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Vishay General Semiconductor - Diodes Division SMCJ7.5CAHM3/H
- Part No.:
- SMCJ7.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ7.5CAHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,886
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Product details
Overview
SMCJ7.5CAHM3/H 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 7.5 V standoff voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, 1500 W peak pulse power (10/1000 µs), and clamps transients to ≤12.9 V at 116.3 A peak surge current - deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ7.5CAHM3/H datasheet, SMCJ7.5CAHM3/H pinout, SMCJ7.5CAHM3/H application, or SMCJ7.5CAHM3/H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 75 °C/W), and real-world use context for ESD/lightning/surge protection in harsh environments.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. Its glass-passivated junction ensures stable clamping performance and low leakage (<100 µA at VWM), while the SMC package supports automated placement and meets MSL Level 1 (260 °C reflow peak).
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits a VBR temperature coefficient of +0.067 %/°C - enabling predictable voltage shift across thermal extremes in under-hood automotive or industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse/forward working voltage before clamping initiates |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤12.9 V at 116.3 A - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling capability per single transient event |
| ID @ VWM | ≤100 µA - low reverse leakage ensuring minimal standby power loss and signal integrity |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, critical for derating in enclosed enclosures |
| Package | SMC (DO-214AB) - surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for full 1500 W rating |
Pinout & Package
SMCJ7.5CAHM3/H uses the SMC (DO-214AB) package: a 2-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking - terminals are functionally interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient input/output node | Connects to protected line (e.g., CAN_H or 12 V rail); symmetrical conduction in either direction |
| Terminal 2 | Transient input/output node | Completes bidirectional clamping path to ground or reference; no polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC J-STD-201 Class 2 whisker resistance and environmental regulations |
| Low incremental surge resistance | Enables tight clamping (VC − VBR = ~4.6 V) and high energy absorption without voltage overshoot |
| Fast response time & glass passivation | Sub-nanosecond turn-on and stable junction characteristics over lifetime and temperature |
| MSL Level 1 rating | Allows unlimited floor life and standard 260 °C reflow without moisture-related failure risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and alternator transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground to shunt surges exceeding 7.5 V. Use Value: Limits voltage seen by downstream LDOs and MCUs to ≤12.9 V during 116 A transients, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loop) of pressure sensors exposed to ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across signal and return lines to clamp fast-rising common-mode transients. Use Value: Maintains signal fidelity with <100 µA leakage at 7.5 V and sub-ns response, avoiding baseline shift or measurement error. |
| Telecom Interface Surge Protection | Consumer USB Port ESD Protection |
|
Use Scenario: Shielding RS-485 transceivers in outdoor base stations from lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Primary-level TVS installed at connector entry point to absorb >1 kV/10/1000 µs threats before reaching IC pins. Use Value: Delivers 1500 W pulse handling with symmetric clamping, eliminating need for separate forward/reverse devices. |
Use Scenario: Hardening USB 2.0 D+/D− lines in smart home hubs against human-body-model (HBM) ESD events up to ±15 kV. IC Role / Device Role / Timing Role: Bidirectional suppressor placed differential across data pair to clamp both positive and negative ESD strikes. Use Value: Achieves <100 µA leakage and 12.9 V clamping to preserve signal integrity while meeting IEC 61000-4-2 Level 4 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5CA | Lower PPPM (400 W), smaller SMA package, higher RθJA (110 °C/W) | Suitable only for lower-energy transients; requires larger derating margin above 70 °C ambient | Select when space-constrained and surge threat level is ≤400 W (e.g., consumer USB ports) |
| SMCJ7.5CAHE3/H | Same electrical specs and SMC package, but RoHS-compliant commercial grade (not AEC-Q101 or halogen-free) | Lacks automotive qualification and JEDEC J-STD-201 whisker resistance; limited to non-automotive industrial use | Choose for cost-sensitive non-automotive designs where AEC-Q101 and halogen-free status are not required |
Compared with SMAJ7.5CA and SMCJ7.5CAHE3/H, the SMCJ7.5CAHM3/H uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and halogen-free construction - making it the only option qualified for under-hood automotive deployment with full industrial surge immunity.
Availability
SMCJ7.5CAHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom infrastructure equipment, and consumer USB protection requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ7.5CAHM3/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 and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in automotive, industrial, and telecom systems where robustness and AEC-Q101 validation are mandatory.
FAQ
What does the "HM3" suffix mean in SMCJ7.5CAHM3/H?
The HM3 suffix in SMCJ7.5CAHM3/H indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance and AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3/M3) and confirms suitability for automotive under-hood applications where material compliance and long-term reliability are critical. The "H" denotes 7-inch tape-and-reel packaging.
Is SMCJ7.5CAHM3/H unidirectional or bidirectional?
SMCJ7.5CAHM3/H is a bidirectional TVS diode, as confirmed by the "CA" suffix and documentation stating "electrical characteristics apply in both directions." Unlike unidirectional variants (e.g., SMCJ7.5A), it provides symmetrical clamping for AC-coupled lines, differential signals, or any application where polarity reversal may occur - such as RS-485 buses or USB D+/D− pairs.
What is the maximum clamping voltage for SMCJ7.5CAHM3/H at its rated surge current?
The maximum clamping voltage (VC) for SMCJ7.5CAHM3/H is 12.9 V at its rated peak pulse current (IPPM) of 116.3 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is validated per ANSI/IEEE C62.35 standards.
Can SMCJ7.5CAHM3/H be used in place of SMCJ7.5A in a design?
No - SMCJ7.5CAHM3/H is bidirectional while SMCJ7.5A is unidirectional, so direct substitution requires circuit review. The unidirectional SMCJ7.5A has a cathode band and conducts only in reverse bias; replacing it with SMCJ7.5CAHM3/H introduces conduction in both directions, potentially disrupting DC biasing or forward-path functionality. Use SMCJ7.5CAHM3/H only where bidirectional protection is explicitly intended.
What PCB layout guidance applies to SMCJ7.5CAHM3/H to achieve its full 1500 W rating?
To achieve the full 1500 W peak pulse power rating, SMCJ7.5CAHM3/H must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal resistance and reduce surge capability. Avoid thermal reliefs on these pads, and ensure solid inner-layer copper planes connected via multiple vias to enhance heat dissipation during transient events.
SMCJ7.5CAHM3/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 116.3A
- 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)
SMCJ7.5CAHM3/H FAQ
1.How can I place an order for SMCJ7.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ7.5CAHM3/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 SMCJ7.5CAHM3/H reliable?
The price and inventory of SMCJ7.5CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ7.5CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMCJ7.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ7.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ7.5CAHM3/H?
SMCJ7.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ7.5CAHM3/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 SMCJ7.5CAHM3/H?
For technical support, including SMCJ7.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ7.5CAHM3/H requirements.
6.How does Aetrix verify that SMCJ7.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMCJ7.5CAHM3/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 SMCJ7.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMCJ7.5CAHM3/H?
All SMCJ7.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ7.5CAHM3/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 SMCJ7.5CAHM3/H part is unused and in its original packaging.
Return procedure for SMCJ7.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ7.5CAHM3/H Tags
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