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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Nexperia USA Inc. BZV55-C18,135

Name: BZV55-C18,135
Brand: Nexperia USA Inc.
SKU: BZV55-C18,135
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZV55-C18,135

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: DO-213AC, MINI-MELF, SOD-80

Datasheet:: BZV55-C18,135.pdf

Description:: DIODE ZENER 18V 500MW LLDS

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BZV55-C18,135 from Nexperia is a ±5 % tolerance silicon Zener diode in a hermetically sealed SOD80C glass SMD package, rated for 18 V nominal Zener voltage at 5 mA, 70 Ω typical differential resistance, and 500 mW total power dissipation. It serves as a precision low-power voltage reference or shunt regulator in bias networks, overvoltage protection clamps, and analog signal conditioning circuits.

For engineers reviewing the BZV55-C18,135 datasheet, BZV55-C18,135 pinout, BZV55-C18,135 application, or BZV55-C18,135 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (300 K/W to solder point), non-repetitive surge capability (40 W @ 100 µs), reverse leakage (<50 nA @ 12.6 V), and SOD80C footprint compatibility with reflow soldering.

Technical Context

This Zener diode operates in reverse breakdown mode with a temperature coefficient of +12.4 mV/K at 5 mA, indicating positive voltage drift with junction temperature rise-critical for stable biasing in temperature-varying environments. Its low 70 Ω differential resistance ensures minimal output voltage variation under load current changes up to 250 mA DC forward current rating.

The device uses a small hermetically sealed glass SOD80C package (3.3–3.7 mm length, 1.45–1.60 mm width, 0.3 mm height) optimized for surface-mount reliability and thermal transfer to PCB copper. Junction-to-solder-point thermal resistance is 300 K/W, enabling operation up to +200 °C storage temperature while maintaining regulation integrity under transient surges.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	16.8 V to 19.1 V at I_Z = 5 mA - defines regulated output range for precision reference use
Differential Resistance (r_dif)	70 Ω typ. - determines output impedance and load regulation error (ΔV_Z ≈ I_load × r_dif)
Temperature Coefficient (S_Z)	+12.4 mV/K - quantifies voltage drift per degree Celsius; requires thermal compensation in high-stability designs
Total Power Dissipation (P_tot)	500 mW at T_amb ≤ 50 °C on ceramic substrate - sets maximum continuous DC power handling
Non-repetitive Peak Power (P_ZSM)	40 W @ 100 µs square wave - enables short-duration overvoltage clamping without failure
Reverse Leakage Current (I_R)	<50 nA @ V_R = 12.6 V - ensures minimal quiescent current in high-impedance reference nodes
Forward Voltage (V_F)	≤0.9 V @ I_F = 10 mA - supports use as low-drop rectifier or ESD clamp in dual-role circuits

Pinout & Package

Hermetically sealed glass SOD80C surface-mount package: 3.3–3.7 mm length, 1.45–1.60 mm width, 0.3 mm height; cathode indicated by marking band.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; reverse-biased during Zener operation; marking band identifies this terminal
2	Anode	Connected to circuit ground or lower-potential rail; completes reverse-bias path for regulation

Key Features

Feature	Design Value
±5 % Zener voltage tolerance	Enables cost-effective voltage referencing where tight regulation is not required, e.g., power supply feedback dividers
Hermetically sealed glass construction	Ensures long-term parameter stability and moisture resistance in humid or harsh ambient conditions
Low 70 Ω differential resistance	Minimizes output voltage shift under varying load currents-critical for analog sensor biasing
40 W non-repetitive surge rating	Provides robust transient overvoltage protection without external TVS devices in space-constrained designs
SOD80C footprint compatibility	Supports automated placement and reflow soldering per IPC-7351 standards; matches industry-standard 0805 land patterns

Applications

Power Supply Feedback Regulation

Microcontroller Reset Circuitry

Use Scenario: Stabilizing feedback voltage in isolated flyback or buck converter secondary-side regulation loops.

IC Role / Device Role / Timing Role: Shunt reference providing precise 18 V reference to optocoupler input or TL431 control pin.

Use Value: Maintains ±1.5 % output voltage accuracy across line/load variations due to low r_dif and stable V_Z tolerance.

Use Scenario: Generating a clean, temperature-compensated reset threshold for 3.3 V or 5 V microcontrollers.

IC Role / Device Role / Timing Role: Zener-clamped voltage divider setting brown-out detection level at MCU reset pin.

Use Value: Delivers sub-100 nA leakage and +12.4 mV/K drift-enabling predictable reset timing across −40 °C to +85 °C.

Analog Sensor Biasing

ESD Protection Clamp

Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in industrial transmitters.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference sourcing constant current through sensor element.

