My Inquiry
My Account
Nexperia USA Inc. PLVA665A-QR
- Part No.:
- PLVA665A-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PLVA665A-QR.pdf
- Description:
- DIODE ZENER 6.5V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,760
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PLVA665A-Q from Nexperia is a low-voltage avalanche regulator diode in SOT23 (TO-236AB) package, delivering precise 6.50 V nominal working voltage at 250 µA, with 0.9 nA reverse current at 50 % VZ, 2.90 mV/K temperature coefficient, and 100 Ω dynamic resistance - deployed in automotive-grade CMOS RAM backup and voltage limiting circuits.
For engineers reviewing the PLVA665A-Q datasheet, PLVA665A-Q pinout, PLVA665A-Q application, or PLVA665A-Q equivalent, key selection criteria include low-noise regulation (<1.0 µV/√Hz), AEC-Q101 qualification, hard breakdown knee, sub-100 nA leakage at low bias, and thermal resistance of 330 K/W to solder point.
Technical Context
This device operates as a precision Zener-type shunt regulator using controlled avalanche breakdown in silicon, optimized for stable low-current regulation (10 µA–1 mA) with minimal line regulation drift (≤0.1 V). Its hard breakdown knee ensures predictable turn-on without soft saturation.
Designed for automotive environments, it maintains regulation integrity across −65 °C to +150 °C junction temperature range, with non-repetitive peak reverse power dissipation up to 30 W (100 µs pulse) and total power dissipation limited to 250 mW at 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal VZ | 6.50 V at IZ = 250 µA - defines stable regulation point for low-power bias networks |
| Dynamic resistance RZ | 100 Ω at 1 kHz, 10 % AC superimposed on DC - enables low-impedance noise suppression in sensitive analog rails |
| Reverse current IR | 0.9 nA at VR = 50 % VZ - ensures ultra-low standby power loss in battery-backed circuits |
| Temperature coefficient SZ | 2.90 mV/K - quantifies VZ drift over temperature, critical for accuracy in wide-range automotive operation |
| Noise voltage density Vn | ≤1.0 µV/√Hz at 1 kHz - supports low-noise applications such as sensor reference rails and precision comparators |
| Line regulation ΔVZ | ≤0.1 V from IZ = 10 µA to 1 mA - guarantees stable output despite input current variation in high-impedance sources |
Pinout & Package
Package: SOT23 (TO-236AB), surface-mount plastic package with 3 leads, footprint compatible with standard SOT23 reflow and wave soldering profiles per Nexperia's sot023_fr/sot023_fw guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node in shunt regulation configuration |
| 2 | Not connected (n.c.) | Internally unconnected; must remain floating - no PCB trace or thermal pad connection permitted |
| 3 | Cathode (K) | Regulated output node; ties to reference rail and absorbs excess current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Hard breakdown knee | Sharp, repeatable avalanche onset minimizes regulation hysteresis and improves transient response predictability |
| AEC-Q101 qualification | Validated for automotive underhood and cabin applications including engine control modules and body electronics |
| Low noise performance | ≈10 % of conventional series - reduces interference in analog signal chains and precision ADC references |
| Very low dynamic impedance | ≈5 % of conventional series at low currents - enhances regulation stability in microampere-biased circuits |
Applications
| CMOS RAM Backup | Voltage Limiter |
|---|---|
Use Scenario: Maintaining volatile SRAM data during main power interruption in automotive infotainment systems. IC Role / Device Role / Timing Role: Shunt regulator providing stable 6.5 V bias to RAM retention circuitry during brown-out conditions. Use Value: Ultra-low 0.9 nA leakage at 50 % VZ extends battery backup duration without compromising regulation accuracy. |
Use Scenario: Protecting downstream logic inputs from transient overvoltage in LIN bus interface receivers. IC Role / Device Role / Timing Role: Clamping diode limiting input voltage to ≤6.7 V to prevent latch-up in 5 V tolerant GPIOs. Use Value: Hard breakdown knee ensures fast, repeatable clamping onset without overshoot or delayed conduction. |
| Smoke Detector Relay Driver | Automotive Sensor Reference |
Use Scenario: Biasing relay coil drive circuitry in battery-powered residential smoke alarms meeting UL 217 standards. IC Role / Device Role / Timing Role: Low-power voltage stabilizer supplying fixed 6.5 V to optocoupler input stage during alarm activation. Use Value: 250 mW total power dissipation and 150 °C max junction temperature support continuous operation in sealed enclosures. |
