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Vishay General Semiconductor - Diodes Division SMCJ17AHM3/H
- Part No.:
- SMCJ17AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ17AHM3/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
SMCJ17AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 17 V standoff voltage (VWM), 27.6 V clamping voltage at 54.3 A peak pulse current (10/1000 µs), and 1500 W peak pulse power dissipation - deployed in automotive ECUs, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ17AHM3/H datasheet, SMCJ17AHM3/H pinout, SMCJ17AHM3/H application, or SMCJ17AHM3/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction (HM3 suffix), low incremental surge resistance, and verified clamping performance under repetitive transients per IEC 61000-4-5.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds the breakdown threshold (18.9–20.9 V at 1 mA), it avalanches to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at 17 V) and fast response (<1 ns), while the SMC package supports automated placement and meets MSL level 1 (260 °C reflow).
Designed for unidirectional DC line protection, SMCJ17AHM3/H exhibits no forward conduction until ~3.5 V (at 100 A), making it unsuitable for AC or bidirectional applications - those require CA-suffix variants like SMCJ17CA. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8 mm × 8 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | 27.6 V at 54.3 A - clamping voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 1500 W - peak transient power handling capability, defining surge immunity level |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves efficiency in battery-powered systems |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMCJ17AHM3/H uses the SMC (DO-214AB) package: a rectangular, low-profile surface-mount case with two coplanar matte tin-plated leads. Polarity is marked by a cathode band on the body end; the banded terminal is the cathode (connected to system ground or return path), and the unmarked terminal is the anode (connected to protected line).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path | Connected to system ground or low-impedance return; carries full surge current during clamping |
| Anode (unmarked end) | Protected line input | Connected to DC rail or signal line requiring overvoltage protection; voltage referenced to cathode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS-compliant (HM3) | Meets EU RoHS Directive 2011/65/EU and IEC 61249-2-21; eliminates brominated flame retardants for safer recycling |
| Low incremental surge resistance | Enables tighter clamping (27.6 V at 54.3 A) versus higher-resistance TVS devices, reducing voltage overshoot on sensitive loads |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing flow |
| Glass passivated junction | Provides stable electrical characteristics over time and temperature, minimizing parameter drift in long-life deployments |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VCC and GND, clamping surges within nanoseconds. Use Value: Limits voltage to ≤27.6 V during 54.3 A transients, preventing MCU latch-up or permanent damage per AEC-Q100 stress requirements. | Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485) on PLC modules exposed to field wiring-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on each signal line, referenced to local ground plane. Use Value: Withstands repeated 1 kV/500 A surges (IEC 61000-4-5) while maintaining <1 µA leakage at 17 V, preserving signal integrity. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Protection |
Use Scenario: Securing 24 V/48 V DC inputs of PoE-powered network switches and base stations against lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on bulk power entry, coordinated with upstream fuses and secondary filtering. Use Value: 1500 W PPPM rating handles multi-kA induced transients; thermal resistance (75 °C/W) supports derating up to +85 °C ambient. | Use Scenario: Adding overvoltage resilience to USB-C VBUS lines in portable media players and docking stations. IC Role / Device Role / Timing Role: Secondary-level TVS after primary ESD protection, targeting slower but higher-energy transients. Use Value: Clamps 10/1000 µs surges to 27.6 V before downstream USB PD controllers reach overvoltage lockout thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17A-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM (17 V) and VC (27.6 V) | Used where board space is constrained but surge energy is lower (e.g., consumer USB ports) | Select SMCJ17AHM3/H for 1500 W surge handling; choose SMAJ17A-E3/57T only if layout area limits SMC footprint |
| SMCJ17AHE3_A/H | Same electrical specs and SMC package, but RoHS-compliant commercial grade (E3) instead of halogen-free (HM3); not AEC-Q101 qualified | Suitable for non-automotive industrial or telecom applications where halogen-free compliance is not mandated | Choose SMCJ17AHM3/H when halogen-free and AEC-Q101 are required; use SMCJ17AHE3_A/H for cost-sensitive commercial designs |
Compared with SMAJ17A-E3/57T and SMCJ17AHE3_A/H, SMCJ17AHM3/H uniquely delivers 1500 W surge capacity in a halogen-free, AEC-Q101-qualified package - essential for automotive and high-reliability industrial deployments where both energy handling and regulatory compliance are mandatory.
