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Nexperia USA Inc. BZX38450-C4V7-QF
- Part No.:
- BZX38450-C4V7-QF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX38450-C4V7-QF.pdf
- Description:
- DIODE ZENER 4.7V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:29,433
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Product details
Overview
BZX38450-C4V7-QF from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, rated for 4.7 V nominal regulation at 50 µA test current, with ±5 % tolerance, 300 mW power dissipation, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BZX38450-C4V7-QF datasheet, BZX38450-C4V7-QF pinout, BZX38450-C4V7-QF application, or BZX38450-C4V7-QF equivalent, this device serves as a precision low-bias voltage reference in battery-powered sensor nodes, automotive body control modules, and portable instrumentation where leakage-sensitive regulation is required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified working voltage of 4.47 V to 4.94 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.7 mV/K and differential resistance of ≤80 Ω at IZ = 5 mA. Its low 50 µA test current enables stable regulation under ultra-low quiescent current conditions.
The device features intentional minor leakage current optimization per AN90031 for improved switching speed and reduced noise, and is qualified to AEC-Q101 for operation across −55 °C to +150 °C ambient temperature range with junction temperature up to 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V (min 4.47 V, max 4.94 V at IZ = 50 µA); defines precise regulation point for low-power bias networks |
| Tolerance | ±5 % (C-series); ensures predictable voltage margin for automotive-grade signal conditioning circuits |
| Power Dissipation | 300 mW at Tamb ≤ 25 °C on FR4 PCB; supports continuous operation in compact SMD layouts without forced cooling |
| Test Current | 50 µA; enables stable regulation in micro-power systems such as coin-cell IoT sensors and sleep-mode ECUs |
| Differential Resistance | ≤80 Ω at IZ = 5 mA; maintains tight output regulation under small load transients in reference supply rails |
| Reverse Leakage | ≤5.0 µA at VR = 3.0 V; minimizes standby current in always-on automotive subsystems |
| Forward Voltage | ≤0.9 V at IF = 10 mA; allows safe forward conduction during transient clamping or polarity protection |
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 for correct PCB orientation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes reverse-bias path for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low test current operation | Specified at 50 µA - enables reliable regulation in sub-100 µA power domains like automotive door module sleep states |
| AEC-Q101 qualification | Qualified for automotive applications - supports deployment in engine control units, lighting controllers, and ADAS sensor interfaces |
| Optimized leakage profile | Intentional minor rise in leakage per AN90031 - reduces switching noise in PWM-driven reference buffers and improves transient response |
| Thermal robustness | Rth(j-a) = 415 K/W (free air); allows operation up to 150 °C junction temperature in sealed automotive enclosures |
| Small-footprint packaging | SOD323 outline with 1.3 mm pitch - fits high-density PCBs in space-constrained modules such as smart actuators and LIN bus nodes |
Applications
| Automotive Body Control Module | Portable Medical Sensor Node |
|---|---|
|
Use Scenario: Regulating reference voltage for analog front-end of door lock actuator MCU during battery-saver mode. IC Role / Device Role / Timing Role: Zener voltage reference providing stable 4.7 V bias to op-amp comparators and ADC reference inputs. Use Value: ±5 % tolerance and 50 µA test current ensure accurate threshold detection while drawing <1 µA total standby current. |
Use Scenario: Supplying precision bias to low-power ECG amplifier in disposable wearable patch. IC Role / Device Role / Timing Role: Low-leakage Zener shunt regulator establishing clean 4.7 V reference for signal chain. Use Value: ≤5.0 µA leakage at 3.0 V reverse bias preserves coin-cell battery life over multi-week monitoring cycles. |
| Industrial Temperature Transmitter | Smart Lighting Driver IC Reference |
|
Use Scenario: Stabilizing excitation voltage for RTD bridge in DIN-rail mounted process transmitter. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant current source accuracy across −40 °C to +85 °C. Use Value: −2.7 mV/K temperature coefficient and 80 Ω dynamic impedance minimize drift-induced measurement error. |
Use Scenario: Providing stable feedback reference for isolated flyback LED driver in automotive interior lighting. IC Role / Device Role / Timing Role: Secondary-side Zener clamp setting output voltage via optocoupler feedback loop. Use Value: AEC-Q101 qualification and 300 mW dissipation support continuous operation under thermal stress in enclosed lamp housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B4V7-Q | ±2 % tolerance, lower leakage (<1 µA at 3 V), higher rdiff (≥100 Ω at 5 mA) | Better accuracy but less stable under load variation; suited for calibration references, not dynamic bias rails | Select when absolute voltage precision outweighs load regulation performance |
| MMSZ4704T1G | Same 4.7 V nominal, ±5 %, but rated only to 200 mW and not AEC-Q101 qualified | Limited to industrial/commercial use; unsuitable for automotive under-hood or safety-critical zones | Choose only for cost-sensitive non-automotive designs with relaxed thermal and reliability requirements |
Compared with BZX38450-C4V7-QF, the BZX384-B4V7-Q offers tighter voltage tolerance at the expense of higher dynamic impedance, while the MMSZ4704T1G lacks automotive qualification and thermal headroom-making the C-series part optimal for AEC-compliant, low-leakage, medium-power regulation.
