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Vishay General Semiconductor - Diodes Division 1.5KE43CHE3/73
- Part No.:
- 1.5KE43CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE43CHE3/73.pdf
- Description:
- TVS DIODE 34.8VWM 61.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
1.5KE43CHE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1.0 mA), 36.8 V maximum working voltage (VWM), 59.3 V clamping voltage (VC) at 25.3 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and operates across –55 °C to +175 °C junction temperature range - deployed in automotive power supply inputs and industrial sensor interface protection.
For engineers reviewing the 1.5KE43CHE3/73 datasheet, 1.5KE43CHE3/73 pinout, 1.5KE43CHE3/73 application, or 1.5KE43CHE3/73 equivalent, this part delivers verified transient suppression for 24 V and 36 V systems with AEC-Q101 qualification, RoHS-compliant HE3 packaging, and validated clamping performance under lightning-surge and inductive-switching transients per IEC 61000-4-5.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR and sustains 1500 W peak pulse power with a 10/1000 µs waveform at 0.01% duty cycle, enabling robust protection of downstream MOSFETs and ICs against repetitive surges.
Thermal design is supported by RθJL = 15.4 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient), with solderability validated per J-STD-002 and JESD 22-B102. The E3/73 suffix denotes RoHS-compliant matte tin plating and JESD 201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise voltage threshold where avalanche conduction initiates reliably |
| VWM | 36.8 V - maximum continuous reverse operating voltage without leakage exceeding 1.0 µA |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage during full 1500 W transient, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, critical for IEC 61000-4-5 compliance |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports high-energy fault clearing |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments without derating |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 molded epoxy body |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, epoxy-molded body with cathode band marking. Lead finish: matte tin, solderable per J-STD-002. Dimensions: 5.3 mm × 5.3 mm × 9.5 mm (L × W × H), lead diameter 1.07 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to system ground or low-side reference; carries full surge current during clamping |
| Cathode | Avalanche conduction node / protected line connection | Connected to line being protected (e.g., 24 V rail); voltage referenced to anode during transient |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Validated for EN 61000-4-5 Level 4 (4 kV) surge immunity in 24 V power distribution networks |
| AEC-Q101 qualified (HE3 suffix) | Qualified for automotive applications including engine control units and body electronics per stress test requirements |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, protecting 48 V tolerant ICs without additional buffering |
| JESD 201 Class 1A whisker resistance | Eliminates risk of tin whisker growth in high-reliability industrial and transportation systems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load-dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary shunt clamping device placed directly at connector entry point before DC-DC converter input. Use Value: Limits transient voltage to ≤59.3 V, preventing damage to upstream LDOs and microcontrollers rated for 60 V absolute maximum. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to ESD and inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) suppressing both positive and negative transients on analog input lines. Use Value: Clamps sub-100 ns ESD events to <60 V while maintaining <1 µA leakage at 36.8 V, preserving loop accuracy and calibration stability. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V telecom rectifier outputs feeding base station RF modules vulnerable to lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Secondary overvoltage clamp after primary MOV stage, providing precise, low-jitter clamping for sensitive RF ICs. Use Value: Delivers 1500 W pulse handling with <1 ns response, ensuring RF front-end ICs see no voltage beyond 59.3 V even during 10/1000 µs surges. |
Use Scenario: Brushed DC motor controllers in home appliances experiencing commutation spikes exceeding 100 V. IC Role / Device Role / Timing Role: Unidirectional TVS mounted across motor terminals to absorb inductive energy during PWM turn-off. Use Value: Absorbs 200 A single-pulse surge (8.3 ms) without degradation, extending MOSFET lifetime and eliminating need for snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A | DO-214AA package (SMB), 600 W PPPM, same VBR (40.9–45.2 V), higher VC (69.4 V) | Lower power handling; suited for space-constrained PCBs but insufficient for IEC 61000-4-5 Level 4 | Select when board area is limited and surge energy is ≤600 W; not drop-in due to different footprint and thermal mass |
| 1.5KE43A-E3/54 | Same electrical specs and DO-201AD package, but commercial-grade (non-AEC-Q101), E3 suffix only (no HE3) | Lacks automotive qualification and JESD 201 Class 2 whisker resistance; lower reliability assurance | Acceptable for industrial or consumer use where AEC-Q101 is not mandated; identical pinout and layout |
Compared with 1.5KE43CHE3/73, SMBJ43A offers smaller size but sacrifices 60% pulse power and automotive qualification, while 1.5KE43A-E3/54 matches form/fit/function for non-automotive designs but omits AEC-Q101 validation and enhanced whisker resistance.
Availability
1.5KE43CHE3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed surge suppression requiring stable component supply across extended temperature and high-reliability environments.
Supply support for 1.5KE43CHE3/73 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising long-term stability or thermal robustness.
FAQ
What is the breakdown voltage tolerance for 1.5KE43CHE3/73?
The 1.5KE43CHE3/73 has a specified breakdown voltage range of 40.9 V to 45.2 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 43 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports reliable design margining in 24 V and 36 V systems where overvoltage thresholds must be precisely controlled.
Is 1.5KE43CHE3/73 suitable for bidirectional transient suppression?
No - 1.5KE43CHE3/73 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay offers the 1.5KE43CA variant. Using 1.5KE43CHE3/73 in bidirectional configurations risks forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
What does the "HE3/73" suffix mean on 1.5KE43CHE3/73?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 1A whisker resistance; "73" specifies the packaging configuration - 13" paper tape and reel, 1400 units per reel. This distinguishes it from commercial-grade E3 variants and confirms suitability for automotive production environments requiring traceability and reliability validation.
Can 1.5KE43CHE3/73 replace 1.5KE43A-E3/54 in an existing design?
Yes - 1.5KE43CHE3/73 is pin-compatible and electrically identical to 1.5KE43A-E3/54, with identical VBR, VC, and package. The key upgrade is AEC-Q101 qualification and enhanced whisker resistance, making it suitable for automotive applications where the E3/54 version is limited to commercial use. No PCB changes are required.
What is the maximum clamping voltage of 1.5KE43CHE3/73 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE43CHE3/73 is 59.3 V at 25.3 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is guaranteed per datasheet testing and represents the upper limit of voltage seen by protected circuitry during worst-case transient events, enabling accurate overvoltage margin analysis for downstream components.
1.5KE43CHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE43CHE3/73 FAQ
1.How can I place an order for 1.5KE43CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE43CHE3/73 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 1.5KE43CHE3/73 reliable?
The price and inventory of 1.5KE43CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE43CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE43CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE43CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE43CHE3/73?
1.5KE43CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE43CHE3/73 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 1.5KE43CHE3/73?
For technical support, including 1.5KE43CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE43CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE43CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE43CHE3/73 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 1.5KE43CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE43CHE3/73?
All 1.5KE43CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE43CHE3/73, 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 1.5KE43CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE43CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE43CHE3/73 Tags
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