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Vishay General Semiconductor - Diodes Division SMCJ170AHM3_A/H
- Part No.:
- SMCJ170AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ170AHM3_A/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,831
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Product details
Overview
SMCJ170AHM3_A/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, 189–209 V breakdown range at 1 mA, and 275 V clamping voltage at 5.5 A peak pulse current. It delivers 1500 W peak pulse power handling under 10/1000 µs waveform and operates across -55 °C to +150 °C junction temperature.
For engineers reviewing the SMCJ170AHM3_A/H datasheet, SMCJ170AHM3_A/H pinout, SMCJ170AHM3_A/H application, or SMCJ170AHM3_A/H equivalent, key selection criteria include clamping voltage margin vs. protected IC VBR, unidirectional polarity alignment with DC-biased lines, thermal derating above 25 °C ambient, and AEC-Q101 qualification status for automotive subsystems.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) to transient overvoltages induced by inductive switching or ESD events. Its low incremental surge resistance ensures minimal voltage overshoot during 1500 W surges, while MSL Level 1 rating supports lead-free reflow without popcorn cracking.
The device features unidirectional polarity with cathode band marking, 75 °C/W junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads, and halogen-free, RoHS-compliant construction per Vishay HM3 suffix designation. It meets UL 497B recognition for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 170 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected line DC bias. |
| Breakdown Voltage (VBR) | 189–209 V at 1 mA - Confirmed minimum/maximum threshold where device enters avalanche conduction; defines clamping onset window. |
| Clamping Voltage (VC) | 275 V at 5.5 A (10/1000 µs) - Peak voltage seen by downstream circuit during rated surge; determines required IC overvoltage margin. |
| Peak Pulse Power (PPPM) | 1500 W - Energy-handling capacity under standardized 10/1000 µs surge; validates robustness against IEC 61000-4-5 Level 4 transients. |
| Junction Temperature Range | -55 °C to +150 °C - Specifies full operational envelope for automotive engine bay or industrial control environments. |
| Leakage Current (ID) | 1.0 µA max at 170 V - Ensures negligible standby power loss and signal integrity on high-impedance sensor or communication lines. |
| 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. |
Pinout & Package
SMCJ170AHM3_A/H uses the SMC (DO-214AB) package: a molded plastic case with two coplanar matte tin-plated leads, cathode identified by a visible band. The device is unidirectional; polarity must be observed during PCB layout to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node; completes conduction path during reverse-biased surge events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 12 V rail, CAN_H); carries surge current into anode when VLINE exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TCT, and ESD HBM ≥ 2 kV. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance; supports green manufacturing and end-of-life compliance. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on protected ICs-e.g., ensures <275 V reaches a 300 V-rated MOSFET gate driver during surge. |
| Fast response time | Sub-nanosecond turn-on enables suppression of ESD (IEC 61000-4-2) and fast-rising inductive spikes before system damage occurs. |
| 1500 W peak pulse rating | Supports single-event surge immunity up to IEC 61000-4-5 4 kV open-circuit / 2 kA short-circuit test levels on 50 Ω source impedance. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protection of 12 V/24 V supply rails feeding ECUs, lighting modules, and infotainment systems against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input capacitor to clamp positive-going surges above 170 V. Use Value: Prevents latch-up or gate oxide rupture in downstream PMICs and microcontrollers during ISO 7637-2 Pulse 5a (load dump) events. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) and digital interfaces (e.g., RS-485, CAN) from field-induced surges in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS mounted directly at connector entry to suppress fast transients before reaching signal conditioning ICs. Use Value: Maintains signal fidelity and prevents false triggering in precision measurement circuits exposed to motor drive noise or lightning-induced coupling. |
| Telecom Power Feeds | Consumer DC Adapter Inputs |
Use Scenario: Input-stage protection on PoE-powered devices (e.g., IP cameras, wireless access points) subjected to Ethernet cable surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of DC-DC converter to absorb energy from IEC 61000-4-5 surges coupled onto data/power pairs. Use Value: Enables compliance with EN 61000-6-2 immunity requirements without degrading PoE negotiation or efficiency. |
Use Scenario: Secondary-side surge suppression on wall adapter outputs feeding USB-C PD controllers or battery management ICs. IC Role / Device Role / Timing Role: Compact SMC-packaged TVS integrated near output connector to block residual transients escaping primary-side isolation. Use Value: Eliminates need for external varistors or gas discharge tubes, reducing BOM count and board space in cost-sensitive consumer designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ170AHE3_A/H | Lower PPPM (400 W), same VWM/VBR, SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for load dump or lightning-level surges | Select when board space is constrained and surge threat level is limited to human-body-model ESD or low-energy switching noise. |
| SMCJ170AHE3_A/H | Identical electrical specs and SMC package, but RoHS-compliant commercial grade (non-halogen-free, non-AEC-Q101) | Approved for industrial/commercial use only; not certified for automotive production or harsh-environment deployments | Choose for cost-sensitive non-automotive applications where halogen-free or AEC-Q101 qualification is not mandated. |
Compared with SMCJ170AHM3_A/H, SMAJ170AHE3_A/H offers smaller size but insufficient energy handling for automotive load dump, while SMCJ170AHE3_A/H matches performance but lacks halogen-free and AEC-Q101 validation required for Tier 1 automotive sourcing.
