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Vishay General Semiconductor - Diodes Division TPSMB18AHM3_A/I
- Part No.:
- TPSMB18AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18AHM3_A/I.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,368
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Product details
Overview
TPSMB18AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive and lightning-induced transients on power rails and signal lines. It features a 18.0 V nominal breakdown voltage (VBR), 15.3 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 18.2 A peak pulse current (IPPM), and 25.2 V maximum clamping voltage (VC) - deployed in automotive engine control units, industrial sensor interfaces, and telecom power supplies.
For engineers reviewing the TPSMB18AHM3_A/I datasheet, TPSMB18AHM3_A/I pinout, TPSMB18AHM3_A/I application, or TPSMB18AHM3_A/I equivalent, this page delivers verified electrical specs, SMB (DO-214AA) package details, AEC-Q101 qualification status, thermal derating curves, and real-world protection use cases - all aligned to Vishay Document #88406 (Rev. 23-Jan-2024).
Technical Context
This TVS diode operates as a unidirectional clamping device with an anisotropic rectifier structure optimized for high-temperature reliability. Its junction passivation enables stable performance up to TJ = 185 °C and meets JESD201 Class 2 whisker resistance requirements.
The device responds to transients within picoseconds and maintains low incremental surge resistance under 10/1000 µs waveform stress. It is rated for 75 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and exhibits a +0.080 %/°C temperature coefficient of VBR, enabling predictable voltage shift across operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V at IT = 1 mA - defines precise clamping onset threshold under standardized test conditions |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 25.2 V at 18.2 A - clamped voltage during 600 W transient, limiting downstream IC stress |
| PPPM | 600 W (10/1000 µs) - peak transient energy absorption capability without failure |
| TJ max. | +185 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability per stress test requirements |
| Package | SMB (DO-214AA) - industry-standard SMD outline with 0.220" x 0.130" footprint and MSL Level 1 rating |
Pinout & Package
TPSMB18AHM3_A/I uses the SMB (DO-214AA) surface-mount package: cathode-indicating band on one end, matte tin-plated leads solderable per J-STD-002, and UL 94 V-0 compliant molding compound. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or transient clamping | Connected to protected circuit ground or low-side return path; must handle 75 A surge |
| Cathode | Current exit point during clamping; marked by color band | Connected to line being protected (e.g., 12 V rail); defines polarity-sensitive placement |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivated anisotropic rectifier | Enables stable VBR drift < ±5 % over 1000 hrs at 150 °C, critical for long-life automotive modules |
| 185 °C junction rating | Supports placement near heat sources (e.g., power MOSFETs, DC-DC converters) without derating loss |
| 600 W peak pulse power (10/1000 µs) | Clamps ISO 7637-2 Pulse 1/2a/5a transients in 12 V vehicle systems without degradation |
| Low clamping ratio (VC/VBR = 1.40) | Minimizes overvoltage margin between clamp level and IC absolute maximum ratings |
| Halogen-free, RoHS-compliant, AEC-Q101 qualified | Fulfills automotive OEM material compliance mandates and supply chain sustainability requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes before LDOs or microcontrollers. Use Value: Limits VC to 25.2 V during 600 W surges, preventing damage to 30 V-rated power management ICs and ensuring ASIL-B functional safety integrity. | Use Scenario: Protecting analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) from ESD and inductive kickback in factory automation sensors. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamping element mounted directly at connector interface to shunt fast transients. Use Value: Responds in <1 ps to sub-100 ns ESD events while maintaining signal integrity due to minimal parasitic capacitance and low VF (3.5 V @ 50 A). |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Surge Suppression |
Use Scenario: Safeguarding PoE-powered switches and base station RF modules against lightning-induced surges on 48 V DC inputs. IC Role / Device Role / Timing Role: Primary clamping stage upstream of DC-DC converters, sized to absorb repetitive 10/1000 µs transients per IEC 61000-4-5 Level 4. Use Value: Delivers 600 W pulse handling with <0.01 % duty cycle tolerance, enabling robust front-end protection without thermal runaway. | Use Scenario: Mitigating back-EMF from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: Freewheeling path across motor terminals to dissipate inductive energy during MOSFET turn-off. Use Value: Withstands 75 A IFSM (8.3 ms) and clamps at 25.2 V, preventing MOSFET avalanche failure and reducing EMI generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Same VBR (18 V), but lower PPPM = 400 W and VC = 29.2 V; SMB package not identical - SMA (DO-214AC) has smaller pad area | Not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select only for cost-sensitive consumer applications where 400 W rating suffices and thermal margin is ample |
| TPSMB18AHM3_A/H | Identical electrical specs and construction; differs only in tape-and-reel packaging (750 pcs vs. 3200 pcs per reel) | No functional difference; same PCB layout, same reliability, same qualification | Choose based on production volume and assembly line feeder compatibility - no design impact |
Compared with SMAJ18A and TPSMB18AHM3_A/H, the TPSMB18AHM3_A/I offers superior automotive-grade reliability (AEC-Q101), higher 600 W surge capacity, tighter clamping (25.2 V vs. 29.2 V), and halogen-free compliance - making it the preferred choice for mission-critical 12 V/24 V systems requiring long-term field stability.