Availability
BZX38450-C4V7-QF is available at Aetrix Electronics and suitable for automotive electronics, portable medical devices, and industrial sensor transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for BZX38450-C4V7-QF 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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX38450-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, designed specifically for low-current, low-noise voltage reference and regulation in automotive and portable electronics.
FAQ
What is the maximum reverse voltage this Zener can regulate without damage?
The BZX38450-C4V7-QF has an absolute maximum reverse voltage defined by its Zener breakdown specification: it regulates stably between 4.47 V and 4.94 V at 50 µA. Exceeding 4.94 V continuously risks thermal runaway; the non-repetitive peak reverse power limit is 40 W for 100 µs pulses, but sustained operation must stay within 300 mW total dissipation at ambient ≤25 °C.
Does the "QF" suffix indicate a specific tape-and-reel configuration?
Yes - the "QF" suffix denotes the standard SOD323 packaging format supplied in 10,000-piece 8 mm tape-and-reel per IEC 60286-3, with embossed carrier tape, cover tape sealing, and moisture sensitivity level (MSL) 1 rating - compatible with standard SMT pick-and-place equipment and reflow profiles.
How does the "C" in BZX38450-C4V7-QF differ from "B" series variants?
The "C" denotes ±5 % tolerance and optimized leakage behavior per AN90031, whereas "B" indicates ±2 % tolerance and lower leakage. The C-series trades absolute accuracy for faster switching response and reduced noise in dynamic bias applications - confirmed in Table 8 electrical characteristics and feature description section 2.
Can this Zener be used in forward conduction mode as a general-purpose diode?
Yes - its forward voltage is specified ≤0.9 V at 10 mA, and absolute maximum forward current is 250 mA. However, it is not optimized for rectification: its VF is higher than Schottky diodes, and its surge capability is limited to 40 W for 100 µs pulses. Use only for low-duty-cycle clamping or polarity protection, not continuous forward conduction.
BZX38450-C4V7-QF 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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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-C4V7-QF FAQ
1.How can I place an order for BZX38450-C4V7-QF through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX38450-C4V7-QF 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-C4V7-QF reliable?
The price and inventory of BZX38450-C4V7-QF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX38450-C4V7-QF is usually 5 days.
3.What payment methods are accepted for BZX38450-C4V7-QF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX38450-C4V7-QF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX38450-C4V7-QF?
BZX38450-C4V7-QF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX38450-C4V7-QF 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-C4V7-QF?
For technical support, including BZX38450-C4V7-QF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX38450-C4V7-QF requirements.
6.How does Aetrix verify that BZX38450-C4V7-QF is sourced from the original manufacturer or authorized distributors?
All BZX38450-C4V7-QF 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-C4V7-QF meets industry standards.
7.What is the process for return or replacement of BZX38450-C4V7-QF?
All BZX38450-C4V7-QF units undergo pre-shipment inspection (PSI). If there is an issue with BZX38450-C4V7-QF, 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-C4V7-QF part is unused and in its original packaging.
Return procedure for BZX38450-C4V7-QF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX38450-C4V7-QF Tags
-
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
-
MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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