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Nexperia USA Inc. BZX384-B68,115
- Part No.:
- BZX384-B68,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
BZX384-B68,115.pdf
- Description:
- DIODE ZENER 68V 300MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
BZX384-B68,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 68 V nominal breakdown voltage at 5 mA, 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog and digital supply rails.
For engineers reviewing the BZX384-B68,115 datasheet, BZX384-B68,115 pinout, BZX384-B68,115 application, or BZX384-B68,115 equivalent, key selection criteria include Zener voltage tolerance (±2 %), thermal resistance (110 K/W to solder point), differential resistance (80 Ω max), temperature coefficient (+47.6 mV/K), and SOD323 footprint compatibility with high-density PCB layouts.
Technical Context
This Zener diode operates in reverse-bias breakdown mode with a specified 68 V working voltage at IZ = 5 mA, exhibiting a positive temperature coefficient of +47.6 mV/K - indicating voltage increases with junction temperature. Its differential resistance is ≤80 Ω, ensuring stable regulation under small-signal load variations.
Designed for surface-mount use on FR4 PCBs with single-sided copper, it delivers 300 mW continuous dissipation at Tamb ≤ 25 °C and withstands 40 W non-repetitive surges (tp = 100 μs). The cathode-marked SOD323 package supports automated placement and reflow soldering per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 66.6 V to 69.4 V at IZ = 5 mA - defines precise clamping threshold for protection or reference circuits |
| Tolerance | ±2 % - enables tighter voltage margin control than ±5 % variants in critical biasing applications |
| Differential Resistance (rdif) | ≤80 Ω - ensures minimal output voltage shift under ±1 mA load current variation |
| Temperature Coefficient (SZ) | +47.6 mV/K - quantifies voltage drift per degree rise; requires thermal compensation in precision references |
| Total Power Dissipation (Ptot) | 300 mW at Tamb ≤ 25 °C - sets maximum steady-state power handling on standard FR4 PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp ≤ 100 μs - supports transient overvoltage suppression without failure |
| Reverse Current (IR) | ≤0.2 μA at VR = 54.4 V - confirms low leakage below knee voltage, critical for standby power integrity |
Pinout & Package
Package: SOD323 (SC-76), 2-pin surface-mount plastic package with cathode marked by bar. Dimensions: 1.8 mm × 1.35 mm × 0.95 mm (L × W × H); recommended reflow footprint per Figure 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to regulated output node; marking bar identifies this terminal for correct orientation during placement |
| 2 | Anode (A) | Connected to ground or lower-potential rail; reverse-bias polarity must be maintained for Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMD package | SOD323 footprint (1.8 × 1.35 mm) enables high-density routing in space-constrained consumer and industrial PCBs |
| Stable ±2 % voltage tolerance | Reduces need for post-production trimming in voltage reference designs, lowering test time and cost |
| Controlled temperature coefficient | +47.6 mV/K allows predictable drift modeling for compensated reference circuits across -65 °C to +150 °C |
| High surge robustness | 40 W non-repetitive peak power rating protects downstream circuitry from ESD or inductive kickback transients |
| Low thermal resistance to solder point | 110 K/W (junction-to-solder-point) improves heat transfer into PCB copper, supporting sustained 300 mW operation |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Circuit |
|---|---|
|
Use Scenario: Providing stable 68 V reference for feedback loop in isolated DC-DC converter secondary side. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, sinking excess current to maintain regulated output voltage. Use Value: ±2 % tolerance and 80 Ω differential resistance ensure <±0.7 V output deviation across line/load/temperature, meeting industrial converter accuracy requirements. |
Use Scenario: Protecting microcontroller I/O pins from 72 V transients induced by relay coil de-energization. IC Role / Device Role / Timing Role: Clamps voltage at 69.4 V (max VZ) to prevent gate oxide damage to 5 V logic inputs. Use Value: 40 W surge capability absorbs 100 μs spikes without degradation, while 0.2 μA leakage avoids loading sensitive input nodes. |
| ADC Reference Stabilization | Current Source Biasing |
|
