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Vishay General Semiconductor - Diodes Division 1.5KE91-E3/54
- Part No.:
- 1.5KE91-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91-E3/54.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
1.5KE91-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 86.5 V to 95.5 V breakdown voltage (VBR), 77.8 V maximum standoff voltage (VWM), 125 V clamping voltage at 12 A peak pulse current, and 1500 W peak pulse power capability with 10/1000 µs waveform - deployed in automotive power supplies, industrial sensor interfaces, and telecom line cards.
For engineers reviewing the 1.5KE91-E3/54 datasheet, 1.5KE91-E3/54 pinout, 1.5KE91-E3/54 application, or 1.5KE91-E3/54 equivalent, this part delivers verified transient suppression for 24 V and 48 V systems where fast response (<1 ns), low clamping ratio (1.30), and AEC-Q101-compliant reliability are required.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and stable clamping under repetitive surge conditions. Its 1500 W peak pulse rating is defined per 10/1000 µs waveform with 0.01% duty cycle, and thermal performance is characterized by RθJA = 75 °C/W and RθJL = 15.4 °C/W.
The device operates across -55 °C to +175 °C junction temperature range and supports 200 A non-repetitive forward surge current (IFSM). Its 77.8 V standoff voltage ensures compatibility with 72–80 V nominal DC bus systems while maintaining <1 µA leakage at rated VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 86.5 V min / 95.5 V max at 1.0 mA test current - defines precise conduction onset for overvoltage events |
| Standoff Voltage VWM | 77.8 V - maximum continuous reverse operating voltage without significant leakage |
| Clamping Voltage VC | 125 V at 12.0 A IPPM - limits transient voltage seen by downstream ICs during 10/1000 µs surge |
| Peak Pulse Power PPPM | 1500 W - sustains single high-energy transients common in automotive load dump or inductive switching |
| Leakage Current ID | <1.0 µA at 77.8 V - prevents excessive standby power loss in always-on circuits |
| Operating Temperature | -55 °C to +175 °C - enables deployment in under-hood automotive or industrial motor control environments |
| Package | DO-201AD (Case Style 1.5KE) - industry-standard axial leaded package with 0.375" lead length for through-hole mounting |
Pinout & Package
1.5KE91-E3/54 is housed in a DO-201AD molded epoxy package (Case Style 1.5KE), featuring axial leads with matte tin plating compliant with J-STD-002 and JESD 22-B102. The cathode is marked by a color band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to lower-potential side of protected circuit (e.g., ground or return path) |
| Cathode | Current exit point in forward bias; clamping node in reverse bias | Connected to higher-potential rail (e.g., 24 V supply); absorbs surge energy when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands automotive load dump surges (ISO 7637-2 Pulse 5a) without degradation |
| Clamping ratio (VC/VBR) ≈ 1.30 | Minimizes voltage overshoot during clamping - critical for protecting 100 V-rated MOSFETs and gate drivers |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance - suitable for high-reliability industrial assembly |
| 10/1000 µs waveform response | Sub-nanosecond turn-on ensures protection before sensitive ICs experience overstress |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V CAN bus power inputs against ISO 7637-2 load dump transients up to 120 V. IC Role / Device Role / Timing Role: Primary clamping element placed between battery rail and DC/DC input, activated within <1 ns upon overvoltage detection. Use Value: Limits voltage to ≤125 V during 10/1000 µs surges, preventing damage to TPS543B20 and SN65HVD230 components. |
Use Scenario: Shielding 4–20 mA transmitter analog outputs from ESD and field-wiring induced transients. IC Role / Device Role / Timing Role: Unidirectional shunt clamp on output line, absorbing ±8 kV contact ESD (IEC 61000-4-2) and inductive kickback. Use Value: Maintains signal integrity below 125 V clamping threshold while adding <1 pF capacitance - no bandwidth degradation. |
| Telecom Line Card Surge Protection | Motor Drive Control Logic Protection |
Use Scenario: Safeguarding Ethernet PHY power pins (3.3 V/5 V) on base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after primary GDT, clamping residual transients before LDO regulators. Use Value: Delivers 1500 W pulse handling with 125 V clamping - compatible with 100 V-rated TPS7A47 LDO input stage. |
