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Nexperia USA Inc. BZB784-C4V7-QX
- Part No.:
- BZB784-C4V7-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C4V7-QX.pdf
- Description:
- BZB784-C4V7-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:9,751
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Product details
Overview
BZB784-C4V7-Q from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured as two cathodes sharing a common anode. It delivers 4.7 V ±5% nominal regulation at 5 mA, with 425 Ω typical differential resistance and 3 µA reverse current at 1 V, used for precision low-power voltage reference and ESD protection in automotive signal lines.
For engineers reviewing the BZB784-C4V7-Q datasheet, BZB784-C4V7-Q pinout, BZB784-C4V7-Q application, or BZB784-C4V7-Q equivalent, this device supports dual-channel clamping in space-constrained automotive ECUs, CAN transceiver biasing, and I/O rail stabilization where tight tolerance and AEC-Q101 qualification are required.
Technical Context
This dual-Zener diode integrates two independent 4.7 V regulation paths sharing one anode terminal, enabling bidirectional clamping across differential or complementary signal pairs. Its thermal resistance of 140 K/W (2 diodes loaded) and 150 °C max junction temperature support sustained operation in under-hood environments.
The device exhibits a −1.2 mV/K temperature coefficient at 5 mA and 300 pF capacitance at 0 V, making it suitable for low-frequency regulation and transient suppression without signal integrity degradation in 12 V automotive domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 4.7 V ±5% at IZ = 5 mA - ensures stable reference within 0.235 V tolerance for sensor biasing and ADC reference scaling |
| Differential Resistance | 425 Ω typ. at IZ = 5 mA - limits regulation error under load variation in low-current (<10 mA) circuits |
| Reverse Current | 3 µA max. at VR = 1 V - enables ultra-low leakage in always-on monitoring circuits |
| Total Power Dissipation | 350 mW max. at Tamb = 25 °C (2 diodes loaded) - supports dual-channel operation on standard FR4 PCBs without heatsinking |
| Thermal Resistance j-a | 355 K/W (2 diodes loaded, free air) - defines derating curve for ambient temperatures up to +105 °C in engine control modules |
| Non-repetitive Peak Power | 40 W at tp = 100 µs - provides surge immunity against ISO 7637-2 Pulse 1/2a/3a transients in automotive power nets |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode of Diode 1 | Connects to regulated node or protected signal line requiring 4.7 V clamping toward common anode |
| 2 (K2) | Cathode of Diode 2 | Enables independent clamping of second signal path (e.g., complementary CAN_H/CAN_L or RS-485 A/B) |
| 3 (CA) | Common Anode | Single tie-point for bias supply or ground-referenced clamp return; simplifies layout in dual-rail protection schemes |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors |
| ±5% Zener tolerance | Reduces calibration overhead in factory-trimmed systems and enables tighter closed-loop feedback margins |
| Low 300 pF capacitance | Maintains signal integrity above 1 MHz in LIN bus and low-speed CAN interfaces without added filtering |
| Common-anode dual configuration | Eliminates need for two discrete Zeners and matching passives in differential signal protection layouts |
| 150 °C max junction temperature | Supports placement near heat sources in compact ECU modules without thermal derating penalties |
Applications
| Automotive Sensor Biasing | CAN Transceiver Protection |
|---|---|
|
Use Scenario: Providing stable 4.7 V reference to analog output sensors (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Dual-Zener voltage reference and noise filter for sensor excitation circuitry. Use Value: Tight ±5% tolerance and low tempco (−1.2 mV/K) minimize measurement drift across −40 °C to +125 °C operating range. |
Use Scenario: Clamping CAN_H and CAN_L lines against ESD and load-dump transients in vehicle networking nodes. IC Role / Device Role / Timing Role: Bidirectional overvoltage protector with shared anode tied to VCC or ground. Use Value: 40 W non-repetitive peak power rating absorbs ISO 10605 ESD pulses without degradation. |
| Industrial I/O Signal Conditioning | Low-Power Microcontroller Reset Circuit |
|
Use Scenario: Stabilizing 5 V logic rails feeding isolated analog front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-rail voltage clamp for input/output protection and reference generation. Use Value: 350 mW total dissipation allows simultaneous regulation of two 4.7 V rails from single SOT323 footprint. |
