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Vishay General Semiconductor - Diodes Division 1.5KA27AHE3/54
- Part No.:
- 1.5KA27AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA27AHE3/54.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:4,251
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Product details
Overview
1.5KA27AHE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode in the 1.5KA case style, featuring a breakdown voltage range of 25.7 V to 28.4 V, 1500 W peak pulse power (10/1000 µs), clamping voltage of 37.5 V at 40 A, and AEC-Q101 qualification for under-hood automotive electronics protection.
For engineers reviewing the 1.5KA27AHE3/54 datasheet, 1.5KA27AHE3/54 pinout, 1.5KA27AHE3/54 application, or 1.5KA27AHE3/54 equivalent, key selection criteria include clamping performance at rated surge current, high-temperature junction stability up to +185 °C, RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance, and compatibility with inductive load switching transients in safety-critical vehicle subsystems.
Technical Context
This TVS diode uses patented PAR® construction for low incremental surge resistance and excellent clamping linearity under repetitive 10/1000 µs transients. Its unidirectional polarity enables precise reverse-biased overvoltage clamping on DC power rails and signal lines.
Designed for automotive environments, it operates across –65 °C to +185 °C junction temperature, with thermal derating per Figure 2 and peak forward surge capability of 200 A (8.3 ms half-sine). The 1.5KA27AHE3/54 maintains stable VBR temperature coefficient of 0.096 %/°C and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 25.7 V min / 28.4 V max at 1 mA - defines precise clamping onset threshold for 24 V system protection |
| Clamping Voltage (VC) | 37.5 V at 40 A IPPM - limits downstream IC/MOSFET stress during ISO 7637-2 pulse 1/2a/5a events |
| Peak Pulse Power (PPPM) | 1500 W (10/1000 µs) - sustains high-energy transients without failure in engine control units |
| Junction Temperature Range | –65 °C to +185 °C - supports placement near powertrain heat sources without derating loss |
| Surge Current (IPPM) | 40 A (10/1000 µs) - delivers robust immunity against load dump and inductive kickback |
| AEC-Q101 Qualified | Yes - certified for automotive electronic modules requiring zero-defect reliability and long-term field stability |
| RoHS & Whisker Compliance | HE3 suffix: RoHS-compliant, matte tin leads, JESD201 Class 2 whisker resistant - ensures solder joint integrity in reflow and thermal cycling |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 rating, 0.375" (9.5 mm) lead length, axial-leaded DO-201AD-compatible outline. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / ground reference | Connected to system ground or low-side return; enables unidirectional clamping from cathode to anode |
| Cathode | Protected line input / power rail connection | Connected to 24 V supply or signal line; absorbs positive transients by avalanche conduction to anode |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent low dynamic impedance and tight VC/VBR ratio across production lots and temperature |
| 1500 W peak pulse power | Withstands repeated ISO 16750-2 load dump surges without parametric shift or catastrophic failure |
| AEC-Q101 qualification | Validated for automotive use via HTOL, TC, UHAST, and ESD testing - no screening waivers required |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving system-level EMI margin |
| High-reliability HE3 termination | Matte tin plating passes JESD201 Class 2 whisker test - eliminates risk of conductive filament growth in humid, high-vibration environments |
Applications
| Engine Control Unit (ECU) Power Rail Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 24 V supply inputs in diesel/gasoline ECUs from alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS clamps transient spikes above 28.4 V while maintaining low leakage (<1 µA at 23.1 V). Use Value: Prevents latch-up or gate oxide damage in microcontrollers and power MOSFET drivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Shields LIN bus transceivers and window motor drivers from inductive switching noise in door modules. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping diverts energy before sensitive analog front-ends saturate. Use Value: Maintains signal integrity on 12 V/24 V auxiliary rails with <37.5 V clamping ceiling at full 40 A surge current. |
| Advanced Driver Assistance Systems (ADAS) Camera Power Input | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Safeguards image sensor power supplies in rear-view and surround-view cameras exposed to battery transients. IC Role / Device Role / Timing Role: Automotive-grade TVS placed upstream of LDO regulators to prevent dropout or reset during cold-crank conditions. Use Value: Operates reliably at +125 °C ambient with <0.096 %/°C VBR drift - avoids false triggering or insufficient clamping. | Use Scenario: Protects H-bridge gate drivers from back-EMF during rapid EPS motor deceleration. IC Role / Device Role / Timing Role: Absorbs 200 A non-repetitive forward surge (8.3 ms) without bond wire fusing or junction failure. Use Value: Enables compact PCB layout with axial 1.5KA package - no heatsink required for intermittent surge duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/57T | Lower PPPM (400 W), SMA package, 28 V nominal VBR, 45.4 V VC at 8.8 A | Not AEC-Q101 qualified; suited for consumer/industrial, not automotive safety-critical systems | Select only for cost-sensitive non-automotive designs where 1500 W surge headroom is unnecessary |
