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Nexperia USA Inc. BZB84-C68-QR
- Part No.:
- BZB84-C68-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZB84-C68-QR.pdf
- Description:
- BZB84-C68-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,352
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Product details
Overview
BZB84-C68-QR from Nexperia is a dual Zener diode in SOT23 package with common-anode configuration, rated for 68 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and AEC-Q101 qualification for automotive use. It provides precision voltage regulation and transient suppression in compact space-constrained circuits such as ECU power rails and sensor bias networks.
For engineers reviewing the BZB84-C68-QR datasheet, BZB84-C68-QR pinout, BZB84-C68-QR application, or BZB84-C68-QR equivalent, key selection criteria include its dual-diode common-anode topology, 68 V Zener voltage tolerance, non-repetitive peak reverse power capability of 40 W, and thermal resistance of 100 K/W junction-to-solder-point - all critical for automotive-grade voltage clamping and reference design.
Technical Context
This dual Zener diode integrates two independent Zener elements sharing a common anode terminal, enabling bidirectional voltage regulation or dual-rail referencing from a single footprint. Its differential resistance of 475 Ω at IZ = 2 mA and temperature coefficient of +0.05 mV/K support stable regulation under varying load and thermal conditions.
The device operates across –55 °C to +150 °C ambient range and sustains 40 W non-repetitive surge power for 100 µs pulses, with junction-to-solder-point thermal resistance of 100 K/W - optimized for PCB-mounted automotive electronics where thermal coupling to copper pour is essential for reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 64.0 V to 72.0 V (±5 % tolerance at IZ = 2 mA); ensures predictable clamping threshold in 12 V/24 V automotive systems. |
| Total Power Dissipation Ptot | 300 mW at Tamb ≤ 25 °C on FR4 PCB; defines continuous DC power handling in surface-mount regulator designs. |
| Non-repetitive Peak Reverse Power PZSM | 40 W for 100 µs square wave; enables robust transient voltage suppression against load-dump spikes. |
| Differential Resistance rdif | 475 Ω at IZ = 2 mA; determines regulation stiffness and output impedance in reference applications. |
| Reverse Current IR | ≤ 0.05 µA at VR = 52.5 V; guarantees low leakage in high-impedance bias networks. |
| Junction-to-Solder-Point Rth(j-sp) | 100 K/W; quantifies thermal path efficiency to PCB copper, critical for sustained operation in engine bay environments. |
| Operating Temperature Range | –55 °C to +150 °C; validated for under-hood automotive placement per AEC-Q101 stress testing. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch) with gull-wing leads and standardized footprint per Fig. 12 (reflow) and Fig. 13 (wave).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K1 (cathode of diode 1) | Provides cathode connection for first Zener element; routed to regulated node requiring 68 V reference or clamping. |
| 2 | K2 (cathode of diode 2) | Provides cathode connection for second Zener element; supports dual-rail referencing or redundancy in safety-critical paths. |
| 3 | CA (common anode) | Shared anode node; connects to system ground or negative rail, enabling bidirectional voltage limiting between two cathodes. |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode Zener topology | Enables compact dual-voltage referencing or symmetrical clamping without discrete component pairing. |
| AEC-Q101 qualification | Validated for automotive use via stress tests including HTGB, HTRB, and temperature cycling - no derating required for qualified applications. |
| ±5 % Zener voltage tolerance (C-series) | Meets cost-sensitive automotive subsystem requirements where tight regulation is secondary to robustness and footprint efficiency. |
| 40 W non-repetitive surge rating | Withstands ISO 7637-2 Pulse 5a load-dump transients without degradation when properly heatsinked on PCB copper. |
| 100 K/W junction-to-solder-point thermal resistance | Allows direct thermal coupling to internal PCB planes, reducing need for external heatsinking in space-constrained ECUs. |
Applications
| Engine Control Unit (ECU) Power Rail Clamping | Automotive Sensor Bias Reference |
|---|---|
Use Scenario: Protecting microcontroller I/O and analog front-end inputs from load-dump transients in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Dual Zener acts as bidirectional clamp between VCC and GND, with CA tied to GND and K1/K2 connected to protected nodes. Use Value: 40 W surge rating and 150 °C junction rating ensure survival during ISO 7637-2 Pulse 5a events without circuit interruption. |
Use Scenario: Providing stable 68 V bias for Hall-effect or current-sense amplifier input stages in battery management modules. IC Role / Device Role / Timing Role: Functions as precision shunt reference; CA grounded, K1 supplies regulated voltage to sensor signal chain. Use Value: 475 Ω differential resistance and +0.05 mV/K tempco maintain < ±1 % output drift over –40 °C to +125 °C operating range. |
| Body Control Module (BCM) Voltage Supervisor | ADAS Camera Module Power Sequencing |
