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Vishay General Semiconductor - Diodes Division 1.5SMC27CAHM3/H
- Part No.:
- 1.5SMC27CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CAHM3/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,343
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Product details
Overview
1.5SMC27CAHM3/H from Vishay General Semiconductor is a bidirectional 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 min/max = 25.7–28.4 V at 1.0 mA), 23.1 V stand-off voltage (VWM), clamps to ≤37.5 V at 40.0 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is used in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC27CAHM3/H datasheet, 1.5SMC27CAHM3/H pinout, 1.5SMC27CAHM3/H application, or 1.5SMC27CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, low incremental surge resistance, and compliance with UL 497B for telecom protectors.
Technical Context
This device operates as a voltage-clamped crowbar during transient events, leveraging an avalanche breakdown mechanism to divert surge energy away from downstream circuitry. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Designed for high-reliability environments, the 1.5SMC27CAHM3/H meets AEC-Q101 stress test requirements and is halogen-free, RoHS-compliant (HM3 suffix), with MSL Level 1 rating and 260 °C lead-free reflow compatibility. It exhibits low thermal resistance (RθJL = 15 °C/W) and stable temperature coefficient of VBR (0.096 %/°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines precise avalanche initiation threshold for reliable, repeatable clamping onset |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring no interference during normal operation |
| VC @ IPPM | ≤37.5 V at 40.0 A (10/1000 µs) - actual clamped voltage seen by protected circuit under worst-case surge |
| PPPM | 1500 W - peak transient power handling capacity, enabling protection against lightning-induced surges per IEC 61000-4-5 |
| IPPM | 40.0 A - maximum non-repetitive surge current the device can safely clamp without degradation |
| Junction Temp Range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal management |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Bidirectional construction means no polarity marking; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One terminal of the symmetrical avalanche junction; accepts surge current regardless of polarity |
| Cathode | Transient current entry (either direction) | Second terminal of the symmetrical avalanche junction; completes low-impedance path to ground or return during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per JEDEC standards |
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded systems without polarity concerns |
| 1500 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity when properly laid out with recommended 8.0 mm × 8.0 mm pads |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and JESD201 Class 2 whisker resistance for long-term interconnect integrity |
| Low clamping ratio (VC/VBR) | 1.46 typical (37.5 V / 25.7 V) - minimizes let-through voltage stress on protected ICs such as CAN transceivers or microcontrollers |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal/power pins to clamp fast-rising transients (<1 ns rise time) before they reach the sensor signal conditioning IC. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V analog front-ends and communication transceivers while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring surges, ground loop spikes, and electrostatic discharge in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, located upstream of optocoupler or Schmitt-trigger input stages. Use Value: Enables >100,000 surge cycles without parameter drift, reducing field failure rates and eliminating need for fuse replacement after transient events. |
| Telecom Line Interface | Power Supply Input Stage |
|
Use Scenario: Secondary protection on POTS or xDSL line cards, downstream of gas discharge tube (GDT) primary protectors in central office and CPE equipment. IC Role / Device Role / Timing Role: Fast-response secondary clamp limiting let-through voltage to <40 V during combined lightning/GDT follow-on current events. Use Value: Meets UL 497B requirements for telecom protectors and ensures downstream SLIC and codec ICs remain within absolute maximum ratings. |
Use Scenario: Input-stage surge suppression on 24 V or 48 V DC power rails feeding industrial controllers, where bulk capacitance alone cannot absorb fast transients. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting surge energy directly to chassis ground, coordinated with upstream π-filter and fuse. Use Value: Limits peak rail voltage excursion to ≤37.5 V, preventing overvoltage shutdown or gate oxide damage in DC-DC controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Same VBR range (25.7–28.4 V), but lower PPPM = 600 W and smaller SMB (DO-214AA) package | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump or telecom primary protection | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE27CA | Through-hole TO-204AE (DO-15) package, identical electrical specs, higher RθJA (100 °C/W) | Requires wave soldering or hand assembly; not compatible with automated SMT lines or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27CA and 1.5KE27CA, the 1.5SMC27CAHM3/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC's optimized thermal pad layout-making it the preferred choice for production automotive and industrial SMT applications demanding validated reliability and high-power clamping.
Availability
1.5SMC27CAHM3/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom infrastructure projects requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC27CAHM3/H 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 performance.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What does the "HM3" suffix indicate in 1.5SMC27CAHM3/H?
The HM3 suffix in 1.5SMC27CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. It confirms the device meets automotive-grade reliability standards and environmental compliance requirements for modern electronics manufacturing.
Is 1.5SMC27CAHM3/H suitable for protecting CAN FD bus lines?
Yes, 1.5SMC27CAHM3/H is suitable for CAN FD bus protection due to its bidirectional clamping, low clamping voltage (≤37.5 V), and fast response time. Its VWM of 23.1 V allows safe operation above the CAN FD common-mode range (±12 V) while clamping transients before they damage the transceiver.
How does the 1.5SMC27CAHM3/H compare to unidirectional variants like 1.5SMC27AHM3/H?
The 1.5SMC27CAHM3/H is bidirectional, enabling protection of AC-coupled or floating signal paths without polarity concerns, whereas 1.5SMC27AHM3/H is unidirectional and requires correct cathode orientation. Both share identical VBR, VC, and PPPM, but only the CA version supports symmetric surge suppression.
What PCB layout practices maximize surge performance of 1.5SMC27CAHM3/H?
To maximize surge performance, mount 1.5SMC27CAHM3/H using the recommended 8.0 mm × 8.0 mm copper pads per terminal, minimize trace length between the device and protected node, and connect directly to solid ground/power planes. Avoid vias in the main current path and ensure thermal relief is omitted from pads.
Does 1.5SMC27CAHM3/H require derating at elevated ambient temperatures?
Yes, 1.5SMC27CAHM3/H requires derating above 25 °C ambient. Per Figure 2 in the datasheet, its peak pulse power decreases linearly: at 85 °C TA, PPPM is reduced to ~850 W. Designers must apply this derating when sizing for sustained high-temperature environments like engine compartments.
1.5SMC27CAHM3/H 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/H FAQ
1.How can I place an order for 1.5SMC27CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CAHM3/H 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/H reliable?
The price and inventory of 1.5SMC27CAHM3/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CAHM3/H?
1.5SMC27CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CAHM3/H 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/H?
For technical support, including 1.5SMC27CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC27CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CAHM3/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CAHM3/H?
All 1.5SMC27CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CAHM3/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC27CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CAHM3/H Tags
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