My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA12AHE3/51
- Part No.:
- 1.5KA12AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA12AHE3/51.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,498
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA12AHE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-reliability circuit protection. It features a 12 V nominal breakdown voltage (11.4–12.6 V), 1500 W peak pulse power (10/1000 µs), 89.8 A peak pulse current, 16.7 V maximum clamping voltage at IPPM, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA12AHE3/51 datasheet, 1.5KA12AHE3/51 pinout, 1.5KA12AHE3/51 application, or 1.5KA12AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, junction temperature derating above 25 °C, RoHS-compliant matte tin leads, and compatibility with JESD201 Class 2 whisker resistance requirements.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable high-temperature operation up to TJ = 185 °C and low incremental surge resistance. Its unidirectional polarity and 1.0 mA test current ensure precise breakdown voltage control across the full operating temperature range.
The device delivers consistent clamping behavior during repetitive 10/1000 µs surges, with thermal derating defined per Figure 2 and mechanical robustness validated via 260 °C solder dip (40 s). It meets UL 94 V-0 flammability and AEC-Q101 stress test requirements for automotive powertrain and body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 11.4–12.6 V at IT = 1.0 mA - defines precise overvoltage triggering threshold for protection circuits |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - sustains high-energy transients without failure in automotive load-dump scenarios |
| Clamping Voltage VC | 16.7 V at IPPM = 89.8 A - limits downstream voltage stress on protected ICs and MOSFETs |
| Stand-off Voltage VWM | 10.2 V - ensures no conduction during normal 12 V system operation, minimizing leakage |
| Max Reverse Leakage ID | 2.0 µA at VWM, TJ = 150 °C - maintains low standby power loss in high-temp environments |
| Junction Temp Range | −65 °C to +185 °C - supports under-hood placement in engine control units and ADAS sensors |
| AEC-Q101 Qualified | Yes - certified for automotive applications requiring reliability validation per stress test standards |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with molded epoxy body, UL 94 V-0 rating, and cathode indicated by color band. Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); color band identifies this terminal |
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) without degradation when mounted per JEDEC standards |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, eliminating latent short-circuit risk in sealed enclosures |
| RoHS-compliant HE3 suffix | Meets EU Directive 2002/95/EC and WEEE 2002/96/EC with no exemptions required for lead-free assembly |
| Low clamping ratio VC/VBR | 1.47 (16.7 V / 11.4 V) - minimizes overvoltage margin while maintaining robust surge margin |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Protection of 12 V supply inputs against load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamps voltage spikes to ≤16.7 V, shielding microcontrollers and CAN transceivers. Use Value: Prevents latch-up or gate oxide damage in protected ICs during 120 V/400 ms load-dump events per ISO 7637-2. |
Use Scenario: Guarding 24 V DC sensor input lines against inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Fast-response TVS diverts surge energy before it reaches signal-conditioning op-amps and ADC front-ends. Use Value: Maintains measurement integrity by limiting transient-induced offset errors and preventing ADC saturation. |
| Telecom Power Supply Input | Automotive Body Control Module (BCM) |
Use Scenario: Safeguarding primary-side rectifier outputs in telecom AC/DC adapters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-power TVS absorbs 1500 W pulses without thermal runaway, preserving upstream bridge rectifiers. Use Value: Eliminates need for secondary-stage MOVs, reducing BOM count and improving surge response time. |
Use Scenario: Shielding LIN bus transceivers and window motor drivers from battery reverse-polarity and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5KA12AHE3/51 handles positive-going surges on 12 V rails. Use Value: Enables compact layout with single-device protection per power domain, verified per AEC-Q101 HTRB testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12AHE3/52 | Lower PPPM (600 W), SMB package (smaller footprint, lower thermal mass) | Suitable for space-constrained consumer electronics; insufficient for automotive load-dump compliance | Select only if peak surge energy ≤600 W and board area is critical; verify thermal dissipation with PCB copper pour |
| 1.5KE12A | Same 1500 W rating but non-automotive grade; lacks AEC-Q101 qualification and JESD201 whisker testing | Acceptable for industrial controls with ambient <125 °C; not approved for OEM automotive production | Use where cost is prioritized over automotive certification; requires separate reliability validation for automotive programs |
Compared with SMBJ12AHE3/52 and 1.5KE12A, the 1.5KA12AHE3/51 uniquely combines AEC-Q101 qualification, 1500 W capability, and DO-201AD mechanical robustness-making it the only choice for production automotive ECUs requiring zero field failures under load-dump stress.
