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

Vishay General Semiconductor - Diodes Division 5KP28A-E3/73

Name: 5KP28A-E3/73
Brand: Vishay General Semiconductor - Diodes Division
SKU: 5KP28A-E3/73
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 5KP28A-E3/73

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: TVS Diodes

Package:: P600, Axial

Datasheet:: 5KP28A-E3/73.pdf

Description:: TVS DIODE 28VWM 45.4VC P600

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Product details

Overview

5KP28A-E3/73 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in P600 package, designed for high-energy surge protection with 5000 W peak pulse power (10/1000 μs), 28.0 V stand-off voltage (V_WM), and 45.4 V maximum clamping voltage (V_C) at 110 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.

For engineers reviewing the 5KP28A-E3/73 datasheet, 5KP28A-E3/73 pinout, 5KP28A-E3/73 application, or 5KP28A-E3/73 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 175 °C max junction temperature, low incremental surge resistance, and RoHS-compliant matte tin-plated leads per J-STD-002.

Technical Context

This TVS diode uses a glass-passivated P600 chip junction to achieve fast response time and excellent clamping performance under repetitive 10/1000 μs transients. Its unidirectional structure provides forward conduction capability up to 100 A (V_F = 3.5 V) and withstands 600 A non-repetitive surge (8.3 ms half-sine).

Designed for output-stage protection in switching power supplies, it replaces crowbar circuits by limiting overvoltage without shorting-enabling circuit breaker tripping or fuse blowing while preserving system reset capability. Thermal management relies on lead temperature derating (P_D = 8.0 W at T_L = 75 °C) and requires adequate PCB copper area for heat dissipation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	28.0 V - Maximum continuous reverse operating voltage before breakdown; sets protection threshold above normal circuit rail.
V_BR min/max	31.1 V / 34.4 V at 5.0 mA - Verified breakdown range ensures reliable triggering across production lot and temperature.
V_C @ I_PPM	45.4 V at 110 A - Clamping voltage limits transient energy delivered to downstream components during 10/1000 μs surge.
P_PPM	5000 W - Peak pulse power handling enables robust protection against lightning-induced surges and inductive switch-offs.
I_FSM	600 A - Non-repetitive forward surge rating supports high-current fault events without bond wire failure.
T_J max	175 °C - High junction temperature rating allows operation in under-hood automotive and high-ambient industrial environments.
Polarity	Unidirectional - Provides forward conduction path; cathode marked by color band; not suitable for AC line protection without external rectification.

Pinout & Package

5KP28A-E3/73 is housed in a P600 molded epoxy package (9.5 mm × 8.6 mm × 3.4 mm) with axial leads. The device has two terminals: anode and cathode, with cathode identified by a colored band. Leads are matte tin-plated and solderable per J-STD-002.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / Reverse voltage reference	Connected to lower-potential side of protected circuit; defines directionality of clamping action.
Cathode	Clamping output / Surge current sink	Marked with color band; connected to higher-potential rail (e.g., V_OUT); conducts surge current to ground path during overvoltage.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration.
5000 W peak pulse power (10/1000 μs)	Enables single-device protection against ISO 7637-2 Pulse 5a/b (load dump) and IEC 61000-4-5 Level 4 surges without parallel staging.
Low incremental surge resistance	Minimizes V_C overshoot during fast-rising transients, improving protection margin for sensitive 3.3 V or 5 V logic interfaces.
UL 94 V-0 compliant molding compound	Ensures flame-retardant behavior in enclosed industrial enclosures and automotive junction boxes under fault conditions.
RoHS-compliant, JESD 201 Class 1A whisker tested	Meets global environmental compliance and long-term interconnect reliability requirements for high-reliability PCB assembly.

