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Vishay General Semiconductor - Diodes Division SMA5J30CAHM3/H
- Part No.:
- SMA5J30CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J30CAHM3/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMA5J30CAHM3/H 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 30 V standoff voltage (VWM), 48.4 V clamping voltage at 10.3 A peak pulse current (IPPM), 500 W peak pulse power (10/1000 µs), and operates across –55 °C to +150 °C junction temperature range - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J30CAHM3/H datasheet, SMA5J30CAHM3/H pinout, SMA5J30CAHM3/H application, or SMA5J30CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, halogen-free RoHS compliance, thermal resistance (RθJA = 80 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture ensures symmetrical clamping in both polarities, with breakdown voltage (VBR) specified between 33.3 V (min) and 36.8 V (max) at 1 mA test current.
Rated for 500 W peak pulse power under standardized 10/1000 µs waveform, it sustains repetitive transients when mounted per recommended pad layout and derates linearly above 25 °C ambient per Fig. 2. The device meets J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VC @ IPPM | 48.4 V - Clamped voltage at 10.3 A peak pulse current; determines protected circuit's maximum transient exposure. |
| PPPM | 500 W - Peak pulse power handling (10/1000 µs); sets energy absorption capacity for lightning or ESD events. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown voltage range at 1 mA; ensures consistent turn-on threshold across production lots. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| RθJA | 80 °C/W - Junction-to-ambient thermal resistance; informs heatsinking needs when operating near power limits. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard reflow profiles up to 260 °C peak. |
Pinout & Package
Two-terminal bidirectional device in SMA (DO-214AC) package; no polarity marking. Terminals are matte tin-plated leads, 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 (unmarked) | Bidirectional surge path | Both terminals function identically; clamps positive or negative transients without polarity dependency. |
| Case (body) | Thermal conduction path | Plastic-molded case provides UL 94 V-0 flammability rating but contributes minimally to heat dissipation; primary thermal path is via leads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness - supports under-hood and ADAS sensor line protection. |
| Halogen-free & RoHS-compliant | Meets IEC 61249-2-21 and JEDEC J-STD-203; eliminates brominated flame retardants while maintaining UL 94 V-0 rating. |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR ≈ 15 V) versus competing TVS devices, reducing stress on downstream ICs like CAN transceivers or ADC front-ends. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life at ≤30 °C/60% RH; no baking required prior to reflow - simplifies SMT line logistics and reduces process risk. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching MCU or signal conditioner. Use Value: Withstands 500 W surges while limiting clamped voltage to 48.4 V - within absolute maximum ratings of 5 V and 3.3 V rail sensors and interface ICs. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage suppression element on dry-contact input stage, coordinated with series current-limiting resistor. Use Value: Fast response (<1 ns) and low VC/VBR ratio ensure transient energy is diverted before damaging optocoupler or Schmitt trigger inputs. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding RS-485 transceiver data lines in base station remote units from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) in hybrid protection scheme; handles residual fast-rising edges. Use Value: 48.4 V clamping aligns with RS-485 common-mode range (–7 V to +12 V), preventing latch-up or permanent damage to transceiver ESD structures. |
Use Scenario: Protecting USB-C and barrel jack inputs in wall adapters against user-handling ESD and AC line coupling events. IC Role / Device Role / Timing Role: Final-stage clamping device on DC output rail, positioned downstream of primary switching regulator and bulk capacitor. Use Value: Halogen-free construction satisfies regional environmental mandates; 30 V VWM accommodates 24 V nominal adapter outputs with safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30CA | Same VWM (30 V), identical SMA package, but rated for 400 W PPPM and higher VC (53.3 V at 9.4 A). | Lower power handling and looser clamping reduce protection margin for high-energy transients like ISO 16750-2 Pulse 5a. | Select SMAJ30CA only if system-level testing confirms 400 W suffices and layout allows higher clamped voltage tolerance. |
| ON Semiconductor 1.5SMC30CA | Same VWM and bidirectional function, but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 80 °C/W. | Superior thermal performance enables sustained surge duty cycles, but 7.11 mm × 6.22 mm footprint increases PCB area by ~70%. | Choose 1.5SMC30CA where thermal management is critical and board space permits larger package. |
Compared with SMAJ30CA and 1.5SMC30CA, the SMA5J30CAHM3/H delivers the highest power density (500 W in SMA), AEC-Q101 qualification for automotive use, and halogen-free compliance - making it optimal for space-constrained, high-reliability designs requiring verified automotive-grade robustness.
Availability
SMA5J30CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for SMA5J30CAHM3/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 is engineered for high-power-density transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of the SMA5J30CAHM3/H at its rated peak pulse current?
The SMA5J30CAHM3/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 10.3 A under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on the minimum recommended pad layout and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA5J30CAHM3/H maintains this clamping performance across its full operating temperature range.
Is the SMA5J30CAHM3/H qualified for automotive applications?
Yes, the SMA5J30CAHM3/H is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in Vishay's official documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD verification per AEC-Q101 standards. This qualification makes the SMA5J30CAHM3/H suitable for under-hood and ADAS-related applications where reliability under thermal and electrical stress is critical.
Does the SMA5J30CAHM3/H have polarity markings on the package?
No, the SMA5J30CAHM3/H does not feature polarity markings because it is a bidirectional TVS diode. Unlike unidirectional variants (e.g., SMA5J30A), which use a cathode band to indicate polarity, the SMA5J30CAHM3/H functions identically in both directions and carries no visual polarity indicator. This design simplifies layout and eliminates orientation errors during automated placement.
What is the thermal resistance of the SMA5J30CAHM3/H, and how does it affect layout?
The SMA5J30CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 80 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking and dictates that PCB copper area must be carefully sized to avoid exceeding the +150 °C maximum junction temperature during repeated surge events. Layouts using smaller pads will exhibit higher RθJA, reducing safe power handling.
How does the "HM3" suffix in SMA5J30CAHM3/H differ from "E3" or "M3"?
"HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction - distinguishing it from "E3" (RoHS-compliant commercial grade) and "M3" (halogen-free RoHS-compliant commercial grade). The "H" prefix specifically signals automotive qualification, while "M3" confirms halogen-free molding compound meeting IEC 61249-2-21. The SMA5J30CAHM3/H thus satisfies both environmental and automotive reliability requirements simultaneously.
SMA5J30CAHM3/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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 10.3A
- 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)
SMA5J30CAHM3/H FAQ
1.How can I place an order for SMA5J30CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J30CAHM3/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 SMA5J30CAHM3/H reliable?
The price and inventory of SMA5J30CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J30CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMA5J30CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J30CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J30CAHM3/H?
SMA5J30CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J30CAHM3/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 SMA5J30CAHM3/H?
For technical support, including SMA5J30CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J30CAHM3/H requirements.
6.How does Aetrix verify that SMA5J30CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMA5J30CAHM3/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 SMA5J30CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMA5J30CAHM3/H?
All SMA5J30CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J30CAHM3/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 SMA5J30CAHM3/H part is unused and in its original packaging.
Return procedure for SMA5J30CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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