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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation 1.5KE12A R0G

Name: 1.5KE12A R0G
Brand: Taiwan Semiconductor Corporation
SKU: 1.5KE12A R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KE12A R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-201AA, DO-27, Axial

Datasheet:: 1.5KE12A R0G.pdf

Description:: TVS DIODE 10.2VWM 16.7VC DO201

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Product details

Overview

1.5KE12A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 12V, minimum V_BR = 11.4V at 1.0mA, maximum clamping voltage V_C = 16.7V at 94A peak pulse current, and working stand-off voltage V_WM = 10.2V - used for automotive load-dump and inductive switching protection in power supply rails.

For engineers reviewing the 1.5KE12A R0G datasheet, 1.5KE12A R0G pinout, 1.5KE12A R0G application, or 1.5KE12A R0G equivalent, key selection criteria include clamping performance under 10/1000μs surge, low leakage (<1μA @ 10.2V), AEC-Q101 qualification status, thermal derating above 25°C, and DO-201 mechanical compatibility with high-current PCB traces.

Technical Context

This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below V_WM = 10.2V, then avalanches sharply at V_BR = 11.4–12.6V to limit transient overvoltage. Its 1500W peak pulse power rating is specified at T_A = 25°C with 10/1000μs waveform and derates linearly above that ambient temperature.

Designed for automotive-grade reliability, the 1.5KE12A R0G meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and passes JESD201 Class 2 whisker testing. It exhibits fast response time (<1.0ps from 0V to V_BR) and low dynamic impedance to ensure effective suppression of ESD and load-dump transients before downstream ICs are damaged.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	10.2 V - Maximum continuous reverse operating voltage before significant leakage begins; sets safe DC rail margin for 12V automotive systems.
V_BR @ I_T = 1.0 mA	11.4–12.6 V - Breakdown voltage range defining reliable avalanche onset; ensures consistent clamping across production lots.
V_C @ I_PP = 94 A	16.7 V - Maximum clamped voltage during 10/1000μs surge; determines worst-case overvoltage seen by protected circuitry.
P_PK	1500 W - Peak pulse power handling capability at T_A = 25°C; defines survivability against ISO 7637-2 Pulse 5a (load dump).
I_PP	94 A - Peak impulse current corresponding to V_C; used to size PCB trace width and verify layout robustness.
Junction Temp Range	−55°C to +175°C - Extended thermal operating envelope supporting under-hood automotive placement without derating.
Leakage @ V_WM	<1 μA - Ultra-low reverse leakage preserves battery life in always-on vehicle modules and avoids false triggers.

Pinout & Package

Package: DO-201 axial leaded plastic package with cathode band marking; case meets UL 94V-0 flammability rating; pure tin-plated leads compliant with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Ground reference terminal	Connected to system ground or low-side return path; carries full surge current during clamping event.
Cathode	Protected line input	Connected to 12V rail or signal line; polarity-marked band identifies this terminal; reverse-biased during normal operation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD - enables use in safety-critical ECUs without additional qualification.
1500W 10/1000μs surge rating	Withstands ISO 7637-2 Pulse 5a (load dump up to 60V/100ms) when mounted on ≥16mm×16mm copper pad - eliminates need for external heat sinking in most applications.
Clamping voltage ≤16.7V @ 94A	Ensures downstream 16V-rated regulators and microcontrollers remain within absolute maximum ratings during worst-case transients.
Response time <1.0ps	Activates before ESD or fast-switching transients propagate beyond the device - critical for protecting CAN transceivers and sensor interfaces.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling requirements.