Use Value: 70 Ω r_dif and 500 mW P_tot ensure <0.5 % bias voltage error despite sensor current fluctuations.

Use Scenario: Protecting low-voltage analog inputs (e.g., ADC front-ends, op-amp rails) from electrostatic discharge events.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp diverting ESD current away from sensitive IC pins during IEC 61000-4-2 events.

Use Value: 40 W P_ZSM rating absorbs 8 kV contact discharge energy without degradation when placed near connector entry points.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMBZ5245B-7-F (Diodes Inc.)	Same 18 V nominal, ±5 %, but in SOT-23 package; higher r_dif (100 Ω typ.), lower P_ZSM (25 W)	Larger thermal resistance (400 K/W j-a) limits power handling in compact layouts	Select when SOT-23 board space is constrained and peak surge immunity is secondary
BZX84-C18 (Nexperia)	Same 18 V, ±5 %, but in SOT-23; 150 mW P_tot, 100 Ω r_dif, no specified P_ZSM	Not suitable for surge clamping or >100 mA regulation loads due to lower power rating	Prefer for ultra-low-power biasing where 500 mW headroom is unnecessary

Compared with MMBZ5245B-7-F and BZX84-C18, BZV55-C18,135 offers superior surge resilience (40 W vs. 25 W/none) and lower dynamic impedance (70 Ω vs. 100 Ω), making it optimal for industrial power regulation and transient protection where SOD80C mounting is acceptable.

Availability

BZV55-C18,135 is available at Aetrix Electronics and suitable for power supply feedback regulation, microcontroller reset circuitry, analog sensor biasing, and ESD protection clamp applications requiring stable component supply and traceable sourcing.

Supply support for BZV55-C18,135 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 semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZV55 series belongs to Nexperia's precision Zener diode product line, engineered for stable voltage reference and shunt regulation in cost-sensitive, space-constrained consumer and industrial electronics.

FAQ

What is the maximum continuous Zener current for BZV55-C18,135 at 25 °C ambient?

The device supports up to 250 mA forward current per absolute maximum ratings, but continuous Zener operation is limited by power dissipation. At 25 °C ambient, with 500 mW P_tot and 18 V V_Z, maximum continuous Zener current is approximately 27.8 mA (500 mW ÷ 18 V). Derating applies above 50 °C ambient per thermal characteristics.

How does the +12.4 mV/K temperature coefficient affect circuit performance?

A +12.4 mV/K coefficient means V_Z increases by ~12.4 mV per °C rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C), this causes ~1.24 V drift-significant in precision references. Designers mitigate this via thermal isolation, compensation networks, or selecting higher-V_Z diodes with near-zero coefficients (e.g., 5.6 V types).

Can BZV55-C18,135 be used in place of a 1N4746A?

No-1N4746A is a 18 V, 1 W through-hole Zener in DO-41 package with 20 Ω r_dif. BZV55-C18,135 has higher r_dif (70 Ω) and lower power rating (500 mW), making it unsuitable for high-current regulation. It can replace 1N4746A only in low-power SMD designs where surge immunity and footprint are prioritized over regulation tightness.

What is the significance of the "135" suffix in BZV55-C18,135?

The "135" is Nexperia's packing code indicating 10,000 units per reel in 4 mm pitch tape-and-reel packaging (per Table 10). It does not affect electrical specifications-BZV55-C18 and BZV55-C18,135 share identical Zener voltage, tolerance, and thermal parameters.

BZV55-C18,135 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: DO-213AC, MINI-MELF, SOD-80

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 18 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 45 Ohms

Current - Reverse Leakage @ Vr:: 50 nA @ 12.6 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 200°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: LLDS; MiniMelf

BZV55-C18,135 FAQ

1.How can I place an order for BZV55-C18,135 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZV55-C18,135 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 BZV55-C18,135 reliable?

The price and inventory of BZV55-C18,135 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZV55-C18,135 is usually 5 days.

3.What payment methods are accepted for BZV55-C18,135?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZV55-C18,135 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZV55-C18,135?

BZV55-C18,135 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZV55-C18,135 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 BZV55-C18,135?

For technical support, including BZV55-C18,135 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZV55-C18,135 requirements.

6.How does Aetrix verify that BZV55-C18,135 is sourced from the original manufacturer or authorized distributors?

All BZV55-C18,135 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 BZV55-C18,135 meets industry standards.

7.What is the process for return or replacement of BZV55-C18,135?

All BZV55-C18,135 units undergo pre-shipment inspection (PSI). If there is an issue with BZV55-C18,135, 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 BZV55-C18,135 part is unused and in its original packaging.

Return procedure for BZV55-C18,135:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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