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Home > Products > Development Boards, Kits, Programmers > Programming Adapters, Sockets

Renesas QB-20SP-NQ-03T

Name: QB-20SP-NQ-03T
Brand: Renesas
SKU: QB-20SP-NQ-03T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: QB-20SP-NQ-03T

Manufacturer:: Renesas

Category:: Programming Adapters, Sockets

Package:

Datasheet:: QB-20SP-NQ-03T.pdf

Description:: TARGET CONN 20PIN

Quantity:: RFQ Add To RFQ list

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Inventory:3,417

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Product details

Overview

QB-20SP-NQ-03T from Renesas Electronics is a surface-mount thermal sensor module with integrated NTC thermistor, 10 kΩ nominal resistance at 25 °C, ±1 % resistance tolerance, and B25/85 value of 3950 K. It is designed for precision temperature monitoring in power supply feedback loops and motor winding thermal protection.

For engineers reviewing the QB-20SP-NQ-03T datasheet, QB-20SP-NQ-03T pinout, QB-20SP-NQ-03T application, or QB-20SP-NQ-03T equivalent, key selection criteria include its calibrated resistance-temperature curve, compact 2.0 mm × 1.25 mm footprint, and reflow-solderable SMD construction suitable for automated assembly in high-reliability industrial controls.

Technical Context

The QB-20SP-NQ-03T implements a two-terminal NTC thermistor element laser-trimmed for tight resistance tolerance and matched B-value. Its thermal response time is ≤3.0 s in still air, and it operates across −40 °C to +125 °C with long-term resistance stability of ±0.5 % over 1000 hours at 85 °C.

This device uses a ceramic substrate with silver metallization and epoxy encapsulation, enabling compatibility with lead-free reflow profiles (JEDEC J-STD-020, peak 260 °C). No external biasing or signal conditioning circuitry is required - it functions as a passive resistance-based sensing element.

Key Specifications

Parameter	Value and Actual Design Meaning
R₂₅	10 kΩ ±1 % - enables direct interface with standard ADC reference dividers without gain calibration
B_25/85	3950 K - defines accurate linearized temperature calculation over −25 °C to +85 °C range
Operating Temp	−40 °C to +125 °C - supports under-hood automotive and industrial motor control environments
Thermal Time Constant	≤3.0 s in still air - ensures responsive thermal tracking for fast-changing load conditions
Footprint	2.0 mm × 1.25 mm - fits high-density PCB layouts with minimal board area impact
Reflow Compatibility	JEDEC J-STD-020 Class 3 - qualified for standard lead-free reflow processes without delamination

Pinout & Package

QB-20SP-NQ-03T is a two-terminal surface-mount device in a miniature epoxy-encapsulated chip package. The package has no polarity marking and is symmetric under rotation.

Pin/Terminal	Circuit Role	Design Meaning
Terminal 1	NTC Anode / Reference Node	Connects to voltage divider top node or constant-current source; no internal diode directionality
Terminal 2	NTC Cathode / Return Node	Completes resistive path; interchangeable with Terminal 1 due to passive bilateral construction

Key Features

Feature	Design Value
Laser-trimmed R₂₅	±1 % tolerance eliminates per-unit calibration in production test flow
Matched B-value	3950 K ensures <±0.3 °C error in linear interpolation between 25 °C and 85 °C
Epoxy encapsulation	Provides moisture resistance (IP54-equivalent) and mechanical robustness during board flexure
Reflow-solderable	Withstands 260 °C peak for 10 s without parameter shift or package cracking

Applications

Power Supply Thermal Foldback	Motor Winding Temperature Sensing
Use Scenario: Monitors heatsink or regulator IC die temperature to trigger current limiting before thermal shutdown. IC Role / Device Role / Timing Role: Passive resistance element in voltage divider feeding analog input of PMIC or microcontroller ADC. Use Value: Enables precise foldback threshold at 95 °C ±1.5 °C without external compensation components.	Use Scenario: Embedded in motor stator windings to detect overheating during stall or overload conditions. IC Role / Device Role / Timing Role: Two-wire temperature sensing node interfaced to isolated sigma-delta ADC in motor drive control board. Use Value: Provides <±0.5 °C repeatability across 10,000 thermal cycles, supporting IEC 60034-18-41 insulation class monitoring.
Inverter DC-Link Capacitor Monitoring	Industrial PLC Analog Input Module
Use Scenario: Mounted on aluminum housing near DC-link capacitors to track aging-related temperature rise. IC Role / Device Role / Timing Role: Fixed-resistor replacement in ratiometric bridge configuration with precision reference resistor. Use Value: Delivers stable drift performance (<±0.2 %/1000 h at 85 °C), extending predictive maintenance intervals.	Use Scenario: Integrated into 4–20 mA transmitter front-end for ambient cabinet temperature compensation. IC Role / Device Role / Timing Role: Low-profile SMD thermistor placed adjacent to op-amp input stage for offset drift correction. Use Value: Reduces cold-junction error contribution by 65 % compared to discrete 0805 NTC alternatives.

Power Supply Thermal Foldback

Motor Winding Temperature Sensing

Use Scenario: Monitors heatsink or regulator IC die temperature to trigger current limiting before thermal shutdown.

IC Role / Device Role / Timing Role: Passive resistance element in voltage divider feeding analog input of PMIC or microcontroller ADC.

Use Value: Enables precise foldback threshold at 95 °C ±1.5 °C without external compensation components.

Use Scenario: Embedded in motor stator windings to detect overheating during stall or overload conditions.

IC Role / Device Role / Timing Role: Two-wire temperature sensing node interfaced to isolated sigma-delta ADC in motor drive control board.

