My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA43HE3/73
- Part No.:
- 1.5KA43HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA43HE3/73.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,186
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA43HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode in the 1.5KA case style, rated for 1500 W peak pulse power (10/1000 µs), 24.2 A peak pulse current, and 61.9 V maximum clamping voltage at IPPM. It features AEC-Q101 qualification, 185 °C max junction temperature, and RoHS-compliant HE3 packaging for high-reliability protection of MOSFETs and sensor signal lines in automotive power systems.
For engineers reviewing the 1.5KA43HE3/73 datasheet, 1.5KA43HE3/73 pinout, 1.5KA43HE3/73 application, or 1.5KA43HE3/73 equivalent, key selection criteria include clamping voltage under 62 V at 24.2 A, breakdown voltage range of 38.7–47.3 V, AEC-Q101 qualification, 185 °C operating temperature, and compatibility with J-STD-002 soldering standards.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity. Its low incremental surge resistance and fast response time enable effective suppression of inductive switching transients on 12 V and 24 V automotive rails.
The device is characterized by a 0.101 %/°C temperature coefficient of VBR and exhibits 1.0 µA max reverse leakage at 34.8 V (VWM) and 150 °C - critical for low-power sensor interface protection where leakage-induced offset must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in automotive load-dump events |
| Breakdown Voltage (VBR) | 38.7–47.3 V - ensures reliable triggering above normal 24 V rail but below system overvoltage thresholds |
| Clamping Voltage (VC) | 61.9 V at 24.2 A - limits downstream voltage stress to safe levels for 36 V-rated ICs and MOSFETs |
| Operating Temperature Range | −65 °C to +185 °C - supports under-hood placement in modern engine control units |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
| RoHS & Whisker Compliance | HE3 suffix meets RoHS 2002/95/EC and JESD201 Class 2 whisker resistance |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, lead length 9.5 mm (0.375"), diameter 4.8–5.3 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit point during reverse-biased clamping | Marked by color band; connects to protected line (e.g., CAN_H, LIN, sensor supply) |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across 1000+ surge cycles without parameter drift |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 24 V commercial vehicle systems |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
| Solder dip tolerance | Withstands 260 °C for 40 s - compatible with standard lead-free reflow and wave soldering processes |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting microcontroller I/O and power supply inputs from alternator load-dump transients and relay coil flyback in diesel engine ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector entry point before LDO regulators and MCU pins. Use Value: Clamps 120 V/100 ms load-dump spikes to ≤62 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic and 40 V-rated power FETs. | Use Scenario: Safeguarding analog front-end circuits of pressure and temperature sensors in factory automation PLC modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Standoff voltage (34.8 V) isolates sensor output from 24 V supply rail while clamping induced surges on twisted-pair signal lines. Use Value: 1.0 µA leakage at 150 °C avoids DC offset errors in precision 24-bit sigma-delta ADC measurements. |
| Commercial Vehicle Telematics Module | Automotive Body Control Module (BCM) |
Use Scenario: Shielding GPS/GSM antenna feedlines and CAN FD transceivers from electrostatic discharge and ignition system coupling in fleet telematics units. IC Role / Device Role / Timing Role: TVS placed inline with RF coax shield and CAN bus differential pairs to suppress common-mode surges up to 1500 W. Use Value: 61.9 V clamping ensures CAN FD PHYs (rated to 70 V abs max) remain within safe operating area during ISO 10605 ESD events. | Use Scenario: Protecting LIN bus transceivers and window motor driver ICs from battery reverse connection and jump-start transients in door module assemblies. IC Role / Device Role / Timing Role: Unidirectional clamp between LIN line and ground, sized to handle 200 A IFSM surge without failure. Use Value: 200 A peak forward surge rating enables survival of accidental 12 V-to-ground short-circuit events during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3/52 | 600 W rating, DO-214AA package, 64.5 V clamping at 9.7 A | Lower power handling; suitable only for sub-1 kV/microsecond transients in non-load-dump scenarios | Select when space-constrained PCB layout requires SMC footprint and surge energy is limited to <600 W |
| 1.5KE43A | Same 43 V breakdown but TO-218 package, 64.5 V clamping, no AEC-Q101 qualification | Lacks automotive reliability validation; not approved for under-hood use per OEM specs | Acceptable for industrial control panels where AEC-Q101 is not mandated and thermal mass permits larger heatsink mounting |
Compared with SMBJ43AHE3/52 and 1.5KE43A, the 1.5KA43HE3/73 delivers 2.5× higher surge power capability and certified automotive qualification - making it the sole choice for load-dump protection in AEC-Q100-compliant electronic control units requiring 1500 W immunity.
