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Vishay General Semiconductor - Diodes Division 1.5KA6.8AHE3/54
- Part No.:
- 1.5KA6.8AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA6.8AHE3/54.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
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Product details
Overview
1.5KA6.8AHE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in Case Style 1.5KA, rated for 1500 W peak pulse power (10/1000 µs), 6.45–7.14 V breakdown voltage at 10 mA, and 143 A peak pulse current. It operates from −65 °C to +185 °C and is AEC-Q101 qualified for engine control units and powertrain electronics.
For engineers reviewing the 1.5KA6.8AHE3/54 datasheet, 1.5KA6.8AHE3/54 pinout, 1.5KA6.8AHE3/54 application, or 1.5KA6.8AHE3/54 equivalent, key selection criteria include clamping voltage (10.5 V at 143 A), low incremental surge resistance, RoHS-compliant matte tin leads, and JESD201 Class 2 whisker resistance - critical for high-reliability automotive transients protection.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive surge stress and exhibits fast response time (<1 ns) with low dynamic impedance. Its unidirectional polarity and 5.80 V stand-off voltage enable robust protection of 5 V logic rails against load dump and inductive switching transients.
The device features a molded epoxy body meeting UL 94 V-0, solderable per J-STD-002 and JESD22-B102, and is rated for 200 A non-repetitive forward surge (8.3 ms half-sine). Thermal derating follows Fig. 2 and Fig. 5, supporting operation up to 185 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - withstands severe automotive load dump and ISO 7637-2 pulses without failure |
| Breakdown Voltage VBR | 6.45–7.14 V at 10 mA - ensures precise triggering above 5 V rail while avoiding false trips |
| Clamping Voltage VC | 10.5 V at 143 A - limits downstream voltage stress on protected ICs and MOSFETs |
| Stand-off Voltage VWM | 5.80 V - compatible with standard 5 V digital and analog circuits |
| Junction Temperature Range | −65 °C to +185 °C - supports under-hood automotive placement without thermal derating loss |
| AEC-Q101 Qualified | Yes - validated for automotive grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with cathode band marking; body length 1.0 in (25.4 mm), diameter 0.210 in (5.3 mm); leads 0.375 in (9.5 mm) long, matte tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit during reverse clamping | Connected to protected line (e.g., 5 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across temperature and lifetime, reducing parameter drift in harsh environments |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems without external heatsinking |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for sensitive gate drivers |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature automotive applications over 15+ year service life |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply input of engine control modules against battery load dump and alternator surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transients before they reach DC/DC converters and microcontrollers. Use Value: Clamps to 10.5 V at 143 A, preserving 5 V logic integrity and preventing latch-up in ASIL-B compliant ECUs. | Use Scenario: Shields LIN bus or analog sensor outputs (e.g., oxygen sensor, throttle position) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-ns ESD pulses on low-voltage signal lines without signal distortion. Use Value: 5.80 V stand-off avoids interference with 5 V sensor output range while clamping 8 kV contact ESD to safe levels. |
| Transmission Control Module (TCM) CAN Interface | Body Control Module (BCM) Lighting Driver Output |
Use Scenario: Guards CANH/CANL lines in transmission controllers exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each CAN line to clamp common-mode transients without affecting differential signaling. Use Value: Low capacitance (typ. <100 pF at VWM) preserves CAN FD signal integrity up to 5 Mbps. | Use Scenario: Protects high-side LED driver outputs in interior lighting against back-EMF from relay or motor loads sharing same harness. IC Role / Device Role / Timing Role: TVS shunts inductive spikes generated when adjacent 12 V loads switch off. Use Value: 200 A IFSM rating handles repeated relay coil de-energization without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8AHE3/52 | Lower peak pulse power (600 W), smaller SMB package (3.5 mm × 4.6 mm), same VBR range | Not AEC-Q101 qualified; suitable for consumer/industrial, not under-hood automotive | Select when space-constrained PCB layout and lower surge severity allow reduced power rating |
| 1.5KE6.8A | Same 1500 W rating and DO-201AD package, but non-automotive grade (no AEC-Q101, no HE3 suffix) | Lacks JESD201 Class 2 whisker resistance and high-temp reliability validation | Acceptable for cost-sensitive industrial designs where 185 °C operation and long-term whisker immunity are not required |
Compared with SMBJ6.8AHE3/52 and 1.5KE6.8A, the 1.5KA6.8AHE3/54 delivers verified AEC-Q101 compliance, 185 °C operation, and JESD201 Class 2 whisker resistance - essential for safety-critical automotive power domains where field failure risk must be minimized.
