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Vishay General Semiconductor - Diodes Division TPSMA15AHM3_B/I
- Part No.:
- TPSMA15AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA15AHM3_B/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,508
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Product details
Overview
TPSMA15AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 15.0 V nominal breakdown voltage (VBR), 12.8 V stand-off voltage (VWM), 21.2 V maximum clamping voltage (VC) at 5.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - used in automotive sensor protection and industrial power rail surge suppression.
For engineers reviewing the TPSMA15AHM3_B/I datasheet, TPSMA15AHM3_B/I pinout, TPSMA15AHM3_B/I application, or TPSMA15AHM3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, MSL Level 1 moisture sensitivity, 1.0 W steady-state power dissipation, and compatibility with high-reliability PCB layouts using 5.0 mm × 5.0 mm copper pads per terminal.
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 test condition, with derating above 25 °C per Figure 2 of the datasheet and thermal coefficient αT = 0.076 %/°C for VBR.
The device is rated for non-repetitive surge events only, with IPPM = 5.0 A at VC = 21.2 V, and exhibits fast response time (<1 ns) due to its avalanche breakdown mechanism. It meets JESD201 Class 2 whisker resistance and is halogen-free, RoHS-compliant, and AEC-Q101 qualified - confirmed by HM3 suffix and ordering code structure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 14.3 V / 15.0 V / 15.8 V - ensures reliable avalanche initiation above system operating voltage |
| VWM | 12.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA |
| VC @ IPPM | 21.2 V at 5.0 A - clamps transient energy to protect downstream ICs and MOSFETs |
| PPPM | 400 W (10/1000 µs) - handles lightning-induced surges and inductive switching spikes |
| TJ max. | +185 °C - supports under-hood automotive and high-ambient industrial environments |
| Polarity | Unidirectional - protects against positive-going transients only; cathode band denotes polarity |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with standard reflow profiles (MSL Level 1, 260 °C peak) |
Pinout & Package
Package: SMA (DO-214AC), molded case with matte tin-plated leads, UL 94 V-0 flammability rating, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode reference for reverse-biased clamping | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Return path for surge current | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements without compromising surge performance |
| 185 °C junction capability | Enables placement near heat sources (e.g., power converters, motor drivers) without derating |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage stress on protected components during transient events |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking preconditioning |
Applications
| Automotive Sensor Protection | Industrial Power Rail Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp positive transients. Use Value: Prevents latch-up or permanent damage to 12 V–24 V automotive ICs while maintaining signal integrity below 12.8 V normal operation. | Use Scenario: Safeguarding 24 V DC input rails in PLC modules and motor control units against inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing surge energy before it reaches upstream regulators or microcontrollers. Use Value: Limits peak rail voltage to ≤21.2 V during 400 W transients, preserving 24 V system margin and avoiding brownout resets. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side surge protection in AC/DC adapters for USB-C PD and smart home hubs exposed to mains-coupled noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V output rail to suppress conducted EFT and surge events per IEC 61000-4-5. Use Value: Maintains regulated output within specification during 1 kV/2 kA surges, eliminating need for additional filtering stages. | Use Scenario: Overvoltage protection on Ethernet PHY power pins and auxiliary bias rails in VoIP gateways and base station backhaul interfaces. IC Role / Device Role / Timing Role: Fast-response clamping device on 3.3 V or 5 V supply lines feeding sensitive transceiver ICs. Use Value: Responds in <1 ns to clamp transients before damaging PHY internal ESD structures, validated per AEC-Q101 stress conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15AHE3_A/H | Same VBR (14.3–15.8 V), same SMA package, but HE3 suffix indicates RoHS/AEC-Q101 without halogen-free claim | Identical clamping performance; differs only in material compliance (halogen content) | Select if halogen-free requirement is not mandated; otherwise TPSMA15AHM3_B/I preferred for strict automotive specs |
| 1.5SMC15A | Larger SMC (DO-214AB) package, higher thermal mass, same electrical specs but 1.5 kW PPPM rating | Used where board space allows larger footprint and higher single-pulse energy handling is needed | Choose when surge duty cycle exceeds 0.01% or layout permits larger pad area; not drop-in compatible due to footprint mismatch |
Compared with SMAJ15AHE3_A/H and 1.5SMC15A, the TPSMA15AHM3_B/I offers halogen-free construction and tighter MSL Level 1 process control in the same SMA footprint, making it optimal for space-constrained, high-reliability automotive modules requiring full AEC-Q101 traceability.
Availability
TPSMA15AHM3_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 across production lifecycles.
Supply support for TPSMA15AHM3_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® (Protected Avalanche Rectifier) family, engineered specifically for robust transient suppression in harsh environments including automotive under-hood, industrial automation, and telecom infrastructure.
FAQ
What is the maximum clamping voltage of the TPSMA15AHM3_B/I at its rated peak pulse current?
The TPSMA15AHM3_B/I has a maximum clamping voltage (VC) of 21.2 V at 5.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform condition. This value is measured per Figure 3 in the datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The TPSMA15AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the TPSMA15AHM3_B/I suitable for automotive applications?
Yes, the TPSMA15AHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix, confirming halogen-free, RoHS-compliant, and automotive-grade reliability validation. It supports junction temperatures up to +185 °C and meets JESD201 Class 2 whisker resistance - making the TPSMA15AHM3_B/I appropriate for engine control units, body electronics, and ADAS sensor modules.
What does the "B/I" suffix in TPSMA15AHM3_B/I indicate?
The "B/I" suffix in TPSMA15AHM3_B/I specifies revision level "B" and packaging format "I", meaning 13-inch diameter plastic tape and reel with 7500 units per reel. This matches Vishay's ordering convention where "H" denotes 7-inch reels (1800 units) and "I" denotes 13-inch reels (7500 units), both compliant with EIA-481 standards.
How does the TPSMA15AHM3_B/I differ from the HE3-suffixed version?
The TPSMA15AHM3_B/I uses halogen-free molding compound and meets stricter material compliance requirements versus the HE3-suffixed variant, which is RoHS- and AEC-Q101-compliant but not halogen-free. Both share identical electrical characteristics and SMA package dimensions, but the TPSMA15AHM3_B/I is specified for applications requiring full halogen-free certification such as certain Tier 1 automotive programs.
What is the standoff voltage (VWM) of the TPSMA15AHM3_B/I and why is it important?
The standoff voltage (VWM) of the TPSMA15AHM3_B/I is 12.8 V - the maximum continuous reverse voltage it can withstand without exceeding 1 μA leakage current. This parameter ensures the TPSMA15AHM3_B/I remains non-conductive during normal operation, preventing power loss or interference while remaining ready to clamp transients exceeding this threshold.
TPSMA15AHM3_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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 18.9A
- 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)
TPSMA15AHM3_B/I FAQ
1.How can I place an order for TPSMA15AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA15AHM3_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 TPSMA15AHM3_B/I reliable?
The price and inventory of TPSMA15AHM3_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 TPSMA15AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA15AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA15AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA15AHM3_B/I?
TPSMA15AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA15AHM3_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 TPSMA15AHM3_B/I?
For technical support, including TPSMA15AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA15AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA15AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA15AHM3_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 TPSMA15AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA15AHM3_B/I?
All TPSMA15AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA15AHM3_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 TPSMA15AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA15AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA15AHM3_B/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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