Applications

Automotive Power Supply Protection	Industrial Motor Drive DC Bus
Use Scenario: Protecting 24 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between V_BAT and chassis ground to clamp spikes up to 120 V within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in MCU power regulators and CAN transceivers by limiting clamped voltage to ≤45.4 V.	Use Scenario: Safeguarding IGBT gate drivers and current sense amplifiers on 400 V DC bus in variable frequency drives. IC Role / Device Role / Timing Role: Mounted across bus rails to absorb commutation spikes induced by fast-switching SiC MOSFETs. Use Value: Withstands 600 A surge (8.3 ms) and maintains clamping integrity at 175 °C ambient, enabling compact heatsink-less designs.
Telecom Power Rectifier Output	Consumer Appliance SMPS Secondary Side
Use Scenario: Shielding PoE-powered Ethernet PHYs and DC-DC controllers from ESD and lightning-induced surges on 48 V input rails. IC Role / Device Role / Timing Role: Unidirectional TVS installed after bridge rectifier to suppress differential-mode transients before bulk capacitor. Use Value: 45.4 V clamping voltage ensures safe operation of 50 V-rated electrolytic capacitors and 60 V MOSFETs downstream.	Use Scenario: Securing microcontroller reset lines and display backlight drivers in washing machines and HVAC controllers exposed to relay coil kickback. IC Role / Device Role / Timing Role: Low-leakage (≤2.0 μA at 28 V) TVS placed across 3.3 V or 5 V supply rails near noise-sensitive analog sections. Use Value: Sub-μA leakage preserves standby power budget; fast response prevents brownout-induced firmware corruption during relay switching.

Automotive Power Supply Protection

Industrial Motor Drive DC Bus

Use Scenario: Protecting 24 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5) and alternator ripple.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between V_BAT and chassis ground to clamp spikes up to 120 V within nanoseconds.

Use Value: Prevents latch-up or gate oxide damage in MCU power regulators and CAN transceivers by limiting clamped voltage to ≤45.4 V.

Use Scenario: Safeguarding IGBT gate drivers and current sense amplifiers on 400 V DC bus in variable frequency drives.

IC Role / Device Role / Timing Role: Mounted across bus rails to absorb commutation spikes induced by fast-switching SiC MOSFETs.

Use Value: Withstands 600 A surge (8.3 ms) and maintains clamping integrity at 175 °C ambient, enabling compact heatsink-less designs.

Telecom Power Rectifier Output

Consumer Appliance SMPS Secondary Side

Use Scenario: Shielding PoE-powered Ethernet PHYs and DC-DC controllers from ESD and lightning-induced surges on 48 V input rails.

IC Role / Device Role / Timing Role: Unidirectional TVS installed after bridge rectifier to suppress differential-mode transients before bulk capacitor.

Use Value: 45.4 V clamping voltage ensures safe operation of 50 V-rated electrolytic capacitors and 60 V MOSFETs downstream.

Use Scenario: Securing microcontroller reset lines and display backlight drivers in washing machines and HVAC controllers exposed to relay coil kickback.

IC Role / Device Role / Timing Role: Low-leakage (≤2.0 μA at 28 V) TVS placed across 3.3 V or 5 V supply rails near noise-sensitive analog sections.

Use Value: Sub-μA leakage preserves standby power budget; fast response prevents brownout-induced firmware corruption during relay switching.

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	Lower peak pulse power (600 W), smaller SMB package, same V_WM (28 V), higher V_C (45.7 V)	Suitable for space-constrained consumer electronics but insufficient for automotive load dump per ISO 7637-2.	Select SMBJ28A only when board area is critical and surge energy is limited to <100 mJ.
1.5KE27A	Same P600 package, lower peak power (1500 W), tighter V_BR tolerance (±5 %), lower V_C (43.0 V at 35 A)	Applicable for legacy industrial controls where 5000 W rating is unnecessary and cost sensitivity dominates.	Choose 1.5KE27A if design operates below 30 A surge currents and does not require AEC-Q101 qualification.

