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Vishay General Semiconductor - Diodes Division 5KP8.5A-E3/51
- Part No.:
- 5KP8.5A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- P600, Axial
- Datasheet:
-
5KP8.5A-E3/51.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC P600
- Quantity:
- Payment:
- Shipping:
Inventory:6,279
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Product details
Overview
5KP8.5A-E3/51 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in P600 package, designed for high-energy surge protection of DC power rails and signal lines. It features 5000 W peak pulse power (10/1000 μs), 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR at 5.0 mA), and clamps to ≤14.4 V at 347 A peak pulse current - used in automotive power supply outputs and industrial sensor interfaces.
For engineers reviewing the 5KP8.5A-E3/51 datasheet, 5KP8.5A-E3/51 pinout, 5KP8.5A-E3/51 application, or 5KP8.5A-E3/51 equivalent, key selection criteria include unidirectional polarity, 50 μA max reverse leakage at VWM, AEC-Q101 qualification, 175 °C max junction temperature, and P600 package thermal performance under repetitive surge conditions.
Technical Context
This TVS diode operates as a voltage-clamping overvoltage protector with glass-passivated P-N junction and molded epoxy case (UL 94 V-0). Its response time is sub-nanosecond, enabling suppression of fast transients induced by inductive switching or ESD events on 12 V and 24 V automotive power buses.
The device uses a single-junction, unidirectional structure optimized for crowbar-replacement applications in switching power supplies. It sustains 600 A non-repetitive forward surge (8.3 ms half-sine) and exhibits low incremental surge resistance for stable clamping under high-current stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 9.44 V / 10.4 V at 5.0 mA - guaranteed breakdown threshold defining turn-on precision |
| VC @ IPPM | ≤14.4 V at 347 A - clamping voltage limiting downstream component stress during 10/1000 μs surge |
| PPPM | 5000 W - peak pulse power handling capability per JEDEC standard waveform |
| IFSM | 600 A - maximum non-repetitive forward surge current (8.3 ms half-sine) |
| TJ max. | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - cathode-banded configuration for DC rail protection only (no AC or bidirectional use) |
Pinout & Package
Package: P600 - axial-leaded, molded epoxy body (9.5 mm length × 6.2 mm diameter), UL 94 V-0 rated, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode identified by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Current entry point during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Current exit point during forward conduction; reverse-blocking terminal | Connected to protected line (e.g., +12 V rail); clamps when voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| 5000 W peak pulse power (10/1000 μs) | Enables single-device protection against ISO 7637-2 Pulse 5a/b (load dump) on 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage margin between breakdown and clamping - critical for protecting 12 V-rated ICs |
| 175 °C junction rating | Supports placement near heat-generating components (e.g., power MOSFETs, inductors) without derating |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU with lead-free matte tin plating and whisker-resistant JESD 201 Class 1A finish |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump transients (ISO 7637-2 Pulse 5) and alternator overshoot. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed across input rail upstream of DC/DC converter. Use Value: Clamps 5000 W surges to ≤14.4 V, preventing damage to downstream regulators and microcontrollers rated for 16 V absolute max. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from cable-induced ESD and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional shunt protector on 24 V sensor supply line, located at connector entry point. Use Value: Sub-nanosecond response limits transient duration, preserving signal integrity while sustaining 347 A peak current without degradation. |
| Switching Power Supply Output Crowbar Replacement | Telecom DC Feeder Line Protection |
Use Scenario: Replacing SCR-based crowbar circuits in 48 V telecom rectifiers to avoid latch-up and enable automatic recovery after overvoltage events. IC Role / Device Role / Timing Role: Self-resetting overvoltage clamp on secondary-side output, triggered only during fault conditions. Use Value: Withstands repeated 8.3 ms surges up to 600 A, allowing circuit breakers to trip while maintaining system uptime after fault clearance. | Use Scenario: Protecting PoE-powered devices (e.g., IP cameras, wireless APs) connected to outdoor-rated DC feeder cables exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 57 V DC feed line, coordinated with secondary-side protection. Use Value: 5000 W rating handles IEC 61000-4-5 Combination Wave (10/700 μs) energy with <14.4 V clamping, reducing need for multi-stage designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | Lower peak power (600 W), SMC package, same VWM/VBR range | Not suitable for ISO 7637-2 Pulse 5; limited to board-level ESD and lower-energy transients | Select when space-constrained PCB layout requires surface-mount and surge energy is ≤600 W |
| 1.5KE8.5A | Same P600 package but lower peak power (1500 W), higher VC (13.4 V), older platform | Insufficient for automotive load dump; acceptable for legacy industrial power supplies with lower surge requirements | Choose only if cost sensitivity outweighs robustness needs and 1500 W rating meets system test profile |
Compared with SMBJ8.5A and 1.5KE8.5A, the 5KP8.5A-E3/51 delivers 3.3× higher peak power than SMBJ8.5A and >3× higher than 1.5KE8.5A, enabling single-device compliance with automotive load dump standards while maintaining identical mounting footprint and cathode-band polarity identification.
