My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KA43AHE3/73
- Part No.:
- 1.5KA43AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA43AHE3/73.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,469
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KA43AHE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 59.3 V under 25.3 A surge current, and operates up to +185 °C junction temperature - ideal for protecting automotive sensor signal lines and MOSFET gate drivers against load dump and inductive switching transients.
For engineers reviewing the 1.5KA43AHE3/73 datasheet, 1.5KA43AHE3/73 pinout, 1.5KA43AHE3/73 application, or 1.5KA43AHE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 40.9–45.2 V breakdown voltage range, low 0.101 %/°C VBR temperature coefficient, and RoHS-compliant HE3 package with matte tin-plated leads solderable per J-STD-002.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repeated surge stress and high-temperature operation. Its unidirectional polarity enables precise reverse-biased protection of DC rails and signal paths without forward conduction interference.
Designed for automotive electronics, it meets stringent reliability requirements including 185 °C maximum junction temperature, 200 A 8.3 ms surge current rating, and compliance with ANSI/IEEE C62.35 surge waveform standards - ensuring robust immunity against ISO 7637-2 and ISO 16750-2 transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy surges typical of automotive load dump events |
| Breakdown Voltage VBR | 40.9–45.2 V at 1 mA - defines precise clamping onset for 36 V nominal systems |
| Clamping Voltage VC | 59.3 V at 25.3 A - limits protected circuit voltage during worst-case transient |
| Operating Temperature Range | −65 °C to +185 °C - supports under-hood and powertrain applications |
| AEC-Q101 Qualified | Yes - validated for automotive reliability per stress test requirements |
| RoHS & WEEE Compliant | Yes - HE3 suffix denotes high-reliability, lead-free, whisker-resistant finish |
| Surge Current IPPM | 25.3 A (10/1000 µs) - quantifies maximum transient current handled before clamping |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 flammability rating; matte tin-plated axial leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping |
| Cathode | Current exit terminal in forward bias; clamping node in reverse bias | Connected to higher-potential rail (e.g., battery+); absorbs surge energy into ground path |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and lifetime |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 16750-2 Pulse 5a) |
| Fast response time | Sub-nanosecond turn-on ensures protection before sensitive ICs experience overvoltage |
| Solder dip rated 260 °C / 40 s | Supports standard reflow and wave soldering without parameter shift or delamination |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature automotive environments |
Applications
| Automotive Sensor Protection | Powertrain Control Module (PCM) Input Protection |
|---|---|
Use Scenario: Protecting analog output signals from engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input pin to clamp transients below ADC input damage threshold. Use Value: Prevents sensor signal corruption and ECU reset events by limiting clamped voltage to 59.3 V while handling 25.3 A surge current. | Use Scenario: Safeguarding digital inputs on PCM microcontrollers connected to throttle position sensor (TPS) and crankshaft position sensor (CKP) circuits. IC Role / Device Role / Timing Role: Standoff voltage (36.8 V) exceeds normal 12 V/24 V system levels but triggers clamping before 5 V logic-level damage occurs. Use Value: Maintains functional safety integrity by suppressing ISO 7637-2 Pulse 1 and Pulse 3b transients without leakage-induced signal offset. |
| Body Control Module (BCM) LIN Bus Protection | Electric Power Steering (EPS) Motor Driver Protection |
Use Scenario: Shielding LIN transceiver pins from ESD and coupled noise in door module wiring harnesses. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS (typ. <100 pF) placed on LIN data line to ground, preserving signal rise/fall times. Use Value: Enables reliable 19.2 kbps LIN communication by clamping transients without distorting bus timing or increasing bit error rate. | Use Scenario: Protecting high-side and low-side MOSFET gates in EPS H-bridge drivers from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Mounted across gate-source terminals to limit VGS excursion and prevent unintended FET turn-on or oxide breakdown. Use Value: Extends MOSFET lifetime by limiting gate voltage to ≤59.3 V during 200 A motor stall events, per AEC-Q101 stress conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/5AT | 600 W peak power, SMA package, 43 V VBR (40.9–45.2 V), 100 A IPPM (at 10/1000 µs) | Lower power rating; suited for non-automotive consumer/industrial PCBs with space constraints | Select when board area is limited and surge energy does not exceed 600 W |
| 1.5KE43AHE3/A | Same 1500 W rating and VBR, but TO-204AA (DO-41) package; no AEC-Q101 qualification | Lacks automotive reliability validation; not approved for under-hood use per OEM specs | Choose only for cost-sensitive industrial designs where AEC-Q101 is not mandated |
Compared with SMAJ43A-E3/5AT and 1.5KE43AHE3/A, the 1.5KA43AHE3/73 uniquely combines AEC-Q101 qualification, 1500 W capability, and axial-leaded 1.5KA package optimized for high-current leaded mounting - making it the sole option qualified for production automotive powertrain and chassis modules requiring long-term thermal stability up to 185 °C.
