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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > Mixed Technology

onsemi NCP3712ASNT3G

Name: NCP3712ASNT3G
Brand: onsemi
SKU: NCP3712ASNT3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP3712ASNT3G

Manufacturer:: onsemi

Category:: Mixed Technology

Package:: SC-74, SOT-457

Datasheet:: NCP3712ASNT3G.pdf

Description:: TVS DEVICE MIXED SC-74

Quantity:: RFQ Add To RFQ list

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Inventory:2,735

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Product details

Overview

NCP3712ASNT3G from onsemi is an over-voltage protected high-side switch designed to isolate sensitive loads from input transients up to 105 V peak, featuring active turn-off response, flexible external Zener-set OV threshold, and guaranteed off-state control via ENBL pin. It delivers ≤0.5 V saturation voltage at 100 mA, supports continuous 200 mA load current without external R_boost, and operates across −40°C to +85°C ambient.

For engineers reviewing the NCP3712ASNT3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 105 V transient withstand rating, active fast-turn-off protection timing (t_PHL ≤ 1.5 µs), SC-74 package footprint, and automotive-grade AEC-Q101 qualification for power distribution in harsh environments.

Technical Context

The NCP3712ASNT3G implements a high-side MOSFET-based switching architecture with integrated over-voltage detection circuitry tied to Pin 4 (V_Z). Its internal comparator monitors input voltage against an externally set Zener reference and triggers immediate gate discharge through Q2 when threshold is exceeded.

It features internal resistor network (R₁ = 4.7 kΩ typ, R₂ = 10 kΩ typ) for biasing and protection, guaranteed off-state operation when ENBL pin voltage exceeds 13 V, and automatic recovery once transient decays below the Zener-defined threshold - no manual reset required.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Input–Output Voltage	105 V - Withstands automotive load-dump transients without clamping or failure
Continuous Load Current	200 mA - Sustains full-rated output current without external boost resistor
V_IO(ON) @ 100 mA	0.2–0.5 V - Enables low-loss power distribution with <0.05 W conduction loss
Propagation Delay t_PHL	≤1.5 µs - Ensures sub-microsecond response to over-voltage events
Operating Temperature	−40°C to +85°C - Validated for under-hood and industrial DC power systems
ESD Rating	2000 V HBM - Robust handling during board assembly and system integration
Package	SC-74 (Case 318F) - 6-pin surface-mount footprint compatible with standard reflow profiles

Pinout & Package

Package: SC-74 (Case 318F), Pb-free, 6-pin surface-mount package with exposed thermal pad (not electrically connected). Dimensions per ON Semiconductor document 98ASB42973B.

Pin/Terminal	Circuit Role	Design Meaning
1 (ENBL)	Enable NOT input	Active-low logic control: ≥13 V guarantees OFF state; drives internal pull-down
2 (VIN)	Input supply rail	High-side switch input; rated for 105 V transient, −9 V reverse
3 (VOUT)	Switched output	Drives load; exhibits −0.7 V reverse breakdown and ≤100 nA leakage at 30 V
4 (VZ)	Over-voltage sense reference	Connects to external Zener cathode; sets precise OV trip point (e.g., 16 V Zener → ~15.5–18.7 V trip)
5 (NC)	No connection	Internally unconnected; must remain floating or grounded per layout guidelines
6 (RBOOST)	Boost resistor terminal	Optional external resistor to enhance drive strength for >200 mA loads

Key Features

Feature	Design Value
Active turn-off protection	Triggers within 1.5 µs of OV event, eliminating reliance on passive clamping
Flexible OV threshold	Set precisely via external Zener diode (e.g., 12 V to 33 V), enabling system-specific trip points
Guaranteed off-state control	ENBL pin ≥13 V forces hard OFF regardless of input voltage or load condition
Automatic recovery	Resumes normal operation after transient decays below threshold-no reset signal needed
AEC-Q101 qualified	Validated for automotive applications including engine control, body electronics, and ADAS power rails

