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Vishay General Semiconductor - Diodes Division TPSMB22AHE3/5BT
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- Part No.:
- TPSMB22AHE3/5BT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB22AHE3/5BT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,370
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Product details
Overview
TPSMB22AHE3/5BT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1 mA), 18.8 V stand-off voltage (VWM), 30.6 V clamping voltage (VC) at 19.6 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates up to +185 °C junction temperature - ideal for automotive power rail protection.
For engineers reviewing the TPSMB22AHE3/5BT datasheet, TPSMB22AHE3/5BT pinout, TPSMB22AHE3/5BT application, or TPSMB22AHE3/5BT equivalent, key selection criteria include unidirectional polarity, SMB package thermal and mechanical compatibility, AEC-Q101 qualification status, clamping performance under 10/1000 µs surge, and high-temperature reliability in engine control units and ADAS sensor interfaces.
Technical Context
The TPSMB22AHE3/5BT uses passivated anisotropic rectifier technology with optimized junction passivation for stable breakdown behavior across temperature. Its 185 °C maximum junction temperature and MSL Level 1 rating support reflow soldering at 260 °C peak and long-term operation in under-hood automotive environments.
It delivers 30.6 V clamping voltage at 19.6 A (10/1000 µs), with low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of ESD and load-dump transients before sensitive downstream ICs or MOSFETs are damaged. The device is rated for repetitive 0.01% duty cycle pulses and 75 A non-repetitive forward surge current (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 20.9 / 22.0 / 23.1 V at 1 mA - defines precise voltage threshold where clamping initiates reliably |
| VWM | 18.8 V - maximum continuous reverse working voltage without leakage exceeding 1 µA |
| VC @ IPPM | 30.6 V at 19.6 A - clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM | 600 W - peak pulse power handling capability under standard 10/1000 µs waveform |
| TJ max. | +185 °C - enables use in high-temperature automotive zones without derating penalties |
| Polarity | Unidirectional - protects against positive transients only; cathode band denotes polarity |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
TPSMB22AHE3/5BT is housed in an SMB (DO-214AA) plastic package with two terminals: cathode (marked by color band) and anode. The package meets UL 94 V-0 flammability rating and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; absorbs transient energy into ground path during overvoltage events |
| Anode | Reference/return node | Typically tied to system ground or low-impedance return plane; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per JEDEC standards |
| Junction passivation design | Minimizes parameter drift over lifetime and improves stability under high-temperature bias conditions |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
| Low clamping ratio (VC/VBR ≈ 1.39) | Reduces stress on downstream components by limiting overshoot during fast transients |
| 75 A IFSM (8.3 ms) | Withstands high-energy load-dump events common in 12 V automotive electrical systems |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Interface |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control modules from ISO 7637-2 Pulse 5a/b load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and DC-DC converter input stage. Use Value: Clamps surge to ≤30.6 V within nanoseconds, preventing latch-up or damage to 36 V-rated buck controllers and microcontrollers. |
Use Scenario: Shields FPD-Link III or GMSL serial interface lines in rear-view or surround-view cameras from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential data pairs, mounted adjacent to connector. Use Value: Maintains signal integrity with <1 pF junction capacitance at zero bias while suppressing ±15 kV contact ESD per IEC 61000-4-2. |
| Industrial PLC Digital Input Module | Telecom PoE Midspan Surge Protection |
Use Scenario: Guards 24 V DC digital input channels in programmable logic controllers against field-wiring induced transients and relay coil kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each optocoupler input leg, referenced to common ground. Use Value: Ensures reliable detection under 1 kV ring wave (IEC 61000-4-5) without false triggering or degradation after repeated surges. |
Use Scenario: Provides primary-level surge immunity on Ethernet data pairs upstream of PoE power sourcing equipment (PSE) controllers. IC Role / Device Role / Timing Role: Unidirectional TVS on each twisted pair, coordinated with gas discharge tube (GDT) front-end. Use Value: Limits let-through voltage to <35 V during 10/700 µs telecom surge, preserving PHY ICs compliant with IEEE 802.3af/at. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same VBR range (20.9–23.1 V), but lower PPPM = 400 W and VC = 35.5 V at 11.3 A; SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select when cost or board space is critical and surge energy remains below 400 W capability |
| SMCJ22A | Higher PPPM = 1500 W, VC = 35.5 V at 42.3 A; larger SMC (DO-214AB) package; same AEC-Q101 qualification available | Better suited for high-energy load-dump or lightning protection; requires larger PCB footprint and thermal pads | Choose when system-level testing reveals margin shortfall with 600 W rating or when dual-stage protection architecture is used |
Compared with SMAJ22A and SMCJ22A, the TPSMB22AHE3/5BT delivers optimal balance of automotive qualification, SMB footprint compatibility, and 600 W surge handling - making it preferred for space-constrained ECU and ADAS submodules where thermal management and qualification compliance are jointly critical.