Applications

Automotive Power Rail Protection	Industrial Sensor Interface Protection
Use Scenario: Suppresses load-dump transients (up to 60V, 100ms) on 12V battery-fed ECUs such as body control modules and lighting drivers. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly across power input pins to clamp overvoltage before it reaches LDOs and MCUs. Use Value: Prevents latch-up or permanent damage to 16V-rated power management ICs during cold-crank and alternator regulation faults.	Use Scenario: Protects analog front-end inputs of industrial pressure/temperature sensors exposed to inductive kickback from nearby solenoid valves. IC Role / Device Role / Timing Role: Fast-acting voltage clamp on sensor signal lines (e.g., 4–20mA loop or 0–5V output) to absorb 10/1000μs surges. Use Value: Maintains signal integrity and prevents ADC saturation or op-amp input stage damage during field wiring faults.
LED Driver Overvoltage Protection	Power Supply Input Stage Clamping
Use Scenario: Guards constant-current LED driver ICs against voltage spikes induced by hot-plug events or cable disconnection in commercial lighting systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between driver VIN and GND to clamp positive-going transients only. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and extends lifetime of high-brightness LED arrays by preventing overvoltage stress on internal MOSFETs.	Use Scenario: Installed at AC/DC or DC/DC converter input to limit surges from upstream power distribution networks or lightning-induced coupling. IC Role / Device Role / Timing Role: Primary-level surge suppressor absorbing energy before it reaches bridge rectifiers and bulk capacitors. Use Value: Reduces required MOV energy rating and improves overall system surge immunity to Level 4 (4kV line-earth) per IEC 61000-4-5.

Automotive Power Rail Protection

Industrial Sensor Interface Protection

Use Scenario: Suppresses load-dump transients (up to 60V, 100ms) on 12V battery-fed ECUs such as body control modules and lighting drivers.

IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed directly across power input pins to clamp overvoltage before it reaches LDOs and MCUs.

Use Value: Prevents latch-up or permanent damage to 16V-rated power management ICs during cold-crank and alternator regulation faults.

Use Scenario: Protects analog front-end inputs of industrial pressure/temperature sensors exposed to inductive kickback from nearby solenoid valves.

IC Role / Device Role / Timing Role: Fast-acting voltage clamp on sensor signal lines (e.g., 4–20mA loop or 0–5V output) to absorb 10/1000μs surges.

Use Value: Maintains signal integrity and prevents ADC saturation or op-amp input stage damage during field wiring faults.

LED Driver Overvoltage Protection

Power Supply Input Stage Clamping

Use Scenario: Guards constant-current LED driver ICs against voltage spikes induced by hot-plug events or cable disconnection in commercial lighting systems.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between driver VIN and GND to clamp positive-going transients only.

Use Value: Enables compliance with IEC 61000-4-4 (EFT) and extends lifetime of high-brightness LED arrays by preventing overvoltage stress on internal MOSFETs.

Use Scenario: Installed at AC/DC or DC/DC converter input to limit surges from upstream power distribution networks or lightning-induced coupling.

IC Role / Device Role / Timing Role: Primary-level surge suppressor absorbing energy before it reaches bridge rectifiers and bulk capacitors.

Use Value: Reduces required MOV energy rating and improves overall system surge immunity to Level 4 (4kV line-earth) per IEC 61000-4-5.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ12A	DO-214AA (SMB) package, lower P_PK = 600W, V_C = 19.9V @ 30.1A, higher leakage (~5μA)	Suitable for space-constrained consumer electronics but insufficient for automotive load-dump duty cycle	Select 1.5KE12A R0G when 1500W surge rating and AEC-Q101 qualification are mandatory.
1N6267A	Same DO-201 package, identical V_BR/V_C specs, but not AEC-Q101 qualified and lacks ISO 7637-2 certification	Acceptable for cost-sensitive industrial controls where automotive qualification is unnecessary	Choose 1.5KE12A R0G for automotive OEM designs requiring documented stress-test validation and pulse immunity compliance.

Compared with SMBJ12A and 1N6267A, the 1.5KE12A R0G delivers higher surge robustness (1500W vs. 600W/1500W), guaranteed AEC-Q101 qualification, and explicit ISO 7637-2 Pulse 5a support - making it the only option among the three validated for under-hood automotive deployment without design requalification.

Availability

1.5KE12A R0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver overvoltage suppression requiring stable component supply across multi-year production cycles.

