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Nexperia USA Inc. BZX38450-C62-QX
- Part No.:
- BZX38450-C62-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C62-QX.pdf
- Description:
- DIODE ZENER 62V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:4,951
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Product details
Overview
BZX38450-C62-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 62 V nominal working voltage with ±5 % tolerance, 300 mW total power dissipation, and specified at 50 µA test current - optimized for low-bias regulation in automotive body electronics and portable battery-powered sensor interfaces.
For engineers reviewing the BZX38450-C62-QX datasheet, BZX38450-C62-QX pinout, BZX38450-C62-QX application, or BZX38450-C62-QX equivalent, key selection criteria include its AEC-Q101 qualification, low-leakage reverse characteristics at VR = 51 V, thermal resistance of 110 K/W to solder point, and intentional leakage tuning for noise reduction per AN90031.
Technical Context
This device operates as a precision shunt voltage reference in reverse-biased mode, with differential resistance ≤ 400 Ω at IZ = 2 mA and temperature coefficient of +0.05 mV/K across its 62 V nominal range. Its low 50 µA test current enables stable regulation in micro-power circuits where bias current must remain below 100 µA.
The BZX38450-C62-QX features intentionally elevated reverse leakage (≤ 0.05 µA at VR = 51 V) to improve transient response and reduce switching noise - a design trade-off validated in automotive-grade applications per AEC-Q101 stress testing including HTGB, HTRB, and temperature cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 62 V ±5 % - defines regulated output voltage under 2 mA test current; supports 51 V maximum reverse operating voltage in system-level clamp designs. |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C - limits continuous DC power handling on standard FR4 PCB; requires thermal derating above 25 °C ambient. |
| Test Current | 50 µA - enables ultra-low quiescent current regulation ideal for battery-backed real-time clocks and low-power MCU reset circuits. |
| Differential Resistance | ≤ 400 Ω at IZ = 2 mA - determines output impedance and load regulation error; lower rdiff improves voltage stability under varying load currents. |
| Junction Temperature | −55 °C to +150 °C - ensures operation across full automotive under-hood temperature range without derating loss of regulation accuracy. |
| Reverse Leakage | ≤ 0.05 µA at VR = 51 V - intentionally elevated vs. standard Zeners to suppress high-frequency noise and accelerate turn-on during transients. |
| Forward Voltage | 0.9 V at IF = 10 mA - defines anode-to-cathode drop during forward conduction; used in polarity protection or OR-ing configurations. |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package: 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal; carries reverse current during regulation. |
| 2 | Anode (A) | Connected to ground or low-impedance return path; completes shunt regulation loop; must be thermally anchored for reliable 110 K/W Rth(j-sp). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use via HTGB, HTRB, and temperature cycling - eliminates need for additional qualification testing in Tier-1 ECU designs. |
| Low 50 µA test current | Enables regulation in sub-100 µA bias networks - critical for energy harvesting nodes and coin-cell-powered IoT sensors. |
| Optimized leakage profile | Controlled 0.05 µA IR at VR = 51 V reduces switching noise and improves transient response vs. legacy Zeners per AN90031. |
| SOD323 footprint | Standardized 1.3 mm pitch allows automated placement and reflow compatibility with mainstream SMT lines; 0.95 mm height supports low-profile assemblies. |
| ±5 % voltage tolerance | Supports cost-sensitive automotive interior modules where tight regulation is secondary to reliability and supply chain stability. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping for LIN bus transceiver I/O pins exposed to load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection and reference stabilization for analog front-end comparators. Use Value: AEC-Q101 qualification ensures survival under ISO 7637-2 Pulse 5a; 62 V rating provides 11 V margin above worst-case 51 V clamp threshold. |
Use Scenario: Precision biasing of MEMS pressure sensor bridge in 4–20 mA loop-powered transmitter. IC Role / Device Role / Timing Role: Low-current Zener reference establishing stable excitation voltage independent of loop current variation. Use Value: 50 µA test current minimizes burden on 3.3 V LDO supplying sensor; ±5 % tolerance aligns with 0.5 % total system accuracy budget. |
| Portable Medical Wearable | Smart Energy Meter RTC Backup |
Use Scenario: Regulating voltage for ultra-low-power pulse oximeter LED driver IC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Primary voltage reference enabling consistent LED current control across battery discharge curve. Use Value: 300 mW power limit prevents thermal runaway during brief 10 mA LED pulses; SOD323 size fits constrained wearable PCB area. |
