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Nexperia USA Inc. BZB784-C5V1-QX
- Part No.:
- BZB784-C5V1-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Zener Diode Arrays
- Package:
- SC-70, SOT-323
- Datasheet:
-
BZB784-C5V1-QX.pdf
- Description:
- BZB784-C5V1-Q/SOT323/SC-70
- Quantity:
- Payment:
- Shipping:
Inventory:7,534
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Product details
Overview
BZB784-C5V1-QX from Nexperia is a dual Zener voltage regulator diode in SOT323 (SC-70) package, configured as two cathodes (K1, K2) sharing a common anode (CA), with nominal 5.1 V working voltage, ±5% tolerance, 2 µA reverse current at VR = 5.1 V, and 400 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-C5V1-QX datasheet, BZB784-C5V1-QX pinout, BZB784-C5V1-QX application, or BZB784-C5V1-QX equivalent, this page delivers verified electrical characteristics, AEC-Q101 qualification status, thermal resistance values, and dual-diode configuration details critical for automotive power rail stabilization and bidirectional transient suppression.
Technical Context
This dual-Zener device implements two independent 5.1 V regulation paths sharing one anode terminal, enabling symmetrical clamping of differential signals or redundant voltage reference generation. Its −0.5 mV/K temperature coefficient at IZ = 5 mA ensures stable regulation across −55 °C to +150 °C ambient range.
Designed for automotive-grade reliability, it supports non-repetitive peak reverse power dissipation up to 40 W (tp = 100 µs) and total power dissipation of 350 mW with both diodes active on FR4 PCB - meeting ISO 16750-2 pulse test requirements for load dump and jump-start transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VZ) | 4.8 V to 5.4 V (±5% tolerance at IZ = 5 mA; enables precise 5.1 V rail clamping) |
| Reverse Current (IR) | 2 µA at VR = 5.1 V (low leakage preserves signal integrity in high-impedance sensor nodes) |
| Differential Resistance (rdiff) | 400 Ω typ. at IZ = 5 mA (stable regulation under varying load current in feedback loops) |
| Temperature Coefficient (SZ) | −0.5 mV/K at IZ = 5 mA (minimal drift over automotive temperature range) |
| Total Power Dissipation (Ptot) | 350 mW at Tamb = 25 °C (both diodes loaded on FR4 PCB; supports sustained clamp duty) |
| Junction Temperature (Tj) | 150 °C max (enables operation in engine bay and transmission control modules) |
| ESD Rating | AEC-Q101 qualified (meets automotive stress test requirements for human-body model and machine model) |
Pinout & Package
Package: SOT323 (SC-70), 3-lead surface-mount plastic 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) | Provides first 5.1 V clamping path from CA to external node; used for positive rail protection |
| 2 | K2 (cathode of diode 2) | Provides second 5.1 V clamping path from CA to external node; enables bidirectional or differential clamping |
| 3 | CA (common anode) | Shared anode connection; ties both Zeners to regulated reference point (e.g., MCU VREF or sensor ground) |
Key Features
| Feature | Design Value |
|---|---|
| Dual Zener topology | Two independent 5.1 V regulation elements sharing one anode - reduces component count in differential signal protection |
| AEC-Q101 qualification | Qualified per Stress Test Qualification for Discrete Semiconductors - validated for automotive under-hood use |
| Low thermal resistance | Rth(j-sp) = 140 K/W (2 diodes loaded) - improves power handling during surge events without derating |
| Tight voltage tolerance | ±5% VZ at IZ = 5 mA - ensures predictable clamping threshold in safety-critical sensor circuits |
| Low leakage current | 2 µA IR at VR = 5.1 V - minimizes quiescent current draw in always-on vehicle networks |
Applications
| Automotive Sensor Interface Protection | USB-C Port ESD Clamp |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ISO 10605 ESD pulses and load-dump transients. IC Role / Device Role / Timing Role: Dual-Zener clamping element placed between signal line and regulated reference (CA tied to VREF or clean ground). Use Value: Simultaneous clamping of both signal polarity excursions using single-component dual-diode structure, reducing PCB area by 35% vs. discrete pair. |
Use Scenario: Bidirectional ESD protection on USB-C CC and SBU lines where space-constrained layout prohibits separate TVS arrays. IC Role / Device Role / Timing Role: Low-capacitance (300 pF) voltage clamp with matched 5.1 V thresholds on both cathodes relative to shared anode. Use Value: Enables sub-1 mm² footprint for dual-line protection while maintaining < 1 ns response time and < 10 V clamping voltage under 8 kV HBM. |
| Engine Control Unit (ECU) Reference Stabilization | Industrial CAN Transceiver Biasing |
Use Scenario: Providing stable 5.1 V reference for ADC biasing and op-amp input conditioning in engine control modules operating at 125 °C junction temperature. IC Role / Device Role / Timing Role: Precision Zener shunt regulator supplying low-noise reference to analog front-end circuitry. Use Value: −0.5 mV/K tempco and 400 Ω rdiff ensure reference drift < ±15 mV across full automotive temperature range. |
Use Scenario: Biasing termination resistors and common-mode voltage setting in isolated CAN FD transceivers deployed in heavy-duty vehicle telematics units. IC Role / Device Role / Timing Role: Dual-clamp regulating both CANH and CANL rails to symmetric 5.1 V offset relative to isolated ground plane. Use Value: Eliminates need for two separate Zeners, improving matching of common-mode voltage and reducing inter-channel skew in high-speed CAN physical layer. |
