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Vishay General Semiconductor - Diodes Division 1.5KE9.1-E3/73
- Part No.:
- 1.5KE9.1-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1-E3/73.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,181
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Product details
Overview
1.5KE9.1-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V maximum working peak reverse voltage (VWM), 13.4 V clamping voltage (VC) at 112 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs waveform), and operates across –55 °C to +175 °C junction temperature range.
For engineers reviewing the 1.5KE9.1-E3/73 datasheet, 1.5KE9.1-E3/73 pinout, 1.5KE9.1-E3/73 application, or 1.5KE9.1-E3/73 equivalent, this device serves as a robust, glass-passivated, leaded TVS solution for protecting MOSFETs, ICs, and sensor interfaces against inductive switching transients and lightning-induced surges in industrial and automotive power systems.
Technical Context
This unidirectional TVS diode uses a silicon avalanche junction with glass passivation to achieve sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR tolerance (±5%), low leakage (<50 µA at VWM), and stable thermal coefficient (0.068 %/°C).
The device complies with JEDEC standard test conditions (10/1000 µs waveform, 0.01% duty cycle), supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and maintains reliable operation up to 175 °C junction temperature - enabling use in high-temperature under-hood automotive and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - ensures precise, repeatable avalanche turn-on for predictable overvoltage protection |
| VWM | 7.78 V - maximum continuous reverse voltage before significant leakage, compatible with 5 V–9 V logic and power rails |
| VC @ IPPM | 13.4 V at 112 A - limits transient voltage seen by downstream components to safe levels during 1500 W surge events |
| PPPM | 1500 W (10/1000 µs) - delivers high-energy suppression capability for industrial motor drives and automotive load-dump scenarios |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-current inrush and fault currents without degradation |
| Junction Temp Range | –55 °C to +175 °C - supports operation in extreme ambient conditions including engine compartments and factory floors |
| Leakage @ VWM | <50 µA - minimizes standby power loss and avoids false triggering in low-power sensor circuits |
Pinout & Package
Package: Axial-leaded DO-201AD (Case Style 1.5KE), epoxy-molded body with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 9 V rail); color band identifies this end for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, low-noise avalanche performance and long-term reliability under repeated surge stress |
| 1500 W peak pulse power | Supports EN 61000-4-5 Level 4 (4 kV) surge immunity without external series impedance in many applications |
| Sub-nanosecond response | Clamps transients before sensitive ICs experience damaging overvoltage - critical for protecting fast-switching MOSFET gates |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, ensuring mechanical integrity in vibration-prone automotive and industrial assemblies |
| UL 497B recognized | Qualified for telecom and industrial surge protection systems requiring certified safety compliance (File E136766) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 9 V supply lines in engine control units (ECUs) from load-dump transients up to 120 V. IC Role / Device Role / Timing Role: Primary clamping device placed directly across input rail, absorbing energy before it reaches LDOs and microcontrollers. Use Value: Limits rail voltage to ≤13.4 V during 112 A surges, preventing latch-up and permanent damage to 12 V-tolerant analog front-ends. |
Use Scenario: Safeguarding 4–20 mA current-loop sensor outputs in PLC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Unidirectional shunt protector on transmitter output, referenced to system ground. Use Value: Clamps induced spikes to <14 V while maintaining <50 µA leakage - preserving loop accuracy and avoiding false zero-crossing detection. |
| DC Motor Drive Gate Protection | Telecom Line Interface Protection |
Use Scenario: Shielding N-channel MOSFET gate drivers in brushed DC motor controllers from inductive kickback. IC Role / Device Role / Timing Role: Fast-acting clamp between gate and source, triggered within <1 ns of overvoltage onset. Use Value: Holds gate-source voltage below 13.4 V during 100+ A flyback events, preventing oxide rupture and threshold shift in 20 V-rated FETs. |
Use Scenario: Secondary protection on low-voltage telecom interface cards (e.g., RS-485, CAN bus power) subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff device upstream of polymeric PTC and GDT, handling initial fast-rising edge. Use Value: Provides 1500 W pulse handling with 7.78 V standoff - compatible with 5 V–12 V interface rails and coordinated with upstream coarse protectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Surface-mount SMB package (vs. axial DO-201AD); same VBR range (8.55–9.45 V), slightly lower PPPM (600 W) | Requires PCB re-layout; better suited for space-constrained consumer electronics vs. through-hole industrial modules | Select when board area is limited and surge energy requirements are ≤600 W |
| 1.5KE9.1A-E3/54 | Same electrical specs and DO-201AD package; differs only in packaging format (13" tape-and-reel, 1400 pcs vs. 73 pcs bulk) | No functional or circuit-level difference - identical performance and mounting | Choose based on procurement volume and assembly method (pick-and-place vs. manual/hand-solder) |
Compared with SMBJ9.0A, 1.5KE9.1-E3/73 offers 2.5× higher surge power handling and proven reliability in high-temperature through-hole applications; compared with 1.5KE9.1A-E3/54, it provides identical protection performance but in smaller-batch bulk packaging suitable for prototyping and low-volume production.
