My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC27A-E3/9AT
- Part No.:
- 1.5SMC27A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27A-E3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,086
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC27A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount 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), 23.1 V stand-off voltage (VWM), clamps to ≤37.5 V at 40 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC27A-E3/9AT datasheet, 1.5SMC27A-E3/9AT pinout, 1.5SMC27A-E3/9AT application, or 1.5SMC27A-E3/9AT equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, clamping performance under lightning surge conditions, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (23.1 V), it avalanches at VBR (min 25.7 V) and limits transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM).
Designed for high-reliability placement, it meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports automated SMT assembly, and maintains thermal resistance of 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads - enabling sustained 6.5 W power dissipation at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping behavior |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤37.5 V at 40 A - clamping voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability per industry-standard waveform (duty cycle 0.01 %) |
| IPPM | 40 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with cathode band marking and 0.320" body length |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, footprint compatible with JEDEC DO-214AB standard mounting pad layout (8.0 mm × 8.0 mm copper per terminal).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; grounded reference in unidirectional TVS configuration | Connected to protected line's low-side or ground return path to enable shunt clamping |
| Cathode | Current exit point during reverse avalanche; high-voltage input node | Connected to the line being protected (e.g., CAN_H, 24 V rail); marked with band on package |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 24 V systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving clamping precision for sensitive 3.3 V/5 V logic |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1 µA) across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
| AEC-Q101 qualification option | HE3/HM3 variants support automotive-grade reliability requirements (e.g., engine control, ADAS sensors) |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting analog/digital sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor signal line and chassis ground to clamp transients before reaching ADC or microcontroller input. Use Value: Limits induced voltage to ≤37.5 V during 40 A surge, preventing latch-up or damage to 5 V tolerant interface circuitry. |
Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers against field-wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Primary front-end surge suppressor mounted directly at connector entry point, preceding optocoupler or Schmitt trigger. Use Value: Absorbs 1500 W surge energy without degradation, maintaining <1 µA leakage at 23.1 V to avoid false triggering. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
Use Scenario: Guarding 48 V PoE-powered Ethernet switch ports against lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Secondary-level TVS on DC supply rail downstream of primary GDT or MOV, providing fast-response clamping. Use Value: Responds in <1 ps to limit voltage rise, achieving clamping within 100 ns - critical for protecting IEEE 802.3af/at PD controllers. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to 120/230 V AC mains. IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals or H-bridge freewheeling path to absorb inductive energy. Use Value: Handles 200 A non-repetitive forward surge (IFSM), surviving repeated motor start-stop cycles without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A-E3/52T (Vishay) | Same VBR/VWM/VC, but SMB package (lower PPPM = 600 W, IPPM = 17.1 A) | Lower surge capacity suits cost-sensitive consumer electronics, not automotive or industrial 1500 W requirements | Select 1.5SMC27A-E3/9AT when full 1500 W rating and DO-214AB mechanical robustness are mandatory. |
| 1.5KE27A (ON Semiconductor) | Through-hole DO-201 package; identical electrical specs but higher RθJA (100 °C/W vs. 75 °C/W) and no MSL Level 1 rating | Requires wave soldering; unsuitable for mixed-technology or high-density SMT boards | Choose 1.5SMC27A-E3/9AT for automated SMT production, RoHS compliance, and superior thermal performance in compact layouts. |
Compared with SMBJ27A-E3/52T and 1.5KE27A, the 1.5SMC27A-E3/9AT uniquely combines 1500 W surge rating, SMC package ruggedness, MSL Level 1 reflow compatibility, and commercial-grade RoHS compliance - making it optimal for high-volume, thermally constrained, and automotive-adjacent designs.
Availability
1.5SMC27A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and telecom power rail safeguarding requiring stable component supply and consistent lot-to-lot clamping performance.
Supply support for 1.5SMC27A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where robustness, repeatable clamping, and SMT manufacturability are essential.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC27A-E3/9AT?
The 1.5SMC27A-E3/9AT has a specified breakdown voltage range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 24 V system interfaces without premature conduction.
Is the 1.5SMC27A-E3/9AT suitable for bidirectional transient protection?
No, the 1.5SMC27A-E3/9AT is a unidirectional TVS diode - its cathode band marking and electrical characteristics (e.g., forward surge rating IFSM = 200 A) confirm asymmetric operation. For bidirectional protection, use the 1.5SMC27CA variant, which exhibits matched clamping in both polarities and lacks polarity marking.
What does the "-E3/9AT" suffix indicate in 1.5SMC27A-E3/9AT?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "/9AT" specifies packaging in 13-inch diameter tape-and-reel format containing 3500 units. This configuration supports high-speed pick-and-place assembly and aligns with IPC-7351B land pattern recommendations for DO-214AB footprints.
How does the 1.5SMC27A-E3/9AT perform under elevated ambient temperatures?
The 1.5SMC27A-E3/9AT derates linearly above 25 °C ambient: its peak pulse power drops to ~1125 W at 75 °C and ~750 W at 125 °C (per Fig. 2). Its 150 °C max junction temperature and 75 °C/W thermal resistance allow reliable operation in under-hood automotive zones when mounted on adequate copper area.
Does the 1.5SMC27A-E3/9AT meet automotive qualification standards?
The base 1.5SMC27A-E3/9AT is commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes like 1.5SMC27AHE3_A/I (with "HE3" suffix). These variants undergo extended stress testing for automotive use, while the -E3/9AT remains ideal for industrial and telecom applications requiring high surge immunity without formal automotive certification.
1.5SMC27A-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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC27A-E3/9AT FAQ
1.How can I place an order for 1.5SMC27A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27A-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 1.5SMC27A-E3/9AT reliable?
The price and inventory of 1.5SMC27A-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 1.5SMC27A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC27A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27A-E3/9AT?
1.5SMC27A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27A-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 1.5SMC27A-E3/9AT?
For technical support, including 1.5SMC27A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC27A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27A-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 1.5SMC27A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC27A-E3/9AT?
All 1.5SMC27A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27A-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 1.5SMC27A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC27A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27A-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 …
