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Vishay General Semiconductor - Diodes Division TPSMB20AHE3_A/H
- Part No.:
- TPSMB20AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB20AHE3_A/H.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMB20AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching transients and lightning-induced surges on power rails and signal lines. It features a 20 V nominal 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) at IPPM, operating up to +185 °C junction temperature.
For engineers reviewing the TPSMB20AHE3_A/H datasheet, TPSMB20AHE3_A/H pinout, TPSMB20AHE3_A/H application, or TPSMB20AHE3_A/H equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package dimensions, cathode/anode terminal roles, automotive-grade AEC-Q101 qualification status, and real-world protection use cases in industrial power supplies and automotive sensor interfaces.
Technical Context
The TPSMB20AHE3_A/H operates as a unidirectional avalanche diode with passivated anisotropic rectifier technology, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient overvoltage before downstream ICs or MOSFETs are damaged. Its 185 °C maximum junction temperature enables operation in under-hood automotive environments and high-temperature industrial enclosures.
It is rated for 600 W peak pulse power per 10/1000 µs waveform at 0.01 % duty cycle, with clamping performance validated at 21.7 A IPPM and 27.7 V VC. The device meets JESD201 Class 2 whisker resistance and MSL Level 1 (260 °C reflow), and its RoHS-compliant, halogen-free HE3 suffix confirms AEC-Q101 qualification for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 19.0 / 20.0 / 21.0 V - Ensures reliable avalanche conduction onset above 17.1 V system operating voltage without false triggering |
| VWM | 17.1 V - Maximum continuous reverse working voltage compatible with 15–16 V automotive battery systems |
| VC @ IPPM | 27.7 V - Clamps 10/1000 µs surges to safe levels for 24 V-rated logic and gate drivers |
| IPPM | 21.7 A - Sustains single-event transients up to 600 W without degradation when mounted on 5 mm × 5 mm copper pads |
| PPPM | 600 W - Delivers robust surge immunity for ISO 7637-2 Pulse 1/2a/5a compliance in automotive ECUs |
| TJ max. | +185 °C - Supports placement near heat sources (e.g., power converters) without derating in engine control modules |
| Polarity | Unidirectional - Protects only against positive transients on anode-to-cathode bias; requires correct orientation in DC rail placement |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded case with UL 94 V-0 flammability rating; matte tin-plated leads; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction; connected to protected line's lower-potential side | Accepts surge current during reverse-biased clamping; must be routed to ground or return path with minimal inductance |
| Cathode | Current exit during clamping; connected to protected line's higher-potential side | Provides low-impedance path to shunt transient energy away from load; marked by visible band for orientation verification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive electronics per stress test requirements including HTOL, TC, HAST, and UHAST - enables direct use in ECU, ADAS, and body control modules |
| 185 °C junction temperature rating | Eliminates thermal derating in high-ambient environments such as under-hood power distribution units and motor drive inverters |
| 600 W peak pulse power (10/1000 µs) | Withstands repetitive load-dump transients per ISO 7637-2 without parameter shift or failure |
| Low clamping voltage (27.7 V @ 21.7 A) | Protects 24 V-rated microcontrollers and CAN transceivers while maintaining functional safety margins |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Input Stage |
|---|---|
Use Scenario: Protection of 12 V/24 V supply inputs against load dump (ISO 7637-2 Pulse 5a) and alternator ripple in engine management systems. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery rail and DC-DC converter input to clamp transients before regulation. Use Value: Limits voltage to ≤27.7 V during 100 V/100 ms load dump events, preventing damage to LDOs and MCU power pins rated for 30 V absolute maximum. |
Use Scenario: Guarding 24 V auxiliary power inputs in programmable logic controllers exposed to relay coil flyback and motor drive coupling. IC Role / Device Role / Timing Role: Standoff-clamp TVS on main DC bus to absorb inductive kickback from solenoid drivers and contactors. Use Value: Maintains system uptime by suppressing >1 kV transients to <30 V within nanoseconds, avoiding brownouts or latch-up in FPGA-based control logic. |
| Automotive Sensor Signal Line (e.g., ABS Wheel Speed) | Telecom Power Over Ethernet (PoE) Midspan Injector |
Use Scenario: Shielding low-voltage analog sensor outputs (e.g., 5 V Hall-effect signals) from ESD and cable discharge events in chassis-mounted modules. IC Role / Device Role / Timing Role: Localized unidirectional TVS at connector interface, oriented to protect against positive-going transients on signal-to-ground paths. Use Value: Achieves <1 ns response with <10 µA leakage at 17.1 V, preserving signal integrity while meeting ISO 10605 ±8 kV contact discharge requirements. |
