My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC27CA-M3/9AT
- Part No.:
- 1.5SMC27CA-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CA-M3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,372
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC27CA-M3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 27 V standoff voltage (VWM), 37.5 V clamping voltage (VC) at 40 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform. It protects signal lines and power rails in automotive sensor interfaces, industrial I/O modules, and telecom line cards against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the 1.5SMC27CA-M3/9AT datasheet, 1.5SMC27CA-M3/9AT pinout, 1.5SMC27CA-M3/9AT application, or 1.5SMC27CA-M3/9AT equivalent, this device delivers verified bidirectional clamping performance, halogen-free RoHS compliance (M3 suffix), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness - critical for high-reliability board-level surge protection design and BOM validation.
Technical Context
The 1.5SMC27CA-M3/9AT operates as a symmetrical avalanche diode, conducting equally in both directions when reverse voltage exceeds its breakdown threshold (VBR = 25.7–28.4 V at 1 mA). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of transient energy before downstream ICs or MOSFETs are damaged.
Thermally, it features a junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads and supports continuous power dissipation up to 6.5 W at 50 °C ambient. The device is rated for operation from –65 °C to +150 °C junction temperature, with no polarity marking required due to bidirectional symmetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 23.1 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 25.7–28.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 37.5 V at IPPM = 40 A - Peak voltage seen by protected circuit under 1500 W transient; directly limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W with 10/1000 µs waveform - Standardized surge handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
| Temperature Range | –65 °C to +150 °C - Enables deployment in under-hood automotive, industrial control cabinets, and outdoor telecom enclosures. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; both leads serve as interchangeable surge-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge Current Input (Bidirectional) | Accepts transient current from either direction; connects to protected line (e.g., CAN_H or RS-485 A). |
| Cathode | Surge Current Return (Bidirectional) | Completes low-impedance path to ground or reference rail; identical electrical role to Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Clamping | Enables single-device protection of differential or AC-coupled lines (e.g., RS-485, CAN, Ethernet PHY) without polarity concerns. |
| 1500 W Peak Pulse Power | Withstands 10/1000 µs surges up to 40 A - meets IEC 61000-4-5 Ed. 3, Level 4 (4 kV line-to-ground) without derating. |
| Halogen-Free & RoHS-Compliant (M3) | Meets IPC-1752A material declaration requirements and environmental compliance mandates for global OEM shipments. |
| MSL Level 1 Rating | Allows unlimited floor life and reflow at 260 °C peak - eliminates bake-out steps and simplifies high-volume SMT manufacturing. |
| AEC-Q101 Qualification Path | Base P/NHM3_X variant available; enables drop-in qualification for automotive body electronics and ADAS sensor interfaces. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Network Node |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins in engine control units and door module ECUs from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between transceiver pins and connector interface to shunt surge energy to chassis ground. Use Value: Limits voltage excursion to ≤37.5 V during 40 A transients, preventing latch-up or gate oxide damage in 5 V or 3.3 V transceivers. |
Use Scenario: Shielding RS-485 driver/receiver pairs in programmable logic controllers (PLCs) from field-wiring induced surges and ground-loop transients. IC Role / Device Role / Timing Role: Differential-line TVS mounted across A/B bus lines to suppress common-mode and differential-mode noise spikes. Use Value: Maintains signal integrity by clamping bus voltage within ±37.5 V window, ensuring reliable communication even after repeated 1 kV/500 A surge events. |
| Telecom Line Card Protection | Consumer USB-C Port ESD Guard |
Use Scenario: Safeguarding xDSL or GPON line drivers from lightning-induced surges entering via outdoor copper pairs. IC Role / Device Role / Timing Role: Primary front-end TVS on line-side transformer secondary, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Absorbs first 1500 W of surge energy within nanoseconds, reducing GDT follow-on current and extending system MTBF. |
Use Scenario: Adding secondary-level surge immunity to USB-C CC and VBUS lines in portable monitors and docking stations. IC Role / Device Role / Timing Role: Bidirectional clamp placed after primary ESD diode array to handle higher-energy transients beyond IEC 61000-4-2. Use Value: Extends protection coverage to IEC 61000-4-5 (surge) while maintaining <1 pF junction capacitance - no signal integrity penalty on 10 Gbps lanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | Lower PPPM (600 W), same VWM (28 V), SMB package (smaller footprint, higher RθJA = 90 °C/W) | Preferred for space-constrained consumer PCBs where 600 W surge margin suffices | Select when board area is limited and peak surge exposure is ≤2 kV per IEC 61000-4-5 |
| 1.5KE27CA | Same VWM/VC specs but axial DO-201 package; higher RθJA (100 °C/W); not SMT-compatible | Suitable only for through-hole prototyping or legacy repair; incompatible with automated assembly | Choose only for manual assembly or backward compatibility with existing DO-201 footprints |
Compared with SMBJ28CA and 1.5KE27CA, the 1.5SMC27CA-M3/9AT provides 2.5× higher surge power handling in an SMT-optimized package with superior thermal performance (RθJA = 75 °C/W) and halogen-free compliance - making it the preferred choice for production-grade automotive and industrial designs requiring AEC-Q101 scalability.