Availability
1.5KE9.1-E3/73 is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, DC motor drive gate circuits, and telecom line protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE9.1-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, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing ruggedness, thermal stability, and consistent clamping performance across wide temperature ranges.
FAQ
What is the breakdown voltage tolerance for 1.5KE9.1-E3/73?
The 1.5KE9.1-E3/73 has a specified breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, representing a ±5% tolerance around the nominal 9.1 V rating. This tight VBR window ensures consistent clamping behavior across production lots and enables reliable coordination with downstream overvoltage thresholds in protected circuits. The 1.5KE9.1-E3/73 meets JEDEC-standard testing per document 88301.
Is 1.5KE9.1-E3/73 RoHS compliant and qualified for automotive use?
Yes, the 1.5KE9.1-E3/73 carries the "E3" suffix, indicating full RoHS compliance and qualification to JESD 201 Class 1A whisker resistance. While not AEC-Q101 qualified itself (which requires "HE3" suffix), it shares identical die and construction with AEC-Q101 variants like 1.5KE9.1AHE3_B and is widely deployed in automotive power modules where full qualification is not mandated. The 1.5KE9.1-E3/73 operates reliably from –55 °C to +175 °C.
How does the clamping voltage of 1.5KE9.1-E3/73 compare to its breakdown voltage?
The 1.5KE9.1-E3/73 clamps at 13.4 V when subjected to its rated 112 A peak pulse current (10/1000 µs waveform), which is approximately 47% above its minimum breakdown voltage of 8.65 V. This VC/VBR ratio reflects low incremental surge resistance and efficient energy absorption - critical for limiting stress on downstream 12 V-tolerant ICs. The 1.5KE9.1-E3/73 maintains this clamping performance across its full operating temperature range.
Can 1.5KE9.1-E3/73 be used in bidirectional configurations?
No, the 1.5KE9.1-E3/73 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5KE9.1CA). Using the 1.5KE9.1-E3/73 in AC or floating applications would result in forward conduction during negative half-cycles, causing failure. For bidirectional protection at ~9 V, specify 1.5KE9.1CA or confirm compatibility with the 1.5KE9.1-E3/73's unidirectional polarity in your circuit topology.
What is the maximum allowable lead temperature during soldering for 1.5KE9.1-E3/73?
The 1.5KE9.1-E3/73 supports solder dip at a maximum temperature of 275 °C for up to 10 seconds, per JESD 22-B106. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements. Reflow profiles must stay within this thermal limit to avoid internal delamination or junction damage. The 1.5KE9.1-E3/73's glass-passivated chip structure is particularly sensitive to thermal shock, so controlled heating/cooling rates are recommended.
1.5KE9.1-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):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 109A
- 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
1.5KE9.1-E3/73 FAQ
1.How can I place an order for 1.5KE9.1-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1-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 1.5KE9.1-E3/73 reliable?
The price and inventory of 1.5KE9.1-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 1.5KE9.1-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1-E3/73?
1.5KE9.1-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1-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 1.5KE9.1-E3/73?
For technical support, including 1.5KE9.1-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1-E3/73 requirements.
6.How does Aetrix verify that 1.5KE9.1-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1-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 1.5KE9.1-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1-E3/73?
All 1.5KE9.1-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1-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 1.5KE9.1-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE9.1-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1-E3/73 Tags
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