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Vishay General Semiconductor - Diodes Division TPSMA24HE3/5AT
- Part No.:
- TPSMA24HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA24HE3/5AT.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,876
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Product details
Overview
TPSMA24HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges on power and signal lines. It features a 24 V breakdown voltage (VBR = 22.8–25.2 V), 400 W peak pulse power (10/1000 µs), 33.2 V maximum clamping voltage at 12 A, 1.0 W steady-state power dissipation, and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMA24HE3/5AT datasheet, TPSMA24HE3/5AT pinout, TPSMA24HE3/5AT application, or TPSMA24HE3/5AT equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, AEC-Q101 qualification, TJ = 185 °C capability, and 33.2 V clamping performance under 12 A surge current.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and low incremental surge resistance. Its unidirectional configuration enables robust forward conduction during overvoltage events while maintaining low leakage (<1 µA at 20.5 V) and fast response time for sub-microsecond transient suppression.
The device is rated for 40 A non-repetitive peak forward surge current (8.3 ms half-sine), meets MSL Level 1 per J-STD-020 (260 °C reflow), and is qualified to AEC-Q101 - confirming suitability for automotive-grade PCB-level ESD and surge protection without derating at elevated ambient temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 22.8 V / 24.0 V / 25.2 V - ensures reliable triggering above 20.5 V stand-off voltage with tight tolerance for predictable clamping onset |
| VC @ IPPM | 33.2 V at 12.0 A - limits downstream voltage stress during 400 W transient events on 12 V or 24 V systems |
| PPPM | 400 W (10/1000 µs) - handles automotive load-dump and ISO 7637-2 Pulse 5a/b energy levels |
| TJ max. | +185 °C - supports operation in engine bay or under-hood environments without thermal derating |
| IR @ VWM | <1.0 µA at 20.5 V - minimizes standby power loss and avoids interference in high-impedance sensor circuits |
| Package | SMA (DO-214AC) - industry-standard SMD footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity with cathode band marking. Dimensions per Vishay spec: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), 0.208" × 0.157" × 0.090". Matte tin-plated leads, J-STD-002 solderable, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts when transient exceeds VBR, shunting surge current to ground |
| Anode | Cathode of internal PN junction | Typically tied to system ground or low-impedance return path; completes clamping loop during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Optimized anisotropic rectifier structure enhances long-term reliability under thermal cycling and humidity exposure |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring zero-failure field performance |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 9.2 V) and reduced voltage overshoot during fast-rising transients |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn cracking or delamination |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤33.2 V during 12 A surge, preventing damage to downstream 36 V-rated regulators and microcontrollers. | Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) in factory automation sensors exposed to relay coil flyback. IC Role / Device Role / Timing Role: Standoff-connected TVS across signal and return lines to absorb inductive kickback before it reaches ADC inputs. Use Value: Maintains <1 µA leakage at 20.5 V, avoiding offset error in precision current-loop receivers while clamping spikes within 1 ns. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Guarding PoE-powered Ethernet switch ports against lightning-induced common-mode surges on data pairs. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on each differential pair, referenced to chassis ground. Use Value: Withstands 400 W pulses without degradation, meeting IEC 61000-4-5 Level 3 (1 kV/2 Ω) requirements for telecom infrastructure. | Use Scenario: Safeguarding AC-DC adapter primary-side rectifier outputs against mains overvoltage and capacitor discharge transients. IC Role / Device Role / Timing Role: Mounted across bulk capacitor terminals to clamp voltage excursions during brownout recovery or hot-plug events. Use Value: 185 °C max junction temperature allows placement near heat-generating transformers without thermal runaway risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Same VBR range (22.8–25.2 V), but SMB package (DO-214AA); 600 W PPPM; higher clamping voltage (38.9 V @ 10.3 A) | Higher power handling but larger footprint; less suitable for space-constrained automotive modules | Select when higher surge margin is needed and board area permits SMB layout |
| SMCJ24A | Same VBR, but SMC package (DO-214AB); 1500 W PPPM; clamps at 38.9 V @ 38.9 A | Designed for heavy industrial surge standards (IEC 61000-4-5 Level 4); overqualified for most automotive use cases | Choose only when system-level testing requires >1000 W transient immunity |
Compared with SMBJ24A and SMCJ24A, the TPSMA24HE3/5AT delivers optimal balance of AEC-Q101 compliance, compact SMA footprint, and precise 33.2 V clamping - making it preferred for cost-sensitive, space-limited 24 V automotive and industrial control designs where 400 W surge immunity suffices.
Availability
TPSMA24HE3/5AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom line surge suppression requiring stable component supply and full traceability.
Supply support for TPSMA24HE3/5AT 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The TPSMA24HE3/5AT belongs to Vishay's PAR® (Protected Anisotropic Rectifier) TVS family, engineered specifically for high-temperature, high-reliability transient suppression in harsh environments such as engine compartments and factory floors.
FAQ
What is the maximum clamping voltage of the TPSMA24HE3/5AT under standard test conditions?
The TPSMA24HE3/5AT has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 12.0 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects worst-case voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with 36 V-rated ICs in 24 V systems.
Is the TPSMA24HE3/5AT qualified for automotive applications?
Yes, the TPSMA24HE3/5AT is AEC-Q101 qualified, as confirmed by Vishay's documentation for base part numbers ending in HE3 or HM3. Its 185 °C maximum junction temperature, MSL Level 1 reflow rating, and passivated anisotropic rectifier construction meet stringent automotive reliability requirements for under-hood and powertrain electronics.
What does the "HE3/5AT" suffix indicate in TPSMA24HE3/5AT?
The "HE3" denotes RoHS-compliant, AEC-Q101 qualified construction with matte tin-plated leads; "5AT" specifies tape-and-reel packaging in 7-inch reels with 1800 units per reel. This ordering code aligns with Vishay's preferred package code "H" and delivery mode for automated SMT assembly lines.
Can the TPSMA24HE3/5AT be used in bidirectional configurations?
No, the TPSMA24HE3/5AT is unidirectional only, as explicitly stated in Vishay's datasheet. It conducts only when the cathode is positive relative to the anode. For bidirectional protection (e.g., AC lines or differential data), a separate bidirectional TVS like SMAJ24CA must be selected - the TPSMA24HE3/5AT cannot be repurposed for reverse-polarity clamping.
How does the TPSMA24HE3/5AT perform at elevated ambient temperatures?
The TPSMA24HE3/5AT maintains full 400 W peak pulse power capability up to +125 °C ambient, with linear derating to ~200 W at +175 °C (per Fig. 2 in datasheet 88405). Its 185 °C maximum junction temperature allows safe operation in high-heat zones when mounted on recommended 5.0 mm × 5.0 mm copper pads, unlike many TVS diodes limited to 150 °C.
TPSMA24HE3/5AT 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 11.5A
- 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)
TPSMA24HE3/5AT FAQ
1.How can I place an order for TPSMA24HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA24HE3/5AT 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 TPSMA24HE3/5AT reliable?
The price and inventory of TPSMA24HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA24HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA24HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA24HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA24HE3/5AT?
TPSMA24HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA24HE3/5AT 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 TPSMA24HE3/5AT?
For technical support, including TPSMA24HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA24HE3/5AT requirements.
6.How does Aetrix verify that TPSMA24HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA24HE3/5AT 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 TPSMA24HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA24HE3/5AT?
All TPSMA24HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA24HE3/5AT, 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 TPSMA24HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA24HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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