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Vishay General Semiconductor - Diodes Division TPSMA36AHE3_B/I
- Part No.:
- TPSMA36AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA36AHE3_B/I.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
TPSMA36AHE3_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 36.0 V nominal breakdown voltage (VBR), 30.8 V stand-off voltage (VWM), 400 W peak pulse power (10/1000 µs), 8.0 A peak pulse current (IPPM), and 49.9 V maximum clamping voltage (VC) - used to protect automotive-grade MOSFETs and sensor interfaces against lightning-induced surges and inductive switching spikes.
For engineers reviewing the TPSMA36AHE3_B/I datasheet, TPSMA36AHE3_B/I pinout, TPSMA36AHE3_B/I application, or TPSMA36AHE3_B/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 185 °C junction temperature rating, low clamping ratio (VC/VBR = 1.39), and RoHS-compliant matte tin-plated terminals suitable for J-STD-002 soldering.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable performance under high-temperature stress. Its unidirectional architecture provides forward conduction only during overvoltage events, enabling precise clamping without reverse leakage degradation at VWM.
Rated for 400 W peak pulse power per 10/1000 µs waveform and 40 A non-repetitive surge current (8.3 ms half-sine), it operates across -65 °C to +185 °C junction temperature range and meets MSL Level 1 (260 °C reflow peak), supporting automotive and industrial PCB assembly requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 34.2 V / 36.0 V / 37.8 V - defines precise voltage threshold at which avalanche conduction begins under 1 mA test current |
| VWM | 30.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA, ensuring no false triggering in normal operation |
| VC @ IPPM | 49.9 V - clamped voltage seen by protected circuit during full 8.0 A transient, limiting stress on downstream ICs |
| PPPM | 400 W - peak transient energy absorption capability using standard 10/1000 µs waveform, validated per ANSI/IEEE C62.35 |
| TJ max. | +185 °C - enables reliable operation in under-hood automotive environments and high-power industrial enclosures |
| Polarity | Unidirectional - blocks reverse current until VBR exceeded, then clamps positive transients to cathode side |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with 0.208" x 0.157" footprint and 0.078" lead spacing |
Pinout & Package
SMA (DO-214AC) package with axial leads: cathode indicated by color band; anode and cathode terminals are coplanar, matte tin plated, and compliant with J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient voltage reference node | Connected to protected line; conducts avalanche current when line voltage exceeds VBR, shunting surge to ground |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Junction passivation | Reduces surface leakage and improves long-term reliability under humidity and thermal cycling conditions |
| Low clamping ratio (VC/VBR) | 1.39 - minimizes overvoltage margin between clamp and protected device's absolute maximum rating |
| MSL Level 1 | Supports unlimited floor life and single-reflow at 260 °C peak, eliminating bake requirements prior to SMT assembly |
| 185 °C TJ rating | Enables use in engine control units, DC-DC converters, and motor drivers where ambient temperatures exceed 125 °C |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges up to ISO 7637-2 Pulse 5a. Use Value: Withstands 400 W pulses and maintains VC ≤ 49.9 V, preventing damage to 36 V-rated power management ICs. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector entry point to suppress ESD and cable discharge events. Use Value: 1.0 μA leakage at 30.8 V ensures minimal signal offset drift in precision 4–20 mA loops. |
| Telecom DC Power Input Protection | Consumer USB-C Port Surge Suppression |
|
Use Scenario: Safeguarding PoE-powered switches against induced surges on 48 V DC input rails. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC bus, coordinated with upstream MOVs and fuses. Use Value: 8.0 A IPPM and 49.9 V VC ensure compliance with IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing. |
Use Scenario: Adding robustness to USB-C receptacles exposed to accidental hot-plug and static discharge. IC Role / Device Role / Timing Role: Unidirectional TVS placed on VBUS line to absorb ±15 kV contact ESD per IEC 61000-4-2. Use Value: AEC-Q101 qualification and 185 °C rating support extended lifetime in thermally constrained portable enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Same VBR (36.0 V) and PPPM (400 W), but SMB (DO-214AA) package - 20 % larger footprint and 0.15 mm higher profile | Less suitable for ultra-dense layouts; requires revised pad stack and stencil aperture | Select when board space allows larger package and legacy SMB footprint compatibility is required |
| SMCJ36A | Higher PPPM (1500 W), same VBR, but SMC (DO-214AB) package - 3× larger size and 2.5× higher thermal mass | Used where multi-pulse immunity or sustained surge handling is critical, e.g., AC mains inputs | Choose only if 400 W is insufficient; otherwise, TPSMA36AHE3_B/I offers better layout efficiency and cost-per-protection |
Compared with SMBJ36A and SMCJ36A, the TPSMA36AHE3_B/I delivers identical electrical protection in the smallest standardized surface-mount TVS outline (SMA), enabling higher board density and lower assembly cost while maintaining AEC-Q101 qualification and 185 °C operation.
