My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA6.8HE3/73
- Part No.:
- 1.5KA6.8HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA6.8HE3/73.pdf
- Description:
- TVS DIODE 5.5VWM 10.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,062
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA6.8HE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at ≤10.8 V under 139 A surge, and operates from –65 °C to +185 °C junction temperature - deployed in engine control units, ABS modules, and sensor interface circuits.
For engineers reviewing the 1.5KA6.8HE3/73 datasheet, 1.5KA6.8HE3/73 pinout, 1.5KA6.8HE3/73 application, or 1.5KA6.8HE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 6.12–7.48 V breakdown range at 10 mA, 5.5 V stand-off voltage, 1000 µA max reverse leakage at VWM, and 139 V clamping voltage at rated IPPM - all critical for robust automotive ESD/surge immunity design.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable high-temperature operation and low incremental surge resistance. Its unidirectional polarity enables DC rail protection with fast response (<1 ns) and minimal capacitance (typ. <100 pF at 1 MHz), supporting reliable suppression of inductive switching transients and ISO 7637-2 pulse 1/2a/3a events.
Rated for 200 A non-repetitive forward surge (8.3 ms half-sine), it maintains clamping performance up to 185 °C junction temperature and meets RoHS 2002/95/EC and WEEE 2002/96/EC. The HE3 suffix confirms JESD201 Class 2 whisker resistance and automotive-grade reliability per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump and inductive kick energy without failure |
| Breakdown Voltage VBR | 6.12–7.48 V at 10 mA - defines precise conduction threshold for early clamping |
| Stand-off Voltage VWM | 5.5 V - ensures no conduction during normal 5 V system operation |
| Clamping Voltage VC | 10.8 V at 139 A - limits downstream IC stress to safe levels during surge |
| Operating Temperature Range | –65 °C to +185 °C - supports under-hood placement in modern powertrain electronics |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and surge endurance |
| RoHS & Whisker Compliance | HE3 suffix: RoHS-compliant, JESD201 Class 2 tin whisker resistant |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with matte tin-plated leads; cathode indicated by color band; molded epoxy body rated UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Completes clamping path during reverse-biased surge event |
| Cathode | High-side connection to protected line (e.g., battery rail) | Accepts transient energy and conducts to ground when VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR drift <±5 % over 1000 hrs at 150 °C, critical for long-life automotive modules |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (load dump) up to 40 V without degradation |
| Low clamping ratio (VC/VBR ≈ 1.7) | Minimizes voltage overshoot during fast transients, protecting 5 V logic interfaces |
| AEC-Q101 qualification | Covers HTGB, HTRB, TCT, and surge testing - eliminates need for additional qualification effort |
| Solderability & reliability | Meets J-STD-002/JESD22-B102; 260 °C solder dip (40 s); JESD201 Class 2 whisker resistance |
Applications
| Engine Control Unit (ECU) Power Input Protection | ABS Module Sensor Line Protection |
|---|---|
Use Scenario: Protects 12 V supply input of diesel/gasoline ECUs against alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Primary unidirectional TVS clamp placed upstream of DC/DC converter input. Use Value: Limits transient voltage to ≤10.8 V, preventing damage to LDOs and microcontrollers rated for 16 V absolute max. |
Use Scenario: Shields analog front-end inputs of wheel speed sensors from inductive coupling in brake actuator wiring harnesses. IC Role / Device Role / Timing Role: Signal-line TVS on differential CAN or PWM sensor outputs exposed to chassis ground noise. Use Value: Clamps sub-100 ns spikes to <139 V while adding <100 pF capacitance - preserving signal integrity up to 1 MHz. |
| Automotive Infotainment Power Rail | Body Control Module (BCM) LIN Bus Protection |
Use Scenario: Guards 5 V/3.3 V power domains feeding display drivers and audio codecs against battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Secondary TVS after main fuse, co-located with bulk capacitors near SoC power pins. Use Value: Withstands 200 A surge (8.3 ms) without parametric shift, ensuring uninterrupted operation during cold-crank recovery. |
Use Scenario: Installed on LIN bus lines between door module and central gateway to suppress ESD and board-level transients. IC Role / Device Role / Timing Role: Unidirectional TVS tied between LIN+ and ground, leveraging low VWM (5.5 V) to avoid interfering with 12 V dominant state. Use Value: Provides ±30 kV contact ESD immunity per IEC 61000-4-2 while maintaining LIN signaling margins (≥7 V recessive, ≤12 V dominant). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8AHE3/52 | Lower PPPM (600 W), smaller SMB package (JEDEC DO-214AA), tighter VBR tolerance (6.45–7.14 V) | Better suited for space-constrained PCBs; lower surge capacity limits use to non-load-dump scenarios | Select when footprint and cost are prioritized over 1500 W capability and under-hood thermal margin |
| 1.5KE6.8A | Same 1500 W rating but non-automotive grade; lacks AEC-Q101, JESD201 whisker test, and 185 °C TJ rating | Restricted to industrial/commercial environments; not qualified for automotive production | Use only in non-automotive designs where full AEC-Q101 compliance is not required |
Compared with SMBJ6.8AHE3/52 and 1.5KE6.8A, the 1.5KA6.8HE3/73 uniquely combines AEC-Q101 qualification, 185 °C operation, and 1500 W capability in a through-hole package - making it the sole choice for high-reliability automotive power rail protection where thermal derating and long-term stability are mandatory.
