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Vishay General Semiconductor - Diodes Division 1.5KE12HE3/54
- Part No.:
- 1.5KE12HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE12HE3/54.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,655
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Product details
Overview
1.5KE12HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V maximum standoff voltage (VWM), and clamps transients to ≤16.7 V at 89.8 A peak pulse current (IPPM) under 10/1000 µs waveform. Used to safeguard MOSFETs, ICs, and sensor interfaces against ESD and inductive switching surges in industrial and automotive systems.
For engineers reviewing the 1.5KE12HE3/54 datasheet, 1.5KE12HE3/54 pinout, 1.5KE12HE3/54 application, or 1.5KE12HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), JEDEC 1.5KE package dimensions, and real-world clamping behavior - all critical for surge immunity validation and PCB-level TVS selection.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, delivering bidirectional-capable unidirectional clamping action. Its 1500 W peak pulse power rating (10/1000 µs) and low incremental surge resistance enable effective suppression of lightning-induced transients and load-switching spikes without thermal runaway.
It exhibits fast response time (<1 ns), 5.0 V forward voltage at 100 A (per spec note), and operates across –55 °C to +175 °C junction temperature range. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per revision B - validated for automotive-grade reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche initiation threshold for reliable triggering |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | ≤16.7 V at 89.8 A - clamping voltage during full-rated 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak surge power handling capability with 10/1000 µs waveform, duty cycle ≤0.01 % |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance, critical for derating above 25 °C ambient |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive or high-temp industrial enclosures |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports high-energy fault events |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, lead length 0.375" (9.5 mm). Dimensions: 5.3 mm × 4.8 mm × 9.5 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side of protected line; conducts during positive surge or forward bias |
| Cathode (banded end) | Avalanche clamping node | Connected to higher-potential side; initiates breakdown when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| AEC-Q101 qualified (HE3_B revision) | Validated for automotive applications including engine control, body electronics, and ADAS sensor protection |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 transients |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected FETs/ICs |
| Solderability per J-STD-002/JESD 22-B102 | Ensures reliable reflow and wave solder joint integrity in high-volume manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before reaching LDOs, microcontrollers, or CAN transceivers. Use Value: Limits voltage to ≤16.7 V during 89.8 A transients, preventing permanent damage to 20 V-rated input stages. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential signal pair or single-ended output to ground. Use Value: Sub-nanosecond response ensures clamping occurs before sensitive op-amp inputs saturate or fail. |
| DC Motor Drive Board Protection | Telecom Line Card Surge Suppression |
Use Scenario: Mitigating inductive kickback from brushed DC motors in robotics and HVAC actuators. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge supply rails to absorb flyback energy. Use Value: 1500 W rating handles repetitive 100+ A switching surges without degradation, extending board lifetime. | Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers on outdoor telecom equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection stage ahead of GDT or polymer PTC, absorbing initial high-energy impulse. Use Value: Clamps 10/1000 µs surges to <17 V, allowing secondary protection to handle residual energy with minimal let-through. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Lower peak power (400 W), smaller SMA package (RθJA = 110 °C/W), same VBR range | Suitable for space-constrained consumer electronics but insufficient for automotive load dump | Select only for low-energy, cost-sensitive designs where 1500 W headroom is unnecessary |
| 1.5KE12A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101 qualified) | Lacks automotive reliability validation; not approved for under-hood or safety-critical modules | Use where AEC-Q101 is not mandated, e.g., industrial control panels with controlled ambient |
Compared with 1.5KE12HE3/54, SMAJ12A trades surge capacity for footprint reduction, while 1.5KE12A-E3/54 retains identical clamping performance but omits automotive qualification - making 1.5KE12HE3/54 the sole choice when both high-power transient immunity and AEC-Q101 compliance are required.
Availability
1.5KE12HE3/54 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interface design, and telecom infrastructure projects requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5KE12HE3/54 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific performance.
The 1.5KE series was engineered for high-energy transient suppression in demanding environments, targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage tolerance of the 1.5KE12HE3/54?
The 1.5KE12HE3/54 has a specified breakdown voltage range of 11.4 V to 12.6 V at 1 mA test current, representing ±5 % tolerance around the nominal 12 V rating. This tight VBR window ensures consistent triggering behavior across production lots and enables predictable coordination with downstream overvoltage protection circuits. The value is measured per JEDEC standard and confirmed in Vishay's 88301 datasheet revision 09-Aug-2022.
Is the 1.5KE12HE3/54 suitable for bidirectional transient suppression?
No, the 1.5KE12HE3/54 is a unidirectional TVS diode - it protects against reverse-polarity surges only. Bidirectional variants use the "CA" suffix (e.g., 1.5KE12CA). The 1.5KE12HE3/54's cathode band indicates polarity, and its forward voltage is 3.5 V at 100 A; using it in bidirectional configurations would allow conduction during normal forward bias, risking failure. Always verify polarity alignment in circuit layout.
Does the 1.5KE12HE3/54 meet AEC-Q101 requirements?
Yes, the 1.5KE12HE3/54 carries the HE3 suffix with revision code "B", confirming full AEC-Q101 qualification per Vishay documentation. This includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating suitability for automotive powertrain, chassis, and body electronics. Qualification applies specifically to the HE3_B variant, not generic 1.5KE12A parts.
What is the maximum clamping voltage of the 1.5KE12HE3/54 at rated surge current?
The 1.5KE12HE3/54 clamps to a maximum of 16.7 V at its rated peak pulse current of 89.8 A (10/1000 µs waveform). This clamping voltage is guaranteed across temperature and lifetime, and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. It directly determines whether downstream components - such as 16 V-rated regulators or 20 V MOSFETs - remain within safe operating area.
How does the thermal resistance of the 1.5KE12HE3/54 affect its power derating?
The 1.5KE12HE3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, meaning each watt dissipated raises junction temperature by 75 °C above ambient. At 75 °C lead temperature, its power dissipation drops to 6.5 W (per Fig. 5); above 25 °C ambient, linear derating applies. Proper PCB copper pour and airflow are essential to maintain safe TJ ≤ 175 °C during repetitive surges - a key consideration in 1.5KE12HE3/54 layout design.
1.5KE12HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 86.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE12HE3/54 FAQ
1.How can I place an order for 1.5KE12HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12HE3/54 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 1.5KE12HE3/54 reliable?
The price and inventory of 1.5KE12HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE12HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12HE3/54?
1.5KE12HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12HE3/54 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 1.5KE12HE3/54?
For technical support, including 1.5KE12HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12HE3/54 requirements.
6.How does Aetrix verify that 1.5KE12HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE12HE3/54 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 1.5KE12HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE12HE3/54?
All 1.5KE12HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12HE3/54, 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 1.5KE12HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE12HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12HE3/54 Tags
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