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Vishay General Semiconductor - Diodes Division 1.5KA16HE3/51
- Part No.:
- 1.5KA16HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA16HE3/51.pdf
- Description:
- TVS DIODE 12.9VWM 23.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
1.5KA16HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for robust overvoltage protection in harsh environments. It features a 14.4 V to 17.6 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 23.5 V maximum clamping voltage at 63.8 A, and AEC-Q101 qualification for automotive reliability.
For engineers reviewing the 1.5KA16HE3/51 datasheet, 1.5KA16HE3/51 pinout, 1.5KA16HE3/51 application, or 1.5KA16HE3/51 equivalent, this device is selected for high-temperature stability (TJ up to +185 °C), low incremental surge resistance, and fast response in inductive load switching protection circuits.
Technical Context
The 1.5KA16HE3/51 employs Vishay's patented PAR® construction for stable avalanche performance under repetitive surge stress. Its unidirectional polarity and 1.0 mA test current ensure precise VBR definition per ANSI/IEEE C62.35, with clamping behavior validated across junction temperatures from –65 °C to +185 °C.
It delivers 63.8 A peak pulse current (IPPM) at 23.5 V clamping, with 0.086 %/°C temperature coefficient of VBR, enabling predictable voltage margining in automotive power rail and sensor line protection. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and operates at 6.5 W steady-state dissipation on infinite heatsink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 14.4 V min / 17.6 V max at 1.0 mA - defines minimum trigger threshold and design margin against false triggering |
| Peak Pulse Power PPPM | 1500 W (10/1000 µs) - supports high-energy transients from load dump or inductive kick in 12 V systems |
| Maximum Clamping Voltage VC | 23.5 V at 63.8 A - ensures protected ICs (e.g., CAN transceivers, microcontrollers) remain below absolute max ratings |
| Operating Junction Temp | –65 °C to +185 °C - enables under-hood deployment without derating in automotive engine control units |
| AEC-Q101 Qualified | Automotive grade, high-reliability HE3 suffix - meets stress testing requirements for production automotive electronics |
| Stand-off Voltage VWM | 12.9 V - allows safe operation at nominal 12 V supply with 7 % headroom before conduction begins |
| Leakage Current ID | 1.0 µA max at VWM - minimizes standby power loss in always-on vehicle modules |
Pinout & Package
Case Style 1.5KA: molded epoxy body with matte tin-plated leads; cathode denoted by color band; RoHS-compliant, UL 94 V-0 rated compound; lead length 0.375" (9.5 mm); package outline conforms to Document Number 91000.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., battery rail, signal input); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent avalanche characteristics and long-term stability under thermal cycling and surge stress |
| 1500 W peak pulse rating (10/1000 µs) | Handles ISO 7637-2 Pulse 1, 2a, 3a/b, and SAE J1113-11 transients without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving system-level ESD immunity |
| JEDEC JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature automotive environments over 15+ year life |
| Solder dip 260 °C / 40 s | Supports standard lead-free reflow and wave solder processes without delamination or parameter shift |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of 12 V power rail against load dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and LDO input. Use Value: Limits rail voltage to ≤23.5 V during 1500 W surges, preventing damage to downstream MCU and analog front-end. |
Use Scenario: Safeguarding 24 V DC digital inputs from field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on isolated input channel before optocoupler or Schmitt trigger. Use Value: Clamps transients within 1 ns, preserving signal integrity while maintaining <1 µA leakage at 24 V nominal. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Interface |
Use Scenario: Protecting LIN bus transceiver pins from ESD and inductive switching noise in door module wiring harnesses. IC Role / Device Role / Timing Role: Localized TVS on each LIN data line, placed adjacent to connector. Use Value: Achieves 23.5 V clamping at 63.8 A with 0.086 %/°C VBR drift, ensuring reliable operation across –40 °C to +125 °C ambient. |
Use Scenario: Secondary surge suppression on 48 V telecom power interface upstream of DC/DC converter. IC Role / Device Role / Timing Role: High-power TVS stage following primary MOV-based protection. Use Value: Absorbs residual 10/1000 µs energy not captured by upstream components, extending system MTBF in central office equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16AHE3/52 | Lower PPPM (600 W), smaller SMB package, bidirectional option available | Better suited for space-constrained PCBs with lower-energy transients (e.g., USB ports) | Select when board area is critical and peak surge energy does not exceed 600 W |
| 1.5KE16A-E3/54 | Same VBR range but TO-204AA (DO-204AL) package, no AEC-Q101 qualification, higher VC (24.4 V) | Targeted at industrial/commercial use where automotive qualification is not required | Select for cost-sensitive non-automotive designs with identical electrical specs but relaxed reliability requirements |
Compared with 1.5KA16HE3/51, the SMBJ16AHE3/52 offers reduced footprint at the expense of 60 % lower surge capacity, while the 1.5KE16A-E3/54 provides identical clamping performance in a legacy package without automotive qualification-making 1.5KA16HE3/51 the only choice for AEC-Q101-compliant 1500 W protection.
