My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC27CA-E3/9AT
- Part No.:
- 1.5SMC27CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CA-E3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,565
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC27CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 23.1 V standoff voltage (VWM), 25.7–28.4 V breakdown voltage (VBR) at 1 mA, 37.5 V maximum clamping voltage (VC) at 40 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC27CA-E3/9AT datasheet, 1.5SMC27CA-E3/9AT pinout, 1.5SMC27CA-E3/9AT application, or 1.5SMC27CA-E3/9AT equivalent, key selection criteria include bidirectional clamping behavior, SMC (DO-214AB) package compatibility, JEDEC-compliant thermal derating, AEC-Q101 qualification eligibility, and compliance with UL 497B surge protector requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding VWM, it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
The 1.5SMC27CA-E3/9AT delivers consistent clamping performance under repetitive 10/1000 μs surges at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads. Its bidirectional symmetry eliminates polarity concerns in AC-coupled or floating signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 23.1 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | 37.5 V at 40 A - Clamped voltage during 1500 W transient; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; validates suitability for lightning-induced surges per IEC 61000-4-5. |
| Junction Temp Range | −65 °C to +150 °C - Enables deployment in under-hood automotive, industrial control cabinets, and outdoor telecom enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.2 mm minimum cathode-to-anode distance; compatible with automated pick-and-place and reflow. |
| RoHS Status | E3 suffix - RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting J-STD-002 solderability. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with UL 94 V-0 flammability rating; terminals are matte tin-plated, solderable per J-STD-002; polarity unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during positive half-cycle surge | Symmetric conduction path - no fixed polarity; functions identically as cathode during negative transients. |
| Cathode | Current entry terminal during negative half-cycle surge | Same physical terminal as Anode due to bidirectional symmetry; no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating power rails without polarity constraints. |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) requirements when used with appropriate series impedance on 50 Ω source. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes let-through energy during transients - critical for safeguarding 3.3 V or 5 V logic interfaces and analog front-ends. |
| MSL Level 1 rating | Supports standard Pb-free reflow profiles (peak 260 °C) without baking or special handling - reduces manufacturing overhead. |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive applications; this E3/9AT variant is commercial-grade but shares identical die and package design. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector interface to clamp fast-rising spikes before reaching MCU or signal conditioner. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V automotive microcontrollers by limiting voltage to ≤37.5 V during 40 A transients. |
Use Scenario: Safeguarding digital input/output channels in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across isolated field-side terminals to absorb ±1 kV/500 A surges per IEC 61000-4-4. Use Value: Eliminates need for separate unidirectional devices per line, reducing BOM count and PCB area in multi-channel I/O modules. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Surge protection on POTS, DSL, or Ethernet PHY lines subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary-level protector upstream of GDT or MOV stages; handles initial fast-rising edge (tr < 1 ns) before slower devices activate. Use Value: Provides sub-100 ps response time and low dynamic impedance to suppress transients before they couple into transformer windings or PHY ICs. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters protecting USB-C PD controllers and DC-DC regulators. IC Role / Device Role / Timing Role: Clamp device across output rail to prevent >37.5 V excursions during output short-circuit recovery or feedback loop failure. Use Value: Complements primary-side protection by limiting fault voltage seen by downstream 24 V-rated components during abnormal regulation 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 |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), VC = 38.9 V @ 17.3 A | Best suited for space-constrained consumer electronics with lower surge exposure (IEC 61000-4-2 contact discharge only). | Select when board area is critical and peak surge energy is ≤600 W; verify thermal margin on 5.0 mm × 5.0 mm pads. |
| 1.5KE27CA | Through-hole TO-204AA (DO-15) package, same VWM/VBR/VC, higher RθJA (100 °C/W) | Preferred for legacy through-hole designs or high-reliability military/aerospace where manual assembly and mechanical robustness are prioritized. | Choose for prototyping, low-volume production, or environments requiring mechanical strain relief not offered by SMC's surface-mount leads. |
Compared with SMBJ24CA and 1.5KE27CA, the 1.5SMC27CA-E3/9AT offers superior power density (1500 W in SMC vs. 600 W in SMB) and better thermal performance than through-hole alternatives - making it optimal for high-surge industrial and automotive applications where board space and reliability are balanced.
Availability
1.5SMC27CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC27CA-E3/9AT 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, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, repeatable clamping, and AEC-Q101 readiness are essential.
FAQ
What is the standoff voltage (VWM) of the 1.5SMC27CA-E3/9AT?
The 1.5SMC27CA-E3/9AT has a standoff voltage (VWM) of 23.1 V, meaning it remains non-conductive under normal operating conditions up to this reverse voltage. This value is confirmed in Vishay's official datasheet (Document Number: 88303, page 2) and ensures compatibility with 24 V nominal systems where transient margins must be preserved.
Is the 1.5SMC27CA-E3/9AT bidirectional or unidirectional?
The 1.5SMC27CA-E3/9AT is a bidirectional TVS diode, indicated by the "CA" suffix per Vishay's naming convention. It provides symmetrical clamping in both polarities - verified by identical VBR, VC, and IPPM specifications for positive and negative surges - and carries no polarity marking on the SMC package.
Does the 1.5SMC27CA-E3/9AT meet AEC-Q101 qualification?
The 1.5SMC27CA-E3/9AT itself is RoHS-compliant commercial-grade (E3 suffix); however, the same die and package are qualified to AEC-Q101 in HE3/HM3 variants (e.g., 1.5SMC27CAHE3_A). The E3/9AT shares identical electrical and thermal specs but is not certified for automotive use unless explicitly ordered with HE3/HM3 suffixes.
What is the maximum clamping voltage (VC) of the 1.5SMC27CA-E3/9AT at rated peak current?
The 1.5SMC27CA-E3/9AT exhibits a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
What package type does the 1.5SMC27CA-E3/9AT use, and what are its key mechanical features?
The 1.5SMC27CA-E3/9AT uses the SMC (DO-214AB) package: a surface-mount outline measuring 7.75 mm × 6.22 mm × 2.62 mm, with UL 94 V-0 rated molding compound and matte tin-plated leads. Its MSL Level 1 rating permits standard lead-free reflow without preconditioning, and the unmarked body reflects its bidirectional functionality.
1.5SMC27CA-E3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC27CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC27CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CA-E3/9AT 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 1.5SMC27CA-E3/9AT reliable?
The price and inventory of 1.5SMC27CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CA-E3/9AT?
1.5SMC27CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CA-E3/9AT 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 1.5SMC27CA-E3/9AT?
For technical support, including 1.5SMC27CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC27CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CA-E3/9AT 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 1.5SMC27CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CA-E3/9AT?
All 1.5SMC27CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CA-E3/9AT, 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 1.5SMC27CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC27CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CA-E3/9AT 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 …
