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Taiwan Semiconductor Corporation 1.5KE30CA
- Part No.:
- 1.5KE30CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE30CA.pdf
- Description:
- TVS 1500W 30V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:2,010
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Product details
Overview
1.5KE30CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in automotive and industrial power rails. It features a nominal breakdown voltage of 30V, clamping voltage of 41.4V at 38A peak impulse current, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity standards.
For engineers reviewing the 1.5KE30CA datasheet, 1.5KE30CA pinout, 1.5KE30CA application, or 1.5KE30CA equivalent, this device is selected for robust ESD and inductive switching transient suppression where fast response (<5.0ns), low dynamic impedance, and AEC-Q101 qualification are required.
Technical Context
The 1.5KE30CA operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or floating signal/power lines without polarity dependency. Its VBR min/max of 28.5V/31.5V at 1mA test current and VC of 41.4V at IPP = 38A define its precise overvoltage limiting window under 10/1000μs surge conditions.
Thermal performance is rated for TJ up to +175°C, with steady-state power dissipation of 5W at TL = 75°C on a 16mm × 16mm copper pad. The device exhibits <1μA blocking leakage above 25.6V VWM and a temperature coefficient of 0.097%/°C for VBR stability across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 28.5V min / 31.5V max - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 25.6V - maximum continuous reverse working voltage before leakage exceeds 1μA |
| VC @ IPP = 38A | 41.4V - clamped voltage during 10/1000μs surge, limiting downstream circuit stress |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard waveform |
| TJ max | +175°C - junction temperature limit enabling operation in under-hood automotive environments |
| Response time | <5.0ns - time from 0V to VBR under bidirectional surge, critical for ESD and fast transients |
| Package | DO-201 - industry-standard axial leaded package with UL 94V-0 molding compound and tin-plated leads |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional variants; 1.5KE30CA is bidirectional and marked with part-specific code (no polarity band). Weight: 0.090g. Lead finish: pure tin, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Lead 1 / Lead 2 | Current path terminals | Both leads conduct identically during surge events; no internal asymmetry or control logic |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per AEC specification |
| ISO 7637-2 compliance | Tested against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) waveforms |
| Low dynamic impedance | Enables tight clamping ratio (VC/VBR ≈ 1.34) and minimal voltage overshoot during fast surges |
| Halogen-free construction | Meets IEC 61249-2-21 requirements for environmentally compliant PCB assembly |
| UL 94V-0 flammability rating | Epoxy molding compound self-extinguishes within 10 seconds after flame removal, supporting safety-critical designs |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24V CAN bus power lines from load dump and alternator transients in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of DC-DC converter input to absorb 1500W ISO 7637-2 Pulse 5a energy. Use Value: Limits voltage to ≤41.4V during 38A surge, preventing damage to downstream PMICs and microcontrollers rated for 36V absolute max. |
Use Scenario: Safeguarding 24V digital input modules in factory automation controllers exposed to relay coil flyback. IC Role / Device Role / Timing Role: Fast-response (<5ns) transient suppressor across field-side inputs to absorb inductive kickback from solenoid drivers. Use Value: Clamps transients within 5ns to 41.4V, ensuring input logic remains within safe VIH/VIL thresholds and avoids false triggering. |
| LED Driver Overvoltage Suppression | AC-DC Adapter Surge Protection |
Use Scenario: Protecting constant-current LED driver ICs in outdoor lighting from lightning-induced surges on 24–48V DC distribution lines. IC Role / Device Role / Timing Role: Primary surge limiter on output rail, placed between driver output and LED string to prevent catastrophic failure during line transients. Use Value: Withstands 1500W 10/1000μs pulses while maintaining clamping below 42V, preserving LED forward voltage margin and driver FET SOA. |
Use Scenario: Secondary-side transient suppression in universal-input AC-DC adapters powering IoT gateways. IC Role / Device Role / Timing Role: Bidirectional clamp across 24V output rail to mitigate cross-coupled noise from primary-side MOSFET switching and external EFT events. Use Value: Delivers <1μA leakage at 25.6V VWM, minimizing standby power loss while providing 41.4V clamping for EN 61000-4-4 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30CA | Same DO-214AC (SMA) package; lower PPK (400W); VBR 28.5–31.5V; VC = 48.4V @ 8.3A | Lower surge rating suits consumer-grade 24V systems; not AEC-Q101 qualified | Select when space-constrained layouts require surface-mount and surge energy is ≤400W |
| ON Semiconductor 1.5SMC33CA | DO-214AB (SMC) package; PPK = 1500W; VBR 28.2–31.4V; VC = 45.7V @ 34A; AEC-Q101 option available | Higher VC increases downstream voltage stress; larger SMC footprint vs. DO-201 axial leads | Choose when board layout accommodates wider SMC body and higher clamping voltage is acceptable |
Compared with SMAJ30CA and 1.5SMC33CA, the 1.5KE30CA delivers identical VBR tolerance and AEC-Q101 qualification in a legacy axial DO-201 package optimized for through-hole reliability and thermal mass, making it preferred for high-surge industrial and automotive harness-mounted protection.
