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Vishay General Semiconductor - Diodes Division SMBJ188AHM3_A/H
- Part No.:
- SMBJ188AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188AHM3_A/H.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ188AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), 328 V clamping voltage (VC) at 2.0 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives and telecom interface circuits.
For engineers reviewing the SMBJ188AHM3_A/H datasheet, SMBJ188AHM3_A/H pinout, SMBJ188AHM3_A/H application, or SMBJ188AHM3_A/H equivalent, key selection criteria include verified clamping performance under 10/1000 µs surge, unidirectional polarity with cathode band marking, thermal resistance (RθJA = 100 °C/W), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when reverse voltage exceeds VBR, limiting transient energy to protected ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), critical for suppressing ESD and inductive switching spikes.
The SMBJ188AHM3_A/H is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance junction-to-ambient (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC rail margin for 200 V nominal systems. |
| VBR (min/max) | 209 V / 231 V at 1.0 mA - verified breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 328 V at 2.0 A (10/1000 µs) - clamped voltage seen by downstream circuitry during standardized surge event. |
| PPPM | 600 W - peak transient power handling capability under industry-standard 10/1000 µs waveform with 0.01% duty cycle. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss in high-impedance sensor interfaces. |
| TJ max. | +150 °C - enables operation in under-hood automotive modules and industrial enclosures without derating penalties. |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height for automated placement. |
Pinout & Package
Package: SMB (DO-214AA), unidirectional configuration with cathode indicated by molded band on case body. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during overvoltage events. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 200 V DC bus); band-marked end accepts positive surge relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 200 V systems without cascaded staging. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure per JESD22-A110. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration requirements and supports green manufacturing compliance for export markets. |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-bake requirement and supports standard SMT assembly flow without moisture sensitivity risk. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., relay coil flyback), improving protection margin for SiC MOSFET gates. |
Applications
| Industrial Motor Drives | Telecom Power Interfaces |
|---|---|
Use Scenario: Protection of 200 V DC link in servo drive inverters against IGBT switching-induced voltage spikes and load dump transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed across DC bus terminals to limit transient excursions below 330 V. Use Value: Prevents gate oxide rupture in 250 V-rated SiC MOSFETs by clamping surges to 328 V with sub-1 ns response. |
Use Scenario: Surge suppression on -48 V telecom rectifier output feeding base station control boards. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing lightning-induced common-mode surges coupled onto DC distribution lines. Use Value: Maintains 1.0 µA leakage at -48 V rail, avoiding false triggering of upstream OVP circuits while surviving 600 W pulses. |
| Automotive Body Control Modules | Industrial PLC Analog Inputs |
Use Scenario: Input protection for LIN bus transceivers and microcontroller I/O pins exposed to battery line transients (ISO 7637-2 Pulse 1/2a). IC Role / Device Role / Timing Role: Unidirectional TVS connected between LIN line and chassis ground to shunt negative-going spikes. Use Value: Qualified to AEC-Q101 (via HM3 suffix) and withstands 100 A non-repetitive forward surge (IFSM), supporting harsh vehicle environments. |
Use Scenario: Overvoltage safeguard for 4–20 mA current loop receivers interfacing with field sensors in factory automation. IC Role / Device Role / Timing Role: High-VWM TVS placed across input terminals to block >188 V faults while passing normal 24 V supply transients. Use Value: 188 V VWM allows compatibility with 24 V systems experiencing 100 V inductive kick, preventing false trips in safety-critical analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188AHE3_A/H | RoHS-compliant but not halogen-free; same electrical specs and SMB package. | Lacks halogen-free certification required for certain EU industrial equipment standards (e.g., EN 61000-6-4 Annex ZA). | Select when halogen content is unrestricted and cost optimization is prioritized over green compliance. |
| SMCJ188A-HM3_A/H | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package with higher RθJA (60 °C/W) and 1500 W PPPM rating. | Supports higher-energy surges but requires 30% more PCB area and different pad layout. | Choose when system-level surge testing exceeds 600 W or thermal management demands lower junction rise. |
Compared with SMBJ188AHM3_A/H, the HE3 variant trades halogen-free status for slightly lower unit cost, while the SMCJ188A-HM3_A/H offers superior power handling at the expense of footprint and thermal design flexibility - making SMBJ188AHM3_A/H optimal for space-constrained 600 W-class protection where green compliance is mandatory.
Availability
SMBJ188AHM3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, telecom power interfaces, automotive body control modules, and industrial PLC analog inputs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMBJ188AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-energy transient suppression in demanding environments - targeting industrial, automotive, and telecom applications where precise clamping, low leakage, and AEC-Q101 qualification matter.
FAQ
What is the clamping voltage of SMBJ188AHM3_A/H at its rated peak pulse current?
The SMBJ188AHM3_A/H has a maximum clamping voltage (VC) of 328 V when subjected to its specified peak pulse current of 2.0 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ188AHM3_A/H maintains this clamping performance consistently across its operating temperature range.
Is SMBJ188AHM3_A/H suitable for automotive applications?
Yes, SMBJ188AHM3_A/H is qualified to AEC-Q101 when ordered with the HM3 suffix, as confirmed in Vishay's ordering information table and thermal characteristics notes. Its 150 °C maximum junction temperature, MSL Level 1 rating, and JESD201 Class 2 whisker resistance make it appropriate for under-hood and body control module deployments. The SMBJ188AHM3_A/H meets automotive reliability stress tests including temperature cycling and humidity bias HAST.
How does the HM3 suffix differ from the HE3 suffix in SMBJ188A variants?
The HM3 suffix denotes halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, whereas HE3 is RoHS-compliant but contains halogens. Both share identical electrical specifications, SMB package dimensions, and AEC-Q101 qualification. The SMBJ188AHM3_A/H is selected when regulatory compliance mandates halogen-free materials - such as for CE-marked industrial equipment sold in the EU - while SMBJ188AHE3_A/H serves cost-sensitive commercial applications without that restriction.
What is the reverse leakage current of SMBJ188AHM3_A/H at its stand-off voltage?
At its 188 V stand-off voltage (VWM), the SMBJ188AHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance analog paths and avoids loading effects in precision current-loop receivers. Leakage remains below 5.0 µA up to 125 °C, ensuring stable operation across extended industrial temperature ranges.
Can SMBJ188AHM3_A/H be used in bidirectional protection configurations?
No, SMBJ188AHM3_A/H is a unidirectional TVS diode, identifiable by its cathode band marking and specified only for reverse-biased clamping operation. For bidirectional protection, Vishay offers the SMBJ188CA variant (with CA suffix), which provides symmetrical clamping in both polarities. Using SMBJ188AHM3_A/H in bidirectional applications would result in forward conduction and failure during positive transients - the SMBJ188AHM3_A/H must be applied with correct polarity alignment relative to the protected line.
SMBJ188AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ188AHM3_A/H FAQ
1.How can I place an order for SMBJ188AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188AHM3_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 SMBJ188AHM3_A/H reliable?
The price and inventory of SMBJ188AHM3_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 SMBJ188AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ188AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188AHM3_A/H?
SMBJ188AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188AHM3_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 SMBJ188AHM3_A/H?
For technical support, including SMBJ188AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ188AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ188AHM3_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 SMBJ188AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ188AHM3_A/H?
All SMBJ188AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188AHM3_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 SMBJ188AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ188AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188AHM3_A/H Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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