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Vishay General Semiconductor - Diodes Division SMCJ170AHM3/H
- Part No.:
- SMCJ170AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170AHM3/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,098
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Product details
Overview
SMCJ170AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 170 V standoff voltage (VWM), 189–209 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) at 10/1000 µs. It clamps transients to ≤275 V at 5.5 A peak surge current and operates from –55 °C to +150 °C, commonly used to protect automotive power rails and industrial sensor interfaces.
For engineers reviewing the SMCJ170AHM3/H datasheet, SMCJ170AHM3/H pinout, SMCJ170AHM3/H application, or SMCJ170AHM3/H equivalent, this page delivers verified electrical specs, thermal behavior, AEC-Q101 qualification status, SMC package mechanical data, and real-world use cases - all aligned with Vishay Document #88394 (Rev. 09-Jan-2024).
Technical Context
The SMCJ170AHM3/H uses a glass-passivated silicon junction optimized for fast response (<1 ns) to ESD and lightning-induced surges. Its unidirectional polarity features a cathode band marking and supports 200 A non-repetitive forward surge current (IFSM) under 8.3 ms half-sine conditions.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for 12–48 V DC systems with safety headroom. |
| VBR (Breakdown Voltage) | 189–209 V at IT = 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 275 V at IPPM = 5.5 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity per IEC 61000-4-5 Level 4 surge events; validated with derating above 25 °C. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; compatible with automated pick-and-place. |
| AEC-Q101 Qualified | Yes - Validated for automotive applications including powertrain control modules and body electronics per stress test requirements. |
Pinout & Package
SMCJ170AHM3/H is housed in the SMC (DO-214AB) package: a molded, halogen-free, RoHS-compliant surface-mount case with matte tin-plated leads solderable per J-STD-002. Polarity is marked by a cathode band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to system ground or low-side return path; conducts during reverse-biased surge clamping. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 170 V rail); enters avalanche breakdown when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced leakage drift in harsh environments. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow up to 260 °C peak without baking - simplifies manufacturing flow. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills automotive OEM material compliance requirements (e.g., GMW3172, Ford WSS-M99P9999-A1) and environmental regulations. |
| 1500 W peak pulse rating | Meets IEC 61000-4-5 surge immunity for industrial equipment and automotive ECUs subjected to 4 kV line-to-ground surges. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power supply lines against load dump and alternator ripple in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp transients before they reach regulator ICs. Use Value: Clamps 120 V load dump spikes to ≤275 V within nanoseconds, preventing damage to LDOs and microcontrollers rated for 36 V absolute max. | Use Scenario: Shielding analog front-end inputs of pressure sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-connected TVS across signal and ground pins to shunt inductive kick energy away from ADC inputs. Use Value: Limits induced voltage to <275 V while maintaining <1 µA leakage at 170 V, preserving sensor accuracy and long-term calibration stability. |
| Telecom DC Feeder Protection | Renewable Energy Inverter DC Link |
Use Scenario: Safeguarding -48 V telecom rectifier outputs from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail relative to ground, leveraging unidirectional architecture for precise clamping polarity. Use Value: Withstands repeated 1500 W surges while holding leakage below 1 µA at -48 V, ensuring minimal standby power loss in 24/7 base station operation. | Use Scenario: Protecting IGBT gate drivers in solar inverter DC link stages from switching-induced voltage spikes. IC Role / Device Role / Timing Role: Mounted across DC+ and DC− bus terminals to absorb commutation energy and prevent gate oxide rupture. Use Value: Delivers 275 V clamping at 5.5 A with <1 ns response, reducing dv/dt stress on driver ICs and extending mean time between failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHM3 | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy surges in space-constrained consumer designs | Select only if board area is critical and surge threat level is ≤1 kV. |
| SMCJ170AHE3 | Same electrical specs and package, but E3 suffix indicates RoHS-compliant commercial grade (non-AEC-Q101) | Lacks automotive qualification; not approved for under-hood or safety-critical vehicle subsystems | Choose for cost-sensitive industrial or telecom applications where AEC-Q101 is not mandated. |
Compared with SMCJ170AHM3/H, SMBJ170AHM3 trades surge robustness for compactness, while SMCJ170AHE3 retains full electrical performance but omits automotive qualification - making SMCJ170AHM3/H the sole choice for AEC-Q101–required deployments demanding 1500 W clamping.
Availability
SMCJ170AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power supplies, and renewable energy inverters requiring stable component supply and guaranteed AEC-Q101 compliance.
Supply support for SMCJ170AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and long-term parametric stability are mandatory.
FAQ
What is the clamping voltage of the SMCJ170AHM3/H at its rated peak pulse current?
The SMCJ170AHM3/H has a maximum clamping voltage (VC) of 275 V at its specified peak pulse current (IPPM) of 5.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay Document #88394, ensuring predictable overvoltage limiting for protected circuits downstream of the SMCJ170AHM3/H.
Is the SMCJ170AHM3/H qualified for automotive applications?
Yes, the SMCJ170AHM3/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification. It is explicitly rated for automotive use per Vishay's ordering information and thermal characterization, supporting deployment in engine control units, body control modules, and ADAS power domains where reliability under temperature cycling and vibration is essential.
How does the SMCJ170AHM3/H differ from the SMCJ170AHE3 variant?
The SMCJ170AHM3/H and SMCJ170AHE3 share identical electrical parameters (VWM = 170 V, VBR = 189–209 V, VC = 275 V) and SMC package, but differ in qualification and materials: HM3/H denotes halogen-free + AEC-Q101, whereas E3 indicates RoHS-compliant commercial grade only. Thus, SMCJ170AHM3/H is required for automotive applications, while SMCJ170AHE3 suffices for industrial or telecom use where qualification is not mandated.
What is the thermal resistance from junction to ambient for the SMCJ170AHM3/H?
The SMCJ170AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal. This value assumes natural convection and is documented in Vishay's Thermal Characteristics table (Document #88394, p.3), guiding heatsinking decisions for continuous power dissipation up to 6.5 W.
Can the SMCJ170AHM3/H be used in bidirectional protection circuits?
No, the SMCJ170AHM3/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SMCJ170CA). Using SMCJ170AHM3/H in bidirectional configurations risks failure during positive-going transients on the anode side, as it lacks symmetrical avalanche characteristics in both polarities.
SMCJ170AHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ170AHM3/H FAQ
1.How can I place an order for SMCJ170AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170AHM3/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 SMCJ170AHM3/H reliable?
The price and inventory of SMCJ170AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ170AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ170AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170AHM3/H?
SMCJ170AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170AHM3/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 SMCJ170AHM3/H?
For technical support, including SMCJ170AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170AHM3/H requirements.
6.How does Aetrix verify that SMCJ170AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ170AHM3/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 SMCJ170AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ170AHM3/H?
All SMCJ170AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170AHM3/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 SMCJ170AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ170AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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