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Vishay General Semiconductor - Diodes Division 1.5SMC27AHM3_A/I
- Part No.:
- 1.5SMC27AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AHM3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
1.5SMC27AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), 37.5 V clamping voltage (VC) at 40 A peak pulse current, and 1500 W peak pulse power with 10/1000 μs waveform - deployed for overvoltage protection of MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the 1.5SMC27AHM3_A/I datasheet, 1.5SMC27AHM3_A/I pinout, 1.5SMC27AHM3_A/I application, or 1.5SMC27AHM3_A/I equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under lightning and inductive-switching transients - critical for automotive ECUs, motor control boards, and industrial I/O modules.
Technical Context
The 1.5SMC27AHM3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated silicon junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR range (25.7–28.4 V) and guaranteed VC ≤ 37.5 V at IPPM = 40 A, ensuring predictable voltage limiting during transient events.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C when mounted on 8.0 mm × 8.0 mm copper pads. The device supports repetitive 0.01% duty cycle pulses and meets UL 497B recognition (QVGQ2) for surge protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at IT = 1 mA - defines precise avalanche initiation threshold for repeatable transient suppression |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 37.5 V at 40 A (10/1000 μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power handling capacity without failure under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault conditions |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; enables unidirectional clamping to ground |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to higher-potential side (e.g., VCC rail or signal line); defines clamping reference point |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 and JESD201 Class 2 whisker resistance requirements for long-term solder joint integrity |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without baking or special handling |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus transceivers and microcontroller GPIOs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp referenced to ground, absorbing negative-going spikes on supply rails and positive-going surges on signal lines. Use Value: Limits transient voltage to ≤37.5 V during 40 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Safeguarding analog input channels (e.g., current sense, temperature feedback) in variable-frequency drives exposed to inductive kickback. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed across sensor inputs and ADC front-end, shunting energy before propagation into precision circuitry. Use Value: Sub-1 ns response ensures clamping activation prior to ADC sampling window, preserving measurement fidelity under 10/1000 μs surges. |
| Telecom Power Supply Input Stage | Consumer Appliance Mainboard Surge Protection |
Use Scenario: Secondary-side DC input protection for PoE-powered equipment subjected to lightning-induced surges on 48 V distribution lines. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 23.1 V) used in series with upstream fuse and parallel to bulk capacitor to absorb residual transients post-filtering. Use Value: 1500 W rating handles multiple IEC 61000-4-5 surges without derating, supporting >10-year field life in outdoor telecom cabinets. |
Use Scenario: Overvoltage protection for microcontroller reset lines and communication buses (UART, I²C) in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at VWM) unidirectional suppressor tied between signal line and ground, minimizing standby current impact. Use Value: Halogen-free construction and AEC-Q101 qualification ensure compliance with global appliance safety standards (IEC 60335) and extended thermal cycling durability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A-E3/52 | Same VBR range (25.7–28.4 V) but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when board space is constrained and surge threat level is ≤ Level 2 (1 kV) |
| 1.5KE27A | Through-hole TO-204AA (DO-41) package; identical electrical specs but higher RθJA (100 °C/W) | Requires wave soldering; not compatible with automated SMT assembly or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27A-E3/52 and 1.5KE27A, the 1.5SMC27AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free compliance, 1500 W surge capability, and SMC package - making it the only option meeting full automotive production requirements for surface-mount transient suppression at 27 V standoff.
Availability
1.5SMC27AHM3_A/I is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive I/O protection, and telecom power supply input stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC27AHM3_A/I 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, efficiency, and application-specific optimization.
The 1.5SMC Series was designed specifically for high-power, surface-mount transient voltage suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching is mandatory.
FAQ
What is the clamping voltage of the 1.5SMC27AHM3_A/I under a 10/1000 μs surge?
The 1.5SMC27AHM3_A/I has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88303, Rev. 09-Mar-2026) and represents the upper limit of voltage imposed on the protected circuit during standardized surge testing - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC27AHM3_A/I suitable for automotive applications?
Yes, the 1.5SMC27AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and mechanical shock - making it approved for use in automotive engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal and vibration stress is essential.
What does the "HM3_A/I" suffix mean in 1.5SMC27AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance; "A" indicates AEC-Q101 qualification; and "I" specifies packaging in 13-inch tape-and-reel format (3500 units per reel). This full suffix confirms the 1.5SMC27AHM3_A/I meets automotive-grade material, reliability, and logistics requirements - distinct from commercial-grade M3 or E3 variants.
How does the 1.5SMC27AHM3_A/I compare to bidirectional TVS diodes?
The 1.5SMC27AHM3_A/I is unidirectional and must be oriented with cathode toward the protected line's higher potential - unlike bidirectional types (e.g., 1.5SMC27CA) that protect both polarities symmetrically. Its VWM = 23.1 V applies only in reverse bias; forward conduction begins at ~0.7 V. This makes the 1.5SMC27AHM3_A/I ideal for DC rail or signal-line-to-ground protection where polarity is fixed and leakage must be minimized.
What is the thermal resistance of the 1.5SMC27AHM3_A/I, and how does it affect layout?
The 1.5SMC27AHM3_A/I has RθJA = 75 °C/W and RθJL = 15 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under 1500 W surges, PCB layout must provide adequate copper area and thermal vias - undersized pads cause excessive junction heating and premature failure. Vishay specifies this pad layout in Document 88303, Figure "Mounting Pad Layout".
1.5SMC27AHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC27AHM3_A/I FAQ
1.How can I place an order for 1.5SMC27AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AHM3_A/I 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 1.5SMC27AHM3_A/I reliable?
The price and inventory of 1.5SMC27AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AHM3_A/I?
1.5SMC27AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AHM3_A/I 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 1.5SMC27AHM3_A/I?
For technical support, including 1.5SMC27AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC27AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AHM3_A/I 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 1.5SMC27AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AHM3_A/I?
All 1.5SMC27AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AHM3_A/I, 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 1.5SMC27AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC27AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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