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Vishay General Semiconductor - Diodes Division 1.5KE12AHE3/51
- Part No.:
- 1.5KE12AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE12AHE3/51.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,389
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Product details
Overview
1.5KE12AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 11.4 V minimum breakdown voltage (VBR), 10.2 V maximum stand-off voltage (VWM), 16.7 V clamping voltage (VC) at 89.8 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification - deployed in automotive engine control units to safeguard microcontrollers against load dump transients.
For engineers reviewing the 1.5KE12AHE3/51 datasheet, 1.5KE12AHE3/51 pinout, 1.5KE12AHE3/51 application, or 1.5KE12AHE3/51 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, polarity marking guidance, thermal derating behavior, and direct alternative options with documented functional trade-offs for ESD and surge protection design.
Technical Context
This uni-directional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below VWM = 10.2 V and transitions rapidly (<1 ns) into low-impedance conduction above VBR = 11.4–12.6 V to divert transient energy. Its glass-passivated junction ensures stable leakage (<5 µA at VWM) and repeatable clamping performance across temperature.
The device complies with AEC-Q101 stress testing for automotive use and supports soldering per J-STD-002/JESD 22-B102, with matte tin-plated leads qualified to JESD 201 Class 2 whisker resistance. Thermal resistance is RθJA = 75 °C/W and RθJL = 15.4 °C/W, enabling effective heat dissipation through PCB copper pours or lead-frame conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V - defines precise voltage threshold at which clamping begins under 1 mA test current |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VC @ IPPM | 16.7 V at 89.8 A - clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak transient power handling capability without failure (duty cycle ≤ 0.01 %) |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for load-dump survival |
| TJ max | +175 °C - maximum junction temperature, supporting under-hood automotive placement |
| Leakage @ VWM | ≤5 µA - ensures minimal standby power loss and signal integrity in always-on circuits |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0. Cathode indicated by color band; leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of protected line (e.g., GND or return path) |
| Cathode | Reverse-biased clamping node | Connected to higher-potential side (e.g., +12 V rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %) and low parameter drift over 1000+ surge cycles |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive ISO 7637-2 Pulse 5a (load dump) without degradation when properly heatsinked |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV) |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts), improving clamping precision |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal/humidity stress, ensuring long-term solder joint integrity |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control modules from ISO 7637-2 load dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Shunt clamping element placed directly across input rail and ground, responding within <1 ns to limit voltage excursion. Use Value: Clamps peak voltage to ≤16.7 V at 89.8 A, preventing damage to downstream LDOs and MCU power pins rated for 16 V absolute maximum. |
Use Scenario: Safeguarding analog outputs of pressure sensors in factory automation PLC I/O modules exposed to relay coil flyback. IC Role / Device Role / Timing Role: Uni-directional TVS connected anode-to-ground, cathode-to-signal line, suppressing negative-going transients. Use Value: Limits reverse voltage to ≤10.2 V stand-off while clamping positive surges to 16.7 V, preserving ADC input stage integrity. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Protection |
Use Scenario: Secondary protection on VBUS line of USB 2.0 host ports subjected to IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Standby-mode shunt suppressor activated only during ESD events; low leakage avoids USB enumeration issues. Use Value: 5 µA max leakage at 10.2 V ensures compliance with USB 2.0 VBUS idle current limits (<100 µA). |
Use Scenario: Primary surge protection on -48 V telecom battery feed lines facing lightning-induced surges per ITU-T K.20. IC Role / Device Role / Timing Role: Mounted between tip/ring and ground on line card front-end, absorbing multi-kA impulses. Use Value: 1500 W rating enables single-device handling of 10/1000 µs surges up to 89.8 A, reducing component count vs. stacked TVS arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Lower PPPM (600 W), smaller SMB package (RθJA = 110 °C/W), same VBR range (11.4–12.6 V) | Not AEC-Q101 qualified; suited for space-constrained consumer electronics, not under-hood automotive | Select SMBJ12A only if board area is critical and surge energy is ≤600 W; verify thermal margin with layout simulation. |
| 1.5KE12CA | Bi-directional variant (VBR = 11.4–12.6 V, VC = 19.9 V @ 75.5 A), same 1500 W rating and AEC-Q101 qualification | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose 1.5KE12CA when protecting differential buses or unidirectional lines subject to reverse polarity faults; note higher VC. |
Compared with SMBJ12A, 1.5KE12AHE3/51 delivers 2.5× higher surge power handling and automotive qualification but requires more PCB area; versus 1.5KE12CA, it offers tighter clamping (16.7 V vs. 19.9 V) for DC rails but cannot protect bidirectional signals.
Availability
1.5KE12AHE3/51 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer USB power delivery, and telecom line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE12AHE3/51 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 passive components for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for robust, high-energy transient suppression in harsh environments - emphasizing AEC-Q101 compliance, stable clamping, and repeatable surge endurance in automotive power systems.
FAQ
What is the exact breakdown voltage range for 1.5KE12AHE3/51?
The 1.5KE12AHE3/51 has a guaranteed breakdown voltage (VBR) range of 11.4 V to 12.6 V at 1 mA test current, measured per JEDEC standard. This tight 5 % tolerance ensures predictable clamping onset across production lots and temperature extremes, making 1.5KE12AHE3/51 suitable for designs where overvoltage margin must be precisely controlled.
Is 1.5KE12AHE3/51 suitable for automotive applications?
Yes, 1.5KE12AHE3/51 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its +175 °C maximum junction temperature, JESD 201 Class 2 whisker resistance, and validated performance under load dump (ISO 7637-2 Pulse 5a) confirm suitability for engine control units, body controllers, and ADAS power supplies.
How does the clamping voltage of 1.5KE12AHE3/51 compare to its stand-off voltage?
The 1.5KE12AHE3/51 has a maximum stand-off voltage (VWM) of 10.2 V and a maximum clamping voltage (VC) of 16.7 V at 89.8 A. This 6.5 V differential provides a reliable safety margin for 12 V nominal systems, ensuring downstream ICs see no more than 16.7 V during worst-case transients while remaining fully inactive during normal operation.
What packaging and marking does 1.5KE12AHE3/51 use?
The 1.5KE12AHE3/51 uses JEDEC DO-201AD (Case Style 1.5KE) packaging with axial leads. It is marked with "12A" and a cathode band; the "HE3/51" suffix indicates RoHS-compliant, AEC-Q101-qualified construction in 13" paper tape and reel (51 = 1400 pcs/reel). Lead finish is matte tin, compliant with J-STD-002.
Can 1.5KE12AHE3/51 replace a bi-directional TVS like 1.5KE12CA?
No - 1.5KE12AHE3/51 is strictly uni-directional and cannot substitute for bi-directional devices like 1.5KE12CA in AC-coupled or polarity-reversing applications (e.g., RS-485, CAN). Using 1.5KE12AHE3/51 in such roles would leave the circuit unprotected during negative transients. Always match polarity type to system signal architecture.
1.5KE12AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE12AHE3/51 FAQ
1.How can I place an order for 1.5KE12AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12AHE3/51 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 1.5KE12AHE3/51 reliable?
The price and inventory of 1.5KE12AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE12AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12AHE3/51?
1.5KE12AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12AHE3/51 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 1.5KE12AHE3/51?
For technical support, including 1.5KE12AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE12AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE12AHE3/51 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 1.5KE12AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE12AHE3/51?
All 1.5KE12AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12AHE3/51, 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 1.5KE12AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE12AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12AHE3/51 Tags
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