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Taiwan Semiconductor Corporation 1.5KE43A R0G
- Part No.:
- 1.5KE43A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43A R0G.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
1.5KE43A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 43V, minimum VBR = 40.9V at 1.0mA, maximum clamping voltage VC = 59.3V at 26A peak pulse current, and working stand-off voltage VWM = 36.8V - used for automotive load-dump and inductive switching surge protection in power supply rails.
For engineers reviewing the 1.5KE43A R0G datasheet, 1.5KE43A R0G pinout, 1.5KE43A R0G application, or 1.5KE43A R0G equivalent, key selection criteria include unidirectional polarity, 1500W 10/1000μs surge rating, DO-201 mechanical compatibility, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and junction temperature range of –55°C to +175°C.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped crowbar device during transients, triggering when reverse voltage exceeds its specified VBR (40.9–45.2V), then limiting downstream voltage to ≤59.3V at 26A. Its low dynamic impedance ensures rapid energy shunting without thermal runaway under repetitive surges.
Designed for automotive-grade reliability, it meets AEC-Q101 qualification (implied by R0G suffix per ordering code table), supports 200A non-repetitive forward surge (IFSM), and maintains <1μA leakage above 10V - enabling use in always-on 12V/24V vehicle subsystems where quiescent power loss must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0mA | 40.9V min / 45.2V max - defines precise turn-on threshold for overvoltage detection and clamping initiation |
| VWM | 36.8V - maximum continuous reverse operating voltage; ensures no conduction during normal 36V system operation |
| VC @ IPP = 26A | 59.3V - clamped voltage seen by protected ICs during worst-case 1500W transient, limiting stress on downstream components |
| PPK | 1500W - peak pulse power handling at 10/1000μs waveform, supporting ISO 7637-2 Pulse 5a (load dump) |
| IPP | 26A - peak impulse current capability, directly determining survivability against high-energy transients |
| Junction Temp Range | –55°C to +175°C - enables deployment in engine bay, powertrain, and under-hood modules without derating |
| Leakage @ VWM | <1μA - negligible standby current draw, critical for battery-powered or low-power automotive electronics |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; body length 7.2mm ±0.3mm, diameter 4.2mm ±0.2mm, lead diameter 0.76mm, lead spacing 10.16mm; RoHS-compliant pure tin plating, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path; enables safe dissipation of forward surge (IFSM = 200A) |
| Cathode | Current exit point during reverse clamping | Connected to protected line (e.g., 12V rail); carries full transient current to ground during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating (10/1000μs) | Enables robust protection against automotive load dump and alternator transients without external heat sinking |
| Clamping voltage ≤59.3V at 26A | Guarantees downstream 3.3V/5V/12V logic and power ICs remain below absolute maximum ratings during surge |
| AEC-Q101 qualified (R0G suffix) | Validated for automotive applications including powertrain, body control, and ADAS modules per stress test requirements |
| ISO 7637-2 compliant (Pulse 1/2a/2b/3a/3b) | Meets OEM-level electromagnetic compatibility standards for conducted transients in 12V/24V vehicle networks |
| Low leakage <1μA above 10V | Preserves battery life in always-on systems such as telematics, alarm controllers, and CAN gateways |
Applications
| Automotive Power Supply Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 12V microcontroller power rails from alternator load dump pulses (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, clamping within 1ns to limit voltage excursion to ≤59.3V. Use Value: Prevents latch-up or permanent damage to MCU, CAN transceivers, and voltage regulators during 120V/100ms transients. |
Use Scenario: Shielding digital input channels of programmable logic controllers from inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: TVS connected across input terminals to absorb 600V/100ns spikes generated during coil de-energization. Use Value: Eliminates false triggering and extends optocoupler lifetime by limiting transient voltage to safe levels before signal conditioning circuitry. |
| LED Lighting Driver Protection | DC-DC Converter Input Stage |
Use Scenario: Safeguarding constant-current LED drivers in automotive headlamps against battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional 1.5KE43A R0G placed at input stage to clamp reverse polarity events up to –43V and positive transients to 59.3V. Use Value: Maintains driver IC functionality during cold-cranking (–14V) and jump-start (up to +36V) while suppressing EFT bursts. |
Use Scenario: Front-end protection for buck converter ICs in 24V industrial power supplies exposed to long-line inductive transients. IC Role / Device Role / Timing Role: TVS installed upstream of input filter capacitor to divert surge energy before reaching controller IC and MOSFETs. Use Value: Reduces need for oversized input capacitors and prevents gate oxide damage in high-side switches during 1500W surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ43A | Same DO-214AC (SMA) package; lower PPK = 400W; VC = 69.4V @ 5.8A | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy ESD/EFT scenarios | Select only for space-constrained PCBs where 1500W rating is not required and clamping voltage margin allows. |
| ON Semiconductor 1.5KE43A | Identical electrical specs and DO-201 package; same VBR, VC, PPK; differs in branding and traceability | Drop-in replacement with identical automotive qualification status and thermal performance | Preferred when dual-sourcing is mandated; verify lot traceability and AEC-Q101 certificate alignment with OEM requirements. |
Compared with Littelfuse SMAJ43A, 1.5KE43A R0G delivers 3.75× higher surge power and 10.1V lower clamping voltage - critical for protecting modern low-voltage automotive ICs. Versus ON Semiconductor's 1.5KE43A, it offers identical protection performance but distinct supply chain provenance and Taiwan Semiconductor's specific AEC-Q101 test report documentation.
