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Vishay General Semiconductor - Diodes Division TPSMA43AHM3_B/I
- Part No.:
- TPSMA43AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA43AHM3_B/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMA43AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching and lightning-induced transients on power rails and signal lines. It features a 43 V breakdown voltage (VBR), 59.3 V maximum clamping voltage (VC) at 6.7 A peak pulse current, 400 W peak pulse power (10/1000 μs), and operates up to +185 °C junction temperature - deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMA43AHM3_B/I datasheet, TPSMA43AHM3_B/I pinout, TPSMA43AHM3_B/I application, or TPSMA43AHM3_B/I equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and 36.8 V stand-off voltage (VWM) for reliable overvoltage margin in 36 V nominal systems.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions and high-temperature operation. Its 10/1000 μs waveform response supports IEC 61000-4-5 Level 4 compliance when properly mounted on 5.0 mm × 5.0 mm copper pads.
The device exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of fast-rising transients before downstream ICs or MOSFETs are damaged. Its VBR temperature coefficient of +0.092 %/°C ensures predictable voltage drift across the full -65 °C to +185 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 40.9 V / 43.0 V / 45.2 V - defines precise clamping onset threshold at 1 mA test current; enables accurate overvoltage margining against 36 V system rails. |
| VWM | 36.8 V - maximum continuous reverse working voltage; ensures no leakage conduction during normal 36 V nominal operation. |
| VC @ IPPM | 59.3 V at 6.7 A - clamped voltage during 400 W transient; limits stress on protected 48 V-rated components like gate drivers or CAN transceivers. |
| PPPM | 400 W (10/1000 μs) - peak pulse power handling; meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications. |
| TJ max. | +185 °C - extended junction temperature rating; supports under-hood automotive placement and high-reliability industrial environments without derating. |
| Polarity | Unidirectional - protects only against positive transients relative to cathode; requires correct orientation in DC-biased circuits. |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" length and 0.177" width; compatible with automated pick-and-place and reflow. |
Pinout & Package
TPSMA43AHM3_B/I is housed in the SMA (DO-214AC) package: a molded plastic case with matte tin-plated leads, MSL Level 1 rating, and cathode indicated by a color band. The device has two terminals: anode and cathode - no internal circuitry or additional pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground during overvoltage events - must be routed with low-inductance path to GND plane. |
| Anode | Reference/ground return | Typically tied to system ground or low-impedance return path; completes clamping loop - layout must minimize trace inductance to preserve response speed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - required for engine control, ADAS, and body electronics modules. |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-609 Category 1a and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| MSL Level 1 (260 °C peak) | Zero floor life limitation; can be stored indefinitely before reflow - eliminates moisture sensitivity handling overhead in production. |
| 185 °C junction capability | Enables placement near heat sources (e.g., power converters, motor drivers) without thermal derating - reduces need for remote mounting or heatsinking. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during surge events - critical for protecting 48 V tolerant components such as ISO 11898-2 transceivers or SiC gate drivers. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V/36 V battery-fed ECUs and lighting modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Transient voltage suppressor placed at input filter stage, clamping surges before DC/DC converters and microcontrollers. Use Value: Withstands 400 W pulses and operates up to +185 °C, enabling direct placement on high-temperature PCB zones near power stages without performance loss. |
Use Scenario: Shielding analog and digital sensor outputs (e.g., pressure, temperature, current sense) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Unidirectional TVS on signal lines between sensors and ADC inputs or isolated RS-485 transceivers. Use Value: 36.8 V VWM allows safe operation with 24 V sensor supplies while clamping fast transients below 59.3 V - preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Device USB/Power Port Protection |
|
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras, access points) against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp at DC jack entry point, upstream of primary DC/DC regulation. Use Value: 43 V VBR provides optimal margin above 48 V nominal with 10% tolerance (43.2 V), ensuring robust clamping without false triggering. |
Use Scenario: Adding surge resilience to USB-C PD ports and external power adapters in laptops, monitors, and docking stations. IC Role / Device Role / Timing Role: Secondary-level TVS on VBUS line after primary fuse and common-mode choke. Use Value: SMA package footprint enables compact layout; halogen-free construction satisfies consumer product environmental mandates without sacrificing 400 W surge capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43AHE3_A/H | Same VBR (40.9–45.2 V), but SMB package (DO-214AA); 600 W PPPM; higher IPPM (10.3 A). | Larger footprint; better suited for higher-energy surges where board space permits. | Select when 600 W surge rating is required and SMB layout is acceptable - not drop-in compatible due to different pad dimensions. |
| TPSMA43AHM3_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 or application difference - purely logistics variant for smaller batch procurement. | Choose based on order volume and assembly line feeder compatibility; same thermal, electrical, and reliability performance as TPSMA43AHM3_B/I. |
Compared with SMBJ43AHE3_A/H and TPSMA43AHM3_B/H, the TPSMA43AHM3_B/I offers identical transient suppression performance in the smaller SMA footprint - ideal for space-constrained automotive and industrial PCBs where 400 W surge immunity suffices and 7500-piece reels optimize SMT line utilization.
