My Inquiry
My Account
Taiwan Semiconductor Corporation 1V5KE43A
- Part No.:
- 1V5KE43A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE43A.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,180
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1V5KE43A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-201 package, rated for 1500W peak pulse power at 1.0ms, with breakdown voltage 40.9–45.2V, reverse stand-off voltage 36.8V, and clamping voltage 59.3V at 25.3A. It protects power rails and I/O lines against ESD and lightning-induced surges in industrial power supplies and automotive control modules.
For engineers reviewing the 1V5KE43A datasheet, 1V5KE43A pinout, 1V5KE43A application, or 1V5KE43A equivalent, key selection criteria include verified clamping performance under 10/1000μs surge, low leakage (<5μA at VRWM), RoHS/halogen-free compliance, and DO-201 mechanical compatibility with legacy PCB footprints.
Technical Context
The 1V5KE43A operates as a silicon avalanche diode with glass-passivated junction, enabling fast response time (<1.0ps) and stable breakdown characteristics across temperature. Its unidirectional polarity supports DC-biased protection paths where reverse conduction must be blocked until clamping threshold is exceeded.
Designed for single-pulse transients per JEDEC JESD22-A114F, it delivers 59.3V clamping at 25.3A IPPM with incremental surge resistance of ~1.7Ω, and maintains <1μA IR above 10V - critical for low-power sensor interface protection without loading bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (1ms) | 1500W - sustains IEEE C62.41 Category A/B surge events without degradation |
| Breakdown Voltage VBR | 40.9–45.2V @ 1mA - defines precise avalanche onset for predictable clamping onset |
| Reverse Stand-off Voltage VRWM | 36.8V - maximum continuous DC or RMS voltage before leakage exceeds 5μA |
| Clamping Voltage VC | 59.3V @ 25.3A - limits downstream IC stress during worst-case 10/1000μs surge |
| Junction Temperature Range | −55°C to +175°C - supports operation in under-hood automotive and industrial motor drive environments |
| Package | DO-201 - industry-standard axial leaded package with 0.375" lead length, UL 94V-0 molding |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker test. Weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-impedance return path; carries full surge current during clamping |
| Cathode | Protected line input | Connected to line being protected (e.g., 24V rail); blocks reverse current until VBR is exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| Low incremental surge resistance | ~1.7Ω - minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts) |
| Fast response time | <1.0ps - activates before sensitive CMOS inputs can be damaged by sub-nanosecond ESD events |
| RoHS & halogen-free | Complies with IEC 61249-2-21 - meets environmental requirements for industrial and automotive end equipment |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24V DC input rail in programmable logic controller (PLC) power stage exposed to load dump and inductive switching spikes. IC Role / Device Role: Primary overvoltage clamp placed between input connector and upstream DC-DC converter. Use Value: Clamps 10/1000μs surges to ≤59.3V, preventing damage to 36V-rated input capacitors and controller ICs. | Use Scenario: LIN bus transceiver power supply line in door module subjected to ISO 7637-2 Pulse 1/2a/5a transients. IC Role / Device Role: Unidirectional TVS on VBAT-supplied rail feeding LIN PHY and microcontroller LDO. Use Value: Maintains VRWM = 36.8V margin below nominal 36V battery max, ensuring no false triggering during cranking. |
| LED Driver Surge Protection | Factory Automation Sensor Interface |
Use Scenario: Constant-current LED driver input in high-bay lighting fixture subject to lightning-induced surges on AC mains. IC Role / Device Role: Secondary surge clamp after MOV, absorbing residual energy that bypasses primary protection. Use Value: 1500W rating handles residual 1kV/500A surge tail, extending lifetime of bridge rectifier and primary FET. | Use Scenario: 4–20mA analog input channel in distributed I/O terminal exposed to ESD from field wiring. IC Role / Device Role: Low-leakage TVS on signal line before precision op-amp front-end. Use Value: IR <5μA at 36.8V avoids gain error in 250Ω shunt-based current sensing circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package; 600W rating; VBR = 47.8–52.8V; VC = 69.4V @ 8.6A | Lower power handling; surface-mount only; higher clamping voltage | Preferred for space-constrained PCBs where 1500W surge margin is not required |
| 1N6286A | Same manufacturer, identical electrical specs and DO-201 package; obsolete part number superseded by 1V5KE43A | No functional difference; same footprint and reliability data | Direct replacement for legacy designs using 1N6286A; updated marking and traceability |
Compared with SMBJ43A, the 1V5KE43A provides 2.5× higher surge power margin and lower clamping voltage for robust protection in high-energy environments; compared with 1N6286A, it offers identical performance with enhanced manufacturing traceability and RoHS/halogen-free compliance.
