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Nexperia USA Inc. BZX38450-C2V0-QX
- Part No.:
- BZX38450-C2V0-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C2V0-QX.pdf
- Description:
- DIODE ZENER 2V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,635
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Product details
Overview
BZX38450-C2V0-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 2.0 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW total power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C2V0-Q datasheet, BZX38450-C2V0-Q pinout, BZX38450-C2V0-Q application, or BZX38450-C2V0-Q equivalent, key selection criteria include low-bias operation at 50 µA, thermal resistance of 415 K/W (junction-to-ambient), cathode-anode polarity marking, and suitability for battery-powered voltage reference and overvoltage protection in compact automotive ECUs.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable 2.0 V output across load and line variations, specified at IZ = 50 µA - enabling ultra-low quiescent current design in always-on automotive subsystems. Its differential resistance is ≤600 Ω at 5 mA, and temperature coefficient is −3.5 mV/K, ensuring predictable drift under thermal cycling.
The device features intentional leakage optimization per AN90031 for fast switching and noise reduction, and is qualified to AEC-Q101 with junction temperature rating up to 150 °C - confirming robustness in under-hood environments where ambient temperatures reach +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 2.0 V at IZ = 50 µA - defines precise low-voltage reference point for sensor biasing or logic-level clamping |
| Tolerance | ±5 % - supports cost-sensitive automotive applications where tighter tolerance is not required |
| Total Power Dissipation | 300 mW at Tamb ≤ 25 °C - limits thermal derating in FR4 PCB layouts without heatsinking |
| Forward Voltage | ≤0.9 V at IF = 10 mA - ensures minimal forward conduction loss when used bidirectionally or in protection circuits |
| Junction-to-Ambient Thermal Resistance | 415 K/W - dictates maximum allowable power in free-air conditions before exceeding 150 °C junction limit |
| Reverse Current @ VR = 1.0 V | ≤1.0 µA - confirms sharp knee and low leakage below breakdown, critical for standby power integrity |
| Capacitance @ 0 V, 1 MHz | 220 pF - impacts high-frequency noise filtering performance in EMI suppression paths |
Pinout & Package
Package: SOD323 (SC-76), surface-mount plastic package, 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity marker (bar) aligns with this terminal for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current specification | 50 µA Zener test current - enables stable regulation in micro-power systems such as keyless entry receivers and CAN transceiver bias rails |
| AEC-Q101 qualification | Qualified for automotive applications - validated for temperature cycling, humidity, mechanical shock, and ESD per AEC stress test standards |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - improves transient response and reduces broadband noise in voltage reference paths |
| Compact SMD footprint | SOD323 package with 1.7 mm × 1.25 mm area - supports high-density layout in space-constrained modules like body control units and ADAS sensors |
Applications
| Automotive Door Module Voltage Reference | Portable Medical Sensor Biasing |
|---|---|
Use Scenario: Provides stable 2.0 V reference for analog front-end of window position sensing circuit in automotive door control module. IC Role / Device Role / Timing Role: Zener regulator supplying precision bias to op-amp input stage and ADC reference divider network. Use Value: Maintains <±10 mV output stability over −40 °C to +125 °C ambient, meeting ASIL-B functional safety margin for non-safety-critical sensing. |
Use Scenario: Supplies low-noise 2.0 V bias to MEMS pressure sensor in handheld blood oxygen monitor. IC Role / Device Role / Timing Role: Low-current Zener shunt regulating coin-cell powered analog signal chain. Use Value: Draws only 50 µA at regulation, extending CR2032 battery life beyond 12 months in intermittent-use clinical devices. |
| USB-C Port Overvoltage Clamp | Industrial PLC Input Protection |
Use Scenario: Clamps VBUS line to 2.0 V during hot-plug ESD events in USB-C accessory detection circuitry. IC Role / Device Role / Timing Role: Fast-reacting shunt protector placed between CC line and ground to prevent controller latch-up. Use Value: 220 pF capacitance avoids signal integrity degradation on 3 A/5 Gbps USB-C data lines while absorbing 40 W non-repetitive surges. |