Compared with SMBJ28A and 1.5KE27A, the 5KP28A-E3/73 delivers 3.3× higher surge energy absorption than SMBJ28A and 3.3× greater peak current capacity than 1.5KE27A-making it the only option qualified for automotive under-hood deployment and capable of surviving repeated ISO 7637-2 Pulse 5 events without degradation.

Availability

5KP28A-E3/73 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial motor drive DC bus safeguarding, and telecom power rectifier output stabilization requiring stable component supply across multi-year production cycles.

Supply support for 5KP28A-E3/73 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, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.

The 5KP series was engineered specifically for high-energy transient suppression in switching power supply outputs-replacing crowbar circuits while enabling system reset after overvoltage events without component replacement.

FAQ

What is the clamping voltage of the 5KP28A-E3/73 under maximum rated surge current?

The 5KP28A-E3/73 exhibits 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 and guaranteed per JEDEC registered test conditions and directly determines the voltage stress imposed on downstream components during surge events. Maintaining V_C below the absolute maximum ratings of protected ICs is essential for reliable system-level immunity.

Is the 5KP28A-E3/73 suitable for automotive applications?

Yes, the 5KP28A-E3/73 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood engine control units and body electronics. Its 175 °C maximum junction temperature, robust P600 package, and ability to withstand repetitive ISO 7637-2 Pulse 5 load dump transients make it appropriate for demanding automotive environments. The "HE3" variant is fully AEC-Q101 qualified; the "E3" suffix denotes RoHS-compliant commercial grade with identical electrical specs.

What is the difference between the 5KP28A-E3/73 and the 5KP28AHE3/73?

The 5KP28A-E3/73 is RoHS-compliant and meets JESD 201 Class 1A whisker testing, while the 5KP28AHE3/73 adds full AEC-Q101 qualification for automotive applications. Both share identical electrical characteristics-including V_WM = 28.0 V, V_BR = 31.1–34.4 V, and V_C = 45.4 V-and use the same P600 package. The HE3 version undergoes additional stress testing (temperature cycling, mechanical shock, etc.) required for automotive qualification.

Can the 5KP28A-E3/73 be used in bidirectional protection circuits?

No, the 5KP28A-E3/73 is unidirectional only, with cathode marked by a color band. It conducts in forward bias and clamps reverse transients-but offers no protection against positive-going surges on the anode side. For bidirectional protection, two 5KP28A-E3/73 devices must be connected in series opposition, or a dedicated bidirectional TVS such as the 5KP28CA should be selected instead.

What is the maximum allowable lead temperature during soldering for the 5KP28A-E3/73?

The 5KP28A-E3/73 supports solder dip at a maximum temperature of 275 °C for up to 10 seconds, per JESD 22-B106. This specification applies to wave soldering processes. For reflow, peak temperature must remain within the limits defined by its epoxy molding compound's thermal stability-typically not exceeding 260 °C for ≤30 seconds. Exceeding these values risks delamination or internal junction damage.

5KP28A-E3/73 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Package/Case:: P600, Axial

Series:: TransZorb®

Packaging:: Tape & Box (TB)

Product Status:: Active

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-E3/73 FAQ

1.How can I place an order for 5KP28A-E3/73 through Aetrix?

Please submit a Request for Quotation (RFQ) for 5KP28A-E3/73 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-E3/73 reliable?

The price and inventory of 5KP28A-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5KP28A-E3/73 is usually 5 days.

3.What payment methods are accepted for 5KP28A-E3/73?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP28A-E3/73 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 5KP28A-E3/73?

5KP28A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 5KP28A-E3/73 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-E3/73?

For technical support, including 5KP28A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP28A-E3/73 requirements.

6.How does Aetrix verify that 5KP28A-E3/73 is sourced from the original manufacturer or authorized distributors?

All 5KP28A-E3/73 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-E3/73 meets industry standards.

7.What is the process for return or replacement of 5KP28A-E3/73?

All 5KP28A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP28A-E3/73, 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-E3/73 part is unused and in its original packaging.

Return procedure for 5KP28A-E3/73:

1.Submit a request within 90 days.

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

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