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Taiwan Semiconductor Corporation 1.5KE51A R0G
- Part No.:
- 1.5KE51A R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51A R0G.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,306
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Product details
Overview
1.5KE51A R0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 51V, working stand-off voltage 43.6V, clamping voltage 70.1V at 22A peak pulse current, and junction temperature rating up to +175°C - designed for automotive and industrial power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE51A R0G datasheet, 1.5KE51A R0G pinout, 1.5KE51A R0G application, or 1.5KE51A R0G equivalent, this page delivers verified electrical parameters, mechanical package details, real-world use scenarios, and validated alternative parts - all specific to the 1.5KE51A R0G variant with AEC-Q101 qualification and green compound marking.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 43.6V (VWM), triggers avalanche conduction at 48.5–53.6V (VBR @ 1mA), and limits transient energy by clamping to ≤70.1V at 22A (IPP), dissipating up to 1500W for 10/1000μs pulses. Its low dynamic impedance ensures rapid response (<1.0ps from 0V to VBR).
Designed for harsh environments, the 1.5KE51A R0G meets AEC-Q101 stress requirements and ISO 7637-2 immunity standards. It features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and a maximum leakage current of 1μA at 43.6V - enabling reliable long-term operation in automotive power electronics and industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous DC or RMS operating voltage before conduction begins; ensures no false triggering on 36V automotive systems. |
| VBR @ IT=1mA | 48.5–53.6 V - Verified breakdown range at 1mA test current; defines precise turn-on threshold for transient suppression. |
| VC @ IPP=22A | 70.1 V - Clamping voltage under 22A 10/1000μs surge; guarantees downstream ICs see <70.1V during worst-case transients. |
| PPK | 1500 W - Peak pulse power handling per JEDEC standard; supports robust protection against load dump and inductive switching events. |
| TJ max | +175°C - Maximum junction temperature; enables operation in under-hood automotive locations and high-ambient industrial enclosures. |
| ID @ VWM | <1 μA - Blocking leakage at rated stand-off voltage; minimizes standby power loss and avoids false system resets. |
| Package | DO-201 - Axial leaded, through-hole package with 0.090g mass and UL 94V-0 flammability rating; compatible with legacy PCB layouts and wave soldering. |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking. Cathode terminal is marked with a colored band; anode is unmarked. 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 | Low-side reference node | Connected to ground or low-voltage return path; completes shunt path during overvoltage event. |
| Cathode | High-side protected node | Connected to protected line (e.g., 36V supply rail); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| 1500W 10/1000μs surge rating | Withstands full ISO 7637-2 Pulse 5a (load dump) without degradation - eliminates need for external series impedance in many 12V/24V designs. |
| Clamping voltage ≤70.1V @ 22A | Provides ≥10V margin below typical 80V automotive absolute maximum ratings - protects CAN transceivers, microcontrollers, and power management ICs. |
| Leakage <1μA @ 43.6V | Enables direct placement across always-on rails (e.g., battery backup lines) without measurable quiescent current penalty. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports sustainability compliance for global OEM programs. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a) on 24V truck battery-fed ECUs. IC Role / Device Role / Timing Role: Shunt clamping device placed directly across input rail, triggered within <1.0ps to divert surge energy to ground. Use Value: Limits rail voltage to ≤70.1V during 1500W surges, preventing damage to 80V-rated DC-DC controllers and CAN FD transceivers. |
Use Scenario: Protects 24V digital input modules in factory automation systems from inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Unidirectional TVS connected between field input and internal LDO regulator input. Use Value: Clamps 10/1000μs transients to 70.1V while maintaining <1μA leakage - avoids false triggering of optocouplers and preserves signal integrity. |
| LED Driver Overvoltage Clamp | Telecom Power Interface Protection |
|
Use Scenario: Safeguards constant-current LED drivers in outdoor signage against lightning-induced surges on 36V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on driver input, coordinated with upstream fuse and downstream ceramic capacitor. Use Value: Absorbs 1500W surge energy without thermal runaway, preserving driver MOSFETs and current-sense amplifiers rated for 60V max. |
Use Scenario: Shields PoE-powered network switches from fast transients entering via 48V DC input from midspan injectors. IC Role / Device Role / Timing Role: First-line transient suppressor before DC-DC converter input stage. Use Value: Responds in <1.0ps and clamps to 70.1V, ensuring downstream 100V-rated silicon remains within safe SOA during EFT bursts. |
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 SMAJ51A | Same DO-214AC (SMA) package; lower PPK (400W); VBR 48.5–53.6V; VC = 82.4V @ 4.9A. | Lower surge capacity suits consumer-grade 24V systems but insufficient for ISO 7637-2 Pulse 5a automotive load dump. | Select only where space-constrained SMT layout is mandatory and surge energy is limited to ≤400W. |
| ON Semiconductor 1.5SMC51A | DO-214AB (SMC) package; same 1500W rating; VBR 48.5–53.6V; VC = 70.1V @ 22A; AEC-Q101 not specified. | Identical electrical performance but lacks AEC-Q101 qualification - acceptable for industrial, not automotive OEM use. | Choose when AEC-Q101 is not required and board space allows larger SMC footprint. |
Compared with 1.5KE51A R0G, SMAJ51A offers surface-mount compatibility at the cost of 73% lower surge power handling, while 1.5SMC51A matches 1500W performance in a different package but omits automotive qualification - making 1.5KE51A R0G the sole option meeting both high-energy clamping and AEC-Q101 requirements in DO-201.
