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Vishay General Semiconductor - Diodes Division 1.5KE9.1HE3/54
- Part No.:
- 1.5KE9.1HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1HE3/54.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,767
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Product details
Overview
1.5KE9.1HE3/54 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 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 in automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the 1.5KE9.1HE3/54 datasheet, 1.5KE9.1HE3/54 pinout, 1.5KE9.1HE3/54 application, or 1.5KE9.1HE3/54 equivalent, this part delivers verified AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin-plated leads, JESD 201 Class 2 whisker resistance, and UL 94 V-0 molded epoxy packaging - critical for automotive-grade ESD and load-dump surge resilience.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds its breakdown threshold, it avalanches into low-impedance conduction to divert surge energy away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling sub-nanosecond response time (<1 ns) to fast-rising transients like ISO 7637-2 Pulse 1/2a/5a.
Thermally, it supports operation from –55 °C to +175 °C junction temperature, with RθJA = 75 °C/W and RθJL = 15.4 °C/W, allowing direct PCB mounting without heatsink for short-duration surges. The 1.5KE package's 0.375" lead length and axial lead configuration are optimized for through-hole board-level surge suppression in high-reliability power entry circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche initiation window for repeatable clamping behavior |
| VWM | 7.78 V - maximum continuous DC or RMS voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 112 A - limits protected circuit voltage during 10/1000 µs surge, ensuring MOSFET gate or MCU I/O stays below absolute max ratings |
| PPPM | 1500 W - sustains single 1 ms transient events such as automotive load dump (ISO 16750-2) without failure |
| IFSM | 200 A (8.3 ms half-sine) - withstands repetitive inrush or fault currents in power supply front-ends |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| Package | Case Style 1.5KE - axial-leaded, UL 94 V-0 epoxy body, 0.375" (9.5 mm) lead length for mechanical strain relief |
Pinout & Package
1.5KE9.1HE3/54 uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE). The cathode is marked by a color band on the body; polarity must be observed for correct unidirectional clamping orientation in series with the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes clamping path during overvoltage event |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12 V battery rail); color band identifies this end for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and body electronics per stress test requirements |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime |
| 1500 W peak pulse power (10/1000 µs) | Handles ISO 7637-2 Pulse 5a (load dump) up to 120 V/100 ms without degradation |
| Sub-nanosecond response time | Clamps transients faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed interfaces |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation suitable for safety-critical enclosures and plenum-rated systems |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (up to 120 V, 400 ms) and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between battery rail and system ground, conducting only during overvoltage events. Use Value: Limits rail voltage to ≤13.4 V during 112 A surge, preventing damage to 16 V-rated DC-DC converters and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input modules. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at sensor connector to absorb ESD (IEC 61000-4-2) and inductive switching spikes. Use Value: Clamps 8 kV contact ESD to <13.4 V within <1 ns, avoiding latch-up or parametric shift in precision 4–20 mA transmitter ICs. |
| Consumer Power Adapter Output Protection | Telecom DC Power Feeder Protection |
Use Scenario: Secondary-side overvoltage protection on 9 V wall adapters powering IoT hubs and smart home controllers. IC Role / Device Role / Timing Role: Standby-mode protector across output capacitor, activated only during fault conditions (e.g., feedback loop failure). Use Value: Prevents >13.4 V from reaching USB-PD or PMIC inputs, eliminating risk of thermal runaway in downstream silicon. | Use Scenario: Surge protection on -48 V DC feeder lines supplying remote radio units in 4G/5G base stations. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional device used with reverse-polarity blocking diode for negative rail clamping. Use Value: Withstands 1500 W lightning-induced surges (IEC 61000-4-5) while maintaining <1 µA leakage at nominal -48 V operating point. |
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 | DO-214AA package (SMB), lower PPPM = 600 W, VC = 14.4 V @ 41.7 A | Surface-mount footprint; suited for space-constrained consumer PCBs but lacks AEC-Q101 qualification | Select SMBJ9.0A only for non-automotive, cost-sensitive designs where 600 W surge margin suffices |
| 1.5KE9.1A-E3/54 | Same 1.5KE package and electrical specs, but commercial-grade (E3 suffix), no AEC-Q101 qualification | Approved for industrial/commercial use only; not permitted in automotive OEM BOMs requiring AEC-Q101 | Choose 1.5KE9.1A-E3/54 for non-automotive applications where qualification documentation is unnecessary |
Compared with 1.5KE9.1HE3/54, SMBJ9.0A offers smaller size but sacrifices 60% peak power handling and automotive qualification; 1.5KE9.1A-E3/54 matches form-fit-function but omits AEC-Q101 evidence required for Tier 1 automotive sourcing.