Availability
1.5KA43AHE3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, powertrain control module hardening, and electric power steering system design requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KA43AHE3/73 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 is a global leader in discrete semiconductors, specializing in high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive power distribution and signal conditioning systems - emphasizing thermal robustness, surge consistency, and long-term parametric stability under thermal cycling.
FAQ
What is the breakdown voltage range of the 1.5KA43AHE3/73?
The 1.5KA43AHE3/73 has a specified breakdown voltage (VBR) range of 40.9 V to 45.2 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable clamping behavior in 36 V automotive systems and supports compatibility with ISO 16750-2 voltage thresholds. The value is guaranteed across −65 °C to +185 °C operating temperature.
Is the 1.5KA43AHE3/73 qualified for automotive use?
Yes, the 1.5KA43AHE3/73 is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88300, Note (1). It undergoes stress testing for high-temperature operating life, temperature cycling, and surge robustness required for under-hood and powertrain applications. The HE3 suffix further denotes automotive-grade reliability and RoHS compliance.
What is the clamping voltage of the 1.5KA43AHE3/73 at rated surge current?
The 1.5KA43AHE3/73 clamps to a maximum of 59.3 V at 25.3 A peak pulse current (IPPM) using a 10/1000 µs waveform. This value is measured per Figure 3 in the datasheet and represents the upper limit of voltage seen by downstream circuitry during worst-case transient events - critical for ensuring protected ICs remain within absolute maximum ratings.
Does the 1.5KA43AHE3/73 have unidirectional or bidirectional polarity?
The 1.5KA43AHE3/73 is unidirectional only, as stated in the FEATURES section of document 88300. Its polarity is marked by a cathode band, and it functions as a reverse-biased avalanche diode - conducting only when reverse voltage exceeds VBR. It is not rated for bidirectional operation or AC line protection.
What package type and lead finish does the 1.5KA43AHE3/73 use?
The 1.5KA43AHE3/73 uses Case Style 1.5KA: an axial-leaded, molded epoxy package with UL 94 V-0 rating. Its leads are matte tin-plated and qualified per J-STD-002 for solderability and JESD201 Class 2 for whisker resistance - essential for automotive manufacturing and long-term field reliability.
1.5KA43AHE3/73 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA43AHE3/73 FAQ
1.How can I place an order for 1.5KA43AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA43AHE3/73 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 1.5KA43AHE3/73 reliable?
The price and inventory of 1.5KA43AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA43AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA43AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA43AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA43AHE3/73?
1.5KA43AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA43AHE3/73 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 1.5KA43AHE3/73?
For technical support, including 1.5KA43AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA43AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA43AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA43AHE3/73 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 1.5KA43AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA43AHE3/73?
All 1.5KA43AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA43AHE3/73, 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 1.5KA43AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA43AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA43AHE3/73 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
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 …
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…
