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Vishay General Semiconductor - Diodes Division 1.5KE20AHE3_B/C
- Part No.:
- 1.5KE20AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20AHE3_B/C.pdf
- Description:
- 1.5KW,20V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,911
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Product details
Overview
1.5KE20AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V standoff voltage (VWM), 27.7 V clamping voltage (VC) at 54.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE20AHE3_B/C datasheet, 1.5KE20AHE3_B/C pinout, 1.5KE20AHE3_B/C application, or 1.5KE20AHE3_B/C equivalent, this part delivers verified AEC-Q101 qualification (per note 2), RoHS-compliant matte tin-plated leads, UL 94 V-0 molded epoxy package, and JESD 201 Class 2 whisker resistance - critical for automotive, industrial, and telecom surge protection design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction within <1 ns, diverting surge current away from downstream components. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device is rated for 200 A non-repetitive forward surge current (IFSM), supports continuous power dissipation of 6.5 W on infinite heatsink at TL = 75 °C, and exhibits a temperature coefficient of VBR of +0.090 %/°C - enabling predictable clamping behavior across -55 °C to +175 °C operating junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at IT = 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 27.7 V at 54.2 A (10/1000 µs) - clamping voltage limiting protected circuit stress during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability per single 1 ms pulse, enabling robust ESD/lightning protection |
| IFSM | 200 A - surge current withstand for 8.3 ms half-sine wave, supporting high-energy inductive load switching events |
| TJ max. | +175 °C - extended junction temperature rating allowing operation in under-hood automotive or high-ambient industrial environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant epoxy body |
Pinout & Package
1.5KE20AHE3_B/C uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. The cathode is marked by a color band on the body; polarity must be observed in series connection with protected circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lower-potential rail; completes shunt path during avalanche conduction |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V rail or signal trace); color-banded end accepts transient voltage above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable breakdown voltage and low leakage (<1.0 µA at VWM) over lifetime and temperature |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per note (2) in datasheet |
| 1500 W peak pulse power | Handles high-energy transients from ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 Level 4 without degradation |
| UL 94 V-0 molding compound | Self-extinguishing epoxy housing meets flammability safety requirements for enclosed industrial and automotive enclosures |
| JESD 201 Class 2 whisker resistance | Matte tin plating withstands >1000 hrs at 150 °C, eliminating tin whisker risk in high-reliability PCB assemblies |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V supply lines in engine control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed in parallel with power input, clamping spikes within nanoseconds. Use Value: Limits voltage to ≤27.7 V during 54.2 A surges, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional TVS on 4–20 mA loop or 0–10 V output line, referenced to system ground. Use Value: Clamps induced surges from nearby motor drives or relay switching, preserving ADC accuracy and isolation integrity. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Protection |
Use Scenario: Front-end protection of Ethernet PHY power pins and auxiliary bias rails in DSLAM line cards. IC Role / Device Role / Timing Role: Primary-level TVS on +3.3 V/+5 V rails feeding PHY ICs, placed upstream of ferrite beads. Use Value: Absorbs 1500 W surges from AC mains coupling or lightning-induced common-mode noise on backplane traces. |
Use Scenario: Secondary-side DC output protection in wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Unidirectional clamp on regulated 5 V/9 V output, guarding USB ports and charging circuits. Use Value: Prevents overvoltage propagation to connected devices during internal regulator failure or capacitor discharge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | DO-214AA (SMB) package, 200 W PPPM, lower IPPM (32.4 A), same VBR/VC tolerance | Surface-mount only; unsuitable for through-hole designs or high-power chassis-grounded layouts | Select SMBJ20A only when board space constraints require SMD footprint and surge energy is ≤200 W |
| 1.5KE20CA | Bidirectional variant (VBR = 19.0–21.0 V), identical PPPM/VC, no polarity marking | Required for AC-coupled lines or differential signals where polarity reversal occurs (e.g., RS-485, audio lines) | Choose 1.5KE20CA instead of 1.5KE20AHE3_B/C only when protecting bidirectional or floating signal paths |
Compared with SMBJ20A and 1.5KE20CA, the 1.5KE20AHE3_B/C provides higher surge robustness (1500 W vs. 200 W), through-hole mechanical stability, and AEC-Q101 qualification - making it optimal for high-reliability DC power rail protection where layout and thermal mass support axial-leaded mounting.
Availability
1.5KE20AHE3_B/C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line cards, and consumer power adapter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE20AHE3_B/C 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 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance, AEC-Q101 validation, and UL-certified packaging for mission-critical power and signal line protection.
FAQ
What is the breakdown voltage tolerance of the 1.5KE20AHE3_B/C?
The 1.5KE20AHE3_B/C has a guaranteed breakdown voltage range of 19.0 V to 21.0 V at test current IT = 1.0 mA, per the Vishay datasheet revision 09-Aug-2022. This ±5 % tolerance ensures predictable turn-on behavior across production lots and temperature extremes, critical for designing margin-aware protection circuits where over-clamping or premature conduction must be avoided.
Is the 1.5KE20AHE3_B/C qualified for automotive use?
Yes, the 1.5KE20AHE3_B/C carries AEC-Q101 qualification per note (2) in the Vishay datasheet, covering the 1.5KE6.8AHE3_B to 1.5KE220AHE3_B family. This certification validates its reliability under automotive temperature cycling, humidity, mechanical shock, and surge stress - making it suitable for engine control, body electronics, and ADAS power rail protection.
What is the clamping voltage of the 1.5KE20AHE3_B/C at its rated peak pulse current?
The 1.5KE20AHE3_B/C clamps to a maximum of 27.7 V at its rated peak pulse current of 54.2 A (10/1000 µs waveform). This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events - essential for verifying compatibility with downstream IC absolute maximum ratings.
Does the 1.5KE20AHE3_B/C have a defined thermal resistance specification?
Yes, the 1.5KE20AHE3_B/C has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and junction-to-ambient (RθJA) of 75 °C/W, per the Vishay thermal characteristics table. These values enable accurate junction temperature estimation during sustained surge duty cycles or elevated ambient conditions, supporting thermal design validation for high-reliability deployments.
How does the HE3_B/C suffix affect the 1.5KE20AHE3_B/C's compliance status?
HE3_B/C denotes RoHS-compliant matte tin plating and JESD 201 Class 2 whisker resistance qualification, with "B" indicating revision level and "C" specifying 13" paper tape and reel packaging (1400 pcs/reel). This suffix confirms full environmental compliance and enhanced reliability for automated assembly - distinct from base-E3 commercial-grade variants lacking AEC-Q101 validation.
1.5KE20AHE3_B/C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 56A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE20AHE3_B/C FAQ
1.How can I place an order for 1.5KE20AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20AHE3_B/C 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 1.5KE20AHE3_B/C reliable?
The price and inventory of 1.5KE20AHE3_B/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE20AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20AHE3_B/C?
1.5KE20AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20AHE3_B/C 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 1.5KE20AHE3_B/C?
For technical support, including 1.5KE20AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE20AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE20AHE3_B/C 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 1.5KE20AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE20AHE3_B/C?
All 1.5KE20AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20AHE3_B/C, 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 1.5KE20AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE20AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20AHE3_B/C Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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