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Taiwan Semiconductor Corporation 1.5KE43CA R0G
- Part No.:
- 1.5KE43CA R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CA R0G.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,573
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Product details
Overview
1.5KE43CA R0G from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 43 V, working stand-off voltage 34.8 V, clamping voltage 61.9 V at 25 A peak pulse current, and junction temperature range −55 °C to +175 °C - used for ESD and surge protection in automotive power electronics and industrial control interfaces.
For engineers reviewing the 1.5KE43CA R0G datasheet, 1.5KE43CA R0G pinout, 1.5KE43CA R0G application, or 1.5KE43CA R0G equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, AEC-Q101 qualification status, and real-world clamping performance data for high-reliability transient suppression design.
Technical Context
The 1.5KE43CA R0G is a bidirectional avalanche diode designed to clamp transient overvoltages in both polarities without requiring external polarity management. Its low dynamic impedance and sub-nanosecond response time (<1 ps for unidirectional, 5 ns for bidirectional) enable fast suppression of EFT and lightning-induced surges.
It operates within a −55 °C to +175 °C junction temperature range and meets ISO 7637-2 immunity requirements for automotive applications. The device uses silicon planar construction with pure tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 38.7 V / 47.3 V at 1 mA test current - defines reliable avalanche initiation window under transient stress |
| VWM | 34.8 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPP | 61.9 V at 25 A peak pulse current - clamped voltage seen by protected circuit during 10/1000 μs surge |
| PPK | 1500 W - peak surge power handling capability per single 10/1000 μs waveform |
| IPP | 25 A - maximum non-repetitive peak impulse current the device safely clamps |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Leakage @ VWM | <1 μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking for polarity identification; body length 7.2 mm, diameter 4.2 mm, lead spacing 5.0 mm, weight ≈ 0.090 g; molded compound rated UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in reverse bias (bidirectional conduction) | Terminal conducts during positive transients relative to cathode; symmetric behavior enables bipolar clamping |
| Cathode (banded end) | Current exit point in reverse bias (bidirectional conduction) | Marked end identifies polarity; same terminal functions as anode during negative transients due to bidirectional structure |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per AEC standard |
| ISO 7637-2 compliance | Tested and rated for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (EFT) waveforms |
| Low dynamic impedance | Enables tighter clamping voltage margin and reduced let-through energy during fast transients |
| Fast response time | 5 ns response for bidirectional operation ensures suppression before downstream IC damage thresholds are exceeded |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained designs |
Applications
| Automotive Power Line Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail to clamp ±100 V spikes within 5 ns. Use Value: Limits voltage to ≤61.9 V during 25 A surge, preventing damage to MCU power supply and CAN transceivers. |
Use Scenario: Safeguarding 24 V digital input modules against EFT and inductive kickback from solenoids. IC Role / Device Role / Timing Role: Standoff protection element on field-side inputs, operating continuously at 24 V with <1 µA leakage. Use Value: Maintains signal integrity while absorbing 1500 W surges per IEC 61000-4-4, eliminating false triggering. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Port Protection |
|
Use Scenario: Clamping transients on constant-current LED driver outputs exposed to wiring harness coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS limiting output voltage excursion during hot-swap or cable discharge events. Use Value: Clamps to 61.9 V before LED string overvoltage exceeds 70 V, preserving luminous efficacy and lifetime. |
Use Scenario: Protecting RS-485 bus lines in factory automation systems from ground bounce and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional shunt device across differential pair (A/B) referenced to common-mode ground. Use Value: Suppresses ±30 kV ESD (IEC 61000-4-2) and 1 kV EFT (IEC 61000-4-4) without degrading signal rise/fall times. |
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 SMAJ43CA | DO-214AC (SMA) package, 400 W rating, lower PPK, higher VC = 69.4 V @ 17.3 A | Lower surge capacity suits consumer-grade 24 V systems; not AEC-Q101 qualified | Select when board space is constrained and 1500 W surge headroom is unnecessary |
| ON Semiconductor 1.5SMC43CA | DO-214AB (SMC) package, 1500 W rating, VC = 69.4 V @ 21.7 A, slightly higher clamping | Same power rating but larger footprint; compatible with automated SMT placement | Choose for SMT assembly compatibility where DO-201 through-hole is not feasible |
Compared with 1.5KE43CA R0G, SMAJ43CA offers smaller size but sacrifices 60% surge power and automotive qualification; 1.5SMC43CA matches power rating but requires PCB re-layout for SMC footprint and exhibits 12% higher clamping voltage - making 1.5KE43CA R0G optimal for high-energy, high-reliability through-hole deployments.
