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Vishay General Semiconductor - Diodes Division 1.5SMC27CAHM3_A/H
- Part No.:
- 1.5SMC27CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27CAHM3_A/H.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,583
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Product details
Overview
1.5SMC27CAHM3_A/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 AEC-Q101 qualified, halogen-free, RoHS-compliant, and used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC27CAHM3_A/H datasheet, 1.5SMC27CAHM3_A/H pinout, 1.5SMC27CAHM3_A/H application, or 1.5SMC27CAHM3_A/H equivalent, this device serves as a high-reliability, bidirectional TVS for transient suppression in automotive-grade designs where clamping voltage, surge current handling, and MSL-1 solderability are critical selection criteria.
Technical Context
The 1.5SMC27CAHM3_A/H operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while its SMC (DO-214AB) package supports automated placement and meets J-STD-020 MSL Level 1 with 260 °C peak reflow.
It is rated for 1500 W peak pulse power (10/1000 µs waveform), derates linearly above 25 °C ambient per Fig. 2, and exhibits a typical thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads). The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) only in unidirectional variants - not applicable here due to bidirectional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1.0 mA - defines reliable avalanche initiation threshold in both directions |
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤37.5 V at 40.0 A - clamping voltage under 1500 W transient stress; determines protected circuit's max overvoltage exposure |
| PPPM | 1500 W - peak pulse power handling capability with 10/1000 µs waveform; validates surge immunity per IEC 61000-4-5 |
| TJ range | −65 °C to +150 °C - enables operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance |
| AEC-Q101 | Qualified - certified for automotive electronic systems requiring reliability validation per stress test standard |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | One end of the back-to-back PN junction structure; electrically interchangeable with cathode for transient clamping |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional mode | Second end of the dual-junction configuration; no band marking distinguishes terminals in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV) surge testing when properly laid out with 8 mm² copper pads |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS sensor modules |
| Halogen-free & RoHS-compliant | Fulfills EU ELV and automotive OEM material compliance requirements (Vishay HM3 suffix) |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting LIN/CAN physical layer 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 across differential bus lines or supply rails to clamp transients before they reach sensitive IC pins. Use Value: Limits induced surges to ≤37.5 V, preventing latch-up or permanent damage to 5 V or 3.3 V transceivers while maintaining signal integrity. |
Use Scenario: Safeguarding RS-485/CAN FD transceivers in factory automation PLCs exposed to motor switching noise and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) bidirectional clamp on data lines to suppress fast transients without distorting 1+ Mbps signals. Use Value: Maintains signal rise/fall times due to minimal junction capacitance and achieves sub-1 ns response, preserving communication timing margins. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Card Surge Protection |
Use Scenario: Secondary-side DC output protection in wall adapters and USB PD chargers against reverse-polarity misconnection and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional shunt device across regulated 5–24 V outputs to absorb energy from accidental short-circuit recovery or hot-plug events. Use Value: Clamps voltage excursions within safe limits for downstream USB controllers and PMICs, avoiding brownout resets or overvoltage shutdown. |
Use Scenario: Primary protection for ADSL/VDSL line interface ICs in central office and CPE equipment subjected to telecom-grade lightning surges (ITU-T K.20/21). IC Role / Device Role / Timing Role: First-stage coarse clamp on twisted-pair telephone lines, coordinated with GDTs and PTCs in multi-stage protection networks. Use Value: Handles 40 A peak pulses without degradation, enabling system-level compliance with GR-1089-CORE and Telcordia requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27CA | Same VBR/VC specs but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive under-hood locations with high ambient | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE27CA | Through-hole TO-204AA (DO-41); identical electrical specs but larger size, higher inductance, and no AEC-Q101 qualification | Not suitable for automated SMT lines; lacks automotive reliability validation and MSL-1 rating | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27CA and 1.5KE27CA, the 1.5SMC27CAHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, SMC surface-mount compatibility, and halogen-free construction - making it the only option qualified for volume production in automotive and industrial SMT environments demanding full compliance traceability.
Availability
1.5SMC27CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial fieldbus protection, and telecom line card development requiring stable component supply, full AEC-Q101 documentation, and halogen-free compliance.
Supply support for 1.5SMC27CAHM3_A/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, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatability, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC27CAHM3_A/H under maximum surge conditions?
The 1.5SMC27CAHM3_A/H clamps to a maximum of 37.5 V when subjected to its rated 40.0 A peak pulse current (10/1000 µs waveform). This value is measured per standard test conditions in the Vishay datasheet (Document Number 88303, page 2) and represents the upper limit of voltage seen by downstream circuitry during a full 1500 W transient event.
Is the 1.5SMC27CAHM3_A/H suitable for automotive applications?
Yes, the 1.5SMC27CAHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly intended for use in automotive sensor interfaces, body control modules, and infotainment systems where transient immunity and long-term reliability under temperature cycling are required.
Does the 1.5SMC27CAHM3_A/H have polarity markings on the package?
No, the 1.5SMC27CAHM3_A/H is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its internal structure consists of two opposing avalanche junctions, making both terminals functionally identical - essential for protecting AC-coupled or floating signal paths without orientation constraints.
What is the maximum operating temperature for the 1.5SMC27CAHM3_A/H?
The 1.5SMC27CAHM3_A/H has a specified junction and storage temperature range of −65 °C to +150 °C. This allows reliable operation in under-hood automotive environments and industrial enclosures where ambient temperatures may exceed 125 °C, provided PCB layout meets the recommended 8.0 mm × 8.0 mm copper pad area per terminal.
How does the 1.5SMC27CAHM3_A/H differ from unidirectional variants like 1.5SMC27AHM3_A/H?
The 1.5SMC27CAHM3_A/H is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas 1.5SMC27AHM3_A/H is unidirectional, features a cathode band, and supports 200 A non-repetitive forward surge current - a capability absent in CA versions. Electrical parameters including VBR, VWM, and VC are otherwise matched for equivalent voltage ratings.
1.5SMC27CAHM3_A/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:
- 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/H FAQ
1.How can I place an order for 1.5SMC27CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27CAHM3_A/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_A/H reliable?
The price and inventory of 1.5SMC27CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC27CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27CAHM3_A/H?
1.5SMC27CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27CAHM3_A/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_A/H?
For technical support, including 1.5SMC27CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27CAHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC27CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC27CAHM3_A/H?
All 1.5SMC27CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC27CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27CAHM3_A/H Tags
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