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Vishay General Semiconductor - Diodes Division 1.5KA39AHE3/51
- Part No.:
- 1.5KA39AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA39AHE3/51.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,417
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Product details
Overview
1.5KA39AHE3/51 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 surge current, and operates up to +185 °C junction temperature - ideal for protecting automotive sensor signal lines and power rails against load dump and inductive switching transients.
For engineers reviewing the 1.5KA39AHE3/51 datasheet, 1.5KA39AHE3/51 pinout, 1.5KA39AHE3/51 application, or 1.5KA39AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 33.3 V stand-off voltage, ±0.1 %/°C VBR temperature coefficient, and HE3 suffix compliance with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repeated surge stress and features a molded epoxy case rated UL 94 V-0. Its unidirectional polarity enables precise reverse-biased protection of DC power rails and low-voltage signal paths without forward conduction interference.
Designed for automotive reliability, it supports operation from −65 °C to +185 °C, withstands 200 A non-repetitive forward surge (8.3 ms half-sine), and maintains low incremental surge resistance to minimize voltage overshoot during fast transients such as ISO 7637-2 Pulse 1 and Pulse 2b.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy surges common in automotive load-dump events |
| Breakdown Voltage (VBR) | 37.1–41.0 V - ensures reliable triggering above normal operating voltage while avoiding false clamping |
| Stand-off Voltage (VWM) | 33.3 V - defines maximum continuous reverse working voltage before leakage exceeds 1 µA |
| Clamping Voltage (VC @ IPPM) | 53.9 V @ 27.8 A - limits protected circuit voltage during worst-case surge |
| Junction Temperature Range | −65 °C to +185 °C - meets under-hood thermal requirements per AEC-Q101 |
| Surge Current (IPPM) | 27.8 A - quantifies maximum single-pulse current handling capability |
| Temperature Coefficient of VBR | +0.100 %/°C - enables predictable voltage shift across wide ambient ranges |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body with matte tin-plated leads; RoHS-compliant HE3 suffix; UL 94 V-0 rated; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., 24 V rail or sensor output); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over lifetime and after multiple surge events |
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under high-temperature/humidity storage, ensuring long-term solder joint integrity |
| 1500 W peak pulse rating (10/1000 µs) | Meets ISO 16750-2 and SAE J1113-11 surge immunity requirements for 12 V/24 V systems |
| Low incremental surge resistance | Reduces dynamic voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from ESD and inductive switching noise in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp reverse transients while preserving signal integrity. Use Value: Prevents latch-up or damage to 3.3 V/5 V interface ICs during ISO 10605 ESD events and ISO 7637-2 Pulse 1 (inductive kickback). | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil back-EMF and motor drive noise. IC Role / Device Role / Timing Role: Mounted across 24 V DC input terminals to absorb repetitive 1500 W surges without degradation. Use Value: Extends system uptime by eliminating field failures caused by transient-induced microcontroller resets or optocoupler damage. |
| Automotive Power Rail Protection | Telecom Power Supply Input |
Use Scenario: Guarding 24 V battery-fed ECUs against load-dump transients (ISO 16750-2 Test 4a, up to 60 V/100 ms). IC Role / Device Role / Timing Role: Placed directly at power entry point to shunt surge energy before reaching downstream regulators and MCUs. Use Value: Clamps peak voltage to ≤53.9 V within nanoseconds, preventing overvoltage shutdown or permanent damage to 36 V-rated components. | Use Scenario: Protecting AC/DC front-end rectifiers and PFC controllers in telecom base station power supplies from lightning-induced surges on primary-side inputs. IC Role / Device Role / Timing Role: Used in parallel with MOVs to improve response speed and reduce let-through voltage during fast transients. Use Value: Complements slower-acting MOVs by clamping sub-microsecond spikes that would otherwise stress bridge diodes and bulk capacitors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3/52 | Lower peak power (600 W), smaller SMB package, 33 V VWM, same AEC-Q101/HE3 qualification | Better suited for space-constrained PCBs and lower-energy transients (e.g., ESD-only zones) | Select when board area is limited and surge energy does not exceed 600 W; verify thermal derating at 185 °C |
| 1.5KE39A | Same VWM/VBR range but non-automotive grade, no AEC-Q101, higher leakage at 150 °C, TO-204AA package | Acceptable for industrial/commercial use where automotive qualification is not required | Choose only for cost-sensitive non-automotive designs; avoid in safety-critical or high-reliability deployments |
Compared with SMBJ33AHE3/52 and 1.5KE39A, the 1.5KA39AHE3/51 provides superior surge energy handling (1500 W vs. 600 W or 1500 W with reduced reliability), guaranteed AEC-Q101 performance, and optimized thermal robustness for sustained high-temperature operation - making it the preferred choice for mission-critical automotive power and signal protection.