Availability
1.5KE9.1HE3/54 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeders requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KE9.1HE3/54 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, ruggedness, and automotive-grade validation.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and infrastructure equipment where failure modes demand proven surge robustness.
FAQ
What is the clamping voltage of the 1.5KE9.1HE3/54 under a standard 10/1000 µs surge?
The 1.5KE9.1HE3/54 has a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 112 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components see no more than 13.4 V during such transient events - critical for protecting 12 V logic and power ICs. The 1.5KE9.1HE3/54 maintains this performance across its full operating temperature range.
Is the 1.5KE9.1HE3/54 qualified for automotive applications?
Yes, the 1.5KE9.1HE3/54 carries the HE3 suffix, which denotes AEC-Q101 qualification per Vishay's documentation. This certification covers stress tests including HTGB, HTRB, TCT, and ESD, validating its suitability for automotive powertrain, chassis, and body electronics. The 1.5KE9.1HE3/54 is explicitly listed in the AEC-Q101 qualified subset (1.5KE6.8AHE3_B to 1.5KE220AHE3_B), confirming its compliance status.
How does the 1.5KE9.1HE3/54 differ from the commercial-grade 1.5KE9.1A-E3/54?
The 1.5KE9.1HE3/54 differs from 1.5KE9.1A-E3/54 solely in qualification level: HE3 indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance, while E3 denotes commercial grade with JESD 201 Class 1A. Electrically and physically, both share identical VBR, VWM, VC, package, and thermal specs. The 1.5KE9.1HE3/54 is required for automotive OEM designs; 1.5KE9.1A-E3/54 suffices for industrial or consumer use.
What is the maximum operating temperature for the 1.5KE9.1HE3/54?
The 1.5KE9.1HE3/54 has a maximum junction temperature (TJ) of +175 °C and an operating storage temperature range of –55 °C to +175 °C. This wide range supports deployment in under-hood automotive environments, industrial motor controls, and outdoor telecom cabinets. Derating curves in the datasheet show usable power capability down to 50% at 125 °C ambient, confirmed by thermal resistance values RθJA = 75 °C/W and RθJL = 15.4 °C/W.
Does the 1.5KE9.1HE3/54 have UL recognition?
Yes, the 1.5KE9.1HE3/54 carries Underwriters Laboratories recognition under file number E136766 for both unidirectional and bidirectional variants, compliant with UL 497B for signal and power circuit protectors. Its molded epoxy case meets UL 94 V-0 flammability rating, satisfying safety requirements for enclosed equipment in industrial and telecom applications. This UL listing applies directly to the 1.5KE9.1HE3/54 as a member of the qualified 1.5KE family.
1.5KE9.1HE3/54 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE9.1HE3/54 FAQ
1.How can I place an order for 1.5KE9.1HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1HE3/54 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 1.5KE9.1HE3/54 reliable?
The price and inventory of 1.5KE9.1HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1HE3/54?
1.5KE9.1HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1HE3/54 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 1.5KE9.1HE3/54?
For technical support, including 1.5KE9.1HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1HE3/54 requirements.
6.How does Aetrix verify that 1.5KE9.1HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1HE3/54 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 1.5KE9.1HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1HE3/54?
All 1.5KE9.1HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1HE3/54, 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 1.5KE9.1HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE9.1HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1HE3/54 Tags
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