Availability
TPSMA36AHE3_B/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for TPSMA36AHE3_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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The TPSMA36AHE3_B/I belongs to Vishay's PAR® family of transient voltage suppressors, engineered specifically for high-temperature stability, AEC-Q101 compliance, and repeatable clamping performance in harsh electromagnetic environments.
FAQ
What is the maximum clamping voltage of the TPSMA36AHE3_B/I under rated surge conditions?
The TPSMA36AHE3_B/I has a maximum clamping voltage (VC) of 49.9 V when subjected to its rated 8.0 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on PCBs with 0.2" × 0.2" copper pads per terminal, and represents the upper limit of voltage imposed on the protected circuit during transient suppression. The TPSMA36AHE3_B/I maintains this clamping performance across its full operating temperature range.
Is the TPSMA36AHE3_B/I qualified for automotive applications?
Yes, the TPSMA36AHE3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for base part numbers ending in HE3 or HM3. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling to validate reliability in automotive environments. The "HE3" suffix in TPSMA36AHE3_B/I explicitly denotes RoHS-compliant and AEC-Q101 qualified construction.
What is the difference between TPSMA36AHE3_B/I and TPSMA36AHM3_B/I?
The TPSMA36AHE3_B/I uses matte tin-plated leads and meets JESD 201 Class 2 whisker resistance, while the TPSMA36AHM3_B/I adds halogen-free molding compound in addition to RoHS compliance and AEC-Q101 qualification. Both share identical electrical specifications, package dimensions, and thermal ratings. The choice depends on material compliance requirements: HE3 suffices for standard RoHS, whereas HM3 is required where halogen-free content is mandated.
Does the TPSMA36AHE3_B/I have bidirectional polarity?
No, the TPSMA36AHE3_B/I is unidirectional only, as stated in the Vishay datasheet. It conducts avalanche current when the cathode-to-anode voltage exceeds the 36.0 V nominal breakdown voltage, but blocks reverse current below VWM = 30.8 V. For bidirectional protection, a separate device such as TPSMA36CA would be required - the TPSMA36AHE3_B/I is not rated or characterized for symmetrical clamping.
What is the thermal resistance junction-to-ambient (RθJA) for the TPSMA36AHE3_B/I?
Vishay does not publish a specific RθJA value for the TPSMA36AHE3_B/I in the provided datasheet. Thermal performance is defined via derating curves (Figure 2) and maximum power dissipation (PD = 1.0 W at TA = 25 °C). Actual RθJA depends heavily on PCB layout - the datasheet specifies that ratings assume mounting on 0.2" × 0.2" copper pads per terminal. For thermal modeling, users should apply the published derating curve rather than assuming a fixed RθJA.
TPSMA36AHE3_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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 8A
- 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)
TPSMA36AHE3_B/I FAQ
1.How can I place an order for TPSMA36AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA36AHE3_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 TPSMA36AHE3_B/I reliable?
The price and inventory of TPSMA36AHE3_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 TPSMA36AHE3_B/I is usually 5 days.
3.What payment methods are accepted for TPSMA36AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA36AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA36AHE3_B/I?
TPSMA36AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA36AHE3_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 TPSMA36AHE3_B/I?
For technical support, including TPSMA36AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA36AHE3_B/I requirements.
6.How does Aetrix verify that TPSMA36AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All TPSMA36AHE3_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 TPSMA36AHE3_B/I meets industry standards.
7.What is the process for return or replacement of TPSMA36AHE3_B/I?
All TPSMA36AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA36AHE3_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 TPSMA36AHE3_B/I part is unused and in its original packaging.
Return procedure for TPSMA36AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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