Availability
SMCJ17AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and telecom infrastructure requiring stable component supply across extended production lifecycles.
Supply support for SMCJ17AHM3/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 SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through robust, standardized, and qualified components.
FAQ
What is the clamping voltage of SMCJ17AHM3/H and how is it measured?
The clamping voltage of SMCJ17AHM3/H is 27.6 V, measured at a peak pulse current (IPPM) of 54.3 A using the standardized 10/1000 µs double-exponential surge waveform. This value reflects the maximum voltage seen across the device terminals during surge conduction and is critical for ensuring protected circuits remain below their absolute maximum ratings. The SMCJ17AHM3/H maintains this clamping performance consistently due to its low incremental surge resistance and glass-passivated junction.
Is SMCJ17AHM3/H suitable for bidirectional signal line protection?
No, SMCJ17AHM3/H is a unidirectional TVS diode and is not suitable for bidirectional signal line protection. Its design allows conduction only in reverse bias (cathode positive relative to anode), making it appropriate for DC power rail protection. For bidirectional applications such as RS-485 or CAN bus lines, the bidirectional variant SMCJ17CA must be used - it provides symmetrical clamping in both polarities and has identical VWM and PPPM ratings.
Does SMCJ17AHM3/H meet automotive qualification standards?
Yes, SMCJ17AHM3/H is AEC-Q101 qualified, confirming its suitability for automotive applications. The HM3 suffix explicitly denotes halogen-free, RoHS-compliant construction combined with AEC-Q101 stress testing - including temperature cycling, highly accelerated life testing (HALT), and mechanical shock. This qualification validates its use in engine control units, body electronics, and ADAS power domains where reliability under thermal and vibration stress is mandatory.
What is the thermal resistance of SMCJ17AHM3/H and how does it affect PCB layout?
The typical junction-to-ambient thermal resistance (RθJA) of SMCJ17AHM3/H is 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes standard FR-4 PCB with 1 oz copper. To maintain safe junction temperatures below 150 °C under repeated surges, designers must ensure adequate copper area and avoid excessive trace length between the device and ground plane. Derating curves in the datasheet (Fig. 2) guide thermal design for elevated ambient temperatures.
How does the HM3 suffix differ from the E3 or HE3 suffix in SMCJ17A variants?
The HM3 suffix in SMCJ17AHM3/H indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. In contrast, E3 denotes RoHS-compliant commercial grade only, and HE3 adds AEC-Q101 qualification but retains brominated flame retardants. Thus, SMCJ17AHM3/H satisfies both environmental (halogen-free) and automotive reliability requirements - a distinction critical for Tier 1 suppliers complying with OEM material declarations and sustainability mandates.
SMCJ17AHM3/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):
- 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)
SMCJ17AHM3/H FAQ
1.How can I place an order for SMCJ17AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ17AHM3/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 SMCJ17AHM3/H reliable?
The price and inventory of SMCJ17AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ17AHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ17AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ17AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ17AHM3/H?
SMCJ17AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ17AHM3/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 SMCJ17AHM3/H?
For technical support, including SMCJ17AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ17AHM3/H requirements.
6.How does Aetrix verify that SMCJ17AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ17AHM3/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 SMCJ17AHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ17AHM3/H?
All SMCJ17AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ17AHM3/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 SMCJ17AHM3/H part is unused and in its original packaging.
Return procedure for SMCJ17AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ17AHM3/H Tags
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