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Nexperia USA Inc. BZX38450-B3V6-QX
- Part No.:
- BZX38450-B3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-B3V6-QX.pdf
- Description:
- DIODE ZENER 3.6V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:8,601
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Product details
Overview
BZX38450-B3V6-QX from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.6 V nominal regulation at 50 µA test current, with ±2 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-B3V6-QX datasheet, BZX38450-B3V6-QX pinout, BZX38450-B3V6-QX application, or BZX38450-B3V6-QX 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 automotive-grade reliability under −55 °C to +150 °C ambient conditions.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 3.53 V to 3.67 V at IZ = 50 µA, exhibiting a temperature coefficient of −3.5 mV/K and differential resistance ≤95 Ω at IZ = 5 mA. Its low leakage current (≤2.0 µA at VR = 3.0 V) supports precision biasing in battery-sensitive circuits.
Designed for stable low-current regulation, it features a junction-to-solder-point thermal resistance of 110 K/W and withstands non-repetitive peak reverse power up to 40 W for 100 µs pulses, enabling transient suppression in compact automotive sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 3.6 V (min 3.53 V / max 3.67 V at 50 µA); enables precise low-voltage reference in 3.3 V rail monitoring |
| Tolerance | ±2 % (B-series); ensures tight regulation for analog sensor biasing without trimming |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C; supports continuous operation on standard FR4 PCB with single-sided copper |
| Test Current | 50 µA; optimized for ultra-low-power applications such as coin-cell-powered IoT sensors |
| Forward Voltage | ≤0.9 V at IF = 10 mA; allows use as clamp or protection diode in bidirectional signal paths |
| Junction Temperature | −55 °C to +150 °C; qualified for under-hood automotive environments per AEC-Q101 |
| Thermal Resistance | 415 K/W (junction-to-ambient); defines derating curve for ambient temperatures above 25 °C |
Pinout & Package
Package: SOD323 (SC-76), surface-mounted plastic package; 1.7 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch; cathode indicated by marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar on package identifies this terminal |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - reduces quiescent current in always-on battery backup circuits |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Controlled leakage profile | Optimized fast switching and noise reduction per AN90031 - improves stability in high-frequency feedback loops |
| Small footprint | SOD323 package enables placement in space-constrained PCB layouts such as camera modules and ECUs |
| Two tolerance options | ±2 % (B-series) and ~±5 % (C-series) - supports cost/performance trade-offs across product tiers |
Applications
| Automotive Cabin Sensors | Portable Medical Monitors |
|---|---|
|
Use Scenario: Voltage reference for MEMS pressure and humidity sensors in HVAC control units. IC Role / Device Role / Timing Role: Zener regulator providing stable 3.6 V bias to analog front-end amplifiers. Use Value: ±2 % tolerance and −3.5 mV/K tempco ensure <±10 mV drift over −40 °C to +85 °C operating range. |
Use Scenario: Precision biasing of ECG amplifier input stages in handheld patient monitors. IC Role / Device Role / Timing Role: Low-current voltage reference replacing larger TO-92 regulators. Use Value: 50 µA test current enables >5-year battery life in devices powered by CR2032 cells. |
| Industrial IoT Edge Nodes | Automotive Body Control Modules |
|
Use Scenario: Reference voltage generation for ADCs in wireless temperature transmitters. IC Role / Device Role / Timing Role: Zener diode supplying regulated voltage to SAR ADC reference inputs. Use Value: 95 Ω dynamic impedance at 5 mA ensures <0.5 LSB error contribution in 12-bit conversions. |
Use Scenario: Overvoltage clamping and supply stabilization for LIN bus transceivers. IC Role / Device Role / Timing Role: Reverse-biased Zener protecting transceiver VCC pins against load-dump transients. Use Value: 40 W non-repetitive surge rating handles ISO 7637-2 Pulse 1/2a events without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-C3V6 | ±5 % tolerance (C-series), higher leakage (≤7.5 µA at VR = 3.0 V), same SOD323 package | Acceptable where cost sensitivity outweighs precision; unsuitable for <1 % reference accuracy requirements | Select when budget constraints dominate and temperature-induced drift is mitigated elsewhere in circuit |
| MMSZ5226B-7-F | 3.3 V nominal, ±5 %, 500 mW Ptot, SOD-123 package; higher power but larger footprint | Used in higher-current regulation (up to 20 mA); not AEC-Q101 qualified | Choose only for non-automotive industrial designs requiring >300 mW headroom and no automotive compliance |
Compared with BZX38450-B3V6-QX, the BZX384-C3V6 sacrifices regulation accuracy for cost, while MMSZ5226B-7-F trades automotive qualification and size for higher power handling - making the BZX38450-B3V6-QX optimal for space-constrained, AEC-compliant 3.6 V reference needs.
Availability
BZX38450-B3V6-QX is available at Aetrix Electronics and suitable for automotive cabin sensors, portable medical monitors, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZX38450-B3V6-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 leading semiconductor manufacturer specializing in high-performance, reliable discrete and logic devices, with global R&D and manufacturing facilities focused on automotive, industrial, and mobile markets.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for low-current, high-stability voltage regulation in harsh-environment automotive electronics.
FAQ
What is the maximum continuous reverse current the BZX38450-B3V6-QX can sustain at 3.0 V?
At VR = 3.0 V and Tj = 25 °C, the maximum reverse current is 2.0 µA. This value is confirmed in Table 8 of the datasheet for the B-series 3.6 V variant and reflects its low-leakage design optimized for battery-powered systems.
Does the BZX38450-B3V6-QX require external series resistance in typical regulation circuits?
Yes - a current-limiting resistor is mandatory to set the Zener operating current between 50 µA and 250 mA. For example, with a 5 V supply and target IZ = 1 mA, a 1.4 kΩ resistor ensures stable 3.6 V regulation while staying within 300 mW dissipation limits.
How does the −3.5 mV/K temperature coefficient affect output voltage over temperature?
Over a −40 °C to +125 °C range, the Zener voltage shifts by approximately −575 mV (165 K × −3.5 mV/K), resulting in a total variation of ±288 mV around 3.6 V. This is factored into system-level tolerance budgets for automotive sensor references.
Can the BZX38450-B3V6-QX be used in forward conduction mode?
Yes - it functions as a standard silicon diode with VF ≤ 0.9 V at 10 mA, enabling dual-use as both a Zener regulator and ESD clamp. However, forward conduction is not its primary function, and sustained forward current above 250 mA risks permanent damage per absolute maximum ratings.
BZX38450-B3V6-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):
- 3.6 V
- Tolerance:
- ±2%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 7.5 µA @ 2 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:
- SOD-323
BZX38450-B3V6-QX FAQ
1.How can I place an order for BZX38450-B3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-B3V6-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-B3V6-QX reliable?
The price and inventory of BZX38450-B3V6-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-B3V6-QX is usually 5 days.
3.What payment methods are accepted for BZX38450-B3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-B3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-B3V6-QX?
BZX38450-B3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-B3V6-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-B3V6-QX?
For technical support, including BZX38450-B3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-B3V6-QX requirements.
6.How does Aetrix verify that BZX38450-B3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZX38450-B3V6-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-B3V6-QX meets industry standards.
7.What is the process for return or replacement of BZX38450-B3V6-QX?
All BZX38450-B3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-B3V6-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-B3V6-QX part is unused and in its original packaging.
Return procedure for BZX38450-B3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-B3V6-QX Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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