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Taiwan Semiconductor Corporation 1.5KE33A R0G
- Part No.:
- 1.5KE33A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33A R0G.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,401
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Product details
Overview
1.5KE33A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 33V, working stand-off voltage 28.2V, clamping voltage 45.7V at 34A peak pulse current, and fast response time <1.0ps - deployed for automotive power line surge protection per ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the 1.5KE33A R0G datasheet, 1.5KE33A R0G pinout, 1.5KE33A R0G application, or 1.5KE33A R0G equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, peak pulse current handling under 10/1000μs waveform, thermal derating above 25°C ambient, and AEC-Q101 qualification status for automotive use.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VBR (31.4–34.7V at 1mA), limiting downstream voltage to ≤45.7V at 34A IPP. It exhibits low dynamic impedance and typical reverse leakage <1μA at 28.2V VWM.
Designed for single-polarity DC lines, it supports fast transient suppression with sub-nanosecond response and meets ISO 7637-2 immunity requirements for automotive electronics. Its DO-201 package enables surface-mount or through-hole mounting with 0.090g mass and UL 94V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 31.4–34.7V - defines minimum voltage at which avalanche conduction begins; sets lower bound of clamping window |
| VWM | 28.2V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC @ IPP=34A | 45.7V - peak clamped voltage during 10/1000μs surge; must stay below protected circuit's absolute max rating |
| PPK | 1500W - peak pulse power dissipation capability at TA=25°C; derates linearly above 25°C per Fig.2 |
| IPP | 34A - maximum non-repetitive peak impulse current the device sustains without failure at 10/1000μs waveform |
| TJ max | +175°C - maximum junction temperature; enables operation in under-hood automotive environments |
| Response time | <1.0ps - time from 0V to VBR; ensures suppression before transient energy couples into sensitive nodes |
Pinout & Package
DO-201 axial package with cathode band marking; two-terminal device - anode and cathode - mounted with cathode band oriented toward positive rail in unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for clamping | Connected to ground or low-side return path; establishes reference for voltage threshold detection |
| Cathode | Transient input node | Connected to protected line (e.g., 24V supply rail); avalanche conduction occurs from cathode to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating | Supports high-energy transients such as load dump (ISO 7637-2 Pulse 5a) without degradation |
| AEC-Q101 qualified option | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Clamping voltage 45.7V @ 34A | Provides ≥12.3V margin below typical 58V automotive load-dump clamp limit, protecting 48V system ICs |
| Low leakage <1μA @ 28.2V | Minimizes standby power loss in always-on vehicle modules (e.g., body control units) |
| DO-201 mechanical robustness | UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance ensure long-term field reliability |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and jump-start surges on 24V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before LDO or DC-DC converter. Use Value: Limits voltage to ≤45.7V during 34A 10/1000μs surge, preventing damage to 48V-tolerant PMICs and microcontrollers. | Use Scenario: Protecting RS-485 transceivers and analog sensor front-ends from EFT bursts in factory automation PLCs. IC Role / Device Role / Timing Role: TVS installed at connector entry point to shunt fast transients (<1ns rise) induced by relay switching or motor drives. Use Value: Sub-1ps response ensures clamping initiates before EFT pulse edge propagates into signal conditioning circuitry. |
| LED Lighting Driver Protection | Power Supply Input Stage Clamping |
Use Scenario: Safeguarding constant-current LED drivers against inductive kickback from magnetic ballasts or solenoid controls. IC Role / Device Role / Timing Role: TVS connected across driver input terminals to absorb stored inductor energy during MOSFET turn-off. Use Value: 1500W peak power rating handles repetitive 10/1000μs pulses common in HID lighting ballast circuits. | Use Scenario: Front-end surge suppression for AC/DC adapters and industrial SMPS inputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-side TVS placed after bridge rectifier to clamp differential-mode transients before bulk capacitor. Use Value: 45.7V clamping voltage provides safe margin below 63V-rated bulk capacitors used in 36V-output supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | DO-214AA package; 600W rating; VC=53.3V @ 11.8A; same VWM/VBR range | Lower surge capacity limits use to lighter-duty 12V systems; not AEC-Q101 qualified in standard grade | Select when board space constraints favor SMD and surge energy is ≤600W |
| 1.5SMC33A | DO-214AB package; 1500W rating; VC=53.3V @ 28.3A; slightly higher clamping voltage than 1.5KE33A R0G | Same power rating but 7.6V higher clamping reduces margin for 3.3V/5V logic rails; RoHS-compliant but no AEC-Q101 variant | Select when DO-214AB footprint is preferred and clamping margin allows 53.3V peak |
Compared with SMBJ33A and 1.5SMC33A, the 1.5KE33A R0G delivers superior clamping performance (45.7V vs. ≥53.3V) and AEC-Q101 qualification - critical for automotive 24V systems where voltage margin and reliability validation are mandatory.
