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Nexperia USA Inc. BZV85-C18,133
- Part No.:
- BZV85-C18,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
BZV85-C18,133.pdf
- Description:
- DIODE ZENER 18V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
BZV85-C18,133 from Nexperia is a medium-power Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 18 V nominal working voltage with ±5 % tolerance, 1.3 W total power dissipation at 25 °C ambient, and 60 W non-repetitive peak reverse power handling - used for precision DC voltage stabilization in low-to-medium power linear power supplies and reference circuits.
For engineers reviewing the BZV85-C18,133 datasheet, BZV85-C18,133 pinout, BZV85-C18,133 application, or BZV85-C18,133 equivalent, this part supports stable regulation under transient surges up to 100 µs, offers 12.5 Ω typical differential resistance at 5 mA test current, and maintains thermal stability with junction-to-tie-point resistance of 110 K/W - critical for compact PCB-mounted designs requiring predictable Zener impedance and temperature coefficient.
Technical Context
This Zener diode operates in reverse breakdown mode to clamp and regulate voltage across load circuits, with its 18 V nominal Zener voltage (VZ) specified at 5 mA test current (Itest). Its negative temperature coefficient of −1.8 mV/K below 5 V and positive +11.8 mV/K at 18 V enables predictable drift compensation in multi-diode references.
The device exhibits 12.5 Ω typical differential resistance (rdif) at Itest, 1.0 pF diode capacitance at 1 MHz and 0 V reverse bias, and 0.05 µA maximum reverse leakage (IR) at 14.4 V - confirming suitability for low-noise analog references and low-current bias networks where dynamic impedance and parasitic capacitance directly impact loop stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 18 V (min 16.8 V, max 19.1 V at 5 mA - defines regulated output level in shunt configuration) |
| Differential Resistance | 12.5 Ω (typical at 5 mA - determines regulation error under load current variation) |
| Temperature Coefficient | +11.8 mV/K (at 5 mA - quantifies VZ drift per °C, enabling thermal error budgeting) |
| Total Power Dissipation | 1.3 W (max at Tamb = 25 °C with 10 mm lead length - sets continuous thermal limit on PCB) |
| Non-repetitive Peak Power | 60 W (for 100 µs square wave - supports surge suppression in input-stage protection) |
| Reverse Leakage Current | 0.05 µA max at 14.4 V - ensures minimal quiescent error in high-impedance reference nodes) |
| Forward Voltage | 1.0 V max at 50 mA - defines forward conduction threshold during polarity-reversal fault conditions) |
Pinout & Package
Hermetically sealed axial-leaded SOD66 (DO-41) glass package with 2.6 mm body diameter, 25.4 mm overall length, and cathode indicated by a single black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (unbanded end) | Anode | Connected to circuit ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| E24-standardized voltage grading | 18 V nominal with ±5 % tolerance - enables direct replacement in legacy 18 V reference designs without recalibration |
| Hermetic glass encapsulation | Guarantees long-term parameter stability and moisture resistance - critical for industrial environments with thermal cycling |
| Low differential resistance | 12.5 Ω typical at 5 mA - minimizes output voltage deviation under ±1 mA load current shifts |
| Controlled temperature coefficient | +11.8 mV/K at 18 V - allows predictable thermal drift modeling in precision voltage references |
| High surge robustness | 60 W non-repetitive peak power at 100 µs - absorbs ESD and line-transient energy without degradation |
Applications
| Linear Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in discrete 78xx-style linear regulators or op-amp-based adjustable supplies. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 18 V reference point for error amplifier comparison. Use Value: Maintains ±0.9 V regulation window over 0–50 mA load range due to 12.5 Ω rdif, reducing output ripple sensitivity. |
Use Scenario: Clamping transient spikes on 15 V logic rails or sensor supply lines exposed to inductive kickback. IC Role / Device Role / Timing Role: Passive overvoltage limiter diverting excess current when rail exceeds 18 V + tolerance. Use Value: Absorbs 60 W for 100 µs without failure, limiting spike amplitude to ≤19.1 V and protecting downstream CMOS inputs. |
| Current Source Bias Network | Analog Sensor Excitation |
|
Use Scenario: Setting bias current for JFET or bipolar transistor amplifiers via constant-voltage drop across series resistor. IC Role / Device Role / Timing Role: Stable voltage reference establishing precise Ibias = (VZ − VBE)/R in emitter-degenerated stages. Use Value: 0.05 µA max reverse leakage ensures <1 nA error contribution in picoampere-level bias circuits. |
