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Vishay General Semiconductor - Diodes Division 1.5KE9.1A-E3/54
- Part No.:
- 1.5KE9.1A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1A-E3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
1.5KE9.1A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 8.65 V to 9.55 V breakdown voltage (VBR) at 1.0 mA, 7.78 V maximum standoff 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 1.5KE9.1A-E3/54 datasheet, 1.5KE9.1A-E3/54 pinout, 1.5KE9.1A-E3/54 application, or 1.5KE9.1A-E3/54 equivalent, this page delivers verified electrical parameters, thermal derating behavior, JEDEC 1.5KE package dimensions, and direct alternatives for ESD/lightning surge protection in 12 V automotive and industrial control systems.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction, limiting downstream voltage to ≤13.4 V at 112 A. Its glass-passivated junction enables fast response (<1 ns) and stable clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
Thermal performance is defined by RθJA = 75 °C/W and RθJL = 15.4 °C/W, supporting operation from –55 °C to +175 °C junction temperature. The device complies with JESD 22-B106 (275 °C solder dip, 10 s) and meets UL 94 V-0 flammability requirements in its molded epoxy case.
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 threshold for reliable triggering in 9–10 V nominal systems |
| VWM | 7.78 V - maximum continuous reverse operating voltage; ensures no leakage conduction below system rail voltage |
| VC @ IPPM | 13.4 V at 112 A - clamping level limits protected IC voltage stress during 1500 W transients |
| PPPM | 1500 W - peak pulse power handling per 10/1000 µs waveform, enabling robust lightning/inductive-switching surge suppression |
| IPPM | 112 A - peak pulse current capacity directly supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance testing |
| TJ max. | +175 °C - high-temperature capability allows placement near hot components (e.g., power MOSFETs, DC-DC converters) |
| Package | JEDEC DO-201AD (Case Style 1.5KE) - axial-leaded, through-hole mountable package with 0.375" lead length for mechanical stability and thermal relief |
Pinout & Package
1.5KE9.1A-E3/54 uses the standard DO-201AD axial package (Case Style 1.5KE), with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Polarity is marked by a cathode band; the banded end is the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; forms shunt path during overvoltage events |
| Cathode (banded end) | High-side transient sink | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<50 µA at VWM), and long-term reliability under thermal cycling |
| 1500 W peak pulse power | Supports single-event surge immunity up to IEC 61000-4-5 4 kV (2 Ω source) without degradation |
| Sub-nanosecond response time | Clamps transients before sensitive logic or analog circuitry sustains damage - critical for CAN/LIN bus and MCU I/O protection |
| AEC-Q101 qualification option | HE3 suffix variants are qualified for automotive applications; E3/54 is commercial-grade but shares identical die and construction |
| UL 94 V-0 molding compound | Prevents flame propagation in enclosure-mounted designs, meeting industrial safety standards (e.g., UL 508, IEC 62368) |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a, up to 60 V/100 ms) and alternator ripple. IC Role / Device Role: Primary shunt clamp on main power rail, placed upstream of DC-DC converter input. Use Value: Limits voltage to ≤13.4 V during 112 A transients, preventing overvoltage failure of buck controller ICs and gate drivers. | Use Scenario: 4–20 mA current loop sensors in factory automation subject to ESD (IEC 61000-4-2 ±8 kV contact) and cable-induced surges. IC Role / Device Role: Bidirectional protection on signal pair (with series resistor), though 1.5KE9.1A-E3/54 serves unidirectional rail-to-ground clamping. Use Value: Clamps induced common-mode spikes to safe levels before reaching precision op-amps or ADC front-ends, preserving measurement integrity. |
| Consumer Power Adapter Output Protection | Telecom DC Feeder Line Protection |
Use Scenario: 9 V output of wall adapters powering IoT hubs, where poor-quality switching supplies generate overshoot and ring. IC Role / Device Role: Final-stage overvoltage limiter between adapter and system PMIC. Use Value: Absorbs 1500 W pulses without latch-up, maintaining regulated 9 V delivery while protecting USB-C PD controllers and LDOs. | Use Scenario: -48 V DC feeder lines in telecom base stations subjected to lightning-induced longitudinal surges (IEC 61643-21). IC Role / Device Role: Unidirectional shunt protector referenced to chassis ground on power feed inputs. Use Value: Withstands repeated 10/1000 µs surges up to 112 A, ensuring uptime in outdoor cabinet installations without replacement after minor events. |