Availability
1.5KA12AHE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and telecom power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KA12AHE3/51 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 high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V and 24 V automotive systems, emphasizing thermal stability, surge endurance, and process-controlled VBR consistency.
FAQ
What is the clamping voltage of the 1.5KA12AHE3/51 at its rated peak pulse current?
The 1.5KA12AHE3/51 has a maximum clamping voltage (VC) of 16.7 V when subjected to its peak pulse current (IPPM) of 89.8 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and guarantees predictable overvoltage limiting for downstream components such as microcontrollers and power MOSFETs. The 1.5KA12AHE3/51 maintains this clamping performance across its full operating temperature range, with derating curves provided in Figure 2 of the datasheet.
Is the 1.5KA12AHE3/51 qualified for automotive use?
Yes, the 1.5KA12AHE3/51 is AEC-Q101 qualified and designated as an automotive-grade part (HE3 suffix). It undergoes rigorous stress testing including high-temperature reverse bias, temperature cycling, and humidity bias life testing per AEC-Q101 requirements. The 1.5KA12AHE3/51 is approved for use in engine control units, body control modules, and other under-hood applications where reliability at junction temperatures up to +185 °C is mandatory.
What does the HE3 suffix indicate on the 1.5KA12AHE3/51?
The HE3 suffix on the 1.5KA12AHE3/51 denotes RoHS compliance, high-reliability construction, and qualification to JESD201 Class 2 for tin whisker resistance. It confirms that the matte tin-plated leads meet automotive-grade solderability standards (J-STD-002) and have passed 1000-hour biased humidity testing. The 1.5KA12AHE3/51 HE3 variant is specifically intended for automotive and industrial applications requiring long-term metallurgical stability.
How does the 1.5KA12AHE3/51 differ from the standard 1.5KA12A?
The 1.5KA12AHE3/51 includes the HE3 suffix, indicating RoHS compliance, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance-features absent in the base 1.5KA12A. Electrically, both share identical VBR (11.4–12.6 V), VC (16.7 V), and PPPM (1500 W) specifications. However, the 1.5KA12AHE3/51 is screened and tested to automotive reliability standards, making it suitable for OEM production where the 1.5KA12A is restricted to commercial or industrial use.
What is the maximum operating junction temperature for the 1.5KA12AHE3/51?
The 1.5KA12AHE3/51 has a maximum operating junction temperature (TJ max.) of +185 °C, enabling deployment in high-temperature automotive environments such as near engines or in power inverters. Its thermal performance is supported by a power dissipation rating of 6.5 W on an infinite heatsink at TL = 75 °C, with linear derating above 25 °C per Figure 2. This allows the 1.5KA12AHE3/51 to remain functional and protective even during sustained high-ambient conditions typical in modern vehicle architectures.
1.5KA12AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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
1.5KA12AHE3/51 FAQ
1.How can I place an order for 1.5KA12AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA12AHE3/51 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 1.5KA12AHE3/51 reliable?
The price and inventory of 1.5KA12AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA12AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA12AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA12AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA12AHE3/51?
1.5KA12AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA12AHE3/51 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 1.5KA12AHE3/51?
For technical support, including 1.5KA12AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA12AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA12AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA12AHE3/51 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 1.5KA12AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA12AHE3/51?
All 1.5KA12AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA12AHE3/51, 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 1.5KA12AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA12AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA12AHE3/51 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
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 …
