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Vishay General Semiconductor - Diodes Division TPSMB33AHM3_A/H
- Part No.:
- TPSMB33AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB33AHM3_A/H.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,381
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Product details
Overview
TPSMB33AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 33 V nominal breakdown voltage (VBR = 31.4–34.7 V), 600 W peak pulse power (10/1000 µs), 45.7 V maximum clamping voltage at 13.1 A, and operates up to +185 °C junction temperature. It is used in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMB33AHM3_A/H datasheet, TPSMB33AHM3_A/H pinout, TPSMB33AHM3_A/H application, or TPSMB33AHM3_A/H equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification, TJ = 185 °C rating, and clamping performance under 10/1000 µs surge conditions.
Technical Context
This TVS diode employs passivated anisotropic rectifier technology with optimized junction passivation for stable clamping across temperature. Its unidirectional configuration provides low forward voltage (VF = 3.5 V at 50 A) and fast response time to transient events, enabling robust protection of downstream MOSFETs and ICs without compromising normal conduction path integrity.
The device is rated for 75 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits low incremental surge resistance, ensuring predictable voltage limiting during high-energy transients. Its MSL Level 1 moisture sensitivity and matte tin-plated terminals meet J-STD-002 solderability requirements for automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 31.4 V / 33.0 V / 34.7 V - precise breakdown threshold ensures reliable triggering before protected circuit damage |
| VWM | 28.2 V - maximum working voltage allowing safe operation below breakdown in normal conditions |
| VC @ IPPM | 45.7 V at 13.1 A - clamping voltage defines worst-case stress on downstream components during surge |
| PPPM | 600 W (10/1000 µs) - peak energy absorption capacity determines survivability against standard lightning surges |
| TJ max. | +185 °C - enables use in under-hood automotive and high-temperature industrial environments |
| Polarity | Unidirectional - supports DC-biased rail protection with cathode-anode orientation matching schematic flow |
| Package | SMB (DO-214AA) - industry-standard surface-mount footprint with 0.205" × 0.220" pad layout per Vishay outline drawing |
Pinout & Package
TPSMB33AHM3_A/H uses the SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a color band, and MSL Level 1 rating. Dimensions are 3.94 mm × 2.20 mm × 1.52 mm (L × W × H), with recommended 5.0 mm × 5.0 mm copper pads per terminal for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to higher-potential side of protected line; reverse-biased during normal operation, avalanches during overvoltage |
| Anode | Cathode of internal PN junction | Connected to ground or lower-potential reference; completes clamping path when cathode-side voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements without compromising thermal or electrical performance |
| 185 °C junction capability | Enables placement near heat sources (e.g., power converters) without derating or thermal shutdown concerns |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected devices compared to higher-ratio TVS solutions |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without preconditioning or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 24 V CAN bus power inputs and LIN transceiver supplies from load dump and alternator ripple. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between battery rail and LDO input to clamp spikes above 33 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V regulators and communication ICs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog outputs of pressure and temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected between 4–20 mA loop output and ground to absorb ESD and cable discharge events. Use Value: Maintains signal integrity below 28.2 V operating voltage while limiting transients to ≤45.7 V for <100 ns. |
| Consumer Power Adapter Input Stage | Telecom DC-DC Converter Input Protection |
Use Scenario: Safeguarding primary-side controllers in universal-input AC/DC adapters against surge coupling from mains. IC Role / Device Role / Timing Role: TVS placed across bulk capacitor input to clamp differential-mode surges induced by nearby switching loads. Use Value: Absorbs 600 W pulses without degradation, preserving capacitor lifetime and preventing controller reset during EN 61000-4-5 testing. |
Use Scenario: Securing isolated 48 V telecom power supplies feeding base station RF amplifiers. IC Role / Device Role / Timing Role: Front-end clamping device on secondary-side 12 V distribution rail to suppress cross-coupled noise from high-speed digital loads. Use Value: Delivers consistent 45.7 V clamping at 13.1 A with <1 ns response, meeting GR-1089-CORE immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33AHE3_A/H | Same SMB package, identical VBR (31.4–34.7 V), but rated for 600 W with 10/1000 µs waveform and AEC-Q101 qualified; differs only in base P/N suffix convention (HE3 vs HM3) | HE3 variant uses standard RoHS-compliant molding compound; HM3 adds halogen-free certification | Select TPSMB33AHM3_A/H when halogen-free compliance is required per IPC-1752 or customer sustainability mandates |
| SMCJ33A | Larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), same 33 V VBR, but rated for 1500 W peak pulse power and 100 A IPPM | Higher power handling suits heavy-duty industrial motor drives where 600 W may be marginal | Choose SMCJ33A only if board space allows larger footprint and system-level surge energy exceeds 600 W capability |
Compared with SMBJ33AHE3_A/H, TPSMB33AHM3_A/H offers identical electrical performance with halogen-free assurance; versus SMCJ33A, it trades higher power for compact SMB footprint-critical for space-constrained automotive ECUs and portable telecom modules.
