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Nexperia USA Inc. BZB784-C3V6-QX
- Part No.:
- BZB784-C3V6-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C3V6-QX.pdf
- Description:
- BZB784-C3V6-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:5,107
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Product details
Overview
BZB784-C3V6-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 3.6 V nominal working voltage (±5% tolerance), 375 Ω typical differential resistance at 5 mA, and supports ≤200 mA forward current. Used in automotive ESD protection and low-power voltage reference circuits.
For engineers reviewing the BZB784-C3V6-QX datasheet, BZB784-C3V6-QX pinout, BZB784-C3V6-QX application, or BZB784-C3V6-QX equivalent, this page provides verified electrical characteristics, thermal behavior under single/dual diode loading, AEC-Q101 qualification status, and precise SC-70 footprint data - all critical for board-level surge immunity design and dual-rail clamp layout.
Technical Context
This dual-Zener device integrates two monolithic Zener junctions sharing a common anode terminal, enabling symmetrical clamping across a single node or independent regulation on two signal paths. Its 3.6 V nominal Zener voltage is specified at IZ = 5 mA with 375 Ω typical dynamic impedance and −1.9 mV/K temperature coefficient.
Thermal performance is defined for both single-diode (680 K/W Rth(j-a)) and dual-diode (355 K/W Rth(j-a)) operation on FR4 PCB, with non-repetitive peak reverse power dissipation rated at 40 W (100 µs square wave). Reverse leakage is 5 µA max at VR = 3.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 3.4 V to 3.8 V (±5% tolerance at IZ = 5 mA); defines clamping threshold for overvoltage protection |
| Differential Resistance rdiff | 375 Ω typ. (at IZ = 5 mA); determines voltage deviation under load current changes |
| Forward Voltage VF | 0.9 V max (at IF = 10 mA); sets conduction loss during forward-biased transient suppression |
| Reverse Leakage IR | 5 µA max (at VR = 3.4 V); ensures minimal standby current in high-impedance regulation nodes |
| Total Power Dissipation Ptot | 350 mW max (2 diodes loaded on FR4 PCB); constrains continuous thermal design margin |
| Non-repetitive Peak Power | 40 W (100 µs square wave); enables single-event surge handling without degradation |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
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 per Fig. 5 and Fig. 6 of datasheet Rev. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | K1 (Cathode 1) | Anode-referenced Zener junction for first regulation path; connects to protected node 1 |
| 2 | K2 (Cathode 2) | Anode-referenced Zener junction for second regulation path; isolates clamping function from node 1 |
| 3 | CA (Common Anode) | Shared anode connection; ties both Zeners to reference rail (e.g., GND or VCC) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Zener topology with common anode | Enables compact dual-rail clamping or bidirectional TVS functionality in one SC-70 footprint |
| ±5% VZ tolerance | Guarantees predictable clamping voltage across production lots without post-assembly calibration |
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment applications requiring extended temperature range (−55 °C to +150 °C) |
| Low thermal resistance to solder point | Rth(j-sp) = 140 K/W (2 diodes loaded) improves transient power handling via PCB copper conduction |
| ESD robustness | Qualified to IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) per AEC-Q101 stress test flow |
Applications
| Automotive CAN Transceiver Protection | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Clamping transients on CAN_H/CAN_L lines in 12 V vehicle networks exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Dual-rail Zener clamp referenced to ground, absorbing bidirectional surges while maintaining bus integrity. Use Value: 3.6 V Zener voltage aligns with CAN transceiver common-mode range; 40 W peak power handles ISO 7637-2 Pulse 5a without failure. |
Use Scenario: Stabilizing analog output of 3.3 V rail-powered pressure sensors in PLC I/O modules subject to field wiring transients. IC Role / Device Role / Timing Role: Low-leakage (5 µA) voltage reference and overvoltage limiter on sensor output line before ADC input. Use Value: 375 Ω dynamic impedance ensures <±15 mV regulation error under 100 µA load shifts; AEC-Q101 grade assures long-term stability in industrial environments. |
| USB 2.0 Data Line ESD Protection | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Protecting D+ and D− lines of embedded USB peripherals against IEC 61000-4-2 ESD events in consumer and medical devices. IC Role / Device Role / Timing Role: Common-anode dual Zener providing symmetrical ±3.6 V clamping relative to ground, minimizing signal distortion. Use Value: 0.9 V forward voltage limits voltage drop during positive ESD strikes; SC-70 size fits tight 0.5 mm pitch routing near USB connectors. |
