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Vishay General Semiconductor - Diodes Division TPSMA30AHM3_B/I
- Part No.:
- TPSMA30AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA30AHM3_B/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,369
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Product details
Overview
TPSMA30AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 30 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 41.4 V maximum clamping voltage at 9.7 A surge current, 1.0 W steady-state power dissipation, and operation up to +185 °C junction temperature - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA30AHM3_B/I datasheet, TPSMA30AHM3_B/I pinout, TPSMA30AHM3_B/I application, or TPSMA30AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, TJ = 185 °C rating, MSL Level 1 moisture sensitivity, and compatibility with 0.2" × 0.2" PCB copper pad layout per JEDEC standards.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs waveform with 0.01% duty cycle, and it exhibits a typical VBR temperature coefficient of +0.088 %/°C.
The device operates as a unidirectional shunt protector: reverse-biased during normal operation with <1.0 µA leakage at 25.6 V (VWM), then rapidly avalanches to clamp transients at ≤41.4 V when exposed to surges exceeding its breakdown threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 28.5 V / 30.0 V / 31.5 V - defines minimum voltage at which avalanche conduction begins under 1 mA test current |
| VWM | 25.6 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 41.4 V at 9.7 A - clamping voltage during 400 W transient, critical for downstream IC voltage margining |
| PPPM | 400 W - peak pulse power handling capability with 10/1000 µs waveform, derated above 25 °C |
| TJ max. | +185 °C - enables use in under-hood automotive and high-ambient industrial environments |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes terminal polarity |
| MSL Level | Level 1 (J-STD-020) - supports standard SMT reflow without baking, peak solder temperature up to 260 °C |
| AEC-Q101 | Qualified - certified for automotive electronic systems per stress test requirements |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during overvoltage events to shunt current to ground |
| Anode (non-banded end) | Cathode of internal PN junction | Typically tied to system ground or lower-potential reference; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier design ensures stable VBR and low leakage across temperature and life |
| High-reliability thermal rating | TJ = 185 °C enables sustained operation in engine control units and motor drive inverters |
| 400 W transient suppression | Handles 10/1000 µs lightning-induced surges per IEC 61000-4-5 without degradation |
| AEC-Q101 qualification | Validated for automotive applications including ADAS sensors and body electronics modules |
| Low clamping ratio | VC/VBR ≈ 1.38 - tight voltage margin preserves headroom for 3.3 V/5 V/12 V logic and analog circuits |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN bus transceivers and LIN interface ICs from load dump and inductive switching transients in vehicle door modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp ESD and ISO 7637-2 pulses. Use Value: Maintains signal integrity below 41.4 V clamping level while surviving repeated 400 W surges per AEC-Q101 stress profile. | Use Scenario: Safeguarding 24 V DC input rails of PLC I/O modules against relay coil flyback and motor drive commutation spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main supply rail, coordinated with upstream fuses and downstream LDOs. Use Value: Enables robust 24 V system design with 185 °C junction rating for convection-cooled enclosures in factory automation. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side transient suppression on 12 V output of AC/DC adapters for smart home hubs and security cameras. IC Role / Device Role / Timing Role: Final-stage clamping device after bulk capacitor, limiting voltage overshoot during hot-plug or short-circuit recovery. Use Value: Prevents latch-up in USB-PD controllers and PMICs by holding output below 41.4 V during 10/1000 µs surges. | Use Scenario: Protecting Ethernet PHY front-end circuitry from induced surges on PoE-powered access points and base stations. IC Role / Device Role / Timing Role: Signal-line TVS on MDI pairs, mounted adjacent to RJ45 connector with controlled trace impedance. Use Value: Meets GR-1089-CORE Level 3 telecom surge immunity with minimal capacitance impact due to DO-214AC geometry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30AHE3_A/H | Same VBR (28.5–31.5 V), identical SMA package, but rated for 400 W with 1.0 W PD and no AEC-Q101 qualification | Targeted at commercial-grade consumer and computing applications, not automotive | Select when AEC-Q101 is not required and cost sensitivity outweighs automotive reliability validation |
| TPSMA30AHM3_B/H | Identical electrical specs and AEC-Q101 qualification; differs only in tape-and-reel packaging (1800 pcs vs. 7500 pcs per reel) | No functional difference; choice depends solely on production volume and SMT line feeder compatibility | Select for smaller batch builds or prototyping where 7" reel integration is preferred |
Compared with SMAJ30AHE3_A/H and TPSMA30AHM3_B/H, the TPSMA30AHM3_B/I offers identical surge performance and automotive qualification but ships in higher-volume 13" reels - enabling longer uninterrupted SMT runs and reduced changeover frequency in high-mix manufacturing.