Availability
TPSMB18AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power inputs requiring stable component supply, AEC-Q101 traceability, and consistent SMB (DO-214AA) form factor.
Supply support for TPSMB18AHM3_A/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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on high-reliability, high-temperature, and automotive-qualified components.
The TPSMB series was engineered specifically for robust transient suppression in harsh environments - targeting automotive power distribution, industrial automation, and infrastructure equipment where failure modes demand proven AEC-Q101 validation and 185 °C junction endurance.
FAQ
What is the exact breakdown voltage range for TPSMB18AHM3_A/I?
The TPSMB18AHM3_A/I has a guaranteed breakdown voltage (VBR) range of 17.1 V (min) to 18.9 V (max) at IT = 1 mA, with a nominal value of 18.0 V. This specification is confirmed in Vishay Document #88406, Table on page 2, and applies strictly to the TPSMB18AHM3_A/I variant with HM3 suffix and A revision code.
Is TPSMB18AHM3_A/I AEC-Q101 qualified?
Yes, TPSMB18AHM3_A/I is AEC-Q101 qualified. The HM3 suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction per Vishay's ordering information and mechanical data section (page 1). Qualification covers temperature cycling, HTRB, and ESD testing required for automotive under-hood deployment.
What is the maximum clamping voltage of TPSMB18AHM3_A/I at its rated peak pulse current?
The maximum clamping voltage (VC) of TPSMB18AHM3_A/I is 25.2 V at IPPM = 18.2 A (10/1000 µs waveform), as specified in the Electrical Characteristics table (page 2) of Vishay Document #88406. This value ensures safe operation for downstream 30 V-rated ICs in automotive and industrial power rails.
Does TPSMB18AHM3_A/I have bidirectional polarity?
No, TPSMB18AHM3_A/I is unidirectional only. The datasheet explicitly states "Available in unidirectional polarity only" (page 1, FEATURES section), and the device marking code "LEP" and cathode band orientation confirm single-direction conduction - it conducts only when cathode is positive relative to anode.
What is the package type and moisture sensitivity level (MSL) of TPSMB18AHM3_A/I?
TPSMB18AHM3_A/I uses the SMB (DO-214AA) surface-mount package and meets MSL Level 1 per J-STD-020, with a maximum lead-free reflow peak temperature of 260 °C. This is documented in the Mechanical Data section (page 1) and confirms unlimited floor life under standard storage conditions.
TPSMB18AHM3_A/I 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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 23.8A
- 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)
TPSMB18AHM3_A/I FAQ
1.How can I place an order for TPSMB18AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18AHM3_A/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 TPSMB18AHM3_A/I reliable?
The price and inventory of TPSMB18AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB18AHM3_A/I is usually 5 days.
3.What payment methods are accepted for TPSMB18AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18AHM3_A/I?
TPSMB18AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18AHM3_A/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 TPSMB18AHM3_A/I?
For technical support, including TPSMB18AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18AHM3_A/I requirements.
6.How does Aetrix verify that TPSMB18AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All TPSMB18AHM3_A/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 TPSMB18AHM3_A/I meets industry standards.
7.What is the process for return or replacement of TPSMB18AHM3_A/I?
All TPSMB18AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18AHM3_A/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 TPSMB18AHM3_A/I part is unused and in its original packaging.
Return procedure for TPSMB18AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18AHM3_A/I Tags
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