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Vishay General Semiconductor - Diodes Division TPSMA24AHE3/5AT
- Part No.:
- TPSMA24AHE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA24AHE3/5AT.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,263
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Product details
Overview
TPSMA24AHE3/5AT 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 24 V nominal breakdown voltage (VBR = 22.8–25.2 V at IT = 1.0 mA), 33.2 V maximum clamping voltage (VC) at 12.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), 1.0 W steady-state power dissipation, and operates up to TJ = +185 °C - ideal for automotive power rail protection.
For engineers reviewing the TPSMA24AHE3/5AT datasheet, TPSMA24AHE3/5AT pinout, TPSMA24AHE3/5AT application, or TPSMA24AHE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, thermal derating above 25 °C, and compatibility with standard SMA PCB footprints for ESD/surge protection in harsh-environment electronics.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping across temperature, with a positive temperature coefficient of VBR (+0.085 %/°C) enabling predictable voltage shift under thermal stress. Its junction design supports high-reliability operation up to +185 °C, meeting automotive-grade thermal endurance requirements without derating loss at elevated ambient temperatures.
The device responds within picoseconds to transient overvoltages and exhibits low incremental surge resistance, ensuring minimal overshoot during fast-rising surges such as those from inductive switching or ESD events. Its unidirectional configuration provides forward conduction path only when reverse-biased beyond VBR, making it suitable for DC-biased lines where forward voltage drop must be minimized during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 22.8 V / 24.0 V / 25.2 V at IT = 1.0 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 33.2 V at 12.0 A - peak clamped voltage during 400 W 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability per JEDEC-standard waveform, critical for lightning/inductive spike immunity |
| TJ max. | +185 °C - enables use in under-hood automotive modules and industrial power supplies without thermal derating penalties |
| Polarity | Unidirectional - allows integration on DC-biased lines with controlled forward conduction behavior |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline compatible with automated assembly and IPC-7351B footprint |
Pinout & Package
TPSMA24AHE3/5AT is housed in an SMA (DO-214AC) plastic package with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The cathode is marked by a color band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point during clamping | Connected to lower-potential side of protected line; conducts during reverse transient to clamp voltage |
| Cathode | Reverse-biased terminal during normal operation | Connected to higher-potential side (e.g., VCC rail); determines polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable leakage and breakdown characteristics over lifetime and temperature cycling |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units and ADAS power domains |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving system-level robustness |
| 10/1000 µs waveform rating | Matches real-world surge profiles from load dump, relay bounce, and lightning-induced coupling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power lines and LIN transceivers against load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between VBAT and ground, absorbing energy from >100 V transients. Use Value: Maintains VC ≤ 33.2 V during 12 A surges, preventing damage to 36 V-rated CAN PHYs and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Standoff protector on 24 V sensor supply line, activated only during overvoltage events exceeding 20.5 V. Use Value: Limits leakage to ≤1.0 µA at 20.5 V, preserving measurement accuracy while clamping 400 W transients. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Driver Protection |
Use Scenario: Shielding PoE-powered equipment front-end regulators from induced surges on 48 V DC input derived from Ethernet cables. IC Role / Device Role / Timing Role: Primary surge suppression stage before DC/DC converter input, rated for repetitive 0.01 % duty cycle pulses. Use Value: Sustains 400 W peak power without degradation, supporting compliance with IEC 61000-4-5 Level 3 testing. | Use Scenario: Guarding H-bridge gate drivers in washing machine motor controllers against back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Fast-response clamp across motor supply rails, triggered by sub-100 ns transients from inductive kickback. Use Value: Achieves <1 ns response time and clamps at 33.2 V, preventing MOSFET avalanche failure during repeated switching cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same SMA package, 24 V VBR, but rated for 400 W with 1.0 mA test current and 38.9 V VC @ 10.3 A - higher clamping voltage than TPSMA24AHE3/5AT | Higher VC reduces margin for 36 V-rated downstream components | Select TPSMA24AHE3/5AT when tighter clamping (<33.2 V) is required for sensitive 24 V systems |
| 1.5SMC24A | Larger SMC (DO-214AB) package, same 24 V VBR, 400 W rating, but VC = 38.9 V @ 10.3 A and TJ max = +175 °C - less thermal headroom | Not suitable for space-constrained layouts requiring SMA footprint | Choose TPSMA24AHE3/5AT for compact designs needing AEC-Q101 qualification and +185 °C operation |
Compared with SMAJ24A and 1.5SMC24A, TPSMA24AHE3/5AT delivers superior clamping performance (33.2 V vs. ≥38.9 V), extended junction temperature capability (+185 °C), and AEC-Q101 validation - making it optimal for automotive and high-reliability industrial deployments where voltage margin and thermal resilience are critical.
Availability
TPSMA24AHE3/5AT 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 across production lifecycles.
Supply support for TPSMA24AHE3/5AT 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 qualification.
The TPSMA24AHE3/5AT belongs to Vishay's PAR® series of surface-mount TVS diodes, engineered specifically for high-temperature stability and repeatable clamping in mission-critical automotive and industrial power systems.
FAQ
What is the breakdown voltage tolerance for TPSMA24AHE3/5AT?
The TPSMA24AHE3/5AT has a specified breakdown voltage range of 22.8 V to 25.2 V at IT = 1.0 mA, representing ±5 % tolerance around the nominal 24 V value. This tight distribution ensures consistent clamping behavior across production lots and supports reliable overvoltage threshold setting in safety-critical circuits.
Is TPSMA24AHE3/5AT RoHS-compliant and halogen-free?
Yes, TPSMA24AHE3/5AT carries the HE3 suffix, indicating RoHS-compliance per EU Directive 2011/65/EU. However, it is not halogen-free; for halogen-free versions, the HM3 suffix (e.g., TPSMA24AHM3/5AT) must be selected, which also meets JESD201 Class 2 whisker resistance requirements.
What is the maximum clamping voltage of TPSMA24AHE3/5AT under surge conditions?
The TPSMA24AHE3/5AT exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its rated 12.0 A peak pulse current (IPPM) using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream component voltage margin analysis.
Does TPSMA24AHE3/5AT require special PCB layout considerations?
Yes - to achieve rated 400 W pulse power, TPSMA24AHE3/5AT must be mounted on PCB pads of at least 0.2" × 0.2" (5.0 mm × 5.0 mm) copper area per terminal, per Vishay's thermal derating guidelines. Smaller pads reduce surge current handling and may cause premature failure under repeated transients.
How does the temperature coefficient affect TPSMA24AHE3/5AT's breakdown voltage?
The TPSMA24AHE3/5AT has a positive temperature coefficient of +0.085 %/°C for VBR, meaning its breakdown voltage increases linearly with junction temperature. At +125 °C, VBR rises by approximately 8.5 % above its 25 °C value - a key factor when designing for worst-case clamping in high-ambient environments.
TPSMA24AHE3/5AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA24AHE3/5AT FAQ
1.How can I place an order for TPSMA24AHE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA24AHE3/5AT 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 TPSMA24AHE3/5AT reliable?
The price and inventory of TPSMA24AHE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA24AHE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA24AHE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA24AHE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA24AHE3/5AT?
TPSMA24AHE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA24AHE3/5AT 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 TPSMA24AHE3/5AT?
For technical support, including TPSMA24AHE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA24AHE3/5AT requirements.
6.How does Aetrix verify that TPSMA24AHE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA24AHE3/5AT 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 TPSMA24AHE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA24AHE3/5AT?
All TPSMA24AHE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA24AHE3/5AT, 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 TPSMA24AHE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA24AHE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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