Availability
TPSMA30AHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power rail clamping, and telecom line interface protection requiring stable component supply, AEC-Q101 compliance, and high-temperature reliability.
Supply support for TPSMA30AHM3_B/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, TVS devices, and optoelectronics with emphasis on reliability and high-temperature performance.
The TPSMA series belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for automotive and industrial applications demanding AEC-Q101 qualification, 185 °C operation, and robust 400 W surge handling in compact SMA packages.
FAQ
What is the maximum clamping voltage of the TPSMA30AHM3_B/I under surge conditions?
The TPSMA30AHM3_B/I has a maximum clamping voltage (VC) of 41.4 V when subjected to its rated peak pulse current of 9.7 A using the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and ensures downstream components remain within safe operating voltage limits during transient events. The clamping performance is guaranteed across the full -65 °C to +185 °C junction temperature range.
Is the TPSMA30AHM3_B/I qualified for automotive applications?
Yes, the TPSMA30AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HM3", which denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. This qualification covers stress tests including HTRB, HTGB, AC/DC life testing, and temperature cycling - making it suitable for under-hood and body electronics in passenger vehicles and commercial fleets.
What does the "HM3" suffix indicate in TPSMA30AHM3_B/I?
The "HM3" suffix in TPSMA30AHM3_B/I identifies the device as halogen-free, RoHS-compliant, and AEC-Q101 qualified - distinguishing it from the "HE3" variant, which is RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both variants share identical electrical specifications and thermal ratings, with HM3 meeting stricter environmental requirements for automotive and green electronics programs.
What is the standoff voltage (VWM) of the TPSMA30AHM3_B/I, and why is it important?
The TPSMA30AHM3_B/I has a maximum working standoff voltage (VWM) of 25.6 V, meaning it remains non-conductive with <1.0 µA leakage up to this reverse voltage. This parameter ensures reliable operation on 24 V systems where nominal rail voltage may reach 28 V during load dump - allowing margin between VWM and actual operating voltage while preventing false triggering during normal conditions.
Does the TPSMA30AHM3_B/I require special PCB layout considerations?
Yes - Vishay specifies that optimal surge performance requires mounting the TPSMA30AHM3_B/I on PCB pads measuring 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal to meet its 400 W rating. Smaller pads reduce thermal mass and increase junction temperature during transients, degrading pulse power capability. The device also requires short, low-inductance traces to ground to minimize clamping voltage overshoot during fast-rising events.
TPSMA30AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 9.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA30AHM3_B/I FAQ
1.How can I place an order for TPSMA30AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA30AHM3_B/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 TPSMA30AHM3_B/I reliable?
The price and inventory of TPSMA30AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA30AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA30AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA30AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA30AHM3_B/I?
TPSMA30AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA30AHM3_B/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 TPSMA30AHM3_B/I?
For technical support, including TPSMA30AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA30AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA30AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA30AHM3_B/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 TPSMA30AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA30AHM3_B/I?
All TPSMA30AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA30AHM3_B/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 TPSMA30AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA30AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA30AHM3_B/I Tags
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