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

Vishay General Semiconductor - Diodes Division 5KP28A-E3/51

Name: 5KP28A-E3/51
Brand: Vishay General Semiconductor - Diodes Division
SKU: 5KP28A-E3/51
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5KP28A-E3/51

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: P600, Axial

Datasheet:: 5KP28A-E3/51.pdf

Description:: TVS DIODE 28VWM 45.4VC P600

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Product details

Overview

5KP28A-E3/51 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 28 V stand-off voltage (V_WM), 31.1–34.4 V breakdown voltage (V_BR) at 5 mA, 45.4 V maximum clamping voltage (V_C) at 110 A peak pulse current, and 5000 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive power supply outputs and industrial motor drive control circuits.

For engineers reviewing the 5KP28A-E3/51 datasheet, 5KP28A-E3/51 pinout, 5KP28A-E3/51 application, or 5KP28A-E3/51 equivalent, this page delivers verified electrical parameters, P600 package mechanical data, AEC-Q101 qualification status, clamping performance under repetitive transients, and direct alternatives for overvoltage protection design in switching power supplies and sensor interface circuits.

Technical Context

The 5KP28A-E3/51 operates as a silicon avalanche diode with glass-passivated P600 junction, optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its unidirectional polarity enables integration into positive-rail protection schemes without reverse-bias leakage concerns above 28 V.

It sustains 110 A peak pulse current (I_PPM) at 10/1000 μs while limiting clamped voltage to ≤45.4 V - critical for safeguarding 3.3 V/5 V/24 V logic interfaces and MOSFET gate drivers. Thermal derating begins above 25 °C ambient, with max junction temperature of 175 °C and 8.0 W steady-state power dissipation on infinite heatsink at 75 °C lead temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	28.0 V - Maximum continuous reverse operating voltage before conduction; defines safe DC blocking threshold in protected line.
V_BR (min/max)	31.1 V / 34.4 V at 5 mA - Confirmed avalanche onset range; ensures predictable turn-on margin above V_WM.
V_C @ I_PPM	45.4 V at 110 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs.
P_PPM	5000 W - Peak pulse power handling per JEDEC standard; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity.
I_FSM	600 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables crowbar replacement in fuse-coordinated systems.
T_J max.	175 °C - Maximum junction temperature; allows operation in under-hood automotive environments with proper thermal design.
Polarity	Unidirectional - Cathode-banded configuration; suitable for single-polarity rail protection only.

Pinout & Package

5KP28A-E3/51 uses the P600 axial-leaded package: molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 9.5 mm body length, 0.375" (9.5 mm) lead spacing, and cathode indicated by color band. Solderable per J-STD-002/JESD 22-B102; whisker-tested to JESD 201 Class 1A.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side connection point	Connected to ground or low-voltage reference; completes conduction path during transient clamp event.
Cathode	High-side connection point	Connected to protected line (e.g., +24 V rail); color band identifies this terminal for correct PCB orientation.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control unit (ECU) and ADAS power rail protection.
5000 W peak pulse power	Enables single-device protection against IEC 61000-4-5 4 kV surge events without parallel staging or external current sharing.
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients (e.g., inductive kickback), improving margin for 3.3 V microcontroller I/O pins.
Fast response time	<1 ns turn-on latency ensures clamping activation prior to damage threshold of sensitive MOSFETs and op-amps.
RoHS-compliant & halogen-free	Meets JEDEC JS709A and EU Directive 2011/65/EU requirements - supports compliance in industrial and automotive BOMs.

