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

Taiwan Semiconductor Corporation 1.5KE47A B0G

Name: 1.5KE47A B0G
Brand: Taiwan Semiconductor Corporation
SKU: 1.5KE47A B0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KE47A B0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

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

Datasheet:: 1.5KE47A B0G.pdf

Description:: TVS DIODE 40.2VWM 64.8VC DO201

Quantity:: RFQ Add To RFQ list

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Inventory:9,410

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Product details

Overview

1.5KE47A B0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 47V nominal breakdown voltage (V_BR = 44.7–49.4 V @ 1 mA), 40.2 V working stand-off voltage (V_WM), and 64.8 V clamping voltage (V_C @ 24 A). It delivers fast response (<1.0 ps), low dynamic impedance, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and EFT protection.

For engineers reviewing the 1.5KE47A B0G datasheet, 1.5KE47A B0G pinout, 1.5KE47A B0G application, or 1.5KE47A B0G equivalent, this part supports high-reliability overvoltage protection in automotive power electronics, industrial control I/O interfaces, and DC power rail surge suppression where precise 47V clamping and AEC-Q101-grade robustness are required.

Technical Context

The 1.5KE47A B0G operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified V_BR range (44.7–49.4 V). Its clamping action limits transient energy to ≤64.8 V at 24 A peak impulse current (I_PP), enabling protection of downstream 48V-rated components. Thermal derating follows JEDEC standard curves, with T_J_MAX = 175°C and steady-state P_D = 5 W on 16 mm × 16 mm copper pad.

It complies with ISO 7637-2 for automotive transients and exhibits <1 μA leakage at 40.2 V (V_WM). The device uses pure tin-plated leads per J-STD-002, passes JESD201 Class 2 whisker testing, and features UL 94V-0 molding compound - confirming suitability for under-hood and industrial environments requiring long-term reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR @ I_T = 1 mA	44.7–49.4 V - defines precise avalanche onset threshold for reliable 47V system-level protection
V_WM	40.2 V - maximum continuous reverse operating voltage without significant leakage
V_C @ I_PP = 24 A	64.8 V - clamped voltage during 10/1000 μs surge, limiting stress on protected ICs
P_PK	1500 W - peak pulse power handling capability under standardized surge waveform
I_PP	24 A - maximum non-repetitive peak impulse current it can safely divert
T_J_MAX	175°C - junction temperature limit supporting operation in high-ambient automotive/industrial enclosures
Package	DO-201 - axial-leaded, through-hole package with cathode band marking and 0.090 g mass

Pinout & Package

1.5KE47A B0G uses the DO-201 package: axial-leaded, molded epoxy case with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band; anode and cathode terminals are functionally asymmetric for unidirectional operation.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Reference node for reverse-biased operation	Connected to system ground or lower-potential rail; forms return path during clamping
Cathode	High-side transient input terminal	Connected to protected line (e.g., 48V supply); conducts avalanche current to anode when V_REV > V_BR

Key Features

Feature	Design Value
1500W surge rating (10/1000μs)	Enables single-device protection against severe load dump and ISO 7637-2 Pulse 5a transients in 48V automotive systems
Clamping voltage ≤64.8 V @ 24 A	Ensures protected 48V logic or power ICs remain below absolute maximum ratings during surge events
Leakage current <1 μA @ 40.2 V	Minimizes standby power loss and avoids false triggering in always-on circuits
AEC-Q101 qualified option available	Validates reliability for automotive under-hood applications including engine control and body electronics
UL 94V-0 flammability rating	Confirms safety compliance for use in enclosed industrial and transportation equipment

Applications

Automotive Power Rail Protection	Industrial PLC Digital I/O Protection
Use Scenario: Suppressing load dump transients (ISO 7637-2 Pulse 5a) on 48V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48V rail and chassis ground to clamp surges within 1 ps. Use Value: Limits peak voltage to 64.8 V, preventing damage to 75V-rated DC-DC controllers and CAN transceivers.	Use Scenario: Protecting 24/48V digital input modules in programmable logic controllers from EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: Standoff-connected TVS absorbing repetitive 5 kV/50 ns pulses at field wiring terminals. Use Value: Maintains <1 μA leakage at 40.2 V, avoiding signal integrity issues while surviving >1000 surges.
LED Driver Overvoltage Clamp	Telecom DC Power Feed Protection
Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to shunt flyback energy before MOSFET breakdown. Use Value: 1500W rating handles 200 A surge peaks from 1 H inductors, extending driver lifetime.	Use Scenario: Shielding PoE-powered equipment front-end rectifiers from lightning-induced surges on -48V telecom feeds. IC Role / Device Role / Timing Role: Primary-stage unidirectional suppressor on DC input, upstream of DC-DC isolation stage. Use Value: 64.8 V clamping ensures downstream SiC rectifiers (V_R_RM = 100 V) operate with ≥35 V margin.

Automotive Power Rail Protection

Industrial PLC Digital I/O Protection

Use Scenario: Suppressing load dump transients (ISO 7637-2 Pulse 5a) on 48V battery-fed ECUs in commercial vehicles.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48V rail and chassis ground to clamp surges within 1 ps.

Use Value: Limits peak voltage to 64.8 V, preventing damage to 75V-rated DC-DC controllers and CAN transceivers.

Use Scenario: Protecting 24/48V digital input modules in programmable logic controllers from EFT bursts (IEC 61000-4-4).

