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

Nexperia USA Inc. PLVA665A,215

Name: PLVA665A,215
Brand: Nexperia USA Inc.
SKU: PLVA665A,215
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PLVA665A,215

Manufacturer:: Nexperia USA Inc.

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: PLVA665A,215.pdf

Description:: DIODE ZENER 6.5V 250MW TO236AB

Quantity:: RFQ Add To RFQ list

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Inventory:1,752

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Product details

Overview

PLVA665A from Nexperia is a low-voltage avalanche regulator diode in SOT23 (TO-236AB) package, designed for precision voltage stabilization at 6.50 V nominal working voltage with ±0.20 V tolerance, 2.90 mV/K temperature coefficient, and 0.9 nA reverse current at 50 % VZ. It delivers low-noise regulation in CMOS RAM backup and smoke detector relay circuits.

For engineers reviewing the PLVA665A datasheet, PLVA665A pinout, PLVA665A application, or PLVA665A equivalent, key selection criteria include its 100 Ω dynamic resistance at 250 µA, hard breakdown knee, 250 mW total power dissipation, and SOT23-compatible thermal resistance of 500 K/W in free air.

Technical Context

This device operates as a two-terminal Zener-type voltage reference using controlled avalanche breakdown in silicon, optimized for low-current (10 µA to 1 mA) regulation with minimal line regulation error (≤0.1 V). Its design targets stable biasing where low noise and tight VZ tolerance are critical.

The PLVA665A exhibits a hard breakdown knee and low dynamic impedance-approximately 5 % of conventional series diodes-enabling precise voltage clamping without external compensation. Its 1.0 µV/√Hz noise voltage density at 1 kHz supports sensitive analog and memory retention applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal VZ	6.50 V at IZ = 250 µA - defines primary regulation point for low-power bias networks
VZ Tolerance	±0.20 V (6.30–6.70 V) - ensures predictable clamping across production lots
Dynamic Resistance RZ	100 Ω at 1 kHz, 10 % AC superimposed on DC - maintains regulation stability under small-signal ripple
Reverse Current IR	0.9 nA at VR = 50 % VZ - enables ultra-low standby leakage in battery-backed circuits
Temperature Coefficient SZ	+2.90 mV/K - quantifies VZ drift over operating temperature range
Total Power Dissipation	250 mW at Tamb = 25 °C - sets maximum continuous DC power handling on standard FR4 PCB
Noise Voltage Density Vn	1.0 µV/√Hz at f = 1 kHz - specifies inherent broadband noise floor for low-noise analog references

Pinout & Package

PLVA665A uses the SOT23 (TO-236AB) surface-mount plastic package: 3-pin, single-row, gull-wing leads, 1.9 mm × 1.1 mm body, 0.95 mm height, and standard footprint per Fig. 2 (reflow soldering).

Pin/Terminal	Circuit Role	Design Meaning
1 (A)	Anode	Forward-biased terminal; connects to lower-potential node in reverse-bias regulation configuration
2 (n.c.)	Not Connected	Internally unconnected; must remain floating-no PCB trace or thermal pad connection
3 (K)	Cathode	High-impedance input for reverse-bias operation; ties to regulated voltage rail

Key Features

Feature	Design Value
Hard breakdown knee	Enables sharp, repeatable turn-on without soft saturation-critical for accurate voltage limiting
Low noise performance	1.0 µV/√Hz at 1 kHz-supports clean reference generation in analog sensor interfaces and memory backup
Very low dynamic impedance	100 Ω at 250 µA-reduces output voltage variation under load transients by >95 % vs conventional diodes
Tight VZ tolerance	±0.20 V at 25 °C-minimizes binning requirements and simplifies system-level calibration
Ultra-low IR at low VR	0.9 nA at 50 % VZ-extends battery life in always-on CMOS RAM hold-up circuits

Applications

CMOS RAM Backup

Voltage Stabilizer

Use Scenario: Maintaining data integrity in SRAM/DRAM during main power loss using coin-cell or supercapacitor backup.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator providing stable 6.5 V bias to memory V_CC pin during brownout.

Use Value: 0.9 nA reverse leakage preserves backup energy for >10 years; hard knee prevents premature discharge.

Use Scenario: Generating a stable reference for ADC biasing or op-amp feedback in portable instrumentation.

IC Role / Device Role / Timing Role: Passive voltage reference element in high-impedance divider networks.

Use Value: 100 Ω dynamic resistance ensures <0.1 V line regulation error across 10 µA–1 mA load range.

Voltage Limiter

Smoke Detector Relay Driver

Use Scenario: Clamping transient overvoltage on microcontroller I/O lines exposed to ESD or inductive kickback.

