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Vishay General Semiconductor - Diodes Division 1.5KE9.1CA-E3/51
- Part No.:
- 1.5KE9.1CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE9.1CA-E3/51.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
1.5KE9.1CA-E3/51 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 in automotive sensor interfaces and industrial I/O protection where fast-response surge suppression is critical.
For engineers reviewing the 1.5KE9.1CA-E3/51 datasheet, 1.5KE9.1CA-E3/51 pinout, 1.5KE9.1CA-E3/51 application, or 1.5KE9.1CA-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, thermal derating curves, and RoHS-compliant commercial-grade sourcing support - all specific to the 1.5KE9.1CA-E3/51 variant.
Technical Context
This device implements a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) to transient overvoltages, enabling protection of downstream ICs before damage occurs. Its bidirectional architecture ensures symmetrical clamping in both polarities without polarity marking, with VWM = 7.78 V and maximum ID = 50 µA at stand-off voltage.
The 1.5KE9.1CA-E3/51 sustains 1500 W peak pulse power per JEDEC standard waveform (10/1000 µs), exhibits low incremental surge resistance, and maintains stable clamping performance up to TJ = 175 °C. Its RθJA = 75 °C/W and RθJL = 15.4 °C/W define thermal limits under pulsed and continuous conditions.
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 at which clamping initiates in either direction |
| VWM | 7.78 V - maximum continuous reverse working voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.4 V at 112 A - clamped voltage during full 1500 W transient, limiting stress on protected circuitry |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform, critical for lightning/ESD immunity |
| TJ range | –55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | JEDEC 1.5KE case - axial-leaded DO-201AD outline, compatible with through-hole PCB assembly and manual rework |
| RoHS status | E3 suffix - RoHS-compliant, matte tin-plated leads, JESD 201 Class 1A whisker tested |
Pinout & Package
1.5KE9.1CA-E3/51 uses the JEDEC 1.5KE (DO-201AD) axial-leaded package: molded epoxy body, glass-passivated junction, no polarity marking for bidirectional operation. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional current path | No cathode band; terminals interchangeable - supports AC line and differential signal protection without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Sub-nanosecond response time | Clamps transients within <1 ns - faster than MOVs or gas discharge tubes, preserving signal integrity in high-speed interfaces |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without degradation when properly heatsinked |
| Low clamping ratio (VC/VBR) | 1.47 (13.4 V / 9.1 V) - minimizes overvoltage overshoot during clamping, reducing risk to 3.3 V/5 V logic |
| Glass passivated junction | Enhances reliability and moisture resistance vs. epoxy-only passivation - validated for 1000-hr HAST testing |
| Commercial-grade AEC-Q101 option available | HE3 suffix variants (e.g., 1.5KE9.1CAHE3_B) meet automotive qualification - not applicable to E3/51, but confirms family robustness |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., temperature, pressure) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply rail to clamp ±100 V transients within nanoseconds. Use Value: Prevents latch-up or gate oxide rupture in 5 V tolerant transceivers by limiting voltage to ≤13.4 V during 10/1000 µs surges. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and 0–10 V analog inputs in programmable logic controllers against field-induced surges. IC Role / Device Role / Timing Role: Standoff-connected TVS absorbing induced lightning energy on long cable runs before it reaches precision ADCs or op-amps. Use Value: Maintains signal accuracy by holding leakage below 50 µA at 7.78 V while surviving repeated 1500 W pulses without parameter drift. |
| Consumer Power Adapter Output Protection | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters and USB PD chargers exposed to mains-borne transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC output to shunt surge current away from downstream DC-DC converters and USB controllers. Use Value: Enables compliance with UL 62368-1 Annex D by clamping 1.2/50 µs surges to <15 V, preventing secondary-side component failure. |
Use Scenario: Primary protection for Ethernet PHYs and DSL line drivers connected to unshielded outdoor telephone lines. IC Role / Device Role / Timing Role: First-stage TVS on line interface, coordinated with GDT or PTC to handle multi-kV lightning strikes per ITU-T K.20/K.21. Use Value: Provides low-capacitance (<100 pF), low-VC clamping that preserves signal rise time while diverting >100 A surge currents. |
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 | Smaller SMB (DO-214AA) package; lower PPPM = 600 W; VBR = 10.0–11.1 V; VC = 15.4 V @ 39.0 A | Surface-mount only; unsuitable for high-energy surges exceeding 600 W; better for space-constrained PCBs | Select when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3 (2 kV/12 Ω) |
| 1.5KE9.1A-E3/54 | Unidirectional version; identical VBR, VWM, PPPM, and package; includes cathode band marking | Requires correct polarity placement; used where DC bias exists and reverse conduction must be blocked | Choose for DC-coupled rails or single-polarity signal paths where asymmetric clamping is acceptable |
Compared with 1.5KE9.1CA-E3/51, SMBJ9.0CA trades peak power and ruggedness for compactness, while 1.5KE9.1A-E3/54 offers polarity-aware clamping at identical energy rating - neither is pin-compatible due to differing polarity marking and package form factor, making 1.5KE9.1CA-E3/51 the sole choice for bidirectional, through-hole, 1500 W protection.
Availability
1.5KE9.1CA-E3/51 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC analog inputs, and telecom line card surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KE9.1CA-E3/51 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 handling, and automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting applications demanding >1000 W surge capability, wide operating temperature, and proven field longevity - especially in transportation and industrial control systems.
FAQ
What is the breakdown voltage tolerance for 1.5KE9.1CA-E3/51?
The 1.5KE9.1CA-E3/51 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 margining in safety-critical protection circuits.
Is 1.5KE9.1CA-E3/51 RoHS compliant and lead-free?
Yes, the "E3" suffix in 1.5KE9.1CA-E3/51 explicitly denotes RoHS compliance per EU Directive 2011/65/EU, with matte tin-plated leads and no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. It meets JESD 201 Class 1A whisker testing and is rated for solder dip at 275 °C for 10 seconds.
Does 1.5KE9.1CA-E3/51 have AEC-Q101 qualification?
No, the 1.5KE9.1CA-E3/51 is a commercial-grade part. AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE9.1CAHE3_B), as confirmed in Vishay Document 88301 footnote (2). The E3/51 variant is intended for industrial and consumer applications where automotive qualification is not required.
What is the maximum clamping voltage of 1.5KE9.1CA-E3/51 under surge conditions?
The 1.5KE9.1CA-E3/51 clamps to a maximum of 13.4 V when subjected to its rated peak pulse current of 112 A (10/1000 µs waveform), as specified in the Electrical Characteristics table of Vishay Document 88301. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Can 1.5KE9.1CA-E3/51 be used in parallel for higher surge current handling?
Yes, multiple 1.5KE9.1CA-E3/51 devices can be paralleled to increase total surge current capacity, provided layout symmetry, equal trace inductance, and thermal coupling are maintained. Vishay's Application Notes confirm this practice for scaling beyond 112 A, though derating and matching VBR within ±3% is recommended to ensure balanced current sharing.
1.5KE9.1CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE9.1CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE9.1CA-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE9.1CA-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE9.1CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE9.1CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE9.1CA-E3/51?
1.5KE9.1CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE9.1CA-E3/51 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-E3/51?
For technical support, including 1.5KE9.1CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE9.1CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE9.1CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE9.1CA-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE9.1CA-E3/51?
All 1.5KE9.1CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE9.1CA-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE9.1CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE9.1CA-E3/51 Tags
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