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Nexperia USA Inc. BZX84-C7V5/DG/B3,2
- Part No.:
- BZX84-C7V5/DG/B3,2
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84-C7V5/DG/B3,2.pdf
- Description:
- DIODE ZENER 7.45V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,808
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Product details
Overview
BZX84-C7V5/DG/B3,2 from Nexperia is a 7.5 V ±5% Zener diode in SOT-23 package with 300 mW power dissipation, 5 µA maximum leakage at 5.7 V, and 15 Ω dynamic impedance at 5 mA, used for voltage regulation and overvoltage protection in low-power sensor interfaces and microcontroller I/O clamping circuits.
For engineers reviewing the BZX84-C7V5/DG/B3,2 datasheet, BZX84-C7V5/DG/B3,2 pinout, BZX84-C7V5/DG/B3,2 application, or BZX84-C7V5/DG/B3,2 equivalent, key selection criteria include Zener voltage tolerance, power rating under pulsed vs. DC conditions, thermal resistance in PCB layout, and leakage current impact on high-impedance bias networks.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage across its terminals. It is characterized at test current of 5 mA with specified Zener voltage (7.5 V), tolerance (±5%), and dynamic impedance (15 Ω).
Designed for surface-mount use in space-constrained applications, it features a maximum forward voltage of 0.9 V at 10 mA and a junction-to-ambient thermal resistance of 400 K/W in standard FR-4 PCB layout with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 7.5 V ±5% - defines clamping threshold for 3.3 V/5 V rail protection |
| Power Dissipation | 300 mW - limits continuous current to ~40 mA at 7.5 V without heatsinking |
| Dynamic Impedance | 15 Ω at 5 mA - determines output voltage variation under load changes |
| Reverse Leakage | ≤5 µA at 5.7 V - avoids significant error in high-Z voltage divider biasing |
| Forward Voltage | 0.9 V max at 10 mA - ensures predictable turn-on behavior in bidirectional ESD clamp configurations |
| Thermal Resistance | 400 K/W - requires careful copper pour design to avoid derating above 25°C ambient |
Pinout & Package
Package: SOT-23 (TO-236AB), 3-terminal plastic surface-mount package with standard pin assignment: Anode (Pin 1), Cathode (Pin 2), and unused terminal (Pin 3) - Pin 3 is internally unconnected and electrically isolated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| Pin 2 | Cathode | Connected to higher-potential node; defines Zener voltage drop direction |
| Pin 3 | No Connect | Internally isolated; must not be soldered or tied to any net |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±5% at 5 mA enables accurate 7.5 V reference without post-calibration |
| Low dynamic impedance | 15 Ω maintains <100 mV output shift under ±1 mA load variation |
| Controlled leakage current | ≤5 µA at 5.7 V prevents >1 kΩ effective parallel resistance in 1 MΩ bias networks |
| SOT-23 footprint compatibility | Matches JEDEC TO-236AB standard for automated placement and reflow |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
Use Scenario: Clamping analog sensor output (e.g., 0–10 V pressure transducer) to prevent MCU ADC input overload. IC Role / Device Role / Timing Role: Zener diode acts as passive voltage limiter between sensor output and MCU analog input pin. Use Value: Limits voltage to ≤7.5 V while drawing <5 µA leakage, preserving signal integrity without loading source. | Use Scenario: Protecting 3.3 V GPIO pins against ESD and transient overvoltage from external connectors. IC Role / Device Role / Timing Role: Bidirectional clamp formed with series resistor and BZX84-C7V5/DG/B3,2 to ground. Use Value: Activates at 7.5 V to shunt transients, with low leakage ensuring no false triggering during normal 0–3.3 V operation. |
| Low-Power Reference Supply | USB Port Overvoltage Detection |
Use Scenario: Generating stable 7.5 V reference for comparator thresholds in battery-powered monitoring systems. IC Role / Device Role / Timing Role: Zener diode biased at 5 mA to provide regulated reference node. Use Value: Delivers ±5% accuracy with 15 Ω impedance, enabling 1% threshold stability under 100 µA load variation. | Use Scenario: Detecting USB VBUS overvoltage (>6.5 V) in host-side protection circuitry before enabling power switches. IC Role / Device Role / Timing Role: Zener-based voltage monitor feeding comparator input to trigger shutdown logic. Use Value: 7.5 V Zener threshold provides 1 V margin above nominal 5 V USB spec, with tight tolerance minimizing false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5236BS-7-F | 7.5 V ±5%, 225 mW, 30 Ω Zzt at 20 mA | Higher dynamic impedance reduces regulation precision under varying loads | Preferred where lower cost outweighs tighter regulation needs |
| BZX84-C7V5,215 | Identical Zener voltage and tolerance, but 350 mW rating and different SOT-23 variant marking | Same functional role; higher power allows brief surge handling | Select when board-level thermal margin permits higher dissipation |
Compared with BZX84-C7V5/DG/B3,2, MMBZ5236BS-7-F trades regulation accuracy for cost, while BZX84-C7V5,215 offers identical electrical performance with enhanced thermal capability-making it suitable for designs requiring margin against short-duration overloads.
