My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA15AHE3/51
- Part No.:
- 1.5KA15AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA15AHE3/51.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:4,210
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA15AHE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-reliability clamping in power-line and signal-line surge protection. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 21.2 V under 70.8 A peak pulse current, and operates up to +185 °C junction temperature-ideal for protecting MOSFETs and sensor interfaces in automotive engine control units.
For engineers reviewing the 1.5KA15AHE3/51 datasheet, 1.5KA15AHE3/51 pinout, 1.5KA15AHE3/51 application, or 1.5KA15AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 14.3–15.8 V breakdown range, 12.8 V stand-off voltage, low 1.0 µA leakage at TJ = 150 °C, and PAR®-constructed epoxy package rated UL 94 V-0.
Technical Context
This TVS diode employs Vishay's patented PAR® (Planar Avalanche Rectifier) construction for stable avalanche breakdown and low incremental surge resistance. Its unidirectional polarity enables precise reverse-biased clamping with fast response time (<1 ns) and minimal voltage overshoot during ESD or load-dump transients.
Rated for automotive environments, it supports operation from –65 °C to +185 °C, features matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passes JESD201 Class 2 whisker testing-ensuring long-term solder joint integrity under thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients without failure in automotive load-dump events |
| Breakdown Voltage (VBR) | 14.3–15.8 V at 1.0 mA - defines reliable avalanche initiation threshold for clamping accuracy |
| Stand-off Voltage (VWM) | 12.8 V - maximum continuous reverse voltage before significant leakage begins |
| Clamping Voltage (VC) | 21.2 V at 70.8 A - actual voltage seen by protected circuit during worst-case surge |
| Junction Temperature Range | –65 °C to +185 °C - enables under-hood deployment in engine management systems |
| Surge Current (IPPM) | 70.8 A - peak current handled at rated clamping voltage under standard waveform |
| Leakage Current (ID) | 1.0 µA at VWM, TJ = 150 °C - ensures minimal standby power loss in hot environments |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 flammability rating; cathode denoted by color band; lead length 9.5 mm; RoHS-compliant matte tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / surge return node | Connected to ground or low-impedance return in unidirectional TVS configuration |
| Cathode | Clamping output / protected line interface | Connected to line being protected (e.g., 12 V rail or sensor signal); color-banded end |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables tight VBR tolerance (±5 %) and stable clamping across temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive use including HTOL, temperature cycling, and HTRB stress tests |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 10605 ESD) |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability, long-life automotive modules |
Applications
| Automotive Engine Control Unit (ECU) Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply input of engine control units against ISO 7637-2 load dump transients up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and DC/DC converter input. Use Value: Limits transient voltage to ≤21.2 V, preventing damage to downstream PMICs and microcontrollers while maintaining AEC-Q101 compliance. | Use Scenario: Shields analog outputs of pressure/temperature sensors in harsh industrial PLC I/O modules. IC Role / Device Role / Timing Role: Standoff-clamp protector on 4–20 mA or 0–10 V signal lines exposed to relay switching noise. Use Value: Clamps fast transients (<1 ns response) to <22 V while adding only 1.0 µA leakage at 125 °C-preserving signal integrity and measurement accuracy. |
| Automotive Body Control Module (BCM) LIN Bus Protection | Telecom Power Supply DC Input Protection |
Use Scenario: Safeguards LIN transceiver power pins against coupled surges from adjacent 12 V loads in door modules or lighting controllers. IC Role / Device Role / Timing Role: Local TVS on VCC rail of LIN PHY IC, placed within 2 cm of the IC bond pad. Use Value: Maintains 12.8 V stand-off to avoid false triggering during normal LIN bus operation while clamping to 21.2 V during surge events. | Use Scenario: Protects primary-side DC input of telecom AC/DC adapters subjected to lightning-induced surges on PoE or AC mains lines. IC Role / Device Role / Timing Role: First-stage clamping device upstream of bulk capacitor and active rectifier. Use Value: Absorbs 1500 W pulses without degradation, enabling compliance with IEC 61000-4-5 Level 4 (4 kV) when combined with series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/52 | Lower peak pulse power (400 W), SMA package (smaller footprint, lower thermal mass) | Not AEC-Q101 qualified; suitable for consumer/industrial, not automotive under-hood | Select when space-constrained and automotive qualification is unnecessary |
| 1.5KE15A | Same VBR range but TO-204AA (DO-201AE) package; no HE3 suffix or JESD201 Class 2 whisker rating | Lacks automotive reliability validation; higher thermal resistance limits sustained surge handling | Choose for cost-sensitive non-automotive designs where AEC-Q101 and whisker resistance are not required |
Compared with SMAJ15A-E3/52 and 1.5KE15A, the 1.5KA15AHE3/51 provides higher surge robustness (1500 W vs. 400 W or ~1000 W), guaranteed automotive qualification, and enhanced long-term interconnect reliability-making it the only option qualified for under-hood ECU power rail protection.
