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Vishay General Semiconductor - Diodes Division 1.5KE9.1-E3/54
- Part No.:
- 1.5KE9.1-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1-E3/54.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
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Product details
Overview
1.5KE9.1-E3/54 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 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 7.78 V maximum working voltage (VWM), 13.4 V clamping voltage (VC) at 112 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the 1.5KE9.1-E3/54 datasheet, 1.5KE9.1-E3/54 pinout, 1.5KE9.1-E3/54 application, or 1.5KE9.1-E3/54 equivalent, this part delivers verified transient suppression performance for 12 V rail protection, automotive body electronics, and telecom interface surge immunity where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.47), and AEC-Q101-qualified variants are critical selection criteria.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at VWM), but triggers into low-impedance conduction when transient voltage exceeds VBR. Its glass-passivated junction enables stable avalanche behavior and repeatable clamping across 1000+ surges.
The device uses a DO-201AE package with axial leads, rated for TJ = –55 °C to +175 °C operation, and exhibits a temperature coefficient of VBR = +0.068 %/°C - enabling predictable derating above 25 °C per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise turn-on threshold for reliable triggering before downstream component damage |
| VWM | 7.78 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 50 μA |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM | 1500 W - peak transient power dissipation capability, supporting IEC 61000-4-5 Level 4 (4 kV) surge testing |
| IFSM | 200 A (8.3 ms half-sine) - surge current handling for unidirectional AC line or motor-switching transients |
| TJ max. | +175 °C - enables use in under-hood automotive or high-ambient industrial environments without thermal shutdown |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, requiring minimal heatsinking for intermittent surge duty |
Pinout & Package
Package: DO-201AE (axial lead, molded epoxy case per JEDEC DO-201AD outline), RoHS-compliant, commercial grade, matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; polarity marked by absence of band (cathode is banded end) |
| Cathode | High-side surge sink terminal | Banded end connects to protected line; conducts transient current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, low-noise avalanche breakdown and long-term reliability under repetitive surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports robust protection against lightning-induced surges and inductive switching spikes in 12 V systems |
| Clamping ratio VC/VBR ≈ 1.47 | Minimizes overvoltage exposure to protected ICs while maintaining margin below absolute maximum ratings |
| Response time <1 ns | Engages before most semiconductor failure mechanisms initiate, preserving gate oxides and junction integrity |
| AEC-Q101 qualified variants available | Enables drop-in qualification for automotive body control modules and infotainment power inputs without revalidation |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery-supplied BCM exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients up to 13.4 V before they reach LDOs and microcontrollers. Use Value: Prevents latch-up and permanent damage to 5 V/3.3 V regulators and CAN transceivers during vehicle cranking and alternator field collapse events. | Use Scenario: 24 V digital input card receiving signals from proximity sensors in factory automation. IC Role / Device Role / Timing Role: TVS on each channel input to suppress ESD (IEC 61000-4-2) and inductive kickback from solenoid loads. Use Value: Maintains signal integrity and prevents false triggering or port latch-up in DIN-rail mounted controllers operating in electrically noisy environments. |
| Telecom Line Interface Surge Protection | Consumer Appliance Motor Drive Power Stage |
Use Scenario: RS-485 transceiver interface connected to outdoor cabling subject to induced lightning surges. IC Role / Device Role / Timing Role: Primary shunt protector on VCC rail and secondary protector on differential bus lines (with series impedance). Use Value: Limits common-mode surge energy to <13.4 V at the transceiver supply pins, meeting GR-1089-CORE Level 3 requirements without additional crowbar circuits. | Use Scenario: H-bridge gate driver IC powered from a local 12 V rail driving brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: TVS across motor supply rail to absorb back-EMF spikes generated during PWM commutation and sudden stop events. Use Value: Eliminates need for snubber RC networks while sustaining 200 A non-repetitive surge current, reducing BOM count and board space. |
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 | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 14.4 V @ 41.7 A | Preferred for space-constrained PCBs with lower surge threat levels (IEC 61000-4-5 Level 2) | Select when board area is limited and peak surge current remains below 42 A; requires layout revision due to SMD footprint |
| 1.5KE9.1AHE3_B | Same electrical specs, but AEC-Q101 qualified and HE3 whisker-tested (JESD 201 Class 2) | Required for automotive OEM production; supports extended temperature validation and zero-defect reliability programs | Choose for Tier 1 automotive designs where qualification traceability and long-term field reliability are mandatory |
Compared with 1.5KE9.1-E3/54, SMBJ9.0A trades surge robustness for compactness, while 1.5KE9.1AHE3_B retains identical protection performance but adds automotive-grade process controls and qualification - making the latter suitable for safety-critical deployment without design change.
Availability
1.5KE9.1-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom interface protection, and consumer appliance motor drive systems requiring stable component supply and full traceability.
Supply support for 1.5KE9.1-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where 1500 W surge handling and stable clamping under thermal stress are essential.
FAQ
What is the breakdown voltage tolerance for 1.5KE9.1-E3/54?
The 1.5KE9.1-E3/54 has a specified breakdown voltage range of 8.65 V to 9.55 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 9.1 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports reliable margining against downstream IC absolute maximum ratings in 12 V systems.
Does 1.5KE9.1-E3/54 meet automotive qualification standards?
The 1.5KE9.1-E3/54 is a commercial-grade variant and is not AEC-Q101 qualified. However, its pin-compatible counterpart 1.5KE9.1AHE3_B is fully AEC-Q101 qualified and shares identical electrical specifications - including VBR, VC, and PPPM - making it the designated option for automotive production programs requiring certified reliability.
How does the clamping voltage of 1.5KE9.1-E3/54 compare to its breakdown voltage?
The 1.5KE9.1-E3/54 clamps at 13.4 V when subjected to its rated 112 A peak pulse current (10/1000 µs), yielding a clamping ratio (VC/VBR) of approximately 1.47 using the typical VBR midpoint (9.1 V). This ratio reflects low incremental surge resistance and ensures protected circuits remain well within safe operating limits during transient events.
Can 1.5KE9.1-E3/54 be used in bidirectional configurations?
No - 1.5KE9.1-E3/54 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional versions require the "CA" suffix (e.g., 1.5KE9.1CA), which are symmetrically rated for both polarities and lack polarity markings. Using 1.5KE9.1-E3/54 in AC or floating applications would result in forward conduction during negative half-cycles and potential failure.
What is the maximum allowable junction temperature for continuous operation of 1.5KE9.1-E3/54?
The 1.5KE9.1-E3/54 has a maximum junction temperature (TJ) rating of +175 °C, with derating beginning above 25 °C ambient per Figure 2 in the datasheet. At TL = 75 °C (lead temperature), its steady-state power dissipation is limited to 6.5 W - sufficient for low-duty-cycle surge protection but not intended for continuous DC power regulation.
1.5KE9.1-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):
- 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-E3/54 FAQ
1.How can I place an order for 1.5KE9.1-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1-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 1.5KE9.1-E3/54 reliable?
The price and inventory of 1.5KE9.1-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 1.5KE9.1-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1-E3/54?
1.5KE9.1-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1-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 1.5KE9.1-E3/54?
For technical support, including 1.5KE9.1-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1-E3/54 requirements.
6.How does Aetrix verify that 1.5KE9.1-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1-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 1.5KE9.1-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1-E3/54?
All 1.5KE9.1-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1-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 1.5KE9.1-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE9.1-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1-E3/54 Tags
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