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Vishay General Semiconductor - Diodes Division TPSMB18AHM3_A/H
- Part No.:
- TPSMB18AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18AHM3_A/H.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPSMB18AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 18.0 V nominal breakdown voltage (VBR), 15.3 V maximum stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 23.8 A peak pulse current (IPPM), and 25.2 V maximum clamping voltage (VC) at IPPM, operating reliably up to +185 °C junction temperature.
For engineers reviewing the TPSMB18AHM3_A/H datasheet, TPSMB18AHM3_A/H pinout, TPSMB18AHM3_A/H application, or TPSMB18AHM3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant construction, SMB (DO-214AA) package with cathode band polarity marking, and verified performance under automotive-grade thermal and surge stress conditions.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only during reverse overvoltage events above its breakdown threshold while remaining high-impedance under normal operation at ≤15.3 V. Its silicon junction passivation enables stable VBR drift of only +0.080 %/°C and reliable operation up to TJ = +185 °C - critical for under-hood automotive and industrial motor drive applications.
The device delivers 600 W peak pulse power per 10/1000 µs waveform with low incremental surge resistance and fast response time (<1 ns), achieving clamping at 25.2 V when subjected to 23.8 A transient current. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming robustness for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures precise overvoltage triggering with ±5.5% tolerance at 1 mA test current |
| VWM | 15.3 V - maximum continuous working voltage before leakage exceeds 1 μA, defining safe operating margin |
| VC @ IPPM | 25.2 V - clamped voltage during 23.8 A surge, limiting downstream IC stress to safe levels |
| PPPM | 600 W - peak transient energy absorption capability under standardized 10/1000 µs waveform |
| TJ max. | +185 °C - enables deployment in high-temperature environments such as engine control units and power converters |
| Polarity | Unidirectional - protects against negative-going transients only; requires correct orientation in circuit |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.205" × 0.220" footprint and matte tin-plated leads |
Pinout & Package
TPSMB18AHM3_A/H uses the SMB (DO-214AA) package: a two-terminal, surface-mount plastic case with cathode indicated by a color band. Terminals are matte tin-plated and solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when reverse voltage exceeds VBR |
| Anode | Reference/return path | Typically tied to system ground or lower-potential rail; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body modules, and ADAS sensors |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements without compromising thermal or electrical performance |
| Junction passivated anisotropic rectifier | Ensures stable VBR over temperature and lifetime, with minimal parameter drift across 1000+ surge cycles |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without moisture-related damage |
| Low clamping ratio (VC/VBR ≈ 1.40) | Delivers tight voltage limiting relative to breakdown, minimizing stress on downstream MOSFETs and ICs |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤25.2 V during 23.8 A surges, preventing latch-up or gate oxide damage in MCU and CAN transceivers. |
Use Scenario: Shielding encoder feedback lines and PWM gate drivers in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response surge suppressor on isolated signal paths subject to inductive kickback. Use Value: Sub-1 ns response and 25.2 V clamping protect 3.3 V/5 V logic interfaces and gate drivers from ESD and switching noise. |
| Telecom DC Power Input Protection | Consumer Appliance Control Board Protection |
Use Scenario: Safeguarding PoE-powered network switches and base station RF modules against lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input stage upstream of DC/DC converters. Use Value: 600 W pulse handling and 185 °C operation ensure reliability in outdoor telecom enclosures exposed to wide ambient swings. |
Use Scenario: Securing microcontroller reset lines and relay coil flyback paths in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA at 15.3 V) transient suppressor on 3.3 V/5 V supply domains. Use Value: Prevents false resets and relay chatter during compressor startup surges while maintaining low standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | Same VBR (18 V), but lower PPPM = 400 W and higher VC = 29.2 V; SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select when cost sensitivity outweighs surge margin and automotive qualification is unnecessary |
| SMCJ18A | Higher PPPM = 1500 W and same VBR; larger SMC package; VC = 29.2 V; AEC-Q101 available in HM3 variant | Better suited for high-energy industrial surges but requires more PCB area and has slower thermal recovery | Choose when protecting high-current bus lines where 600 W is insufficient and layout allows SMC footprint |
Compared with SMAJ18A and SMCJ18A, the TPSMB18AHM3_A/H offers optimal balance of automotive qualification, compact SMB footprint, 600 W surge capacity, and low 25.2 V clamping - making it ideal for space-constrained, thermally demanding applications where both reliability and board area efficiency are critical.
Availability
TPSMB18AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, telecom power supplies, and consumer appliance control boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for TPSMB18AHM3_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 solutions.
The TPSMB series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor product line, engineered specifically for robust surge protection in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the exact breakdown voltage range for TPSMB18AHM3_A/H?
The TPSMB18AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 17.1 V (minimum) to 18.9 V (maximum) at 1 mA test current, with 18.0 V nominal. This specification is measured per ANSI/IEEE C62.35 and confirmed across production lots. The TPSMB18AHM3_A/H maintains this tolerance under thermal stress up to +150 °C, supporting design margin verification in automotive and industrial applications.
Is TPSMB18AHM3_A/H AEC-Q101 qualified?
Yes, TPSMB18AHM3_A/H is AEC-Q101 qualified. The "HM3" suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction per Vishay's ordering nomenclature. Qualification includes temperature cycling, highly accelerated life testing (HALT), and surge endurance validation - confirming suitability for automotive powertrain and body electronics where reliability is mission-critical.
What does the "_A/H" suffix mean in TPSMB18AHM3_A/H?
The "_A/H" suffix in TPSMB18AHM3_A/H indicates revision code "A" and packaging in 7-inch diameter plastic tape and reel (package code H), with a base quantity of 750 units per reel. This matches Vishay's official ordering information table and confirms compatibility with standard SMT pick-and-place equipment using industry-standard carrier tape dimensions and sprocket hole spacing.
How does TPSMB18AHM3_A/H compare to TPSMB18AHE3_A/H?
The TPSMB18AHM3_A/H differs from TPSMB18AHE3_A/H solely in material composition: HM3 is halogen-free and RoHS-compliant, while HE3 is RoHS-compliant but not halogen-free. Both share identical electrical specs, AEC-Q101 qualification, SMB package, and thermal ratings. The TPSMB18AHM3_A/H is preferred for environmentally regulated markets requiring halogen-free compliance without sacrificing performance or reliability.
What is the maximum clamping voltage of TPSMB18AHM3_A/H at rated surge current?
The TPSMB18AHM3_A/H has a maximum clamping voltage (VC) of 25.2 V at its rated peak pulse current (IPPM) of 23.8 A, measured under the standard 10/1000 µs waveform. This value is guaranteed per datasheet Table "ELECTRICAL CHARACTERISTICS" and defines the upper voltage limit imposed on protected circuits during worst-case transient events - essential for validating safe operation of downstream 24 V-rated components.
TPSMB18AHM3_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):
- 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/H FAQ
1.How can I place an order for TPSMB18AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18AHM3_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 TPSMB18AHM3_A/H reliable?
The price and inventory of TPSMB18AHM3_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 TPSMB18AHM3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB18AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18AHM3_A/H?
TPSMB18AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18AHM3_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 TPSMB18AHM3_A/H?
For technical support, including TPSMB18AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18AHM3_A/H requirements.
6.How does Aetrix verify that TPSMB18AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB18AHM3_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 TPSMB18AHM3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB18AHM3_A/H?
All TPSMB18AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18AHM3_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 TPSMB18AHM3_A/H part is unused and in its original packaging.
Return procedure for TPSMB18AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18AHM3_A/H Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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