Applications

Automotive Load-Dump Protection	Industrial DC Power Distribution
Use Scenario: Protecting infotainment head units from 12 V battery line load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: High-side transient isolator with sub-µs response, placed upstream of LDOs or DC-DC converters. Use Value: Prevents downstream IC damage by diverting transient energy away from sensitive circuits instead of absorbing it.	Use Scenario: Switching 24 V DC power to PLC I/O modules in factory automation equipment. IC Role / Device Role / Timing Role: Controlled high-side power switch with ENBL logic interface and fault isolation capability. Use Value: Enables remote power cycling and protects modules from brownout-induced latch-up or regulator instability.
Sensitive Circuit Buffering	Voltage Pre-conditioning
Use Scenario: Isolating FPGA configuration circuitry from noisy 5 V supply rails in telecom base stations. IC Role / Device Role / Timing Role: Low-V_DS(on) buffer switch that blocks ripple and surges while passing clean DC. Use Value: Reduces need for oversized input capacitors and eliminates risk of false resets due to supply glitches.	Use Scenario: Conditioning input to a 3.3 V buck converter fed from an unregulated 9–18 V vehicle supply. IC Role / Device Role / Timing Role: Over-voltage clamp and pre-regulator stage limiting max input to safe level for downstream regulator. Use Value: Extends lifetime of downstream switching regulator by preventing over-voltage stress on its input capacitors and MOSFETs.

Automotive Load-Dump Protection

Industrial DC Power Distribution

Use Scenario: Protecting infotainment head units from 12 V battery line load-dump transients (ISO 7637-2 Pulse 5a).

IC Role / Device Role / Timing Role: High-side transient isolator with sub-µs response, placed upstream of LDOs or DC-DC converters.

Use Value: Prevents downstream IC damage by diverting transient energy away from sensitive circuits instead of absorbing it.

Use Scenario: Switching 24 V DC power to PLC I/O modules in factory automation equipment.

IC Role / Device Role / Timing Role: Controlled high-side power switch with ENBL logic interface and fault isolation capability.

Use Value: Enables remote power cycling and protects modules from brownout-induced latch-up or regulator instability.

Sensitive Circuit Buffering

Voltage Pre-conditioning

Use Scenario: Isolating FPGA configuration circuitry from noisy 5 V supply rails in telecom base stations.

IC Role / Device Role / Timing Role: Low-V_DS(on) buffer switch that blocks ripple and surges while passing clean DC.

Use Value: Reduces need for oversized input capacitors and eliminates risk of false resets due to supply glitches.

Use Scenario: Conditioning input to a 3.3 V buck converter fed from an unregulated 9–18 V vehicle supply.

IC Role / Device Role / Timing Role: Over-voltage clamp and pre-regulator stage limiting max input to safe level for downstream regulator.

Use Value: Extends lifetime of downstream switching regulator by preventing over-voltage stress on its input capacitors and MOSFETs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side over-voltage protection applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS26631PWPR	Integrated 60 V OV clamp, no external Zener required; higher 2.5 A current rating; requires external FET for >60 V	Better suited for 24 V industrial systems with tighter OV tolerance; lacks 105 V transient rating	Select when system OV threshold is fixed and higher current delivery is needed; not suitable for 12 V automotive load-dump compliance
MAX16054ATA+	36 V max input; includes undervoltage lockout and thermal shutdown; SPI-configurable thresholds	Targeted at datacom power sequencing; lacks automotive qualification and 105 V rating	Prefer for programmable, multi-rail systems where diagnostics and configurability outweigh transient robustness

Compared with TPS26631PWPR and MAX16054ATA+, the NCP3712ASNT3G uniquely combines 105 V transient immunity, AEC-Q101 qualification, and external Zener flexibility-making it the only option validated for ISO 7637-2 Pulse 5a in cost-sensitive automotive modules.

Availability

NCP3712ASNT3G is available at Aetrix Electronics and suitable for automotive load-dump protection, industrial DC power distribution, and sensitive circuit buffering requiring stable component supply and long-term lifecycle support.

