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Nexperia USA Inc. BZB784-C6V8-QX
- Part No.:
- BZB784-C6V8-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C6V8-QX.pdf
- Description:
- BZB784-C6V8-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:8,423
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Product details
Overview
BZB784-C6V8-QX from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured with common anode and two independent cathodes (K1, K2), delivering nominal 6.8 V regulation at 5 mA with ±5% tolerance, 30 Ω typical differential resistance, and 3.0 mV/K temperature coefficient - used for precision voltage reference and bidirectional ESD clamping in automotive sensor interfaces.
For engineers reviewing the BZB784-C6V8-QX datasheet, BZB784-C6V8-QX pinout, BZB784-C6V8-QX application, or BZB784-C6V8-QX equivalent, key selection criteria include common-anode dual-Zener topology, AEC-Q101 qualification, 2 µA reverse leakage at 4 V, 350 mW total power dissipation, and SC-70 thermal resistance of 355 K/W (2 diodes loaded).
Technical Context
This dual-Zener device implements a shared-anode configuration enabling symmetrical bidirectional voltage clamping or independent regulation paths. Its 6.8 V nominal Zener voltage is specified at IZ = 5 mA with 30 Ω typical dynamic impedance and 3.0 mV/K positive temperature coefficient - indicating stable regulation over temperature in automotive ambient ranges (−55 °C to +150 °C).
The device supports simultaneous dual-channel operation with ≤200 mA forward current per diode and 40 W non-repetitive peak reverse power handling (100 µs square wave). Thermal performance is defined for FR4 PCB mounting: 355 K/W junction-to-ambient (both diodes active) and 140 K/W junction-to-solder-point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.8 V at IZ = 5 mA - defines precise regulation point for reference or clamping circuits |
| Zener Tolerance | ±5% - ensures predictable voltage window (6.4 V to 7.2 V) for design margining |
| Differential Resistance | 30 Ω typ. at IZ = 5 mA - low impedance maintains regulation stability under load variation |
| Reverse Leakage Current | 2 µA at VR = 4 V - minimal standby loss in high-impedance sensing nodes |
| Total Power Dissipation | 350 mW at Tamb = 25 °C (2 diodes loaded) - sets maximum continuous power budget on standard FR4 |
| Thermal Resistance j-a | 355 K/W - quantifies self-heating impact when both diodes conduct simultaneously |
| AEC-Q101 Qualified | Qualified for automotive applications - meets stress test requirements for discrete semiconductors |
Pinout & Package
Package: SOT323 (SC-70), 3-lead surface-mount plastic package; dimensions 2.0 mm × 1.25 mm × 0.95 mm, 1.3 mm lead pitch, FR4-compatible footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated or clamped node for first Zener path; reverse-biased during regulation |
| 2 (K2) | Cathode of Diode 2 | Independent cathode for second Zener path; enables dual-rail or differential clamping |
| 3 (CA) | Common Anode | Shared anode terminal - ties both Zeners to same reference (e.g., ground or supply rail) |
Key Features
| Feature | Design Value |
|---|---|
| Common-anode dual-Zener topology | Enables compact bidirectional ESD protection or dual-voltage reference without external interconnect |
| ±5% Zener voltage tolerance | Reduces binning requirements and simplifies calibration in automotive sensor signal chains |
| 350 mW total power rating (2 diodes) | Supports sustained clamping during ISO 16750-2 pulse 4a/b surges without derating |
| AEC-Q101 qualification | Validates reliability for under-hood and ADAS module deployment per automotive stress standards |
| Low 2 µA leakage at 4 V | Minimizes quiescent current draw in always-on vehicle networks (e.g., LIN, CAN standby) |
Applications
| Automotive Sensor Signal Conditioning | Bi-directional ESD Protection for Data Lines |
|---|---|
Use Scenario: Clamping analog output of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Dual-Zener voltage regulator acting as precision shunt clamp on sensor output rail and return path. Use Value: Maintains signal integrity within ±6.8 V envelope while dissipating up to 40 W surge energy via common-anode architecture. |
Use Scenario: Protecting RS-485 or CAN FD transceiver I/O pins against IEC 61000-4-2 contact discharge (±8 kV). IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor leveraging symmetric Zener breakdown in both directions from common anode. Use Value: Achieves sub-1 ns response with <2 µA leakage, eliminating need for separate TVS diodes on differential pairs. |
