My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ188AHE3_A/H
;;2.jpg)
- Part No.:
- SMBJ188AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHE3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,070
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ188AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR) at 1 mA, 328 V maximum clamping voltage (VC) at 2.0 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in power supply rails, industrial I/O lines, and automotive sensor interfaces.
For engineers reviewing the SMBJ188AHE3_A/H datasheet, SMBJ188AHE3_A/H pinout, SMBJ188AHE3_A/H application, or SMBJ188AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, low incremental surge resistance, 150 °C maximum junction temperature, and compatibility with automated SMT assembly on SMB (DO-214AA) footprint.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, optimized for fast response (<1 ps typical) to ESD and lightning-induced transients. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the 20 °C/W junction-to-lead thermal resistance supports reliable surge energy dissipation under repetitive stress.
The SMBJ188AHE3_A/H is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), meets MSL Level 1 per J-STD-020, and achieves UL 497B recognition (QVGQ2). Its 100 °C/W junction-to-ambient thermal resistance reflects standard PCB pad layout (0.2" × 0.2" copper), not enhanced heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VBR (min/max) | 209 V / 231 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 328 V at 2.0 A - Clamped voltage under full-rated 10/1000 µs surge; determines protected circuit's peak stress level. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates protection capability against IEC 61000-4-5 surges. |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); supports high-energy inductive switching transients. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height. |
Pinout & Package
Package: SMB (DO-214AA), molded epoxy case with matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Defines polarity-sensitive placement - must be tied to ground or return path when protecting positive rail. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line. | Ensures correct orientation for clamping action - reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensors. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge events on 50 Ω source impedance without degradation. |
| Glass passivated junction | Provides stable VBR drift <0.1 %/°C and long-term leakage stability - critical for precision analog front-ends. |
| MSL Level 1 (260 °C) | Enables lead-free reflow without popcorn cracking or delamination - compatible with standard SMT production lines. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes let-through voltage during clamping - reduces stress on downstream MOSFETs, microcontrollers, and interface ICs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V CAN/LIN bus power inputs in vehicle ECUs from load-dump transients up to 35 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and LDO input, absorbing >95 % of surge energy before it reaches regulation stage. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic supplies during 12 V system load dump; validated per AEC-Q101 stress profiles. |
Use Scenario: Shielding 4–20 mA current-loop transmitters and RS-485 nodes in factory automation PLCs from field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-clamp protector on signal/power pair, triggered only above 188 V to avoid interference with normal 24 V loop operation. Use Value: Maintains signal integrity during lightning-induced common-mode transients on long cable runs while preserving loop accuracy within ±0.1 %. |
| Telecom AC/DC Adapter Input | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding primary-side rectifier outputs in universal-input offline SMPS used in telecom infrastructure equipment. IC Role / Device Role / Timing Role: Secondary-stage overvoltage clamp after bridge rectifier, limiting peak voltage seen by bulk capacitor and PFC controller. Use Value: Enables use of 200 V-rated electrolytic capacitors instead of 250 V parts - reducing BOM cost and board area without compromising surge margin. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Snubber-style TVS across motor terminals, clamping inductive kickback to ≤328 V during PWM switching transitions. Use Value: Eliminates need for RC snubbers and associated heat dissipation; extends MOSFET lifetime by reducing VDS overshoot beyond 80 % of rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHM3_A/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and pinout. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy (e.g., EU auto Tier 1). | Direct material substitution if halogen-free requirement applies; no design or layout change needed. |
| SMCJ188AHE3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM, higher IPPM (4.4 A), RθJA = 50 °C/W. | Used where higher single-event surge margin or improved thermal derating is required (e.g., outdoor telecom cabinets). | Choose when 600 W is insufficient; requires PCB footprint revision and increased pad area for thermal performance. |
Compared with SMBJ188AHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMCJ188AHE3_A/H delivers 2.5× higher surge power in a larger package - enabling extended lifetime in high-duty-cycle industrial environments.
Availability
SMBJ188AHE3_A/H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, telecom AC/DC adapter input staging, and consumer appliance motor drive circuits requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ188AHE3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for fast clamping, low leakage, and robust surge endurance in harsh thermal and electrical environments.
FAQ
What is the maximum clamping voltage of the SMBJ188AHE3_A/H under rated surge conditions?
The SMBJ188AHE3_A/H has a maximum clamping voltage (VC) of 328 V when subjected to its rated peak pulse current of 2.0 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within absolute maximum ratings.
Is SMBJ188AHE3_A/H suitable for automotive applications?
Yes, SMBJ188AHE3_A/H is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (suffix HE3 denotes RoHS-compliant + AEC-Q101). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per automotive requirements - making it appropriate for engine control units, body electronics, and ADAS sensor power rails.
What does the "HE3" suffix indicate in SMBJ188AHE3_A/H?
The "HE3" suffix in SMBJ188AHE3_A/H indicates RoHS-compliant construction with AEC-Q101 qualification. "H" denotes automotive grade, "E3" specifies commercial-grade RoHS compliance (matte tin plating, JESD201 Class 2 whisker resistance), and "_A/H" refers to tape-and-reel packaging (7″ reel, 750 pcs) and revision code A. It is not a halogen-free part - that would be HM3.
How does SMBJ188AHE3_A/H differ from bidirectional variants like SMBJ188CA?
SMBJ188AHE3_A/H is unidirectional with cathode-band polarity, intended for DC rail protection where polarity is fixed. In contrast, SMBJ188CA is bidirectional - symmetrical clamping in both directions - used for AC lines or data buses like RS-485. The unidirectional SMBJ188AHE3_A/H offers lower leakage (<1.0 µA vs. ≤2.0 µA) and higher IFSM (100 A vs. N/A), but cannot protect AC signals without external rectification.
What is the thermal resistance specification for SMBJ188AHE3_A/H?
SMBJ188AHE3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and a junction-to-ambient resistance (RθJA) of 100 °C/W under standard mounting conditions (0.2″ × 0.2″ copper pads per terminal). These values govern thermal derating above 25 °C ambient and inform layout decisions for sustained surge duty cycles - especially in enclosed automotive or industrial enclosures.
SMBJ188AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ188AHE3_A/H FAQ
1.How can I place an order for SMBJ188AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHE3_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 SMBJ188AHE3_A/H reliable?
The price and inventory of SMBJ188AHE3_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 SMBJ188AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ188AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHE3_A/H?
SMBJ188AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHE3_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 SMBJ188AHE3_A/H?
For technical support, including SMBJ188AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ188AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHE3_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 SMBJ188AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ188AHE3_A/H?
All SMBJ188AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHE3_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 SMBJ188AHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ188AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHE3_A/H 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 …
