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Vishay General Semiconductor - Diodes Division 1.5KE22A-E3/51
- Part No.:
- 1.5KE22A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22A-E3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,060
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Product details
Overview
1.5KE22A-E3/51 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 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 30.6 V at 49 A, 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 1.5KE22A-E3/51 datasheet, 1.5KE22A-E3/51 pinout, 1.5KE22A-E3/51 application, or 1.5KE22A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC-standard 1.5KE package details, clamping performance under surge conditions, thermal derating guidance, and direct alternative options with documented functional trade-offs.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power rating is defined per 10/1000 µs waveform with 0.01% duty cycle, and it maintains stable clamping up to 175 °C junction temperature.
The device exhibits a typical thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), enabling effective heat dissipation in PCB-mounted applications without heatsinking for short-duration transients. Standoff voltage is 18.8 V, reverse leakage is ≤1.0 µA at VWM, and forward voltage is 3.5 V at 100 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise voltage threshold where clamping initiates |
| VWM | 18.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 30.6 V at 49 A - clamped voltage during full 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity for lightning or inductive switching events |
| TJ Range | –55 °C to +175 °C - supports under-hood automotive and industrial environments without derating loss |
| IFSM | 200 A (8.3 ms half-sine) - surge current capability for unidirectional forward conduction during fault |
| RθJL | 15.4 °C/W - enables reliable thermal transfer to PCB copper when leads are soldered per JESD 22-B102 |
Pinout & Package
1.5KE22A-E3/51 is housed in the industry-standard axial-leaded Case Style 1.5KE package (JEDEC DO-201AD), with cathode indicated by a color band on one end. The two-terminal construction supports through-hole mounting and high-current PCB trace routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side (e.g., GND) in unidirectional clamp configuration |
| Cathode (banded end) | Current exit point in forward bias; clamping node in reverse bias | Connected to protected line (e.g., 24 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Handles ISO 7637-2 Pulse 1/2a/5a surges and IEC 61000-4-5 Level 3/4 transients without degradation |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or gas discharge tubes, protecting sensitive CMOS inputs |
| AEC-Q101 qualified option available | HE3 suffix variants meet automotive qualification for engine control, body electronics, and ADAS power domains |
| RoHS-compliant matte tin plating | Meets J-STD-002 solderability and JESD 201 Class 1A whisker resistance requirements |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Protecting 24 V supply input of an automotive ECU against load dump (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, conducting only during overvoltage events. Use Value: Clamps to 30.6 V at 49 A, preventing MOSFET gate oxide rupture and LDO regulator failure while surviving repeated 1500 W pulses. | Use Scenario: Shielding analog output of a pressure sensor (4–20 mA loop) from ESD and cable-induced surges in factory automation. IC Role / Device Role / Timing Role: TVS connected across sensor output and return, absorbing fast transients before they reach ADC front-end. Use Value: Sub-ns response ensures clamping occurs before 100 ns ESD pulse (IEC 61000-4-2) damages precision op-amp input stage. |
| Telecom DC Power Feeding | Consumer Appliance Motor Driver Protection |
Use Scenario: Safeguarding PoE-powered network switch DC input against induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary TVS on 48 V input rail, upstream of DC/DC converter and hot-swap controller. Use Value: 175 °C max junction temperature allows operation in sealed enclosures; 18.8 V VWM avoids false triggering during normal 48 V ±10% regulation. | Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in smart home vacuum cleaners. IC Role / Device Role / Timing Role: TVS mounted across motor terminals, diverting flyback energy away from H-bridge MOSFETs. Use Value: 200 A IFSM rating handles repetitive 8.3 ms surges; glass passivation prevents parameter drift after 10,000+ switching cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 35.5 V at 17 A | Better suited for space-constrained PCBs with moderate surge exposure (IEC 61000-4-5 Level 2) | Select SMBJ22A when board area is limited and peak surge energy is ≤600 W; not drop-in for 1.5KE22A-E3/51's through-hole footprint or 1500 W requirement. |
| 1.5KE22CA | Bidirectional variant (symmetrical clamping), same VBR range and PPPM, but no polarity marking | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where voltage reversals occur | Choose 1.5KE22CA only when bidirectional protection is needed; unidirectional 1.5KE22A-E3/51 is optimal for DC rails with defined ground reference. |
Compared with SMBJ22A and 1.5KE22CA, the 1.5KE22A-E3/51 provides higher surge robustness in axial-leaded form factor and optimized unidirectional clamping for grounded DC systems - making it preferred for industrial power supplies and automotive battery interfaces where mechanical ruggedness and 1500 W handling are mandatory.
Availability
1.5KE22A-E3/51 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, telecom DC feeding, and consumer appliance motor drive applications requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE22A-E3/51 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, power efficiency, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated through proven 1500 W clamping performance and AEC-Q101-ready variants.
FAQ
What is the breakdown voltage tolerance of 1.5KE22A-E3/51?
The 1.5KE22A-E3/51 has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, corresponding to ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for coordinating with downstream overvoltage lockout thresholds in power management ICs.
Is 1.5KE22A-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE22A-E3/51 indicates full RoHS compliance per Directive 2011/65/EU, with matte tin-plated leads meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance requirements. The molding compound is UL 94 V-0 rated, and no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE substances exceed threshold limits.
How does the clamping voltage of 1.5KE22A-E3/51 compare to its breakdown voltage?
The 1.5KE22A-E3/51 clamps to 30.6 V at its peak pulse current of 49 A (10/1000 µs), which is approximately 33% above its minimum breakdown voltage of 20.9 V. This incremental clamping voltage (ΔVC = 9.7 V) reflects low dynamic impedance, enabling efficient energy diversion while limiting voltage overshoot seen by protected circuitry - a key advantage over higher-impedance protectors like MOVs.
Can 1.5KE22A-E3/51 be used in automotive applications?
While the standard 1.5KE22A-E3/51 is commercial-grade, Vishay offers the AEC-Q101-qualified 1.5KE22AHE3_B variant with identical electrical specs and enhanced process controls for automotive use. For non-automotive applications such as industrial controls or telecom, the 1.5KE22A-E3/51 meets all functional requirements and operates reliably from –55 °C to +175 °C junction temperature.
What is the thermal resistance of 1.5KE22A-E3/51 and how does it affect layout?
The 1.5KE22A-E3/51 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, meaning each watt of sustained power raises junction temperature 15.4 °C above lead temperature. To maintain safe operation under repetitive surges, PCB layout should use ≥10 mm² copper pour per lead and avoid narrow traces - especially critical when operating near the 6.5 W steady-state power limit at 75 °C lead temperature.
1.5KE22A-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE22A-E3/51 FAQ
1.How can I place an order for 1.5KE22A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22A-E3/51 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 1.5KE22A-E3/51 reliable?
The price and inventory of 1.5KE22A-E3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE22A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE22A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22A-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22A-E3/51?
1.5KE22A-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22A-E3/51 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 1.5KE22A-E3/51?
For technical support, including 1.5KE22A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE22A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22A-E3/51 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 1.5KE22A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE22A-E3/51?
All 1.5KE22A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22A-E3/51, 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 1.5KE22A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE22A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22A-E3/51 Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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