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Vishay General Semiconductor - Diodes Division 1.5KE18AHE3_B/C
- Part No.:
- 1.5KE18AHE3_B/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE18AHE3_B/C.pdf
- Description:
- 1.5KW,18V 5%,UNIDIR,AXIAL TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,082
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Product details
Overview
1.5KE18AHE3_B/C from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 17.1 V minimum breakdown voltage (VBR), 15.3 V maximum standoff voltage (VWM), 25.2 V clamping voltage at 59.5 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE18AHE3_B/C datasheet, 1.5KE18AHE3_B/C pinout, 1.5KE18AHE3_B/C application, or 1.5KE18AHE3_B/C equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world use cases in ESD- and lightning-transient-prone systems.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs waveform with 0.01% duty cycle, and it complies with ANSI/IEEE C62.35 surge standards.
The device supports high-reliability operation via AEC-Q101 qualification (per note 2), RoHS-compliant matte tin-plated leads, JESD 201 Class 2 whisker resistance (HE3 suffix), and UL 94 V-0 molded epoxy encapsulation - enabling deployment in automotive ECUs and industrial control modules where long-term surge immunity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V - defines guaranteed conduction onset under transient stress; ensures reliable triggering before downstream IC damage |
| VWM | 15.3 V - maximum continuous reverse operating voltage; sets safe DC bias margin below breakdown threshold |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 1500 W surge; determines protected circuit's peak stress level |
| PPPM | 1500 W - peak pulse power handling (10/1000 µs); enables robust protection against IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine); supports inrush current tolerance in power rail applications |
| TJ range | –55 °C to +175 °C - extended junction temperature capability; allows under-hood automotive and high-temp industrial placement |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance; facilitates heat dissipation without heatsink in PCB-constrained layouts |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or low-potential node in unidirectional clamp configuration; enables cathode-to-rail protection topology |
| Cathode | Reverse-biased terminal / high-side connection | Connected to protected line (e.g., 12 V rail); color band identifies this terminal per polarity marking convention |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualified (HE3_B variant) | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM - suitable for ASIL-B supporting functions |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating in standard PCB layouts |
| Clamping time <1 ns | Responds faster than MOVs or polymer-based protectors; prevents latch-up or gate oxide rupture in MOSFETs and ICs |
| JESD 201 Class 2 whisker resistance | Eliminates tin whisker growth risk in high-reliability assemblies; certified for 10 s solder dip at 275 °C |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power input exposed to load dump (ISO 7637-2 Pulse 5a) and coupled transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and chassis ground; clamps transients within 1 ns to limit voltage seen by DC/DC converter input stage. Use Value: Withstands 1500 W surges while holding clamped voltage at 25.2 V - below absolute maximum rating of typical 36 V-input buck controllers. |
Use Scenario: 4–20 mA current loop interface in PLC analog input module subject to field wiring ESD and inductive switching noise. IC Role / Device Role / Timing Role: TVS mounted across signal and return lines at connector entry point; suppresses ±8 kV contact ESD (IEC 61000-4-2) and 1 kV ring wave surges. Use Value: Low VWM (15.3 V) avoids interfering with normal 24 V loop headroom; fast response preserves signal integrity during transient events. |
| Telecom Line Interface Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: RS-485 transceiver bus lines in outdoor security camera housing subjected to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (anode-to-ground, cathode-to-line) provide asymmetric clamping aligned with common-mode voltage swing limits. Use Value: 25.2 V clamping voltage stays within RS-485 receiver common-mode range (–7 V to +12 V) when referenced to local ground, preventing data corruption. |
Use Scenario: Brushed DC motor driver PCB in smart home vacuum cleaner, where back-EMF spikes threaten MCU GPIO and H-bridge FETs. IC Role / Device Role / Timing Role: TVS placed across motor terminals to absorb inductive kickback energy; operates in parallel with flyback diode for enhanced energy absorption. Use Value: 1500 W pulse rating handles repetitive 100–200 V spikes at 10–50 Hz; RθJL = 15.4 °C/W enables self-cooling without thermal vias in compact layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower PPPM (600 W), smaller SMB package (surface-mount), higher VC (29.2 V @ 20.9 A) | Not AEC-Q101 qualified; limited to consumer-grade board space-constrained designs | Select when footprint size is critical and surge threat level is ≤ IEC 61000-4-5 Level 3 (2 kV) |
| 1.5KE18CA | Bidirectional variant; same VBR, VWM, and PPPM; no polarity marking; symmetric clamping | Required for AC-coupled or floating signal lines (e.g., Ethernet PHY, audio differential pairs) | Choose only when bidirectional protection is mandated - not a drop-in replacement for unidirectional 1.5KE18AHE3_B/C |
Compared with SMBJ18A, 1.5KE18AHE3_B/C delivers 2.5× higher surge power handling and automotive qualification; compared with 1.5KE18CA, it provides lower leakage and tighter VWM margin for DC rail protection but requires correct anode/cathode orientation during assembly.