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 |
|---|---|---|---|
| MMBZ5221BS-7-F | Single 2.4 V Zener in SOT-323; no dual configuration; 10 µA IR at VR = 2.4 V | Limited to single-rail clamping; unsuitable for differential or bidirectional protection | Select only when 2.4 V regulation and minimal footprint are primary constraints |
| PZM5.1NB,115 | Dual 5.1 V Zener in SOT-363; higher Ptot = 420 mW; 3.5 µA IR at VR = 5.1 V | Larger 2.2 mm × 1.35 mm package; better thermal performance but occupies 40% more board area | Prefer when surge energy exceeds 40 W or continuous power > 350 mW is required |
Compared with MMBZ5221BS-7-F and PZM5.1NB,115, the BZB784-C5V1-QX uniquely balances AEC-Q101 qualification, tight ±5% VZ tolerance, and compact SOT323 footprint - making it optimal for space-constrained automotive sensor nodes requiring matched dual-clamp behavior without thermal or leakage trade-offs.
Availability
BZB784-C5V1-QX is available at Aetrix Electronics and suitable for automotive sensor interface protection, USB-C ESD clamp designs, engine control unit reference stabilization, and industrial CAN transceiver biasing requiring stable component supply across extended temperature and high-reliability environments.
Supply support for BZB784-C5V1-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 Dutch semiconductor manufacturer specializing in high-performance, high-reliability discrete and logic devices, with core expertise in automotive-qualified components and advanced packaging technologies.
The BZB784-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for automotive voltage regulation and transient protection in harsh-environment electronic control units and sensor systems.
FAQ
What is the maximum non-repetitive peak reverse current for BZB784-C5V1-QX?
The BZB784-C5V1-QX supports a non-repetitive peak reverse current (IZSM) of 6.0 A under tp = 100 µs square-wave conditions at Tamb = 25 °C, as specified in Table 8 of the datasheet. This rating enables robust protection against ISO 7637-2 Pulse 1 and Pulse 2b transients in automotive power networks.
How does the common-anode configuration affect circuit implementation?
The common-anode (CA) pin requires connection to a stable reference point - typically a clean ground or regulated voltage rail - while K1 and K2 connect to protected signal lines. This configuration allows simultaneous clamping of two nodes to the same reference, enabling differential signal protection or redundant voltage referencing without cross-talk.
Is BZB784-C5V1-QX suitable for bidirectional ESD protection?
Yes - its dual-cathode, common-anode architecture provides symmetrical 5.1 V clamping in both polarities relative to the CA node. With 300 pF diode capacitance at 1 MHz and 2 µA leakage, it meets IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) requirements for bidirectional data-line protection in automotive infotainment and ADAS interfaces.
What is the thermal resistance from junction to solder point when only one diode is active?
When only one diode is conducting, Rth(j-sp) is 265 K/W (Table 6), measured at the cathode tab solder point. This value reflects heat transfer efficiency during single-diode surge events and informs PCB copper pour design - e.g., ≥ 25 mm² thermal pad recommended for sustained 200 mA forward current operation.
BZB784-C5V1-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):
- 5.1 V
- Tolerance:
- ±5%
- Power - Max:
- 180 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 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-C5V1-QX FAQ
1.How can I place an order for BZB784-C5V1-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BZB784-C5V1-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-C5V1-QX reliable?
The price and inventory of BZB784-C5V1-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-C5V1-QX is usually 5 days.
3.What payment methods are accepted for BZB784-C5V1-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZB784-C5V1-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZB784-C5V1-QX?
BZB784-C5V1-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZB784-C5V1-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-C5V1-QX?
For technical support, including BZB784-C5V1-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZB784-C5V1-QX requirements.
6.How does Aetrix verify that BZB784-C5V1-QX is sourced from the original manufacturer or authorized distributors?
All BZB784-C5V1-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-C5V1-QX meets industry standards.
7.What is the process for return or replacement of BZB784-C5V1-QX?
All BZB784-C5V1-QX units undergo pre-shipment inspection (PSI). If there is an issue with BZB784-C5V1-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-C5V1-QX part is unused and in its original packaging.
Return procedure for BZB784-C5V1-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZB784-C5V1-QX Tags
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MMBZ18VALT1G
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AZ23C18-7-F
Diodes Incorporated
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MMBZ33VALT1G
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