Availability
1.5KA6.8HE3/73 is available at Aetrix Electronics and suitable for engine control units, ABS modules, and infotainment systems requiring stable component supply across extended automotive lifecycles and temperature ranges.
Supply support for 1.5KA6.8HE3/73 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal stability, surge endurance, and long-term parametric consistency under repeated stress.
FAQ
What is the clamping voltage of the 1.5KA6.8HE3/73 under maximum rated surge current?
The 1.5KA6.8HE3/73 exhibits a maximum clamping voltage (VC) of 10.8 V when subjected to its rated peak pulse current of 139 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that protected downstream circuitry sees no more than 10.8 V during worst-case surge events - essential for safeguarding 5 V logic and analog ICs in automotive applications.
Is the 1.5KA6.8HE3/73 suitable for bidirectional transient protection?
No, the 1.5KA6.8HE3/73 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping behavior, and leakage - are specified only for reverse-bias conduction. For bidirectional protection (e.g., AC lines or data buses), a dedicated bidirectional device such as the 1.5SMC6.8CAHE3 must be used instead of the 1.5KA6.8HE3/73.
Does the 1.5KA6.8HE3/73 meet AEC-Q101 requirements for automotive use?
Yes, the 1.5KA6.8HE3/73 is explicitly qualified to AEC-Q101 standards, as confirmed in the Vishay datasheet (Document Number 88300, Revision 20-Oct-08) and supported by its HE3 suffix designation. It passes stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), temperature cycling (TCT), and surge endurance - validating its suitability for production automotive electronics.
What is the maximum operating junction temperature for the 1.5KA6.8HE3/73?
The 1.5KA6.8HE3/73 has a maximum operating junction temperature (TJ) of +185 °C, significantly exceeding standard industrial-grade TVS diodes. This rating enables reliable deployment in under-hood locations - such as near engine manifolds or transmission control units - where ambient temperatures exceed 125 °C and thermal derating must be minimized.
How does the HE3 suffix affect the reliability of the 1.5KA6.8HE3/73?
The HE3 suffix on the 1.5KA6.8HE3/73 indicates compliance with JESD201 Class 2 whisker resistance, RoHS 2002/95/EC, and automotive-grade reliability per AEC-Q101. It certifies that the matte tin-plated leads resist tin whisker growth under thermal/humidity stress - a critical requirement for long-life automotive modules where latent field failures must be eliminated.
1.5KA6.8HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 139A
- 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
1.5KA6.8HE3/73 FAQ
1.How can I place an order for 1.5KA6.8HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA6.8HE3/73 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 1.5KA6.8HE3/73 reliable?
The price and inventory of 1.5KA6.8HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA6.8HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA6.8HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA6.8HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA6.8HE3/73?
1.5KA6.8HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA6.8HE3/73 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 1.5KA6.8HE3/73?
For technical support, including 1.5KA6.8HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA6.8HE3/73 requirements.
6.How does Aetrix verify that 1.5KA6.8HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA6.8HE3/73 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 1.5KA6.8HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA6.8HE3/73?
All 1.5KA6.8HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA6.8HE3/73, 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 1.5KA6.8HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA6.8HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA6.8HE3/73 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