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 | Targeted at space-constrained PCBs; insufficient for 1500 W IEC 61000-4-5 Level 4 testing | Select SMBJ9.0A only when board area is critical and surge threat level is limited to IEC 61000-4-2/4-4. |
| 1.5KE9.1CA | Bidirectional variant; same VBR, VC, and PPPM; symmetric clamping for AC-coupled or floating lines | Required for differential signal protection (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose 1.5KE9.1CA instead of 1.5KE9.1A-E3/54 only when protecting bidirectional or AC-signaled paths. |
Compared with SMBJ9.0A and 1.5KE9.1CA, the 1.5KE9.1A-E3/54 uniquely balances high-power through-hole ruggedness (1500 W), proven automotive-grade thermal margin (175 °C), and cost-effective axial packaging - making it optimal for industrial power entry and legacy automotive modules where layout flexibility and surge margin outweigh footprint constraints.
Availability
1.5KE9.1A-E3/54 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power distribution systems requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE9.1A-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, power efficiency, and AEC-Q qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and thermal resilience are non-negotiable design requirements.
FAQ
What is the breakdown voltage range of the 1.5KE9.1A-E3/54?
The 1.5KE9.1A-E3/54 has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V at a test current of 1.0 mA, measured per JEDEC standard. This tight 10% tolerance ensures predictable clamping onset in 9 V nominal systems and supports consistent overvoltage protection across production lots without recalibration.
Is the 1.5KE9.1A-E3/54 RoHS compliant and halogen-free?
Yes, the 1.5KE9.1A-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and halogen-free status per IEC 61249-2-21. The matte tin-plated leads meet JESD 201 Class 1A whisker resistance, and the UL 94 V-0 epoxy body contains no brominated flame retardants.
Can the 1.5KE9.1A-E3/54 be used in bidirectional signal protection?
No - the 1.5KE9.1A-E3/54 is strictly unidirectional. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled lines), use the 1.5KE9.1CA variant, which provides symmetrical clamping in both polarities. Using the unidirectional 1.5KE9.1A-E3/54 on bidirectional signals risks forward conduction and permanent damage during negative transients.
What is the maximum clamping voltage of the 1.5KE9.1A-E3/54 under surge conditions?
The 1.5KE9.1A-E3/54 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 test conditions and represents the worst-case voltage seen by downstream circuitry during a full-power transient event.
Does the 1.5KE9.1A-E3/54 require a heatsink for continuous operation?
No heatsink is required for transient suppression, as the device handles energy in short pulses (≤1 ms). However, for continuous power dissipation, its 6.5 W rating at TL = 75 °C assumes adequate PCB copper pour and lead length (0.375"). Derating begins above 25 °C ambient per Figure 2; at 70 °C ambient, usable power drops to ~3.5 W.
1.5KE9.1A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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
1.5KE9.1A-E3/54 FAQ
1.How can I place an order for 1.5KE9.1A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1A-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 1.5KE9.1A-E3/54 reliable?
The price and inventory of 1.5KE9.1A-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 1.5KE9.1A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1A-E3/54?
1.5KE9.1A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1A-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 1.5KE9.1A-E3/54?
For technical support, including 1.5KE9.1A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE9.1A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1A-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 1.5KE9.1A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1A-E3/54?
All 1.5KE9.1A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1A-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 1.5KE9.1A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE9.1A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1A-E3/54 Tags
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