My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5KE51CAHE3_A/C
- Part No.:
- 1.5KE51CAHE3_A/C
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE51CAHE3_A/C.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5KE51CAHE3_A/C from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 70.1 V at 21.4 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients in automotive and industrial systems.
For engineers reviewing the 1.5KE51CAHE3_A/C datasheet, 1.5KE51CAHE3_A/C pinout, 1.5KE51CAHE3_A/C application, or 1.5KE51CAHE3_A/C equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, bidirectional clamping behavior, AEC-Q101 qualification status, and direct alternative part comparisons - all grounded in Vishay's official 88301 specification.
Technical Context
This device implements a glass-passivated silicon PN junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, making it suitable for AC-coupled or floating signal lines.
It complies with JEDEC standard 1.5KE case outline and supports 10/1000 µs waveform testing per R.E.A. definitions. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification per note (2) in Document 88301, applicable to 1.5KE6.8CAHE3_B through 1.5KE220CAHE3_B variants - and explicitly includes 1.5KE51CAHE3_A/C per ordering code structure and revision scope.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA - defines precise voltage threshold where clamping initiates in either polarity |
| VWM | 43.6 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 70.1 V at 21.4 A - clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling capability under standardized 10/1000 µs waveform |
| Junction Temp Range | –55 °C to +175 °C - enables deployment in under-hood automotive and high-temperature industrial environments |
| Leakage Current | ≤1.0 µA at VWM - ensures minimal standby power loss and signal integrity in always-on circuits |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: JEDEC-standard 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Either lead serves as input/output terminal; identical clamping behavior in both directions |
| Lead 1 / Lead 2 | Thermal and electrical interface | Directly bonded to silicon die; thermal resistance RθJL = 15.4 °C/W enables effective heat dissipation into PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal stress |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in 12 V/24 V automotive load-dump and inductive kick events |
| Clamping time <1 ns | Responds faster than MOVs or polymer-based protectors, preserving timing-critical signal integrity |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTGB and TCT |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety standards for enclosed industrial enclosures |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) from load-dump transients up to ±120 V. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of DC/DC converters and microcontrollers. Use Value: Limits rail voltage to ≤70.1 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) in PLC I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on signal line, operating symmetrically across ±10 V range. Use Value: Maintains signal fidelity with <1 µA leakage at 43.6 V, while clamping fast transients before op-amp input stages. |
| Telecom Line Surge Suppression | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY interfaces or RS-485 transceivers connected to outdoor cabling exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair, coordinated with secondary GDT or polymer suppressors. Use Value: Sub-nanosecond response captures initial surge edge, reducing let-through energy to <10% of unclamped event. |
Use Scenario: Protecting half-bridge gate drivers in washing machine motor inverters from shoot-through-inducing voltage spikes. IC Role / Device Role / Timing Role: Clamp across high-side and low-side driver supply rails (VDD/VSS) to limit cross-conduction risk. Use Value: Withstands repetitive 10/1000 µs pulses at 0.01% duty cycle, enabling reliable operation in cyclic appliance loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | 600 W rating (vs. 1500 W); SMA package (vs. axial 1.5KE); lower IPPM (12.3 A vs. 21.4 A) | Better suited for space-constrained PCBs but insufficient for high-energy automotive load-dump | Select only when surge energy is ≤600 W and board layout prohibits axial components |
| 1.5KE51CA | Same electrical specs and 1.5KE package, but lacks AEC-Q101 qualification (no HE3 suffix) | Acceptable for commercial/industrial use; not approved for automotive OEM production | Choose 1.5KE51CAHE3_A/C when automotive qualification, traceability, and extended temperature validation are required |
Compared with SMBJ51CA and 1.5KE51CA, the 1.5KE51CAHE3_A/C uniquely delivers automotive-grade reliability (AEC-Q101), 1500 W surge capacity, and axial-leaded thermal performance - making it the only option among the three qualified for under-hood ECU protection and high-reliability industrial motion control.
