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

Diodes Incorporated 1.5KE8V2CA-B

Name: 1.5KE8V2CA-B
Brand: Diodes Incorporated
SKU: 1.5KE8V2CA-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1.5KE8V2CA-B

Manufacturer:: Diodes Incorporated

Category:: TVS Diodes

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

Datasheet:: 1.5KE8V2CA-B.pdf

Description:: TVS DIODE 7.02VWM 12.1VC DO201

Quantity:: RFQ Add To RFQ list

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Inventory:7,729

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Product details

Overview

1.5KE8V2CA-B from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for clamping ESD and surge transients on power rails and signal lines. It features a 7.02V reverse standoff voltage, 7.79V minimum breakdown voltage at 10mA test current, 12.1V maximum clamping voltage at 124A peak pulse current, and operates across –55°C to +175°C.

For engineers reviewing the 1.5KE8V2CA-B datasheet, 1.5KE8V2CA-B pinout, 1.5KE8V2CA-B application, or 1.5KE8V2CA-B equivalent, this device is selected for high-energy surge protection in automotive power modules, industrial DC input stages, and telecom interface circuits where fast response (<1 ns), low clamping ratio, and AEC-Q200-aligned reliability are required.

Technical Context

This bidirectional TVS operates symmetrically-no cathode polarity-enabling suppression of both positive and negative transients without circuit redesign. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (≤200 µA at 7.02V).

The device delivers 1500W peak pulse power (t_P = 1.0 ms, 10/1000 µs waveform), with a clamping ratio (V_C/V_BR) of 1.55 and temperature coefficient of V_BR at +0.065%/°C, enabling predictable performance across wide thermal ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Pulse Power	1500 W - withstands IEC 61000-4-5 Level 4 surges (4kV, 2Ω source)
Reverse Standoff Voltage (V_RWM)	7.02 V - maximum continuous DC or RMS voltage before significant leakage
Breakdown Voltage (V_BR)	7.79 V min @ 10 mA - guaranteed conduction onset under transient stress
Clamping Voltage (V_C)	12.1 V max @ 124 A - limits downstream voltage during full-rated surge
Peak Pulse Current (I_PP)	124 A - peak current handled at rated clamping voltage
Operating Temperature	–55°C to +175°C - supports under-hood automotive and industrial ambient extremes
Leakage Current (I_R)	≤200 µA @ 7.02 V - minimal standby power loss and signal integrity impact

Pinout & Package

Package: DO-201 axial-leaded epoxy package (UL 94V-0 rated), 25.4 mm overall length, 8.5–9.53 mm body diameter, 0.96–1.06 mm lead diameter. Axial leads are tin-finished and solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Transient return path (bidirectional)	Connected to protected line; conducts during negative excursions
Cathode	Transient return path (bidirectional)	Connected to protected line; conducts during positive excursions - no functional distinction in CA variant

Key Features

Feature	Design Value
Glass-passivated die	Ensures stable V_BR tolerance and long-term reliability under thermal cycling
Bidirectional configuration	Eliminates need for polarity-aware layout; protects AC-coupled or floating nodes
1.12 g mass	Enables mechanical stability in high-vibration environments (e.g., automotive engine control units)
RoHS 3 & "Green" compliant	Contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets automotive ELV and JEDEC J-STD-020 MSL Level 1
Fast response time	<1 ns turn-on - clamps transients before sensitive ICs experience overstress

Applications

Automotive Body Control Module (BCM)

Industrial PLC Digital Input Card

Use Scenario: Protects 12V supply rail against load dump (ISO 7637-2 Pulse 5a) and alternator ripple.

IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller LDOs.

Use Value: Limits rail excursion to ≤12.1V during 124A surge, preventing latch-up or permanent damage to 16V-rated regulators.

Use Scenario: Shields 24V digital input optocoupler front-end from field-wiring induced surges (IEC 61000-4-4 EFT).

IC Role / Device Role / Timing Role: First-line transient absorber before series current-limiting resistor and input Schottky.

Use Value: Clamps 4kV EFT bursts to safe levels within 1 ns, preserving optocoupler CMTI and enabling >100 kV/µs immunity.

Telecom Base Station DC Feeder

Medical Imaging Power Supply Interface

Use Scenario: Guards -48V telecom power feeders against lightning-induced longitudinal surges (ITU-T K.20/21).

IC Role / Device Role / Timing Role: Bidirectional shunt protector across differential pair and common-mode choke output.

Use Value: Symmetric clamping maintains common-mode rejection while limiting differential swing to <25V peak.

