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Vishay General Semiconductor - Diodes Division 1.5KA20AHE3/54
- Part No.:
- 1.5KA20AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA20AHE3/54.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:4,838
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Product details
Overview
1.5KA20AHE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 27.7 V under 54.2 A peak pulse current, and operates up to +185 °C junction temperature - enabling robust protection in engine control units, ABS modules, and body electronics.
For engineers reviewing the 1.5KA20AHE3/54 datasheet, 1.5KA20AHE3/54 pinout, 1.5KA20AHE3/54 application, or 1.5KA20AHE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, 19.0–21.0 V breakdown range, 17.1 V stand-off voltage, low 1.0 µA leakage at TJ = 150 °C, and PAR®-constructed epoxy package rated UL 94 V-0.
Technical Context
This TVS diode uses patented PAR® (Planar Avalanche Rectifier) construction to achieve stable avalanche breakdown with minimal parameter drift over temperature and lifetime. Its unidirectional polarity and fast response time (<1 ns) enable precise clamping of positive-going transients on DC power buses and sensor supply lines.
The device is characterized for 10/1000 µs waveform compliance per ANSI/IEEE C62.35, with derated peak pulse current above 25 °C and validated performance across -65 °C to +185 °C operating junction range - meeting stringent automotive reliability requirements including solder dip (260 °C, 40 s) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy load dump and ISO 7637-2 Pulse 5a/b surges without failure |
| Breakdown Voltage VBR | 19.0–21.0 V at 1.0 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| Stand-off Voltage VWM | 17.1 V - maximum continuous reverse voltage before leakage exceeds 1.0 µA at 25 °C |
| Clamping Voltage VC | 27.7 V at 54.2 A IPPM - limits downstream voltage during worst-case surge, protecting 24 V system ICs |
| Junction Temperature Range | -65 °C to +185 °C - supports under-hood placement in automotive ECUs and transmission control modules |
| AEC-Q101 Qualified | Yes - certified for automotive applications per stress test requirements including HTGB, HTRB, and TCT |
| RoHS & WEEE Compliant | Yes - HE3 suffix denotes lead-free, matte tin-plated leads compliant with J-STD-002 and JESD22-B102 |
Pinout & Package
Case Style 1.5KA: molded epoxy body with axial leads; cathode indicated by color band; UL 94 V-0 flammability rating; 0.375" (9.5 mm) lead length; 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path; enables unidirectional clamping to ground |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., 24 V rail); avalanche conduction shunts surge energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables tight VBR tolerance (±5 %), low tempco (0.090 %/°C), and stable clamping over 1000+ surge events |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 Level 4 surge immunity requirements |
| AEC-Q101 qualified (automotive grade) | Validated for automotive under-hood environments including thermal cycling, humidity, and mechanical shock |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off in solenoid drivers) |
| Matte tin-plated leads, JESD201 Class 2 | Prevents tin whisker growth in high-reliability 15+ year automotive deployments |
Applications
| Engine Control Unit (ECU) Power Protection | ABS Module Sensor Line Protection |
|---|---|
Use Scenario: Protects 24 V supply input of diesel ECU against alternator load dump surges up to 60 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive transients to ground, limiting rail voltage to ≤27.7 V during 1500 W pulses. Use Value: Prevents latch-up or permanent damage to MCU, CAN transceivers, and voltage regulators exposed to ISO 7637-2 Pulse 5a. |
Use Scenario: Shields wheel speed sensor signal lines from coupled transients induced by nearby solenoid actuation. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) unidirectional clamping protects analog front-end amplifiers without distorting 1–15 kHz sine wave signals. Use Value: Maintains signal integrity while suppressing >1 kV transients, ensuring accurate speed measurement during braking events. |
| Body Control Module (BCM) LIN Bus Protection | Transmission Control Unit (TCU) Solenoid Driver Protection |
Use Scenario: Installed on LIN bus VCC line (12 V) to suppress ESD and switching noise from door module actuators. IC Role / Device Role / Timing Role: Clamps fast ESD events (<1 ns rise) with 17.1 V stand-off to avoid false triggering of LIN transceivers. Use Value: Enables reliable communication at 19.2 kbps without signal distortion or bus lockup during repeated ESD contact discharge. |