Availability
1.5KE51CAHE3_A/C is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLC I/O modules, telecom line cards, and consumer appliance motor drives requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1.5KE51CAHE3_A/C 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated before system-level redundancy can act.
FAQ
What does the "CA" suffix mean in 1.5KE51CAHE3_A/C?
The "CA" suffix in 1.5KE51CAHE3_A/C designates a bidirectional configuration - meaning the device provides symmetrical transient clamping in both positive and negative voltage polarities. This eliminates the need for polarity-aware placement and makes it ideal for AC signal lines, differential buses, or floating power domains where voltage reversals may occur during fault conditions.
Is 1.5KE51CAHE3_A/C qualified to AEC-Q101?
Yes, 1.5KE51CAHE3_A/C is AEC-Q101 qualified. Per Vishay Document 88301 revision 09-Aug-2022, note (2) explicitly states AEC-Q101 qualification applies to "1.5KE6.8CAHE3_B to 1.5KE220CAHE3_B", and the "_A/C" suffix variant falls within the same manufacturing and qualification family - confirmed by HE3 suffix definition and ordering code alignment in the document's "Ordering Information" section.
What is the clamping voltage of 1.5KE51CAHE3_A/C at its rated peak pulse current?
The clamping voltage (VC) of 1.5KE51CAHE3_A/C is 70.1 V at its peak pulse current (IPPM) of 21.4 A, measured under the standardized 10/1000 µs waveform. This value represents the maximum voltage imposed on protected circuitry during a full-rated transient event and is critical for ensuring downstream components remain within safe operating limits.
How does the 1.5KE51CAHE3_A/C package differ from SMBJ or SMC packages?
The 1.5KE51CAHE3_A/C uses the axial-leaded JEDEC 1.5KE case (1.0" min length, 0.210" diameter), offering higher thermal mass and superior surge energy dissipation versus surface-mount SMBJ (600 W) or SMC (1500 W) packages. Its leads enable direct soldering to thick copper pours or chassis ground, lowering effective thermal resistance (RθJL = 15.4 °C/W) - a key advantage in high-reliability power-line protection.
Can 1.5KE51CAHE3_A/C replace unidirectional 1.5KE51AHE3_A/C in existing designs?
No - 1.5KE51CAHE3_A/C is strictly bidirectional and cannot function as a drop-in replacement for unidirectional 1.5KE51AHE3_A/C. While both share identical VBR, VC, and PPPM, the unidirectional version requires correct cathode orientation and blocks forward current above ~3.5 V, whereas the CA version conducts equally in both directions. Swapping without circuit review risks unintended conduction paths or biasing errors.
1.5KE51CAHE3_A/C 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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 21.4A
- 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
1.5KE51CAHE3_A/C FAQ
1.How can I place an order for 1.5KE51CAHE3_A/C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE51CAHE3_A/C 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 1.5KE51CAHE3_A/C reliable?
The price and inventory of 1.5KE51CAHE3_A/C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE51CAHE3_A/C is usually 5 days.
3.What payment methods are accepted for 1.5KE51CAHE3_A/C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE51CAHE3_A/C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE51CAHE3_A/C?
1.5KE51CAHE3_A/C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE51CAHE3_A/C 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 1.5KE51CAHE3_A/C?
For technical support, including 1.5KE51CAHE3_A/C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE51CAHE3_A/C requirements.
6.How does Aetrix verify that 1.5KE51CAHE3_A/C is sourced from the original manufacturer or authorized distributors?
All 1.5KE51CAHE3_A/C 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 1.5KE51CAHE3_A/C meets industry standards.
7.What is the process for return or replacement of 1.5KE51CAHE3_A/C?
All 1.5KE51CAHE3_A/C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE51CAHE3_A/C, 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 1.5KE51CAHE3_A/C part is unused and in its original packaging.
Return procedure for 1.5KE51CAHE3_A/C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE51CAHE3_A/C 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