Use Scenario: Stabilizing reference voltage for 12-bit SAR ADC in battery-powered sensor node. IC Role / Device Role / Timing Role: Supplies fixed 68 V reference to voltage divider network generating scaled analog input range. Use Value: +47.6 mV/K temperature coefficient is compensated via software lookup table, enabling <±1 LSB error across -20 °C to +70 °C operating range. |
Use Scenario: Setting bias current for high-voltage op-amp stage in programmable power supply. IC Role / Device Role / Timing Role: Forms constant-current sink with series resistor, leveraging stable VZ to define IB = (VCC − 68 V)/R. Use Value: 80 Ω rdif limits current variation to <±0.1 mA under ±1 V supply ripple, ensuring amplifier quiescent point stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5263B | 68 V nominal, ±5 % tolerance, 350 mW Ptot, SOT-23 package | Higher power but looser tolerance; larger footprint requires layout revision | Select when higher continuous power margin is needed and ±5 % regulation is acceptable |
| Vishay BZX384-C68 | 68 V nominal, ±5 % tolerance, identical SOD323 package and 300 mW rating | Lower cost but wider voltage spread (64–72 V) impacts precision reference accuracy | Choose for non-critical clamping where cost sensitivity outweighs voltage stability needs |
Compared with BZX384-B68,115, MMBZ5263B offers +50 mW power headroom but sacrifices tolerance and package compatibility, while BZX384-C68 retains footprint and power specs but trades ±2 % accuracy for cost - making the BZX384-B68,115 optimal for designs requiring tight voltage control in constrained layouts.
Availability
BZX384-B68,115 is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, and precision biasing applications requiring stable component supply and full traceability.
Supply support for BZX384-B68,115 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.
The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and clamping in consumer, industrial, and computing applications where SOD323 footprint and ±1–5 % tolerance options are essential.
FAQ
What is the maximum reverse voltage before breakdown for BZX384-B68,115?
The guaranteed minimum breakdown voltage is 66.6 V at IZ = 5 mA, with absolute maximum reverse voltage limited to 72 V per the 68 V ±2 % tolerance band. Operation above 72 V risks irreversible avalanche degradation.
Can BZX384-B68,115 be used in parallel for higher power dissipation?
No - Zener diodes exhibit negative temperature coefficients in some ranges and manufacturing variance causes current hogging. Parallel connection leads to thermal runaway and premature failure; use a single higher-rated device or active regulation instead.
Is the SOD323 package compatible with standard reflow profiles?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended solder land pattern (Figure 12) uses 0.5 mm pad width and 0.6 mm spacing, supporting peak temperatures up to 260 °C for 10 seconds.
How does the +47.6 mV/K temperature coefficient affect long-term stability?
This coefficient means VZ increases by ~3.2 V over a 67 K rise (e.g., from 25 °C to 92 °C junction temperature). For applications requiring <±0.1 % stability, thermal management or software compensation is required.
BZX384-B68,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX384
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±2%
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
BZX384-B68,115 FAQ
1.How can I place an order for BZX384-B68,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX384-B68,115 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-B68,115 reliable?
The price and inventory of BZX384-B68,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX384-B68,115 is usually 5 days.
3.What payment methods are accepted for BZX384-B68,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX384-B68,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX384-B68,115?
BZX384-B68,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX384-B68,115 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-B68,115?
For technical support, including BZX384-B68,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX384-B68,115 requirements.
6.How does Aetrix verify that BZX384-B68,115 is sourced from the original manufacturer or authorized distributors?
All BZX384-B68,115 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-B68,115 meets industry standards.
7.What is the process for return or replacement of BZX384-B68,115?
All BZX384-B68,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZX384-B68,115, 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-B68,115 part is unused and in its original packaging.
Return procedure for BZX384-B68,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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