Availability
1.5KA15AHE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, and telecom power supply inputs requiring stable component supply, AEC-Q101 compliance, and high-temperature surge resilience.
Supply support for 1.5KA15AHE3/51 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 efficiency, and automotive-grade performance.
The 1.5KA family was engineered specifically for high-energy transient suppression in automotive and industrial power systems-delivering consistent clamping, extended temperature operation, and validated long-term reliability under thermal and mechanical stress.
FAQ
What is the breakdown voltage range of the 1.5KA15AHE3/51?
The 1.5KA15AHE3/51 has a specified breakdown voltage (VBR) range of 14.3 V to 15.8 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures predictable clamping onset in automotive 12 V systems and supports design margining against load-dump overvoltage events. The value is confirmed in Vishay Document Number 88300, Table on page 2.
Is the 1.5KA15AHE3/51 qualified for automotive applications?
Yes, the 1.5KA15AHE3/51 is explicitly AEC-Q101 qualified, as noted in the "Notes" section of Vishay Document Number 88300 (page 3). It meets stress test requirements for high-temperature operating life, temperature cycling, and highly accelerated stress testing-making it suitable for under-hood engine control units and body electronics where reliability is critical.
What is the clamping voltage of the 1.5KA15AHE3/51 at its rated peak pulse current?
The 1.5KA15AHE3/51 clamps to a maximum of 21.2 V at its rated peak pulse current of 70.8 A (10/1000 µs waveform), as specified in the Electrical Characteristics table (page 2 of Document 88300). This clamping level protects downstream components such as microcontrollers and gate drivers while remaining compatible with 24 V system headroom margins.
Does the 1.5KA15AHE3/51 have RoHS and lead-free compliance?
Yes, the 1.5KA15AHE3/51 carries the HE3 suffix, indicating full RoHS compliance per Directive 2002/95/EC and WEEE compliance per 2002/96/EC. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the molding compound is UL 94 V-0 rated-verified in the Mechanical Data section of Vishay Document 88300.
What is the maximum junction temperature rating for the 1.5KA15AHE3/51?
The 1.5KA15AHE3/51 is rated for a maximum junction temperature (TJ) of +185 °C, with an operating and storage range of –65 °C to +185 °C. This high-temperature capability is essential for placement near heat sources in automotive ECUs and industrial motor drives, and is documented in the Maximum Ratings table (page 1 of Document 88300).
1.5KA15AHE3/51 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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
1.5KA15AHE3/51 FAQ
1.How can I place an order for 1.5KA15AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA15AHE3/51 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 1.5KA15AHE3/51 reliable?
The price and inventory of 1.5KA15AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA15AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA15AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA15AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA15AHE3/51?
1.5KA15AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA15AHE3/51 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 1.5KA15AHE3/51?
For technical support, including 1.5KA15AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA15AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA15AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA15AHE3/51 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 1.5KA15AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA15AHE3/51?
All 1.5KA15AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA15AHE3/51, 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 1.5KA15AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA15AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA15AHE3/51 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
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…
