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Vishay General Semiconductor - Diodes Division 1.5KA39HE3/54
- Part No.:
- 1.5KA39HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA39HE3/54.pdf
- Description:
- TVS DIODE 31.6VWM 56.4VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,475
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Product details
Overview
1.5KA39HE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 56.4 V under 26.6 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor interfaces in engine control units and ADAS modules.
For engineers reviewing the 1.5KA39HE3/54 datasheet, 1.5KA39HE3/54 pinout, 1.5KA39HE3/54 application, or 1.5KA39HE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 35.1–42.9 V breakdown range, low 0.100 %/°C VBR tempco, RoHS-compliant HE3 packaging, and 1.5KA case style mechanical compatibility with high-reliability automotive PCB layouts.
Technical Context
This TVS diode uses patented PAR® construction to achieve stable clamping under repetitive transients while maintaining low incremental surge resistance. Its unidirectional polarity and 1000 µA max reverse leakage at 31.6 V stand-off voltage support reliable DC-biased protection in 12 V and 24 V vehicle subsystems.
The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 3.5 V max forward voltage at 100 A, making it suitable for high-current load-dump suppression where fast response and minimal conduction loss are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains ISO 7637-2 Pulse 5a/b load-dump surges without failure |
| Breakdown Voltage VBR | 35.1–42.9 V @ 1 mA - ensures reliable triggering above nominal 24 V rail with margin |
| Clamping Voltage VC | 56.4 V @ 26.6 A - limits downstream voltage stress during worst-case transients |
| Junction Temperature Range | −65 °C to +185 °C - supports under-hood placement in automotive ECUs |
| AEC-Q101 Qualified | Yes - validated for automotive reliability per stress test requirements |
| RoHS & Whisker Tested | HE3 suffix meets JESD201 Class 2 and RoHS 2002/95/EC |
| Package Style | Case Style 1.5KA - axial-leaded, epoxy-molded, UL 94 V-0 rated body |
Pinout & Package
1.5KA39HE3/54 is an axial-leaded, two-terminal unidirectional TVS diode in Case Style 1.5KA. The cathode is marked by a color band on the body; leads are matte tin-plated and solderable per J-STD-002/JESD22-B102. Package dimensions: 1.0" (25.4 mm) min length, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) max body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Current exit point under forward bias; protected line connection | Connected to protected line (e.g., battery feed); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across temperature and lifetime without parameter drift |
| 1500 W peak pulse rating | Withstands automotive load-dump events per ISO 7637-2 without degradation |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off) |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and surge endurance |
| Solder dip tolerance | Rated for 260 °C / 40 s - compatible with standard lead-free reflow and wave processes |
Applications
| Engine Control Unit (ECU) Power Input | ADAS Camera Module Signal Lines |
|---|---|
Use Scenario: Protects 24 V supply input of diesel ECU against ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive spike). IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed upstream of DC/DC converter input. Use Value: Limits transient voltage to ≤56.4 V, preventing damage to 60 V-rated input capacitors and controller ICs. |
Use Scenario: Shields LVDS or FPD-Link III video signal pairs in surround-view camera modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at VWM) unidirectional clamp on differential data lines. Use Value: Maintains signal integrity with <3.5 V forward voltage at 100 A, avoiding DC bias shift in analog video paths. |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards LIN transceiver I/O pins against battery reversal and jump-start transients in door module applications. IC Role / Device Role / Timing Role: Standoff voltage (31.6 V) exceeds LIN bus operating range (12 V ±10 %), enabling fail-safe clamping only during faults. Use Value: 1000 µA leakage at VWM avoids loading LIN pull-up resistors and preserves bus timing margins. |
Use Scenario: Suppresses inductive kickback from 3-phase BLDC motor windings during PWM switching in EPS actuator drivers. IC Role / Device Role / Timing Role: High-surge-current (200 A IFSM) TVS placed across H-bridge high-side FET drains. Use Value: Fast response time and low VF (3.5 V @ 100 A) reduce energy dissipation and thermal stress during repeated motor commutation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36AHE3/52 | Lower PPPM (600 W), smaller SMB package, bidirectional option available | Better suited for space-constrained PCBs; lacks AEC-Q101 qualification for under-hood use | Select when board area is limited and automotive under-hood qualification is not required |
| 1.5KE39A | Same VBR range but non-automotive grade; no HE3 whisker testing or AEC-Q101 validation | Approved for industrial/commercial use only; not rated for automotive temperature or reliability stress tests | Choose only for cost-sensitive non-automotive designs where 185 °C operation is unnecessary |
Compared with 1.5KA39HE3/54, SMBJ36AHE3/52 offers compact size but sacrifices 60 % pulse power and automotive qualification, while 1.5KE39A matches electrical specs but omits AEC-Q101 validation and high-temp reliability - making 1.5KA39HE3/54 the sole choice for production automotive power rail protection.
