My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5KE400A B0G
- Part No.:
- 1.5KE400A B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400A B0G.pdf
- Description:
- TVS DIODE 342VWM 548VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE400A B0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 400 V, working stand-off voltage 342 V, clamping voltage 548 V at 2.8 A peak pulse current, and junction temperature range −55 °C to +175 °C - designed for automotive and industrial power rail surge protection.
For engineers reviewing the 1.5KE400A B0G datasheet, 1.5KE400A B0G pinout, 1.5KE400A B0G application, or 1.5KE400A B0G equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world use cases, and validated alternative parts for high-voltage transient suppression in ECU power inputs, lighting drivers, and industrial motor controllers.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its 380–420 V breakdown range (tested at 1 mA), it avalanches rapidly (<1 ps response) to divert surge energy away from downstream circuitry. Its 548 V clamping voltage at 2.8 A ensures safe voltage limiting during 10/1000 µs transients per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Rated for 1500 W peak pulse power and 5 W steady-state dissipation on 16 mm × 16 mm copper pad, it supports robust operation up to 175 °C junction temperature. The DO-201 package features pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 380 V / 420 V - defines reliable avalanche initiation threshold under 1 mA test current; ensures consistent turn-on across temperature and unit variation. |
| VWM | 342 V - maximum continuous reverse operating voltage; must exceed system DC rail (e.g., 24 V or 48 V bus with margin) without leakage degradation. |
| VC @ IPP | 548 V at 2.8 A - clamping voltage during standardized 10/1000 µs surge; determines maximum stress imposed on protected ICs or MOSFETs. |
| PPK | 1500 W - peak pulse power rating; enables handling of severe load dump or inductive switching events in automotive environments. |
| TJ max | +175 °C - maximum junction temperature; supports under-hood deployment and high-ambient industrial applications without derating. |
| ID @ VWM | <1 µA - ultra-low blocking leakage at rated stand-off voltage; prevents parasitic current draw in battery-backed or low-power systems. |
Pinout & Package
DO-201 axial-leaded package: cathode band marked on one end; anode and cathode terminals are non-polarized in layout but functionally asymmetric - cathode connects to protected circuit's positive rail, anode to ground for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection point | Connected to the voltage rail being protected (e.g., 24 V supply line); conducts avalanche current toward ground during overvoltage. |
| Anode (unmarked end) | Low-side reference terminal | Connected to system ground; completes current path during transient clamp; must maintain low-impedance ground return for effective suppression. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge capability | Handles ISO 7637-2 Pulse 5a (load dump) up to 1500 W without failure - critical for 12 V/24 V automotive ECUs. |
| <1 ps response time (unidirectional) | Clamps transients before sensitive logic or gate drivers experience damaging overvoltage - faster than most MOVs or polymer-based protectors. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives - meets environmental requirements for global OEM production. |
| AEC-Q101 qualified option | B0G suffix indicates standard grade; H-suffix variants (e.g., 1.5KE400AH) are AEC-Q101 qualified for automotive reliability validation. |
Applications
| Automotive ECU Power Input Protection | Industrial Motor Drive DC Bus Clamp |
|---|---|
Use Scenario: Protecting microcontroller power rails in engine control units exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V supply and chassis ground, clamping surges within nanoseconds. Use Value: Limits voltage seen by LDOs and MCU VDD pins to ≤548 V, preventing latch-up or oxide breakdown during 1500 W transients. |
Use Scenario: Safeguarding IGBT gate drivers and bus sensing circuits in variable-frequency drives subjected to inductive kickback. IC Role / Device Role / Timing Role: Mounted across DC link capacitor terminals to absorb regenerative energy spikes during rapid deceleration. Use Value: Clamps 400 V-rated bus to 548 V peak during 2.8 A impulse, avoiding overvoltage shutdown or component rupture. |
| LED Streetlight Driver Surge Suppression | Rail-to-Rail Transient Immunity in Telecom Power |
Use Scenario: Shielding constant-current LED driver ICs from lightning-induced surges on outdoor AC/DC input lines. IC Role / Device Role / Timing Role: Placed after bridge rectifier and bulk capacitor to clamp differential-mode transients on 350–400 V DC output rails. Use Value: Maintains <1 µA leakage at 342 V stand-off while delivering 548 V clamping - preserves efficiency and avoids false triggering. |