Availability
1.5KA16HE3/51 is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC input conditioning, and telecom power interface surge suppression requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 1.5KA16HE3/51 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 demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive power networks, emphasizing thermal robustness, surge consistency, and long-term parametric stability under vibration and thermal cycling.
FAQ
What is the exact breakdown voltage range for 1.5KA16HE3/51?
The 1.5KA16HE3/51 has a guaranteed breakdown voltage (VBR) range of 14.4 V minimum to 17.6 V maximum, measured at 1.0 mA test current and TA = 25 °C. This range ensures reliable triggering above nominal 12 V system voltage while maintaining sufficient margin against ripple-induced false conduction. The 1.5KA16HE3/51 achieves this specification using Vishay's PAR® construction for tight process control.
Is 1.5KA16HE3/51 suitable for bidirectional signal line protection?
No, the 1.5KA16HE3/51 is unidirectional only, as explicitly stated in its datasheet features. It conducts in reverse bias during overvoltage events but blocks forward current beyond ~3.5 V. For bidirectional protection (e.g., RS-485, USB), a symmetric device like SMBJ16CAHE3/52 must be used. The 1.5KA16HE3/51 is intended for DC power rail or single-polarity signal line clamping.
What is the maximum clamping voltage of 1.5KA16HE3/51 at rated surge current?
The 1.5KA16HE3/51 clamps to a maximum of 23.5 V when subjected to its rated peak pulse current of 63.8 A (10/1000 µs waveform). This value is measured per Fig. 1 and Table 1 in Vishay Document 88300 and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events. The 1.5KA16HE3/51 maintains this clamping performance across its full operating temperature range.
Does 1.5KA16HE3/51 meet automotive qualification standards?
Yes, the 1.5KA16HE3/51 carries the HE3 suffix, indicating it is AEC-Q101 qualified and designated as high-reliability/automotive grade. It undergoes stress testing including HTOL, temperature cycling, and surge endurance per AEC-Q101 Rev D. This qualification is confirmed in the Mechanical Data section of Document 88300 and applies specifically to the 1.5KA16HE3/51-not generic 1.5KA16 variants.
What is the thermal resistance and power derating behavior of 1.5KA16HE3/51?
The 1.5KA16HE3/51 has a steady-state power dissipation (PD) of 6.5 W on an infinite heatsink at TL = 75 °C. Its thermal derating follows Figure 5: power capability drops linearly to zero at TJ = 185 °C. At 125 °C junction temperature, usable PD is approximately 4.0 W. This behavior is intrinsic to the Case Style 1.5KA package and directly impacts layout decisions for high-ambient automotive applications using the 1.5KA16HE3/51.
1.5KA16HE3/51 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):
- 12.9V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 23.5V
- Current - Peak Pulse (10/1000µs):
- 63.8A
- 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
1.5KA16HE3/51 FAQ
1.How can I place an order for 1.5KA16HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA16HE3/51 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 1.5KA16HE3/51 reliable?
The price and inventory of 1.5KA16HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA16HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA16HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA16HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA16HE3/51?
1.5KA16HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA16HE3/51 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 1.5KA16HE3/51?
For technical support, including 1.5KA16HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA16HE3/51 requirements.
6.How does Aetrix verify that 1.5KA16HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA16HE3/51 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 1.5KA16HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA16HE3/51?
All 1.5KA16HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA16HE3/51, 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 1.5KA16HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA16HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA16HE3/51 Tags
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