Use Scenario: Providing excitation voltage for resistive bridge sensors (e.g., strain gauges) requiring stable 18 V supply. IC Role / Device Role / Timing Role: Low-noise DC reference source delivering regulated voltage independent of supply ripple. Use Value: 1.0 pF capacitance and <1 mV RMS noise ensure minimal AC coupling into high-gain instrumentation amplifier front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A | 18 V nominal, ±5 %, 1.0 W Ptot, 15 Ω rdif - lower power rating and higher impedance than BZV85-C18,133 | Suitable only for <1 W continuous dissipation; less stable under thermal cycling due to plastic package | Select when cost-sensitive, low-power, non-hermetic designs suffice and surge immunity is not required |
| BZX85C18 | 18 V nominal, ±5 %, 1.3 W Ptot, but 20 Ω rdif and +13.5 mV/K tempco - higher impedance and drift vs. BZV85-C18,133 | Acceptable for general-purpose clamping but marginal for precision references demanding low rdif | Select only if BZV85-C18,133 is unavailable; expect ~0.5 % additional regulation error over 50 °C range |
Compared with 1N4746A and BZX85C18, BZV85-C18,133 delivers superior thermal stability (+11.8 mV/K vs. +13.5 mV/K), lower dynamic impedance (12.5 Ω vs. 15–20 Ω), and hermetic reliability - making it preferred for industrial-grade references where long-term drift and surge resilience are design-critical.
Availability
BZV85-C18,133 is available at Aetrix Electronics and suitable for linear power supply references, overvoltage protection clamps, and analog sensor excitation circuits requiring stable component supply and traceable sourcing.
Supply support for BZV85-C18,133 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 essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for efficiency, reliability, and manufacturability.
The BZV85 series belongs to Nexperia's precision Zener regulator portfolio, engineered for stable DC voltage reference and transient suppression in industrial, automotive, and consumer power systems where hermetic integrity and tight parametric control are mandatory.
FAQ
What is the maximum continuous power dissipation for BZV85-C18,133 at 25 °C ambient?
The maximum continuous total power dissipation is 1.3 W when mounted on a PCB with 10 mm lead length and 1 cm² copper area per lead. This rating drops linearly above 25 °C ambient per the 175 K/W junction-to-ambient thermal resistance - derating to 0.8 W at 70 °C ambient.
How does the temperature coefficient of BZV85-C18,133 affect voltage regulation accuracy?
With a +11.8 mV/K temperature coefficient at 5 mA test current, the Zener voltage increases by approximately 0.59 V over a 50 °C operating range (25–75 °C). This must be included in system-level error budgets for precision references, especially when paired with components having opposing thermal drift.
Can BZV85-C18,133 be used in parallel for higher current handling?
No - Zener diodes exhibit manufacturing spread in VZ and rdif, causing current hogging and thermal runaway when paralleled. For higher current, use a single higher-power Zener or an active shunt regulator with current-sharing transistors.
What is the significance of the "C" in BZV85-C18,133?
The "C" denotes the E24 tolerance series (±5 %), distinguishing it from "A" (±1 %) or "B" (±2 %) variants. It confirms the device meets the 16.8–19.1 V VZ range at 5 mA, aligning with standard 18 V reference requirements in cost-sensitive industrial designs.
BZV85-C18,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 18 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 20 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 12.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 50 mA
- Operating Temperature:
- 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
BZV85-C18,133 FAQ
1.How can I place an order for BZV85-C18,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for BZV85-C18,133 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 BZV85-C18,133 reliable?
The price and inventory of BZV85-C18,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV85-C18,133 is usually 5 days.
3.What payment methods are accepted for BZV85-C18,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV85-C18,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZV85-C18,133?
BZV85-C18,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZV85-C18,133 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 BZV85-C18,133?
For technical support, including BZV85-C18,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV85-C18,133 requirements.
6.How does Aetrix verify that BZV85-C18,133 is sourced from the original manufacturer or authorized distributors?
All BZV85-C18,133 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 BZV85-C18,133 meets industry standards.
7.What is the process for return or replacement of BZV85-C18,133?
All BZV85-C18,133 units undergo pre-shipment inspection (PSI). If there is an issue with BZV85-C18,133, 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 BZV85-C18,133 part is unused and in its original packaging.
Return procedure for BZV85-C18,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZV85-C18,133 Tags
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