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Nexperia USA Inc. BZX84-B68,215
- Part No.:
- BZX84-B68,215
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-B68,215.pdf
- Description:
- DIODE ZENER 68V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
BZX84-B68,215 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 68 V nominal breakdown voltage at IZ = 2 mA, with 250 mW total power dissipation and 40 W non-repetitive peak reverse power capability. It serves as a precision reference or overvoltage clamp in low-power analog supply rails, sensor biasing circuits, and microcontroller reset supervision.
For engineers reviewing the BZX84-B68,215 datasheet, BZX84-B68,215 pinout, BZX84-B68,215 application, or BZX84-B68,215 equivalent, key selection criteria include its 68 V Zener voltage tolerance (±2 %), differential resistance of 475 Ω at IZ = 2 mA, temperature coefficient of +0.05 mV/K, and SOT23-compatible thermal resistance (Rth(j-a) = 500 K/W).
Technical Context
This device operates in reverse-bias breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load or input conditions. Its Zener mechanism provides predictable regulation with low dynamic impedance (rdif = 475 Ω) and minimal temperature drift (SZ = +0.05 mV/K at IZ = 2 mA).
Designed for surface-mount use on FR4 PCBs with standard footprint, it supports pulsed surge handling up to 40 W (tp = 100 μs) and continuous operation up to 150 °C junction temperature. The "B" suffix denotes ±2 % voltage tolerance, distinguishing it from ±1 % (A) and ±5 % (C) variants in the same series.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V nominal at IZ = 2 mA; ±2 % tolerance ensures regulation within 66.64–69.36 V under specified test conditions. |
| Differential Resistance (rdif) | 475 Ω max at IZ = 2 mA; defines small-signal impedance affecting regulation accuracy under load variation. |
| Total Power Dissipation (Ptot) | 250 mW at Tamb ≤ 25 °C on FR4 PCB; sets maximum steady-state power handling before thermal derating applies. |
| Non-repetitive Peak Reverse Power (PZSM) | 40 W for tp = 100 μs square wave; enables transient overvoltage clamping without failure. |
| Reverse Current (IR) | 240 μA max at VR = 52 V; quantifies leakage below breakdown, critical for low-power standby circuits. |
| Temperature Coefficient (SZ) | +0.05 mV/K at IZ = 2 mA; indicates near-zero voltage drift over temperature, supporting stable references. |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; defines conduction loss when used in forward-biased protection or logic-level detection. |
Pinout & Package
Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions per Figure 11 (1.9 mm × 1.1 mm × 1.0 mm height).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connected to lower-potential node during Zener operation (reverse bias). |
| 2 | Not Connected (n.c.) | Internal die pad with no electrical connection; must remain unconnected in PCB layout to avoid parasitic coupling. |
| 3 | Cathode (K) | Reverse-bias terminal; connected to higher-potential node to enable Zener conduction and voltage regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-power regulation | 250 mW Ptot enables integration into space-constrained, battery-powered systems without heatsinking. |
| ±2 % voltage tolerance | Ensures tighter output stability than ±5 % variants, reducing calibration overhead in precision analog circuits. |
| High surge robustness | 40 W non-repetitive peak power rating allows reliable clamping of ESD or inductive kick transients. |
| Stable temperature behavior | +0.05 mV/K coefficient minimizes drift across –55 °C to +150 °C ambient range, supporting industrial environments. |
| SOT23 compatibility | Standard footprint aligns with automated assembly processes and widely supported CAD libraries for rapid prototyping. |
Applications
| Power Supply Reference | Sensor Biasing |
|---|---|
|
Use Scenario: Providing stable 68 V reference for high-voltage DC-DC converter feedback networks or op-amp comparator thresholds. IC Role / Device Role / Timing Role: Zener voltage reference element establishing precise trip point for regulation loop error amplifiers. Use Value: Maintains ±2 % output accuracy over temperature and line/load variations, eliminating need for trimming resistors. |
Use Scenario: Biasing photodiodes or avalanche photodetectors requiring stable reverse-bias voltage near breakdown. IC Role / Device Role / Timing Role: Precision voltage source setting detector operating point while minimizing leakage-induced noise. Use Value: Low 240 μA reverse current at 52 V and +0.05 mV/K temperature coefficient ensure signal integrity in low-light sensing. |
