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Nexperia USA Inc. BZB784-C9V1-QX
- Part No.:
- BZB784-C9V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C9V1-QX.pdf
- Description:
- BZB784-C9V1-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:9,072
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Product details
Overview
BZB784-C9V1-QX from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured with common anode and two independent cathodes for bidirectional regulation or dual-rail clamping. It delivers 9.1 V nominal working voltage (±5% tolerance), 500 nA reverse leakage at VR = 6 V, and supports ≤200 mA forward current. Used in automotive ESD protection and low-power voltage reference circuits.
For engineers reviewing the BZB784-C9V1-QX datasheet, BZB784-C9V1-QX pinout, BZB784-C9V1-QX application, or BZB784-C9V1-QX equivalent, this page provides verified electrical characteristics, thermal resistance values, AEC-Q101 qualification status, and validated alternative parts for dual-Zener regulation in space-constrained automotive PCBs.
Technical Context
This dual-Zener device integrates two monolithic Zener diodes sharing a common anode terminal, enabling symmetrical clamping or independent rail regulation without external interconnection. Its 9.1 V nominal Zener voltage is specified at IZ = 5 mA with 40 Ω typical differential resistance and +5.2 mV/K temperature coefficient.
Thermal performance is defined for both single- and dual-diode operation: Rth(j-a) is 680 K/W (1 diode loaded) and 355 K/W (2 diodes loaded) on FR4 PCB; Rth(j-sp) is 265 K/W (1 diode) and 140 K/W (2 diodes), supporting reliable power dissipation up to 180 mW (single diode) or 350 mW (dual diode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.5 V to 9.6 V (±5% tolerance at IZ = 5 mA); ensures stable reference under production variation |
| Reverse Leakage (IR) | 500 nA at VR = 6 V; enables ultra-low standby current in battery-backed protection circuits |
| Differential Resistance (rdiff) | 40 Ω typical at IZ = 5 mA; maintains tight regulation across load transients |
| Temperature Coefficient (SZ) | +5.2 mV/K at IZ = 5 mA; predictable positive drift simplifies thermal compensation design |
| Total Power Dissipation (Ptot) | 350 mW (2 diodes loaded on FR4 PCB); defines maximum continuous clamping energy handling |
| Forward Voltage (VF) | 0.9 V max at IF = 10 mA; limits conduction loss during forward-biased surge events |
| Non-repetitive Peak Power (PZSM) | 40 W at tp = 100 µs; supports transient suppression per ISO 7637-2 Pulse 1/2a/5a |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 2.0 mm × 1.25 mm × 0.95 mm body, 1.3 mm lead pitch, FR4-compatible footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node 1; reverse-biased for Zener operation or forward-biased for clamping |
| 2 (K2) | Cathode of Diode 2 | Connects to regulated node 2; enables independent voltage setting or bidirectional protection |
| 3 (CA) | Common Anode | Shared anode connection; ties both diodes to ground or reference potential in clamp configuration |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including temperature cycling, HTRB, and ESD stress |
| ±5% VZ tolerance | Reduces need for post-production trimming in precision reference designs |
| Low IR at VR = 6 V | 500 nA leakage minimizes quiescent current drain in always-on vehicle modules |
| Common-anode dual-diode topology | Eliminates external wiring for dual-rail clamping; saves PCB area vs. discrete dual-Zener solution |
| 350 mW total dissipation | Supports sustained clamping in CAN/LIN bus nodes without thermal derating on standard FR4 |
Applications
| Automotive CAN Transceiver Protection | Low-Power Sensor Reference |
|---|---|
Use Scenario: Protecting high-speed CAN FD transceivers against ISO 7637-2 load dump and ESD events. IC Role / Device Role / Timing Role: Dual-Zener clamp referenced to ground, absorbing bidirectional surges on CANH/CANL lines. Use Value: 40 W peak power rating and 500 nA leakage ensure signal integrity retention and zero standby current penalty. |
Use Scenario: Providing stable 9.1 V reference for analog front-end of tire pressure monitoring sensors. IC Role / Device Role / Timing Role: Precision Zener voltage source with +5.2 mV/K TC, used in ratiometric ADC biasing. Use Value: ±5% VZ tolerance and 40 Ω rdiff enable direct use without calibration in cost-sensitive TPMS modules. |
| Infotainment USB Port Clamping | Body Control Module Voltage Supervisor |