| Low-Power Reference for ADC Biasing | Redundant Voltage Clamp in Safety-Critical Modules |
Use Scenario: Providing stable 6.8 V reference for 12-bit SAR ADCs in battery management systems with tight offset drift budgets. IC Role / Device Role / Timing Role: Precision Zener voltage source feeding ADC reference input with 3.0 mV/K tempco compensation. Use Value: Enables <±0.5 LSB integral nonlinearity over −40 °C to +125 °C without external trimming. |
Use Scenario: Dual-clamp redundancy in airbag controller power rails where single-point failure must be avoided. IC Role / Device Role / Timing Role: Independent Zener paths (K1-CA and K2-CA) provide fault-tolerant overvoltage suppression. Use Value: Ensures continued clamping function even if one Zener junction degrades, meeting ASIL-B functional safety requirements. |
Availability
BZB784-C6V8-QX is available at Aetrix Electronics and suitable for automotive sensor interfaces, bidirectional data line protection, and low-power precision reference circuits requiring stable component supply across extended temperature and lifecycle demands.
Supply support for BZB784-C6V8-QX 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and mobile applications.
The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener regulator portfolio, designed specifically for robust voltage reference and ESD protection in harsh automotive environments.
FAQ
What is the maximum continuous forward current per diode in the BZB784-C6V8-QX?
The absolute maximum forward current per diode is 200 mA at Tamb = 25 °C, as defined in Table 5 (Limiting Values). This rating assumes FR4 PCB mounting with single-sided copper and standard footprint. Derating is required above 25 °C ambient per the thermal resistance values (Rth(j-a) = 355 K/W for dual-diode operation).
How does the common-anode configuration affect circuit implementation compared to discrete Zeners?
The common-anode structure allows both Zener diodes to share a single connection to ground or supply, simplifying PCB layout and reducing component count. It enables true bidirectional clamping (e.g., ±6.8 V around CA) without external wiring, unlike two separate Zeners which require individual anode routing and increase parasitic inductance.
Is the 6.8 V Zener voltage specified at a single test current, and how does it vary with operating conditions?
Yes, nominal 6.8 V is specified at IZ = 5 mA (Table 8). Voltage varies with current due to 30 Ω typical dynamic impedance and exhibits a +3.0 mV/K temperature coefficient - meaning it increases ~0.3 V from −40 °C to +125 °C at fixed 5 mA bias, confirmed in Figures 2–3 of the datasheet.
Can BZB784-C6V8-QX replace single-Zener diodes like BZX84-C6V8 in existing designs?
No - BZB784-C6V8-QX is not a drop-in replacement for single-Zener devices due to its 3-pin common-anode dual-diode structure. It requires circuit redesign to utilize both cathodes and the shared anode; using only one cathode forfeits the dual functionality and alters thermal dissipation characteristics versus a single-die device.
BZB784-C6V8-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- BZB784-Q
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Configuration:
- 1 Pair Common Anode
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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:
- SOT-323
BZB784-C6V8-QX FAQ
1.How can I place an order for BZB784-C6V8-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C6V8-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 BZB784-C6V8-QX reliable?
The price and inventory of BZB784-C6V8-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZB784-C6V8-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C6V8-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C6V8-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C6V8-QX?
BZB784-C6V8-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C6V8-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 BZB784-C6V8-QX?
For technical support, including BZB784-C6V8-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C6V8-QX requirements.
6.How does Aetrix verify that BZB784-C6V8-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C6V8-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 BZB784-C6V8-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C6V8-QX?
All BZB784-C6V8-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C6V8-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 BZB784-C6V8-QX part is unused and in its original packaging.
Return procedure for BZB784-C6V8-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C6V8-QX Tags
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