Availability
TPSMB33AHM3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface clamping, and telecom DC-DC converter input protection requiring stable component supply across production lifecycles.
Supply support for TPSMB33AHM3_A/H 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 high-reliability and automotive-grade products.
The TPSMB series belongs to Vishay's PAR® transient voltage suppressor family, engineered specifically for high-temperature stability and AEC-Q101 compliance in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum clamping voltage of the TPSMB33AHM3_A/H at its rated peak pulse current?
The TPSMB33AHM3_A/H has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 13.1 A, measured using a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88406. The TPSMB33AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the TPSMB33AHM3_A/H suitable for automotive applications?
Yes, the TPSMB33AHM3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It supports junction temperatures up to +185 °C and meets JESD201 Class 2 whisker resistance, making it appropriate for engine control units, body electronics, and ADAS power domains. The TPSMB33AHM3_A/H data sheet confirms qualification status in the Features section.
What does the "HM3" suffix indicate in TPSMB33AHM3_A/H?
The "HM3" suffix in TPSMB33AHM3_A/H denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction per Vishay's ordering nomenclature. It distinguishes this variant from "HE3" (RoHS-compliant and AEC-Q101 qualified but not halogen-free) and confirms compliance with IPC-1752 material declarations. The TPSMB33AHM3_A/H packaging uses environmentally compliant molding compounds without brominated flame retardants.
What is the standoff voltage (VWM) of the TPSMB33AHM3_A/H, and why is it important?
The TPSMB33AHM3_A/H has a maximum standoff voltage (VWM) of 28.2 V, meaning it remains non-conductive under normal operating conditions up to this DC or RMS voltage. This parameter ensures no leakage current or power loss during steady-state operation while providing sufficient margin below the 33 V breakdown threshold. Selecting a VWM ≥10–20% above system nominal voltage prevents false triggering-critical for reliable TPSMB33AHM3_A/H deployment in 24 V automotive systems.
How does the TPSMB33AHM3_A/H compare to the TPSMB33AHE3_A/H in terms of specifications and compliance?
The TPSMB33AHM3_A/H and TPSMB33AHE3_A/H share identical electrical parameters-including VBR, VWM, VC, PPPM, and TJ max.-but differ in environmental compliance: HM3 is halogen-free and RoHS-compliant, whereas HE3 is RoHS-compliant and AEC-Q101 qualified without halogen-free certification. Both use the same SMB package and meet MSL Level 1. The TPSMB33AHM3_A/H is selected when halogen-free materials are mandated by end-customer or regulatory requirements.
TPSMB33AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 13.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
TPSMB33AHM3_A/H FAQ
1.How can I place an order for TPSMB33AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB33AHM3_A/H 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 TPSMB33AHM3_A/H reliable?
The price and inventory of TPSMB33AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB33AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB33AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB33AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB33AHM3_A/H?
TPSMB33AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB33AHM3_A/H 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 TPSMB33AHM3_A/H?
For technical support, including TPSMB33AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB33AHM3_A/H requirements.
6.How does Aetrix verify that TPSMB33AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB33AHM3_A/H 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 TPSMB33AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB33AHM3_A/H?
All TPSMB33AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB33AHM3_A/H, 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 TPSMB33AHM3_A/H part is unused and in its original packaging.
Return procedure for TPSMB33AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB33AHM3_A/H Tags
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