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Vishay General Semiconductor - Diodes Division SMA5J7.5CAHM3/H
- Part No.:
- SMA5J7.5CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J7.5CAHM3/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J7.5CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients 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), 12.9 V maximum clamping voltage (VC) at 38.8 A peak pulse current, and 500 W peak pulse power rating with 10/1000 µs waveform. It is halogen-free, RoHS-compliant, and AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMA5J7.5CAHM3/H datasheet, SMA5J7.5CAHM3/H pinout, SMA5J7.5CAHM3/H application, or SMA5J7.5CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.72), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped surge protector using an avalanche breakdown mechanism across both polarities. Its bidirectional symmetry ensures identical electrical characteristics in forward and reverse directions, with no polarity marking required on the SMA package.
It delivers stable transient suppression under repetitive or single-event surges up to 500 W, with thermal resistance of 80 °C/W (junction-to-ambient) and 25 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse voltage before clamping begins; defines operating margin for 5 V–12 V bus protection. |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - Confirmed breakdown threshold range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 12.9 V at 38.8 A - Clamping voltage limits downstream IC stress during 500 W transient; clamping ratio = 1.72. |
| PPPM | 500 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 3/4 surge immunity. |
| TJ max | +150 °C - Maximum junction temperature enables use in under-hood automotive environments without derating. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles (260 °C peak). |
Pinout & Package
SMA (DO-214AC) package: two-terminal, bidirectional device with no polarity marking; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; either terminal may connect to line or ground in AC-coupled or floating systems. |
| Cathode Band (absent) | Non-applicable | Bidirectional construction omits cathode band marking per datasheet specification for CA-suffix devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions enables protection of AC signals, differential buses, and ungrounded power rails without polarity constraints. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-supports use in ADAS, infotainment, and body control modules. |
| Halogen-free & RoHS | HM3 suffix confirms halogen-free molding compound and lead-free terminations, meeting automotive OEM environmental requirements (e.g., GMW3172, Ford WSS-M99P9999-A1). |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60% RH; eliminates bake-out requirement prior to reflow, reducing manufacturing cost and risk of moisture-induced popcorning. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins from load dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Voltage clamping element placed between power rail and ground, responding within <1 ns to transients exceeding 7.5 V. Use Value: Limits induced surge voltage to ≤12.9 V, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive MCUs and transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs from ESD and switching noise on 24 V supply lines. IC Role / Device Role / Timing Role: Bidirectional shunt protector across sensor VCC and GND, absorbing ±1 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity by clamping transients before they couple into sensitive ADC inputs, preserving measurement accuracy. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding RS-485 transceivers in outdoor telecom base stations exposed to lightning-induced surges on twisted-pair data lines. IC Role / Device Role / Timing Role: Common-mode TVS placed across differential pair and chassis ground, leveraging symmetrical bidirectional response. Use Value: Withstands 500 W surges per IEC 61000-4-5 (10/1000 µs), ensuring >100,000 surge cycles without degradation in harsh outdoor environments. |
Use Scenario: Integrated ESD protection for USB 2.0 D+/D− lines in smart home hubs, where space-constrained layouts require minimal component count. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 100 pF at 0 V) placed directly at connector, minimizing stub length. Use Value: Provides ±15 kV air/±8 kV contact ESD immunity per IEC 61000-4-2 while adding <0.5 pF parasitic capacitance to high-speed signal path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J7.5CAHE3/H | Same electrical specs and AEC-Q101 qualification, but RoHS-compliant without halogen-free compound (E3 vs HM3). | Approved for commercial-automotive hybrids; not accepted by OEMs mandating halogen-free materials (e.g., BMW GS95024-3). | Select SMA5J7.5CAHE3/H only if halogen content is unrestricted and cost is prioritized over full OEM compliance. |
| SMA6J7.5CAHM3/H | Higher 600 W PPPM, same VWM/VC, larger SMA package variant (DO-214AC with thicker leads); identical pinout and footprint. | Supports higher-energy surges (e.g., ISO 7637-2 Pulse 5a) but requires revised thermal pad layout for 600 W dissipation. | Choose SMA6J7.5CAHM3/H when system-level surge testing exceeds 500 W requirements and board space allows for enhanced thermal relief. |
Compared with SMA5J7.5CAHE3/H, the SMA5J7.5CAHM3/H adds halogen-free compliance for strict automotive OEMs; compared with SMA6J7.5CAHM3/H, it trades 100 W pulse power headroom for tighter thermal design margins and lower cost in volume production.
