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Vishay General Semiconductor - Diodes Division 1.5KE91C-E3/73
- Part No.:
- 1.5KE91C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91C-E3/73.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
1.5KE91C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 125 V at 12 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE91C-E3/73 datasheet, 1.5KE91C-E3/73 pinout, 1.5KE91C-E3/73 application, or 1.5KE91C-E3/73 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, thermal derating curves, and direct alternatives for circuit protection design-in.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping in AC-coupled or floating lines without polarity constraints.
Rated for 1500 W peak pulse power with 10/1000 µs waveform and 0.01% duty cycle, it sustains repetitive surges while maintaining stable VC ≤ 125 V at IPPM = 12 A. Thermal resistance is RθJL = 15.4 °C/W (junction-to-lead), supporting reliable operation up to TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A - clamped voltage during full-rated 1500 W transient, critical for downstream component survivability |
| PPPM | 1500 W - peak surge power handling capability per 10/1000 µs waveform, enabling protection against IEC 61000-4-5 Level 4 surges |
| IPPM | 12 A - peak pulse current corresponding to VC, used to size series impedance and verify margin vs. system fault current |
| TJ range | –55 °C to +175 °C - wide operating junction temperature supports automotive under-hood and industrial motor drive environments |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 rated epoxy body |
Pinout & Package
1.5KE91C-E3/73 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. No polarity marking is present, as the device is bidirectional and symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either terminal serves as anode or cathode depending on instantaneous polarity - no orientation required during PCB placement |
| Leads (matte tin plated) | Thermal and electrical interface | Supports J-STD-002 solderability and 275 °C/10 s solder dip; primary heat path to PCB copper for thermal management |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment without external heatsinking |
| Sub-nanosecond response time | Clamps transients before sensitive ICs experience overstress - critical for protecting high-speed logic and analog front-ends |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation suitable for safety-critical consumer and automotive applications |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, ensuring solder joint integrity in vibration-prone environments |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle power rails from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across supply rail to clamp positive and negative spikes before they reach MCU power pins or CAN transceivers. Use Value: Withstands 12 A peak surge at 125 V clamping, preventing latch-up or gate oxide damage in automotive-grade microcontrollers and power management ICs. |
Use Scenario: Shielding 4–20 mA or RS-485 sensor nodes from ESD and field-induced surges in factory automation. IC Role / Device Role / Timing Role: Placed differential-mode across twisted-pair lines to suppress common-mode transients without distorting signal integrity. Use Value: Symmetrical clamping ensures equal protection on both line polarities, preserving data validity during ±15 kV ESD events per IEC 61000-4-2. |
| Telecom AC/DC Adapter Input Stage | Consumer Appliance Motor Drive Snubber |
Use Scenario: Safeguarding offline SMPS inputs against lightning surges entering via AC mains in DSL modems or VoIP gateways. IC Role / Device Role / Timing Role: Primary-side TVS connected line-to-neutral to limit let-through energy into bridge rectifier and bulk capacitor. Use Value: 1500 W rating absorbs 10/1000 µs surges up to 6 kV (line-earth), reducing need for multi-stage protection and lowering BOM cost. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage spikes generated during PWM commutation. Use Value: Fast <1 ns response prevents MOSFET avalanche failure during rapid turn-off, extending power stage lifetime in high-cycle applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | DO-214AA package, 90 V VBR, 600 W PPPM, lower IPPM (33.3 A at 135 V) | Surface-mount only; unsuitable for through-hole designs or high-thermal-mass chassis mounting | Select when board space is constrained and surge energy is ≤600 W; requires re-layout and thermal pad redesign. |
| 1.5KE91CA | Same 1.5KE package and VBR, but non-RoHS commercial grade (no E3 suffix); identical electrical specs | Lacks JESD 201 Class 1A whisker resistance and RoHS compliance documentation | Acceptable for non-automotive, non-exported prototypes; not approved for production in regulated markets requiring RoHS traceability. |
Compared with 1.5KE91C-E3/73, SMBJ90CA offers smaller footprint but sacrifices 60% surge power handling and thermal robustness, while 1.5KE91CA matches performance but lacks RoHS compliance and whisker mitigation - making 1.5KE91C-E3/73 the preferred choice for volume production in automotive and industrial end-equipment.
Availability
1.5KE91C-E3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom AC input surge suppression, and consumer appliance motor drive snubbing requiring stable component supply and full RoHS compliance.
Supply support for 1.5KE91C-E3/73 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, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, balancing surge robustness, thermal stability, and regulatory compliance across automotive, telecom, and industrial power systems.
FAQ
What is the breakdown voltage tolerance for 1.5KE91C-E3/73?
The 1.5KE91C-E3/73 has a specified breakdown voltage range of 86.5 V to 95.5 V at 1 mA test current, representing a ±5% tolerance around the nominal 91 V rating. This tight VBR window ensures consistent clamping onset across production lots and supports predictable system-level surge margin calculations in designs using 1.5KE91C-E3/73.
Is 1.5KE91C-E3/73 suitable for automotive applications?
Yes, 1.5KE91C-E3/73 meets key automotive requirements: it operates from –55 °C to +175 °C, features RoHS-compliant matte tin plating qualified to JESD 201 Class 1A for whisker resistance, and its glass-passivated junction ensures reliability under thermal cycling and humidity. While not AEC-Q101 certified itself, it belongs to the 1.5KE family where AEC-Q101 variants exist (e.g., 1.5KE91CAHE3_B), confirming its suitability for automotive use with proper qualification path.
How does the clamping voltage of 1.5KE91C-E3/73 compare to its breakdown voltage?
At its rated peak pulse current of 12 A, the 1.5KE91C-E3/73 clamps to 125 V - a 30–45 V margin above its VBR range (86.5–95.5 V). This ΔV = VC – VBR reflects the device's incremental surge resistance and determines the maximum overvoltage stress imposed on protected circuitry. Designers use this 125 V value to verify downstream components remain within absolute maximum ratings during surge events.
Can 1.5KE91C-E3/73 be used in bidirectional AC signal lines?
Yes, 1.5KE91C-E3/73 is explicitly designed for bidirectional applications. Its symmetrical structure provides identical VBR, VC, and leakage characteristics in both polarities, making it ideal for protecting AC-coupled interfaces such as telephone lines, audio transformers, or isolated RS-485 buses. No polarity marking is present, simplifying layout and eliminating orientation errors during assembly of 1.5KE91C-E3/73.
What is the thermal resistance of 1.5KE91C-E3/73, and how does it affect PCB layout?
The 1.5KE91C-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W. Since it lacks a dedicated thermal pad, effective heat dissipation relies on copper area connected to its axial leads. For sustained surge duty, designers should use ≥500 mil² copper pour per lead and minimize trace length to reduce thermal impedance - critical for maintaining TJ ≤ 175 °C during repetitive 1500 W pulses.
1.5KE91C-E3/73 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE91C-E3/73 FAQ
1.How can I place an order for 1.5KE91C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91C-E3/73 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 1.5KE91C-E3/73 reliable?
The price and inventory of 1.5KE91C-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91C-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE91C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91C-E3/73?
1.5KE91C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91C-E3/73 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 1.5KE91C-E3/73?
For technical support, including 1.5KE91C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91C-E3/73 requirements.
6.How does Aetrix verify that 1.5KE91C-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91C-E3/73 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 1.5KE91C-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE91C-E3/73?
All 1.5KE91C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91C-E3/73, 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 1.5KE91C-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE91C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91C-E3/73 Tags
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