Availability
1.5KE30CA is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting systems, and power supply design requiring stable component supply with long lifecycle support.
Supply support for 1.5KE30CA 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The 1.5KE series was engineered specifically for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and transportation applications demanding AEC-Q101 validation and ISO 7637-2 compliance.
FAQ
What is the clamping voltage of the 1.5KE30CA under standard surge conditions?
The 1.5KE30CA has a maximum clamping voltage (VC) of 41.4V at a peak impulse current (IPP) of 38A, measured using the standardized 10/1000μs double-exponential surge waveform. This value ensures protected circuits remain below critical overvoltage thresholds during real-world transients such as load dump or inductive switching events. The 1.5KE30CA maintains this clamping performance across its full operating temperature range.
Is the 1.5KE30CA suitable for automotive applications?
Yes, the 1.5KE30CA is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b immunity standards - making it suitable for 12V and 24V automotive power networks. Its DO-201 package provides mechanical robustness for under-hood environments, and its +175°C maximum junction temperature supports operation near engines or power converters. The 1.5KE30CA is widely used in ECUs, body control modules, and infotainment power supplies.
How does the 1.5KE30CA differ from unidirectional variants like 1.5KE30C?
The 1.5KE30CA is bidirectional, meaning it clamps symmetrically for both positive and negative transients, while unidirectional versions (e.g., 1.5KE30C) only protect against one polarity and require correct orientation in-circuit. The 1.5KE30CA has no cathode band marking and functions identically regardless of lead placement. Its VBR and VC values apply in both directions, simplifying layout for AC-coupled or floating nodes where polarity is undefined.
What is the maximum steady-state power dissipation for the 1.5KE30CA?
The 1.5KE30CA has a steady-state power dissipation (PD) rating of 5W when mounted on a 16mm × 16mm copper pad at lead temperature (TL) of 75°C. This rating applies only to continuous DC or low-frequency conditions - not surge events. For transient suppression, the device relies on its 1500W peak pulse power (PPK) rating at TA = 25°C, derated linearly above that ambient temperature per Fig.2 in the datasheet. The 1.5KE30CA's thermal design supports sustained operation in high-temperature enclosures.
Does the 1.5KE30CA have halogen-free and RoHS-compliant construction?
Yes, the 1.5KE30CA uses halogen-free molding compound per IEC 61249-2-21 and is fully RoHS compliant. Its epoxy body meets UL 94V-0 flammability requirements, and its pure tin-plated leads comply with J-STD-002 for solderability. These material attributes make the 1.5KE30CA suitable for environmentally regulated markets including EU automotive and industrial equipment, and align with modern green manufacturing practices. The 1.5KE30CA documentation confirms compliance without exemptions.
1.5KE30CA 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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
1.5KE30CA FAQ
1.How can I place an order for 1.5KE30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE30CA 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 1.5KE30CA reliable?
The price and inventory of 1.5KE30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE30CA is usually 5 days.
3.What payment methods are accepted for 1.5KE30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE30CA?
1.5KE30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE30CA 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 1.5KE30CA?
For technical support, including 1.5KE30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE30CA requirements.
6.How does Aetrix verify that 1.5KE30CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE30CA 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 1.5KE30CA meets industry standards.
7.What is the process for return or replacement of 1.5KE30CA?
All 1.5KE30CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE30CA, 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 1.5KE30CA part is unused and in its original packaging.
Return procedure for 1.5KE30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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