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Vishay General Semiconductor - Diodes Division 1.5KE9.1C-E3/73
- Part No.:
- 1.5KE9.1C-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1C-E3/73.pdf
- Description:
- TVS DIODE 7.37VWM 13.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
1.5KE9.1C-E3/73 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in signal and power lines. It features a 9.1 V breakdown voltage (VBR = 8.65–9.55 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 13.4 V at 112 A, and operates across –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE9.1C-E3/73 datasheet, 1.5KE9.1C-E3/73 pinout, 1.5KE9.1C-E3/73 application, or 1.5KE9.1C-E3/73 equivalent, this device delivers verified bidirectional clamping performance, RoHS-compliant matte tin-plated leads, UL 94 V-0 molded epoxy packaging, and AEC-Q101 qualification availability - critical for automotive and industrial surge protection design validation.
Technical Context
This TVS diode employs a glass passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating signal paths without polarity constraints.
It sustains 1500 W peak pulse power per 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance RθJL = 15.4 °C/W enabling effective lead-based heat dissipation. Standoff voltage is 7.78 V, reverse leakage ≤1.0 µA at VWM, and maximum operating junction temperature is +175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA test current - defines precise clamping onset threshold for bidirectional transient suppression |
| VWM | 7.78 V - maximum continuous working voltage before leakage exceeds 1.0 µA; sets safe operating margin below breakdown |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage during full 1500 W surge, limiting downstream component stress |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, validated for lightning and EFT immunity |
| TJ range | –55 °C to +175 °C - wide junction temperature range supports under-hood automotive and industrial ambient conditions |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package with 0.375" (9.5 mm) lead length, UL 94 V-0 compliant epoxy body |
| RoHS & Qualification | E3 suffix = RoHS-compliant commercial grade; HE3 variant available for AEC-Q101 qualified applications |
Pinout & Package
1.5KE9.1C-E3/73 uses a two-terminal axial-leaded DO-201AD (Case Style 1.5KE) package. No polarity marking is present on bidirectional variants; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals serve as clamping nodes - no cathode band; device conducts identically in either direction above VBR |
| Leads (matte tin plated) | Thermal and electrical interface | Supports J-STD-002 solderability and 275 °C/10 s solder dip; primary heat path via leads (RθJL = 15.4 °C/W) |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repetitive surge stress |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive interfaces |
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or polymer-based protectors, preserving signal integrity |
| UL 94 V-0 epoxy molding | Self-extinguishing encapsulation meets fire-safety standards for enclosed electronic enclosures |
| AEC-Q101 qualification option (HE3) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance testing |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits induced surges to ≤13.4 V, preventing latch-up or gate oxide damage in 5 V/3.3 V automotive ICs while maintaining signal fidelity. |
Use Scenario: Shielding 24 V DC digital input modules in programmable logic controllers from field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series impedance and filtering. Use Value: Absorbs up to 1500 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding Ethernet PHYs and DSL line drivers against lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Bidirectional TVS placed between line pairs and ground, often in conjunction with gas discharge tubes. Use Value: Clamps 10/1000 µs surges to 13.4 V before they reach sensitive PHY circuitry, meeting GR-1089-CORE telecom surge requirements. |
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C and wall adapter outputs exposed to hot-plug and cable ESD events. IC Role / Device Role / Timing Role: Final-stage transient limiter after DC-DC regulation, protecting connected devices from output rail excursions. Use Value: Prevents >12 V excursions during fault conditions, ensuring USB-IF compliance and safeguarding smartphone/tablet charging circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | DO-214AA (SMB) package; lower 600 W PPPM; VC = 14.4 V @ 41.7 A | Compact surface-mount alternative for space-constrained PCBs; not axial-leaded | Select when board area is limited and 600 W surge rating suffices; requires re-layout for SMT placement |
| 1.5KE9.1A-E3/73 | Unidirectional version; same VBR/VC/PPPM; cathode band marking; VF = 3.5 V @ 100 A | Required where DC bias or polarity-sensitive clamping is needed (e.g., DC power rails) | Choose only for unidirectional signal or supply lines; not interchangeable with 1.5KE9.1C-E3/73 in AC or floating applications |
Compared with SMBJ9.0CA, 1.5KE9.1C-E3/73 offers 2.5× higher surge power and axial-leaded through-hole mounting; versus 1.5KE9.1A-E3/73, it provides symmetrical clamping essential for AC-coupled or differential interfaces without polarity constraints.
Availability
1.5KE9.1C-E3/73 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface designs requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE9.1C-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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent 1500 W surge handling, wide temperature operation, and robust packaging for industrial and transportation systems.
FAQ
What is the clamping voltage of the 1.5KE9.1C-E3/73 under full-rated surge current?
The 1.5KE9.1C-E3/73 clamps to a maximum of 13.4 V when subjected to its rated peak pulse current of 112 A (10/1000 µs waveform). This value is measured per JEDEC standard test conditions and ensures downstream ICs see voltage limited well below destructive thresholds. The 1.5KE9.1C-E3/73 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE9.1C-E3/73 suitable for automotive applications?
Yes - while the base 1.5KE9.1C-E3/73 is RoHS-compliant commercial grade, the HE3 variant (e.g., 1.5KE9.1C-HE3_B) is AEC-Q101 qualified and approved for automotive use. The 1.5KE9.1C-E3/73 itself shares identical electrical specs and construction, making it suitable for non-safety-critical automotive subsystems where qualification is not mandated.
How does the bidirectional configuration of the 1.5KE9.1C-E3/73 affect circuit placement?
The 1.5KE9.1C-E3/73 has no polarity marking and functions identically in both directions, allowing direct placement across AC-coupled lines, transformer secondaries, or differential pairs without orientation concerns. Unlike unidirectional TVS diodes, the 1.5KE9.1C-E3/73 eliminates risk of incorrect installation and simplifies layout for balanced interfaces.
What is the thermal resistance profile of the 1.5KE9.1C-E3/73, and how does it impact PCB layout?
The 1.5KE9.1C-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W, meaning most heat is conducted through its axial leads. For reliable operation under repeated surges, PCB traces connected to both leads should be wide (≥2 mm) and thermally relieved minimally; copper pour under the body is unnecessary and provides negligible benefit.
Can the 1.5KE9.1C-E3/73 be used in parallel to increase surge current handling?
No - due to manufacturing tolerances in VBR (±5%), paralleling multiple 1.5KE9.1C-E3/73 units causes uneven current sharing and potential thermal runaway. For higher surge ratings, select a single higher-power device (e.g., 3KP9.0CA) or implement external current-sharing resistors - though the latter degrades clamping speed and is not recommended for fast transients.
1.5KE9.1C-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE9.1C-E3/73 FAQ
1.How can I place an order for 1.5KE9.1C-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1C-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 1.5KE9.1C-E3/73 reliable?
The price and inventory of 1.5KE9.1C-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 1.5KE9.1C-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1C-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1C-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1C-E3/73?
1.5KE9.1C-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1C-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 1.5KE9.1C-E3/73?
For technical support, including 1.5KE9.1C-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1C-E3/73 requirements.
6.How does Aetrix verify that 1.5KE9.1C-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1C-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 1.5KE9.1C-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1C-E3/73?
All 1.5KE9.1C-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1C-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 1.5KE9.1C-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE9.1C-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1C-E3/73 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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