Availability
1.5KA39AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power supply hardening requiring stable component supply across extended temperature and long product lifecycles.
Supply support for 1.5KA39AHE3/51 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 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive power distribution and sensor networks - emphasizing thermal stability, surge endurance, and long-term parametric consistency under cyclic stress.
FAQ
What is the maximum clamping voltage of the 1.5KA39AHE3/51 under surge conditions?
The 1.5KA39AHE3/51 has a maximum clamping voltage (VC) of 53.9 V at its rated peak pulse current of 27.8 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience voltages exceeding this level during defined surge events, enabling robust design margin for downstream 36 V-rated components.
Is the 1.5KA39AHE3/51 qualified for automotive applications?
Yes, the 1.5KA39AHE3/51 is explicitly AEC-Q101 qualified and designated as high-reliability/automotive grade (Base P/NHE3). It undergoes rigorous testing for temperature cycling, humidity bias, mechanical shock, and surge endurance - meeting requirements for under-hood deployment in engine control units, body electronics, and ADAS sensor modules.
What does the HE3 suffix indicate on the 1.5KA39AHE3/51?
The HE3 suffix on the 1.5KA39AHE3/51 denotes RoHS compliance, high-reliability construction, and successful completion of JESD201 Class 2 whisker testing. This ensures long-term solder joint integrity in high-temperature/humidity environments and confirms suitability for automotive and industrial applications where tin whisker formation could cause latent field failures.
How does the 1.5KA39AHE3/51 differ from the standard 1.5KA39A?
The 1.5KA39AHE3/51 includes the HE3 suffix, which adds JESD201 Class 2 whisker resistance and full RoHS compliance beyond the base 1.5KA39A specification. Both share identical electrical parameters (VBR, VC, PPPM), but only the HE3 version is approved for automotive use per AEC-Q101 and certified for high-reliability soldering processes.
What is the standoff voltage and leakage current of the 1.5KA39AHE3/51 at elevated temperature?
The 1.5KA39AHE3/51 has a stand-off voltage (VWM) of 33.3 V and maximum reverse leakage current of 1.0 µA at VWM and TJ = 25 °C. At TJ = 150 °C, leakage increases to 10 µA - a controlled, specified increase that remains within safe operational limits for automotive power rail monitoring and sensor biasing circuits.
1.5KA39AHE3/51 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):
- 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
1.5KA39AHE3/51 FAQ
1.How can I place an order for 1.5KA39AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA39AHE3/51 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 1.5KA39AHE3/51 reliable?
The price and inventory of 1.5KA39AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA39AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA39AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA39AHE3/51 transactions.
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4.How is shipping managed for 1.5KA39AHE3/51?
1.5KA39AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA39AHE3/51 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 1.5KA39AHE3/51?
For technical support, including 1.5KA39AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA39AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA39AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA39AHE3/51 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 1.5KA39AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA39AHE3/51?
All 1.5KA39AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA39AHE3/51, 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 1.5KA39AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA39AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA39AHE3/51 Tags
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