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Vishay General Semiconductor - Diodes Division 1.5KE91HE3/73
- Part No.:
- 1.5KE91HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE91HE3/73.pdf
- Description:
- TVS DIODE 73.7VWM 131VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,479
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Product details
Overview
1.5KE91HE3/73 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 in automotive power supply inputs, industrial sensor interfaces, and telecom line protection where fast-response surge suppression is required.
For engineers reviewing the 1.5KE91HE3/73 datasheet, 1.5KE91HE3/73 pinout, 1.5KE91HE3/73 application, or 1.5KE91HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJL = 15.4 °C/W), JEDEC 1.5KE package dimensions, and real-world design implications for transient immunity planning.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for low incremental surge resistance and sub-nanosecond response time (<1 ns). Its clamping behavior is defined by a tightly controlled VBR tolerance (±5%) and low temperature coefficient (0.106 %/°C), enabling stable protection across wide ambient ranges.
The device meets JESD 22-B106 solderability (275 °C, 10 s) and JESD 201 Class 2 whisker resistance (HE3 suffix), with RoHS-compliant matte tin-plated leads. It is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits 3.5 V forward voltage at 100 A - critical for minimizing conduction loss during high-current transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 77.8 V - maximum continuous working voltage before leakage exceeds 1.0 µA, sets safe DC operating margin |
| VC @ IPPM | 125 V at 12.0 A - actual clamped voltage during 1500 W transient, determines protected circuit's max stress level |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity, supports IEC 61000-4-5 Level 4 compliance |
| RθJL | 15.4 °C/W - low junction-to-lead thermal resistance enables effective heat dissipation into PCB copper without heatsink |
| TJ max | +175 °C - extended junction temperature rating allows use in under-hood automotive and high-ambient industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, and UHAST per AEC standard |
Pinout & Package
Package: JEDEC-standard Case Style 1.5KE - molded epoxy body with axial leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected circuit ground or low-side return path; must be routed with low-inductance trace |
| Cathode | Current exit point in forward bias; marked with color band | Connected to protected line (e.g., 12 V rail); polarity-sensitive placement prevents misapplication |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR and low leakage (<1.0 µA at VWM) over lifetime and temperature cycling |
| 1500 W peak pulse power | Supports robust protection against lightning-induced surges (IEC 61000-4-5) and inductive switch-off spikes |
| Sub-nanosecond response time | Clamps transients before sensitive ICs (e.g., microcontrollers, CAN transceivers) experience overstress |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensors |
| Matte tin plating, J-STD-002 compliant | Ensures reliable solder joint formation and long-term intermetallic stability in reflow and wave processes |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU input subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary shunt clamp on main power rail, absorbing >100 J pulses within <1 ns. Use Value: Limits rail voltage to ≤125 V during 1500 W transients, preventing damage to downstream LDOs and MCU power domains. |
Use Scenario: 4–20 mA current loop interface exposed to ESD (IEC 61000-4-2) and field wiring faults. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS placed across loop terminals to suppress common-mode surges. Use Value: Clamps induced transients to <125 V while maintaining <1 µA leakage at 24 V nominal, preserving loop accuracy. |
| Telecom DC Feeder Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: -48 V DC power feed to remote radio unit encountering lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail, referenced to system ground, handling repetitive 10/1000 µs events. Use Value: Withstands 1500 W pulses at 0.01% duty cycle and maintains VC ≤125 V, ensuring uninterrupted operation during storm conditions. |
Use Scenario: Brushed DC motor driver board where back-EMF spikes threaten gate drivers and logic ICs. IC Role / Device Role / Timing Role: Clamp across motor terminals or H-bridge supply rails to divert inductive kickback energy. Use Value: 200 A surge rating handles worst-case motor stall currents; 15.4 °C/W RθJL allows direct PCB copper cooling without heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Lower PPPM (600 W), smaller SMB package (vs. axial 1.5KE), VBR = 100–111 V, VC = 146 V @ 4.1 A | Not AEC-Q101 qualified; suited for space-constrained consumer boards, not under-hood automotive | Select when board area is limited and surge energy is ≤600 W; verify layout thermal relief for SMB footprint. |
| 1.5KE91A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101), HE3 suffix omitted, E3 only | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated | Choose for cost-sensitive non-automotive designs requiring identical clamping performance and axial form factor. |
Compared with 1.5KE91HE3/73, SMBJ90A trades surge capacity and qualification for compactness, while 1.5KE91A-E3/54 retains mechanical and electrical equivalence but omits automotive reliability validation - making the HE3/73 uniquely suited for safety-critical vehicular deployments.
Availability
1.5KE91HE3/73 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power feeds, and appliance motor drives requiring stable component supply with guaranteed AEC-Q101 compliance and long-term manufacturability.
Supply support for 1.5KE91HE3/73 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, emphasizing robustness, tight parametric control, and qualification to automotive and industrial reliability standards.
FAQ
What is the clamping voltage of the 1.5KE91HE3/73 under a 1500 W transient?
The 1.5KE91HE3/73 clamps to 125 V at its peak pulse current of 12.0 A, measured with a 10/1000 µs waveform. This value is specified in the Vishay datasheet (Document Number 88301, page 2) and represents the maximum voltage seen by downstream circuitry during full-rated surge events - critical for validating IC overvoltage margins.
Is the 1.5KE91HE3/73 AEC-Q101 qualified?
Yes, the 1.5KE91HE3/73 is AEC-Q101 qualified, as confirmed by Vishay's ordering information note (page 3, footnote 2) specifying that HE3 suffix devices from 1.5KE6.8AHE3_B to 1.5KE220AHE3_B meet AEC-Q101 requirements. This qualification covers HTOL, temperature cycling, and unbiased HAST testing for automotive use.
What is the maximum operating temperature for the 1.5KE91HE3/73?
The 1.5KE91HE3/73 has a maximum junction temperature (TJ) of +175 °C and an operating junction/storage range of –55 °C to +175 °C (page 1, PRIMARY CHARACTERISTICS). This extended rating supports deployment in engine compartments, industrial enclosures, and other high-ambient environments where thermal management is constrained.
How does the 1.5KE91HE3/73 differ from the 1.5KE91A-E3/54?
The 1.5KE91HE3/73 adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance (via HE3 suffix), whereas 1.5KE91A-E3/54 is commercial-grade only. Both share identical electrical specs (VBR, VC, PPPM) and 1.5KE package, but only the HE3/73 variant is approved for automotive safety-critical systems per AEC standard.
What is the thermal resistance from junction to lead (RθJL) for the 1.5KE91HE3/73?
The 1.5KE91HE3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, as stated in the Thermal Characteristics table (page 3). This low value enables efficient heat transfer from the die to PCB copper via the axial leads - essential for sustaining repetitive surge events without thermal runaway.
1.5KE91HE3/73 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE91HE3/73 FAQ
1.How can I place an order for 1.5KE91HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE91HE3/73 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 1.5KE91HE3/73 reliable?
The price and inventory of 1.5KE91HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE91HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE91HE3/73?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE91HE3/73?
1.5KE91HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE91HE3/73 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 1.5KE91HE3/73?
For technical support, including 1.5KE91HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE91HE3/73 requirements.
6.How does Aetrix verify that 1.5KE91HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE91HE3/73 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 1.5KE91HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE91HE3/73?
All 1.5KE91HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE91HE3/73, 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 1.5KE91HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE91HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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