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Vishay General Semiconductor - Diodes Division 1.5SMC27CAHM3/I
- Part No.:
- 1.5SMC27CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CAHM3/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,192
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Product details
Overview
1.5SMC27CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 23.1 V standoff voltage (VWM), 25.7–28.4 V breakdown voltage (VBR) at 1 mA, 37.5 V 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 signal lines, industrial I/O ports, and telecom interface protection.
For engineers reviewing the 1.5SMC27CAHM3/I datasheet, 1.5SMC27CAHM3/I pinout, 1.5SMC27CAHM3/I application, or 1.5SMC27CAHM3/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for bidirectional transient suppression where low clamping ratio, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
The 1.5SMC27CAHM3/I operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±23.1 V in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the SMC package provides thermal resistance of 75 °C/W (junction-to-ambient) and supports 200 A non-repetitive forward surge (unidirectional mode only).
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform with 0.01% duty cycle, and its clamping performance is validated at TA = 25 °C on 8.0 mm × 8.0 mm copper pads per terminal. The device meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 23.1 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR min/max | 25.7 V / 28.4 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on across temperature and lot variation |
| VC @ IPPM | 37.5 V at 40 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level |
| PPPM | 1500 W - peak transient energy handling capacity; enables robust protection against lightning-induced surges and inductive switching spikes |
| IPPM | 40 A - maximum non-repetitive peak pulse current; defines surge current capability under standard waveform |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments |
| 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 placement |
Pinout & Package
SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, no polarity marking for bidirectional operation. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction required in PCB layout |
| Terminal 2 | Anode / Cathode (bidirectional) | Complementary terminal to Terminal 1; forms symmetrical clamping path for ± transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern industrial and automotive electronics manufacturing |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-related delamination or popcorning |
| 1500 W peak pulse power | Provides higher surge immunity than standard 600 W TVS devices, reducing need for cascaded protection stages |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp transients before reaching signal conditioning ICs. Use Value: Clamps 37.5 V at 40 A, limiting stress on downstream 3.3 V/5 V signal chains and meeting ISO 7637-2 Pulse 1/2/5a requirements. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or optocoupler input channels exposed to long cable runs. Use Value: Withstands 1500 W surges and maintains <1 µA leakage at 23.1 V, ensuring minimal impact on input threshold detection accuracy. |
| Telecom Line Interface Protection | Consumer Appliance Motor Control Feedback |
Use Scenario: Shielding RS-485/RS-232 transceivers in base stations and network equipment from lightning-induced common-mode surges on twisted-pair lines. IC Role / Device Role / Timing Role: Bidirectional TVS mounted differential across line pairs to suppress ± transients without disrupting DC bias. Use Value: Symmetric 25.7–28.4 V breakdown ensures balanced clamping, preserving signal integrity in full-duplex communication links. |
Use Scenario: Protecting hall-effect sensor outputs and encoder feedback lines in washing machine or HVAC motor drives from commutation noise. IC Role / Device Role / Timing Role: Localized TVS at sensor connector to absorb fast-rising edge transients generated by brushless motor switching. Use Value: Sub-nanosecond response time and 37.5 V clamping prevent false triggering of position sensing circuits during PWM operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Lower peak power (400 W), smaller SMA package (DO-214AC), 24 V VWM, 38.9 V VC at 10.3 A | Targeted for space-constrained consumer electronics; insufficient for 1500 W surge environments | Select when board area is critical and surge threat level is ≤400 W (e.g., USB port protection) |
| 1.5KE27CA | Through-hole TO-204AA (DO-41) package, same 23.1 V VWM and 37.5 V VC, but lower thermal performance (RθJA ≈ 100 °C/W) | Used in legacy designs or prototyping where manual assembly or socketing is preferred | Choose only if SMT is not feasible; requires larger PCB real estate and lacks MSL Level 1 reflow support |
Compared with SMAJ24CA and 1.5KE27CA, the 1.5SMC27CAHM3/I uniquely combines AEC-Q101 qualification, halogen-free construction, SMC package thermal efficiency (RθJA = 75 °C/W), and 1500 W surge rating - making it the optimal choice for production-grade automotive and industrial surface-mount systems requiring long-term reliability and regulatory compliance.
Availability
1.5SMC27CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control applications requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5SMC27CAHM3/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 was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge capability, and AEC-Q101 validation are mandatory.
FAQ
What does the "HM3" suffix mean in 1.5SMC27CAHM3/I?
The "HM3" suffix in 1.5SMC27CAHM3/I indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" denotes the halogen-free material set, "M3" confirms RoHS compliance and JESD201 Class 2 whisker resistance, and the "I" specifies 3500-unit tape-and-reel packaging on 13-inch reels - distinguishing it from "H" (850-unit) variants.
Is 1.5SMC27CAHM3/I unidirectional or bidirectional?
The 1.5SMC27CAHM3/I is a bidirectional TVS diode, as confirmed by the "CA" suffix in its part number. It provides symmetrical clamping for both positive and negative transients without polarity marking on the SMC package - ideal for protecting AC-coupled or floating signal paths where voltage polarity is undefined.
What is the clamping voltage of 1.5SMC27CAHM3/I at rated surge current?
The 1.5SMC27CAHM3/I has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events.
Does 1.5SMC27CAHM3/I meet automotive reliability standards?
Yes, the 1.5SMC27CAHM3/I is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature operating life, and mechanical shock - specifically validated for use in automotive electronic control units, sensor modules, and infotainment systems where long-term reliability under thermal and vibration stress is essential.
What is the thermal resistance of 1.5SMC27CAHM3/I?
The 1.5SMC27CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout (0.31" × 0.31" copper pads). Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting effective heat dissipation in high-density SMT layouts without additional heatsinking.
1.5SMC27CAHM3/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:
- -
- 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:
- 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)
1.5SMC27CAHM3/I FAQ
1.How can I place an order for 1.5SMC27CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CAHM3/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 1.5SMC27CAHM3/I reliable?
The price and inventory of 1.5SMC27CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC27CAHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CAHM3/I?
1.5SMC27CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CAHM3/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 1.5SMC27CAHM3/I?
For technical support, including 1.5SMC27CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CAHM3/I requirements.
6.How does Aetrix verify that 1.5SMC27CAHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CAHM3/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 1.5SMC27CAHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CAHM3/I?
All 1.5SMC27CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CAHM3/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 1.5SMC27CAHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC27CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CAHM3/I Tags
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