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Taiwan Semiconductor Corporation 1.5KE22A
- Part No.:
- 1.5KE22A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22A.pdf
- Description:
- TVS 1500W 22V 5% UNIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:7,582
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Product details
Overview
1.5KE22A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 22V, VBR = 20.9–23.1V at IT = 1.0mA, VWM = 18.8V, and clamping voltage VC = 30.6V at IPP = 51A under 10/1000μs surge. It is housed in a DO-201 axial package and used for automotive-level ESD and load-dump protection in power supply rails and interface lines.
For engineers reviewing the 1.5KE22A datasheet, 1.5KE22A pinout, 1.5KE22A application, or 1.5KE22A equivalent, key selection criteria include its 1500W peak pulse power rating, sub-1ps response time, AEC-Q101 qualification option, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional polarity marking on DO-201 leads.
Technical Context
The 1.5KE22A operates as a silicon avalanche diode optimized for fast clamping of high-energy transients. Its unidirectional configuration enables use in DC power line protection where reverse blocking is required, with VF = 3.5V at IF = 50A and IFSM = 200A (8.3ms half-sine).
It features low dynamic impedance and <1μA leakage above 10V, enabling minimal standby power loss. Thermal derating follows JEDEC standards, with TJMAX = 175°C and steady-state PD = 5W at TL = 75°C on 16mm × 16mm copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 20.9–23.1V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 18.8V - maximum continuous DC or RMS operating voltage before leakage exceeds 1μA |
| VC @ IPP = 51A | 30.6V - clamped voltage during 10/1000μs surge, limiting downstream IC stress |
| PPK | 1500W - peak pulse power handling per single non-repetitive event |
| IPP | 51A - maximum peak impulse current survivable at rated VC |
| TJMAX | 175°C - junction temperature limit supporting under-hood automotive deployment |
| Package | DO-201 - industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / Surge return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche conduction terminal / High-side connection | Connected to protected line (e.g., +12V rail); conducts when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating (10/1000μs) | Enables robust protection against ISO 7637-2 load dump and inductive switching events |
| Response time <1.0ps (0→VBR) | Clamps transients before sensitive logic or analog circuitry responds |
| VBR tempco = 0.092%/°C | Ensures stable clamping threshold across automotive temperature range (−40°C to +125°C ambient) |
| AEC-Q101 qualified version available | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with global environmental directives without compromising thermal or electrical performance |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load dump pulses up to 120V/400ms per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits clamped voltage to ≤30.6V, preventing damage to 3.3V/5V logic supplies downstream while surviving 1500W peak energy. |
Use Scenario: Safeguarding 24V digital input modules in factory automation against field-wiring ESD and relay coil flyback. IC Role / Device Role / Timing Role: Mounted at connector entry point to shunt fast transients (<5ns rise) before signal conditioning circuitry. Use Value: Sub-1ps response ensures clamping initiates before 24V comparator inputs exceed absolute max ratings, preserving system uptime. |
| LED Driver Overvoltage Clamp | DC-DC Converter Input Stage |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers subjected to accidental 48V supply misconnection. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-input rail to absorb overvoltage before buck controller IC. Use Value: Withstands 51A peak current at 30.6V clamp, allowing driver IC to remain within safe SOA during fault condition. |
Use Scenario: Shielding synchronous buck converter front-end from voltage spikes induced by long PCB traces or shared ground bounce. IC Role / Device Role / Timing Role: Placed directly at VIN pin of controller IC to minimize loop inductance and maximize clamping efficacy. Use Value: Low dynamic impedance ensures rapid energy diversion, reducing voltage overshoot to <31V and avoiding controller UVLO or latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A (Bourns) | 600W rating, SMC package, VC = 35.5V @ 17.1A, lower IPP | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy ESD and EFT | Select when board space is constrained and surge energy ≤600W suffices |
| 1N6279A (ON Semiconductor) | Identical electrical specs (VBR, VC, PPK), same DO-201 package, but no AEC-Q101 option | Acceptable for industrial/commercial use; lacks automotive qualification documentation | Choose when AEC-Q101 is not required and second-source availability is prioritized |
Compared with SMBJ22A, the 1.5KE22A delivers 2.5× higher surge power handling and tighter clamping for demanding automotive environments; compared with 1N6279A, it offers identical protection performance with optional AEC-Q101 validation for safety-critical systems.
Availability
1.5KE22A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC input hardening, LED driver overvoltage clamp, and DC-DC converter input stage applications requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE22A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing ruggedness, repeatable clamping, and compliance with ISO 7637-2 and IEC 61000-4-5 standards.
FAQ
What is the clamping voltage of the 1.5KE22A under maximum surge conditions?
The 1.5KE22A has a maximum clamping voltage VC of 30.6V at IPP = 51A using the standard 10/1000μs double-exponential waveform. This value is measured per JEDEC test conditions and ensures downstream components see no more than 30.6V during a full-rated 1500W transient event. The 1.5KE22A maintains this clamping performance across its specified operating temperature range.
Is the 1.5KE22A unidirectional or bidirectional?
The 1.5KE22A is a unidirectional TVS diode, indicated by its part number suffix "A" and cathode band marking on the DO-201 package. It blocks voltage up to 18.8V in reverse bias and avalanches only when anode-to-cathode voltage exceeds 20.9–23.1V. Bidirectional variants (e.g., 1.5KE22CA) exist but are distinct part numbers with different marking and testing.
Does the 1.5KE22A meet automotive qualification standards?
The base 1.5KE22A is not inherently AEC-Q101 qualified; however, the AEC-Q101 variant is designated as 1.5KE22AH (per ordering code table). This qualified version undergoes accelerated stress testing including HTGB, HTRB, and temperature cycling, and is documented in TSC's O2104 revision. Always verify the "H" suffix and associated qualification report when specifying for automotive use.
What is the maximum steady-state power dissipation for the 1.5KE22A?
The 1.5KE22A has a steady-state power dissipation (PD) of 5W when mounted on a 16mm × 16mm copper pad at lead temperature TL = 75°C. This rating applies only to continuous DC or low-frequency operation-not surge events-and assumes proper PCB thermal design. Derating is required above 25°C ambient per Figure 2 in the TSC datasheet.
How does the 1.5KE22A compare to the 1.5KE22 in terms of electrical performance?
The 1.5KE22A offers tighter VBR tolerance (20.9–23.1V) versus the standard 1.5KE22 (19.8–24.2V), resulting in more consistent clamping behavior and reduced risk of premature conduction. Both share identical package, PPK, VC, and thermal ratings. The "A" suffix denotes the tighter breakdown voltage bin, making the 1.5KE22A preferable for designs requiring precise overvoltage thresholds.
1.5KE22A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 51A
- 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:
- DO-201
1.5KE22A FAQ
1.How can I place an order for 1.5KE22A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22A 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 reliable?
The price and inventory of 1.5KE22A 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 is usually 5 days.
3.What payment methods are accepted for 1.5KE22A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22A?
1.5KE22A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22A 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?
For technical support, including 1.5KE22A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22A requirements.
6.How does Aetrix verify that 1.5KE22A is sourced from the original manufacturer or authorized distributors?
All 1.5KE22A 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 meets industry standards.
7.What is the process for return or replacement of 1.5KE22A?
All 1.5KE22A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22A, 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 part is unused and in its original packaging.
Return procedure for 1.5KE22A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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