Availability
1V5KE43A is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, and LED driver surge suppression requiring stable component supply and long-lifecycle support.
Supply support for 1V5KE43A 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, with ISO/TS 16949 and IATF 16949 certification.
The 1V5KE series was developed specifically for high-reliability transient suppression in harsh-environment applications including automotive, industrial automation, and outdoor lighting, emphasizing stable VBR tolerance and surge endurance.
FAQ
What is the maximum clamping voltage of the 1V5KE43A under standard test conditions?
The 1V5KE43A has a maximum clamping voltage (VC) of 59.3V when subjected to a 10/1000μs surge waveform at peak pulse current (IPPM) of 25.3A, measured per JEDEC standards. This value ensures downstream components see limited overvoltage stress during transient events. The 1V5KE43A maintains this clamping performance across its specified operating temperature range of −55°C to +175°C.
Is the 1V5KE43A unidirectional or bidirectional, and how is polarity identified?
The 1V5KE43A is a unidirectional TVS diode, intended for DC-biased protection circuits. Polarity is marked by a cathode band on the DO-201 package body - the banded end connects to the protected line, while the unbanded end connects to ground. Bidirectional variants carry a "C" suffix (e.g., 1V5KE43CA), which the 1V5KE43A does not have.
What is the reverse leakage current specification for the 1V5KE43A at its rated VRWM?
At its reverse stand-off voltage (VRWM) of 36.8V and TA = 25°C, the 1V5KE43A exhibits a maximum reverse leakage current (IR) of 5μA. This low leakage ensures minimal power loss and avoids interference in high-impedance sensing circuits. The 1V5KE43A maintains IR <1μA above 10V, supporting precision analog front-end protection.
Can the 1V5KE43A be used in place of the older 1N6286A part?
Yes, the 1V5KE43A is the direct successor to 1N6286A, sharing identical electrical specifications, DO-201 package dimensions, and thermal ratings. Taiwan Semiconductor updated the part numbering for improved traceability and RoHS/halogen-free compliance. No PCB or schematic changes are needed when replacing 1N6286A with 1V5KE43A in existing designs.
Does the 1V5KE43A meet automotive-grade reliability requirements?
The 1V5KE43A is qualified per AEC-Q200 for passive components and supports automotive applications such as body control modules and lighting drivers. Its −55°C to +175°C junction temperature range, JESD201 Class 2 whisker resistance, and UL 94V-0 flammability rating align with automotive environmental stress requirements. However, final qualification depends on system-level validation per ISO 7637-2 and ISO 10605.
1V5KE43A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AD, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 25.3A
- 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-201AD
1V5KE43A FAQ
1.How can I place an order for 1V5KE43A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE43A 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 1V5KE43A reliable?
The price and inventory of 1V5KE43A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE43A is usually 5 days.
3.What payment methods are accepted for 1V5KE43A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE43A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE43A?
1V5KE43A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE43A 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 1V5KE43A?
For technical support, including 1V5KE43A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE43A requirements.
6.How does Aetrix verify that 1V5KE43A is sourced from the original manufacturer or authorized distributors?
All 1V5KE43A 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 1V5KE43A meets industry standards.
7.What is the process for return or replacement of 1V5KE43A?
All 1V5KE43A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE43A, 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 1V5KE43A part is unused and in its original packaging.
Return procedure for 1V5KE43A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1V5KE43A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
