My Inquiry
My Account
Vishay General Semiconductor - Diodes Division TPSMB18AHE3/52T
;;2.jpg)
- Part No.:
- TPSMB18AHE3/52T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB18AHE3/52T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,750
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPSMB18AHE3/52T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode 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 maximum stand-off voltage (VWM), 600 W peak pulse power (10/1000 µs), 25.2 V maximum clamping voltage at 23.8 A, and operates up to +185 °C junction temperature - deployed in automotive power supply protection and industrial sensor interface circuits.
For engineers reviewing the TPSMB18AHE3/52T datasheet, TPSMB18AHE3/52T pinout, TPSMB18AHE3/52T application, or TPSMB18AHE3/52T equivalent, key selection criteria include unidirectional polarity, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, TJ = 185 °C thermal rating, and clamping performance under 10/1000 µs surge conditions.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable breakdown behavior across temperature and high reliability under repetitive surge stress. 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.
The device exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of sub-microsecond transients. Clamping occurs at 25.2 V when subjected to its rated 23.8 A peak pulse current (IPPM), with leakage current limited to ≤1 µA at 15.3 V and ≤5 µA at TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - ensures reliable triggering above system operating voltage while maintaining margin against false conduction |
| VWM | 15.3 V - maximum continuous reverse voltage before significant leakage; compatible with 12 V automotive systems |
| IPPM | 23.8 A (10/1000 µs) - defines surge current handling capability without degradation under standard test waveform |
| VC | 25.2 V - clamped voltage during IPPM; determines maximum stress imposed on protected downstream ICs |
| PPPM | 600 W - peak pulse power dissipation capacity; validates robustness against ISO 7637-2 Pulse 1/2a/5a events |
| TJ max. | +185 °C - enables use in high-temperature zones such as engine control units and motor drive PCBs |
| Polarity | Unidirectional - protects only against positive transients relative to cathode; requires correct orientation in circuit |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated terminals, RoHS-compliant and AEC-Q101 qualified (HE3 suffix). Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VBR exceeded |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation | Stable VBR drift <0.08 %/°C and minimal leakage increase over lifetime in harsh environments |
| AEC-Q101 qualification | Validated for automotive applications including powertrain and body electronics per stress test requirements |
| MSL Level 1 | Supports single-reflow assembly at 260 °C peak without moisture-induced damage |
| 600 W pulse rating | Withstands repeated ISO 7637-2 transient pulses without parameter shift or failure |
| Low clamping ratio (VC/VBR) | 1.40 - tight voltage margin between trigger and clamp improves system-level ESD/transient immunity |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Suppressing load-dump and inductive switching transients on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Standoff clamping element placed between power input and local regulator or microcontroller power pins. Use Value: Limits voltage excursion to ≤25.2 V during 23.8 A surges, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. |
Use Scenario: Protecting analog front-end inputs of pressure, temperature, and position sensors exposed to EMI in factory automation equipment. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential or single-ended signal traces before ADC input stages. Use Value: Maintains signal integrity with <1 µA leakage at 15.3 V while clamping fast transients before they saturate op-amp inputs. |
| Telecom DC Power Input | Consumer USB-C Power Delivery |
Use Scenario: Safeguarding primary-side DC/DC converters in PoE-powered network switches and base stations against lightning-induced surges on 48 V input rails. IC Role / Device Role / Timing Role: Primary-stage TVS placed upstream of input filter capacitor and controller IC. Use Value: Absorbs 600 W pulses without thermal runaway, preserving converter startup behavior and reducing need for oversized input capacitors. |
Use Scenario: Secondary-side overvoltage protection on VBUS lines in portable devices supporting USB-C PD negotiation up to 20 V. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and GND, sized to handle hot-swap and cable-insertion transients. Use Value: Clamps to 25.2 V within nanoseconds, ensuring compliance with USB PD 3.1 fault tolerance requirements while avoiding false shutdown. |
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 range (17.1–18.9 V), but lower PPPM = 400 W and non-AEC-Q101 rated; SMB package identical | Not qualified for automotive; suitable for commercial-grade industrial or telecom power supplies | Select SMAJ18A only if AEC-Q101 compliance and 600 W surge margin are not required. |
| TPSMB18AHM3/52T | Identical electrical specs and AEC-Q101 qualification; differs only in halogen-free molding compound (HM3 vs HE3) | No functional difference; HM3 required where halogen-free compliance is mandated (e.g., EU automotive Tier 1) | Choose TPSMB18AHM3/52T when material compliance (IEC 61249-2-21) is specified in BOM requirements. |
Compared with SMAJ18A, TPSMB18AHE3/52T delivers higher surge robustness and automotive qualification; versus TPSMB18AHM3/52T, it offers identical protection performance with standard RoHS-compliant (non-halogen-free) packaging - enabling cost-optimized sourcing where halogen restrictions do not apply.