IC Role / Device Role / Timing Role: Standoff-connected TVS absorbing repetitive 5 kV/50 ns pulses at field wiring terminals.

Use Value: Maintains <1 μA leakage at 40.2 V, avoiding signal integrity issues while surviving >1000 surges.

LED Driver Overvoltage Clamp

Telecom DC Power Feed Protection

Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from relay-controlled loads.

IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to shunt flyback energy before MOSFET breakdown.

Use Value: 1500W rating handles 200 A surge peaks from 1 H inductors, extending driver lifetime.

Use Scenario: Shielding PoE-powered equipment front-end rectifiers from lightning-induced surges on -48V telecom feeds.

IC Role / Device Role / Timing Role: Primary-stage unidirectional suppressor on DC input, upstream of DC-DC isolation stage.

Use Value: 64.8 V clamping ensures downstream SiC rectifiers (V_R_RM = 100 V) operate with ≥35 V margin.

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 SMAJ47A	Same DO-214AC (SMA) package; 47V V_BR (44.7–49.4 V), but lower P_PK = 400W and higher V_C = 77.0 V @ 5.2 A	Not suitable for 1500W load dump; limited to low-energy ESD/EFT in space-constrained PCBs	Select only if board layout requires surface-mount and surge energy is ≤400W
ON Semiconductor 1N6287A	Identical electrical specs (V_BR, V_WM, V_C, P_PK) and DO-201 package; same JEDEC 1.5KE47A base part number	No functional difference; fully interchangeable in automotive and industrial designs	Valid second-source alternative with identical performance and qualification status

Compared with 1.5KE47A B0G, SMAJ47A offers smaller footprint but sacrifices 73% surge capacity and clamping headroom, while 1N6287A provides exact parametric and mechanical equivalence - making it a seamless second-source replacement without design or layout changes.

Availability

1.5KE47A B0G is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC feed circuits requiring stable component supply, long-lifecycle support, and AEC-Q101-aligned reliability.

Supply support for 1.5KE47A 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, serving global automotive, industrial, and consumer markets since 1979.

The 1.5KE series was designed specifically for high-energy transient suppression in harsh environments - emphasizing robust DO-201 packaging, ISO 7637-2 compliance, and AEC-Q101 qualification readiness for automotive electronics and heavy-duty industrial controls.

FAQ

What is the clamping voltage of the 1.5KE47A B0G under a 10/1000μs surge?

The 1.5KE47A B0G clamps to a maximum of 64.8 V when subjected to a 24 A peak impulse current (I_PP) under the standard 10/1000 μs double-exponential waveform. This value is measured per JEDEC test conditions and guarantees predictable overvoltage limiting for downstream 48V-rated components in automotive and industrial systems.

Is the 1.5KE47A B0G unidirectional or bidirectional?

The 1.5KE47A B0G is a unidirectional TVS diode, indicated by the absence of "CA" suffix and confirmed by its cathode-band marking and specification of forward voltage (V_F = 3.5 V @ 50 A). It protects against reverse-polarity transients only and must be oriented with cathode toward the protected line.

Does the 1.5KE47A B0G meet AEC-Q101 requirements?

The base 1.5KE47A B0G part is not AEC-Q101 qualified; however, Taiwan Semiconductor offers AEC-Q101-qualified versions in the same family denoted by an "H" suffix (e.g., 1.5KE47AH). The B0G suffix indicates green compound and standard industrial qualification - suitable for non-automotive applications requiring high surge robustness.

What is the maximum working voltage (V_WM) for the 1.5KE47A B0G?

The maximum working stand-off voltage (V_WM) for the 1.5KE47A B0G is 40.2 V DC. This is the highest continuous reverse voltage the device can withstand without exceeding 1 μA leakage current, making it ideal for protecting 48V nominal systems where normal operating voltage remains below this threshold.

What package type does the 1.5KE47A B0G use?

The 1.5KE47A B0G uses the DO-201 axial-leaded package: a molded epoxy case with pure tin-plated leads, cathode band polarity marking, UL 94V-0 flammability rating, and 0.090 g typical weight. It is designed for through-hole mounting and meets JESD201 Class 2 whisker resistance standards.

1.5KE47A 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):: 40.2V

Voltage - Breakdown (Min):: 44.7V

Voltage - Clamping (Max) @ Ipp:: 64.8V

Current - Peak Pulse (10/1000µs):: 24A

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

1.5KE47A B0G FAQ

1.How can I place an order for 1.5KE47A B0G through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KE47A 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 1.5KE47A B0G reliable?

The price and inventory of 1.5KE47A B0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE47A B0G is usually 5 days.

3.What payment methods are accepted for 1.5KE47A B0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE47A B0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KE47A B0G?

1.5KE47A B0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KE47A 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 1.5KE47A B0G?

For technical support, including 1.5KE47A B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE47A B0G requirements.

6.How does Aetrix verify that 1.5KE47A B0G is sourced from the original manufacturer or authorized distributors?

All 1.5KE47A 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 1.5KE47A B0G meets industry standards.

7.What is the process for return or replacement of 1.5KE47A B0G?

All 1.5KE47A B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE47A 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 1.5KE47A B0G part is unused and in its original packaging.

Return procedure for 1.5KE47A B0G:

1.Submit a request within 90 days.

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

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