IC Role / Device Role / Timing Role: Fast-response shunt clamp protecting downstream logic inputs.

Use Value: Hard breakdown knee activates within nanoseconds; 30 W non-repetitive peak power handles 15 kV HBM ESD events.

Use Scenario: Biasing optocoupler LED or relay coil driver in battery-powered fire alarm control panels.

IC Role / Device Role / Timing Role: Precision voltage source setting trip threshold for smoke-sensing comparator.

Use Value: +2.90 mV/K coefficient enables predictable thermal drift compensation in ambient temperature ranges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-voltage avalanche regulator diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C6V2	6.2 V nominal VZ, ±5 % tolerance, 150 Ω RZ, 100 nA IR at 50 % VZ	Higher leakage and looser tolerance reduce accuracy in long-term RAM backup	Acceptable for cost-sensitive, non-critical clamping where 0.3 V VZ offset is tolerable
MMBZ5233B	6.0 V nominal VZ, ±5 % tolerance, 170 Ω RZ, 1 µA IR at 50 % VZ	Higher noise (2.5 µV/√Hz) and softer knee degrade precision in analog references	Suitable for general-purpose voltage limiting but not for low-noise or ultra-low-leakage designs

Compared with BZX84-C6V2 and MMBZ5233B, PLVA665A offers tighter VZ tolerance (±0.20 V vs ±5 %), lower IR (0.9 nA vs ≥100 nA), and lower RZ (100 Ω vs ≥150 Ω), making it uniquely suited for battery-critical and low-noise analog applications where regulation fidelity is non-negotiable.

Availability

PLVA665A is available at Aetrix Electronics and suitable for CMOS RAM backup circuits, smoke detector relay drivers, and low-noise voltage stabilizers requiring stable component supply with guaranteed long-term continuity.

Supply support for PLVA665A 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, logic, and MOSFET devices, headquartered in Nijmegen, Netherlands.

The PLVA6xxA series was developed specifically for low-current, low-noise voltage regulation in space-constrained, battery-dependent systems-emphasizing ultra-low leakage, tight VZ tolerance, and stable thermal behavior.

FAQ

What is the maximum reverse voltage PLVA665A can withstand continuously?

The PLVA665A has no specified continuous reverse voltage rating beyond its nominal 6.50 V working voltage. Its absolute maximum non-repetitive peak reverse power dissipation is 30 W for 100 µs pulses at 150 °C junction temperature. Continuous operation must remain within the 250 mW total power dissipation limit at 25 °C ambient, derated per Rth(j-a) = 500 K/W.

Can PLVA665A be used in place of a standard 6.2 V Zener diode?

PLVA665A is not a drop-in replacement for 6.2 V Zeners due to its higher nominal VZ (6.50 V), tighter tolerance (±0.20 V), and significantly lower leakage (0.9 nA vs typical 100–500 nA). Circuit redesign is required if exact 6.2 V regulation or higher leakage is needed for bias current generation.

Does PLVA665A require a series resistor in all applications?

Yes-a current-limiting resistor is mandatory to set the operating Zener current (IZ) between 10 µA and 1 mA. Without it, excessive current causes thermal runaway. The resistor value is calculated as (V_IN − 6.5 V)/I_Z, where I_Z is selected based on required regulation stability and power budget.

Is PLVA665A qualified for automotive applications?

No. Per Nexperia's revision history (Rev. 4, Jan 2023), PLVA665A is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, consult Nexperia's -Q qualified alternatives such as PZTA665A-Q.

PLVA665A,215 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.5 V

Tolerance:: ±3%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 100 Ohms

Current - Reverse Leakage @ Vr:: 40 nA @ 5.9 V

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

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-236AB

PLVA665A,215 FAQ

1.How can I place an order for PLVA665A,215 through Aetrix?

Please submit a Request for Quotation (RFQ) for PLVA665A,215 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 PLVA665A,215 reliable?

The price and inventory of PLVA665A,215 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PLVA665A,215 is usually 5 days.

3.What payment methods are accepted for PLVA665A,215?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PLVA665A,215 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PLVA665A,215?

PLVA665A,215 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PLVA665A,215 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 PLVA665A,215?

For technical support, including PLVA665A,215 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PLVA665A,215 requirements.

6.How does Aetrix verify that PLVA665A,215 is sourced from the original manufacturer or authorized distributors?

All PLVA665A,215 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 PLVA665A,215 meets industry standards.

7.What is the process for return or replacement of PLVA665A,215?

All PLVA665A,215 units undergo pre-shipment inspection (PSI). If there is an issue with PLVA665A,215, 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 PLVA665A,215 part is unused and in its original packaging.

Return procedure for PLVA665A,215:

1.Submit a request within 90 days.

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

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