Availability
1.5KE43CA R0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, LED driver overvoltage clamping, and RS-485 port hardening requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE43CA R0G 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 MOSFETs for industrial and automotive markets.
The 1.5KE series was developed specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor reliability.
FAQ
What does the 'CA' suffix mean in 1.5KE43CA R0G?
The 'CA' suffix in 1.5KE43CA R0G indicates a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This differs from 'A' suffix parts (unidirectional only) and enables use across AC-coupled or floating signal lines without polarity concerns. The 1.5KE43CA R0G achieves this via back-to-back diode construction inside the DO-201 package.
Is 1.5KE43CA R0G AEC-Q101 qualified?
Yes, 1.5KE43CA R0G is AEC-Q101 qualified. Per Taiwan Semiconductor's ordering information and product documentation, the base 1.5KE43CA part (including R0G tape-and-reel variant) meets AEC-Q101 stress test requirements for automotive discrete semiconductors, including HTGB, HTRB, TCT, and mechanical shock testing - confirming suitability for under-hood and powertrain applications.
What is the clamping voltage of 1.5KE43CA R0G at its rated surge current?
The clamping voltage of 1.5KE43CA R0G is 61.9 V measured at 25 A peak pulse current (IPP) under the standard 10/1000 μs waveform. This value is specified in the Electrical Specifications table and represents the maximum voltage imposed on the protected circuit during a full-rated 1500 W transient event - critical for verifying margin against downstream IC absolute maximum ratings.
Can 1.5KE43CA R0G be used in place of unidirectional TVS diodes?
No - 1.5KE43CA R0G is strictly bidirectional and must not replace unidirectional TVS diodes (e.g., 1.5KE43A) in DC-biased circuits where polarity-sensitive clamping is required. Its symmetrical V-I curve provides equal protection for ± transients but lacks a defined anode/cathode functional distinction in DC operation. Substitution would compromise protection integrity in applications like 12 V rail clamping where forward conduction must be blocked.
What is the maximum working voltage (VWM) for 1.5KE43CA R0G?
The maximum working stand-off voltage (VWM) for 1.5KE43CA R0G is 34.8 V DC or RMS. This is the highest continuous voltage the device reliably blocks without exceeding 1 μA leakage current. It ensures safe operation on 24 V automotive or industrial systems with typical 30 V transients, providing ≥4.2 V margin below the minimum breakdown voltage of 38.7 V.
1.5KE43CA R0G 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 26A
- 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
1.5KE43CA R0G FAQ
1.How can I place an order for 1.5KE43CA R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CA R0G 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 1.5KE43CA R0G reliable?
The price and inventory of 1.5KE43CA R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CA R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE43CA R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CA R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CA R0G?
1.5KE43CA R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CA R0G 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 1.5KE43CA R0G?
For technical support, including 1.5KE43CA R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CA R0G requirements.
6.How does Aetrix verify that 1.5KE43CA R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CA R0G 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 1.5KE43CA R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE43CA R0G?
All 1.5KE43CA R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CA R0G, 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 1.5KE43CA R0G part is unused and in its original packaging.
Return procedure for 1.5KE43CA R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CA R0G Tags
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