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Vishay General Semiconductor - Diodes Division 1.5KE27CA-E3/51
- Part No.:
- 1.5KE27CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE27CA-E3/51.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,319
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Product details
Overview
1.5KE27CA-E3/51 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 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 37.5 V at 40 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.
For engineers reviewing the 1.5KE27CA-E3/51 datasheet, 1.5KE27CA-E3/51 pinout, 1.5KE27CA-E3/51 application, or 1.5KE27CA-E3/51 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, JEDEC 1.5KE package details, thermal derating curves, and direct alternatives for surge protection design validation.
Technical Context
This device implements an avalanche breakdown-based transient suppression mechanism with glass-passivated junction construction, enabling sub-nanosecond response time (<1 ns) and low incremental surge resistance. Its bidirectional symmetry ensures identical clamping performance in both polarities, eliminating polarity-dependent layout constraints.
Rated for 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, it sustains 40 A peak pulse current (IPPM) while limiting voltage to 37.5 V - critical for safeguarding 3.3 V/5 V/24 V logic and power rails. Thermal resistance is 15.4 °C/W (junction-to-lead), supporting high-reliability operation without forced cooling in standard PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise voltage threshold where avalanche conduction begins, ensuring reliable triggering before downstream component damage |
| VWM | 23.1 V - maximum continuous reverse working voltage; circuit must operate below this to avoid leakage-induced power loss or false triggering |
| VC @ IPPM | 37.5 V at 40 A - clamped voltage during worst-case surge; determines maximum stress on protected ICs or MOSFETs |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity; enables protection against IEC 61000-4-5 Level 4 (4 kV) transients |
| IPPM | 40 A - maximum non-repetitive surge current; sets minimum trace width and fuse coordination requirements |
| TJ range | –55 °C to +175 °C - supports automotive under-hood, industrial motor drive, and outdoor telecom deployments without derating |
| Package | JEDEC DO-201AD (1.5KE) - axial-leaded, through-hole package with 9.5 mm lead length; compatible with wave soldering per JESD 22-B106 (275 °C, 10 s) |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated leads; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Identical terminals - either end conducts during positive or negative surge; no cathode band; eliminates orientation errors in PCB assembly |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance (±5%) and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power | Supports single-event surge immunity up to IEC 61000-4-5 4 kV (line-earth) without degradation |
| Sub-nanosecond response time | Clamps transients before propagation into sensitive circuitry - critical for protecting high-speed digital interfaces and gate drivers |
| AEC-Q101 qualification option | Available in HE3 variant (e.g., 1.5KE27CAHE3_B); validated for automotive powertrain and body electronics applications |
| UL 497B recognition | Qualified as protector under UL file E136766 - simplifies safety certification for industrial and telecom equipment |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in engine control units (ECUs) and body control modules (BCMs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed upstream of DC-DC converters and microcontrollers to limit transient voltage to safe levels. Use Value: Withstands 1500 W surges and maintains VC ≤ 37.5 V, preventing latch-up or gate oxide rupture in downstream 3.3 V/5 V logic. |
Use Scenario: Shielding analog and digital sensor outputs (e.g., CAN, LIN, thermocouple amplifiers) from ESD and cable discharge events in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to shunt fast transients before reaching precision front-end circuitry. Use Value: Sub-ns response ensures clamping occurs prior to signal integrity corruption; bidirectional symmetry avoids polarity miswiring in field-deployed sensors. |
| Telecom AC/DC Power Input Stage | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding primary-side rectifier and SMPS controller ICs in DSL modems and VoIP gateways exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Primary-level TVS connected across bridge rectifier output to clamp line-to-line and line-to-ground transients. Use Value: 175 °C max junction temperature allows operation near heat-generating transformers; UL 497B recognition satisfies telecom safety compliance. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines and HVAC blowers that threaten MCU GPIOs and driver ICs. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across motor terminals to absorb stored inductive energy during commutation. Use Value: 40 A IPPM rating handles repetitive switching surges; glass passivation ensures stability across 10,000+ motor cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), smaller SMB package (surface-mount), VBR = 26.7–29.5 V | Designed for space-constrained PCBs; unsuitable for high-energy surges requiring 1500 W capability | Select when board area is limited and surge threat level is ≤ IEC 61000-4-5 Level 2 (1 kV) |
| 1.5KE27A-E3/51 | Unidirectional version; same VBR, VC, and PPPM; includes cathode band marking | Requires correct polarity placement; used where DC bias prevents reverse conduction (e.g., DC power rails with known polarity) | Choose only if system has fixed unidirectional voltage polarity and polarity-aware layout is acceptable |
Compared with 1.5KE27CA-E3/51, SMBJ24CA trades surge robustness for compactness, while 1.5KE27A-E3/51 retains full 1500 W capability but introduces polarity dependency - making 1.5KE27CA-E3/51 optimal for generic, polarity-agnostic protection in mixed-signal or AC-coupled circuits.
