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Vishay General Semiconductor - Diodes Division 1.5KA39AHE3/54
- Part No.:
- 1.5KA39AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA39AHE3/54.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:3,392
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Product details
Overview
1.5KA39AHE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 53.9 V under 27.8 A peak pulse current, and operates up to +185 °C junction temperature. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines in automotive powertrain control modules.
For engineers reviewing the 1.5KA39AHE3/54 datasheet, 1.5KA39AHE3/54 pinout, 1.5KA39AHE3/54 application, or 1.5KA39AHE3/54 equivalent, key selection criteria include its 39 V nominal breakdown voltage (37.1–41.0 V range), low 0.100 %/°C VBR temperature coefficient, RoHS-compliant HE3 packaging, and 1.5KA case style with axial leads.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repeated surge stress and features a passivated silicon junction encapsulated in UL 94 V-0 epoxy. Its unidirectional polarity enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device sustains 200 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits 3.5 V maximum forward voltage at 100 A, supporting robust overcurrent handling during fault events. Thermal derating follows a defined curve up to 185 °C junction temperature, enabling reliable operation in under-hood automotive locations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - withstands high-energy transients common in automotive load-dump and inductive switching events |
| Breakdown Voltage VBR | 37.1–41.0 V at 1 mA - defines precise clamping onset for 39 V nominal systems |
| Clamping Voltage VC | 53.9 V at 27.8 A - limits downstream voltage stress during surge, protecting 50 V-rated ICs |
| Operating Temperature Range | −65 °C to +185 °C - supports placement near engines or in battery management units |
| Surge Current IPPM | 27.8 A (10/1000 µs) - quantifies maximum transient current it can shunt without failure |
| AEC-Q101 Qualified | Yes - certified for automotive electronic systems per stress test requirements including HTOL and TCT |
| RoHS & WEEE Compliant | Yes - HE3 suffix denotes lead-free, whisker-resistant matte tin plating per JESD201 Class 2 |
Pinout & Package
Package: Axial-leaded Case Style 1.5KA, molded epoxy body with UL 94 V-0 rating; cathode indicated by color band; leads are matte tin plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / surge return path | Connected to system ground or low-side reference; carries full surge current during clamping |
| Cathode | Protected line connection / clamping node | Connected to protected signal or power rail; voltage referenced to anode during transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures consistent clamping performance across 1000+ surge cycles without parameter drift |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) and SAE J1113-11 surge immunity requirements |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response time) |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS, and body electronics |
| High-temperature stability | 0.100 %/°C VBR tempco ensures predictable clamping across −40 °C to +150 °C ambient |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate drivers from inductive kickback during solenoid and fuel injector switching. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 12 V supply rail and ground, triggered only on overvoltage events. Use Value: Limits rail voltage to ≤53.9 V during 1500 W surges, preventing latch-up or oxide breakdown in 3.3 V/5 V logic and 40 V MOSFETs. |
Use Scenario: Safeguarding PWM gate drive signals and feedback sensing lines in variable-frequency drives exposed to EMI and switching noise. IC Role / Device Role / Timing Role: Fast-response transient suppressor on isolated analog input paths and optocoupler supply rails. Use Value: Clamps transients within <1 ns while maintaining <1 µA leakage at 33.3 V stand-off, preserving signal integrity in precision current sensing. |
| Automotive Battery Management System (BMS) | Telecom DC Power Distribution Panel |
Use Scenario: Shielding cell monitor ICs and CAN transceivers from battery terminal transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Primary overvoltage protection on 48 V auxiliary bus inputs feeding analog front-end and communication interfaces. Use Value: Withstands 200 A surge (8.3 ms) and maintains 185 °C max junction temperature, enabling direct placement on high-current PCB traces. |
Use Scenario: Guarding PoE-powered Ethernet switches and remote radio units against lightning-induced surges on -48 V DC feeds. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input stage upstream of DC/DC converters and hot-swap controllers. Use Value: Delivers 1500 W pulse handling with 53.9 V clamping, reducing need for multi-stage protection and simplifying compliance with IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39AHE3/52 | Same VBR range (37.1–41.0 V) and VC (53.3 V), but lower PPPM (600 W) and smaller SMB package (surface-mount) | Designed for space-constrained PCB layouts; lacks axial mechanical robustness for high-vibration environments | Select when board area is limited and surge energy is ≤600 W; not suitable for under-hood automotive mounting |
| 1.5KE39A | Same electrical specs (VBR, VC, PPPM), but non-automotive grade, no AEC-Q101 qualification, and standard tin-lead plating | Approved for industrial/commercial use only; not validated for automotive thermal cycling or humidity testing | Acceptable for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ39AHE3/52 and 1.5KE39A, the 1.5KA39AHE3/54 uniquely combines 1500 W surge capability, AEC-Q101 qualification, and axial-leaded mechanical durability-making it the only choice for high-reliability automotive power rail protection where vibration resistance and extended temperature operation are mandatory.
