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Vishay General Semiconductor - Diodes Division 1.5KA27HE3/54
- Part No.:
- 1.5KA27HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA27HE3/54.pdf
- Description:
- TVS DIODE 21.8VWM 39.1VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,150
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Product details
Overview
1.5KA27HE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode with 24.3 V to 29.7 V breakdown voltage, 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for high-reliability protection in engine control units and powertrain electronics.
For engineers reviewing the 1.5KA27HE3/54 datasheet, 1.5KA27HE3/54 pinout, 1.5KA27HE3/54 application, or 1.5KA27HE3/54 equivalent, key selection criteria include clamping voltage (39.1 V at 38.4 A), operating junction temperature up to +185 °C, RoHS-compliant HE3 packaging, and JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity to protect against negative-going transients on DC power rails. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching spikes in automotive 12 V systems.
The device features a molded epoxy case rated UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and a color band indicating cathode polarity. It is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) and derates linearly above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 24.3 V min / 29.7 V max at 1 mA - defines minimum voltage at which clamping initiates under transient stress |
| Clamping Voltage (VC) | 39.1 V at 38.4 A IPPM - maximum voltage seen by protected circuit during 10/1000 µs surge |
| Peak Pulse Power (PPPM) | 1500 W (10/1000 µs) - energy-handling capability for automotive load-dump and ISO 7637-2 pulses |
| Stand-off Voltage (VWM) | 21.8 V - maximum continuous reverse voltage before leakage exceeds 1 µA |
| Junction Temperature Range | –65 °C to +185 °C - enables operation in under-hood environments without thermal derating loss |
| Surge Current (IFSM) | 200 A (8.3 ms half-sine) - withstands repeated motor-commutation surges in brushed DC applications |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded DO-201AD molded epoxy package with 0.375" (9.5 mm) lead length, UL 94 V-0 rating, and cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional conduction path | Connected to ground or low-side return in clamp-to-rail configurations |
| Cathode | Negative terminal; marked by color band | Connected to protected line (e.g., battery rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across temperature and lifetime without parameter drift |
| AEC-Q101 qualification | Validated for automotive powertrain and chassis applications requiring zero field failure risk |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems up to 35 V |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature under-hood environments |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil de-energization) |
Applications
| Engine Control Unit (ECU) Power Input Protection | Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: Protects ECU microcontroller power supply from alternator load dump and starter motor cranking transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive overvoltage spikes on 12 V main input rail before they reach LDOs and MCU VDD. Use Value: Limits transient voltage to ≤39.1 V, preventing latch-up or permanent damage to 40 V-rated input stages. | Use Scenario: Shields CAN transceiver I/O pins from ESD and coupled noise in vehicle door modules and lighting nodes. IC Role / Device Role / Timing Role: Placed between CAN_H/CAN_L and chassis ground to shunt common-mode surges while preserving signal integrity. Use Value: Clamps ±30 kV contact ESD (IEC 61000-4-2) within 1 ns, maintaining <100 ps jitter impact on 500 kbps CAN signals. |
| Electric Power Steering (EPS) Motor Driver Protection | Automotive HVAC Blower Motor Circuit Protection |
Use Scenario: Guards H-bridge gate drivers and current sense amplifiers from inductive kickback during EPS motor commutation. IC Role / Device Role / Timing Role: Mounted across motor phase outputs to clamp flyback voltage spikes during PWM switching transitions. Use Value: Withstands 200 A surge (8.3 ms) and limits clamped voltage to 39.1 V, ensuring MOSFET VDS margin remains >20 V. | Use Scenario: Suppresses voltage spikes generated by brushed blower motor brushes arcing during speed changes. IC Role / Device Role / Timing Role: Connected in parallel with motor terminals to absorb energy from inductive collapse when PWM duty cycle drops. Use Value: Absorbs 1500 W peak power without degradation, extending motor driver IC lifetime in stop-start cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/52 | Lower PPPM (600 W), smaller SMB package, bidirectional option available | Limited to non-automotive industrial use; not AEC-Q101 qualified | Select only for cost-sensitive consumer applications where 1500 W surge immunity is not required |
| 1.5KE27A | Same VBR range but TO-204AA (DO-41) package; no HE3 whisker rating or AEC-Q101 certification | Not suitable for under-hood deployment due to lower TJ max (175 °C) and no automotive qualification | Acceptable for board-level prototyping but requires requalification for production automotive designs |
Compared with 1.5KA27HE3/54, SMBJ28A-E3/52 offers space savings but sacrifices 60% surge energy handling and automotive reliability; 1.5KE27A matches electrical specs but lacks the high-temperature stability and whisker-resistant plating needed for long-life automotive deployment.
