My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE9.1CA-E3/54
- Part No.:
- 1.5KE9.1CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA-E3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,030
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE9.1CA-E3/54 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 nominal breakdown voltage (VBR = 8.65–9.55 V at 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 surges and inductive switching transients in automotive and industrial control systems.
For engineers reviewing the 1.5KE9.1CA-E3/54 datasheet, 1.5KE9.1CA-E3/54 pinout, 1.5KE9.1CA-E3/54 application, or 1.5KE9.1CA-E3/54 equivalent, this device delivers verified bidirectional clamping performance with low incremental surge resistance, fast sub-nanosecond response, and RoHS-compliant matte tin-plated leads - critical for high-reliability transient suppression in space-constrained PCB layouts.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for bidirectional transient suppression without polarity marking. Its clamping behavior is symmetric in both directions, with a maximum clamping voltage (VC) of 13.4 V at 112 A peak pulse current (IPPM), and exhibits a temperature coefficient of VBR of +0.068 %/°C.
It complies with JEDEC standards for transient suppressors and supports repetitive surge duty cycles up to 0.01 % under 10/1000 µs waveform conditions. Thermal resistance is rated at 15.4 °C/W (junction-to-lead), enabling effective heat dissipation in leaded through-hole mounting configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65 V / 9.55 V at 1.0 mA - defines precise voltage threshold where clamping initiates reliably |
| VWM | 7.78 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 112 A - peak clamped voltage during 1500 W transient, limiting stress on downstream components |
| PPPM | 1500 W - peak pulse power handling capability per 10/1000 µs waveform, suitable for lightning-level surges |
| IPPM | 112 A - maximum non-repetitive surge current the device sustains without failure |
| TJ range | –55 °C to +175 °C - enables operation in under-hood automotive and industrial environments |
| RθJL | 15.4 °C/W - low thermal resistance ensures stable junction temperature under surge conditions with proper lead heatsinking |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated axial leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), 0.375" (9.5 mm) lead length standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; common terminal in bidirectional configuration | No polarity marking - symmetrical conduction allows use without orientation check on PCB |
| Cathode | Current exit point in forward bias; common terminal in bidirectional configuration | Identical electrical behavior to anode - terminals are functionally interchangeable for transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-earth) in properly designed circuits |
| Sub-nanosecond response time | Clamps transients within ≤1 ns, protecting sensitive CMOS inputs before damage occurs |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
| AEC-Q101 qualified variants available | HE3 suffix versions meet automotive-grade stress testing requirements (not applicable to E3/54 variant) |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and LIN bus nodes from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rail and ground to shunt surge energy before it reaches voltage regulators and microcontrollers. Use Value: Limits transient voltage to ≤13.4 V, preventing latch-up or gate oxide rupture in 16 V-rated automotive ICs. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Low-capacitance TVS placed differential-mode across signal pair to clamp common-mode transients induced by nearby motor drives. Use Value: Maintains signal integrity below 13.4 V clamping level while adding <1 pF parasitic capacitance at 1 MHz. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Board |
Use Scenario: Shielding RS-485 transceivers in outdoor telecom cabinets from induced lightning surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional TVS connected between differential lines and chassis ground to absorb common-mode energy without disrupting DC bias. Use Value: Withstands 112 A surge current and recovers fully after event, ensuring uninterrupted serial communication. |
Use Scenario: Protecting H-bridge gate drivers and MCU GPIOs in washing machine control boards from back-EMF spikes generated by universal motors. IC Role / Device Role / Timing Role: Mounted across motor coil terminals and across VDD/GND rails to suppress both inductive kickback and supply rail collapse. Use Value: Delivers 1500 W pulse power handling without degradation, extending board lifetime in high-cycle appliance applications. |
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 | Surface-mount SMB package (vs. axial 1.5KE); lower PPPM = 600 W; VC = 14.4 V @ 41.7 A | Better suited for compact PCBs with automated assembly; not mechanically compatible with through-hole layouts | Select when board space is constrained and surge levels are ≤600 W; verify thermal pad layout for sustained power dissipation |
| 1.5KE9.1C | Same 1.5KE package and electrical specs but lacks E3 RoHS compliance marking and JESD 201 Class 1A whisker test certification | Acceptable for non-RoHS commercial applications; not approved for lead-free soldering processes requiring whisker resistance | Choose only for legacy designs where RoHS and whisker compliance are not required; verify procurement traceability |
Compared with SMBJ9.0CA and 1.5KE9.1C, the 1.5KE9.1CA-E3/54 provides certified RoHS compliance, JESD 201 Class 1A whisker resistance, and full 1500 W surge capacity in a proven axial through-hole package - making it optimal for industrial and automotive replacement programs requiring documented material compliance and mechanical robustness.
Availability
1.5KE9.1CA-E3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full RoHS and lead-free process compatibility.
Supply support for 1.5KE9.1CA-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 high-reliability diodes, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing repeatable clamping performance, thermal stability, and mechanical ruggedness in axial-leaded packaging.
FAQ
What is the breakdown voltage tolerance for 1.5KE9.1CA-E3/54?
The 1.5KE9.1CA-E3/54 has a guaranteed breakdown voltage range of 8.65 V to 9.55 V at 1.0 mA test current, per Vishay Document 88301. This ±5 % tolerance ensures consistent clamping initiation across production lots and temperature extremes, supporting reliable design margins in safety-critical protection circuits.
Is 1.5KE9.1CA-E3/54 suitable for automotive applications?
The 1.5KE9.1CA-E3/54 is RoHS-compliant and rated for –55 °C to +175 °C operation, but it is not AEC-Q101 qualified. For automotive use, Vishay offers the 1.5KE9.1CAHE3_B variant (AEC-Q101 qualified). Engineers must select 1.5KE9.1CA-E3/54 only for non-safety-critical or commercial-grade automotive subsystems where formal qualification is not mandated.
What does the "CA" suffix indicate in 1.5KE9.1CA-E3/54?
The "CA" suffix in 1.5KE9.1CA-E3/54 denotes a bidirectional configuration - meaning the device clamps voltage transients equally in both polarities, with no cathode band marking. This eliminates orientation concerns during manual or automated placement and simplifies circuit design for AC-coupled or floating signal lines.
How does the clamping voltage of 1.5KE9.1CA-E3/54 compare to its breakdown voltage?
The 1.5KE9.1CA-E3/54 clamps at 13.4 V when subjected to its rated 112 A peak pulse current (10/1000 µs), which is approximately 40 % above its minimum breakdown voltage (8.65 V). This controlled voltage overshoot ensures protected ICs experience minimal overvoltage stress while maintaining sufficient margin to avoid false triggering during normal operation.
What is the lead finish and soldering compatibility of 1.5KE9.1CA-E3/54?
The 1.5KE9.1CA-E3/54 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 1A whisker testing. It supports lead-free reflow and wave soldering up to 275 °C for 10 seconds, making it compatible with modern RoHS-compliant manufacturing processes without risk of tin whisker growth.
1.5KE9.1CA-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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE9.1CA-E3/54 FAQ
1.How can I place an order for 1.5KE9.1CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA-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 1.5KE9.1CA-E3/54 reliable?
The price and inventory of 1.5KE9.1CA-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 1.5KE9.1CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA-E3/54?
1.5KE9.1CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA-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 1.5KE9.1CA-E3/54?
For technical support, including 1.5KE9.1CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE9.1CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA-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 1.5KE9.1CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA-E3/54?
All 1.5KE9.1CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA-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 1.5KE9.1CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