Availability
1.5KE33A R0G is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE33A 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 semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The 1.5KE series was engineered specifically for high-energy transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 compliance, robust DO-201 packaging, and precise clamping voltage control across wide temperature ranges.
FAQ
What is the clamping voltage of the 1.5KE33A R0G under standard test conditions?
The 1.5KE33A R0G has a maximum clamping voltage (VC) of 45.7V at 34A peak pulse current (IPP) using the 10/1000μs waveform. This value is measured per JEDEC standards and represents the upper voltage limit imposed on the protected circuit during surge events - critical for ensuring compatibility with 48V-tolerant ICs in automotive applications. The 1.5KE33A R0G maintains this clamping performance across its full operating temperature range.
Is the 1.5KE33A R0G AEC-Q101 qualified?
The base 1.5KE33A R0G part is not AEC-Q101 qualified; however, Taiwan Semiconductor offers AEC-Q101 variants in the same family designated with an "H" suffix (e.g., 1.5KE33AH). The 1.5KE33A R0G shares identical electrical specifications and DO-201 packaging with its AEC-Q101 counterpart but lacks the extended reliability testing required for automotive under-hood deployment. For automotive-grade designs, specify the H-suffix version.
What is the working stand-off voltage (VWM) of the 1.5KE33A R0G, and why does it matter?
The 1.5KE33A R0G has a working stand-off voltage (VWM) of 28.2V - the maximum continuous DC or RMS voltage it can block without exceeding 1μA leakage current. This parameter ensures the device remains non-conductive during normal operation while allowing sufficient margin below the 33V nominal breakdown voltage. Selecting a VWM ≥10–15% above system operating voltage prevents false triggering and minimizes standby power loss in 24V automotive systems.
How does the 1.5KE33A R0G compare to bidirectional TVS diodes like 1.5KE33CA?
The 1.5KE33A R0G is unidirectional and intended for DC line protection with polarity-sensitive placement (cathode to positive rail), whereas 1.5KE33CA is bidirectional and symmetric - suitable for AC lines or data lines where voltage polarity reverses. The 1.5KE33A R0G achieves lower clamping voltage (45.7V vs. ~47.7V for 1.5KE33CA) and supports forward conduction, enabling use in DC power paths where reverse blocking is required. Use 1.5KE33A R0G for 24V supply rail protection; choose 1.5KE33CA only for balanced signal lines.
What package type does the 1.5KE33A R0G use, and what are its mechanical characteristics?
The 1.5KE33A R0G uses the DO-201 axial leaded package: cylindrical body with tinned copper leads, UL 94V-0 rated epoxy molding compound, and cathode band marking. It weighs approximately 0.090g and meets JESD201 Class 2 whisker resistance. Lead finish is pure tin, solderable per J-STD-002. The DO-201 package supports both through-hole and surface-mount (with bent leads) assembly and provides robust thermal dissipation for high-power transient absorption in constrained spaces.
1.5KE33A 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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
1.5KE33A R0G FAQ
1.How can I place an order for 1.5KE33A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33A 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 1.5KE33A R0G reliable?
The price and inventory of 1.5KE33A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE33A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33A R0G?
1.5KE33A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33A 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 1.5KE33A R0G?
For technical support, including 1.5KE33A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33A R0G requirements.
6.How does Aetrix verify that 1.5KE33A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE33A 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 1.5KE33A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE33A R0G?
All 1.5KE33A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33A 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 1.5KE33A R0G part is unused and in its original packaging.
Return procedure for 1.5KE33A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33A R0G Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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