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Vishay General Semiconductor - Diodes Division SMA5J7.5CAHM3/I
- Part No.:
- SMA5J7.5CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J7.5CAHM3/I.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,643
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Product details
Overview
SMA5J7.5CAHM3/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for high-energy surge protection on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR at 1.0 mA), 500 W peak pulse power (10/1000 μs), 100 A peak pulse current (IPPM), and clamps to ≤12.9 V at rated surge. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive electronics.
For engineers reviewing the SMA5J7.5CAHM3/I datasheet, SMA5J7.5CAHM3/I pinout, SMA5J7.5CAHM3/I application, or SMA5J7.5CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage under 100 A surge, compatibility with automated SMT placement, and qualification for harsh-environment automotive use per AEC-Q101.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche junction to limit reverse voltage across protected circuits. Its bidirectional symmetry ensures identical clamping behavior in both polarities, with no polarity marking required on the SMA package.
Designed for 10/1000 μs surge waveforms, it delivers 500 W peak pulse power while maintaining thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead). The glass-passivated chip junction enables fast response time (<1 ns) and stable performance over -55 °C to +150 °C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range; ensures predictable turn-on under ESD or lightning-induced surges. |
| IPPM | 100 A (10/1000 μs) - Peak surge current handling capacity; determines protection level against IEC 61000-4-5 Level 4 surges. |
| VC | ≤12.9 V at IPPM - Clamping voltage under full-rated surge; directly limits stress on downstream ICs like CAN transceivers or microcontrollers. |
| PPPM | 500 W - Peak pulse power rating; enables robust protection without thermal runaway when mounted on 5 mm × 5 mm copper pads. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch; compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
SMA (DO-214AC) package: surface-mount, bidirectional device with no polarity marking; two terminals (anode/cathode symmetric), matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No designated polarity; either terminal serves as input/output for transient energy diversion in AC or differential signal lines. |
| Case (body) | Thermal and mechanical interface | Plastic body meets UL 94 V-0; transfers heat to PCB copper pads-requires minimum 5.0 mm × 5.0 mm pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions-enables single-device protection of AC-coupled or differential interfaces like RS-485 or CAN FD. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-supports use in ADAS sensors and body control modules. |
| Halogen-free & RoHS | HM3 suffix denotes halogen-free molding compound and RoHS compliance-meets EU ELV and China RoHS requirements for vehicle electronics. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients-critical for protecting 3.3 V or 5 V logic interfaces without overvoltage damage. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH-eliminates bake requirements prior to reflow, reducing manufacturing cost and risk of moisture-induced popcorning. |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting CAN_H/CAN_L lines in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting line voltage to ≤12.9 V during 100 A surge events. Use Value: Prevents latch-up or permanent damage to CAN transceivers (e.g., TJA1042) while maintaining signal integrity up to 1 Mbps. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Differential-line TVS suppressing common-mode surges up to ±1 kV (IEC 61000-4-5). Use Value: Enables reliable communication over 1200 m cable runs without data corruption or transceiver failure during EFT bursts. |
| Consumer USB-C Port ESD | Telecom DSL Line Protection |
|
Use Scenario: Secondary-level ESD protection on USB-C CC and VCONN pins in portable chargers and docks. IC Role / Device Role / Timing Role: Fast-response (<1 ns) clamping of ±15 kV contact discharge per IEC 61000-4-2. Use Value: Complements primary polymer-based TVS by providing low-clamp backup protection without adding capacitance that degrades 10 Gbps signaling. |
Use Scenario: Overvoltage protection on POTS/DSL line cards subjected to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: High-power (500 W) transient shunt diverting >10 kA induced currents away from line drivers and codecs. Use Value: Extends mean time between failures (MTBF) of DSLAM line cards in tropical climates with frequent thunderstorms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J7.5CAHE3/I | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant with brominated flame retardant (not halogen-free). | Acceptable for non-automotive industrial use where halogen-free is not mandated by OEM spec. | Select SMA5J7.5CAHE3/I if halogen content is unrestricted and cost optimization is prioritized. |
| SMB5J7.5CAHM3 | Same VWM, VBR, and PPPM, but SMB (DO-214AA) package-larger footprint (4.58 mm × 3.94 mm vs. SMA's 4.93 mm × 3.99 mm) and higher RθJA (100 °C/W). | Suitable for lower-density boards where thermal margin allows larger package; not drop-in compatible due to different pad layout. | Choose SMB5J7.5CAHM3 only when board space permits and thermal derating analysis confirms adequate junction temperature. |
Compared with SMA5J7.5CAHE3/I, the SMA5J7.5CAHM3/I offers halogen-free compliance for strict automotive supply chains; compared with SMB5J7.5CAHM3, it provides superior power density and thermal performance in constrained layouts-making it optimal for modern ADAS sensor modules and compact telecom edge devices.
