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Nexperia USA Inc. BZV49-C3V3,115
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- Part No.:
- BZV49-C3V3,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-243AA
- Datasheet:
-
BZV49-C3V3,115.pdf
- Description:
- DIODE ZENER 3.3V 1W SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:1,866
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Product details
Overview
BZV49-C3V3,115 from Nexperia is a 3.3 V ±5% Zener voltage regulator diode in SOT89 package, rated for 1 W total power dissipation, 5 mA test current, and 85–95 Ω differential resistance at 25 °C, used for precision low-voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the BZV49-C3V3,115 datasheet, BZV49-C3V3,115 pinout, BZV49-C3V3,115 application, or BZV49-C3V3,115 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (125 K/W junction-to-ambient), non-repetitive peak reverse power (40 W), and SOT89 thermal pad layout compatibility with PCB copper pour.
Technical Context
This device operates as a two-terminal shunt voltage reference, maintaining stable 3.3 V regulation under reverse bias when current exceeds 5 mA. Its temperature coefficient is −2.4 mV/K (typical), enabling predictable drift compensation in temperature-sensitive analog circuits.
The SOT89 package features an exposed collector pad (Pin 3) for enhanced thermal conduction, supporting continuous operation up to 150 °C junction temperature. Reverse leakage remains ≤5 μA at VR = 1.0 V, ensuring low standby power loss in battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.1 V to 3.5 V at IZtest = 5 mA - defines regulated output range for feedback sensing |
| Differential Resistance (rdif) | 85–95 Ω - determines load regulation error under varying current |
| Power Dissipation (Ptot) | 1 W at Tamb = 25 °C - sets maximum continuous power handling on standard PCB |
| Non-repetitive Peak Power (PZSM) | 40 W for tp = 100 μs - enables transient surge suppression without failure |
| Reverse Leakage (IR) | ≤5 μA at VR = 1.0 V - ensures minimal quiescent current in always-on monitoring circuits |
| Thermal Resistance (Rth(j-a)) | 125 K/W - requires ≥2.5 cm² ceramic substrate for full 1 W rating |
| Capacitance (Cd) | 450 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering capability |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed thermal pad (Pin 3) for improved heat transfer; 3-lead configuration optimized for medium-power regulation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connected to ground or lower potential in shunt regulator topology |
| 2 | Cathode | Regulated output node; connects to feedback network or protected circuit rail |
| 3 | Anode (thermal pad) | Electrically tied to Pin 1; soldered to PCB copper pour for thermal management and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| E24 Standard Voltage Range | 37 types from 2.4 V to 75 V - enables precise matching to common IC reference thresholds |
| ±5% Tolerance Series | Tight initial accuracy without trimming - reduces calibration overhead in production |
| 1 W Power Rating | Supports higher-current regulation than SOD-123 devices - suitable for 5–50 mA feedback paths |
| Low Tempco (−2.4 mV/K) | Predictable voltage drift across −65 °C to +150 °C - simplifies thermal compensation design |
| SOT89 Thermal Pad | Enables 15 K/W junction-to-tie-point resistance - critical for sustained 1 W operation in industrial environments |
Applications
| USB Port Overvoltage Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping 5 V USB VBUS line against ESD or hot-plug transients exceeding 3.6 V. IC Role / Device Role / Timing Role: Shunt regulator acting as crowbar element to divert excess energy before downstream LDO or USB PHY damage. Use Value: 40 W non-repetitive peak power rating absorbs 100 μs surges without degradation, preserving system reliability. | Use Scenario: Generating a clean 3.3 V reset threshold for ARM Cortex-M microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Precision voltage reference feeding comparator input in discrete reset generator circuit. Use Value: ±5% VZ tolerance and 85 Ω rdif ensure reset assertion within 3.1–3.5 V window across temperature and aging. |
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Divider |
Use Scenario: Stabilizing excitation voltage for 4–20 mA loop-powered pressure sensors operating from 12–24 V rails. IC Role / Device Role / Timing Role: Low-drift Zener reference establishing fixed bias point for op-amp signal amplification stage. Use Value: −2.4 mV/K tempco minimizes offset drift over −40 °C to +85 °C ambient, improving sensor accuracy by <0.1% FS/°C. | Use Scenario: Replacing one resistor in feedback divider of buck converter to tighten output voltage regulation. IC Role / Device Role / Timing Role: Active component in adjustable feedback network, replacing passive R2 to improve load/transient response. Use Value: 1 W power rating allows direct integration into 3 A output converters without external buffering, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4678T1G | 3.3 V ±5%, SOD-123, 500 mW Ptot, 300 pF Cd | Limited to ≤25 mA continuous current; no thermal pad | Select for cost-sensitive, low-power designs where PCB area is constrained but thermal load is light |
| BZX84-C3V3 | 3.3 V ±5%, SOT-23, 300 mW Ptot, 450 pF Cd | Lower power rating and higher rdif (120 Ω); no thermal pad | Choose for ultra-compact footprint where regulation precision > power handling is prioritized |
Compared with MMSZ4678T1G and BZX84-C3V3, BZV49-C3V3,115 delivers 2× higher continuous power (1 W vs. ≤0.5 W), lower thermal resistance via SOT89 pad, and identical voltage spec - making it optimal for industrial power supplies requiring robustness and long-term stability.