Availability
1.5KE18AHE3_B/C is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial sensor interfaces, telecom line protection, and consumer appliance motor drive circuits requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE18AHE3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes demand proven surge endurance and AEC-Q101 validation.
FAQ
What is the AEC-Q101 qualification status of 1.5KE18AHE3_B/C?
The 1.5KE18AHE3_B/C carries full AEC-Q101 qualification per Note (2) in Vishay document 88301, covering stress tests including high-temperature operating life, temperature cycling, and ESD. This makes 1.5KE18AHE3_B/C suitable for automotive powertrain and body electronics where component reliability is mission-critical.
How does the clamping voltage of 1.5KE18AHE3_B/C compare to its breakdown voltage?
The 1.5KE18AHE3_B/C has a minimum breakdown voltage (VBR) of 17.1 V and a maximum clamping voltage (VC) of 25.2 V at 59.5 A. This 8.1 V differential reflects the device's incremental surge resistance and ensures protected circuits experience controlled overvoltage - well below destructive thresholds of typical 36 V-rated power ICs.
Can 1.5KE18AHE3_B/C be used in bidirectional signal protection?
No - 1.5KE18AHE3_B/C is strictly unidirectional, with cathode marked by a color band. For bidirectional protection (e.g., RS-485, USB D+/D−), the 1.5KE18CA variant must be used. Using 1.5KE18AHE3_B/C on AC signals risks reverse conduction and failure due to lack of symmetrical breakdown characteristics.
What is the thermal performance of 1.5KE18AHE3_B/C under sustained surge conditions?
1.5KE18AHE3_B/C has a junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and a maximum junction temperature of +175 °C. Under single-pulse conditions, it safely dissipates 1500 W; for repetitive surges, derating per Figure 2 in document 88301 applies - e.g., at TJ = 125 °C, PPPM reduces to ~1000 W.
Is 1.5KE18AHE3_B/C compatible with lead-free reflow processes?
Yes - the HE3 suffix confirms matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, rated for solder dip at 275 °C for 10 seconds. It supports standard lead-free reflow profiles (peak 260 °C) and meets JESD 201 Class 2 whisker resistance, making 1.5KE18AHE3_B/C suitable for modern RoHS-compliant manufacturing.
1.5KE18AHE3_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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.5V
- Current - Peak Pulse (10/1000µs):
- 60A
- 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
1.5KE18AHE3_B/C FAQ
1.How can I place an order for 1.5KE18AHE3_B/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE18AHE3_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 1.5KE18AHE3_B/C reliable?
The price and inventory of 1.5KE18AHE3_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 1.5KE18AHE3_B/C is usually 5 days.
3.What payment methods are accepted for 1.5KE18AHE3_B/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE18AHE3_B/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE18AHE3_B/C?
1.5KE18AHE3_B/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE18AHE3_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 1.5KE18AHE3_B/C?
For technical support, including 1.5KE18AHE3_B/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE18AHE3_B/C requirements.
6.How does Aetrix verify that 1.5KE18AHE3_B/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE18AHE3_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 1.5KE18AHE3_B/C meets industry standards.
7.What is the process for return or replacement of 1.5KE18AHE3_B/C?
All 1.5KE18AHE3_B/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE18AHE3_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 1.5KE18AHE3_B/C part is unused and in its original packaging.
Return procedure for 1.5KE18AHE3_B/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE18AHE3_B/C Tags
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ESD9B5.0ST5G
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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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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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