My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ188CA-M3/52
;;2.jpg)
- Part No.:
- SMBJ188CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ188CA-M3/52.pdf
- Description:
- TVS DIODE 188VWM 328VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,297
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ188CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features 188 V stand-off voltage (VWM), 209–231 V breakdown voltage (VBR), 328 V maximum clamping voltage (VC) at 2.0 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ188CA-M3/52 datasheet, SMBJ188CA-M3/52 pinout, SMBJ188CA-M3/52 application, or SMBJ188CA-M3/52 equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), JEDEC-compliant SMB package dimensions, and direct alternative part comparisons - all validated against Vishay Document #88392 (Rev. 09-Jan-2024).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (209–231 V), VC = 328 V at IPPM = 2.0 A, and ID ≤ 1.0 µA at VWM = 188 V. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for suppressing ESD and lightning-induced surges in DC power rails.
The device complies with AEC-Q101 when ordered with HE3/HM3 suffixes, but SMBJ188CA-M3/52 is halogen-free RoHS-compliant commercial grade. It uses matte tin-plated leads, meets MSL Level 1 (260 °C reflow), and is rated for TJ = –55 to +150 °C operation - suitable for high-reliability industrial environments without automotive qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 188 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 209 V / 231 V at IT = 1.0 mA - guaranteed breakdown range ensures predictable clamping onset across temperature and lot variation. |
| VC @ IPPM | 328 V at IPPM = 2.0 A (10/1000 µs) - peak clamped voltage seen by protected circuit during worst-case transient event. |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 µs surge waveform; determines transient energy absorption capacity. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage at rated stand-off voltage, minimizing standby power loss in high-impedance circuits. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; sets derating curve for sustained power dissipation. |
| TJ max. | +150 °C - maximum junction temperature rating; supports operation in enclosed industrial enclosures with limited airflow. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band omitted per bidirectional marking convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical junction; accepts surge current regardless of polarity due to bidirectional structure. |
| Cathode | Transient current exit (negative polarity) | Second terminal of symmetrical junction; completes low-impedance path during overvoltage events in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal lines. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 12–48 V DC rails without degradation when properly mounted. |
| Low clamping ratio (VC/VBR ≈ 1.52) | Minimizes voltage overshoot during clamping - protects 200 V-rated MOSFETs and isolated gate drivers with safety margin. |
| MSL Level 1 moisture sensitivity | Enables standard SMT assembly without dry-pack or baking - reduces manufacturing cost and process complexity. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements for green electronics programs and export compliance. |
Applications
| Industrial Power Supply Protection | Telecom Line Card Surge Suppression |
|---|---|
|
Use Scenario: Protecting 48 V DC input stage of programmable logic controller (PLC) power module against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp positive/negative spikes before they reach upstream DC/DC converter and microcontroller. Use Value: Limits transient voltage to ≤328 V, preventing damage to 60 V-rated input capacitors and enabling use of lower-cost 50 V input-stage components. |
Use Scenario: Safeguarding Ethernet PHY interface on telecom base station line card exposed to lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: TVS connected between differential pairs (e.g., TX+/TX−) and chassis ground to shunt common-mode surges. Use Value: Sub-1 ns response time ensures clamping occurs before PHY transceiver latch-up, preserving data integrity during 10/1000 µs surge events. |
| Automotive Body Control Module (BCM) Input Protection | Sensor Signal Line ESD Protection |
|
Use Scenario: Guarding 12 V battery-fed inputs of BCM against jump-start transients and alternator load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary TVS on main power rail, downstream of fuse and upstream of LDO regulators and CAN transceivers. Use Value: Withstands 600 W pulses up to 100 ms duration (derated), meeting ISO 16750-2 requirements for 12 V systems without thermal runaway. |
Use Scenario: Shielding analog output of pressure sensor (0–5 V) in HVAC control unit from ESD events during connector mating/unmating. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at sensor connector pins to divert ±8 kV contact discharge (IEC 61000-4-2). Use Value: 1.0 µA leakage at 188 V ensures no measurable offset error in 12-bit ADC measurements, preserving sensor accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3 suffix); tin-lead compatible plating. | Preferred for legacy leaded assembly or mixed-technology boards where halogen-free mandate does not apply. | Select E3 if halogen-free requirement is waived and compatibility with SnPb reflow profiles is needed. |
| SMCJ188CA-M3 | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; higher RθJA (60 °C/W) and 1500 W PPPM rating. | Used where higher surge energy handling or improved thermal performance is required, e.g., outdoor power converters. | Choose SMCJ188CA-M3 only if board space allows larger footprint and 1500 W surge margin is mandatory. |
Compared with SMBJ188CA-M3/52, the E3 variant offers identical protection performance with different plating chemistry, while the SMCJ188CA-M3 provides 2.5× higher pulse power in a physically larger package - making SMBJ188CA-M3/52 optimal for space-constrained 600 W surge protection where halogen-free compliance is required.
