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Vishay General Semiconductor - Diodes Division SMCJ17CAHM3_A/I
- Part No.:
- SMCJ17CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17CAHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,906
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Product details
Overview
SMCJ17CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 27.6 V maximum clamping voltage (VC) at 54.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed on power rails and signal lines in automotive ECUs and industrial I/O modules.
For engineers reviewing the SMCJ17CAHM3_A/I datasheet, SMCJ17CAHM3_A/I pinout, SMCJ17CAHM3_A/I application, or SMCJ17CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, and compatibility with 8.0 mm × 8.0 mm copper pad thermal layout per JEDEC standards.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM = 17 V, it avalanches symmetrically in both directions to clamp voltage at ≤27.6 V while diverting up to 54.3 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), requiring minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated PPPM. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101 qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 18.9 V / 20.9 V at IT = 1.0 mA - verified breakdown threshold with ±5.5% tolerance |
| VC @ IPPM | 27.6 V at 54.3 A - clamping voltage under full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W - peak pulse power handling capability with standard 10/1000 μs waveform |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves signal integrity and standby power |
| TJ max | +150 °C - extended junction temperature rating supports under-hood automotive use |
| MSL Level | Level 1 (per J-STD-020) - no floor life limitation; safe for standard reflow without baking |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One side of symmetrical PN junction; connects to protected line or rail |
| Terminal 2 | Cathode (bidirectional) | Other side of symmetrical PN junction; connects to ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Equal VBR and VC in both polarities - protects AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - suitable for ECU, ADAS, and body control modules |
| Halogen-free & RoHS | HM3 suffix confirms compliance with JEDEC J-STD-20 and EU RoHS Directive 2011/65/EU |
| Low incremental surge resistance | Enables tight VC margin - 27.6 V clamping at 54.3 A ensures <10 V overvoltage margin for 18 V systems |
| Fast response time | <1.0 ps intrinsic junction response - clamps before most IC damage thresholds are exceeded |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery line in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Shunt TVS diode placed between battery rail and ground, clamping transients before they reach MCU power pins. Use Value: With VWM = 17 V and VC = 27.6 V, it remains inactive during normal operation but limits surge energy to safe levels for downstream 3.3 V/5 V regulators and CAN transceivers. | Use Scenario: Analog output line (0–10 V) from pressure sensor in factory automation PLC module. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and return, guarding against ESD (IEC 61000-4-2) and inductive switching noise. Use Value: Symmetrical clamping ensures protection regardless of signal polarity reversal; low ID (<1.0 μA) avoids loading the high-impedance sensor output. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Suppression |
Use Scenario: DC power input (24 V) on telecom remote radio head exposed to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary shunt protector upstream of DC/DC converter, sized for 1500 W peak dissipation. Use Value: 1500 W PPPM rating and 8.0 mm × 8.0 mm pad layout support sustained surge handling without thermal runaway. | Use Scenario: VBUS line in USB 2.0 host port subjected to human-body-model (HBM) ESD events. IC Role / Device Role / Timing Role: Fast-response TVS placed between VBUS and GND to clamp ESD spikes before reaching USB controller. Use Value: Sub-nanosecond response and 27.6 V clamping prevent latch-up or gate oxide damage in USB PHY ICs rated for 30 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CAHE3_A/I | Lower PPPM (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA) | Not suitable for 1500 W surges; limited to low-energy ESD or board-level transients | Select only when space-constrained and surge energy is ≤400 W |
| SMCJ17CAHE3_A/I | Same electrical specs and SMC package, but HE3 suffix indicates AEC-Q101 + RoHS (non-halogen-free) | Identical performance and thermal behavior; differs only in halogen content and material compliance | Choose HE3 if halogen-free requirement is not mandated; HM3 required for strict automotive Tier-1 specs |
Compared with SMCJ17CAHE3_A/I and SMAJ17CAHE3_A/I, the SMCJ17CAHM3_A/I uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only option meeting full Tier-1 automotive supply chain requirements for high-energy transient environments.
Availability
SMCJ17CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom base station power supplies requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMCJ17CAHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure resilience is critical.
FAQ
What does the "HM3" suffix mean in SMCJ17CAHM3_A/I?
The HM3 suffix in SMCJ17CAHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JEDEC J-STD-20 MSL Level 1, JESD201 Class 2 whisker resistance, and automotive reliability testing - distinguishing it from commercial-grade (E3) or non-halogen-free automotive (HE3) variants of the same SMCJ17CAHM3_A/I device.
Is SMCJ17CAHM3_A/I bidirectional, and how is polarity identified?
Yes, SMCJ17CAHM3_A/I is a bidirectional TVS diode - its CA suffix explicitly indicates symmetrical clamping in both directions. Unlike unidirectional versions, it has no cathode band or polarity marking; both terminals are functionally identical and interchangeable in circuit layout, enabling simplified placement on AC or floating signal paths.
What is the maximum clamping voltage of SMCJ17CAHM3_A/I under surge conditions?
The maximum clamping voltage of SMCJ17CAHM3_A/I is 27.6 V, measured at 54.3 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuits during worst-case transients.
Can SMCJ17CAHM3_A/I be used in place of SMCJ17A or SMCJ17CA without redesign?
No - SMCJ17CAHM3_A/I is not a drop-in replacement for unidirectional SMCJ17A or non-AEC-Q101 SMCJ17CA. While electrical parameters align, the HM3 suffix requires validation of halogen-free compliance and automotive qualification in your BOM. PCB layout remains identical (same SMC package), but qualification documentation and supply chain traceability must be updated to reflect SMCJ17CAHM3_A/I.
What thermal pad layout is required to achieve the rated 1500 W PPPM for SMCJ17CAHM3_A/I?
To achieve the full 1500 W peak pulse power rating, SMCJ17CAHM3_A/I must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per JEDEC test condition. Smaller pads reduce thermal mass and increase junction temperature, derating PPPM - refer to Figure 2 in the Vishay document 88394 for exact derating curves versus pad area and ambient temperature.
SMCJ17CAHM3_A/I 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 54.3A
- 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)
SMCJ17CAHM3_A/I FAQ
1.How can I place an order for SMCJ17CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17CAHM3_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 SMCJ17CAHM3_A/I reliable?
The price and inventory of SMCJ17CAHM3_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 SMCJ17CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ17CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17CAHM3_A/I?
SMCJ17CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17CAHM3_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 SMCJ17CAHM3_A/I?
For technical support, including SMCJ17CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ17CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ17CAHM3_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 SMCJ17CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ17CAHM3_A/I?
All SMCJ17CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17CAHM3_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 SMCJ17CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ17CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17CAHM3_A/I Tags
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