Supply support for NCP3712ASNT3G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NCP3712ASNT3G belongs to onsemi's high-side protection switch product line, engineered specifically for transient isolation in automotive and industrial power systems where reliability under extreme voltage stress is critical.

FAQ

What is the maximum transient voltage the NCP3712ASNT3G can withstand?

The NCP3712ASNT3G is rated for 105 V peak input-to-output voltage per its absolute maximum ratings. This specification enables compliance with ISO 7637-2 Pulse 5a load-dump testing in 12 V automotive systems. The device achieves this by actively disconnecting the load rather than clamping or absorbing energy - preserving downstream components and minimizing thermal stress on the NCP3712ASNT3G itself.

Does the NCP3712ASNT3G require an external boost resistor to drive 200 mA loads?

No, the NCP3712ASNT3G is capable of switching loads up to 200 mA without an external R_boost resistor, as confirmed in its datasheet features and electrical characteristics. The internal driver strength is sufficient for this current level under typical conditions (V_IN = 12.5 V, T_A = 25°C). R_boost (Pin 6) is optional and only recommended for loads exceeding 200 mA or for enhanced turn-on speed in marginal thermal conditions.

How is the over-voltage trip threshold set on the NCP3712ASNT3G?

The over-voltage trip threshold of the NCP3712ASNT3G is set externally using a Zener diode connected between Pin 4 (V_Z) and ground. The datasheet confirms that a 16 V Zener yields a trip range of 15.5 V to 18.7 V depending on load and temperature. This architecture allows designers to select any Zener voltage (e.g., 12 V, 18 V, 24 V) to match system-level protection requirements without modifying the NCP3712ASNT3G itself.

Is the NCP3712ASNT3G qualified for automotive applications?

Yes, the NCP3712ASNT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in its datasheet. The "SZ" prefix variants (e.g., SZNCP3712ASNT3G) denote automotive-grade versions meeting additional site and control change requirements. The NCP3712ASNT3G shares the same die and qualification - it is manufactured in onsemi's AEC-Q101-certified facilities and tested to automotive reliability standards including temperature cycling, HTOL, and ESD.

What does the "T3G" suffix mean in NCP3712ASNT3G?

The "T3G" suffix in NCP3712ASNT3G indicates tape-and-reel packaging: 10,000 units per reel, Pb-free (RoHS-compliant), and SC-74 package. The "T1G" variant contains 3,000 units per reel. Both share identical electrical specifications and thermal performance. The "G" denotes lead-free finish; "T" denotes tape-and-reel; "3" specifies the reel quantity - a key detail for production planning and automated assembly.

NCP3712ASNT3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Package/Case:: SC-74, SOT-457

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Clamping:: -

Technology:: Mixed Technology

Number of Circuits:: 1

Applications:: General Purpose

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-74

NCP3712ASNT3G FAQ

1.How can I place an order for NCP3712ASNT3G through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP3712ASNT3G 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 NCP3712ASNT3G reliable?

The price and inventory of NCP3712ASNT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP3712ASNT3G is usually 5 days.

3.What payment methods are accepted for NCP3712ASNT3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP3712ASNT3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP3712ASNT3G?

NCP3712ASNT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP3712ASNT3G 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 NCP3712ASNT3G?

For technical support, including NCP3712ASNT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP3712ASNT3G requirements.

6.How does Aetrix verify that NCP3712ASNT3G is sourced from the original manufacturer or authorized distributors?

All NCP3712ASNT3G 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 NCP3712ASNT3G meets industry standards.

7.What is the process for return or replacement of NCP3712ASNT3G?

All NCP3712ASNT3G units undergo pre-shipment inspection (PSI). If there is an issue with NCP3712ASNT3G, 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 NCP3712ASNT3G part is unused and in its original packaging.

Return procedure for NCP3712ASNT3G:

1.Submit a request within 90 days.

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

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