Use Scenario: Monitoring 12 V supply integrity in BCMs by comparing regulated 68 V reference against scaled-down rail voltage. IC Role / Device Role / Timing Role: Serves as stable Zener reference for comparator-based undervoltage/overvoltage detection circuitry. Use Value: Low 0.05 µA reverse leakage at 52.5 V ensures minimal current draw in always-on monitoring circuits. |
Use Scenario: Enabling controlled power-up sequencing for image sensor and ISP ICs requiring precise voltage ramp timing. IC Role / Device Role / Timing Role: Dual cathodes used to generate staggered enable thresholds - e.g., K1 triggers 68 V rail, K2 triggers auxiliary 5 V LDO after delay. Use Value: Common-anode architecture eliminates need for separate ground return paths, reducing layout complexity and noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5268T1G | Single Zener (68 V, ±5 %), SOT23, 500 mW Ptot, no dual configuration | Requires two devices for dual-rail use; higher continuous power but lacks integrated common-anode topology | Select when higher continuous dissipation is needed and board area allows discrete pairing. |
| Vishay BZX84-C68-TP | Single Zener (68 V, ±5 %), SOT23, 300 mW Ptot, AEC-Q101 qualified, no dual configuration | Matches power and tolerance but cannot replicate bidirectional clamping or dual-reference functionality | Choose only for single-node regulation where dual-cathode operation is unnecessary. |
Compared with BZB84-C68-QR, MMBZ5268T1G offers higher continuous power but requires duplication for dual functionality, while BZX84-C68-TP matches basic specs but lacks the integrated dual-cathode/common-anode architecture essential for space-efficient automotive clamping and referencing.
Availability
BZB84-C68-QR is available at Aetrix Electronics and suitable for automotive ECU protection, sensor biasing, and ADAS power sequencing requiring stable component supply with AEC-Q101 compliance and SOT23 footprint compatibility.
Supply support for BZB84-C68-QR 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 logic, discrete, and MOSFET solutions, with leadership in automotive-qualified components.
The BZB84-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation, clamping, and reference applications where space, thermal performance, and qualification rigor are mandatory.
FAQ
What is the maximum non-repetitive peak reverse current for BZB84-C68-QR?
The non-repetitive peak reverse current IZSM is 0.25 A at 100 µs pulse width and Tj = 25 °C prior to surge, derived from the 40 W peak power rating and 68 V Zener voltage. This value is confirmed in Table 9 of the datasheet and applies strictly to single-event transient suppression, not continuous operation.
Can BZB84-C68-QR be used in parallel for higher power handling?
No - the BZB84-C68-QR is not designed for parallel operation due to mismatch in Zener voltage and dynamic impedance between units, which causes current imbalance and potential thermal runaway. Its 300 mW total dissipation is specified per device on standard FR4 PCB; higher power must be achieved via external heatsinking or alternative topologies.
Is the common anode (CA) pin electrically isolated from the package substrate?
Yes - Pin 3 (CA) is the sole anode connection and is electrically isolated from the SOT23 plastic package body. The datasheet confirms no internal connection exists between CA and the mold compound or leadframe thermal pad; thermal conduction occurs only through solder joints to PCB copper.
How does the temperature coefficient affect regulation accuracy at 125 °C ambient?
At IZ = 2 mA, the temperature coefficient is +0.05 mV/K, resulting in a +5.1 V shift from 25 °C to 125 °C - approximately +7.5 % deviation from nominal 68 V. This is documented in Figure 10 and Table 9, and must be accounted for in high-temperature reference designs using calibration or compensation.
BZB84-C68-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZB84-Q
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Configuration:
- 1 Pair Common Anode
- 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:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZB84-C68-QR FAQ
1.How can I place an order for BZB84-C68-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB84-C68-QR 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 BZB84-C68-QR reliable?
The price and inventory of BZB84-C68-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB84-C68-QR is usually 5 days.
3.What payment methods are accepted for BZB84-C68-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB84-C68-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB84-C68-QR?
BZB84-C68-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB84-C68-QR 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 BZB84-C68-QR?
For technical support, including BZB84-C68-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB84-C68-QR requirements.
6.How does Aetrix verify that BZB84-C68-QR is sourced from the original manufacturer or authorized distributors?
All BZB84-C68-QR 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 BZB84-C68-QR meets industry standards.
7.What is the process for return or replacement of BZB84-C68-QR?
All BZB84-C68-QR units undergo pre-shipment inspection (PSI). If there is an issue with BZB84-C68-QR, 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 BZB84-C68-QR part is unused and in its original packaging.
Return procedure for BZB84-C68-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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