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Nexperia USA Inc. BZV49-C4V3,135
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- Part No.:
- BZV49-C4V3,135
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-243AA
- Datasheet:
-
BZV49-C4V3,135.pdf
- Description:
- DIODE ZENER 4.3V 1W SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
BZV49-C4V3,135 from Nexperia is a medium-power Zener voltage regulator diode in SOT89 package, designed for precision DC voltage reference and stabilization in low-to-medium power circuits. It delivers a nominal working voltage of 4.3 V (min 4.0 V, max 4.6 V) at 5 mA test current, with ±5% tolerance, 80–90 Ω differential resistance, and −3.5 to −2.5 mV/K temperature coefficient. Used in power supply feedback loops and voltage clamping for microcontroller I/O protection.
For engineers reviewing the BZV49-C4V3,135 datasheet, BZV49-C4V3,135 pinout, BZV49-C4V3,135 application, or BZV49-C4V3,135 equivalent, key selection criteria include Zener voltage accuracy at 5 mA, thermal resistance (125 K/W junction-to-ambient), non-repetitive peak reverse power capability (40 W), and SOT89 thermal pad layout compatibility with PCB copper pour.
Technical Context
This device operates as a reverse-biased Zener diode, maintaining stable regulation across its specified test current range (5 mA). Its differential resistance (80–90 Ω) and negative temperature coefficient (−3.5 to −2.5 mV/K) indicate predictable voltage drift over temperature-critical for analog reference stability in industrial sensors and power management IC feedback paths.
The SOT89 package integrates a large collector pad (Pin 3) for enhanced thermal conduction, enabling 1 W continuous power dissipation when mounted on a 2.5 cm² ceramic substrate. Non-repetitive surge handling (40 W, 100 μs square wave) supports transient suppression in DC-DC converter input stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.0–4.6 V at IZ = 5 mA - defines stable regulation window for 3.3 V/5 V rail monitoring and clamping |
| Differential Resistance (rdif) | 80–90 Ω - determines output impedance and load regulation sensitivity in shunt reference designs |
| Temperature Coefficient (SZ) | −3.5 to −2.5 mV/K - enables predictable voltage drift compensation in temperature-critical analog front-ends |
| Test Current (IZtest) | 5 mA - standard bias point for specification compliance; design must ensure minimum current for regulation |
| Max Power Dissipation (Ptot) | 1 W at Tamb = 25 °C - sets PCB copper area and thermal pad requirements for sustained operation |
| Non-repetitive Peak Power (PZSM) | 40 W for 100 μs - supports ESD/transient immunity in automotive body control modules and industrial IO protectors |
| Reverse Leakage (IR) | ≤3 μA at VR = 3 V - ensures low quiescent current in battery-powered sensor nodes |
Pinout & Package
SOT89 (SC-62) surface-mount plastic package with exposed collector pad (Pin 3) for thermal enhancement; 3-lead configuration optimized for high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connected to lower-potential node in reverse-bias regulation mode |
| 2 | Cathode | Zener breakdown terminal; tied to regulated voltage node and feedback path in switching regulators |
| 3 | Anode (thermal pad) | Electrically common with Pin 1; soldered to PCB copper pour for thermal conduction and mechanical anchoring |
Key Features
| Feature | Design Value |
|---|---|
| E24 ±5% voltage tolerance | Enables interchangeability across 37 BZV49-C variants without redesigning feedback dividers |
| 1 W continuous power rating | Supports direct shunt regulation in 5 V/100 mA power rails without external series resistor derating |
| Low 3 μA reverse leakage at 3 V | Minimizes standby current in always-on IoT sensor nodes powered by coin cells or energy harvesters |
| SOT89 thermal pad (Pin 3) | Reduces junction-to-board thermal resistance to ~15 K/W, improving reliability under pulsed load conditions |
| −3.5 to −2.5 mV/K tempco | Allows predictable offset correction in temperature-compensated voltage references using matched NTC networks |
Applications
| Power Supply Feedback Reference | Microcontroller I/O Clamping |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference providing precise 4.3 V threshold to TL431-like comparator circuitry. Use Value: Tight 4.0–4.6 V tolerance ensures <±2% output regulation across line/load/temperature in Class II AC-DC adapters. | Use Scenario: Protecting 3.3 V GPIO pins against 5 V bus transients in industrial PLC backplanes. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage excursion to ≤4.6 V during ESD events or hot-swap surges. Use Value: 40 W non-repetitive peak power rating absorbs 2 kV HBM ESD pulses without degradation. |
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
