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Vishay General Semiconductor - Diodes Division 1.5KA36HE3/73
- Part No.:
- 1.5KA36HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA36HE3/73.pdf
- Description:
- TVS DIODE 29.1VWM 52VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:4,711
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Product details
Overview
1.5KA36HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade 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 52.0 V under 28.8 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 units.
For engineers reviewing the 1.5KA36HE3/73 datasheet, 1.5KA36HE3/73 pinout, 1.5KA36HE3/73 application, or 1.5KA36HE3/73 equivalent, key selection criteria include breakdown voltage tolerance (32.4–39.6 V), clamping performance at rated IPPM, RoHS-compliant HE3 packaging, and high-temperature reliability under transient load switching conditions.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and exhibits low incremental surge resistance to minimize voltage overshoot during fast transients. Its unidirectional polarity and 1.0 µA max reverse leakage at 29.1 V stand-off voltage ensure minimal standby power loss in always-on automotive modules.
The device is characterized with a 10/1000 µs waveform per ANSI/IEEE C62.35 and derates linearly above 25 °C ambient - maintaining 100% peak pulse power capability only up to TJ = 25 °C, dropping to ~60% at TJ = 125 °C per Fig. 2. It supports 8.3 ms half-sine surge events up to 200 A IFSM without failure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in automotive load-dump and inductive switching events |
| Breakdown Voltage (VBR) | 32.4 V min / 39.6 V max at 1.0 mA - defines reliable turn-on threshold across temperature and unit variation |
| Clamping Voltage (VC) | 52.0 V at 28.8 A IPPM - maximum voltage seen by protected circuit during worst-case surge |
| Stand-off Voltage (VWM) | 29.1 V - maximum continuous reverse voltage before significant leakage; sets system operating margin |
| Junction Temperature Range | −65 °C to +185 °C - enables deployment in engine bay, transmission control, and under-hood ECUs |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and surge endurance per stress test plan |
| RoHS & Whisker Tested | HE3 suffix: compliant with RoHS 2002/95/EC and JESD201 Class 2 tin whisker mitigation |
Pinout & Package
Case Style 1.5KA: axial-leaded, molded epoxy package (UL 94 V-0), 0.375" (9.5 mm) lead length minimum, 0.210" (5.3 mm) body diameter. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference | Provides low-impedance path to shunt surge energy when reverse-biased beyond VBR |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., CAN_H, sensor supply) | Reverse-biased terminal where transient clamping occurs; marked by color band for orientation |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance over 1000+ surge cycles without parameter drift or thermal runaway |
| 1500 W peak pulse rating (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V automotive systems |
| Low incremental surge resistance | Minimizes VC – VBR differential, reducing stress on downstream ICs during fast-rising transients |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and eliminates tin whisker risk per JESD201 Class 2 |
| High-temperature operation (TJ max = 185 °C) | Supports placement near heat sources (e.g., power MOSFETs, DC-DC converters) without derating penalties |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protects microcontroller I/O and LIN bus transceivers from load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between protected signal line and chassis ground. Use Value: Limits voltage excursion to ≤52.0 V during 1500 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Shields encoder feedback lines and gate driver inputs from inductive kickback generated by BLDC motor commutation. IC Role / Device Role / Timing Role: Standoff protector on differential analog inputs (e.g., resolver sine/cosine) referenced to isolated ground. Use Value: Maintains signal integrity with <1.0 µA leakage at 29.1 V, avoiding DC offset errors in precision position sensing circuits. |
| Telecom Power Supply Input | Automotive ADAS Camera Module |
Use Scenario: Guards primary-side controller ICs against lightning-induced surges on AC/DC adapter input lines. IC Role / Device Role / Timing Role: First-stage clamping device upstream of bridge rectifier and bulk capacitor. Use Value: Absorbs 10/1000 µs surges up to 1500 W without degradation, enabling compliance with IEC 61000-4-5 Level 3. |
Use Scenario: Safeguards MIPI CSI-2 data lanes and power rails in front-facing camera ECU exposed to ignition noise and battery transients. IC Role / Device Role / Timing Role: Localized TVS on each 1.8 V/2.8 V rail and high-speed differential pair near connector. Use Value: Clamps sub-100 ns transients within 1.5 ns response time while adding <100 pF capacitance - no signal integrity impact on 1.5 Gbps video streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36AHE3/52 | Lower peak pulse power (600 W), smaller SMB package (vs. axial 1.5KA), bidirectional option available | Better suited for space-constrained PCBs; not rated for 185 °C operation or AEC-Q101 | Select when board area is critical and surge energy remains ≤600 W; verify thermal derating for under-hood use |
| 1.5KE36A | Same 1500 W rating but non-automotive grade; lacks AEC-Q101 qualification and HE3 whisker mitigation | Acceptable for industrial/commercial designs with lower reliability requirements and <150 °C ambient | Choose for cost-sensitive non-automotive applications where full automotive qualification is unnecessary |
Compared with 1.5KA36HE3/73, SMBJ36AHE3/52 trades surge robustness and high-temperature capability for compactness, while 1.5KE36A retains power handling but omits automotive qualification and long-term whisker resistance - making 1.5KA36HE3/73 the sole choice for AEC-Q101–mandated under-hood deployments.