| Microcontroller Reset Supervision | Overvoltage Clamp |
|
Use Scenario: Monitoring 60–70 V rail in automotive body control modules to assert reset if voltage exceeds safe threshold. IC Role / Device Role / Timing Role: Threshold detector triggering external reset IC or GPIO interrupt upon overvoltage event. Use Value: Sharp 68 V breakdown with 475 Ω rdif delivers fast, repeatable activation without hysteresis components. |
Use Scenario: Protecting downstream MOSFET gates or ADC inputs from 80 V transients induced by relay switching or motor commutation. IC Role / Device Role / Timing Role: Transient voltage suppressor shunting excess energy to ground during surge events. Use Value: 40 W peak power rating handles 100 μs surges without degradation, complementing TVS diodes in multi-stage protection. |
Availability
BZX84-B68,215 is available at Aetrix Electronics and suitable for power supply reference, sensor biasing, and overvoltage clamp applications requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for BZX84-B68,215 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 optimized for efficiency and miniaturization in consumer, industrial, and communications markets.
The BZX84 series belongs to Nexperia's voltage regulator diode product line, engineered for low-power precision regulation in space-constrained SMT designs where tight voltage tolerance and thermal stability are essential.
FAQ
What is the Zener voltage tolerance and test condition for BZX84-B68,215?
The BZX84-B68,215 has a ±2 % Zener voltage tolerance, verified at IZ = 2 mA and Tj = 25 °C. This yields a guaranteed breakdown range of 66.64 V to 69.36 V under those conditions, as confirmed in Table 9 of the Rev. 7 datasheet.
Can BZX84-B68,215 be used in place of a 68 V ±5 % Zener diode?
Yes, but with design implications: the tighter ±2 % tolerance improves regulation accuracy but increases cost and may require revalidation of margin in circuits relying on wider voltage spread for fault detection or hysteresis. Differential resistance (475 Ω vs. ~500 Ω for C-grade) also affects load regulation.
What is the maximum allowable ambient temperature for continuous operation at full 250 mW dissipation?
Full 250 mW dissipation is only rated at Tamb ≤ 25 °C on an FR4 PCB with single-sided 70 µm copper. Above 25 °C, linear derating applies starting at 2.0 mW/°C (per Rth(j-a) = 500 K/W), reaching zero power at 150 °C ambient.
Is Pin 2 electrically functional, and how should it be handled in PCB layout?
No - Pin 2 is internally not connected (n.c.), as stated in Table 2 (Pinning Information). It must remain unconnected on the PCB; routing traces or applying solder paste to this pad risks mechanical stress or unintended coupling, potentially degrading reliability or EMI performance.
BZX84-B68,215 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZX84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 68 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 240 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 47.6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-B68,215 FAQ
1.How can I place an order for BZX84-B68,215 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-B68,215 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 BZX84-B68,215 reliable?
The price and inventory of BZX84-B68,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-B68,215 is usually 5 days.
3.What payment methods are accepted for BZX84-B68,215?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-B68,215 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-B68,215?
BZX84-B68,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-B68,215 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 BZX84-B68,215?
For technical support, including BZX84-B68,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-B68,215 requirements.
6.How does Aetrix verify that BZX84-B68,215 is sourced from the original manufacturer or authorized distributors?
All BZX84-B68,215 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 BZX84-B68,215 meets industry standards.
7.What is the process for return or replacement of BZX84-B68,215?
All BZX84-B68,215 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-B68,215, 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 BZX84-B68,215 part is unused and in its original packaging.
Return procedure for BZX84-B68,215:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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