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Vishay General Semiconductor - Diodes Division SMCJ90CAHM3_A/I
- Part No.:
- SMCJ90CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ90CAHM3_A/I.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,171
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Product details
Overview
SMCJ90CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 90 V standoff voltage (VWM), and 146 V maximum clamping voltage (VC) at 10.3 A peak pulse current (IPPM). It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive and industrial systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ90CAHM3_A/I datasheet, SMCJ90CAHM3_A/I pinout, SMCJ90CAHM3_A/I application, or SMCJ90CAHM3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, 1500 W surge handling, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector: during transient overvoltage events exceeding its 90 V standoff voltage (VWM), it avalanches to limit the downstream voltage to ≤146 V at 10.3 A (10/1000 μs waveform). Its bidirectional symmetry ensures identical clamping behavior in both polarities, eliminating polarity sensitivity in AC-coupled or floating signal paths.
Constructed with a glass-passivated silicon junction and housed in an SMC (DO-214AB) package rated MSL Level 1, the SMCJ90CAHM3_A/I delivers low incremental surge resistance, fast sub-nanosecond response time, and thermal stability up to 150 °C junction temperature - critical for under-hood automotive and high-reliability industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| VBR min/max | 100 V / 111 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 146 V - Clamped voltage seen by protected circuit at 10.3 A peak pulse current; determines worst-case stress on downstream components. |
| PPPM | 1500 W - Peak pulse power dissipation capability with 10/1000 μs waveform; quantifies transient energy absorption capacity. |
| ID @ VWM | 1.0 μA - Reverse leakage at 90 V; negligible loading on high-impedance signal lines or power rails. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design; supports automated assembly and robust thermal dissipation. |
Pinout & Package
SMCJ90CAHM3_A/I uses the SMC (DO-214AB) package: a two-terminal, bidirectional surface-mount device with no polarity marking. Both terminals are electrically symmetric; neither is designated anode or cathode. The package features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Input/Output Node | Connects to line under protection (e.g., CAN bus, sensor supply, power rail); carries full surge current during clamping. |
| Terminal 2 | Transient Input/Output Node | Electrically identical to Terminal 1; completes bidirectional clamping path to reference plane (e.g., ground or complementary rail). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR (100–111 V) and VC (146 V) in both directions - eliminates need for polarity-aware layout in differential or AC-coupled circuits. |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress-test requirements for temperature cycling, humidity, and mechanical shock. |
| Halogen-free & RoHS-compliant | HM3 suffix denotes halogen-free molding compound and lead finish - satisfies automotive OEM environmental mandates and end-of-life recycling requirements. |
| Low incremental surge resistance | Enables tight clamping (VC − VBR ≈ 46 V) under 10.3 A surge - minimizes voltage overshoot and reduces risk of downstream component damage. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60% RH - allows direct placement without baking or dry-pack handling, reducing manufacturing overhead. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC/DC converter input stage. Use Value: Limits transient excursions to ≤146 V, preventing latch-up or destruction of downstream PMICs and microcontrollers rated for 36 V absolute maximum. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop, 0–10 V voltage output) of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal and return lines, referenced to local ground. Use Value: Maintains signal integrity during ESD events (IEC 61000-4-2) and cable discharge by clamping common-mode surges without distorting low-level analog signals. |
| Telecom Interface Surge Protection | Consumer Device USB/DisplayPort ESD Guarding |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs in outdoor telecom base stations exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: First-line transient suppressor mounted at connector entry point, upstream of TVS arrays and filtering components. Use Value: Absorbs up to 1500 W of surge energy (10/1000 μs) while holding line voltage below 146 V - preserves communication link integrity during Category 4 surge events. | Use Scenario: Adding secondary-level ESD protection on high-speed data lines (USB 2.0, DisplayPort) in laptops and docking stations where primary protection resides in the controller. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) bidirectional clamp placed adjacent to connector pins. Use Value: Provides <1 ns response time and <1 μA leakage at 90 V - prevents data corruption without degrading signal rise/fall times or adding jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90CAHE3_A/I | Lower PPPM (400 W), smaller SMA package (DO-214AC), same VWM/VC specs. | Not suitable for high-energy surges (>400 W); limited thermal mass for repeated transients. | Select when board space is constrained and surge threat level is lower (e.g., internal signal lines vs. external connectors). |
| SMCJ90CA-E3/9AT | Same electrical specs and SMC package; RoHS-compliant but not halogen-free; commercial-grade (non-AEC-Q101). | Lacks automotive qualification and halogen-free certification - unsuitable for Tier 1 automotive BOMs. | Select for cost-sensitive industrial or consumer applications where AEC-Q101 and halogen-free status are not mandated. |
Compared with SMAJ90CAHE3_A/I and SMCJ90CA-E3/9AT, the SMCJ90CAHM3_A/I uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only choice for automotive power domain protection requiring full compliance and high-energy resilience.