Availability
1.5KE51A R0G is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC input conditioning, and LED driver overvoltage protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE51A 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 engineered specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, high surge robustness, and consistent clamping performance across temperature - targeting 12V/24V/36V power rail protection.
FAQ
What is the exact breakdown voltage range for 1.5KE51A R0G?
The 1.5KE51A R0G has a guaranteed breakdown voltage range of 48.5 V to 53.6 V at 1 mA test current (IT), per Taiwan Semiconductor's O2104 datasheet revision. This range reflects manufacturing tolerance and ensures reliable triggering above the 43.6 V working stand-off voltage while staying well below the 70.1 V clamping voltage - critical for protecting 60V-rated downstream components in automotive and industrial systems.
Is 1.5KE51A R0G AEC-Q101 qualified?
Yes, 1.5KE51A R0G is AEC-Q101 qualified, as confirmed in the "FEATURES" section and "ORDERING INFORMATION" of the official Taiwan Semiconductor datasheet (Version O2104). The "H" suffix in alternate ordering codes (e.g., 1.5KE51AH) explicitly denotes AEC-Q101 compliance, and the R0G marking indicates green compound - both aligned with automotive-grade process controls and stress testing requirements.
What is the clamping voltage of 1.5KE51A R0G under surge conditions?
The 1.5KE51A R0G clamps to a maximum of 70.1 V at 22 A peak impulse current (IPP), measured using the standard 10/1000 μs double-exponential waveform. This value is specified in the Electrical Specifications table and represents the upper limit of voltage seen by protected circuitry during worst-case transients - providing ≥10 V safety margin for 80 V absolute maximum rated ICs commonly used in automotive power domains.
Does 1.5KE51A R0G have bidirectional capability?
No, 1.5KE51A R0G is a unidirectional TVS diode, as indicated by its "A" suffix and absence of bidirectional electrical specifications in its row of the datasheet table. It conducts only when cathode-to-anode voltage exceeds VBR; reverse polarity protection requires a separate device or a dedicated bidirectional part such as 1.5KE51CA. The cathode band marking on the DO-201 body confirms polarity orientation.
What packaging and reel options are available for 1.5KE51A R0G?
1.5KE51A R0G is supplied in DO-201 package with tape-and-reel packing: 1,250 units per reel (ordering code 1.5KE51AH). The "R0G" suffix denotes green compound and standard commercial temperature grade (–55°C to +175°C). Ammo box packaging (500 units) is available under alternate codes like 1.5KE51A A0G, but R0G specifically references the tape-and-reel configuration with halogen-free, RoHS-compliant materials.
1.5KE51A 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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 22A
- 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
1.5KE51A R0G FAQ
1.How can I place an order for 1.5KE51A R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51A 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 1.5KE51A R0G reliable?
The price and inventory of 1.5KE51A R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE51A R0G is usually 5 days.
3.What payment methods are accepted for 1.5KE51A R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51A R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51A R0G?
1.5KE51A R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51A 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 1.5KE51A R0G?
For technical support, including 1.5KE51A R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51A R0G requirements.
6.How does Aetrix verify that 1.5KE51A R0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE51A 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 1.5KE51A R0G meets industry standards.
7.What is the process for return or replacement of 1.5KE51A R0G?
All 1.5KE51A R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51A 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 1.5KE51A R0G part is unused and in its original packaging.
Return procedure for 1.5KE51A R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51A R0G Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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