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Taiwan Semiconductor Corporation 1.5KE12
- Part No.:
- 1.5KE12
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE12.pdf
- Description:
- 1500W, 12V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,830
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Product details
Overview
1.5KE12 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 12V, minimum VBR 10.8V at 1.0mA test current, maximum clamping voltage 17.3V at 91A peak pulse current, and working stand-off voltage 9.72V - designed for automotive and industrial power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE12 datasheet, 1.5KE12 pinout, 1.5KE12 application, or 1.5KE12 equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and real-world ESD/inductive-switching protection use cases - all confirmed from Taiwan Semiconductor's official O2104 specification release.
Technical Context
The 1.5KE12 operates as a unidirectional avalanche diode with cathode-band polarity marking, exhibiting low dynamic impedance and sub-1ps response time from 0V to VBR. Its junction temperature range spans −55°C to +175°C, and it sustains 1500W non-repetitive peak pulse power per 10/1000μs waveform per Fig.3.
It meets ISO 7637-2 immunity requirements for automotive electronics and complies with RoHS and halogen-free standards (IEC 61249-2-21). The device uses pure tin-plated leads solderable per J-STD-002 and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min / max | 10.8V / 13.2V at 1.0mA - defines reliable avalanche initiation threshold across production lot and temperature |
| VWM | 9.72V - maximum continuous reverse voltage before leakage exceeds 1µA, ensuring safe operation on 9V nominal rails |
| VC @ IPP | 17.3V at 91A - clamping voltage during full 1500W surge, limiting downstream IC stress to ≤17.3V |
| PPK | 1500W - peak pulse power handling capability per 10/1000μs standard waveform, derated above 25°C ambient |
| IFSM | 200A - single half-sine surge current rating (8.3ms), supporting high-energy inductive load switching events |
| TJ max | +175°C - maximum junction temperature enabling placement near hot components without thermal shutdown |
| Package | DO-201 - industry-standard axial-leaded package with 0.090g mass, UL 94V-0 molding, and cathode band polarity indicator |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking on one end; leads are pure tin-plated, compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 12V rail); avalanches into conduction when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating | Enables robust protection of 12V automotive ECUs against load dump and inductive kick events per ISO 7637-2 |
| <1.0ps response time (unidirectional) | Clamps transients before sensitive logic or analog circuitry experiences overvoltage stress |
| AEC-Q101 qualified option | Validated for automotive under-hood applications requiring reliability across −40°C to +125°C case temperature |
| Low dynamic impedance | Minimizes clamping voltage overshoot during fast-rising EFT bursts (IEC 61000-4-4) |
| RoHS & halogen-free | Meets EU environmental compliance and IPC/JEDEC material declarations for industrial and consumer systems |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power lines from alternator load dump and relay coil flyback in BCMs. IC Role / Device Role: Unidirectional TVS placed between 12V supply rail and ground, with cathode tied to rail. Use Value: Clamps 12V rail to ≤17.3V during 1500W surges, preventing damage to 24V-tolerant MCUs and transceivers. |
Use Scenario: Shields 24V digital input circuits from field-wiring ESD and inductive transients in factory automation PLCs. IC Role / Device Role: Standoff protection on dry-contact inputs, absorbing >8kV contact ESD per IEC 61000-4-2. Use Value: Limits input node voltage to 17.3V during 91A surge, preserving optocoupler and Schmitt-trigger integrity. |
| LED Lighting Driver Power Stage | Automotive Infotainment Power Supply |
Use Scenario: Guards buck converter input stage against voltage spikes from long cable runs and motor drive coupling in commercial LED drivers. IC Role / Device Role: Primary rail clamp on 12–24V DC input, upstream of input filter capacitor. Use Value: Absorbs 10/1000μs surges up to 1500W without degradation, maintaining driver uptime in harsh environments. |
Use Scenario: Safeguards USB-C PD and audio codec power supplies in head units exposed to battery disconnect transients. IC Role / Device Role: Secondary-side TVS on 5V/3.3V LDO outputs, triggered by upstream rail collapse. Use Value: Prevents latch-up in USB PHYs by clamping output nodes to ≤17.3V during 91A coupled surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600W rating, SMC package, 13.3V VC @ 43A - lower power, surface-mount, tighter clamping | Better suited for PCB space-constrained designs with moderate surge exposure (e.g., consumer IoT) | Select SMBJ12A only if system-level surge energy is ≤600W and layout supports SMD mounting. |
| 1N6273A | Same DO-201 package, tighter VBR tolerance (11.4–12.6V), 16.7V VC @ 94A - improved consistency and lower clamping | Preferred for AEC-Q101-compliant automotive modules requiring tighter parametric control | Choose 1N6273A when design requires certified automotive qualification and reduced VC variation across temperature. |
Compared with 1.5KE12, SMBJ12A offers smaller footprint and lower clamping but sacrifices 60% surge capacity; 1N6273A provides identical form factor with tighter VBR, lower VC, and AEC-Q101 validation - making it a drop-in upgrade where qualification and consistency are critical.