Availability
SMA5J7.5CAHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom data line protection, and consumer USB port ESD protection requiring stable component supply across multi-year production cycles.
Supply support for SMA5J7.5CAHM3/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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMA5J series targets high-power-density transient suppression in space-constrained applications, with design focus on AEC-Q101 compliance, automated assembly compatibility, and robust clamping performance across automotive, industrial, and telecom environments.
FAQ
What is the clamping voltage of the SMA5J7.5CAHM3/H under maximum rated surge current?
The SMA5J7.5CAHM3/H has a maximum clamping voltage (VC) of 12.9 V when subjected to its peak pulse current (IPPM) of 38.8 A using a 10/1000 µs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 88875) and reflects worst-case voltage seen by protected circuitry during surge events. The SMA5J7.5CAHM3/H maintains this clamping performance across its full operating temperature range.
Is the SMA5J7.5CAHM3/H suitable for automotive applications?
Yes, the SMA5J7.5CAHM3/H 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 junction temperatures up to +150 °C and tested for thermal cycling, highly accelerated life testing, and ESD immunity. The SMA5J7.5CAHM3/H is approved for use in engine control units, body electronics, and ADAS subsystems per Vishay's qualification report.
Does the SMA5J7.5CAHM3/H have polarity markings on the package?
No, the SMA5J7.5CAHM3/H does not feature a cathode band or any polarity marking because it is a bidirectional TVS diode. As confirmed in the Vishay datasheet, "no marking on bidirectional types" applies to all CA-suffix variants including SMA5J7.5CAHM3/H. Both terminals are functionally identical, allowing flexible placement in AC-coupled or floating circuits without orientation constraints.
What is the moisture sensitivity level (MSL) of the SMA5J7.5CAHM3/H?
The SMA5J7.5CAHM3/H meets MSL Level 1 per J-STD-020, with a maximum lead finish temperature of 260 °C. This means it has unlimited floor life at ≤30 °C/60% RH and requires no baking prior to reflow soldering. The MSL Level 1 rating is verified in Vishay's packaging documentation and supports high-yield, low-risk SMT assembly in high-volume manufacturing environments.
How does the SMA5J7.5CAHM3/H differ from unidirectional variants like SMA5J7.5A?
The SMA5J7.5CAHM3/H is bidirectional with symmetric clamping in both polarities, whereas SMA5J7.5A is unidirectional and features a cathode band. Electrically, SMA5J7.5CAHM3/H has identical VWM, VBR, and VC values in forward and reverse directions, enabling protection of AC signals and floating grounds. In contrast, SMA5J7.5A conducts only in reverse bias and must be oriented correctly in DC circuits. The SMA5J7.5CAHM3/H also omits polarity marking and supports different surge test configurations.
SMA5J7.5CAHM3/H 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/H FAQ
1.How can I place an order for SMA5J7.5CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/H reliable?
The price and inventory of SMA5J7.5CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J7.5CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J7.5CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J7.5CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J7.5CAHM3/H?
SMA5J7.5CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/H?
For technical support, including SMA5J7.5CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J7.5CAHM3/H requirements.
6.How does Aetrix verify that SMA5J7.5CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J7.5CAHM3/H?
All SMA5J7.5CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J7.5CAHM3/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 SMA5J7.5CAHM3/H part is unused and in its original packaging.
Return procedure for SMA5J7.5CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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