Availability
SMCJ170AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom PoE feed protection, and consumer DC adapter inputs requiring stable component supply across extended temperature ranges and regulatory-compliant materials.
Supply support for SMCJ170AHM3_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 passive components with emphasis on reliability, power efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure, engineered for AEC-Q101 compliance, robust thermal performance, and compatibility with automated assembly processes.
FAQ
What is the clamping voltage of SMCJ170AHM3_A/H at its rated peak pulse current?
The SMCJ170AHM3_A/H has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current of 5.5 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 8 mm × 8 mm copper pads and defines the worst-case overvoltage imposed on protected circuitry during surge events. The SMCJ170AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMCJ170AHM3_A/H suitable for automotive applications?
Yes, SMCJ170AHM3_A/H is AEC-Q101 qualified and designated with the HM3 suffix, indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stress test requirements including high-temperature operating life, temperature cycling, and ESD robustness. The SMCJ170AHM3_A/H is specified for junction temperatures from -55 °C to +150 °C, making it appropriate for under-hood and body-control module deployments.
How does the SMCJ170AHM3_A/H differ from the SMCJ170AHE3_A/H variant?
The SMCJ170AHM3_A/H differs from SMCJ170AHE3_A/H in material composition and qualification: HM3 denotes halogen-free and AEC-Q101 qualified construction, whereas HE3 is RoHS-compliant but not halogen-free nor AEC-Q101 certified. Electrically and mechanically, both share identical VWM, VBR, VC, PPPM, and SMC package dimensions. The SMCJ170AHM3_A/H is required for automotive Tier 1 sourcing where halogen-free and AEC-Q101 compliance are mandatory.
What is the polarity configuration of SMCJ170AHM3_A/H?
The SMCJ170AHM3_A/H is a unidirectional TVS diode, with polarity indicated by a cathode band on the SMC (DO-214AB) package. During normal operation, it blocks reverse current up to 170 V; when a transient exceeds its breakdown voltage, it conducts from cathode to anode to clamp the overvoltage. Correct orientation is essential-cathode connects to the protected line, anode to ground. Bidirectional variants use the "CA" suffix (e.g., SMCJ170CA).
What thermal derating applies to SMCJ170AHM3_A/H above 25 °C ambient?
The SMCJ170AHM3_A/H requires linear thermal derating of its peak pulse power (PPPM) above 25 °C ambient, per Figure 2 in Vishay document 88394. At 75 °C ambient, PPPM drops to approximately 1125 W (75% of 1500 W); at 125 °C, it falls to ~750 W (50%). Derating is based on junction-to-ambient thermal resistance (RθJA = 75 °C/W) and assumes mounting on minimum recommended 8 mm × 8 mm copper pads. The SMCJ170AHM3_A/H retains full functionality within its -55 °C to +150 °C TJ range.
SMCJ170AHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for SMCJ170AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ170AHM3_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 SMCJ170AHM3_A/H reliable?
The price and inventory of SMCJ170AHM3_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 SMCJ170AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMCJ170AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ170AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ170AHM3_A/H?
SMCJ170AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ170AHM3_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 SMCJ170AHM3_A/H?
For technical support, including SMCJ170AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ170AHM3_A/H requirements.
6.How does Aetrix verify that SMCJ170AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMCJ170AHM3_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 SMCJ170AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMCJ170AHM3_A/H?
All SMCJ170AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ170AHM3_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 SMCJ170AHM3_A/H part is unused and in its original packaging.
Return procedure for SMCJ170AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ170AHM3_A/H Tags
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