Use Scenario: Maintaining accurate timekeeping in electricity meter during main power outage using supercapacitor backup. IC Role / Device Role / Timing Role: Low-leakage shunt regulator stabilizing RTC supply rail while minimizing supercapacitor self-discharge. Use Value: 0.05 µA reverse leakage extends 10 F supercapacitor hold-up time by >12 hours vs. standard Zener alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C62 | Non-AEC-Q101; same 62 V ±5 %, 300 mW, but lacks automotive qualification and intentional leakage tuning. | Restricted to industrial/commercial use only; unsuitable for automotive ECUs or safety-critical subsystems. | Select when AEC-Q101 is not required and cost is primary driver; verify thermal performance on non-standard PCBs. |
| MMSZ5262B-TP | 62 V ±5 %, 500 mW rating, SOD-123 package; higher power but larger footprint and no AEC-Q101 certification. | Acceptable for non-automotive consumer devices needing higher surge tolerance; incompatible with SOD323 layout. | Choose only if board space permits SOD-123 and 500 mW headroom is needed for transient absorption beyond steady-state regulation. |
Compared with BZX38450-C62-QX, BZX384-C62 omits automotive qualification and noise-optimized leakage, while MMSZ5262B-TP trades AEC-Q101 compliance and compact size for higher power and non-compatible packaging - making the QX variant uniquely suited for space-constrained, certified automotive signal conditioning.
Availability
BZX38450-C62-QX is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical wearables, and smart energy meter RTC backup requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX38450-C62-QX 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.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, engineered specifically for low-power, noise-sensitive automotive and industrial voltage reference applications where reliability and small form factor are critical.
FAQ
What is the maximum reverse voltage the BZX38450-C62-QX can safely clamp?
The device is rated for a maximum reverse operating voltage (VR) of 51 V per Table 8, with a nominal Zener voltage of 62 V. It sustains non-repetitive peak reverse power up to 40 W for 100 µs pulses, but continuous reverse bias must remain ≤ 51 V to avoid exceeding limiting values and ensure long-term reliability.
Does the "C" in BZX38450-C62-QX indicate tighter tolerance than "B" variants?
Yes - the "C" suffix denotes ±5 % tolerance at IZ = 2 mA, whereas "B" variants offer ±2 % tolerance. For BZX38450-C62-QX, this means a guaranteed VZ range of 58.9 V to 65.1 V at 25 °C, balancing cost and precision for automotive interior modules where absolute accuracy is secondary to robustness.
How does the intentional leakage current improve noise performance?
Per AN90031, the elevated reverse leakage (≤ 0.05 µA at VR = 51 V) reduces junction capacitance modulation during fast transients, suppressing high-frequency ringing and improving settling time in feedback loops - verified in LIN bus ESD immunity testing and sensor reference stability measurements.
Can BZX38450-C62-QX replace older BZX55 or BZX79 series Zeners in existing designs?
No direct replacement - BZX38450-C62-QX uses SOD323 packaging (1.7 mm × 1.25 mm), while BZX55/BZX79 use DO-35 or DO-41 through-hole packages. Electrical behavior differs due to lower test current (50 µA vs. 5 mA) and optimized leakage; redesign of bias network and PCB layout is required for migration.
BZX38450-C62-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX38450-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 215 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 43.4 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:
- SOD-323
BZX38450-C62-QX FAQ
1.How can I place an order for BZX38450-C62-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C62-QX 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 BZX38450-C62-QX reliable?
The price and inventory of BZX38450-C62-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C62-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C62-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C62-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C62-QX?
BZX38450-C62-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C62-QX 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 BZX38450-C62-QX?
For technical support, including BZX38450-C62-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C62-QX requirements.
6.How does Aetrix verify that BZX38450-C62-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C62-QX 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 BZX38450-C62-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C62-QX?
All BZX38450-C62-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C62-QX, 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 BZX38450-C62-QX part is unused and in its original packaging.
Return procedure for BZX38450-C62-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C62-QX Tags
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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
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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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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