Use Scenario: Generating a stable reset threshold for 3.3 V microcontrollers where supply brown-out detection must trigger below 3.0 V. IC Role / Device Role / Timing Role: Precision Zener reference feeding comparator input; second diode unused or paralleled for redundancy. Use Value: ±5% VZ tolerance ensures reset assertion between 3.42 V and 3.78 V; 5 µA leakage avoids loading weak bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BS-7-F (Diodes Inc.) | 3.3 V nominal Zener, ±5% tolerance, SOT-363 package (larger than SOT323), 300 mW total Ptot | Higher footprint area (2.2 mm × 1.35 mm vs. 2.0 mm × 1.25 mm); lower power rating limits surge handling | Select when existing layout accommodates SOT-363 and 3.3 V clamping suffices |
| BZX84-C3V6 (Nexperia) | Single 3.6 V Zener, SOT23 package, same ±5% tolerance and AEC-Q101 qualification, but no dual-cathode topology | Requires two devices for dual-rail use; increases BOM count and PCB area versus integrated dual-diode solution | Select only if dual-cathode functionality is unnecessary and cost-per-device is prioritized over board space |
Compared with MMBZ5226BS-7-F and BZX84-C3V6, BZB784-C3V6-QX uniquely delivers dual-cathode regulation in the smallest qualified SC-70 footprint, enabling 30% smaller board area for bidirectional clamping while maintaining 40 W surge capability and automotive reliability.
Availability
BZB784-C3V6-QX is available at Aetrix Electronics and suitable for automotive CAN protection, industrial sensor interface conditioning, and USB 2.0 ESD suppression requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for BZB784-C3V6-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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-performance, high-reliability discrete and logic devices 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 transient suppression in space-constrained automotive and industrial control systems.
FAQ
What is the maximum continuous power dissipation for BZB784-C3V6-QX when used with both diodes active?
The maximum total power dissipation is 350 mW at Tamb = 25 °C on a standard FR4 PCB with single-sided copper. This rating assumes both Zener junctions are simultaneously conducting under DC or low-frequency conditions, and derating is required above 25 °C ambient per the thermal resistance of 355 K/W.
Can BZB784-C3V6-QX be used for bidirectional ESD protection on a single signal line?
Yes - by connecting CA to ground and routing the signal through K1 and K2 in parallel, the device provides symmetrical ±3.6 V clamping. Its 5 µA reverse leakage at 3.4 V and 0.9 V forward voltage ensure minimal signal distortion and fast turn-on during ±8 kV contact ESD events per IEC 61000-4-2.
How does the temperature coefficient affect regulation accuracy over automotive temperature range?
The specified −1.9 mV/K coefficient means VZ decreases by ~190 mV from −40 °C to +125 °C. At IZ = 5 mA, this results in a total shift of approximately ±0.3 V across the full AEC-Q101 range, which remains within system-level tolerance for most clamping applications where absolute precision is secondary to robustness.
Is the SOT323 footprint compatible with standard reflow soldering profiles?
Yes - Nexperia provides validated reflow footprint dimensions (2.65 mm × 2.35 mm pad area, 0.55 mm stencil aperture) in Figure 5 of the datasheet. The device supports JEDEC J-STD-020D-compliant peak temperatures up to 260 °C, with thermal resistance data confirming safe operation under standard Pb-free reflow cycles.
BZB784-C3V6-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 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-C3V6-QX FAQ
1.How can I place an order for BZB784-C3V6-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C3V6-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-C3V6-QX reliable?
The price and inventory of BZB784-C3V6-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-C3V6-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C3V6-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C3V6-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C3V6-QX?
BZB784-C3V6-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C3V6-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-C3V6-QX?
For technical support, including BZB784-C3V6-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C3V6-QX requirements.
6.How does Aetrix verify that BZB784-C3V6-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C3V6-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-C3V6-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C3V6-QX?
All BZB784-C3V6-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C3V6-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-C3V6-QX part is unused and in its original packaging.
Return procedure for BZB784-C3V6-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C3V6-QX Tags
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