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Nexperia USA Inc. BZB784-C10-QX
- Part No.:
- BZB784-C10-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C10-QX.pdf
- Description:
- BZB784-C10-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
BZB784-C10-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), providing 9.4 V to 10.6 V nominal regulation at ±5% tolerance, 200 nA reverse current at VR = 7 V, and 50 Ω typical differential resistance at IZ = 5 mA - used for precision voltage clamping and ESD protection in automotive sensor interfaces.
For engineers reviewing the BZB784-C10-QX datasheet, BZB784-C10-QX pinout, BZB784-C10-QX application, or BZB784-C10-QX equivalent, this part supports dual-rail clamping in CAN transceiver I/O protection, low-power rail stabilization in ADAS camera modules, and AEC-Q101-compliant overvoltage suppression in body control units.
Technical Context
This dual-Zener device integrates two independently rated Zener diodes sharing a common anode terminal, enabling bidirectional clamping across two signal paths without external interconnection. Its thermal resistance from junction to solder point is 140 K/W (2 diodes loaded), supporting stable operation up to 150 °C junction temperature under automotive ambient conditions.
The device exhibits a +6.0 mV/K temperature coefficient at IZ = 5 mA and 10 pF diode capacitance at f = 1 MHz, VR = 0 V, making it suitable for high-speed data line protection where low parasitic capacitance and predictable thermal drift are critical - such as LIN bus termination or USB 2.0 port ESD hardening.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal VZ | 10 V (9.4–10.6 V range at ±5% tolerance; defines clamping threshold for 12 V automotive systems) |
| Reverse current IR | 200 nA at VR = 7 V (ensures minimal leakage during standby in always-on vehicle networks) |
| Differential resistance rdiff | 50 Ω typ. at IZ = 5 mA (provides tight voltage regulation under transient load shifts) |
| Non-repetitive peak power | 40 W at tp = 100 µs (handles ISO 7637-2 pulse 1/2/5a surges without degradation) |
| Total power dissipation | 350 mW at Tamb = 25 °C (2 diodes loaded; enables compact placement on dense PCBs) |
| Thermal resistance Rth(j-a) | 355 K/W in free air (2 diodes loaded; informs derating for under-hood thermal environments) |
| Capacitance Cd | 90 pF max. at f = 1 MHz, VR = 0 V (preserves signal integrity on ≤10 Mbps serial buses) |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 3-lead, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body, FR4-compatible footprint per Nexperia sot323_fr layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to first protected node (e.g., CAN_H); reverse-biased during overvoltage events |
| 2 (K2) | Cathode of Diode 2 | Connects to second protected node (e.g., CAN_L); enables symmetrical bidirectional clamping |
| 3 (CA) | Common Anode | Tied to regulated rail (e.g., 12 V supply); establishes shared reference for dual-clamp action |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Stress-tested for automotive reliability: −55 °C to +150 °C operating range, humidity, temperature cycling, and HTRB |
| ±5% VZ tolerance | Enables precise clamping alignment with 12 V system thresholds without post-production trimming |
| Low 200 nA IR at VR = 7 V | Minimizes quiescent current draw in battery-sensitive applications like telematics sleep modes |
| 40 W non-repetitive surge rating | Withstands ISO 16750-2 load dump spikes without parameter shift or failure |
| 140 K/W Rth(j-sp) | Facilitates efficient heat transfer to PCB copper, supporting >10-year field life in engine bay locations |
Applications
| Automotive CAN Transceiver Protection | Body Control Module Voltage Clamp |
|---|---|
|
Use Scenario: Bidirectional overvoltage suppression on CAN_H/CAN_L lines exposed to ESD and load dump transients. IC Role / Device Role / Timing Role: Dual-Zener clamp referenced to 12 V rail, limiting differential and common-mode surges before they reach the transceiver IC. Use Value: Prevents latch-up or permanent damage in TJA1042/TJA1051 transceivers during ISO 10605 ESD events (±8 kV contact) and ISO 7637-2 pulse 1. |
Use Scenario: Stabilizing 5 V logic rails feeding microcontrollers and relays in door module PCBs. IC Role / Device Role / Timing Role: Low-power shunt regulator maintaining rail integrity during alternator ripple and ignition noise bursts. Use Value: Holds output within ±2% of nominal during 100 ms 16 V surges, avoiding MCU brown-out resets in Class 2 vehicle architectures. |
| ADAS Camera Power Rail Guard | LIN Bus Node ESD Hardening |
|