Availability
1.5KA36HE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive protection, and telecom power input hardening requiring stable component supply across extended temperature and surge stress conditions.
Supply support for 1.5KA36HE3/73 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 optoelectronics for demanding industrial and automotive applications.
The 1.5KA family was engineered specifically for AEC-Q101–compliant transient suppression in engine control, transmission, and ADAS systems - emphasizing thermal stability, surge endurance, and process-controlled whisker mitigation.
FAQ
What is the clamping voltage of the 1.5KA36HE3/73 at its rated peak pulse current?
The 1.5KA36HE3/73 has a maximum clamping voltage (VC) of 52.0 V at 28.8 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on the protected circuit during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5KA36HE3/73 suitable for bidirectional signal line protection?
No, the 1.5KA36HE3/73 is unidirectional only, as confirmed in the "FEATURES" section of Vishay document 88300. It must be installed with cathode toward the protected line and anode to ground. For bidirectional protection (e.g., USB, RS-485), a different part such as the SMBJ36CAHE3/52 would be required - the 1.5KA36HE3/73 cannot be used in reverse-biased configurations.
Does the 1.5KA36HE3/73 meet AEC-Q101 stress test requirements?
Yes, the 1.5KA36HE3/73 is explicitly AEC-Q101 qualified per the "MECHANICAL DATA" section, where the HE3 suffix denotes high-reliability/automotive grade compliance. This includes validation for temperature cycling, high-temperature reverse bias (HTRB), and surge endurance - confirming suitability for automotive powertrain and chassis applications.
What is the maximum reverse leakage current of the 1.5KA36HE3/73 at its stand-off voltage?
At the stand-off voltage (VWM) of 29.1 V and ambient temperature of 25 °C, the 1.5KA36HE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 µA. At elevated junction temperature (TJ = 150 °C), leakage increases to 10 µA - a design-critical value for low-power always-on circuits where cumulative leakage could affect sleep-mode current budgets.
How does the HE3 suffix differentiate the 1.5KA36HE3/73 from standard 1.5KA36 parts?
The HE3 suffix on the 1.5KA36HE3/73 indicates RoHS compliance, AEC-Q101 qualification, and JESD201 Class 2 tin whisker mitigation - distinguishing it from non-HE3 variants like 1.5KA36A or 1.5KA36. These enhancements ensure long-term reliability in automotive under-hood environments where thermal cycling and mechanical vibration could otherwise accelerate whisker growth or parametric shift.
1.5KA36HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 29.1V
- Voltage - Breakdown (Min):
- 32.4V
- Voltage - Clamping (Max) @ Ipp:
- 52V
- Current - Peak Pulse (10/1000µs):
- 28.8A
- 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
1.5KA36HE3/73 FAQ
1.How can I place an order for 1.5KA36HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA36HE3/73 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 1.5KA36HE3/73 reliable?
The price and inventory of 1.5KA36HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA36HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA36HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA36HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA36HE3/73?
1.5KA36HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA36HE3/73 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 1.5KA36HE3/73?
For technical support, including 1.5KA36HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA36HE3/73 requirements.
6.How does Aetrix verify that 1.5KA36HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA36HE3/73 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 1.5KA36HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA36HE3/73?
All 1.5KA36HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA36HE3/73, 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 1.5KA36HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA36HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA36HE3/73 Tags
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