Use Scenario: ESD protection on USB 2.0 D+/D− lines in automotive infotainment head units. IC Role / Device Role / Timing Role: Common-anode dual diode clamping each data line to ground during IEC 61000-4-2 contact discharge. Use Value: 0.9 V VF and 355 K/W Rth(j-a) allow fast response and self-cooling during repeated 8 kV discharges. |
Use Scenario: Monitoring microcontroller supply rail (9 V system) for brown-out detection in door module ECUs. IC Role / Device Role / Timing Role: Zener-based comparator reference with predictable +5.2 mV/K drift over −40 °C to +125 °C. Use Value: AEC-Q101 qualification and 150 °C Tj rating guarantee reliability in sealed, thermally isolated junction boxes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMN3026LSD-13 | Single-channel N-channel MOSFET with integrated Zener; no dual-cathode topology | Designed for load switch protection, not bidirectional clamping | Select only if replacing discrete MOSFET+Zener combo, not for dual-rail regulation |
| BZX84-C9V1,115 | Single Zener in SOT23; no common-anode dual-diode structure | Requires two devices and extra routing for dual-rail use; 2× PCB area | Choose when board layout allows duplication and thermal budget permits separate dissipation paths |
Compared with BZX84-C9V1,115, the BZB784-C9V1-QX reduces component count and layout area by 50% while maintaining identical VZ and leakage; versus DMN3026LSD-13, it provides true dual-Zener functionality without gate drive complexity or RDS(on) dependency.
Availability
BZB784-C9V1-QX is available at Aetrix Electronics and suitable for automotive CAN bus protection, sensor reference design, and body control module voltage supervision requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for BZB784-C9V1-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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization.
The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for compact, thermally efficient voltage regulation and transient protection in automotive electronics.
FAQ
What is the maximum continuous forward current for BZB784-C9V1-QX?
The absolute maximum forward current is 200 mA per diode, as defined in Table 5 of the datasheet. This rating applies at Tamb = 25 °C on FR4 PCB with standard footprint; derating is required above 25 °C ambient per the thermal resistance values (Rth(j-a) = 680 K/W for single diode).
Does BZB784-C9V1-QX support bidirectional clamping out-of-the-box?
Yes - its common-anode dual-cathode configuration enables immediate bidirectional clamping when CA is grounded and K1/K2 connect to protected lines. No external components are needed to implement symmetric ±9.1 V clamping relative to ground.
How does the +5.2 mV/K temperature coefficient affect regulation accuracy?
At IZ = 5 mA, VZ increases by 5.2 mV per Kelvin rise in junction temperature. Over −40 °C to +125 °C, this yields ~0.85 V total drift, which must be accounted for in precision references but is acceptable for protection and supervisory functions.
Is the SOT323 package compatible with standard reflow profiles?
Yes - Nexperia provides dedicated reflow soldering footprints (Fig. 5) and qualifies the device for JEDEC J-STD-020 moisture sensitivity level 1. The SC-70 outline meets IPC-7351B density level A requirements for automated assembly.
BZB784-C9V1-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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 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:
- SOT-323
BZB784-C9V1-QX FAQ
1.How can I place an order for BZB784-C9V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C9V1-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-C9V1-QX reliable?
The price and inventory of BZB784-C9V1-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-C9V1-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C9V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C9V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C9V1-QX?
BZB784-C9V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C9V1-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-C9V1-QX?
For technical support, including BZB784-C9V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C9V1-QX requirements.
6.How does Aetrix verify that BZB784-C9V1-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C9V1-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-C9V1-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C9V1-QX?
All BZB784-C9V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C9V1-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-C9V1-QX part is unused and in its original packaging.
Return procedure for BZB784-C9V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C9V1-QX Tags
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