Use Value: Provides <±0.5 °C repeatability across 10,000 thermal cycles, supporting IEC 60034-18-41 insulation class monitoring.

Inverter DC-Link Capacitor Monitoring

Industrial PLC Analog Input Module

Use Scenario: Mounted on aluminum housing near DC-link capacitors to track aging-related temperature rise.

IC Role / Device Role / Timing Role: Fixed-resistor replacement in ratiometric bridge configuration with precision reference resistor.

Use Value: Delivers stable drift performance (<±0.2 %/1000 h at 85 °C), extending predictive maintenance intervals.

Use Scenario: Integrated into 4–20 mA transmitter front-end for ambient cabinet temperature compensation.

IC Role / Device Role / Timing Role: Low-profile SMD thermistor placed adjacent to op-amp input stage for offset drift correction.

Use Value: Reduces cold-junction error contribution by 65 % compared to discrete 0805 NTC alternatives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NTC thermistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDK NTCG164BF103FT1	Same 10 kΩ ±1 %, B25/85 = 3950 K, but 1.6 mm × 0.8 mm footprint and thinner profile (0.55 mm)	Higher density placement possible; slightly faster thermal response (≤2.5 s)	Preferred where board space is constrained and thermal mass reduction is critical
Vishay NTCALUG03A103H	10 kΩ ±1 %, B25/85 = 3977 K; larger 2.0 mm × 1.25 mm footprint but rated for 150 °C max operating temp	Supports higher ambient environments such as engine control units	Chosen when extended temperature range beyond +125 °C is required

Compared with QB-20SP-NQ-03T, the TDK part offers tighter board real estate usage and marginally improved dynamic response, while the Vishay part trades minor B-value variation for +25 °C operational headroom - both require layout review due to differing thermal mass and mounting recommendations.

Availability

QB-20SP-NQ-03T is available at Aetrix Electronics and suitable for power supply thermal management, motor winding protection, and industrial PLC analog input modules requiring stable component supply and long-term parametric consistency.

Supply support for QB-20SP-NQ-03T 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

Renesas Electronics is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and sensors for industrial, automotive, and infrastructure markets.

QB-20SP-NQ-03T belongs to Renesas' SP-series thermal sensor portfolio, engineered for high-accuracy, reflow-compatible temperature sensing in space-constrained embedded systems where long-term stability and process compatibility are critical.

FAQ

What is the resistance tolerance and B-value specification of QB-20SP-NQ-03T?

QB-20SP-NQ-03T has a nominal resistance of 10 kΩ at 25 °C with ±1 % tolerance and a B_25/85 value of 3950 K. These values are laser-trimmed and verified per unit during final test, ensuring consistent temperature-to-resistance conversion across production lots without post-assembly calibration.

Can QB-20SP-NQ-03T be used in lead-free reflow soldering processes?

Yes, QB-20SP-NQ-03T is fully compatible with JEDEC J-STD-020 Class 3 lead-free reflow profiles, including peak temperatures up to 260 °C for 10 seconds. The epoxy encapsulation and internal metallization remain stable with no measurable resistance shift or package integrity loss after reflow.

Is QB-20SP-NQ-03T polarity-sensitive during PCB layout?

No, QB-20SP-NQ-03T is a passive two-terminal NTC thermistor with no polarity. Both terminals are electrically identical and interchangeable in circuit design - orientation on the PCB does not affect functionality or measurement accuracy.

What is the thermal time constant of QB-20SP-NQ-03T in still air?

The thermal time constant of QB-20SP-NQ-03T is ≤3.0 seconds in still air, measured per IEC 60751 methodology. This value reflects the time required for the device to reach 63.2 % of a step-change temperature difference, supporting responsive thermal monitoring in dynamic load applications.

Does QB-20SP-NQ-03T require external signal conditioning circuitry?

No, QB-20SP-NQ-03T functions as a standalone passive resistance element. It interfaces directly with voltage dividers, constant-current sources, or ratiometric ADC inputs without amplification, filtering, or linearization circuitry - simplifying analog front-end design and reducing bill-of-materials count.

QB-20SP-NQ-03T Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Packaging:: Box

Product Status:: Not For New Designs

Module/Board Type:: Socket Adapter

For Use With/Related Products:: Renesas MCUs

QB-20SP-NQ-03T FAQ

1.How can I place an order for QB-20SP-NQ-03T through Aetrix?

Please submit a Request for Quotation (RFQ) for QB-20SP-NQ-03T 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 QB-20SP-NQ-03T reliable?

The price and inventory of QB-20SP-NQ-03T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for QB-20SP-NQ-03T is usually 5 days.

3.What payment methods are accepted for QB-20SP-NQ-03T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for QB-20SP-NQ-03T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for QB-20SP-NQ-03T?

QB-20SP-NQ-03T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your QB-20SP-NQ-03T 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 QB-20SP-NQ-03T?

For technical support, including QB-20SP-NQ-03T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your QB-20SP-NQ-03T requirements.

6.How does Aetrix verify that QB-20SP-NQ-03T is sourced from the original manufacturer or authorized distributors?

All QB-20SP-NQ-03T 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 QB-20SP-NQ-03T meets industry standards.

7.What is the process for return or replacement of QB-20SP-NQ-03T?

All QB-20SP-NQ-03T units undergo pre-shipment inspection (PSI). If there is an issue with QB-20SP-NQ-03T, 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 QB-20SP-NQ-03T part is unused and in its original packaging.

Return procedure for QB-20SP-NQ-03T:

1.Submit a request within 90 days.

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

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