Use Scenario: Providing secondary-level protection on +48 V telecom power distribution boards against EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Used in parallel with primary MOVs to improve clamping precision and reduce let-through voltage to downstream DC/DC converters. Use Value: Delivers 548 V clamping at 2.8 A with <1 ps response - tighter voltage control than MOV-only solutions, reducing stress on POL regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ400A | Same 400 V nominal, DO-214AC (SMA) package, 1.5 kW rating, but lower clamping voltage (528 V @ 2.8 A) and higher leakage (≤5 µA @ 324 V). | Suitable for space-constrained PCBs where SMA footprint is preferred; less thermal mass than DO-201 limits sustained surge duty cycle. | Select when board area is limited and thermal cycling is moderate; verify ground plane thermal relief matches SMAJ400A's lower thermal resistance. |
| ON Semiconductor 1.5SMC400A | Identical electrical specs (VBR 380–420 V, VC = 548 V @ 2.8 A), same DO-201 package, but rated only to +150 °C TJ max (vs. +175 °C for 1.5KE400A B0G). | Acceptable for commercial/industrial use below 150 °C ambient; not recommended for under-hood automotive deployments requiring full AEC-Q101 thermal margin. | Choose for cost-sensitive industrial designs where junction temperature stays below 150 °C; avoid in high-ambient automotive modules. |
Compared with Littelfuse SMAJ400A and ON Semi 1.5SMC400A, the 1.5KE400A B0G offers superior thermal endurance (+175 °C TJ), identical clamping performance, and DO-201 mechanical robustness - making it optimal for high-reliability automotive and industrial power rail protection where long-term thermal stability is critical.
Availability
1.5KE400A B0G is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and LED lighting system integration requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for 1.5KE400A B0G 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, specializing in TVS diodes, rectifiers, and power devices for automotive and industrial markets.
The 1.5KE series was developed specifically for high-energy transient suppression in harsh environments - targeting ISO 7637-2 compliance, AEC-Q101 qualification readiness, and robust DO-201 reliability in automotive power systems.
FAQ
What is the breakdown voltage tolerance of the 1.5KE400A B0G?
The 1.5KE400A B0G has a guaranteed breakdown voltage range of 380 V to 420 V at 1 mA test current, representing ±5% tolerance around the nominal 400 V rating. This tight spread ensures predictable clamping behavior across production lots and temperature extremes, critical for meeting ISO 7637-2 Pulse 5a voltage limits in automotive applications.
Is the 1.5KE400A B0G unidirectional or bidirectional?
The 1.5KE400A B0G is a unidirectional TVS diode, indicated by the absence of "CA" or "C" suffix and confirmed by its single cathode band marking. It protects against positive-going transients on DC rails only; bidirectional protection requires a separate part such as 1.5KE400CA B0G, which clamps in both polarities.
Does the 1.5KE400A B0G meet AEC-Q101 reliability standards?
The 1.5KE400A B0G (B0G suffix) is the standard-grade version and is not AEC-Q101 qualified. However, Taiwan Semiconductor offers the 1.5KE400AH variant - identical electrically but fully qualified to AEC-Q101 - for automotive applications requiring certified reliability. Always verify suffix code when sourcing for automotive use.
What is the maximum clamping voltage of the 1.5KE400A B0G under surge conditions?
The 1.5KE400A B0G has a maximum clamping voltage of 548 V at 2.8 A peak pulse current (10/1000 µs waveform), as specified in Taiwan Semiconductor's official datasheet. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and must be compared directly against downstream component absolute maximum ratings.
Can the 1.5KE400A B0G be used in parallel for higher surge current handling?
No - the 1.5KE400A B0G should not be paralleled without external balancing resistors due to VBR manufacturing tolerances (±5%). Mismatched breakdown voltages cause uneven current sharing, risking thermal runaway in one device. For higher surge capacity, select a higher-power TVS (e.g., 3KP or 5KP series) or consult Taiwan Semiconductor's application guidance on forced-balanced arrays.
1.5KE400A B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- 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
1.5KE400A B0G FAQ
1.How can I place an order for 1.5KE400A B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400A B0G 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 1.5KE400A B0G reliable?
The price and inventory of 1.5KE400A B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400A B0G is usually 5 days.
3.What payment methods are accepted for 1.5KE400A B0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400A B0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400A B0G?
1.5KE400A B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400A B0G 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 1.5KE400A B0G?
For technical support, including 1.5KE400A B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400A B0G requirements.
6.How does Aetrix verify that 1.5KE400A B0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE400A B0G 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 1.5KE400A B0G meets industry standards.
7.What is the process for return or replacement of 1.5KE400A B0G?
All 1.5KE400A B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400A B0G, 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 1.5KE400A B0G part is unused and in its original packaging.
Return procedure for 1.5KE400A B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400A B0G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
