regulation under light-load conditions.
The device features intentional leakage optimization per AN90031 for reduced noise and faster switching recovery, validated by non-repetitive peak reverse power dissipation up to 40 W (tp = 100 µs). It is mounted on FR4 PCB with single-sided 70 µm copper, achieving Rth(j-a) = 500 K/W and Rth(j-sp) = 330 K/W for reliable thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal (72–78 V range at IZ = 50 µA); enables precise high-voltage rail clamping in 60–80 V systems |
| Tolerance | ±5 % (C-series); ensures consistent voltage setting across production batches without trimming |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C; supports continuous operation in compact SOT23 footprint with derating above 25 °C |
| Reverse Current (IR) | ≤ 0.05 µA at VR = 72 V; guarantees ultra-low standby leakage in always-on automotive modules |
| Diode Capacitance | 40 pF at VR = 0 V, f = 1 MHz; minimizes signal coupling in high-frequency sensing circuits |
| Temperature Coefficient | +3.8 mV/K; provides predictable, linear VZ drift for temperature-compensated reference designs |
| Forward Voltage | 0.9 V max at IF = 10 mA; ensures low-loss forward conduction during transient overvoltage events |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), rated for −55 °C to +150 °C ambient operation and qualified to AEC-Q101.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Connected to lower-potential node; reverse-biased during regulation; requires current-limiting resistor |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or solder mask bridging allowed |
| 3 | Cathode (K) | Connected to higher-potential node; carries regulated output voltage; serves as thermal path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low-test-current specification | Rated at 50 µA - enables stable regulation in micro-power sensor bias networks without loading source |
| AEC-Q101 qualification | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock |
| Optimized leakage profile | Intentional minor IR rise per AN90031 - reduces switching noise and improves transient response time |
| High-voltage Zener range | Up to 75 V (C-series) - supports modern 48 V mild-hybrid and legacy 72 V telecom backup systems |
| Thermal resistance control | Rth(j-sp) = 330 K/W to cathode solder point - enables direct thermal coupling to PCB copper for sustained 250 mW operation |
Applications
| Automotive ECU Power Monitoring | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Monitoring 72 V battery rail in 48 V mild-hybrid vehicle ECUs to detect overvoltage faults before MOSFET gate driver damage. IC Role / Device Role / Timing Role: Zener clamp protecting ADC input and supervisor IC; operates continuously in reverse-bias mode. Use Value: 75 V ±5 % tolerance ensures trip threshold stays within 72–78 V window; 0.05 µA IR prevents false triggering during sleep mode. |
Use Scenario: Providing stable 75 V bias for piezoelectric pressure sensor excitation in oil-field downhole tools operating at 125 °C. IC Role / Device Role / Timing Role: High-voltage reference element in analog front-end; paired with low-drift op-amp for ratiometric scaling. Use Value: +3.8 mV/K SZ allows predictable calibration offset correction; 40 pF capacitance avoids resonance with 100 kΩ sensor impedance. |
| Portable Medical Pulse Oximeter | Telecom Backup Power Clamp |
Use Scenario: Regulating LED drive voltage in battery-powered pulse oximeters where 75 V transient suppression protects analog photodiode amplifier. IC Role / Device Role / Timing Role: Transient voltage suppressor and DC reference; activated only during ESD or load-dump events. Use Value: 40 W non-repetitive surge rating (tp = 100 µs) absorbs IEC 61000-4-2 contact discharge without degradation. |
Use Scenario: Clamping 75 V backup supply rail in telecom base station power modules during AC line surges or rectifier failure. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining voltage setpoint while sinking up to 200 mA fault current. Use Value: 250 mW continuous rating with 500 K/W junction-to-ambient resistance enables passive cooling on standard FR4 PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BZX84-C75LT1G | Same 75 V, ±5 %, SOT23; but higher IR (0.1 µA @ 72 V) and no AEC-Q101 qualification | Limited to industrial/commercial use; unsuitable for automotive due to missing stress-test validation | Select when cost sensitivity outweighs automotive compliance requirements |
| Vishay BZX84-C75-TP | Identical VZ and tolerance; slightly lower Cd (35 pF) but higher rdiff (450 Ω at 2 mA) | Better HF noise rejection but slower regulation response under dynamic load steps | Prefer for RF-adjacent applications where capacitance dominates over regulation speed |
Compared with BZX8450-C75-QVL, the STMicro part lacks automotive qualification and has higher leakage, while the Vishay variant trades lower capacitance for higher dynamic impedance - making the Nexperia device optimal for AEC-Q101-compliant, low-noise, thermally constrained 75 V reference designs.
Availability
BZX8450-C75-QVL is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor biasing, portable medical instrumentation, and telecom backup power requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZX8450-C75-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 energy-efficient solutions.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage reference and overvoltage protection in harsh-environment automotive and industrial systems.
FAQ
What is the maximum reverse voltage the BZX8450-C75-QVL can withstand before breakdown?
The BZX8450-C75-QVL is specified with a nominal Zener voltage of 75 V at 50 µA test current, with a guaranteed minimum breakdown voltage of 72 V and maximum of 78 V. Its absolute maximum non-repetitive peak reverse voltage is defined by the 40 W surge rating at tp = 100 µs - not a fixed DC voltage limit. Continuous operation must remain within the 72–78 V regulation band under controlled current.
Does the 'QVL' suffix indicate tape-and-reel packaging or a specific quality grade?
The 'QVL' suffix denotes Nexperia's automotive-grade qualification level: 'Q' confirms AEC-Q101 compliance, 'V' indicates voltage tolerance (±5 % for C-series), and 'L' specifies low-leakage optimization per AN90031. It is not a packaging code - the device ships in standard SOT23 tape-and-reel per ordering code BZX8450-C75-QVL,115 (7-inch reel, 3000 units).
Can BZX8450-C75-QVL replace older BZX84-C75 variants in existing designs?
Yes, with verification: BZX8450-C75-QVL maintains identical pinout, voltage rating, and SOT23 footprint as legacy BZX84-C75 parts, but adds AEC-Q101 qualification, tighter thermal resistance control (Rth(j-sp) = 330 K/W), and optimized leakage behavior. Layout changes are unnecessary, though system-level validation of transient response and long-term reliability under automotive stress profiles is recommended.
Why does the datasheet list Pin 2 as 'n.c.' instead of omitting it entirely?
Pin 2 is physically present in the SOT23 mold compound but internally unconnected - a deliberate design choice to maintain mechanical symmetry, improve die attach stability, and ensure consistent reflow soldering behavior across all BZX8450-Q variants. Leaving it unconnected avoids parasitic coupling while preserving package robustness and thermal uniformity during assembly.
BZX8450-C75-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:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 255 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 52.5 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-C75-QVL FAQ
1.How can I place an order for BZX8450-C75-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C75-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-C75-QVL reliable?
The price and inventory of BZX8450-C75-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-C75-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C75-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C75-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C75-QVL?
BZX8450-C75-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C75-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-C75-QVL?
For technical support, including BZX8450-C75-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C75-QVL requirements.
6.How does Aetrix verify that BZX8450-C75-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C75-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-C75-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C75-QVL?
All BZX8450-C75-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C75-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-C75-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C75-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C75-QVL 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…
