My Inquiry
My Account
Nexperia USA Inc. BZX384-C68-QX
- Part No.:
- BZX384-C68-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-C68-QX.pdf
- Description:
- DIODE ZENER 68V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,398
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BZX384-C68-Q from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 68 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-C68-Q datasheet, BZX384-C68-Q pinout, BZX384-C68-Q application, or BZX384-C68-Q equivalent, this device serves as a precision low-power shunt regulator in battery management, ECU power rail stabilization, and sensor signal conditioning where stable 68 V clamping with automotive-grade reliability is required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its differential resistance of 475 Ω at 2 mA ensures predictable regulation slope, while the temperature coefficient of +0.05 mV/K minimizes drift over -65 °C to +150 °C ambient range.
Designed for surface-mount use on FR4 PCBs with standard SOD323 footprint, it supports non-repetitive peak reverse power dissipation up to 40 W (100 μs pulse), enabling transient surge suppression in 12 V/24 V automotive systems without external series limiting components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VZ | 64.0 V to 72.0 V at IZ = 2 mA - defines clamping threshold for overvoltage protection |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C - sets maximum continuous DC power handling on standard FR4 PCB |
| Differential Resistance rdif | 475 Ω max at IZ = 2 mA - determines regulation linearity and output impedance |
| Reverse Current IR | 240 μA max at VR = 52 V - specifies leakage level below breakdown, critical for low-power standby circuits |
| Non-repetitive Peak Power | 40 W at tp = 100 μs - enables single-event transient suppression per ISO 7637-2 Pulse 1/2a |
| Junction Temperature Range | -65 °C to +150 °C - supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - validated for automotive discrete semiconductor stress testing including HTGB, HTRB, and temperature cycling |
Pinout & Package
SOD323 (SC-76) plastic surface-mounted 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; reverse-bias anode-to-cathode voltage establishes Zener conduction |
| 2 | Anode (A) | Typically tied to ground or lower-potential rail; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 compliant - meets stress test requirements for under-hood deployment without derating |
| Low-profile packaging | SOD323 footprint (2.3 × 1.35 mm) - enables high-density layout in space-constrained ECUs and ADAS modules |
| Tolerance grade | ±5 % (C-series) - balances cost and precision for non-critical voltage references like supply rail monitoring |
| Thermal resistance | Rth(j-sp) = 110 K/W - allows efficient heat transfer from junction to solder point on standard PCB |
| Surge robustness | IZSM = 0.25 A at 100 μs - withstands common automotive load dump transients when used with appropriate series resistor |
Applications
| Engine Control Unit (ECU) Power Rail Clamping | Automotive Battery Monitoring Circuit |
|---|---|
Use Scenario: Protects 5 V microcontroller supply rail from 68 V transients induced by alternator load dump or inductive switching. IC Role / Device Role / Timing Role: Shunt regulator providing passive overvoltage clamp; no timing function. Use Value: Limits rail voltage to safe level without active control, reducing need for complex TVS+LDO architectures. |
Use Scenario: Provides stable 68 V reference for analog-to-digital conversion of 12 V/24 V battery voltage in vehicle health monitoring. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC input scaling; no timing role. Use Value: Enables accurate battery state-of-charge estimation using low-cost 10-bit ADC with <±1 % full-scale error. |
| Infotainment System Surge Protection | Body Control Module (BCM) Sensor Interface |
Use Scenario: Suppresses ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (+100 V) on LIN bus power lines feeding head unit modules. IC Role / Device Role / Timing Role: Passive clamping element placed upstream of LDO regulators; no timing function. Use Value: Absorbs energy from fast transients before they reach sensitive PMICs, extending system lifetime. |
Use Scenario: Stabilizes bias voltage for Hall-effect position sensors in door latch and seat motor assemblies. IC Role / Device Role / Timing Role: Low-noise voltage reference for sensor excitation; no timing role. Use Value: Maintains sensor output linearity across temperature (-40 °C to +125 °C) due to low tempco (0.05 mV/K). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B68-Q | ±2 % tolerance (66.6 V–69.4 V), lower rdif (80 Ω), higher IR (15 μA at 52 V) | Better regulation accuracy but higher leakage; suited for precision reference vs. clamping | Select when tighter voltage tolerance is required and leakage current budget permits |
| MMSZ5263ET1G | ±5 % tolerance (64.6 V–71.4 V), same SOD-123 package, 500 mW rating, non-AEC-Q101 | Higher power rating but lacks automotive qualification; requires additional validation for vehicle use | Choose for industrial or consumer designs where AEC-Q101 is not mandated and higher Ptot is needed |
Compared with BZX384-B68-Q, the C-grade offers relaxed tolerance for cost-sensitive clamping; versus MMSZ5263ET1G, it provides guaranteed automotive qualification and optimized thermal performance in SOD323, making it preferable for production vehicle programs.
Availability
BZX384-C68-Q is available at Aetrix Electronics and suitable for automotive electronics, battery management systems, and sensor interface circuits requiring stable component supply with AEC-Q101 compliance and long-term lifecycle support.
Supply support for BZX384-C68-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 manufacturer specializing in high-volume logic, analog, and discrete devices, with leadership in automotive-qualified components and advanced packaging technologies.
The BZX384-Q series belongs to Nexperia's automotive Zener diode product line, engineered specifically for reliable voltage regulation and transient suppression in harsh-temperature vehicle subsystems.
FAQ
What is the maximum continuous reverse current the BZX384-C68-Q can sustain?
The device has no specified continuous reverse current rating beyond its 300 mW power limit. At 68 V, sustained current must remain below 4.4 mA (Ptot/VZ) to avoid exceeding thermal limits on standard FR4 PCB. Higher currents require derating per Rth(j-a) = 415 K/W.
Can BZX384-C68-Q be used in parallel for higher power handling?
No - Zener diodes exhibit negative temperature coefficient and mismatched VZ tolerances, causing current hogging and thermal runaway when paralleled. For higher power, use a single higher-rated device or add external current-sharing resistors with careful thermal design.
How does the ±5 % tolerance affect circuit design margin?
The 64.0 V–72.0 V VZ range requires downstream protection circuits (e.g., MCU reset thresholds or LDO enable pins) to accommodate worst-case clamping. Designers must verify that 64 V remains above minimum operating voltage and 72 V stays below absolute maximum ratings of protected ICs.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The recommended peak temperature is 260 °C for ≤ 30 seconds, with preheat ramp rate ≤ 3 °C/s and cooling rate ≥ 1 °C/s. Footprint dimensions match Figure 12 in the datasheet.
BZX384-C68-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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 300 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 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-C68-QX FAQ
1.How can I place an order for BZX384-C68-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-C68-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-C68-QX reliable?
The price and inventory of BZX384-C68-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-C68-QX is usually 5 days.
3.What payment methods are accepted for BZX384-C68-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-C68-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-C68-QX?
BZX384-C68-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-C68-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-C68-QX?
For technical support, including BZX384-C68-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-C68-QX requirements.
6.How does Aetrix verify that BZX384-C68-QX is sourced from the original manufacturer or authorized distributors?
All BZX384-C68-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-C68-QX meets industry standards.
7.What is the process for return or replacement of BZX384-C68-QX?
All BZX384-C68-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-C68-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-C68-QX part is unused and in its original packaging.
Return procedure for BZX384-C68-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX384-C68-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…