Use Scenario: Generating precise reset threshold for 3.3 V microcontrollers using resistor divider + Zener reference. IC Role / Device Role / Timing Role: Low-leakage (3 µA @ 1 V) voltage reference for Brown-Out Detection (BOD) circuitry. Use Value: Ultra-low IR enables high-resistor-divider networks that reduce quiescent current below 1 µA. |
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 |
|---|---|---|---|
| MMBZ5230BS-7-F (Diodes Inc.) | 4.7 V ±5%, SOT-363 package, 200 mW total Ptot, higher rdiff (600 Ω typ.) | Larger footprint (2.2 mm × 1.35 mm), lower surge rating (25 W), not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and thermal performance requirements |
| BZX84-C4V7 (Nexperia) | Single 4.7 V Zener, SOT23, 350 mW, same VZ tolerance and leakage but no dual-cathode topology | Requires two devices and extra routing for dual-rail use; increases board area by 2.5× | Select only for single-channel applications where layout density is not constrained |
Compared with MMBZ5230BS-7-F, BZB784-C4V7-Q offers superior surge immunity and automotive qualification; versus BZX84-C4V7, it reduces component count and layout area by integrating dual regulation into one SOT323 device.
Availability
BZB784-C4V7-Q is available at Aetrix Electronics and suitable for automotive ECU design, industrial I/O module development, and CAN/LIN bus interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for BZB784-C4V7-Q 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 technologies, delivering high-performance, reliable 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 protection in harsh automotive environments.
FAQ
What is the maximum continuous forward current for BZB784-C4V7-Q?
The device is rated for 200 mA maximum forward current per diode under limiting conditions, but its primary operation is in reverse-bias Zener mode. Forward conduction is limited to brief surge events; sustained forward current above 10 mA risks exceeding thermal limits due to 680 K/W junction-to-ambient resistance in single-diode mode.
Can BZB784-C4V7-Q be used for bidirectional TVS protection?
No - it is not designed as a bidirectional TVS. Its common-anode configuration supports unidirectional clamping from either cathode to the shared anode. For true bidirectional protection, two devices or a dedicated bidirectional TVS array would be required.
How does the −1.2 mV/K temperature coefficient affect regulation accuracy over temperature?
At 5 mA, the Zener voltage shifts −1.2 mV per Kelvin rise; over −40 °C to +125 °C (165 K span), total drift is −198 mV, resulting in 4.502 V minimum regulation. This is within acceptable bounds for non-precision biasing but requires compensation in high-accuracy sensor references.
Is the SOT323 footprint compatible with reflow soldering per J-STD-020?
Yes - Nexperia specifies a reflow footprint (Fig. 5) with 0.55 mm solder paste stencil openings and 1.325 mm pad length, fully compliant with J-STD-020D peak temperature profiles up to 260 °C for lead-free processes, validated for automotive-grade reliability.
BZB784-C4V7-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 2 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-C4V7-QX FAQ
1.How can I place an order for BZB784-C4V7-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C4V7-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-C4V7-QX reliable?
The price and inventory of BZB784-C4V7-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-C4V7-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C4V7-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C4V7-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C4V7-QX?
BZB784-C4V7-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C4V7-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-C4V7-QX?
For technical support, including BZB784-C4V7-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C4V7-QX requirements.
6.How does Aetrix verify that BZB784-C4V7-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C4V7-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-C4V7-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C4V7-QX?
All BZB784-C4V7-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C4V7-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-C4V7-QX part is unused and in its original packaging.
Return procedure for BZB784-C4V7-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C4V7-QX Tags
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