Availability
TPSMA43AHM3_B/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for TPSMA43AHM3_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, thermal performance, and automotive-grade validation.
The TPSMA43AHM3_B/I belongs to Vishay's PAR® series of surface-mount TVS diodes - engineered specifically for high-temperature, high-reliability transient suppression in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the maximum clamping voltage of the TPSMA43AHM3_B/I under surge conditions?
The TPSMA43AHM3_B/I has a maximum clamping voltage (VC) of 59.3 V at its rated peak pulse current of 6.7 A (10/1000 μs waveform). This value is measured per IEC 61000-4-5 test conditions and reflects the upper voltage limit imposed on protected circuitry during a 400 W transient event. The TPSMA43AHM3_B/I maintains this clamping performance across its full operating temperature range.
Is the TPSMA43AHM3_B/I AEC-Q101 qualified and what does that mean for automotive use?
Yes, the TPSMA43AHM3_B/I carries AEC-Q101 qualification - confirmed by Vishay's documentation for HM3-suffix parts. This means it has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for automotive powertrain, chassis, and body electronics. The TPSMA43AHM3_B/I is rated for TJ = 185 °C, supporting under-hood deployment without derating.
What is the stand-off voltage (VWM) of the TPSMA43AHM3_B/I and how does it relate to system voltage?
The TPSMA43AHM3_B/I has a stand-off voltage (VWM) of 36.8 V - the maximum DC or continuous reverse voltage it can withstand without significant leakage. This makes it appropriate for 36 V nominal systems (e.g., 48 V automotive architectures with 25% tolerance), providing ~10% margin below VBR (43.0 V typ.) to prevent false triggering during normal operation.
Does the TPSMA43AHM3_B/I have a unidirectional or bidirectional configuration?
The TPSMA43AHM3_B/I is unidirectional - it conducts only during positive transients relative to its cathode terminal. This is clearly specified in Vishay's datasheet under FEATURES and ELECTRICAL CHARACTERISTICS. Bidirectional variants (e.g., TPSMA43CA) exist in the same family but are distinct part numbers; the TPSMA43AHM3_B/I must be oriented correctly in-circuit to protect DC-biased lines.
What package type does the TPSMA43AHM3_B/I use and is it compatible with standard SMT processes?
The TPSMA43AHM3_B/I uses the SMA (DO-214AC) package - a standardized surface-mount outline with 0.208" × 0.177" footprint and matte tin-plated leads. It is rated MSL Level 1 (peak reflow temperature 260 °C) and solderable per J-STD-002 and JESD 22-B102, making it fully compatible with standard lead-free reflow profiles and automated assembly lines.
TPSMA43AHM3_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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 6.7A
- 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)
TPSMA43AHM3_B/I FAQ
1.How can I place an order for TPSMA43AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA43AHM3_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 TPSMA43AHM3_B/I reliable?
The price and inventory of TPSMA43AHM3_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 TPSMA43AHM3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA43AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA43AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA43AHM3_B/I?
TPSMA43AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA43AHM3_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 TPSMA43AHM3_B/I?
For technical support, including TPSMA43AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA43AHM3_B/I requirements.
6.How does Aetrix verify that TPSMA43AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA43AHM3_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 TPSMA43AHM3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA43AHM3_B/I?
All TPSMA43AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA43AHM3_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 TPSMA43AHM3_B/I part is unused and in its original packaging.
Return procedure for TPSMA43AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA43AHM3_B/I Tags
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