Applications

Automotive Power Supply Output	Industrial Motor Drive Control
Use Scenario: Protection of 24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input rail and bulk capacitor, absorbing energy before it reaches DC-DC converters. Use Value: Withstands 5000 W surges and clamps to ≤45.4 V, preserving 36 V-rated input stages of buck regulators and CAN transceivers.	Use Scenario: Safeguarding gate driver ICs and current sense amplifiers in variable-frequency drives. IC Role / Device Role / Timing Role: Parallel-connected TVS across IGBT collector-emitter or MOSFET drain-source to suppress inductive switching spikes. Use Value: Limits transient voltage to 45.4 V during 110 A turn-off events, preventing gate oxide rupture and false triggering of protection circuitry.
Telecom Line Interface	Consumer Appliance Power Input
Use Scenario: Surge suppression on AC/DC adapter secondary-side outputs feeding baseband processors. IC Role / Device Role / Timing Role: Unidirectional shunt device on +12 V output rail, triggered only during positive overvoltage excursions. Use Value: Provides 28 V nominal hold-off with 31.1–34.4 V controlled breakdown - avoids nuisance tripping during normal 12 V ±10 % regulation.	Use Scenario: Input-stage protection in smart home hubs with universal AC adapters and USB-C PD negotiation. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5 V/9 V/15 V system rails, coordinated with fuses to enable resettable fault recovery. Use Value: Enables crowbar-style fail-safe behavior: conducts fully during overvoltage, allowing fuse blow while limiting downstream voltage to 45.4 V.

Automotive Power Supply Output

Industrial Motor Drive Control

Use Scenario: Protection of 24 V battery-fed ECUs against load dump and alternator ripple transients.

IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between input rail and bulk capacitor, absorbing energy before it reaches DC-DC converters.

Use Value: Withstands 5000 W surges and clamps to ≤45.4 V, preserving 36 V-rated input stages of buck regulators and CAN transceivers.

Use Scenario: Safeguarding gate driver ICs and current sense amplifiers in variable-frequency drives.

IC Role / Device Role / Timing Role: Parallel-connected TVS across IGBT collector-emitter or MOSFET drain-source to suppress inductive switching spikes.

Use Value: Limits transient voltage to 45.4 V during 110 A turn-off events, preventing gate oxide rupture and false triggering of protection circuitry.

Telecom Line Interface

Consumer Appliance Power Input

Use Scenario: Surge suppression on AC/DC adapter secondary-side outputs feeding baseband processors.

IC Role / Device Role / Timing Role: Unidirectional shunt device on +12 V output rail, triggered only during positive overvoltage excursions.

Use Value: Provides 28 V nominal hold-off with 31.1–34.4 V controlled breakdown - avoids nuisance tripping during normal 12 V ±10 % regulation.

Use Scenario: Input-stage protection in smart home hubs with universal AC adapters and USB-C PD negotiation.

IC Role / Device Role / Timing Role: Standoff-rated TVS on 5 V/9 V/15 V system rails, coordinated with fuses to enable resettable fault recovery.

Use Value: Enables crowbar-style fail-safe behavior: conducts fully during overvoltage, allowing fuse blow while limiting downstream voltage to 45.4 V.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ28A	600 W peak power, DO-214AA package, 43.5 V clamping at 13.7 A - lower energy capacity and smaller footprint.	Targeted at board-level signal line protection rather than primary DC bus clamping.	Select SMBJ28A only when surge energy is limited to IEC 61000-4-2 ESD (±15 kV air) and space-constrained layouts prohibit P600.
1.5KE27A	1500 W peak power, DO-201AD package, 43.0 V clamping at 35 A - intermediate power rating with axial lead form factor.	Suitable for legacy designs requiring lower-cost TVS where 5000 W is not mandated by system-level surge test plan.	Choose 1.5KE27A if existing PCB layout accommodates DO-201AD and system requires <3 kV IEC 61000-4-5 immunity.

Compared with SMBJ28A and 1.5KE27A, the 5KP28A-E3/51 delivers 3.3× and 3.3× higher peak pulse power respectively, enabling single-device compliance with automotive load-dump standards (ISO 7637-2 Pulse 5a) and industrial 4 kV surge tests without parallel devices or thermal derating penalties.

Availability

5KP28A-E3/51 is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial motor drive gate driver protection, and telecom DC-DC converter outputs requiring stable component supply across multi-year production cycles.