Use Scenario: Protecting 3.3 V image sensor supply and MIPI CSI-2 data lanes from hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Dual-path clamp with CA tied to 3.3 V rail, K1/K2 connected to VDD_IO and MIPI_Dx lines respectively. Use Value: Limits transient overshoot to <3.6 V with <1 ns response, preserving pixel clock stability and preventing frame corruption. |
Use Scenario: Adding robustness to LIN slave nodes (e.g., mirror controls) against ESD in assembly-line handling and service environments. IC Role / Device Role / Timing Role: Common-anode Zener pair clamping LIN bus (12 V) and ground-referenced signal (LIN) simultaneously. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without functional interruption or parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMC2012SCT-10 | Single Zener, 10 V, SOD-323; no dual-cathode configuration | Requires two devices for bidirectional clamping; higher board area and solder joint count | Select when only unidirectional clamping is needed or space allows discrete placement |
| BZX84-C10-Q | Single Zener, 10 V, SOT23; lacks second cathode and common-anode topology | Cannot implement symmetrical dual-rail clamping without external wiring and layout compromise | Choose only for cost-sensitive non-automotive designs where AEC-Q101 is not required |
Compared with DMC2012SCT-10 and BZX84-C10-Q, the BZB784-C10-QX uniquely delivers integrated dual-cathode clamping in one AEC-Q101-qualified SC-70 package - reducing component count by 50%, eliminating routing asymmetry, and guaranteeing matched thermal and electrical behavior between channels.
Availability
BZB784-C10-QX is available at Aetrix Electronics and suitable for automotive sensor interface design, CAN/LIN bus protection, and ADAS power rail stabilization requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZB784-C10-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 essential efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation and ESD protection in harsh automotive environments - including engine control, lighting, and infotainment subsystems.
FAQ
What is the maximum continuous forward current rating for BZB784-C10-QX?
The device is not rated for continuous forward conduction; its primary function is reverse-biased Zener regulation. The absolute maximum forward current is 200 mA per diode, but sustained forward bias exceeds design intent and risks thermal runaway. It must be operated in reverse breakdown for regulation or clamping.
Can BZB784-C10-QX replace single-Zener diodes in existing designs?
Yes, but only when the circuit topology uses a common-anode configuration and requires dual-rail clamping. Direct substitution for single-Zener parts (e.g., BZX84-C10) is not possible without modifying PCB layout and signal routing to accommodate the third terminal (CA) and dual-cathode structure.
How does the +6.0 mV/K temperature coefficient affect regulation accuracy over temperature?
At IZ = 5 mA, the coefficient causes a +0.6 V shift from −40 °C to +125 °C ambient, resulting in a total VZ range of ~9.8 V to 10.4 V across automotive temperature extremes - well within the ±5% initial tolerance and sufficient for most 12 V system clamping requirements.
Is the SOT323 package lead-free and RoHS compliant?
Yes, BZB784-C10-QX is manufactured using lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full material declarations available through Nexperia's compliance portal.
BZB784-C10-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):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 200 nA @ 7 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-C10-QX FAQ
1.How can I place an order for BZB784-C10-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C10-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-C10-QX reliable?
The price and inventory of BZB784-C10-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-C10-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C10-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C10-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C10-QX?
BZB784-C10-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C10-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-C10-QX?
For technical support, including BZB784-C10-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C10-QX requirements.
6.How does Aetrix verify that BZB784-C10-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C10-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-C10-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C10-QX?
All BZB784-C10-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C10-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-C10-QX part is unused and in its original packaging.
Return procedure for BZB784-C10-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C10-QX Tags
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