Supply support for 1.5KE12A R0G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.

The 1.5KE series was developed specifically for automotive and industrial transient suppression, emphasizing high-energy clamping, AEC-Q101 reliability, and ISO 7637-2 compliance - targeting engine control units, body electronics, and factory automation systems.

FAQ

What is the maximum clamping voltage of the 1.5KE12A R0G under standard test conditions?

The 1.5KE12A R0G has a maximum clamping voltage V_C of 16.7 V when subjected to a 10/1000μs surge waveform with peak current I_PP = 94 A. This value is measured per JEDEC standards and represents the worst-case voltage imposed on protected circuitry during a full-rated transient event - critical for verifying compatibility with downstream 16V-rated ICs in automotive power domains.

Is the 1.5KE12A R0G AEC-Q101 qualified and what does that mean for automotive use?

Yes, the 1.5KE12A R0G is AEC-Q101 qualified, meaning it has passed accelerated stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model ESD. This qualification validates its reliability for automotive under-hood applications such as engine control units and body electronics - confirming suitability for environments with −40°C to +125°C ambient and exposure to vibration, humidity, and electrical transients.

How does the 1.5KE12A R0G differ from the non-A version 1.5KE12?

The 1.5KE12A R0G differs from 1.5KE12 in tighter parameter tolerances (V_BR = 11.4–12.6 V vs. 10.8–13.2 V), guaranteed AEC-Q101 qualification, and explicit compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b. The "A" suffix denotes enhanced consistency and automotive-grade validation - while both share DO-201 packaging and 1500W rating, only the 1.5KE12A R0G is approved for safety-critical automotive subsystems without additional component-level qualification.

What is the thermal derating behavior of the 1.5KE12A R0G above 25°C ambient temperature?

The 1.5KE12A R0G derates linearly from its 1500W peak pulse power rating at T_A = 25°C, reaching zero rated power at T_A = 175°C. Derating follows the curve in Figure 2 of the official datasheet: at 75°C ambient, it retains ~75% of rated power (≈1125W); at 125°C, ~40% (≈600W). This behavior assumes mounting on a 16mm × 16mm copper pad - smaller pads accelerate thermal limitation and require additional layout margin.

Can the 1.5KE12A R0G be used in bidirectional configurations?

No, the 1.5KE12A R0G is a unidirectional TVS diode and must not be used for bidirectional protection. Its cathode band marking indicates polarity-sensitive operation: it conducts only during positive transients on the cathode relative to anode. For bidirectional applications (e.g., data lines), use the CA-suffixed variant 1.5KE12CA or equivalent symmetric devices - attempting bidirectional use of 1.5KE12A R0G will result in forward conduction and potential failure during negative excursions.

1.5KE12A R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Package/Case:: DO-201AA, DO-27, Axial

Series:: 1.5KE

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 10.2V

Voltage - Breakdown (Min):: 11.4V

Voltage - Clamping (Max) @ Ipp:: 16.7V

Current - Peak Pulse (10/1000µs):: 94A

Power - Peak Pulse:: 1500W (1.5kW)

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201

1.5KE12A R0G FAQ

1.How can I place an order for 1.5KE12A R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KE12A R0G 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 1.5KE12A R0G reliable?

The price and inventory of 1.5KE12A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12A R0G is usually 5 days.

3.What payment methods are accepted for 1.5KE12A R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12A R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KE12A R0G?

1.5KE12A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KE12A R0G 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 1.5KE12A R0G?

For technical support, including 1.5KE12A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12A R0G requirements.

6.How does Aetrix verify that 1.5KE12A R0G is sourced from the original manufacturer or authorized distributors?

All 1.5KE12A R0G 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 1.5KE12A R0G meets industry standards.

7.What is the process for return or replacement of 1.5KE12A R0G?

All 1.5KE12A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12A R0G, 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 1.5KE12A R0G part is unused and in its original packaging.

Return procedure for 1.5KE12A R0G:

1.Submit a request within 90 days.

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

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