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Vishay General Semiconductor - Diodes Division 1.5SMC27AHM3/I
- Part No.:
- 1.5SMC27AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27AHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,175
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Product details
Overview
1.5SMC27AHM3/I 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 1.5SMC27AHM3/I datasheet, 1.5SMC27AHM3/I pinout, 1.5SMC27AHM3/I application, or 1.5SMC27AHM3/I equivalent, this page provides verified electrical parameters, SMC (DO-214AB) package details, AEC-Q101 qualification status, clamping performance under surge conditions, and direct alternative part comparisons for ESD and lightning transient suppression design.
Technical Context
The 1.5SMC27AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient events such as inductive switching spikes and lightning-induced surges. Its low incremental surge resistance ensures stable clamping during repetitive 10/1000 µs pulses at 0.01% duty cycle.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports automotive-grade reliability via AEC-Q101 qualification - confirmed by HM3 suffix and Vishay's documentation.
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 predictable turn-on during overvoltage events |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets safe DC bias margin |
| VC @ IPPM | ≤37.5 V at 40 A - clamping voltage under 1500 W 10/1000 µs surge; determines protected circuit's peak stress level |
| PPPM | 1500 W - peak pulse power handling capability; enables protection against high-energy transients like ISO 7637-2 Pulse 5a |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine); supports temporary fault-current exposure without failure |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference | Connected to lower-potential side of protected line; defines directionality and grounding reference for clamping |
| Cathode | Avalanche conduction terminal / surge sink | Connected to higher-potential rail or ground return path; carries full transient current during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements |
| 1500 W peak pulse power | Withstands high-energy transients per ISO 7637-2 and IEC 61000-4-5 without degradation or thermal runaway |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under temperature cycling and humidity exposure |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume manufacturing and lead-free processes |
| Halogen-free & RoHS-compliant | Meets environmental compliance for global electronics production including EU and China RoHS directives |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp positive-going surges above VWM. Use Value: Limits voltage seen by downstream transceiver ICs to ≤37.5 V during 1500 W surges, preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding digital input/output terminals of programmable logic controllers against field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector interface to shunt transient energy before reaching isolation barriers or microcontroller GPIOs. Use Value: Maintains functional integrity under repeated 10/1000 µs surges up to 40 A while exhibiting <1 µA leakage at 23.1 V DC bias. |
| Telecom Power Line Protection | Consumer Device USB Port Protection |
Use Scenario: Shielding 24 V DC power feeds in VoIP phones and base stations from lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: Primary-level TVS on DC input rail, coordinated with upstream fuses and secondary-stage MOVs. Use Value: Fast <1 ns response captures initial surge edge; low clamping voltage preserves downstream DC-DC converter input stage. |
Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines and VBUS in smart home hubs and portable audio devices. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed between VBUS and ground to suppress hot-plug overshoot and ESD. Use Value: Withstands ±30 kV contact ESD (IEC 61000-4-2) while adding <0.5 pF parasitic capacitance - no signal integrity impact. |
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 ISO 7637-2 Pulse 5a or lightning-level surges | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 |
| 1.5KE27A | Through-hole DO-201 package; identical VBR, VWM, and VC, but higher RθJA (100 °C/W vs. 75 °C/W) | Requires larger PCB area and manual assembly; less suitable for automated high-volume production | 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/I uniquely combines AEC-Q101 qualification, 1500 W surge capacity in an SMT package, and halogen-free compliance - making it the preferred choice for automotive and industrial surface-mount systems requiring validated reliability and high-power transient immunity.
Availability
1.5SMC27AHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom power supply hardening requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for 1.5SMC27AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless SMT integration.
FAQ
What is the clamping voltage of the 1.5SMC27AHM3/I under maximum rated surge current?
The 1.5SMC27AHM3/I clamps to a maximum of 37.5 V when subjected to its rated peak pulse current of 40 A (10/1000 µs waveform). This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5SMC27AHM3/I maintains this clamping performance across its specified operating temperature range.
Is the 1.5SMC27AHM3/I AEC-Q101 qualified, and what does the 'HM3' suffix indicate?
Yes, the 1.5SMC27AHM3/I is AEC-Q101 qualified - confirmed by the 'HM3' suffix, where 'H' denotes AEC-Q101 qualification and 'M3' indicates halogen-free, RoHS-compliant construction. This qualification validates the 1.5SMC27AHM3/I for use in automotive applications including powertrain, body electronics, and ADAS subsystems per stress test requirements defined in the AEC standard.
What is the standoff voltage (VWM) of the 1.5SMC27AHM3/I, and why is it important for circuit design?
The 1.5SMC27AHM3/I has a maximum reverse standoff voltage (VWM) of 23.1 V, meaning it remains in high-impedance state with <1 µA leakage up to this DC or RMS voltage. This parameter ensures the 1.5SMC27AHM3/I does not interfere with normal circuit operation while providing margin below the 25.7–28.4 V breakdown threshold - critical for reliable protection of 24 V nominal systems without false triggering.
Does the 1.5SMC27AHM3/I have a bidirectional variant, and how does polarity affect its usage?
No, the 1.5SMC27AHM3/I is strictly unidirectional, as indicated by the 'A' suffix and cathode band marking. Bidirectional variants use the 'CA' suffix (e.g., 1.5SMC27CA). The unidirectional nature of the 1.5SMC27AHM3/I requires correct orientation: cathode to the higher-potential rail (e.g., VCC or signal line), anode to ground or lower potential - enabling clamping only for positive transients relative to that reference.
What is the thermal resistance and maximum junction temperature specification for the 1.5SMC27AHM3/I?
The 1.5SMC27AHM3/I 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, and a maximum junction temperature (TJ) of +150 °C. These values define its thermal derating behavior: at 25 °C ambient, it can dissipate up to 6.5 W continuously; above that, power must be reduced per the derating curve in Figure 2 of the Vishay datasheet for the 1.5SMC27AHM3/I.
1.5SMC27AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for 1.5SMC27AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27AHM3/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/I reliable?
The price and inventory of 1.5SMC27AHM3/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/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC27AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27AHM3/I?
1.5SMC27AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27AHM3/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/I?
For technical support, including 1.5SMC27AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC27AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27AHM3/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/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC27AHM3/I?
All 1.5SMC27AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27AHM3/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/I part is unused and in its original packaging.
Return procedure for 1.5SMC27AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27AHM3/I Tags
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