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Vishay General Semiconductor - Diodes Division TPSMA24AHE3_B/I
- Part No.:
- TPSMA24AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA24AHE3_B/I.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,093
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Product details
Overview
TPSMA24AHE3_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 and signal lines. It features a 24.0 V nominal breakdown voltage (VBR), 33.2 V maximum clamping voltage (VC) at 12.0 A peak pulse current, 400 W peak pulse power (10/1000 µs), 185 °C maximum junction temperature, and SMA (DO-214AC) package - deployed in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the TPSMA24AHE3_B/I datasheet, TPSMA24AHE3_B/I pinout, TPSMA24AHE3_B/I application, or TPSMA24AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, 20.5 V stand-off voltage (VWM), low 1.0 µA reverse leakage at VWM, and thermal stability up to +185 °C junction temperature.
Technical Context
This TVS diode operates as a voltage-clamping device in parallel with protected circuitry, triggering when transient voltage exceeds its 24.0 V breakdown threshold. Its passivated anisotropic rectifier technology ensures stable VBR drift (0.085 %/°C) and low incremental surge resistance under repetitive 10/1000 µs surges.
Designed for high-reliability environments, the TPSMA24AHE3_B/I meets MSL Level 1 per J-STD-020 (260 °C peak reflow), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and delivers 3.5 V max forward voltage at 25 A - enabling robust overvoltage protection without compromising forward conduction integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 22.8 V / 24.0 V / 25.2 V - defines precise clamping initiation threshold under 1.0 mA test current |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage rises above 1.0 µA |
| VC @ IPPM | 33.2 V at 12.0 A - clamped voltage during 400 W transient, limiting stress on downstream ICs |
| PPPM | 400 W (10/1000 µs waveform) - peak transient energy absorption capability per pulse |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| Polarity | Unidirectional - protects against positive-going transients only; cathode marked by band |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and 0.074" height |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with matte tin-plated leads, cathode identified by color band; compliant with UL 94 V-0, J-STD-002 solderability, and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient voltage reference node | Connected to protected line; conducts during overvoltage to clamp to VC |
| Anode | Return path to ground or lower potential rail | Completes clamping current path; must be routed with low-inductance connection to reference plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JESD47 |
| 185 °C junction rating | Enables use in engine control units and DC-DC converters without derating in high-ambient zones |
| Low clamping ratio (VC/VBR = 1.38) | Minimizes overvoltage margin between trigger and clamp, improving system-level surge immunity |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking preconditioning |
| 0.085 %/°C VBR tempco | Ensures predictable clamping across -65 °C to +185 °C operating range without calibration |
Applications
| Automotive Sensor Protection | Industrial Power Input Stage |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point, shunting transients before they reach signal conditioning ICs. Use Value: Withstands 400 W surges while maintaining 33.2 V clamping - keeping protected transceivers within absolute maximum ratings. |
Use Scenario: Safeguarding 24 V DC input rails of PLC modules and motor drives against inductive kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage suppression element mounted upstream of bulk capacitors and DC-DC controllers. Use Value: 20.5 V VWM allows full utilization of 24 V nominal rail; 185 °C rating supports operation near heat-generating power components. |
| Consumer Power Adapter Output | Telecom Line Interface |
|
Use Scenario: Secondary-side transient suppression on USB-C PD and AC/DC adapter outputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Fast-response clamping device placed after secondary rectification but before output filter and load switch. Use Value: 12.0 A IPPM and 33.2 V VC limit output overshoot during 10/1000 µs surges, preserving connected devices. |
Use Scenario: Protecting Ethernet PHY interfaces and DSL line drivers from induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Unidirectional TVS applied across differential pairs or single-ended bias lines to absorb common-mode transients. Use Value: Low 1.0 µA leakage at 20.5 V VWM prevents signal distortion; SMA package enables dense layout on high-speed PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Same VBR (24.0 V), higher PPPM (600 W), larger SMB (DO-214AA) package | Requires larger PCB pad area; better suited for higher-energy surges where space permits | Select SMBJ24A if system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows SMB footprint |
| SMCJ24A | Same VBR, 1500 W PPPM, SMC (DO-214AB) package with 2.5× footprint of SMA | Used in primary-side AC/DC inputs or high-power motor drives needing >1 kA surge handling | Choose SMCJ24A only when 400 W is insufficient and mechanical constraints allow larger SMC outline |
Compared with SMBJ24A and SMCJ24A, the TPSMA24AHE3_B/I offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W capability - making it preferred for space-constrained automotive and industrial modules where 185 °C operation is mandatory.
Availability
TPSMA24AHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial power input stages, and consumer power adapter outputs requiring stable component supply with AEC-Q101 compliance and high-temperature reliability.
Supply support for TPSMA24AHE3_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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The TPSMA24AHE3_B/I belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for high-temperature, high-reliability protection in automotive and industrial systems where sustained 185 °C operation is required.
FAQ
What is the maximum clamping voltage of the TPSMA24AHE3_B/I under standard test conditions?
The TPSMA24AHE3_B/I has a maximum clamping voltage (VC) of 33.2 V when subjected to its rated 12.0 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe operating limits during transient events. The TPSMA24AHE3_B/I maintains this performance across its full operating temperature range.
Is the TPSMA24AHE3_B/I qualified for automotive applications?
Yes, the TPSMA24AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD per JESD47 - making it suitable for under-hood and body-control module applications.
What does the "HE3" suffix indicate in TPSMA24AHE3_B/I?
The "HE3" suffix in TPSMA24AHE3_B/I identifies a RoHS-compliant, AEC-Q101 qualified version with matte tin-plated leads that meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements. The "B/I" denotes revision B in 13-inch tape-and-reel packaging (7500 units per reel), per Vishay's ordering information table.
How does the TPSMA24AHE3_B/I compare to bidirectional TVS diodes?
The TPSMA24AHE3_B/I is unidirectional and protects only against positive-going transients on the cathode side - unlike bidirectional types that guard both polarities. Its 20.5 V VWM and 24.0 V VBR make it ideal for DC power rails and single-polarity signal lines. Bidirectional alternatives would require higher VWM to avoid false triggering, reducing usable headroom on 24 V systems.
What is the thermal derating behavior of the TPSMA24AHE3_B/I above 25 °C ambient?
The TPSMA24AHE3_B/I follows standard derating curves per Figure 2 in its datasheet: peak pulse power decreases linearly above 25 °C ambient, reaching ~50 % of 400 W at 125 °C junction temperature. Its 185 °C TJmax allows continued operation in high-ambient environments when PCB copper pad area and airflow are optimized per Vishay's recommended layout.
TPSMA24AHE3_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):
- 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_B/I FAQ
1.How can I place an order for TPSMA24AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA24AHE3_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 TPSMA24AHE3_B/I reliable?
The price and inventory of TPSMA24AHE3_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 TPSMA24AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA24AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA24AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA24AHE3_B/I?
TPSMA24AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA24AHE3_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 TPSMA24AHE3_B/I?
For technical support, including TPSMA24AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA24AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA24AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA24AHE3_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 TPSMA24AHE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA24AHE3_B/I?
All TPSMA24AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA24AHE3_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 TPSMA24AHE3_B/I part is unused and in its original packaging.
Return procedure for TPSMA24AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA24AHE3_B/I Tags
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