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Taiwan Semiconductor Corporation 1.5KE51A B0G
- Part No.:
- 1.5KE51A B0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51A B0G.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,981
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Product details
Overview
1.5KE51A B0G from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 51 V, working stand-off voltage 43.6 V, clamping voltage 70.1 V at 22 A peak pulse current, and junction temperature range −55 °C to +175 °C - used for automotive ECU power rail protection against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE51A B0G datasheet, 1.5KE51A B0G pinout, 1.5KE51A B0G application, or 1.5KE51A B0G equivalent, this page delivers verified electrical parameters, mechanical packaging details, real-world clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, and direct alternative part comparisons for automotive-grade circuit hardening.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 43.6 V (VWM), triggers avalanche conduction at 48.5–53.6 V (VBR @ 1 mA), and limits transient voltage to ≤70.1 V (VC) during 22 A (IPP) 10/1000 μs surges. Its <1.0 ps response time ensures sub-nanosecond turn-on from 0 V to VBR.
Designed for automotive environments, it meets ISO 7637-2 immunity requirements and is AEC-Q101 qualified (per ordering code suffix "H" variants); the B0G suffix indicates green, halogen-free DO-201 packaging with pure tin leads compliant to J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets safe DC bias margin for 48 V systems. |
| VBR @ IT=1 mA | 48.5–53.6 V - verified avalanche onset range; ensures reliable triggering above system nominal voltage. |
| VC @ IPP=22 A | 70.1 V - clamped voltage during 10/1000 μs surge; defines worst-case stress on downstream ICs. |
| PPK | 1500 W - peak pulse power rating at TA = 25 °C; derates linearly above ambient per Fig.2. |
| Junction Temp | −55 °C to +175 °C - extended thermal range enables under-hood deployment without derating. |
| Package | DO-201 - axial-leaded, UL 94V-0 molded case; supports manual or wave soldering with 0.090 g mass. |
Pinout & Package
DO-201 package: axial leaded, cylindrical epoxy body with cathode band marking. Cathode terminal is marked by a band; anode is unmarked end. Leads are pure tin plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line (e.g., 48 V rail); conducts surge current to ground when V > VBR. |
| Anode (unmarked end) | Reference node | Typically tied to system ground; completes shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test profile including temperature cycling, HTRB, and ESD; required for ECU front-end protection. |
| 1500 W surge rating | Sustains single 10/1000 μs transients up to 1500 W without degradation - sufficient for ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect). |
| Clamping ratio VC/VBR | ≤1.45 (70.1 V / 48.5 V) - low ratio minimizes voltage overshoot across protected ICs during fast transients. |
| Leakage current | <1 µA at 43.6 V - negligible standby power loss and no measurable loading on 48 V supply rails. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48 V DC Power Distribution |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver power pins from load-dump transients during alternator regulation faults. IC Role / Device Role: Shunt clamping element placed between 48 V rail and chassis ground, triggered only during >48.5 V excursions. Use Value: Limits rail voltage to 70.1 V during 1500 W surges, preventing latch-up or gate oxide damage in 5 V/3.3 V logic supplies derived from the same rail. | Use Scenario: Safeguarding programmable logic controllers (PLCs) powered from 48 V industrial bus against switching-induced voltage spikes from solenoid valves. IC Role / Device Role: Primary overvoltage clamp on main 48 V input, upstream of DC-DC converters and isolation barriers. Use Value: Absorbs 22 A peak impulse current while holding clamped voltage below 71 V - within absolute max ratings of downstream 75 V-rated MOSFETs and regulators. |
| LED Headlamp Driver Circuit | Telecom Remote Radio Unit (RRU) Power Input |
Use Scenario: Suppressing ESD and inductive kickback from high-current LED string drivers in automotive headlamps. IC Role / Device Role: Unidirectional TVS placed across driver output terminals to clamp flyback voltage during PWM turn-off. Use Value: Responds in <1.0 ps to limit voltage overshoot to 70.1 V, protecting 60 V-rated GaN FETs and current-sense amplifiers from destructive breakdown. | Use Scenario: Hardening 48 V PoE-like power input of outdoor RRUs against lightning-induced surges and AC coupling transients. IC Role / Device Role: First-stage transient suppressor before DC-DC conversion and hot-swap controller. Use Value: Withstands 1500 W surges per 10/1000 μs waveform and maintains <1 µA leakage at 43.6 V - preserving efficiency in always-on telecom equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ51A | Same DO-214AC (SMA) package; 51 V nominal, 70.1 V clamping at 21.5 A; 400 W rating (vs. 1500 W). | Lower peak power handling limits use to lower-energy transients (e.g., ESD-only); unsuitable for ISO 7637-2 Pulse 1. | Select only where space-constrained layouts preclude DO-201 and surge energy is ≤400 W. |
| ON Semiconductor 1.5SMC51A | DO-214AB (SMC) package; 51 V nominal, 70.1 V clamping at 21.3 A; 1500 W rating; RoHS/halogen-free compliant. | Same power rating and clamping but larger SMC footprint; thermal resistance differs due to package geometry. | Choose when board layout accommodates SMC and thermal management favors larger pad area over axial leads. |
Compared with 1.5KE51A B0G, SMAJ51A offers smaller size but sacrifices 73% peak power capacity, making it inadequate for automotive load-dump protection; 1.5SMC51A matches 1500 W capability and clamping performance but requires PCB redesign for SMC footprint and altered thermal relief.