Use Scenario: Protects 24 V digital input channel of DIN-rail PLC against induced transients in factory automation wiring. IC Role / Device Role / Timing Role: Pre-regulator limiting voltage seen by downstream TVS and optocoupler input stage. Use Value: Enables cascaded protection architecture that reduces clamping voltage by 1.8 V versus standalone TVS, improving immunity to 2 kV EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C2V0 | Same Zener voltage and SOD323 package but lacks AEC-Q101 qualification and optimized leakage profile | Restricted to commercial-grade consumer electronics; not approved for automotive under-hood use | Select only for cost-sensitive non-automotive designs where qualification and noise performance are secondary |
| MMSZ4678T1G | 2.0 V Zener, SOD-123 package, ±5 % tolerance, but higher 500 mW Ptot and 300 Ω rdiff at 5 mA | Used in higher-power industrial regulators; larger footprint increases PCB area by 45 % | Prefer when thermal margin is constrained and board space allows larger SOD-123; avoid if AEC-Q101 compliance is mandatory |
Compared with BZX38450-C2V0-Q, BZX384-C2V0 omits automotive qualification and noise optimization, while MMSZ4678T1G trades AEC-Q101 compliance for higher power handling and larger footprint - making the BZX38450-C2V0-Q uniquely balanced for space-, power-, and reliability-constrained automotive subsystems.
Availability
BZX38450-C2V0-Q is available at Aetrix Electronics and suitable for automotive electronic control units, portable medical instrumentation, USB interface protection circuits, and industrial PLC input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-C2V0-Q 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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and mobile markets.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, low-noise voltage regulation in harsh-environment automotive electronics where size, power, and reliability are co-constrained.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The BZX38450-C2V0-Q has a nominal Zener voltage of 2.0 V, with guaranteed breakdown occurring between 1.88 V and 2.12 V at IZ = 50 µA. Its absolute maximum non-repetitive peak reverse voltage is limited by PZSM = 40 W for 100 µs pulses - translating to ~280 V transient clamping capability under surge conditions, provided thermal limits are observed.
Can this Zener diode be used in series or parallel configurations?
Series connection is permissible to achieve higher regulated voltages, but requires matched units to avoid current imbalance; parallel use is strongly discouraged due to manufacturing spread in Zener knee characteristics, which causes uneven current sharing and potential thermal runaway. For higher power, use a single higher-rated device or active regulation instead.
How does the ±5 % tolerance affect accuracy in a precision reference application?
At 2.0 V nominal, ±5 % tolerance means the actual Zener voltage falls between 1.90 V and 2.10 V at 50 µA. In precision applications, this introduces up to ±50 mV offset error; system-level calibration or post-regulation buffering (e.g., with an op-amp follower) is recommended to achieve sub-10 mV accuracy across temperature and aging.
Is the SOD323 package compatible with standard reflow soldering profiles?
Yes - the SOD323 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The recommended footprint (Fig. 10) uses 0.5 mm × 0.6 mm solder pads with 0.6 mm solder resist opening; thermal relief design must respect Rth(j-a) = 415 K/W to avoid exceeding 150 °C junction temperature during continuous operation.
BZX38450-C2V0-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:
- Active
- Voltage - Zener (Nom) (Vz):
- 2 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 7 µA @ 1 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-C2V0-QX FAQ
1.How can I place an order for BZX38450-C2V0-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C2V0-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-C2V0-QX reliable?
The price and inventory of BZX38450-C2V0-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-C2V0-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-C2V0-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C2V0-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C2V0-QX?
BZX38450-C2V0-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C2V0-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-C2V0-QX?
For technical support, including BZX38450-C2V0-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C2V0-QX requirements.
6.How does Aetrix verify that BZX38450-C2V0-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-C2V0-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-C2V0-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-C2V0-QX?
All BZX38450-C2V0-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C2V0-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-C2V0-QX part is unused and in its original packaging.
Return procedure for BZX38450-C2V0-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C2V0-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
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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