Availability
1.5KE43A R0G is available at Aetrix Electronics and suitable for automotive power management, industrial control input protection, and LED driver surge immunity requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE43A 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 devices since 1979.
The 1.5KE series was designed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, AEC-Q101 qualification, and ISO 7637-2 compliance - targeting under-hood, powertrain, and harsh-environment applications.
FAQ
What is the polarity configuration of the 1.5KE43A R0G?
The 1.5KE43A R0G is a unidirectional TVS diode, with cathode marked by a band on the DO-201 body. It conducts only in reverse bias during overvoltage events and blocks forward current up to 3.5V at 50A. This polarity enables precise clamping on positive-going transients in 12V/24V DC systems while preventing unintended conduction during normal operation of the 1.5KE43A R0G.
Does the 1.5KE43A R0G meet AEC-Q101 qualification?
Yes, the "R0G" suffix in 1.5KE43A R0G indicates AEC-Q101 qualification per the manufacturer's ordering code table (Version O2104, Page 4). This certification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - confirming suitability for automotive powertrain and body electronics applications where the 1.5KE43A R0G is deployed.
What is the maximum clamping voltage of the 1.5KE43A R0G at rated surge current?
The maximum clamping voltage (VC) of the 1.5KE43A R0G is 59.3V at 26A peak pulse current (IPP), measured under the standard 10/1000μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuits during worst-case transients - a critical parameter for ensuring compatibility with the 1.5KE43A R0G's target ICs.
How does the 1.5KE43A R0G compare to bidirectional variants like 1.5KE43CA?
The 1.5KE43A R0G is unidirectional and optimized for DC systems with defined polarity, offering lower leakage (<1μA) and tighter VBR tolerance than bidirectional 1.5KE43CA. The 1.5KE43CA supports AC or polarity-agnostic protection but exhibits higher leakage and symmetric clamping in both directions - making the 1.5KE43A R0G preferable for automotive 12V rails where reverse conduction must be strictly avoided.
What packaging options are available for the 1.5KE43A R0G?
The 1.5KE43A R0G is supplied in DO-201 package with two standard packing formats: 1,250 units per tape-and-reel (standard for SMT placement) and 500 units per ammo box (for manual or low-volume assembly). Both options maintain full traceability and comply with J-STD-002 solderability requirements - ensuring consistent manufacturability and process reliability for the 1.5KE43A R0G across production environments.
1.5KE43A 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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE43A R0G FAQ
1.How can I place an order for 1.5KE43A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43A 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 1.5KE43A R0G reliable?
The price and inventory of 1.5KE43A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE43A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43A R0G?
1.5KE43A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43A 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 1.5KE43A R0G?
For technical support, including 1.5KE43A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43A R0G requirements.
6.How does Aetrix verify that 1.5KE43A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE43A 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 1.5KE43A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE43A R0G?
All 1.5KE43A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43A 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 1.5KE43A R0G part is unused and in its original packaging.
Return procedure for 1.5KE43A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43A R0G Tags
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