Use Scenario: Secures auxiliary 5V/3.3V rails in MRI gradient amplifier control boards exposed to magnetic switching noise.

IC Role / Device Role / Timing Role: Localized rail clamp adjacent to FPGA I/O banks and ADC reference buffers.

Use Value: Sub-13V clamping prevents reference rail perturbation that would degrade 16-bit ADC ENOB by >2 LSB.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ8.0CA	600W rating, SMB package (surface-mount), 12.2V V_C @ 49.2A	Limited to lower-energy surges; requires PCB real estate optimization for thermal relief	Select when board space is constrained and peak surge energy ≤600W
1.5SMC8.2CA	1500W rating, SMC package (surface-mount), 13.4V V_C @ 112A	Higher clamping voltage (+1.3V) and larger footprint than DO-201; no axial lead option	Select when automated assembly is mandatory and axial leads are incompatible with production flow

Compared with SMBJ8.0CA and 1.5SMC8.2CA, the 1.5KE8V2CA-B offers superior surge handling per unit volume via axial leads, lower clamping voltage, and proven robustness in high-temperature through-hole mounting-critical for legacy automotive and industrial chassis designs.

Availability

1.5KE8V2CA-B is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power distribution systems requiring stable component supply despite end-of-life status at original manufacturer.

Supply support for 1.5KE8V2CA-B 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with design, manufacturing, and sales operations across Asia, the Americas, and Europe.

The 1.5KE series belongs to Diodes' high-power TVS portfolio, engineered specifically for industrial and automotive transient immunity compliance (IEC 61000-4-5, ISO 7637-2), emphasizing rugged packaging, tight V_BR tolerance, and extended temperature operation.

FAQ

What does the "CA" suffix indicate in 1.5KE8V2CA-B?

The "CA" suffix denotes a bidirectional configuration: the device clamps both positive- and negative-polarity transients symmetrically, with no cathode marking and identical electrical behavior in either direction. This eliminates polarity-dependent placement errors and simplifies protection of AC-coupled or floating nodes.

Is 1.5KE8V2CA-B still in active production?

No-Diodes Incorporated has marked the entire 1.5KE6V8(C)A–1.5KE400(C)A family as obsolete and discontinued (per DS21503 Rev. 12, May 2023). Aetrix Electronics maintains legacy inventory with full traceability and provides engineering support for last-time buy and obsolescence mitigation planning.

How does the DO-201 package affect thermal performance compared to SMC or SMB?

The DO-201's axial leads provide superior heat conduction into PCB copper planes or heatsinks versus surface-mount packages. At 75°C lead temperature, it sustains 5.0W steady-state dissipation-2.5× higher than SMBJ8.0CA-making it preferred for sustained surge duty cycles or high-ambient environments.

Can 1.5KE8V2CA-B replace unidirectional 1.5KE8V2A in existing designs?

Yes, but only if circuit topology allows symmetrical clamping. The CA version lacks a cathode band and conducts in both directions, so it must not be used where DC bias polarity matters (e.g., in series with blocking diodes or in rectifier-fed supplies). Layout review and transient simulation are recommended before substitution.

1.5KE8V2CA-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

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

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 1

Voltage - Reverse Standoff (Typ):: 7.02V

Voltage - Breakdown (Min):: 7.79V

Voltage - Clamping (Max) @ Ipp:: 12.1V

Current - Peak Pulse (10/1000µs):: 124A

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

1.5KE8V2CA-B FAQ

1.How can I place an order for 1.5KE8V2CA-B through Aetrix?

Please submit a Request for Quotation (RFQ) for 1.5KE8V2CA-B 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 1.5KE8V2CA-B reliable?

The price and inventory of 1.5KE8V2CA-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE8V2CA-B is usually 5 days.

3.What payment methods are accepted for 1.5KE8V2CA-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE8V2CA-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1.5KE8V2CA-B?

1.5KE8V2CA-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1.5KE8V2CA-B 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 1.5KE8V2CA-B?

For technical support, including 1.5KE8V2CA-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE8V2CA-B requirements.

6.How does Aetrix verify that 1.5KE8V2CA-B is sourced from the original manufacturer or authorized distributors?

All 1.5KE8V2CA-B 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 1.5KE8V2CA-B meets industry standards.

7.What is the process for return or replacement of 1.5KE8V2CA-B?

All 1.5KE8V2CA-B units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE8V2CA-B, 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 1.5KE8V2CA-B part is unused and in its original packaging.

Return procedure for 1.5KE8V2CA-B:

1.Submit a request within 90 days.

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

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