Use Scenario: Providing stable reference voltage for MEMS pressure sensor signal conditioning in brake fluid reservoir sensors. IC Role / Device Role / Timing Role: Precision shunt reference generating low-drift bias for instrumentation amplifier gain-setting network. Use Value: 2.90 mV/K temperature coefficient and 100 Ω dynamic resistance minimize reference error across −40 °C to +125 °C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-voltage shunt regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2-Q | 6.2 V nominal VZ, 300 Ω RZ, 100 nA IR at 50 % VZ, same SOT23 package | Higher leakage and impedance reduce suitability for ultra-low-power backup circuits | Select when 6.2 V regulation suffices and cost sensitivity outweighs noise/leakage requirements |
| PLVA662A-Q | 6.20 V nominal VZ, identical RZ, IR, and thermal specs; differs only in VZ tolerance band | Direct drop-in replacement where 6.2 V (vs. 6.5 V) meets system margin requirements | Choose for design reuse where existing layout accommodates ±0.2 V VZ shift without circuit recalibration |
Compared with BZX84-C6V2-Q and PLVA662A-Q, PLVA665A-Q provides tighter VZ accuracy (±0.2 V), lower leakage (0.9 nA), and superior noise performance - making it optimal for high-reliability automotive backup and reference applications demanding long-term stability.
Availability
PLVA665A-Q is available at Aetrix Electronics and suitable for automotive infotainment backup power, smoke detector relay biasing, and MEMS sensor reference voltage generation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PLVA665A-Q 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 components and advanced packaging technologies.
The PLVA6xxA-Q series belongs to Nexperia's AEC-Q101-qualified low-voltage avalanche regulator portfolio, engineered specifically for precision, low-noise, low-leakage shunt regulation in automotive and industrial backup and protection circuits.
FAQ
What is the maximum reverse voltage this diode can withstand before breakdown?
The PLVA665A-Q has a nominal working voltage of 6.50 V at 250 µA, with guaranteed breakdown between 6.30 V (min) and 6.70 V (max) under specified test conditions. It is not rated for sustained reverse voltage above its VZ range - operation beyond 6.70 V risks exceeding the 30 W non-repetitive peak reverse power limit.
Is Pin 2 electrically functional or purely mechanical?
Pin 2 is explicitly designated "not connected (n.c.)" in Nexperia's official pinning information and internal die construction. It serves no electrical function and must remain unconnected on PCB layout - no trace, via, or thermal pad should be attached to this terminal.
How does its noise performance compare to standard Zener diodes?
PLVA665A-Q delivers ≤1.0 µV/√Hz noise voltage density at 1 kHz, approximately one-tenth the noise of conventional series Zeners. This is achieved through optimized avalanche structure and low-current operation, making it suitable for precision analog references where noise floor directly impacts measurement resolution.
Can this device replace a standard 6.8 V Zener in an existing design?
No - PLVA665A-Q is rated 6.50 V nominal (6.30–6.70 V range), not 6.8 V. Substituting it for a 6.8 V part would reduce regulated voltage by ~300 mV, potentially causing undervoltage faults in circuits relying on that exact threshold. Use PLVA668A-Q (6.60–7.00 V) instead for 6.8 V equivalence.
PLVA665A-QR 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:
- ±3.08%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 0.9 nA @ 3.25 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PLVA665A-QR FAQ
1.How can I place an order for PLVA665A-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for PLVA665A-QR 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-QR reliable?
The price and inventory of PLVA665A-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PLVA665A-QR is usually 5 days.
3.What payment methods are accepted for PLVA665A-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PLVA665A-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PLVA665A-QR?
PLVA665A-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PLVA665A-QR 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-QR?
For technical support, including PLVA665A-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PLVA665A-QR requirements.
6.How does Aetrix verify that PLVA665A-QR is sourced from the original manufacturer or authorized distributors?
All PLVA665A-QR 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-QR meets industry standards.
7.What is the process for return or replacement of PLVA665A-QR?
All PLVA665A-QR units undergo pre-shipment inspection (PSI). If there is an issue with PLVA665A-QR, 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-QR part is unused and in its original packaging.
Return procedure for PLVA665A-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PLVA665A-QR Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