Availability
1.5KE51A B0G is available at Aetrix Electronics and suitable for automotive electronic control units, industrial 48 V power distribution systems, and LED lighting driver circuits requiring stable component supply with AEC-Q101 assurance and long-term lifecycle continuity.
Supply support for 1.5KE51A B0G 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 specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh automotive environments, emphasizing AEC-Q101 compliance, robust DO-201 packaging, and precise clamping performance across −55 °C to +175 °C.
FAQ
What is the clamping voltage of the 1.5KE51A B0G under standard 10/1000 μs surge conditions?
The 1.5KE51A B0G clamps to a maximum of 70.1 V when subjected to a 22 A peak impulse current with a 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized surge events per IEC 61000-4-5 and ISO 7637-2.
Is the 1.5KE51A B0G AEC-Q101 qualified?
The 1.5KE51A B0G itself is not AEC-Q101 qualified; qualification applies only to variants with "H" suffix (e.g., 1.5KE51AH). The B0G suffix denotes halogen-free, green molding compound and tin-plated leads - confirming RoHS and JESD 201 Class 2 compliance, but not automotive stress testing.
What is the maximum working stand-off voltage (VWM) for the 1.5KE51A B0G?
The maximum working stand-off voltage (VWM) for the 1.5KE51A B0G is 43.6 V. This is the highest DC or continuous reverse voltage the device can withstand without exceeding 1 µA leakage current, establishing its safe operating margin below the 48.5–53.6 V breakdown range.
How does the 1.5KE51A B0G compare to bidirectional TVS diodes like 1.5KE51CA?
The 1.5KE51A B0G is unidirectional and intended for DC line protection with defined polarity; 1.5KE51CA is bidirectional and suited for AC or differential signal lines. Their VBR, VC, and PPK ratings are identical, but 1.5KE51A B0G has a cathode band for orientation-sensitive placement, whereas 1.5KE51CA lacks polarity marking and conducts in both directions.
What is the thermal resistance junction-to-ambient (RθJA) for the 1.5KE51A B0G in DO-201 package?
Taiwan Semiconductor does not publish RθJA for the 1.5KE51A B0G in free-air conditions; instead, the datasheet provides derating curves (Fig.2) showing 1500 W peak power is rated at TA = 25 °C and drops linearly to ~1000 W at 75 °C ambient - implying effective thermal management requires minimal copper area or heat sinking for sustained surge duty.
1.5KE51A B0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- 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 B0G FAQ
1.How can I place an order for 1.5KE51A B0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51A B0G 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 B0G reliable?
The price and inventory of 1.5KE51A B0G 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 B0G is usually 5 days.
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Once your 1.5KE51A B0G 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 B0G?
For technical support, including 1.5KE51A B0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51A B0G requirements.
6.How does Aetrix verify that 1.5KE51A B0G is sourced from the original manufacturer or authorized distributors?
All 1.5KE51A B0G 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 B0G meets industry standards.
7.What is the process for return or replacement of 1.5KE51A B0G?
All 1.5KE51A B0G units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51A B0G, 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 B0G part is unused and in its original packaging.
Return procedure for 1.5KE51A B0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51A B0G Tags
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