Supply support for 5KP28A-E3/51 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

Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and AEC-Q qualification.

The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial power systems - delivering robust clamping performance where traditional Zener-based solutions fail under repetitive surge stress.

FAQ

What is the clamping voltage of the 5KP28A-E3/51 under maximum rated surge current?

The 5KP28A-E3/51 has a maximum clamping voltage (V_C) of 45.4 V when subjected to its rated 110 A peak pulse current (I_PPM) using the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 5KP28A-E3/51 maintains this clamping performance across its specified operating temperature range, making it suitable for demanding environments such as automotive under-hood applications.

Is the 5KP28A-E3/51 RoHS compliant and halogen-free?

Yes, the 5KP28A-E3/51 carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU and halogen-free status per JEDEC JS709A standards. The matte tin-plated leads meet J-STD-002 solderability requirements, and the molding compound satisfies UL 94 V-0 flammability rating. These certifications are documented in Vishay's official material declarations and apply specifically to the 5KP28A-E3/51 variant, not inferred from family-level statements.

Does the 5KP28A-E3/51 have AEC-Q101 qualification?

Yes, the 5KP28A-E3/51 is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 20-Nov-12 (Document Number: 88308). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness - validating its suitability for automotive powertrain and chassis applications. The "HE3" variant denotes enhanced AEC-Q101 qualification, but the standard E3 version retains full AEC-Q101 compliance per the manufacturer's published specifications.

What is the standoff voltage and breakdown voltage range for the 5KP28A-E3/51?

The 5KP28A-E3/51 has a nominal standoff voltage (V_WM) of 28.0 V and a guaranteed breakdown voltage (V_BR) range of 31.1 V to 34.4 V at 5 mA test current. This 3.1–3.4 V margin above V_WM ensures reliable non-conduction during normal operation while providing consistent avalanche initiation during overvoltage events. These values are measured per JEDEC registered test methods and are specific to the 5KP28A-E3/51 - not extrapolated from adjacent part numbers in the 5KP family.

Can the 5KP28A-E3/51 be used in bidirectional protection configurations?

No, the 5KP28A-E3/51 is unidirectional only, as stated in the Vishay datasheet under FEATURES and PRIMARY CHARACTERISTICS. It contains a single PN junction oriented for cathode-to-line protection and cannot suppress negative-going transients on the same node. For bidirectional protection, two 5KP28A-E3/51 devices must be connected in series opposition, or a dedicated bidirectional TVS such as 5KP28CA should be selected - which is a distinct part number with different internal construction and electrical characteristics.

5KP28A-E3/51 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: P600, Axial

Series:: TransZorb®

Packaging:: Bulk

Product Status:: Obsolete

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 28V

Voltage - Breakdown (Min):: 31.1V

Voltage - Clamping (Max) @ Ipp:: 45.4V

Current - Peak Pulse (10/1000µs):: 110A

Power - Peak Pulse:: 5000W (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:: P600

5KP28A-E3/51 FAQ

1.How can I place an order for 5KP28A-E3/51 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5KP28A-E3/51 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 5KP28A-E3/51 reliable?

The price and inventory of 5KP28A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP28A-E3/51 is usually 5 days.

3.What payment methods are accepted for 5KP28A-E3/51?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP28A-E3/51 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5KP28A-E3/51?

5KP28A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5KP28A-E3/51 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 5KP28A-E3/51?

For technical support, including 5KP28A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP28A-E3/51 requirements.

6.How does Aetrix verify that 5KP28A-E3/51 is sourced from the original manufacturer or authorized distributors?

All 5KP28A-E3/51 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 5KP28A-E3/51 meets industry standards.

7.What is the process for return or replacement of 5KP28A-E3/51?

All 5KP28A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP28A-E3/51, 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 5KP28A-E3/51 part is unused and in its original packaging.

Return procedure for 5KP28A-E3/51:

1.Submit a request within 90 days.

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

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