Availability
1.5KE27CA-E3/51 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor controls requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE27CA-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial, automotive, and computing applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering consistent clamping performance, AEC-Q101 qualification paths, and UL safety recognition for mission-critical power and interface protection.
FAQ
What is the breakdown voltage tolerance for 1.5KE27CA-E3/51?
The 1.5KE27CA-E3/51 has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, corresponding to ±5% tolerance around the nominal 27 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, directly supporting compliance with IEC 61000-4-5 surge immunity requirements in designs using the 1.5KE27CA-E3/51.
Is 1.5KE27CA-E3/51 RoHS compliant and lead-free?
Yes, the 1.5KE27CA-E3/51 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a. Its matte tin-plated leads meet J-STD-002 solderability standards and JESD 201 Class 1A whisker resistance requirements. The molding compound is UL 94 V-0 rated, and the device contains no intentionally added lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE.
How does the bidirectional nature of 1.5KE27CA-E3/51 affect PCB layout?
The 1.5KE27CA-E3/51 has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation check during placement. This eliminates risk of reverse installation in high-volume manufacturing and simplifies routing for AC-coupled or floating signal lines - unlike unidirectional variants such as 1.5KE27A-E3/51, which require strict cathode alignment. The symmetric terminal structure also supports balanced differential protection schemes.
What is the maximum clamping voltage of 1.5KE27CA-E3/51 under surge conditions?
The 1.5KE27CA-E3/51 clamps to a maximum of 37.5 V when subjected to its rated 40 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–55 °C to +175 °C) and defines the upper voltage limit imposed on protected circuitry during worst-case transients - a key parameter for validating compatibility with 3.3 V, 5 V, or 24 V system rails.
Can 1.5KE27CA-E3/51 be used in parallel to increase surge handling capacity?
Yes, multiple 1.5KE27CA-E3/51 devices can be paralleled to distribute surge current and increase total peak pulse power handling, provided matched VBR units are selected and PCB layout ensures symmetrical trace impedance to each device. However, derating by ≥20% per unit is recommended due to minor VBR variation; for higher reliability, consider higher-rated single devices like 1.5KE33CA-E3/51 instead of parallel 1.5KE27CA-E3/51 units.
1.5KE27CA-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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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
1.5KE27CA-E3/51 FAQ
1.How can I place an order for 1.5KE27CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE27CA-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 1.5KE27CA-E3/51 reliable?
The price and inventory of 1.5KE27CA-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 1.5KE27CA-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE27CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE27CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE27CA-E3/51?
1.5KE27CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE27CA-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 1.5KE27CA-E3/51?
For technical support, including 1.5KE27CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE27CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE27CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE27CA-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 1.5KE27CA-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE27CA-E3/51?
All 1.5KE27CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE27CA-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 1.5KE27CA-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE27CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE27CA-E3/51 Tags
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ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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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
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