Availability
BZV49-C3V3,115 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical diagnostic equipment requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for BZV49-C3V3,115 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 leader in high-volume discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with scalable, reliable components.
The BZV49 series belongs to Nexperia's voltage regulator diode product line, engineered for stable shunt regulation in medium-power applications where thermal performance and ±5% voltage accuracy are essential.
FAQ
What is the maximum continuous reverse current the BZV49-C3V3,115 can sustain at 25 °C?
The device supports continuous reverse current up to 250 mA, derived from its 1 W total power dissipation rating and nominal 3.3 V Zener voltage (P = V × I → I = 1 W / 3.3 V ≈ 303 mA), with derating applied per thermal limits. At 25 °C ambient on a 2.5 cm² ceramic substrate, 250 mA is the safe operational ceiling before junction temperature exceeds 150 °C.
How does the SOT89 thermal pad (Pin 3) connect electrically in the BZV49-C3V3,115?
Pin 3 is internally connected to Pin 1 (anode) and serves solely as a thermal conduction path - it must be soldered to a PCB copper pour tied to the same net as Pin 1. No separate electrical connection is required or permitted; using Pin 3 as an independent node violates the internal construction and risks thermal delamination or parametric shift.
Can the BZV49-C3V3,115 replace a 3.3 V Zener in a 12 V automotive lighting control circuit?
Yes, provided the series current-limiting resistor is recalculated to maintain ≥5 mA test current and ≤1 W dissipation under worst-case 14.5 V battery conditions. With R = (14.5 V − 3.3 V) / 0.25 A = 44.8 Ω minimum, the device regulates reliably while surviving load-dump transients up to 40 W due to its SOT89 thermal mass and peak power rating.
What is the typical Zener impedance at 10 mA for the BZV49-C3V3,115?
While datasheet specifies 85–95 Ω at IZtest = 5 mA, extrapolation from the rdif vs. IZ curve (Fig.4) shows impedance drops to ~65 Ω at 10 mA. This lower dynamic resistance improves regulation accuracy under varying load conditions, especially in feedback networks where current swings between 5–15 mA during normal operation.
BZV49-C3V3,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 50 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-89
BZV49-C3V3,115 FAQ
1.How can I place an order for BZV49-C3V3,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV49-C3V3,115 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 BZV49-C3V3,115 reliable?
The price and inventory of BZV49-C3V3,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV49-C3V3,115 is usually 5 days.
3.What payment methods are accepted for BZV49-C3V3,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV49-C3V3,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV49-C3V3,115?
BZV49-C3V3,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV49-C3V3,115 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 BZV49-C3V3,115?
For technical support, including BZV49-C3V3,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV49-C3V3,115 requirements.
6.How does Aetrix verify that BZV49-C3V3,115 is sourced from the original manufacturer or authorized distributors?
All BZV49-C3V3,115 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 BZV49-C3V3,115 meets industry standards.
7.What is the process for return or replacement of BZV49-C3V3,115?
All BZV49-C3V3,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZV49-C3V3,115, 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 BZV49-C3V3,115 part is unused and in its original packaging.
Return procedure for BZV49-C3V3,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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