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Vishay General Semiconductor - Diodes Division 1.5KE91CHE3/73
- Part No.:
- 1.5KE91CHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91CHE3/73.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,071
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Product details
Overview
1.5KE91CHE3/73 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 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12.0 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial power supplies.
For engineers reviewing the 1.5KE91CHE3/73 datasheet, 1.5KE91CHE3/73 pinout, 1.5KE91CHE3/73 application, or 1.5KE91CHE3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade designs.
Technical Context
This device employs a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced clamping on positive-going surges, with a maximum reverse leakage current of 1.0 µA at 77.8 V stand-off voltage (VWM).
The 1.5KE91CHE3/73 is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), exhibits a typical thermal resistance of 15.4 °C/W (junction-to-lead), and maintains stable clamping performance up to 175 °C junction temperature - critical for under-hood automotive and high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise voltage threshold at which clamping initiates |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 125 V at 12.0 A peak pulse current - actual clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 1500 W - peak transient power handling capability, enabling robust protection against lightning-induced surges |
| IFSM | 200 A - withstands 8.3 ms half-sine surge without failure, supporting high-energy inductive load switching |
| TJ max. | +175 °C - supports operation in engine control units, motor drives, and other high-ambient-temperature applications |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance enables effective heat transfer to PCB copper or heatsink |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or lower-potential rail; conducts during reverse-biased transient events |
| Cathode | Clamping reference node | Connected to protected line (e.g., 48 V supply rail); defines clamping voltage relative to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV open-circuit, 2 Ω source impedance) without degradation |
| Clamping ratio (VC/VBR) ≈ 1.31 | Low overvoltage margin ensures downstream components remain within safe absolute maximum ratings |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, H3TRB, and TCT |
| RoHS-compliant, JESD 201 Class 2 whisker resistance | Enables use in lead-free reflow assembly and eliminates tin whisker risk in long-life embedded systems |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O pins against back-EMF spikes from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Unidirectional TVS placed between motor driver output and ground to clamp positive transients before they reach sensitive logic. Use Value: Limits voltage excursion to ≤125 V during 12 A surge, preventing latch-up or oxide breakdown in 3.3 V/5 V interface ICs. |
Use Scenario: Input protection for LIN bus transceivers and window lift control circuits exposed to battery dump energy. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail upstream of LDO regulators and CAN/LIN PHYs. Use Value: Withstands ISO 7637-2 Pulse 5a (75 V/300 ms) and clamps ISO 16750-2 load-dump transients to safe levels for downstream PMICs. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Surge suppression on -48 V DC telecom power distribution boards subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on input stage of DC/DC converters feeding base station RF modules. Use Value: Maintains 77.8 V working voltage while clamping 10/1000 µs surges to 125 V - preserving converter UVP thresholds and enabling fail-safe shutdown. |
Use Scenario: DC-link protection in solar string inverters where PV array transients couple into MPPT controller power rails. IC Role / Device Role / Timing Role: Secondary clamping device parallel to bulk electrolytics, absorbing fast-rising edge energy missed by slower MOVs. Use Value: Sub-nanosecond response captures high-dI/dt events before MOV activation, reducing stress on IGBT gate drivers and current sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Lower PPPM (600 W), smaller SMB package (3.5 mm × 4.6 mm), VC = 129 V @ 4.7 A | Better suited for space-constrained PCBs with moderate surge exposure (IEC 61000-4-5 Level 2) | Select when board area is limited and full 1500 W rating is not required; verify thermal relief on 2-layer boards. |
| 1.5KE91AHE3_A | Same electrical specs and DO-201AD package; differs only in revision code (A vs. B) and RoHS compliance level (E3 vs. HE3) | Not AEC-Q101 qualified; intended for commercial-grade industrial equipment only | Use for cost-sensitive non-automotive applications where qualification testing is not mandated. |
Compared with 1.5KE91CHE3/73, SMBJ90A offers footprint reduction at the expense of surge capacity, while 1.5KE91AHE3_A provides identical protection without automotive qualification - enabling tiered sourcing for different product lines.
Availability
1.5KE91CHE3/73 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE91CHE3/73 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, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal stability are mandatory.
FAQ
What is the clamping voltage of the 1.5KE91CHE3/73 under a 10/1000 µs surge?
The 1.5KE91CHE3/73 clamps to a maximum of 125 V at its rated peak pulse current of 12.0 A (10/1000 µs waveform). This value is guaranteed per Vishay's datasheet Document Number 88301 and reflects worst-case performance across temperature and process variation - critical for validating downstream component voltage margins.
Is the 1.5KE91CHE3/73 AEC-Q101 qualified?
Yes, the 1.5KE91CHE3/73 is AEC-Q101 qualified. The "HE3" suffix denotes RoHS compliance and AEC-Q101 qualification per notes on page 2 of Vishay's 88301 datasheet, covering stress tests including high-temperature gate bias (HTGB), unbiased highly accelerated temperature/humidity bias (UHAST), and temperature cycling (TCT).
What does the "73" in 1.5KE91CHE3/73 indicate?
The "73" is a tape-and-reel packaging code per Vishay's ordering information table, specifying 750 pieces per 7-inch reel. It does not affect electrical performance but identifies the standard delivery format used by Aetrix Electronics for automated SMT placement and inventory tracking.
Can the 1.5KE91CHE3/73 be used in bidirectional configurations?
No, the 1.5KE91CHE3/73 is unidirectional only. Bidirectional variants use the "CA" suffix (e.g., 1.5KE91CA). The "C" in the part number indicates polarity type - "C" = bidirectional, no "C" = unidirectional - and mixing them risks incorrect clamping behavior or catastrophic failure.
What is the maximum operating temperature for the 1.5KE91CHE3/73?
The 1.5KE91CHE3/73 has a maximum junction temperature (TJ) of +175 °C and an operating storage range of –55 °C to +175 °C. This allows deployment in under-hood automotive ECUs, industrial variable-frequency drives, and outdoor telecom enclosures without derating below full power capability.
1.5KE91CHE3/73 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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
1.5KE91CHE3/73 FAQ
1.How can I place an order for 1.5KE91CHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91CHE3/73 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 1.5KE91CHE3/73 reliable?
The price and inventory of 1.5KE91CHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91CHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE91CHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91CHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91CHE3/73?
1.5KE91CHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91CHE3/73 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 1.5KE91CHE3/73?
For technical support, including 1.5KE91CHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91CHE3/73 requirements.
6.How does Aetrix verify that 1.5KE91CHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91CHE3/73 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 1.5KE91CHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE91CHE3/73?
All 1.5KE91CHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91CHE3/73, 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 1.5KE91CHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE91CHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91CHE3/73 Tags
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