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Vishay General Semiconductor - Diodes Division 1.5SMC27CAHM3_A/I
- Part No.:
- 1.5SMC27CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CAHM3_A/I.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,053
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Product details
Overview
1.5SMC27CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal and power lines. It features 27 V breakdown voltage (VBR min/max = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), 37.5 V maximum clamping voltage (VC) at 40 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to protect automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the 1.5SMC27CAHM3_A/I datasheet, 1.5SMC27CAHM3_A/I pinout, 1.5SMC27CAHM3_A/I application, or 1.5SMC27CAHM3_A/I equivalent, key selection considerations include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
The 1.5SMC27CAHM3_A/I delivers 1500 W peak pulse power handling under standardized 10/1000 µs surge conditions, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), allowing reliable operation up to 150 °C junction temperature in properly heatsinked layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche onset threshold for bidirectional clamping |
| VWM | 23.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 37.5 V at 40 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient power dissipation capability under standardized surge waveform |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and polarity-unmarked terminals for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node in bidirectional clamping | Connected to protected line; symmetric with cathode for AC transient suppression |
| Cathode | Current exit terminal in forward bias; common node in bidirectional clamping | Connected to protected line; symmetric with anode - no marking distinguishes polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power rails |
| 1500 W peak pulse power | Withstands high-energy lightning-induced surges per IEC 61000-4-5 (Level 4) when mounted on 8 mm × 8 mm pads |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-20 MSL Level 1 and JESD201 Class 2 whisker resistance requirements |
| Low clamping ratio (VC/VBR) | 1.47 - tight voltage margin between clamping and breakdown improves system-level ESD/surge immunity |
Applications
| Automotive Sensor Interface Protection | Industrial RS-485 Transceiver Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay or chassis modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair (e.g., CAN FD or LIN bus) to clamp ±30 kV ESD and 100 V/10 ms transients. Use Value: Prevents latch-up or gate oxide damage in sensor signal conditioning ICs by limiting voltage to ≤37.5 V during 40 A surge events. |
Use Scenario: Safeguarding half-duplex RS-485 transceivers in factory automation PLCs subjected to ground loop surges and cable discharge events. IC Role / Device Role / Timing Role: Placed across A/B differential lines to suppress common-mode transients without distorting data integrity at 250 kbps–20 Mbps. Use Value: Maintains signal eye diagram integrity by clamping transients within 1 ns, avoiding bit errors caused by overshoot exceeding receiver thresholds. |
| Consumer USB-C Port ESD Protection | Telecom DSL Line Surge Protection |
Use Scenario: Secondary-level ESD protection on USB-C CC and VCONN lines in portable docking stations where primary TVS is upstream. IC Role / Device Role / Timing Role: Bidirectional clamp absorbing ±15 kV contact discharge (IEC 61000-4-2) before reaching USB PD controller or level shifters. Use Value: Reduces failure rate in field deployments by limiting peak voltage to 37.5 V, well below 40 V absolute maximum ratings of USB-C PHY ICs. |
Use Scenario: Front-end surge protection on POTS/DSL line cards in central office equipment facing induced lightning surges on twisted-pair copper loops. IC Role / Device Role / Timing Role: Mounted across tip/ring lines to shunt 10/1000 µs surges up to 1500 W before reaching SLIC or codec ICs. Use Value: Enables compliance with GR-1089-CORE Level 3 (10 kA) when used with series impedance, extending product lifecycle in harsh telecom environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Lower peak power (600 W), smaller SMB package (DO-214AA), VC = 42.1 V @ 14.3 A | Suitable for space-constrained consumer electronics but not automotive under-hood surge levels | Select when board area is critical and surge energy is ≤600 W; verify thermal derating for ambient >85 °C |
| 1.5KE27CA | Through-hole TO-204AE (DO-15) package, same VBR/VC, higher RθJA (100 °C/W) | Used in legacy industrial power supplies where manual assembly or high-reliability through-hole mounting is required | Choose only if SMT is unavailable; requires larger PCB real estate and cannot support automated high-volume production |
Compared with SMBJ26CA and 1.5KE27CA, the 1.5SMC27CAHM3_A/I offers superior surge robustness (1500 W vs. 600 W/1500 W), AEC-Q101 qualification for automotive, and optimized SMC thermal performance - making it the preferred choice for new designs requiring high-reliability surface-mount transient suppression.
Availability
1.5SMC27CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial communication interfaces, consumer USB-C accessories, and telecom line card designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5SMC27CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability and automotive-grade solutions.
The 1.5SMC Series was developed specifically for high-power transient suppression in automotive, industrial, and telecom applications - delivering consistent clamping performance, AEC-Q101 validation, and robust SMT manufacturability in the SMC package.
FAQ
What is the clamping voltage of the 1.5SMC27CAHM3_A/I under a 10/1000 µs surge?
The 1.5SMC27CAHM3_A/I has a maximum clamping voltage (VC) of 37.5 V at 40 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per JEDEC standards, ensuring repeatable surge performance in production layouts.
Is the 1.5SMC27CAHM3_A/I suitable for automotive applications?
Yes, the 1.5SMC27CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It is explicitly rated for under-hood and chassis-mounted systems operating from −65 °C to +150 °C junction temperature.
How does the bidirectional configuration of the 1.5SMC27CAHM3_A/I affect its circuit placement?
The 1.5SMC27CAHM3_A/I has no polarity marking and functions identically in both directions, allowing direct placement across differential signal pairs (e.g., RS-485 A/B), AC power rails, or ungrounded sensor outputs without orientation concerns - simplifying layout and eliminating risk of reverse installation.
What is the thermal resistance of the 1.5SMC27CAHM3_A/I, and how does it impact PCB layout?
The 1.5SMC27CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. To achieve rated 1500 W surge capability, the datasheet specifies mounting on minimum 8.0 mm × 8.0 mm copper pads - undersized pads will cause thermal derating and reduced surge endurance.
Does the 1.5SMC27CAHM3_A/I meet any specific industry surge immunity standards?
The 1.5SMC27CAHM3_A/I supports compliance with IEC 61000-4-2 (ESD ±30 kV air/±15 kV contact), IEC 61000-4-4 (EFT 40 A), and IEC 61000-4-5 (surge Level 4: 4 kV line-earth, 2 kV line-line) when applied with appropriate series impedance and PCB layout per Vishay Application Note AN87.
1.5SMC27CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for 1.5SMC27CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CAHM3_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 1.5SMC27CAHM3_A/I reliable?
The price and inventory of 1.5SMC27CAHM3_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 1.5SMC27CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CAHM3_A/I?
1.5SMC27CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CAHM3_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 1.5SMC27CAHM3_A/I?
For technical support, including 1.5SMC27CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CAHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC27CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CAHM3_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 1.5SMC27CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CAHM3_A/I?
All 1.5SMC27CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CAHM3_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 1.5SMC27CAHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC27CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CAHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Diodes Incorporated
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