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Vishay General Semiconductor - Diodes Division 1.5SMC170CAHM3/H
- Part No.:
- 1.5SMC170CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC170CAHM3/H.pdf
- Description:
- TVS DIODE 145VWM 234VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,452
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Product details
Overview
1.5SMC170CAHM3/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 170 V standoff voltage (VWM), 190 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 μs), clamps to ≤234 V at 6.4 A, and operates across -65 °C to +150 °C - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC170CAHM3/H datasheet, 1.5SMC170CAHM3/H pinout, 1.5SMC170CAHM3/H application, or 1.5SMC170CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and compliance with UL 497B surge protector requirements.
Technical Context
This device is a glass-passivated, halogen-free, bidirectional TVS diode optimized for transient suppression in high-reliability environments. Its low incremental surge resistance and fast response time (<1 ns) enable effective clamping of lightning-induced surges and inductive switching spikes without degradation under repetitive 0.01% duty cycle conditions.
The 1.5SMC170CAHM3/H uses a symmetrical junction structure enabling identical electrical behavior in both polarities, with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting stable operation on standard 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 171 V - maximum continuous reverse voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR (Breakdown min) | 190 V at 1 mA - guaranteed minimum voltage at which avalanche conduction initiates; ensures predictable turn-on threshold. |
| VC (Clamping @ IPPM) | 234 V at 6.4 A - peak voltage seen by downstream components during 10/1000 μs surge; determines stress on protected ICs/MOSFETs. |
| PPPM | 1500 W - peak transient power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated placement. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 (260 °C reflow peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; symmetrical with cathode in bidirectional operation | No polarity marking required; terminals are functionally interchangeable for AC transients. |
| Cathode | Current exit point in forward bias; symmetrical with anode in bidirectional operation | Identical electrical behavior in both directions; no band marking on device body. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 6.4 A while limiting voltage to ≤234 V - sufficient for IEC 61000-4-5 Ed. 3 Class 4. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and infotainment power rails. |
| Glass passivated junction | Ensures long-term stability and low leakage (<1 μA at VWM) across temperature and humidity stress conditions. |
| Halogen-free & RoHS-compliant | Meets JESD201 Class 2 whisker resistance and environmental compliance requirements for global electronics manufacturing. |
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 ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to clamp transients before reaching signal conditioning ICs. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and precision op-amps during ISO 7637-2 Pulse 5a/b exposure. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers exposed to inductive kickback from solenoids and motor drives. IC Role / Device Role / Timing Role: Primary surge shunt located between field-side terminals and isolation barrier to limit voltage stress on optocouplers or digital isolators. Use Value: Maintains functional safety integrity by ensuring <100 ns response prevents >234 V from propagating into 24 V logic domains. |
| Telecom Line Interface | Power Supply Input Stage |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and DSL line drivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line defense in hybrid protection circuits combining gas discharge tubes (GDTs) and TVS arrays. Use Value: Clamps common-mode transients to <234 V within nanoseconds, reducing follow-on current burden on upstream GDTs. |
Use Scenario: Protecting DC-DC converter inputs and LDO regulators from surges originating from unregulated 12–48 V supply rails in factory automation equipment. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to absorb energy from fast-rising line disturbances. Use Value: Limits input voltage excursions to ≤234 V, preventing overvoltage shutdown or internal FET avalanche failure in switching regulators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170CA | Same VWM (171 V) and VC (234 V), but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4; preferred where board space is constrained | Select when surge energy is ≤600 W and thermal margin allows higher junction temperature rise. |
| 1.5KE170CA | Same electrical specs but axial DO-201AD package; higher mechanical robustness but incompatible with SMT assembly | Used in through-hole prototyping or legacy designs; not suitable for automated production or high-vibration environments | Choose only for manual assembly or repair scenarios where SMT infrastructure is unavailable. |
Compared with SMBJ170CA and 1.5KE170CA, the 1.5SMC170CAHM3/H delivers full 1500 W surge handling in an AEC-Q101-qualified SMT package - making it the optimal choice for volume automotive and industrial designs requiring both high energy absorption and production scalability.
Availability
1.5SMC170CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5SMC170CAHM3/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 optimization.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and telecom systems - engineered for AEC-Q101 compliance, low clamping voltage, and robust surge endurance in compact SMC packaging.
FAQ
What does the 'HM3' suffix indicate in 1.5SMC170CAHM3/H?
The 'HM3' suffix in 1.5SMC170CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JESD201 Class 2 whisker resistance, UL 497B recognition, and automotive-grade reliability testing - distinguishing it from commercial-grade 'M3' or non-automotive 'E3' variants.
Is 1.5SMC170CAHM3/H unidirectional or bidirectional?
The 1.5SMC170CAHM3/H is a bidirectional TVS diode, as confirmed by the 'CA' suffix and absence of cathode band marking. Its symmetrical breakdown behavior ensures identical clamping performance for positive and negative transients - ideal for protecting AC-coupled signals, differential buses, and floating power rails.
What is the maximum clamping voltage of 1.5SMC170CAHM3/H at rated surge current?
The 1.5SMC170CAHM3/H clamps to a maximum of 234 V at its rated peak pulse current of 6.4 A (10/1000 μs waveform). This value is guaranteed per Vishay's datasheet (Document Number 88303, page 2) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Does 1.5SMC170CAHM3/H meet automotive qualification standards?
Yes, 1.5SMC170CAHM3/H is AEC-Q101 qualified, as indicated by the 'HM3' suffix and documented in Vishay's 1.5SMC Series specification (Rev. 09-Mar-2026). It undergoes stress testing for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge - validating suitability for under-hood and chassis-mounted automotive applications.
What is the thermal resistance of 1.5SMC170CAHM3/H, and how does it affect layout?
The 1.5SMC170CAHM3/H 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. To maintain TJ ≤150 °C under 6.5 W steady-state dissipation, PCB layout must provide adequate copper area and avoid thermal bottlenecks - especially critical in high-ambient industrial enclosures.
1.5SMC170CAHM3/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):
- 145V
- Voltage - Breakdown (Min):
- 162V
- Voltage - Clamping (Max) @ Ipp:
- 234V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
1.5SMC170CAHM3/H FAQ
1.How can I place an order for 1.5SMC170CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC170CAHM3/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 1.5SMC170CAHM3/H reliable?
The price and inventory of 1.5SMC170CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC170CAHM3/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC170CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC170CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC170CAHM3/H?
1.5SMC170CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC170CAHM3/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 1.5SMC170CAHM3/H?
For technical support, including 1.5SMC170CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC170CAHM3/H requirements.
6.How does Aetrix verify that 1.5SMC170CAHM3/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC170CAHM3/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 1.5SMC170CAHM3/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC170CAHM3/H?
All 1.5SMC170CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC170CAHM3/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 1.5SMC170CAHM3/H part is unused and in its original packaging.
Return procedure for 1.5SMC170CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC170CAHM3/H Tags
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