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Nexperia USA Inc. BZV49-C18,115
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- Part No.:
- BZV49-C18,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-243AA
- Datasheet:
-
BZV49-C18,115.pdf
- Description:
- DIODE ZENER 18V 1W SOT89
- Quantity:
- Payment:
- Shipping:
Inventory:375
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Product details
Overview
BZV49-C18,115 from Nexperia is a medium-power Zener voltage regulator diode in SOT89 package, designed for precision DC voltage reference and stabilization in power supply rails. It delivers a nominal working voltage of 18 V at 5 mA test current, with ±5% tolerance, 10 Ω typical differential resistance, and −1.5 mV/K temperature coefficient. Used in industrial power monitoring circuits where stable 18 V biasing is required.
For engineers reviewing the BZV49-C18,115 datasheet, BZV49-C18,115 pinout, BZV49-C18,115 application, or BZV49-C18,115 equivalent, key selection criteria include Zener voltage accuracy at IZtest = 5 mA, thermal resistance (Rth(j-tp) = 15 K/W), non-repetitive peak reverse power capability (40 W), and SOT89 thermal pad layout compatibility.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining a stable 18 V output across its cathode-anode terminals under reverse-biased conditions. Its regulation relies on controlled Zener breakdown, with low dynamic impedance (10 Ω typ.) ensuring minimal voltage deviation under load transients.
Thermal design is critical: junction-to-tie-point resistance is 15 K/W when mounted on a 2.5 cm² ceramic substrate, enabling reliable 1 W continuous dissipation only with proper PCB copper pour under the exposed collector pad (Pin 3). The −1.5 mV/K temperature coefficient indicates slight negative drift over temperature, requiring compensation in high-precision references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 16.8 V to 19.1 V at IZtest = 5 mA - defines usable regulation window for 18 V nominal rail |
| Differential Resistance rdif | 10 Ω max at IZtest = 5 mA - determines output impedance and load regulation error |
| Temperature Coefficient SZ | −1.5 mV/K typ. - quantifies voltage drift per degree Celsius rise in junction temperature |
| Total Power Dissipation Ptot | 1 W at Tamb = 25 °C - sets maximum steady-state thermal budget without derating |
| Non-repetitive Peak Power PZSM | 40 W for tp = 100 μs - supports transient surge suppression in input protection stages |
| Reverse Current IR | ≤0.05 μA at VR = 13.5 V - ensures low leakage in standby or battery-backed circuits |
| Diode Capacitance Cd | 70 pF at f = 1 MHz, VR = 0 V - impacts high-frequency noise filtering and stability in feedback loops |
Pinout & Package
SOT89 (SC-62) plastic surface-mounted package with exposed collector pad (Pin 3) for enhanced thermal conduction. Dimensions: 4.6 × 2.6 × 1.6 mm; 3-lead configuration optimized for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Forward current entry point; connected to lower-potential node in regulation circuit |
| 2 | Cathode | Regulated output node; connected to load and voltage reference point |
| 3 | Anode (thermal pad) | Electrically tied to Pin 1; soldered to large copper area for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| E24 ±5% voltage tolerance | Enables precise binning for 18 V systems without custom calibration |
| 1 W continuous power rating | Supports regulation in mid-power supplies (e.g., 18 V @ 55 mA) with standard PCB layout |
| Low rdif (10 Ω typ.) | Maintains <±0.1 V output variation across 1–10 mA load current changes |
| Exposed thermal pad (Pin 3) | Reduces Rth(j-tp) to 15 K/W - critical for sustained 1 W operation in compact designs |
| Non-repetitive 40 W surge rating | Withstands IEC 61000-4-5 level 3 surges when used in front-end clamp networks |
Applications
| Industrial Power Monitoring | Automotive Body Control Module |
|---|---|
Use Scenario: Monitoring 24 V vehicle battery voltage via resistive divider into ADC input. IC Role / Device Role / Timing Role: Zener reference providing stable 18 V rail for ADC reference buffer and signal conditioning op-amps. Use Value: Ensures <±0.5% measurement accuracy over −40 °C to +125 °C ambient, leveraging tight VZ tolerance and known SZ. | Use Scenario: Regulating auxiliary 18 V supply for microcontroller peripherals in BCM. IC Role / Device Role / Timing Role: Shunt regulator stabilizing LDO input rail during load dump events. Use Value: Absorbs up to 40 W transient energy (100 μs) without failure, protecting downstream regulators. |
