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Nexperia USA Inc. BZX8450-C68-QVL
- Part No.:
- BZX8450-C68-QVL
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX8450-C68-QVL.pdf
- Description:
- DIODE ZENER 68V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,325
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Product details
Overview
BZX8450-C68-QVL from Nexperia is a low-current Zener voltage regulator diode in SOT23 package, rated for 68 V nominal working voltage with ±5 % tolerance, 250 mW total power dissipation, and specified at 50 µA test current-ideal for precision biasing and low-power automotive sensor interfaces.
For engineers reviewing the BZX8450-C68-QVL datasheet, BZX8450-C68-QVL pinout, BZX8450-C68-QVL application, or BZX8450-C68-QVL equivalent, this device serves as a stable, AEC-Q101-qualified voltage reference in battery-constrained systems where leakage control and thermal stability under ambient extremes (−55 °C to +150 °C) are critical selection criteria.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal 68 V regulation voltage at IZ = 50 µA, exhibiting a temperature coefficient of +11.2 mV/K and differential resistance of ≤ 400 Ω at IZ = 2 mA. Its design targets low-bias operation with minimal leakage-critical for standby circuits and automotive microcontroller reset supervision.
Qualified per AEC-Q101, it supports junction temperatures up to 150 °C and features a thermal resistance of 330 K/W from junction to solder point, enabling reliable performance on FR4 PCBs with standard SOT23 footprint without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 68 V at IZ = 50 µA - defines precise regulation point for high-voltage reference rails |
| Tolerance | ±5 % - ensures predictable voltage margin in automotive-grade designs requiring robustness over temperature |
| Power Dissipation | 250 mW at Tamb ≤ 25 °C - limits self-heating in compact SMT layouts with minimal copper area |
| Forward Voltage | ≤ 0.9 V at IF = 10 mA - enables low-loss anode-cathode conduction during forward bias events |
| Reverse Leakage | ≤ 0.05 µA at VR = 51 V - minimizes quiescent current in always-on monitoring circuits |
| Thermal Resistance | 330 K/W (junction-to-solder point) - allows accurate thermal modeling for reliability prediction on standard FR4 |
| Operating Temperature | −55 °C to +150 °C - supports under-hood automotive deployment without derating |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), optimized for automated placement and reflow compatibility on standard FR4 PCBs.
| 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 mask required |
| 3 | Cathode (K) | Reverse-biased terminal; ties to regulated output node and provides primary heat path to PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor power domains |
| Low test current specification | Rated at 50 µA-enables stable regulation in µA-level bias networks typical of portable and battery-backed systems |
| Controlled leakage profile | Intentional minor leakage rise (per AN90031) reduces switching noise in fast-transient detection circuits |
| High-temperature capability | 150 °C max junction temperature supports operation in proximity to power electronics without thermal derating |
Applications
| Automotive Sensor Biasing | Microcontroller Reset Supervision |
|---|---|
|
Use Scenario: Providing stable reference voltage to analog front-ends of pressure/temperature sensors in engine control units. IC Role / Device Role / Timing Role: Zener voltage reference establishing fixed threshold for ADC input scaling and signal conditioning. Use Value: ±5 % tolerance and −55 °C to +150 °C operation ensure consistent sensor accuracy across full vehicle thermal envelope. |
Use Scenario: Monitoring main supply rail (e.g., 65–70 V battery system) to trigger MCU reset during undervoltage events. IC Role / Device Role / Timing Role: Precision voltage threshold detector enabling deterministic reset assertion at defined 68 V ±5 % window. Use Value: Low 50 µA test current minimizes loading on high-impedance monitoring dividers, preserving battery life in sleep modes. |
| Industrial IoT Node Protection | Low-Power Analog Signal Clamping |
|
Use Scenario: Protecting RS-485 transceiver inputs against transient overvoltage in remote telemetry nodes powered by solar-charged batteries. IC Role / Device Role / Timing Role: Overvoltage clamp limiting bus voltage to 68 V during ESD or surge events. Use Value: 250 mW power rating and 330 K/W junction-to-solder-point thermal resistance enable reliable energy absorption without thermal runaway. |