Availability
5KP8.5A-E3/51 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, switching power supply outputs, and telecom DC feeder lines requiring stable component supply and AEC-Q101-qualified surge protection.
Supply support for 5KP8.5A-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, MOSFETs, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 5KP series was engineered specifically for high-energy transient suppression in automotive and industrial power systems, targeting replacement of crowbar circuits and compliance with ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the maximum clamping voltage of the 5KP8.5A-E3/51 under peak surge conditions?
The 5KP8.5A-E3/51 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 347 A using the 10/1000 μs waveform. This value is guaranteed per JEDEC test conditions and ensures downstream 12 V-rated ICs remain within safe operating limits during transient events.
Is the 5KP8.5A-E3/51 suitable for automotive applications?
Yes, the 5KP8.5A-E3/51 is AEC-Q101 qualified and explicitly designed for automotive use, including protection against load dump transients (ISO 7637-2 Pulse 5) on 12 V battery rails. Its 175 °C junction rating and robust P600 package support under-hood deployment in engine control units and body electronics modules.
What does the "E3" suffix indicate in 5KP8.5A-E3/51?
"E3" denotes RoHS-compliant construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance requirements. It confirms compliance with EU Directive 2011/65/EU and suitability for lead-free reflow and wave soldering processes per J-STD-002 and JESD 22-B102 standards.
How does the 5KP8.5A-E3/51 differ from the 1.5KE8.5A in practical design use?
The 5KP8.5A-E3/51 provides 5000 W peak pulse power versus 1500 W for the 1.5KE8.5A, enabling compliance with automotive load dump standards where the latter fails. Both share P600 packaging and unidirectional polarity, but the 5KP8.5A-E3/51's lower clamping ratio (14.4 V vs. 13.4 V) and higher IPPM (347 A vs. 113 A) make it suitable for more demanding surge environments.
Can the 5KP8.5A-E3/51 be used in bidirectional configurations?
No - the 5KP8.5A-E3/51 is unidirectional only, as confirmed by Vishay documentation. It conducts in forward bias and clamps in reverse bias above VWM. For AC or bidirectional transient protection, a separate back-to-back pair or a dedicated bidirectional TVS (e.g., 5KP8.5CA) must be used; substituting this part in AC applications risks catastrophic failure.
5KP8.5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 347A
- 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
5KP8.5A-E3/51 FAQ
1.How can I place an order for 5KP8.5A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 5KP8.5A-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 5KP8.5A-E3/51 reliable?
The price and inventory of 5KP8.5A-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 5KP8.5A-E3/51 is usually 5 days.
3.What payment methods are accepted for 5KP8.5A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5KP8.5A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5KP8.5A-E3/51?
5KP8.5A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5KP8.5A-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 5KP8.5A-E3/51?
For technical support, including 5KP8.5A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5KP8.5A-E3/51 requirements.
6.How does Aetrix verify that 5KP8.5A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 5KP8.5A-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 5KP8.5A-E3/51 meets industry standards.
7.What is the process for return or replacement of 5KP8.5A-E3/51?
All 5KP8.5A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 5KP8.5A-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 5KP8.5A-E3/51 part is unused and in its original packaging.
Return procedure for 5KP8.5A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
5KP8.5A-E3/51 Tags
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