Use Scenario: Placed across 24 V solenoid coil terminals to absorb inductive kickback when PWM-driven shift solenoids de-energize. IC Role / Device Role / Timing Role: Absorbs 200 A IFSM surge energy (8.3 ms half-sine) and clamps flyback voltage to safe levels for driver FETs. Use Value: Extends MOSFET lifetime by eliminating voltage spikes >60 V that cause avalanche overstress and gate oxide degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20AHE3/52 | Same VWM (17.1 V) and VC (27.7 V), but lower PPPM (600 W) and smaller SMB package (lower thermal mass) | Rated for lower-energy transients (e.g., IEC 61000-4-2 ESD only); not suitable for load dump | Select when space-constrained PCB layout prioritizes footprint over automotive load dump immunity |
| 1.5KE20A | Same electrical specs but TO-204AA (DO-4) metal-can package; no AEC-Q101 qualification; higher thermal resistance | Lacks automotive reliability validation; unsuitable for under-hood use per OEM requirements | Choose only for non-automotive industrial applications where cost outweighs qualification needs |
Compared with 1.5KA20AHE3/54, SMBJ20AHE3/52 offers reduced surge handling for compact designs, while 1.5KE20A provides identical clamping with legacy packaging but no automotive qualification - making 1.5KA20AHE3/54 the sole option meeting AEC-Q101, 1500 W, and high-temp operation in one device.
Availability
1.5KA20AHE3/54 is available at Aetrix Electronics and suitable for automotive engine control, brake system electronics, and body electronics requiring stable component supply across long production lifecycles and extreme temperature environments.
Supply support for 1.5KA20AHE3/54 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 automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC-Q101-compliant automotive transient suppression - emphasizing thermal stability, surge endurance, and process-controlled PAR® junctions for consistent clamping behavior in harsh environments.
FAQ
What is the exact breakdown voltage range for 1.5KA20AHE3/54?
The 1.5KA20AHE3/54 has a guaranteed breakdown voltage (VBR) range of 19.0 V to 21.0 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This tight ±5 % tolerance ensures predictable clamping onset in 24 V automotive systems and eliminates ambiguity during surge threshold design.
Is 1.5KA20AHE3/54 qualified for automotive under-hood applications?
Yes, 1.5KA20AHE3/54 is AEC-Q101 qualified and rated for operation from -65 °C to +185 °C junction temperature. Its PAR® construction, UL 94 V-0 molding compound, and JESD201 Class 2 whisker-resistant leads meet all critical requirements for under-hood deployment in ECUs, TCUs, and ABS modules.
How does the clamping voltage of 1.5KA20AHE3/54 compare to its stand-off voltage?
The 1.5KA20AHE3/54 has a stand-off voltage (VWM) of 17.1 V and clamps at 27.7 V under 54.2 A peak pulse current (IPPM). This 10.6 V differential ensures sufficient margin between normal operation and clamping activation, preventing false triggering while maintaining effective protection during ISO 7637-2 Pulse 5a events.
What packaging format is supplied for 1.5KA20AHE3/54?
1.5KA20AHE3/54 is supplied in 13" diameter paper tape and reel packaging (package code 54), with a base quantity of 1400 units per reel. The axial-leaded Case Style 1.5KA package features matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
Can 1.5KA20AHE3/54 be used in bidirectional configurations?
No, 1.5KA20AHE3/54 is unidirectional only, as explicitly stated in the Vishay datasheet. Its internal structure and polarity marking (cathode band) support clamping of positive transients to ground only. For bidirectional protection, two devices must be used in series opposition or a dedicated bidirectional TVS such as 1.5KAS20AHE3/54 must be selected.
1.5KA20AHE3/54 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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
1.5KA20AHE3/54 FAQ
1.How can I place an order for 1.5KA20AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA20AHE3/54 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 1.5KA20AHE3/54 reliable?
The price and inventory of 1.5KA20AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA20AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA20AHE3/54?
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4.How is shipping managed for 1.5KA20AHE3/54?
1.5KA20AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA20AHE3/54 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 1.5KA20AHE3/54?
For technical support, including 1.5KA20AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA20AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA20AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA20AHE3/54 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 1.5KA20AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA20AHE3/54?
All 1.5KA20AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA20AHE3/54, 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 1.5KA20AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA20AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA20AHE3/54 Tags
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