Use Scenario: Providing stable reference for LIN bus transceiver biasing in door module ECUs. IC Role / Device Role / Timing Role: Voltage reference for internal LDO enable threshold and wake-up detection circuitry. Use Value: −2.5 mV/K tempco aligns with silicon bandgap drift, minimizing reference error over −40 to +125 °C. | Use Scenario: Biasing bridge amplifier inputs in strain-gauge pressure transmitters. IC Role / Device Role / Timing Role: Precision shunt reference establishing common-mode voltage for instrumentation amplifiers. Use Value: 80–90 Ω differential resistance ensures <0.5% gain error contribution in 24-bit sigma-delta ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4V3T1G | Same 4.3 V nominal Zener voltage but SOD-123 package; 500 mW Ptot; higher rdif (100 Ω typical) | Limited to lower-power applications due to reduced thermal mass and no thermal pad | Select when board space is constrained and power dissipation remains <300 mW |
| BZX84-C4V3 | SOT23 package; 350 mW Ptot; wider VZ tolerance (±5% to ±10%); no thermal pad | Not suitable for >200 mW continuous dissipation or surge-prone environments | Choose only for cost-sensitive consumer electronics where thermal stress is negligible |
Compared with MMSZ4V3T1G and BZX84-C4V3, BZV49-C4V3,135 provides superior thermal performance (1 W rating + SOT89 pad), tighter regulation stability under load variation, and robust 40 W surge handling-making it the preferred choice for automotive and industrial power management where long-term reliability is critical.
Availability
BZV49-C4V3,135 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, power supply feedback references, and microcontroller I/O clamping requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for BZV49-C4V3,135 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 discrete semiconductors, formed in 2017 from the former NXP Standard Products division, with focus on automotive, industrial, and computing applications.
The BZV49 series belongs to Nexperia's voltage regulator diode product line, engineered for precision DC voltage stabilization in medium-power SMD applications where thermal robustness and tight tolerance are essential.
FAQ
What is the maximum continuous forward current for BZV49-C4V3,135?
The maximum continuous forward current is 250 mA, as specified in the Absolute Maximum Ratings table. This rating applies only when the device is operated in forward bias-however, in normal Zener regulation use, it functions in reverse bias, where the critical parameter is reverse test current (5 mA) and power dissipation limits (1 W).
Can BZV49-C4V3,135 be used as a replacement for BZX84-C4V3 in existing designs?
No direct drop-in replacement is possible due to package and thermal differences: BZV49-C4V3,135 uses SOT89 with thermal pad (Pin 3), while BZX84-C4V3 uses SOT23 with no thermal pad. PCB footprint, thermal relief, and power handling differ significantly-redesign of layout and thermal validation are required.
What is the significance of the "C" in BZV49-C4V3?
The "C" denotes the E24 series tolerance grade, indicating approximately ±5% Zener voltage tolerance at the specified test current. This distinguishes it from "A" (±1%) or "B" (±2%) grades in other Nexperia Zener families, targeting cost-optimized yet stable regulation in general-purpose applications.
How does the temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
With a typical temperature coefficient of −2.5 mV/K, the Zener voltage decreases by ~425 mV across this 170 K range. For a 4.3 V nominal voltage, that represents ~10% drift-so system-level compensation (e.g., series thermistor or digital calibration) is needed in high-accuracy applications beyond basic clamping or coarse feedback.
BZV49-C4V3,135 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):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 90 Ohms
- Current - Reverse Leakage @ Vr:
- 3 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-C4V3,135 FAQ
1.How can I place an order for BZV49-C4V3,135 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV49-C4V3,135 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-C4V3,135 reliable?
The price and inventory of BZV49-C4V3,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV49-C4V3,135 is usually 5 days.
3.What payment methods are accepted for BZV49-C4V3,135?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV49-C4V3,135 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV49-C4V3,135?
BZV49-C4V3,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV49-C4V3,135 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-C4V3,135?
For technical support, including BZV49-C4V3,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV49-C4V3,135 requirements.
6.How does Aetrix verify that BZV49-C4V3,135 is sourced from the original manufacturer or authorized distributors?
All BZV49-C4V3,135 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-C4V3,135 meets industry standards.
7.What is the process for return or replacement of BZV49-C4V3,135?
All BZV49-C4V3,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZV49-C4V3,135, 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-C4V3,135 part is unused and in its original packaging.
Return procedure for BZV49-C4V3,135:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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