| Programmable Logic Controller I/O | Medical Diagnostic Sensor Interface |
Use Scenario: Providing isolated 18 V bias for optocoupler input stages in PLC digital inputs. IC Role / Device Role / Timing Role: Voltage clamp defining logic threshold and limiting input surge energy. Use Value: Low 70 pF capacitance prevents signal edge degradation in 10 kHz switching applications. | Use Scenario: Generating calibrated 18 V reference for photodiode transimpedance amplifier bias. IC Role / Device Role / Timing Role: Precision shunt reference with <0.05 μA leakage at 13.5 V reverse bias. Use Value: Enables sub-nA dark-current measurement accuracy by minimizing reference-induced leakage paths. |
Availability
BZV49-C18,115 is available at Aetrix Electronics and suitable for industrial power monitoring, automotive body control modules, and programmable logic controller I/O requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BZV49-C18,115 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 discrete, logic, and PowerMOS semiconductors, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.
The BZV49 series belongs to Nexperia's voltage regulator diode product line, engineered for robust DC voltage stabilization in cost-sensitive, thermally constrained power supply and protection circuits.
FAQ
What is the maximum continuous reverse current the BZV49-C18,115 can sustain at 25 °C?
The device does not specify a maximum continuous reverse current rating. Instead, it is rated for 1 W total power dissipation at 25 °C ambient. At nominal 18 V Zener voltage, this corresponds to approximately 55 mA continuous reverse current (P = V × I). Operation above this requires thermal derating per the Rth(j-a) = 125 K/W curve.
Can BZV49-C18,115 be used in place of a BZX84-C18 in a SOT23 footprint?
No - BZV49-C18,115 uses SOT89 (3-lead, thermal pad) while BZX84-C18 uses SOT23 (3-lead, no thermal pad). Pinout differs: SOT89 Pins 1/2/3 are anode/cathode/anode; SOT23 Pins 1/2/3 are anode/cathode/no-connect. Mechanical and thermal incompatibility makes direct substitution impossible without PCB redesign.
What is the significance of the "115" suffix in BZV49-C18,115?
The "115" is Nexperia's internal ordering code denoting tape-and-reel packaging: 1000 pieces per reel, 12 mm tape width, and RoHS-compliant finish. It does not affect electrical specifications - all BZV49-C18 variants share identical Zener voltage, power, and thermal characteristics.
How does the −1.5 mV/K temperature coefficient impact long-term voltage stability?
A −1.5 mV/K coefficient means the Zener voltage decreases by ~1.5 mV per Kelvin rise in junction temperature. Over a 100 K range (−40 °C to +60 °C ambient, assuming ΔTj ≈ ΔTamb), VZ shifts by ~150 mV - approximately ±0.8% of 18 V. This must be accounted for in high-accuracy references via calibration or complementary circuitry.
BZV49-C18,115 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):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.6 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-C18,115 FAQ
1.How can I place an order for BZV49-C18,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV49-C18,115 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-C18,115 reliable?
The price and inventory of BZV49-C18,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV49-C18,115 is usually 5 days.
3.What payment methods are accepted for BZV49-C18,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV49-C18,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV49-C18,115?
BZV49-C18,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV49-C18,115 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-C18,115?
For technical support, including BZV49-C18,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV49-C18,115 requirements.
6.How does Aetrix verify that BZV49-C18,115 is sourced from the original manufacturer or authorized distributors?
All BZV49-C18,115 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-C18,115 meets industry standards.
7.What is the process for return or replacement of BZV49-C18,115?
All BZV49-C18,115 units undergo pre-shipment inspection (PSI). If there is an issue with BZV49-C18,115, 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-C18,115 part is unused and in its original packaging.
Return procedure for BZV49-C18,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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