Use Scenario: Protecting isolated gate driver bias supplies (e.g., Si8233BD) in 48 V BLDC inverters from MOSFET switching noise. IC Role / Device Role / Timing Role: Localized TVS on 15 V auxiliary rail, triggered by dV/dt >100 V/ns from adjacent power stage. Use Value: Clamps transients to 125 V within 1 ns - prevents false triggering and latch-up in digital isolators. |
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; 90 V VBR (min 85.5 V), 1000 W PPPM, 139 V VC at 7.2 A | Lower power rating and higher clamping voltage - suited for space-constrained PCBs but less robust for load dump | Select SMBJ90A only when board area is critical and surge energy is limited to ≤1000 W |
| 1.5KE91AHE3_B | Same electrical specs; AEC-Q101 qualified, HE3 whisker-tested, B revision code | Qualified for automotive under-hood use per AEC-Q101 - required for ASIL-B designs | Choose 1.5KE91AHE3_B for automotive OEM programs requiring full qualification documentation |
Compared with 1.5KE91-E3/54, SMBJ90A offers smaller footprint but reduced surge margin, while 1.5KE91AHE3_B provides identical protection with certified automotive reliability - enabling direct substitution only when qualification compliance is mandatory.
Availability
1.5KE91-E3/54 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, RoHS compliance, and traceable sourcing.
Supply support for 1.5KE91-E3/54 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, thermal performance, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where 1500 W pulse handling and wide temperature operation are essential.
FAQ
What is the clamping voltage of the 1.5KE91-E3/54 at its rated peak pulse current?
The 1.5KE91-E3/54 has a maximum clamping voltage (VC) of 125 V at 12.0 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and ensures predictable voltage limiting during surge events. The 1.5KE91-E3/54 maintains this clamping performance across its full operating temperature range (-55 °C to +175 °C), making it suitable for under-hood automotive applications.
Is the 1.5KE91-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE91-E3/54 carries the E3 suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the device passes JESD 201 Class 1A whisker testing. The molding compound is UL 94 V-0 rated, and no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE substances exceed threshold limits - confirmed in Vishay's material declaration for document 88301.
Can the 1.5KE91-E3/54 be used in bidirectional configurations?
No, the 1.5KE91-E3/54 is a unidirectional TVS diode. Bidirectional variants in the same family use the "CA" suffix (e.g., 1.5KE91CA). The 1.5KE91-E3/54 features a cathode band marking and conducts only in reverse breakdown - it must be oriented with cathode toward the protected high-side rail. Using it in reverse polarity or attempting bidirectional operation will result in forward conduction and failure to suppress positive transients.
What is the maximum allowable junction temperature for continuous operation of the 1.5KE91-E3/54?
The 1.5KE91-E3/54 has a maximum junction temperature (TJ) rating of +175 °C, with storage temperature matching that range (-55 °C to +175 °C). For continuous DC operation, derating begins above 25 °C ambient per Figure 5 in the datasheet: at 75 °C lead temperature (TL), power dissipation drops to 6.5 W. The 1.5KE91-E3/54 achieves this via RθJL = 15.4 °C/W, enabling reliable thermal management in enclosed industrial enclosures.
How does the 1.5KE91-E3/54 compare to the 1.5KE91A in terms of electrical specifications?
The 1.5KE91-E3/54 and 1.5KE91A share identical electrical characteristics: VBR = 86.5–95.5 V, VWM = 77.8 V, VC = 125 V, and PPPM = 1500 W. The "E3/54" suffix denotes RoHS-compliant packaging (E3) and tape-and-reel delivery (54 = 13" reel, 1400 units). No parametric deviation exists - the 1.5KE91-E3/54 is the commercial-grade, standard-reliability version of the 1.5KE91A baseline device.
1.5KE91-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE91-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE91-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE91-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE91-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91-E3/54?
1.5KE91-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91-E3/54 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-E3/54?
For technical support, including 1.5KE91-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91-E3/54 requirements.
6.How does Aetrix verify that 1.5KE91-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE91-E3/54?
All 1.5KE91-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE91-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE91-E3/54 Tags
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