Availability
SMA5J7.5CAHM3/I is available at Aetrix Electronics and suitable for automotive electronics, industrial communications, consumer port protection, and telecom line card designs requiring stable component supply with AEC-Q101 validation and halogen-free compliance.
Supply support for SMA5J7.5CAHM3/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, power density, and automotive qualification.
The SMA5J series is engineered for high-power transient suppression in space-constrained, high-reliability applications-including engine control, infotainment, and industrial fieldbus systems-where consistent clamping and long-term stability are critical.
FAQ
What is the polarity configuration of SMA5J7.5CAHM3/I?
The SMA5J7.5CAHM3/I is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking on the SMA package. Its electrical characteristics-including VBR, VC, and IPPM-are identical in both directions, enabling use on AC-coupled or differential signal lines without orientation constraints. This design eliminates assembly errors and simplifies layout for interfaces like CAN or RS-485.
Does SMA5J7.5CAHM3/I meet AEC-Q101 requirements?
Yes, SMA5J7.5CAHM3/I is fully AEC-Q101 qualified, as confirmed by Vishay's documentation (ordering code suffix HM3_X denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified variants). It undergoes stress testing including high-temperature reverse bias (HTRB), temperature cycling, and ESD per AEC-Q101 Rev D, making it suitable for automotive powertrain and chassis applications.
What is the maximum clamping voltage of SMA5J7.5CAHM3/I under surge conditions?
The SMA5J7.5CAHM3/I clamps to a maximum of 12.9 V when subjected to its rated 100 A peak pulse current (10/1000 μs waveform), as specified in the Vishay datasheet Document Number 88875. This clamping voltage is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMA5J7.5CAHM3/I be used in place of unidirectional TVS diodes?
No-SMA5J7.5CAHM3/I is strictly bidirectional and must not replace unidirectional TVS diodes (e.g., SMA5J7.5A) in DC-biased circuits such as power rail protection. Its symmetrical structure lacks a defined cathode band and conducts in both directions, which would short DC supplies or disrupt bias networks. Use only where bidirectional surge suppression is explicitly required.
What PCB pad layout is recommended for SMA5J7.5CAHM3/I?
Vishay specifies mounting SMA5J7.5CAHM3/I on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 500 W peak pulse power and thermal performance. Smaller pads reduce heat dissipation, causing premature thermal runaway during repeated surges. The recommended layout aligns with IPC-7351B for DO-214AC and ensures compliance with J-STD-020 reflow profiles.
SMA5J7.5CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 38.8A
- Power - Peak Pulse:
- 500W
- 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-214AC (SMA)
SMA5J7.5CAHM3/I FAQ
1.How can I place an order for SMA5J7.5CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/I reliable?
The price and inventory of SMA5J7.5CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J7.5CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMA5J7.5CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J7.5CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J7.5CAHM3/I?
SMA5J7.5CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/I?
For technical support, including SMA5J7.5CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J7.5CAHM3/I requirements.
6.How does Aetrix verify that SMA5J7.5CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMA5J7.5CAHM3/I?
All SMA5J7.5CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/I part is unused and in its original packaging.
Return procedure for SMA5J7.5CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA5J7.5CAHM3/I Tags
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