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Vishay General Semiconductor - Diodes Division TPSMB20AHM3_A/H
- Part No.:
- TPSMB20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB20AHM3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMB20AHM3_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 20 V breakdown voltage (VBR = 19–21 V), 17.1 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 21.7 A peak pulse current (IPPM), and 27.7 V maximum clamping voltage (VC) - deployed in automotive engine control units to protect 12 V supply inputs.
For engineers reviewing the TPSMB20AHM3_A/H datasheet, TPSMB20AHM3_A/H pinout, TPSMB20AHM3_A/H application, or TPSMB20AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, TJ = 185 °C junction rating, SMB (DO-214AA) package compatibility with high-reliability PCB layouts, and halogen-free RoHS-compliant construction per ordering suffix HM3.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions up to 0.01% duty cycle. Its unidirectional polarity and low incremental surge resistance ensure rapid response (<1 ns) and minimal voltage overshoot during 10/1000 µs transients.
Rated for operation from –65 °C to +185 °C, it supports automotive under-hood environments and industrial motor drive systems where thermal derating must be minimized. The device meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing - critical for long-term solder joint integrity in vibration-prone applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - ensures reliable turn-on above system nominal voltage while avoiding false triggering at VWM = 17.1 V |
| VC @ IPPM | 27.7 V - limits downstream IC stress during 21.7 A surge, staying well below 30 V logic rail tolerance thresholds |
| PPPM | 600 W - sustains 10/1000 µs transients common in ISO 7637-2 Pulse 1 & 2 automotive tests without degradation |
| IFSM | 75 A - withstands 8.3 ms half-sine surges from relay coil de-energization or solenoid switching |
| TJ max. | +185 °C - enables placement near heat sources (e.g., power MOSFETs) without derating in engine control modules |
| Package | SMB (DO-214AA) - industry-standard footprint with 0.220" × 0.205" pad layout, compatible with automated SMT assembly |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by molded band. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line (e.g., 12 V rail); clamps positive transients to ground when reverse-biased |
| Anode | Cathode of internal PN junction | Connected to system ground; provides low-impedance return path for surge current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TC, HAST, and UHAST - required for ECU and ADAS module BOMs |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IEC 61249-2-21 and JEDEC J-STD-609A Class 1 - supports green manufacturing and export compliance |
| Junction temperature capability: 185 °C | Enables direct placement on high-power PCB zones without thermal isolation - reduces board area vs. lower-TJ alternatives |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to downstream components - critical for protecting 24 V-rated CAN transceivers and microcontrollers |
| MSL Level 1, peak reflow ≤ 260 °C | Allows single-pass lead-free reflow without moisture sensitivity concerns - eliminates baking step in high-volume production |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 16750-2) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC/DC converter input stage. Use Value: Clamps 35 V/100 ms load dump to ≤27.7 V within nanoseconds, preventing overvoltage shutdown of PMICs and MCU power supplies. |
Use Scenario: Protecting analog outputs of pressure sensors in hydraulic control valves exposed to inductive kickback. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to shunt fast-rising transients induced by nearby solenoid actuation. Use Value: Limits transient amplitude to <28 V, preserving 16-bit ADC accuracy and preventing latch-up in op-amp signal conditioning stages. |
| Telecom DC Power Input Protection | Computer Peripheral USB VBUS Surge Suppression |
Use Scenario: Guarding 48 V PoE-powered network switches against lightning-induced surges on primary DC input. IC Role / Device Role / Timing Role: Primary-stage TVS on 48 V bus upstream of hot-swap controller and bulk capacitors. Use Value: Absorbs 600 W pulses without failure, maintaining >10⁵ surge cycles per MIL-STD-883H Method 3015.8 - extends field service life. |
Use Scenario: Safeguarding USB Type-A host ports against ESD and cable discharge events during hot-plug insertion. IC Role / Device Role / Timing Role: TVS mounted directly at USB connector VBUS pin to minimize trace inductance before protection IC. Use Value: Achieves <1 ns response time and clamps ±15 kV contact ESD (IEC 61000-4-2) to <30 V - prevents damage to USB PHY and hub controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VBR range (19–21 V), but rated for only 400 W PPPM; non-AEC-Q101; standard RoHS (not halogen-free) | Limited to commercial-grade consumer electronics; not approved for automotive under-hood deployment | Select SMAJ20A only for cost-sensitive, non-automotive designs where 400 W surge margin suffices and halogen-free compliance is optional. |
| TPSMB20AHM3_A/I | Identical electrical specs and qualification; differs only in packaging - 3200-unit 13" tape-and-reel vs. 750-unit 7" reel (H vs. I) | No functional difference; choice depends solely on production volume and SMT feeder compatibility | Choose TPSMB20AHM3_A/I for high-mix, low-volume builds or pilot runs requiring smaller reels; no design or reliability impact. |
Compared with SMAJ20A, TPSMB20AHM3_A/H delivers 50% higher surge power handling and automotive qualification - essential for Tier-1 ECU designs. Against TPSMB20AHM3_A/I, it offers identical performance with optimized reel size for medium-volume SMT lines.