Availability
1.5KA43HE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and commercial vehicle telematics modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KA43HE3/73 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
Vishay General Semiconductor designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5KA series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - targeting engine control, body electronics, and powertrain systems where sustained 185 °C operation and repeatable 1500 W surge immunity are mandatory.
FAQ
What is the clamping voltage of the 1.5KA43HE3/73 at its rated peak pulse current?
The 1.5KA43HE3/73 has a maximum clamping voltage (VC) of 61.9 V at 24.2 A peak pulse current (IPPM), measured using the standardized 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet revision 20-Oct-08 (Document Number: 88300) and defines the upper voltage limit imposed on protected circuitry during surge events. Designers use this parameter to verify that downstream components such as 36 V-rated MOSFETs or 70 V-tolerant CAN transceivers remain within absolute maximum ratings.
Is the 1.5KA43HE3/73 qualified for automotive applications?
Yes, the 1.5KA43HE3/73 is explicitly AEC-Q101 qualified and designated as high-reliability/automotive grade (Base P/NHE3). It undergoes rigorous stress testing including high-temperature reverse bias, temperature cycling, and accelerated life testing per AEC-Q101 Rev D. The HE3 suffix further confirms compliance with JESD201 Class 2 whisker resistance and RoHS 2002/95/EC - making the 1.5KA43HE3/73 suitable for under-hood and safety-critical automotive subsystems.
What does the "HE3" suffix mean in 1.5KA43HE3/73?
The "HE3" suffix in 1.5KA43HE3/73 indicates RoHS-compliant, high-reliability automotive grade construction meeting AEC-Q101 requirements. It specifies matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards, plus JESD201 Class 2 whisker resistance. The "/73" denotes tape-and-reel packaging with 750 units per reel - distinct from "/54" (1400 units) - ensuring correct logistics and SMT placement compatibility for the 1.5KA43HE3/73.
How does the 1.5KA43HE3/73 differ from the 1.5KA43A variant?
The 1.5KA43HE3/73 is the base unidirectional part with breakdown voltage 38.7–47.3 V, while the 1.5KA43A variant has tighter VBR tolerance (40.9–45.2 V) and slightly lower clamping voltage (59.3 V at 25.3 A). Both share identical package, AEC-Q101 qualification, and thermal ratings. The 1.5KA43HE3/73 offers broader VBR spread for cost-sensitive designs where precise threshold control is less critical than surge margin.
What is the maximum reverse leakage current for the 1.5KA43HE3/73 at elevated temperature?
At 150 °C junction temperature and stand-off voltage (VWM = 34.8 V), the 1.5KA43HE3/73 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This value is specified in the Vishay datasheet (Document Number: 88300) and is critical for low-power sensor interfaces where excessive leakage could induce measurement offset or false wake-up in sleep-mode systems. At 25 °C, leakage is ≤1.0 µA - confirming stable performance across the full operating range.
1.5KA43HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 34.8V
- Voltage - Breakdown (Min):
- 38.7V
- Voltage - Clamping (Max) @ Ipp:
- 61.9V
- Current - Peak Pulse (10/1000µs):
- 24.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA43HE3/73 FAQ
1.How can I place an order for 1.5KA43HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA43HE3/73 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 1.5KA43HE3/73 reliable?
The price and inventory of 1.5KA43HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA43HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA43HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA43HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA43HE3/73?
1.5KA43HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA43HE3/73 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 1.5KA43HE3/73?
For technical support, including 1.5KA43HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA43HE3/73 requirements.
6.How does Aetrix verify that 1.5KA43HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA43HE3/73 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 1.5KA43HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA43HE3/73?
All 1.5KA43HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA43HE3/73, 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 1.5KA43HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA43HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA43HE3/73 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