Availability
TPSMB22AHE3/5BT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom PoE surge mitigation requiring stable component supply, full traceability, and long-term lifecycle continuity.
Supply support for TPSMB22AHE3/5BT 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, and passive components for automotive, industrial, and computing markets.
The TPSMB series belongs to Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for robust, high-temperature surge protection in automotive electronics and harsh-environment industrial controls.
FAQ
What is the polarity configuration of the TPSMB22AHE3/5BT?
The TPSMB22AHE3/5BT is a unidirectional TVS diode, meaning it conducts only during positive voltage transients relative to its cathode terminal. The cathode is marked by a color band on the SMB package body. This configuration provides precise clamping on DC power rails where reverse-voltage events are not expected, and it ensures minimal leakage at VWM = 18.8 V. The TPSMB22AHE3/5BT does not protect against negative-going surges unless paired with a complementary device.
Is the TPSMB22AHE3/5BT AEC-Q101 qualified?
Yes, the TPSMB22AHE3/5BT is AEC-Q101 qualified - confirmed by Vishay's documentation for base part numbers ending in HE3 or HM3. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV), validating its suitability for automotive applications such as engine control units and ADAS sensors. The "HE3" suffix in TPSMB22AHE3/5BT explicitly denotes this qualification status.
What is the maximum clamping voltage of the TPSMB22AHE3/5BT under surge conditions?
The TPSMB22AHE3/5BT has a maximum clamping voltage (VC) of 30.6 V at 19.6 A peak pulse current, measured using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events. Engineers must verify that downstream components - such as DC-DC converters or microcontroller I/O pins - have sufficient voltage margin above 30.6 V to avoid damage or malfunction when the TPSMB22AHE3/5BT is active.
Does the TPSMB22AHE3/5BT require special PCB layout considerations?
Yes - the TPSMB22AHE3/5BT requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads at each terminal to meet its specified 600 W peak pulse power rating. Smaller pads reduce thermal dissipation and cause premature failure under surge. Additionally, minimize trace length between the TPSMB22AHE3/5BT and protected node, place it as close as possible to the entry point (e.g., connector or fuse), and ensure low-inductance grounding to preserve its <1 ns response time. These practices are essential to achieve the published VC and IPPM performance of the TPSMB22AHE3/5BT.
How does the TPSMB22AHE3/5BT perform at elevated junction temperatures?
The TPSMB22AHE3/5BT maintains stable electrical characteristics up to +185 °C junction temperature, with VBR exhibiting a temperature coefficient of +0.084 %/°C. At 150 °C, its breakdown voltage increases by approximately 10.5% over the 25 °C value - i.e., from 22.0 V to ~24.3 V. This predictable shift allows designers to validate clamping margins across the full operating range. The TPSMB22AHE3/5BT's high-TJ rating eliminates derating in under-hood automotive applications where ambient temperatures exceed 125 °C.
TPSMB22AHE3/5BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 19.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
TPSMB22AHE3/5BT FAQ
1.How can I place an order for TPSMB22AHE3/5BT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB22AHE3/5BT 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 TPSMB22AHE3/5BT reliable?
The price and inventory of TPSMB22AHE3/5BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB22AHE3/5BT is usually 5 days.
3.What payment methods are accepted for TPSMB22AHE3/5BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB22AHE3/5BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB22AHE3/5BT?
TPSMB22AHE3/5BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB22AHE3/5BT 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 TPSMB22AHE3/5BT?
For technical support, including TPSMB22AHE3/5BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB22AHE3/5BT requirements.
6.How does Aetrix verify that TPSMB22AHE3/5BT is sourced from the original manufacturer or authorized distributors?
All TPSMB22AHE3/5BT 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 TPSMB22AHE3/5BT meets industry standards.
7.What is the process for return or replacement of TPSMB22AHE3/5BT?
All TPSMB22AHE3/5BT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB22AHE3/5BT, 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 TPSMB22AHE3/5BT part is unused and in its original packaging.
Return procedure for TPSMB22AHE3/5BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB22AHE3/5BT Tags
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