Availability
1.5KA27HE3/54 is available at Aetrix Electronics and suitable for engine control units, body control modules, electric power steering systems, and HVAC blower motor circuits requiring stable component supply across automotive production lifecycles.
Supply support for 1.5KA27HE3/54 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, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5KA series was designed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing thermal robustness, long-term parametric stability, and solder-joint reliability under thermal cycling.
FAQ
What is the clamping voltage of the 1.5KA27HE3/54 under a 10/1000 µs surge?
The 1.5KA27HE3/54 has a maximum clamping voltage (VC) of 39.1 V at 38.4 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 39.1 V during standardized surge events. The 1.5KA27HE3/54 maintains this clamping performance across its full operating temperature range from –65 °C to +185 °C.
Is the 1.5KA27HE3/54 suitable for automotive under-hood applications?
Yes, the 1.5KA27HE3/54 is AEC-Q101 qualified and rated for junction temperatures up to +185 °C, making it suitable for under-hood applications such as engine control units and transmission control modules. Its HE3 suffix confirms compliance with JESD201 Class 2 whisker testing and RoHS requirements. The 1.5KA27HE3/54 also features a UL 94 V-0 molded epoxy case and matte tin-plated leads qualified to J-STD-002.
Does the 1.5KA27HE3/54 have bidirectional polarity capability?
No, the 1.5KA27HE3/54 is available in uni-directional polarity only, as confirmed in the Vishay document 88300. It protects against positive transients on the cathode side relative to anode (ground). For bidirectional protection, engineers must select a different part number from the same family-such as the 1.5KA27A variant-or consider a separate bidirectional TVS like the SMAJ28A. The 1.5KA27HE3/54's unidirectional design optimizes clamping efficiency for DC power rail applications.
What is the stand-off voltage (VWM) specification for the 1.5KA27HE3/54?
The stand-off voltage (VWM) for the 1.5KA27HE3/54 is 21.8 V, meaning it remains non-conductive up to this reverse voltage at 25 °C with leakage current ≤1 µA. This allows safe integration into 12 V automotive systems where nominal battery voltage reaches 14.5 V and transient spikes remain below the clamping threshold. The 1.5KA27HE3/54 maintains VWM stability across temperature due to its low VBR temperature coefficient (0.096 %/°C).
How does the 1.5KA27HE3/54 differ from the standard 1.5KA27 part?
The 1.5KA27HE3/54 differs from the base 1.5KA27 by incorporating the HE3 suffix, which denotes RoHS compliance, high-reliability construction, automotive grade qualification (AEC-Q101), and JESD201 Class 2 whisker resistance. The "/54" indicates packaging in 13" paper tape and reel (1400 units per reel). The 1.5KA27HE3/54 also features enhanced thermal derating and tighter parameter tolerances versus non-HE3 variants, making it the preferred choice for production automotive designs.
1.5KA27HE3/54 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):
- 21.8V
- Voltage - Breakdown (Min):
- 24.3V
- Voltage - Clamping (Max) @ Ipp:
- 39.1V
- Current - Peak Pulse (10/1000µs):
- 38.4A
- 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
1.5KA27HE3/54 FAQ
1.How can I place an order for 1.5KA27HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA27HE3/54 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 1.5KA27HE3/54 reliable?
The price and inventory of 1.5KA27HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA27HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA27HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA27HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA27HE3/54?
1.5KA27HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA27HE3/54 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 1.5KA27HE3/54?
For technical support, including 1.5KA27HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA27HE3/54 requirements.
6.How does Aetrix verify that 1.5KA27HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA27HE3/54 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 1.5KA27HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA27HE3/54?
All 1.5KA27HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA27HE3/54, 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 1.5KA27HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA27HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA27HE3/54 Tags
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