Availability
1.5KA39HE3/54 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, body control modules, and electric power steering systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KA39HE3/54 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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive environments.
The 1.5KA series was engineered specifically for automotive transient suppression, combining AEC-Q101 qualification, high-temperature operation, and robust PAR® construction to meet ISO 7637-2 and ISO 16750-2 requirements.
FAQ
What is the clamping voltage of the 1.5KA39HE3/54 under peak pulse conditions?
The 1.5KA39HE3/54 has a maximum clamping voltage (VC) of 56.4 V at 26.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The 1.5KA39HE3/54 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA39HE3/54 qualified for automotive applications?
Yes, the 1.5KA39HE3/54 is AEC-Q101 qualified and designated as high-reliability/automotive grade (Base P/N HE3). It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and surge endurance - meeting requirements for under-hood and safety-critical vehicle systems. The 1.5KA39HE3/54 is explicitly listed in Vishay's automotive-grade product documentation.
What does the HE3 suffix mean on the 1.5KA39HE3/54?
The HE3 suffix on the 1.5KA39HE3/54 indicates RoHS compliance, high-reliability construction, and qualification to JESD201 Class 2 for tin whisker mitigation. It also confirms adherence to automotive-grade process controls and screening per AEC-Q101. The 1.5KA39HE3/54 is supplied in 13" paper tape and reel (package code 54, base quantity 1400 units).
Can the 1.5KA39HE3/54 be used in bidirectional configurations?
No, the 1.5KA39HE3/54 is available in uni-directional polarity only, as confirmed in the Vishay datasheet Document Number 88300. Its internal structure and marking (cathode band) support clamping only for positive transients relative to ground. For bidirectional protection, a separate device such as the 1.5KA39AHE3/54 would be required - the 1.5KA39HE3/54 itself is not symmetrical.
What is the maximum operating temperature for the 1.5KA39HE3/54?
The 1.5KA39HE3/54 has a maximum junction temperature (TJ) of +185 °C and an operating junction/storage temperature range of −65 °C to +185 °C. This rating enables direct placement near heat sources in automotive power electronics, and the 1.5KA39HE3/54 maintains specified electrical parameters across this full range per derating curves in Figure 2 of the datasheet.
1.5KA39HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 26.6A
- 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
1.5KA39HE3/54 FAQ
1.How can I place an order for 1.5KA39HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA39HE3/54 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 1.5KA39HE3/54 reliable?
The price and inventory of 1.5KA39HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA39HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA39HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA39HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA39HE3/54?
1.5KA39HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA39HE3/54 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 1.5KA39HE3/54?
For technical support, including 1.5KA39HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA39HE3/54 requirements.
6.How does Aetrix verify that 1.5KA39HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA39HE3/54 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 1.5KA39HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA39HE3/54?
All 1.5KA39HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA39HE3/54, 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 1.5KA39HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA39HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA39HE3/54 Tags
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