Availability
1.5KA39AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, and telecom DC power distribution panels requiring stable component supply across long production lifecycles.
Supply support for 1.5KA39AHE3/54 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 applications.
The 1.5KA series was engineered specifically for automotive transient suppression, emphasizing AEC-Q101 compliance, high-temperature operation, and robust surge handling in under-hood and battery-connected systems.
FAQ
What is the clamping voltage of the 1.5KA39AHE3/54 under maximum rated surge current?
The 1.5KA39AHE3/54 has a maximum clamping voltage (VC) of 53.9 V at its rated peak pulse current (IPPM) of 27.8 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream 50 V-rated components. The 1.5KA39AHE3/54 achieves this clamping performance while maintaining low incremental surge resistance, critical for fast-rising transients.
Is the 1.5KA39AHE3/54 suitable for bidirectional transient protection?
No, the 1.5KA39AHE3/54 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. It conducts in reverse bias above VBR but blocks forward current beyond ~3.5 V. For bidirectional protection, a separate device such as the 1.5KE39CA or dual-diode configuration would be required. The 1.5KA39AHE3/54's unidirectional design optimizes clamping efficiency in DC-biased automotive power rails.
What does the HE3/54 suffix indicate in 1.5KA39AHE3/54?
The HE3 suffix denotes RoHS-compliant, high-reliability construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance, while the /54 indicates the preferred package code for 13-inch paper tape and reel delivery (1400 units per reel). This packaging format supports automated SMT placement despite the axial lead form factor, and the HE3 plating ensures compatibility with lead-free reflow profiles up to 260 °C for 40 seconds.
How does the 1.5KA39AHE3/54 perform at elevated temperatures?
The 1.5KA39AHE3/54 maintains full functionality up to +185 °C junction temperature, with VBR varying only +0.100 %/°C - meaning a 30 °C rise from 25 °C increases breakdown voltage by just ~300 mV. Its power derating curve (Fig. 5) shows linear reduction from 100 % at 75 °C lead temperature down to ~50 % at 150 °C, enabling reliable deployment in high-ambient zones like engine compartments without external heatsinking.
Can the 1.5KA39AHE3/54 replace the 1.5KE39A in existing designs?
The 1.5KA39AHE3/54 shares identical electrical specifications with the 1.5KE39A (VBR, VC, PPPM, IPPM) but adds AEC-Q101 qualification, RoHS-compliant HE3 plating, and higher temperature capability (185 °C vs. 175 °C). Mechanical dimensions differ slightly (1.5KA has longer leads), so PCB footprint verification is required. The 1.5KA39AHE3/54 is a drop-in functional upgrade for automotive applications but requires layout review for axial lead clearance and mounting.
1.5KA39AHE3/54 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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
1.5KA39AHE3/54 FAQ
1.How can I place an order for 1.5KA39AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA39AHE3/54 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 1.5KA39AHE3/54 reliable?
The price and inventory of 1.5KA39AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA39AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA39AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA39AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA39AHE3/54?
1.5KA39AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA39AHE3/54 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 1.5KA39AHE3/54?
For technical support, including 1.5KA39AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA39AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA39AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA39AHE3/54 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 1.5KA39AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA39AHE3/54?
All 1.5KA39AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA39AHE3/54, 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 1.5KA39AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA39AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA39AHE3/54 Tags
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