Availability
TPSMB18AHE3/52T is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor module production, and telecom power supply development requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for TPSMB18AHE3/52T 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, optoelectronics, and passive components for demanding industrial and automotive applications.
The TPSMB series belongs to Vishay's PAR® (Protected Anisotropic Rectifier) transient voltage suppressor family, engineered specifically for high-temperature stability and repeatable clamping performance in automotive power distribution and industrial control systems.
FAQ
What is the maximum clamping voltage of the TPSMB18AHE3/52T under rated surge conditions?
The TPSMB18AHE3/52T has a maximum clamping voltage (VC) of 25.2 V when subjected to its rated 23.8 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected downstream components experience no more than 25.2 V during worst-case transient events - critical for safeguarding 12 V–24 V automotive ICs and industrial controllers.
Is the TPSMB18AHE3/52T qualified for automotive applications?
Yes, the TPSMB18AHE3/52T is AEC-Q101 qualified, as confirmed by Vishay's official documentation and ordering code suffix "HE3". This qualification covers stress tests including HTGB, AC-H3TRB, and temperature cycling, validating its suitability for under-hood and chassis-mounted automotive electronics where reliability at TJ = 185 °C is mandatory.
What does the "HE3" suffix indicate in TPSMB18AHE3/52T?
The "HE3" suffix in TPSMB18AHE3/52T denotes RoHS-compliant construction and AEC-Q101 qualification. It also specifies matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, plus JESD 201 Class 2 whisker resistance - distinguishing it from non-automotive variants and confirming suitability for high-reliability automated assembly processes.
Can the TPSMB18AHE3/52T be used in bidirectional protection configurations?
No, the TPSMB18AHE3/52T is unidirectional only, as explicitly stated in Vishay's datasheet. It conducts surge current from cathode to anode only. For bidirectional protection, two TPSMB18AHE3/52T devices must be connected in series opposition, or a dedicated bidirectional TVS (e.g., TPSMB18CA) should be selected instead.
What is the thermal derating behavior of the TPSMB18AHE3/52T above 25 °C ambient?
The TPSMB18AHE3/52T follows Vishay's standard derating curve (Fig. 2 in document 88406): peak pulse power decreases linearly from 600 W at 25 °C to ~300 W at 125 °C ambient, with full derating to zero at TJ = 185 °C. Designers must apply this curve when calculating safe surge margins in high-temperature enclosures or near heat sources.
TPSMB18AHE3/52T 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
TPSMB18AHE3/52T FAQ
1.How can I place an order for TPSMB18AHE3/52T through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB18AHE3/52T 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 TPSMB18AHE3/52T reliable?
The price and inventory of TPSMB18AHE3/52T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB18AHE3/52T is usually 5 days.
3.What payment methods are accepted for TPSMB18AHE3/52T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB18AHE3/52T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB18AHE3/52T?
TPSMB18AHE3/52T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB18AHE3/52T 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 TPSMB18AHE3/52T?
For technical support, including TPSMB18AHE3/52T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB18AHE3/52T requirements.
6.How does Aetrix verify that TPSMB18AHE3/52T is sourced from the original manufacturer or authorized distributors?
All TPSMB18AHE3/52T 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 TPSMB18AHE3/52T meets industry standards.
7.What is the process for return or replacement of TPSMB18AHE3/52T?
All TPSMB18AHE3/52T units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB18AHE3/52T, 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 TPSMB18AHE3/52T part is unused and in its original packaging.
Return procedure for TPSMB18AHE3/52T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB18AHE3/52T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