Availability
BZX84-C7V5/DG/B3,2 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O protection, and low-power reference supply designs requiring stable component supply and consistent parametric performance across production batches.
Supply support for BZX84-C7V5/DG/B3,2 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 high-volume, high-reliability discrete and logic devices, headquartered in Nijmegen, Netherlands.
This part belongs to Nexperia's BZX84 family of Zener diodes, engineered for precision voltage regulation and transient suppression in compact, cost-sensitive consumer and industrial electronics.
FAQ
What is the maximum continuous reverse current for reliable Zener operation?
The BZX84-C7V5/DG/B3,2 supports up to 40 mA continuous reverse current at 25°C ambient, derived from its 300 mW power rating and 7.5 V Zener voltage. Derating is required above 25°C per the 400 K/W thermal resistance; at 70°C ambient, maximum current drops to ~25 mA to stay within safe junction temperature limits.
Can this Zener diode be used in bidirectional ESD protection?
Yes, when paired with a series current-limiting resistor and grounded cathode, BZX84-C7V5/DG/B3,2 forms an effective unidirectional clamp. For true bidirectional protection, it must be combined with a second Zener (anode-to-ground) or used in a dedicated TVS array-this device alone conducts only in reverse breakdown and forward conduction (0.9 V).
How does the 15 Ω dynamic impedance affect voltage regulation accuracy?
A 15 Ω dynamic impedance means that a ±1 mA change in Zener current causes ±15 mV shift in output voltage. In a 5 mA bias configuration, this results in ±0.3% regulation error across typical load variations-sufficient for non-critical references but insufficient for precision ADC references without additional filtering or buffering.
Is Pin 3 electrically connected internally?
No, Pin 3 is an unused terminal with no internal connection to the die or bonding wires. It is mechanically present for package symmetry and pick-and-place compatibility but must remain unconnected in the PCB layout to avoid unintended parasitic coupling or solder bridging risks.
BZX84-C7V5/DG/B3,2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 7.45 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 5 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BZX84-C7V5/DG/B3,2 FAQ
1.How can I place an order for BZX84-C7V5/DG/B3,2 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84-C7V5/DG/B3,2 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 BZX84-C7V5/DG/B3,2 reliable?
The price and inventory of BZX84-C7V5/DG/B3,2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84-C7V5/DG/B3,2 is usually 5 days.
3.What payment methods are accepted for BZX84-C7V5/DG/B3,2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84-C7V5/DG/B3,2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84-C7V5/DG/B3,2?
BZX84-C7V5/DG/B3,2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84-C7V5/DG/B3,2 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 BZX84-C7V5/DG/B3,2?
For technical support, including BZX84-C7V5/DG/B3,2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84-C7V5/DG/B3,2 requirements.
6.How does Aetrix verify that BZX84-C7V5/DG/B3,2 is sourced from the original manufacturer or authorized distributors?
All BZX84-C7V5/DG/B3,2 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 BZX84-C7V5/DG/B3,2 meets industry standards.
7.What is the process for return or replacement of BZX84-C7V5/DG/B3,2?
All BZX84-C7V5/DG/B3,2 units undergo pre-shipment inspection (PSI). If there is an issue with BZX84-C7V5/DG/B3,2, 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 BZX84-C7V5/DG/B3,2 part is unused and in its original packaging.
Return procedure for BZX84-C7V5/DG/B3,2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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