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Vishay General Semiconductor - Diodes Division 1.5KE91-E3/73
- Part No.:
- 1.5KE91-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91-E3/73.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,908
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Product details
Overview
1.5KE91-E3/73 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 86.5 V to 95.5 V breakdown voltage (VBR) at 1 mA, 77.8 V maximum stand-off voltage (VWM), 125 V clamping voltage (VC) at 12 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 input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE91-E3/73 datasheet, 1.5KE91-E3/73 pinout, 1.5KE91-E3/73 application, or 1.5KE91-E3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal resistance data, and direct alternative options for circuit-level ESD and lightning transient protection design.
Technical Context
This unidirectional TVS diode uses a glass passivated silicon junction to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping action begins at VBR = 86.5–95.5 V and limits transient voltage to ≤125 V at 12 A (10/1000 µs), with 0.106 %/°C temperature coefficient of VBR.
Rated for 1500 W peak pulse power and 200 A non-repetitive forward surge current (8.3 ms half-sine), it sustains 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C. Thermal resistance is 15.4 °C/W junction-to-lead and 75 °C/W junction-to-ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1 mA - defines reliable conduction onset threshold for overvoltage triggering |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 125 V at 12 A (10/1000 µs) - clamped voltage seen by protected IC during worst-case surge |
| PPPM | 1500 W - peak transient energy absorption capability without failure |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for inductive switch-off events |
| TJ range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial ambient environments |
| RθJL | 15.4 °C/W - critical for estimating junction temperature rise during repeated surges |
Pinout & Package
1.5KE91-E3/73 is housed in the standard axial-leaded JEDEC Case Style 1.5KE package (DO-201AD), with cathode indicated by a color band on the body. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal | Connected to protected line (e.g., 24 V rail); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems |
| Clamping ratio VC/VBR ≈ 1.31 | Minimizes voltage overshoot during fast transients, reducing stress on downstream MOSFETs or regulators |
| Sub-nanosecond response time | Activates before sensitive ICs experience damaging overvoltage - faster than MOVs or GDTs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, suitable for high-reliability commercial applications |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt protector placed upstream of DC-DC converter input. Use Value: Clamps transients to ≤125 V while absorbing up to 1500 W, preventing regulator latch-up or MOSFET avalanche failure. |
Use Scenario: 4–20 mA current loop interfaces in PLC analog input modules subjected to field wiring ESD and inductive kick. IC Role / Device Role / Timing Role: Unidirectional TVS placed across loop terminals to divert surge energy to ground. Use Value: Sub-ns response ensures clamping occurs before op-amp input stage damage; VWM = 77.8 V avoids interference with normal loop operation. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drive Inputs |
Use Scenario: -48 V telecom rectifier outputs feeding base station backplane, vulnerable to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-rated TVS on power bus to suppress common-mode transients before distribution. Use Value: 77.8 V VWM allows safe operation at nominal -48 V with margin; 125 V VC protects downstream PMICs rated for 130 V abs max. |
Use Scenario: AC motor drive boards in washing machines, where TRIAC switching induces repetitive dv/dt spikes on control logic rails. IC Role / Device Role / Timing Role: Localized TVS on 5 V/3.3 V microcontroller supply lines near gate drivers. Use Value: 1500 W rating handles repetitive 10/1000 µs spikes; RoHS/E3 compliance meets global appliance safety certifications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | DO-214AA package; lower PPPM = 600 W; VBR = 100–111 V; VC = 146 V @ 4.1 A | Smaller footprint but lower surge capacity; suited for space-constrained PCBs with moderate threat levels | Select SMBJ90A only when board area is critical and surge energy remains below 600 W; not drop-in for 1.5KE91-E3/73 due to different package and derating. |
| 1.5KE91AHE3_A | Same 1.5KE package and electrical specs; AEC-Q101 qualified; HE3 suffix denotes whisker-tested grade | Validated for automotive under-hood use per AEC-Q101; higher reliability screening vs. commercial E3 grade | Choose 1.5KE91AHE3_A for automotive OEM designs requiring qualification evidence; otherwise 1.5KE91-E3/73 suffices for industrial/commercial use. |
Compared with SMBJ90A, 1.5KE91-E3/73 offers 2.5× higher surge power and axial-leaded through-hole mounting for mechanical robustness; versus 1.5KE91AHE3_A, it lacks AEC-Q101 certification but matches all electrical performance and shares identical footprint and thermal behavior.
Availability
1.5KE91-E3/73 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line protection, and telecom DC power feed applications requiring stable component supply, consistent lead-time visibility, and full traceability.
Supply support for 1.5KE91-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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and ruggedized performance.
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 breakdown voltage range of the 1.5KE91-E3/73?
The 1.5KE91-E3/73 has a guaranteed breakdown voltage (VBR) range of 86.5 V to 95.5 V at test current IT = 1 mA, per Vishay Document Number 88301. This tolerance ensures predictable turn-on behavior during overvoltage events while maintaining sufficient margin above its 77.8 V maximum working voltage (VWM). The 1.5KE91-E3/73 achieves this specification using a glass-passivated silicon junction structure.
Is the 1.5KE91-E3/73 suitable for bidirectional transient protection?
No, the 1.5KE91-E3/73 is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current like a standard rectifier. Bidirectional variants use the "CA" suffix (e.g., 1.5KE91CA). The 1.5KE91-E3/73 must be oriented with its cathode toward the protected line and anode to ground to function correctly in clamp mode.
What is the clamping voltage of the 1.5KE91-E3/73 at its rated peak pulse current?
The 1.5KE91-E3/73 clamps to a maximum of 125 V at 12 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and reflects the actual voltage imposed on the protected circuit during worst-case surge events. The 1.5KE91-E3/73 maintains this clamping performance across its full operating temperature range.
Does the 1.5KE91-E3/73 meet automotive qualification standards?
The 1.5KE91-E3/73 is RoHS-compliant and rated for commercial temperature range (-55 °C to +175 °C), but it is not AEC-Q101 qualified. For automotive applications requiring formal qualification, the pin-compatible 1.5KE91AHE3_A variant is available - same electrical specs and package, with added AEC-Q101 testing and HE3 whisker-resistant plating. The 1.5KE91-E3/73 remains suitable for non-qualified automotive subsystems where functional performance is verified.
How does the thermal resistance of the 1.5KE91-E3/73 affect its surge handling capability?
The 1.5KE91-E3/73 has a junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, enabling efficient heat transfer from the die to the PCB copper via leads during repetitive surges. This low RθJL supports reliable operation at elevated ambient temperatures and allows multiple 1500 W pulses without exceeding 175 °C junction limit - provided lead length and copper area meet JEDEC DO-201AD recommendations (e.g., 0.375" lead length).
1.5KE91-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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE91-E3/73 FAQ
1.How can I place an order for 1.5KE91-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91-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 1.5KE91-E3/73 reliable?
The price and inventory of 1.5KE91-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 1.5KE91-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE91-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91-E3/73?
1.5KE91-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91-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 1.5KE91-E3/73?
For technical support, including 1.5KE91-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91-E3/73 requirements.
6.How does Aetrix verify that 1.5KE91-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91-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 1.5KE91-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE91-E3/73?
All 1.5KE91-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91-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 1.5KE91-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE91-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91-E3/73 Tags
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