Use Scenario: Secondary-side transient suppression on 48 V PoE output rails feeding remote switches and IP cameras. IC Role / Device Role / Timing Role: Clamp diode on PSE output stage to limit overshoot during hot-swap insertion and cable fault recovery. Use Value: Handles 600 W surges without degradation across 10⁵+ cycles, ensuring long-term reliability in carrier-class infrastructure equipment. |
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 VWM (17.1 V) and VC (32.4 V), but lower PPPM (400 W) and non-AEC-Q101 rated; SMB package identical | Limited to commercial/industrial use; not qualified for automotive under-hood deployment | Select SMAJ20A only for cost-sensitive non-automotive designs where 400 W surge margin suffices |
| TPSMB20AHM3_A/H | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free material composition (HM3 vs HE3) | No functional difference; HM3 required where halogen-free compliance is mandated (e.g., EU automotive Tier 1 specs) | Choose TPSMB20AHM3_A/H when RoHS + halogen-free certification is contractually required; otherwise HE3 is drop-in compatible |
Compared with SMAJ20A, TPSMB20AHE3_A/H provides 50 % higher surge power handling and automotive qualification; versus TPSMB20AHM3_A/H, it offers identical protection performance with standard RoHS compliance-making HE3 optimal for general automotive and industrial use where halogen-free is not mandated.
Availability
TPSMB20AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, telecom power-over-Ethernet injectors, and sensor interface modules requiring stable component supply across extended temperature and high-reliability environments.
Supply support for TPSMB20AHE3_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, high-temperature, and automotive-grade performance.
The TPSMB series was engineered specifically for robust transient suppression in harsh environments-targeting automotive powertrain, body electronics, and industrial automation where 185 °C operation and AEC-Q101 validation are mandatory.
FAQ
What is the maximum clamping voltage of the TPSMB20AHE3_A/H at its rated peak pulse current?
The TPSMB20AHE3_A/H has a maximum clamping voltage (VC) of 27.7 V when subjected to its rated peak pulse current of 21.7 A under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads and reflects worst-case clamping performance used for downstream component voltage margining in 24 V systems.
Is the TPSMB20AHE3_A/H qualified for automotive applications?
Yes, the TPSMB20AHE3_A/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's official datasheet (Document Number: 88406). It undergoes full stress testing-including high-temperature operating life, temperature cycling, and humidity testing-to meet automotive reliability standards for use in engine control units, ADAS modules, and body electronics.
What does the "HE3" suffix indicate in TPSMB20AHE3_A/H?
The "HE3" suffix in TPSMB20AHE3_A/H denotes a RoHS-compliant, AEC-Q101-qualified variant with matte tin-plated leads and JESD201 Class 2 whisker resistance. It is supplied in 7" plastic tape-and-reel packaging (750 units per reel), and the "_A/H" denotes revision A and package code H per Vishay's ordering nomenclature.
Can the TPSMB20AHE3_A/H replace the TPSMB20AHM3_A/H in a design?
Yes, the TPSMB20AHE3_A/H can replace TPSMB20AHM3_A/H in most applications because both share identical electrical specifications, package (SMB), AEC-Q101 qualification, and thermal ratings. The only difference is that HM3 is halogen-free while HE3 is RoHS-compliant but not halogen-free-so substitution is valid unless halogen-free compliance is contractually required.
What is the standoff voltage (VWM) and why is it critical for TPSMB20AHE3_A/H selection?
The TPSMB20AHE3_A/H has a standoff voltage (VWM) of 17.1 V, meaning it remains non-conductive below this reverse voltage. This value is critical because it must exceed the system's maximum normal operating voltage (e.g., 16 V for a 12 V automotive system with tolerance) to prevent leakage or false triggering while still allowing rapid avalanche conduction during transients exceeding VBR.
TPSMB20AHE3_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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
TPSMB20AHE3_A/H FAQ
1.How can I place an order for TPSMB20AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB20AHE3_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 TPSMB20AHE3_A/H reliable?
The price and inventory of TPSMB20AHE3_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 TPSMB20AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB20AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB20AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB20AHE3_A/H?
TPSMB20AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB20AHE3_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 TPSMB20AHE3_A/H?
For technical support, including TPSMB20AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB20AHE3_A/H requirements.
6.How does Aetrix verify that TPSMB20AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB20AHE3_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 TPSMB20AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB20AHE3_A/H?
All TPSMB20AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB20AHE3_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 TPSMB20AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMB20AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB20AHE3_A/H Tags
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