Availability
1.5KA6.8AHE3/54 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and automotive sensor interface circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KA6.8AHE3/54 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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The 1.5KA family was engineered specifically for AEC-Q101-compliant automotive transient suppression, emphasizing thermal stability, surge endurance, and long-term whisker resistance in under-hood environments.
FAQ
What is the clamping voltage of the 1.5KA6.8AHE3/54 at its rated peak pulse current?
The 1.5KA6.8AHE3/54 has a maximum clamping voltage (VC) of 10.5 V at 143 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry remains below critical overvoltage thresholds during automotive load dump events. The 1.5KA6.8AHE3/54 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA6.8AHE3/54 suitable for bidirectional transient protection?
No, the 1.5KA6.8AHE3/54 is unidirectional only, as confirmed by Vishay's documentation stating "Available in uni-directional polarity only." It must be installed with the cathode band toward the protected line and anode to ground. For bidirectional applications, a separate part number such as 1.5KA6.8CAHE3/54 would be required - the 1.5KA6.8AHE3/54 does not provide symmetrical clamping.
What does the HE3/54 suffix indicate for the 1.5KA6.8AHE3/54?
The HE3 suffix denotes RoHS-compliant, high-reliability automotive grade construction meeting AEC-Q101 qualification and JESD201 Class 2 whisker resistance. The /54 indicates packaging in 13" diameter paper tape and reel, with base quantity 1400 units per reel. This packaging format ensures automated SMT-compatible handling while maintaining traceability for automotive production lots.
How does the 1.5KA6.8AHE3/54 differ from the standard 1.5KA6.8A?
The 1.5KA6.8AHE3/54 includes the HE3 suffix, confirming it meets AEC-Q101, RoHS, and JESD201 Class 2 whisker test requirements - whereas the base 1.5KA6.8A lacks these qualifications. Both share identical electrical specs (VBR, VC, PPPM), but only the 1.5KA6.8AHE3/54 is approved for automotive safety-critical applications requiring long-term reliability under thermal cycling and humidity stress.
Can the 1.5KA6.8AHE3/54 be used in 24 V commercial vehicle systems?
The 1.5KA6.8AHE3/54 is specified for 12 V nominal systems, with 5.80 V stand-off and 10.5 V clamping - too low for direct use on 24 V rails. For 24 V applications, higher-voltage variants like 1.5KA24AHE3/54 (VWM = 20.5 V, VC = 33.2 V) are appropriate. Using the 1.5KA6.8AHE3/54 on 24 V would cause continuous conduction and thermal failure.
1.5KA6.8AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA6.8AHE3/54 FAQ
1.How can I place an order for 1.5KA6.8AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA6.8AHE3/54 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 1.5KA6.8AHE3/54 reliable?
The price and inventory of 1.5KA6.8AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA6.8AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA6.8AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA6.8AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA6.8AHE3/54?
1.5KA6.8AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA6.8AHE3/54 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 1.5KA6.8AHE3/54?
For technical support, including 1.5KA6.8AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA6.8AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA6.8AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA6.8AHE3/54 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 1.5KA6.8AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA6.8AHE3/54?
All 1.5KA6.8AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA6.8AHE3/54, 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 1.5KA6.8AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA6.8AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA6.8AHE3/54 Tags
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