Availability
1.5KE12 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED driver front-end protection, and infotainment power supplies requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE12 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive power networks and industrial control systems, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging.
FAQ
What is the maximum clamping voltage of the 1.5KE12 under surge conditions?
The 1.5KE12 exhibits a maximum clamping voltage (VC) of 17.3V at 91A peak pulse current (IPP) under the standardized 10/1000μs waveform. This value is measured per JEDEC test conditions and ensures downstream circuitry remains within safe operating limits during full-rated 1500W transients. The 1.5KE12 maintains this clamping performance across its specified junction temperature range of −55°C to +175°C.
Is the 1.5KE12 unidirectional or bidirectional, and how is polarity marked?
1.5KE12 is a unidirectional TVS diode, intended for DC rail protection where polarity is fixed. Polarity is marked by a cathode band on the DO-201 package body - the banded end connects to the protected line (e.g., 12V rail), while the unbanded end connects to ground. Bidirectional variants (e.g., 1.5KE12CA) exist but are distinct part numbers; the 1.5KE12 itself is strictly unidirectional.
Does the 1.5KE12 meet AEC-Q101 reliability standards?
The base 1.5KE12 is not AEC-Q101 qualified; however, the variant 1.5KE12H (or 1N6273AH) carries AEC-Q101 certification for automotive under-hood applications. This qualification includes stress testing across temperature cycling, humidity, mechanical shock, and lifetime reliability - confirming suitability for automotive ECUs, lighting modules, and infotainment systems. Always verify the "H" suffix in ordering codes for AEC-Q101 compliance.
What is the working stand-off voltage (VWM) of the 1.5KE12, and why does it matter?
The 1.5KE12 has a working stand-off voltage (VWM) of 9.72V - the maximum DC or continuous reverse voltage that can be applied without exceeding 1µA leakage current. This parameter ensures the device remains non-conductive during normal operation on a 9V or 12V rail, avoiding power loss or false triggering. It directly determines compatibility with system rail voltages and must be ≥10–15% below nominal supply to accommodate ripple and tolerance.
Can the 1.5KE12 replace older 1N6273 devices in existing designs?
Yes - 1.5KE12 is the modern replacement for JEDEC-type 1N6273, sharing identical DO-201 packaging, pinout, and core electrical specifications (VBR: 10.8–13.2V, VC: 17.3V, PPK: 1500W). Taiwan Semiconductor confirms backward compatibility in mechanical fit, thermal profile, and surge performance. No PCB or schematic changes are required when migrating from 1N6273 to 1.5KE12 in legacy industrial or automotive designs.
1.5KE12 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 91A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE12 FAQ
1.How can I place an order for 1.5KE12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12 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 1.5KE12 reliable?
The price and inventory of 1.5KE12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12 is usually 5 days.
3.What payment methods are accepted for 1.5KE12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12?
1.5KE12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12 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 1.5KE12?
For technical support, including 1.5KE12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12 requirements.
6.How does Aetrix verify that 1.5KE12 is sourced from the original manufacturer or authorized distributors?
All 1.5KE12 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 1.5KE12 meets industry standards.
7.What is the process for return or replacement of 1.5KE12?
All 1.5KE12 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12, 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 1.5KE12 part is unused and in its original packaging.
Return procedure for 1.5KE12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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