Availability
TPSMB20AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply inputs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for TPSMB20AHM3_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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The TPSMB series was engineered specifically for robust transient suppression in harsh-environment electronics - emphasizing high-temperature stability, AEC-Q101 validation, and consistent clamping performance across wide operating ranges.
FAQ
What is the maximum clamping voltage of the TPSMB20AHM3_A/H under a 10/1000 µs surge?
The TPSMB20AHM3_A/H has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 21.7 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry remains below critical overvoltage thresholds during standardized surge events. The TPSMB20AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is the TPSMB20AHM3_A/H qualified for automotive applications?
Yes, the TPSMB20AHM3_A/H is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HM3". It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) - making it suitable for engine control units, body electronics, and ADAS modules where automotive-grade reliability is mandatory. The TPSMB20AHM3_A/H meets all requirements for under-hood deployment up to +185 °C junction temperature.
What does the "HM3" suffix indicate in TPSMB20AHM3_A/H?
The "HM3" suffix in TPSMB20AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinct from the "HE3" suffix which is RoHS-compliant and AEC-Q101 qualified but not halogen-free. Both meet JESD201 Class 2 whisker resistance and MSL Level 1 reflow standards. The TPSMB20AHM3_A/H satisfies environmental regulations such as IEC 61249-2-21 and is designated for green manufacturing processes requiring zero brominated flame retardants.
Can the TPSMB20AHM3_A/H replace the TPSMB20AHE3_A/H in an existing design?
The TPSMB20AHM3_A/H is electrically and mechanically identical to TPSMB20AHE3_A/H except for halogen content - both share the same VBR, VC, PPPM, package, and AEC-Q101 qualification. No PCB or schematic changes are needed for substitution. However, the TPSMB20AHM3_A/H adds halogen-free compliance, making it preferable for new designs targeting strict environmental certifications. The TPSMB20AHM3_A/H maintains full drop-in compatibility with legacy TPSMB20AHE3_A/H footprints and thermal profiles.
What is the standoff voltage (VWM) of the TPSMB20AHM3_A/H, and why does it matter?
The TPSMB20AHM3_A/H has a maximum working standoff voltage (VWM) of 17.1 V - the highest continuous reverse voltage it can block without significant leakage. This parameter ensures the device remains non-conductive during normal 12 V or 24 V system operation while still triggering reliably during transients exceeding ~19 V. Exceeding VWM risks excessive leakage current and thermal runaway; the TPSMB20AHM3_A/H's 17.1 V rating provides safe margin above nominal 12 V rails and accommodates typical automotive battery fluctuations up to 16 V.
TPSMB20AHM3_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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
TPSMB20AHM3_A/H FAQ
1.How can I place an order for TPSMB20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB20AHM3_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 TPSMB20AHM3_A/H reliable?
The price and inventory of TPSMB20AHM3_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 TPSMB20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB20AHM3_A/H?
TPSMB20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB20AHM3_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 TPSMB20AHM3_A/H?
For technical support, including TPSMB20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB20AHM3_A/H requirements.
6.How does Aetrix verify that TPSMB20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB20AHM3_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 TPSMB20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB20AHM3_A/H?
All TPSMB20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB20AHM3_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 TPSMB20AHM3_A/H part is unused and in its original packaging.
Return procedure for TPSMB20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB20AHM3_A/H Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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