Use Scenario: Constraining op-amp input swing in battery-powered instrumentation amplifiers to prevent saturation or damage. IC Role / Device Role / Timing Role: Bidirectional clamping element (anode-to-ground, cathode-to-rail) defining safe input voltage bounds. Use Value: ≤0.9 V forward drop ensures minimal forward-path distortion while maintaining tight 68 V reverse-limit precision. |
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-C68,115 (Nexperia) | Same 68 V, ±5 %, SOT23 package but not AEC-Q101 qualified; higher typical leakage (0.1 µA vs. 0.05 µA) | Restricted to industrial/commercial use; unsuitable for automotive safety-critical domains | Select only when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs long-term reliability requirements |
| MMSZ5263ET1G (onsemi) | 68 V, ±5 %, SOD-123 package; 500 mW rating but larger footprint and 600 K/W Rth(j-a) | Requires more PCB area and exhibits poorer thermal coupling-less suitable for dense automotive modules | Prefer when higher surge power handling is needed and board space permits larger package |
Compared with BZX8450-C68-QVL, the BZX84-C68,115 lacks automotive qualification and has looser leakage control, while the MMSZ5263ET1G trades smaller size and better thermal performance for increased footprint and reduced thermal efficiency-making the QVL variant optimal for space-constrained, thermally demanding automotive applications.
Availability
BZX8450-C68-QVL is available at Aetrix Electronics and suitable for automotive sensor biasing, microcontroller reset supervision, and industrial IoT node protection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZX8450-C68-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 advanced packaging technologies.
The BZX8450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for low-current, high-stability voltage regulation in harsh-environment automotive and industrial electronics.
FAQ
What is the maximum reverse voltage before breakdown for BZX8450-C68-QVL?
The nominal Zener voltage is 68 V at IZ = 50 µA, with a guaranteed range of 64.6 V to 71.4 V (±5 %). Breakdown begins within this band; operation above 71.4 V risks exceeding absolute maximum ratings and may cause irreversible damage.
Can BZX8450-C68-QVL be used in forward conduction mode?
Yes-it functions as a standard silicon diode in forward bias, with VF ≤ 0.9 V at IF = 10 mA. However, its primary design purpose is reverse-biased Zener regulation; forward use is limited to protection or level-shifting roles where low forward drop is secondary to voltage reference accuracy.
How does the "QVL" suffix affect specifications?
The "QVL" suffix denotes Nexperia's automotive-grade variant: it confirms AEC-Q101 qualification, tighter process controls for leakage and temperature coefficient consistency, and extended temperature screening (−55 °C to +150 °C), distinguishing it from commercial-grade equivalents like "115" or "T1G".
Is Pin 2 truly unused, or can it be grounded for EMI reduction?
Pin 2 is internally not connected (n.c.) per datasheet Table 2 and must remain unconnected-grounding it introduces parasitic capacitance and potential leakage paths that degrade Zener accuracy and violate qualification testing conditions. No EMI benefit is documented or validated for this practice.
BZX8450-C68-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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-C68-QVL FAQ
1.How can I place an order for BZX8450-C68-QVL through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX8450-C68-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-C68-QVL reliable?
The price and inventory of BZX8450-C68-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-C68-QVL is usually 5 days.
3.What payment methods are accepted for BZX8450-C68-QVL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX8450-C68-QVL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX8450-C68-QVL?
BZX8450-C68-QVL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX8450-C68-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-C68-QVL?
For technical support, including BZX8450-C68-QVL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX8450-C68-QVL requirements.
6.How does Aetrix verify that BZX8450-C68-QVL is sourced from the original manufacturer or authorized distributors?
All BZX8450-C68-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-C68-QVL meets industry standards.
7.What is the process for return or replacement of BZX8450-C68-QVL?
All BZX8450-C68-QVL units undergo pre-shipment inspection (PSI). If there is an issue with BZX8450-C68-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-C68-QVL part is unused and in its original packaging.
Return procedure for BZX8450-C68-QVL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX8450-C68-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
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