Availability
SMBJ188CA-M3/52 is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line card surge suppression, and sensor signal line ESD protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ188CA-M3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series targets cost-sensitive, high-volume transient protection needs in industrial, telecom, and consumer electronics - delivering standardized TVS performance in compact SMB packages with consistent MSL and RoHS compliance.
FAQ
What is the clamping voltage of SMBJ188CA-M3/52 at its rated peak pulse current?
The SMBJ188CA-M3/52 has a maximum clamping voltage (VC) of 328 V when subjected to its specified peak pulse current (IPPM) of 2.0 A using the 10/1000 µs waveform. This value is measured per Figure 1 in Vishay Document #88392 and represents the upper limit of voltage the protected circuit will experience during a standardized surge event. The SMBJ188CA-M3/52 maintains this clamping performance bidirectionally, ensuring consistent protection regardless of transient polarity.
Is SMBJ188CA-M3/52 suitable for automotive applications?
SMBJ188CA-M3/52 is a commercial-grade, halogen-free RoHS-compliant TVS diode and is not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ188CA-HM3_X variant (with "_X" denoting revision code), which adds AEC-Q101 qualification while retaining identical electrical parameters. The SMBJ188CA-M3/52 may be used in non-safety-critical automotive subsystems only after full system-level validation - but SMBJ188CA-M3/52 itself carries no automotive qualification.
How does the bidirectional design of SMBJ188CA-M3/52 affect PCB layout?
The SMBJ188CA-M3/52 has no polarity marking (no cathode band), reflecting its symmetrical bidirectional structure. This allows placement in either orientation across differential lines or floating rails without concern for anode/cathode alignment. Unlike unidirectional TVS diodes, SMBJ188CA-M3/52 eliminates risk of reverse installation and simplifies layout for AC-coupled interfaces such as RS-485, CAN FD, or Ethernet PHY protection - reducing design review cycles and field failure modes related to orientation errors.
What is the thermal resistance of SMBJ188CA-M3/52, and how does it impact power derating?
The SMBJ188CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value governs its steady-state power dissipation limit: at TA = 50 °C, its rated DC power (PD) is 5.0 W. For transient events, derating follows Figure 2 in Document #88392 - e.g., at TJ = 125 °C, peak pulse power must be reduced to ~70 % of 600 W. Proper pad sizing and thermal vias are essential to maintain SMBJ188CA-M3/52 within safe operating limits during repetitive surges.
Can SMBJ188CA-M3/52 replace SMBJ180CA-M3/52 in an existing design?
Yes - SMBJ188CA-M3/52 and SMBJ180CA-M3/52 share identical SMB (DO-214AA) package, pinout, and mounting requirements, and both are bidirectional. However, SMBJ188CA-M3/52 has higher VWM (188 V vs. 180 V) and VBR (209–231 V vs. 200–221 V), resulting in 8 V higher clamping threshold. Substitution is acceptable only if the protected circuit's voltage tolerance accommodates this increase; otherwise, overvoltage exposure during marginal transients may occur. Always verify VC margin against downstream component ratings before replacing SMBJ180CA-M3/52 with SMBJ188CA-M3/52.
SMBJ188CA-M3/52 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ188CA-M3/52 FAQ
1.How can I place an order for SMBJ188CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ188CA-M3/52 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 SMBJ188CA-M3/52 reliable?
The price and inventory of SMBJ188CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ188CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ188CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ188CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ188CA-M3/52?
SMBJ188CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ188CA-M3/52 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 SMBJ188CA-M3/52?
For technical support, including SMBJ188CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ188CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ188CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ188CA-M3/52 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 SMBJ188CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ188CA-M3/52?
All SMBJ188CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ188CA-M3/52, 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 SMBJ188CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ188CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ188CA-M3/52 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 …