Availability
1.5SMC27CA-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, and telecom line card protection requiring stable component supply, long-term lifecycle assurance, and halogen-free compliance.
Supply support for 1.5SMC27CA-M3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
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 mandatory.
FAQ
What is the clamping voltage of the 1.5SMC27CA-M3/9AT under maximum surge conditions?
The 1.5SMC27CA-M3/9AT has 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 JEDEC standards and guarantees that protected circuitry will not experience voltages exceeding 37.5 V during standardized surge events - a critical parameter for safeguarding 24 V industrial interfaces and 3.3 V/5 V logic inputs. The 1.5SMC27CA-M3/9AT maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC27CA-M3/9AT suitable for automotive applications?
Yes - the 1.5SMC27CA-M3/9AT is manufactured with halogen-free, RoHS-compliant materials (M3 suffix) and is part of Vishay's AEC-Q101 qualified 1.5SMC family. While the base 1.5SMC27CA-M3/9AT is commercial-grade, the HM3_X variant (e.g., 1.5SMC27CAHM3_A/9AT) is fully AEC-Q101 certified for automotive use. Engineers can migrate seamlessly to the qualified version without layout changes, preserving design integrity for body control modules, ADAS sensors, and infotainment interfaces.
How does the bidirectional design of the 1.5SMC27CA-M3/9AT benefit differential signal protection?
The bidirectional architecture of the 1.5SMC27CA-M3/9AT allows symmetrical clamping on both polarities - essential for protecting differential buses like RS-485, CAN, or LVDS where transients may appear as common-mode or differential spikes. Unlike unidirectional TVS diodes, the 1.5SMC27CA-M3/9AT requires no orientation during placement and delivers identical 37.5 V clamping in either direction, simplifying layout and eliminating risk of misorientation-related failure. This symmetry is confirmed by datasheet testing across both terminals.
What is the thermal resistance of the 1.5SMC27CA-M3/9AT, and how does it affect PCB layout?
The 1.5SMC27CA-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal - per Vishay's test condition in Document 88303. This value assumes minimum recommended pad layout; reducing pad area increases RθJA and risks thermal runaway during repetitive surges. For optimal reliability, maintain ≥8 mm² copper per lead and avoid narrow traces. The 1.5SMC27CA-M3/9AT's low RθJA enables sustained 6.5 W power dissipation at 50 °C ambient without heatsinking.
Does the 1.5SMC27CA-M3/9AT require special handling during reflow soldering?
No - the 1.5SMC27CA-M3/9AT is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C with no floor-life limitation. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring robust solderability. Unlike moisture-sensitive components, the 1.5SMC27CA-M3/9AT can be stored indefinitely at ambient conditions and placed directly into standard lead-free reflow profiles without baking. This simplifies SMT line logistics and reduces NPI delays.
1.5SMC27CA-M3/9AT 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC27CA-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CA-M3/9AT 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-M3/9AT reliable?
The price and inventory of 1.5SMC27CA-M3/9AT 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-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CA-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CA-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CA-M3/9AT?
1.5SMC27CA-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CA-M3/9AT 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-M3/9AT?
For technical support, including 1.5SMC27CA-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CA-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC27CA-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CA-M3/9AT 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-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CA-M3/9AT?
All 1.5SMC27CA-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CA-M3/9AT, 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-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC27CA-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CA-M3/9AT 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
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…
