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Vishay General Semiconductor - Diodes Division 1.5KE9.1CHE3/54
- Part No.:
- 1.5KE9.1CHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CHE3/54.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,984
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Product details
Overview
1.5KE9.1CHE3/54 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 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 against inductive switching transients and ESD.
For engineers reviewing the 1.5KE9.1CHE3/54 datasheet, 1.5KE9.1CHE3/54 pinout, 1.5KE9.1CHE3/54 application, or 1.5KE9.1CHE3/54 equivalent, this part delivers verified clamping performance, AEC-Q101 qualification (HE3 suffix), RoHS-compliant matte tin leads, and UL 94 V-0 molded epoxy packaging - critical for automotive front-end power supply protection and industrial control I/O hardening.
Technical Context
This TVS diode operates as a silicon avalanche clamp, responding in <1 ns to transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise voltage limiting without thermal runaway under repetitive 10/1000 µs pulses at 0.01% duty cycle.
It is rated for continuous operation from –55 °C to +175 °C junction temperature, with thermal resistance of 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), supporting direct PCB mounting without heatsinking for short-duration surges up to 1500 W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 µA, ensuring no false conduction during normal operation |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage seen by protected circuit during full 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform, sufficient for IEC 61000-4-5 Level 4 surge immunity |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supports robustness against accidental polarity reversal events |
| TJ max. | +175 °C - high-temperature capability enables use in under-hood automotive environments and industrial motor drives |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package (0.375" lead length), compatible with wave soldering and manual assembly |
Pinout & Package
1.5KE9.1CHE3/54 uses a 2-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 in series connection with protected circuits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or lower-potential rail when used in unidirectional configuration for positive transient suppression |
| Cathode | Current exit point in forward bias; avalanche terminal in reverse bias | Connected to protected line (e.g., 12 V rail); conducts during overvoltage to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR over time and temperature, minimizing drift in critical protection thresholds |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive subsystems |
| UL 94 V-0 molded epoxy case | Provides flame-retardant mechanical encapsulation essential for safety-critical power supply designs |
| Matte tin plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102, supporting high-yield automated assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump transients (up to 60 V, 100 ms) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp overvoltage before it reaches LDOs and microcontrollers. Use Value: Limits peak voltage to 13.4 V during 112 A surge, preventing latch-up or gate oxide damage in downstream 16 V-rated ICs. | Use Scenario: Protecting 4–20 mA current loop transmitters from field-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Connected across loop terminals to divert induced lightning energy (IEC 61000-4-5) away from precision op-amps and ADC front-ends. Use Value: Clamps transients within 1 ns while maintaining <50 µA leakage at 7.78 V, preserving loop accuracy and zero-point stability. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers against mains-borne surges. IC Role / Device Role / Timing Role: Mounted across bulk capacitor input to absorb differential-mode surges before they stress bridge rectifiers and PWM controllers. Use Value: Handles 1500 W pulses without degradation, enabling compliance with UL 62368-1 surge withstand requirements. | Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers exposed to induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Placed between transformer secondary and PHY IC to clamp common-mode transients before signal conditioning stages. Use Value: Low clamping voltage (13.4 V) prevents PHY reset or damage while maintaining signal integrity up to 100 MHz. |
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 higher VC (14.5 V @ 103 A) | Designed for high-density PCB layouts where through-hole mounting is impractical | Select SMBJ9.0A only if board space constraints prohibit axial components and thermal mass from adjacent copper is sufficient to manage 1500 W pulse dissipation |
| 1.5KE9.1A-E3/54 | Same package and electrical specs, but commercial-grade (non-AEC-Q101) and E3-only (no HE3 qualification) | Approved for consumer and industrial applications without automotive qualification requirements | Choose 1.5KE9.1A-E3/54 when AEC-Q101 is not mandated and cost optimization is prioritized over automotive reliability validation |
Compared with SMBJ9.0A and 1.5KE9.1A-E3/54, the 1.5KE9.1CHE3/54 uniquely combines AEC-Q101 qualification, axial-leaded mechanical robustness for high-vibration environments, and proven 1500 W surge handling - making it the preferred choice for automotive power distribution modules and industrial PLC backplanes where long-term reliability under thermal stress is mandatory.
Availability
1.5KE9.1CHE3/54 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, traceable lot control, and long-term lifecycle support.
Supply support for 1.5KE9.1CHE3/54 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE family was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive power systems, industrial motor controls, and infrastructure equipment where failure due to voltage surges is unacceptable.
FAQ
What is the clamping voltage of the 1.5KE9.1CHE3/54 under full-rated surge conditions?
The 1.5KE9.1CHE3/54 exhibits a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 112 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry downstream will not experience voltages exceeding 13.4 V during a 1500 W transient event. The 1.5KE9.1CHE3/54 achieves this with sub-nanosecond response, ensuring minimal overshoot before clamping engages.
Is the 1.5KE9.1CHE3/54 suitable for automotive applications?
Yes, the 1.5KE9.1CHE3/54 is AEC-Q101 qualified (denoted by the HE3 suffix), confirming its suitability for automotive applications including engine control units, body control modules, and ADAS power supplies. It operates reliably from –55 °C to +175 °C, withstands mechanical vibration per AEC-Q200, and maintains specified VBR and VC parameters after thermal cycling and humidity exposure. The 1.5KE9.1CHE3/54 is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the 1.5KE family.
How does the 1.5KE9.1CHE3/54 differ from the standard 1.5KE9.1A-E3/54?
The 1.5KE9.1CHE3/54 differs from 1.5KE9.1A-E3/54 primarily in qualification and marking: the "H" in HE3 indicates AEC-Q101 qualification, while the "E3" denotes RoHS compliance and JESD 201 Class 1A whisker resistance. The 1.5KE9.1A-E3/54 lacks AEC-Q101 validation and is rated for commercial-grade use only. Both share identical electrical specs, package, and thermal characteristics, but only the 1.5KE9.1CHE3/54 is approved for automotive under-hood deployment.
What is the maximum reverse leakage current of the 1.5KE9.1CHE3/54 at its working voltage?
At its maximum stand-off voltage (VWM) of 7.78 V and ambient temperature of 25 °C, the 1.5KE9.1CHE3/54 exhibits a maximum reverse leakage current (ID) of 50 µA. This low leakage ensures minimal power loss and signal interference in always-on circuits such as automotive wake-up lines or sensor bias networks. The 1.5KE9.1CHE3/54 maintains this specification across its full operating temperature range, with leakage increasing predictably per datasheet derating curves.
Can the 1.5KE9.1CHE3/54 be used in bidirectional configurations?
No, the 1.5KE9.1CHE3/54 is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number. Bidirectional variants (e.g., 1.5KE9.1CAHE3/54) exist in the same family but are distinct orderable parts with symmetrical clamping in both polarities. Using the 1.5KE9.1CHE3/54 in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always verify polarity marking (cathode band) before installation of the 1.5KE9.1CHE3/54.
1.5KE9.1CHE3/54 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE9.1CHE3/54 FAQ
1.How can I place an order for 1.5KE9.1CHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CHE3/54 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 1.5KE9.1CHE3/54 reliable?
The price and inventory of 1.5KE9.1CHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE9.1CHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CHE3/54?
1.5KE9.1CHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CHE3/54 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 1.5KE9.1CHE3/54?
For technical support, including 1.5KE9.1CHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CHE3/54 requirements.
6.How does Aetrix verify that 1.5KE9.1CHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CHE3/54 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 1.5KE9.1CHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CHE3/54?
All 1.5KE9.1CHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CHE3/54, 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 1.5KE9.1CHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CHE3/54 Tags
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