Availability
SMCJ90CAHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom infrastructure equipment, and consumer device USB/DisplayPort protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMCJ90CAHM3_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, efficiency, and application-specific optimization.
The SMCJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 validation and robust surge immunity.
FAQ
What is the clamping voltage of the SMCJ90CAHM3_A/I at its rated peak pulse current?
The SMCJ90CAHM3_A/I clamps to a maximum of 146 V at its specified peak pulse current of 10.3 A (10/1000 μs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and represents the upper bound of voltage imposed on protected circuitry during a full-rated surge event. The SMCJ90CAHM3_A/I maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is the SMCJ90CAHM3_A/I suitable for automotive applications?
Yes, the SMCJ90CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting stringent automotive reliability and environmental requirements. It is explicitly rated for operation from −55 °C to +150 °C junction temperature and validated for mechanical shock, temperature cycling, and humidity exposure per AEC-Q101. The SMCJ90CAHM3_A/I is commonly deployed in engine control modules, body control units, and ADAS sensor interfaces.
How does the SMCJ90CAHM3_A/I differ from unidirectional SMCJ90A variants?
The SMCJ90CAHM3_A/I is bidirectional, meaning it provides symmetrical clamping in both polarities with identical breakdown (100–111 V) and clamping (146 V) characteristics. In contrast, unidirectional SMCJ90A variants have a defined cathode band and conduct forward current like a rectifier; they only clamp in reverse bias. The SMCJ90CAHM3_A/I has no polarity marking and is used where signal lines float or carry AC content - such as CAN bus, RS-485, or audio lines - whereas unidirectional types suit DC power rail protection.
What is the thermal resistance of the SMCJ90CAHM3_A/I, and how does it affect PCB layout?
The SMCJ90CAHM3_A/I 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 pads per terminal. This value assumes minimal copper area; increasing pad size or adding thermal vias lowers RθJA and improves sustained power handling. For reliable operation near its 6.5 W steady-state dissipation limit, PCB layout must allocate adequate copper area and avoid enclosing the SMCJ90CAHM3_A/I in thermally isolated zones.
Does the SMCJ90CAHM3_A/I require a heatsink for standard surge protection use?
No, the SMCJ90CAHM3_A/I does not require an external heatsink for transient suppression duty, as its 1500 W peak pulse power rating is designed for short-duration events (≤1000 μs), during which thermal mass dominates over steady-state conduction. However, for applications involving frequent or repetitive surges - such as motor drive feedback loops - thermal management via enlarged copper pads or localized ground planes is recommended to prevent cumulative junction temperature rise. The SMCJ90CAHM3_A/I's RθJL of 15 °C/W supports efficient heat transfer to PCB copper, making external heatsinks unnecessary in typical use cases.
SMCJ90CAHM3_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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 146V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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)
SMCJ90CAHM3_A/I FAQ
1.How can I place an order for SMCJ90CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ90CAHM3_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 SMCJ90CAHM3_A/I reliable?
The price and inventory of SMCJ90CAHM3_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 SMCJ90CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ90CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ90CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ90CAHM3_A/I?
SMCJ90CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ90CAHM3_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 SMCJ90CAHM3_A/I?
For technical support, including SMCJ90CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ90CAHM3_A/I requirements.
6.How does Aetrix verify that SMCJ90CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ90CAHM3_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 SMCJ90CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ90CAHM3_A/I?
All SMCJ90CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ90CAHM3_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 SMCJ90CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMCJ90CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ90CAHM3_A/I Tags
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