My Inquiry
My Account
Nexperia USA Inc. BZX384-A47-QX
- Part No.:
- BZX384-A47-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-A47-QX.pdf
- Description:
- DIODE ZENER 47V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,827
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-A47-Q from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 47 V nominal breakdown voltage at 2 mA, 300 mW total power dissipation, and qualified to AEC-Q101 for automotive voltage reference and overvoltage protection circuits.
For engineers reviewing the BZX384-A47-Q datasheet, BZX384-A47-Q pinout, BZX384-A47-Q application, or BZX384-A47-Q equivalent, this part delivers precise 47 V regulation with low differential resistance (375 Ω), tight ±1 % tolerance, and robust non-repetitive surge capability (40 W, 100 μs), critical for ECU power rail clamping and sensor biasing in harsh environments.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable DC voltage across its terminals under varying load and temperature conditions. Its 47 V nominal Zener voltage is specified at IZ = 2 mA with a temperature coefficient of +0.05 mV/K, indicating minimal drift over temperature.
The device exhibits 375 Ω maximum differential resistance at IZ = 2 mA and supports up to 250 mA forward current, while reverse leakage remains ≤170 μA at VR = 37.6 V, ensuring low quiescent error in precision regulation paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 46.53 V to 47.47 V at IZ = 2 mA - defines regulated output voltage window for design margining |
| Tolerance | ±1 % - enables high-accuracy voltage references without post-calibration |
| Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C on FR4 PCB - sets maximum continuous thermal load in standard layout |
| Differential Resistance (rdif) | ≤375 Ω at IZ = 2 mA - determines regulation stiffness and load-induced voltage deviation |
| Non-repetitive Peak Power | 40 W for 100 μs pulse - provides transient overvoltage suppression capability per ISO 7637-2 |
| Reverse Leakage (IR) | ≤170 μA at VR = 37.6 V - ensures low standby current in always-on monitoring circuits |
| Junction Temperature (Tj) | −65 °C to +150 °C - supports operation in under-hood automotive environments |
Pinout & Package
SOD323 (SC-76) surface-mount plastic package with 2 leads; cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; polarity-sensitive terminal for reverse-bias operation |
| 2 | Anode (A) | Connected to ground or lower-potential rail; completes Zener conduction path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| ±1 % Zener tolerance | Reduces system-level calibration burden in safety-critical voltage monitoring functions |
| Low thermal resistance (Rth(j-sp)) | 110 K/W to solder point - improves thermal coupling to PCB copper for sustained power handling |
| Non-repetitive surge rating | 40 W peak reverse power - meets ISO 7637-2 Pulse 1/2a/5a transient immunity requirements |
| Small footprint (SOD323) | 2.3 mm × 1.35 mm body - enables dense placement in space-constrained ECU modules |
Applications
| Automotive Engine Control Unit (ECU) Power Rail Clamping | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Suppresses load-dump transients on 12 V supply rails in engine control modules. IC Role / Device Role / Timing Role: Zener clamp placed between VBAT and ground to shunt excess energy during ISO 7637-2 Pulse 5a events. Use Value: Limits rail voltage to ≤52 V during 40 W surges, protecting downstream MCUs and analog front-ends. |
Use Scenario: Provides stable 47 V bias for high-side current sense amplifier reference. IC Role / Device Role / Timing Role: Precision Zener reference source for op-amp feedback network in isolated current measurement. Use Value: Enables ±0.5 % full-scale accuracy over −40 °C to +125 °C due to tight ±1 % tolerance and low tempco. |
| Automotive Body Control Module (BCM) Overvoltage Protection | Medical Diagnostic Equipment Voltage Reference |
Use Scenario: Guards LIN bus transceiver supply against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Reverse-connected Zener on VCC line to clamp fault voltages above 47 V. Use Value: Prevents latch-up in transceivers by limiting voltage excursion to <50 V for >100 ms durations. |
Use Scenario: Supplies excitation voltage for piezoresistive pressure sensors in portable ultrasound units. IC Role / Device Role / Timing Role: Low-noise, thermally stable voltage reference for ratiometric ADC conversion. Use Value: Delivers <10 ppm/°C effective drift via matched thermal design, meeting IEC 60601-1 stability requirements. |
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-B47-Q | ±2 % tolerance (46.1 V–47.9 V), higher max IR (200 μA at 37.6 V) | Acceptable where tighter regulation not required; lower cost for non-safety systems | Select when AEC-Q101 compliance is needed but ±1 % tolerance is unnecessary |
| MMSZ47ET1G | ±5 % tolerance (44.7 V–49.4 V), same SOD-123 package, Ptot = 500 mW | Higher power handling but looser tolerance; less suitable for precision biasing | Choose for cost-sensitive industrial designs requiring >300 mW continuous dissipation |
Compared with BZX384-B47-Q and MMSZ47ET1G, the BZX384-A47-Q uniquely balances automotive qualification, ±1 % accuracy, and SOD323 compactness-making it optimal for space-constrained, safety-relevant voltage references where regulation error must stay below ±0.5 V across temperature.
Availability
BZX384-A47-Q is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, medical diagnostic equipment, and body control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for BZX384-A47-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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The BZX384-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for precision voltage regulation and transient suppression in automotive power systems and industrial control electronics.
FAQ
What is the maximum continuous power dissipation for BZX384-A47-Q at 85 °C ambient?
At Tamb = 85 °C, derated power dissipation is 210 mW, calculated using Rth(j-a) = 415 K/W and Tj(max) = 150 °C. This assumes mounting on FR4 PCB with single-sided copper and standard footprint per datasheet condition [2]. Operation beyond this limit risks thermal runaway and parametric shift.
Does BZX384-A47-Q support bidirectional transient suppression?
No - BZX384-A47-Q is a unidirectional Zener diode optimized for reverse-bias regulation only. Forward conduction is limited to 250 mA and lacks symmetric clamping characteristics. For bidirectional TVS protection, use dedicated devices such as PESD5V0S1BA.
How does the 47 V Zener voltage perform across temperature in automotive applications?
At IZ = 2 mA, the temperature coefficient is +0.05 mV/K, resulting in <±0.7 V drift from −40 °C to +125 °C. This stability, combined with AEC-Q101 qualification, ensures reliable regulation in under-hood environments without external compensation.
Can BZX384-A47-Q be used in parallel for higher current handling?
Not recommended - Zener voltage mismatch between units causes current hogging and thermal imbalance. Parallel operation requires matched units with binning data and external ballast resistors. For higher current, select higher-power packages like SOD-123 or SMA.
BZX384-A47-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384-Q
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±1%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 170 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 32.9 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-A47-QX FAQ
1.How can I place an order for BZX384-A47-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-A47-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 BZX384-A47-QX reliable?
The price and inventory of BZX384-A47-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-A47-QX is usually 5 days.
3.What payment methods are accepted for BZX384-A47-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-A47-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-A47-QX?
BZX384-A47-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-A47-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 BZX384-A47-QX?
For technical support, including BZX384-A47-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-A47-QX requirements.
6.How does Aetrix verify that BZX384-A47-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-A47-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 BZX384-A47-QX meets industry standards.
7.What is the process for return or replacement of BZX384-A47-QX?
All BZX384-A47-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-A47-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 BZX384-A47-QX part is unused and in its original packaging.
Return procedure for BZX384-A47-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-A47-QX 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
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