| 1.5KE27A | Same VBR range but TO-204AA (DO-41) package, no HE3 whisker compliance, lower TJmax (175 °C) | Lacks AEC-Q101 qualification and automotive-grade reliability testing; limited to commercial temperature range | Acceptable for legacy industrial equipment where automotive qualification and extended temperature operation are not required |
Compared with SMAJ28A-E3/57T and 1.5KE27A, the 1.5KA27AHE3/54 provides 3.75× higher surge power handling, AEC-Q101 validation, and guaranteed 185 °C junction operation - making it the only suitable choice for ASIL-B/C power rail protection in modern vehicles.
Availability
1.5KA27AHE3/54 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS camera modules, and electric power steering systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KA27AHE3/54 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 family was engineered specifically for AEC-Q101-compliant transient suppression in 12 V and 24 V vehicle electrical systems, emphasizing thermal robustness, surge consistency, and long-term parametric stability under vibration and thermal cycling.
FAQ
What is the clamping voltage of the 1.5KA27AHE3/54 at its rated peak pulse current?
The 1.5KA27AHE3/54 has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream 24 V-rated ICs and MOSFETs. The 1.5KA27AHE3/54 achieves this with low incremental surge resistance inherent to its PAR® construction.
Is the 1.5KA27AHE3/54 qualified for automotive applications?
Yes, the 1.5KA27AHE3/54 is explicitly AEC-Q101 qualified, as confirmed in the Vishay document 88300 revision 20-Oct-08. It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and ESD qualification. The 1.5KA27AHE3/54 is designated "automotive grade" and intended for safety-critical vehicle subsystems.
What does the HE3/54 suffix mean in 1.5KA27AHE3/54?
The HE3 suffix indicates RoHS-compliant, high-reliability construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance requirements. The /54 denotes the preferred package code: 13-inch paper tape and reel, 1400 units per reel. This packaging ensures automated placement compatibility and long-term solderability for automotive manufacturing. The 1.5KA27AHE3/54 is fully traceable to these specifications.
How does the 1.5KA27AHE3/54 differ from the standard 1.5KA27A?
The 1.5KA27AHE3/54 adds HE3 qualification (RoHS + JESD201 Class 2 whisker resistance) and 54-reel packaging to the base 1.5KA27A device. Electrically and thermally identical, the 1.5KA27AHE3/54 is optimized for automotive production with enhanced lead finish reliability and standardized reel logistics - critical for Tier 1 suppliers requiring zero-defect solder joint integrity.
What is the maximum operating junction temperature for the 1.5KA27AHE3/54?
The 1.5KA27AHE3/54 has a maximum operating junction temperature (TJ) of +185 °C, validated per Vishay document 88300. This allows direct mounting near high-heat sources such as power inverters or engine compartments without external heatsinking. Derating curves (Figure 2) confirm usable surge capability even at elevated ambient temperatures, a key requirement for the 1.5KA27AHE3/54 in modern automotive electronics.
1.5KA27AHE3/54 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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1.5KA27AHE3/54 FAQ
1.How can I place an order for 1.5KA27AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA27AHE3/54 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 1.5KA27AHE3/54 reliable?
The price and inventory of 1.5KA27AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA27AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA27AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA27AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA27AHE3/54?
1.5KA27AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA27AHE3/54 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 1.5KA27AHE3/54?
For technical support, including 1.5KA27AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA27AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA27AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA27AHE3/54 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 1.5KA27AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA27AHE3/54?
All 1.5KA27AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA27AHE3/54, 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 1.5KA27AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA27AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA27AHE3/54 Tags
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