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Vishay General Semiconductor - Diodes Division SMBJ188A-E3/52
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- Part No.:
- SMBJ188A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188A-E3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
SMBJ188A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for 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 (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - deployed on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ188A-E3/52 datasheet, SMBJ188A-E3/52 pinout, SMBJ188A-E3/52 application, or SMBJ188A-E3/52 equivalent, key selection criteria include clamping performance under 2.0 A surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity with cathode band marking, and RoHS-compliant matte tin-plated leads suitable for J-STD-002 soldering.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches to divert surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the SMB package supports automated placement and meets MSL Level 1 reflow profile (peak 260 °C).
The device is rated for -55 °C to +150 °C operating junction temperature, with 5.0 W steady-state power dissipation on infinite heatsink at 50 °C ambient. Its 0.108 %/°C VBR temperature coefficient enables predictable clamping across temperature, and its 20 °C/W junction-to-lead thermal resistance supports localized heat transfer in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 209 V / 231 V at 1 mA - guaranteed avalanche onset range defining protection threshold |
| VC @ IPPM | 328 V at 2.0 A - clamped voltage during 10/1000 µs surge, limiting stress on protected circuitry |
| PPPM | 600 W - peak transient energy handling capacity per single 10/1000 µs pulse |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for derating above 25 °C |
| Polarity | Unidirectional - cathode marked by band; blocks forward conduction, clamps reverse transients |
| Package | SMB (DO-214AA) - 0.220" × 0.155" footprint, compatible with standard SMT pick-and-place |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by black band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes clamping path during reverse transient |
| Cathode | High-side connection point | Connected to protected line (e.g., 200 V DC rail); avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges on high-voltage DC bus lines |
| Clamping voltage ≤328 V at 2.0 A | Provides ≥12 V margin below typical 340 V DC link max in industrial 3-phase rectifier outputs |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without moisture-induced popcorn failure |
| Glass passivated junction | Ensures stable VBR tolerance and <1.0 µA leakage at 188 V, minimizing standby power loss |
| RoHS-compliant, matte tin plating | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 |
Applications
| Industrial Motor Drive DC Link Protection | Telecom Power Supply Input Stage |
|---|---|
|
Use Scenario: Installed across 200–300 V DC bus in variable-frequency drives to suppress switching spikes from IGBTs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp absorbing repetitive 600 W transients during PWM commutation. Use Value: Limits voltage overshoot to ≤328 V, preventing gate oxide rupture in 600 V IGBT modules. |
Use Scenario: Placed at AC-DC converter input to protect bridge rectifier and PFC controller from lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt protector clamping line-to-line transients within nanoseconds. Use Value: Withstands 2.0 A 10/1000 µs pulses while maintaining <1.0 µA leakage at 188 V, preserving no-load efficiency. |
| Automotive On-Board Charger (OBC) HV Side | Renewable Energy Inverter DC Bus |
|
Use Scenario: Mounted on high-voltage battery interface of 400 V OBC to suppress load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional transient suppressor referenced to chassis ground, triggered only on overvoltage events. Use Value: AEC-Q101 qualified variants available; this E3/52 version offers identical clamping and thermal specs for non-automotive use. |
Use Scenario: Applied across PV string output or battery bank terminals in solar microinverters to handle grid-switching transients. IC Role / Device Role / Timing Role: Standoff-rated TVS ensuring continuous operation up to 188 V while clamping >209 V spikes. Use Value: 150 °C max junction temperature rating supports reliable operation in outdoor enclosures with passive cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188A-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in circuit function or layout; selected where halogen-free compliance is mandated | Choose M3/52 when environmental compliance requires halogen-free materials without altering design |
| SMCJ188A-E3/52 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; RθJA = 50 °C/W vs. 100 °C/W | Higher thermal mass allows higher average surge duty cycle; requires 30% larger PCB area | Choose SMCJ188A-E3/52 when thermal derating limits require lower junction temperature rise under repeated surges |
Compared with SMBJ188A-E3/52, the M3/52 alternative provides identical protection performance with halogen-free construction, while the SMCJ188A-E3/52 delivers superior thermal management at the cost of increased board space - enabling longer surge endurance in high-repetition industrial environments.
Availability
SMBJ188A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and high-voltage DC systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ188A-E3/52 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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in space-constrained, high-voltage applications - targeting industrial automation, telecom infrastructure, and renewable energy systems where consistent clamping and thermal stability are critical.
FAQ
What is the maximum clamping voltage of SMBJ188A-E3/52 and under what test condition?
The SMBJ188A-E3/52 has a maximum clamping voltage (VC) of 328 V, measured at a peak pulse current (IPPM) of 2.0 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events, and is confirmed in Vishay's datasheet Document Number 88392, page 2.
Is SMBJ188A-E3/52 suitable for bidirectional transient protection?
No, SMBJ188A-E3/52 is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current. For bidirectional protection, Vishay specifies the CA-suffix variant (e.g., SMBJ188CA). The "A" suffix in SMBJ188A-E3/52 explicitly denotes unidirectional polarity, with cathode identified by a band on the SMB package body.
What is the thermal resistance and how does it affect SMBJ188A-E3/52 derating?
SMBJ188A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. At ambient temperatures above 25 °C, its peak pulse power must be linearly derated - for example, at 75 °C ambient, maximum PPPM drops to 300 W. This derating is defined in Figure 2 of the Vishay datasheet and directly impacts sustained surge handling in enclosed or high-temperature environments.
Does SMBJ188A-E3/52 meet automotive qualification standards?
The base SMBJ188A-E3/52 is commercial-grade and not AEC-Q101 qualified. However, Vishay offers automotive variants under ordering codes SMBJ188AHE3_X (RoHS + AEC-Q101) and SMBJ188AHM3_X (halogen-free + AEC-Q101), where "_X" denotes revision letter. These share identical electrical specs but undergo additional stress testing for automotive under-hood applications.
What is the standoff voltage and how does it relate to system operating voltage?
The standoff voltage (VWM) of SMBJ188A-E3/52 is 188 V - the maximum DC or RMS voltage the device can withstand continuously without entering avalanche. It must be ≥10–15% above the system's normal operating voltage (e.g., 170 V DC bus) to avoid leakage or premature conduction, while still allowing sufficient margin below the clamping voltage (328 V) to protect downstream components.
SMBJ188A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ188A-E3/52 FAQ
1.How can I place an order for SMBJ188A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188A-E3/52 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 SMBJ188A-E3/52 reliable?
The price and inventory of SMBJ188A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ188A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188A-E3/52?
SMBJ188A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188A-E3/52 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 SMBJ188A-E3/52?
For technical support, including SMBJ188A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188A-E3/52 requirements.
6.How does Aetrix verify that SMBJ188A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ188A-E3/52 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 SMBJ188A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ188A-E3/52?
All SMBJ188A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188A-E3/52, 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 SMBJ188A-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ188A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188A-E3/52 Tags
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