My Inquiry
My Account
Taiwan Semiconductor Corporation SMBJ150CH
- Part No.:
- SMBJ150CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150CH.pdf
- Description:
- 600W, 185.5V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,363
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ150CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 150V working stand-off voltage (VWM), 266V maximum clamping voltage (VC@IPP), 600W peak pulse power rating (10/1000µs), and AEC-Q101 qualification - deployed in 12V–48V DC power distribution networks to protect CAN transceivers, microcontrollers, and sensor interfaces.
For engineers reviewing the SMBJ150CH datasheet, SMBJ150CH pinout, SMBJ150CH application, or SMBJ150CH equivalent, key selection criteria include unidirectional vs. bidirectional configuration (CH suffix = bidirectional), clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction-to-ambient thermal resistance (55°C/W), and compliance with JESD201 Class 2 whisker resistance and RoHS/halogen-free requirements.
Technical Context
The SMBJ150CH operates as a silicon avalanche diode with glass-passivated junction, enabling sub-1ps response time and stable breakdown behavior across -55°C to +150°C junction temperature range. Its bidirectional architecture supports symmetrical clamping in both polarities, eliminating need for polarity-aware placement in AC-coupled or floating signal lines.
It meets ISO 7637-2 immunity standards for automotive electronics and delivers 2.3A peak impulse current (IPP) at 150V VWM, with 266V clamping limiting transient energy delivered to downstream ICs. Thermal design is supported by RθJA = 55°C/W and RθJC = 10°C/W, enabling reliable operation under sustained ambient temperatures up to 125°C when mounted on 1-in² copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail margin for 48V systems. |
| VBR min/max | 167 V / 204 V @ 1 mA - Confirmed breakdown threshold range ensures consistent turn-on across production lots. |
| VC@IPP | 266 V @ 2.3 A (10/1000µs) - Clamping voltage limits transient stress on protected ICs during load dump events. |
| PPK | 600 W - Peak pulse power handling capacity per single 10/1000µs surge, validated per ANSI/IEEE C62.35. |
| IPP | 2.3 A - Maximum non-repetitive surge current the device safely clamps without degradation. |
| TJ max | +150 °C - Maximum junction temperature rating enables use in under-hood automotive environments. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance determines required PCB copper area for thermal management. |
Pinout & Package
Package: DO-214AA (SMB) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and polarity indicated by cathode band (not applicable for bidirectional SMBJ150CH; symmetric terminal function).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; electrically identical to Terminal 2 in bidirectional mode. |
| Cathode (Terminal 2) | Transient current entry (positive polarity) | Accepts reverse surge current during positive transients; electrically identical to Terminal 1 in bidirectional mode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| Sub-1ps response time | Enables suppression of fast-rising ESD events (IEC 61000-4-2) before sensitive ICs experience latch-up or gate oxide damage. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms. |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes without floor-life restrictions. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V battery-fed ECUs from load dump and alternator surge events per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional TVS placed at power entry point to clamp transients before they reach PMICs and MCU voltage regulators. Use Value: Limits clamped voltage to 266V, preventing overvoltage failure of 36V-rated input stages in automotive power management ICs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-clamping TVS on differential signal pairs to absorb EFT bursts (IEC 61000-4-4) without distorting low-frequency signals. Use Value: Sub-1ps response preserves signal integrity while 1 µA leakage at 150V ensures no DC offset error in precision 4–20mA loops. |
| LED Driver Input Protection | RS-485 Transceiver Bus Line Protection |
Use Scenario: Shielding constant-current LED drivers in streetlight controllers from induced lightning surges on long DC feeder lines. IC Role / Device Role / Timing Role: Primary surge suppression element placed upstream of input capacitors and MOSFET switches. Use Value: 600W peak power rating handles multi-kV transients without thermal runaway, extending driver lifetime in outdoor deployments. |
Use Scenario: Protecting RS-485 transceivers (e.g., THVD1550) on factory automation bus lines subject to ground potential differences and cable coupling. IC Role / Device Role / Timing Role: Bidirectional TVS on A/B bus lines to clamp common-mode and differential surges simultaneously. Use Value: Symmetrical 266V clamping prevents receiver input saturation and maintains bus fault tolerance up to ±35V common-mode range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150A | Unidirectional; VC = 243V @ 2.5A; same DO-214AC (SMA) package but smaller footprint and lower PPK (400W). | Requires polarity-aware layout; unsuitable for AC-coupled or floating bus lines where bidirectional clamping is mandatory. | Select only if board space is constrained and unidirectional protection suffices with lower clamping voltage. |
| Vishay SMA6J150A | Unidirectional; VC = 243V @ 2.5A; DO-214AC (SMA) package; AEC-Q101 qualified but lacks ISO 7637-2 Pulse 2b/3b validation in public documentation. | Lower thermal resistance (RθJA = 45°C/W) improves power dissipation margin, but missing full automotive surge waveform certification. | Prefer for cost-sensitive industrial designs where ISO 7637-2 compliance is not required and layout allows polarity orientation. |
Compared with SMBJ150CH, SMAJ150A offers tighter clamping but requires polarity-aware routing and lacks bidirectional capability, while SMA6J150A provides better thermal performance but omits documented ISO 7637-2 Pulse 2b/3b validation - making SMBJ150CH the only option fully certified for automotive power rail immunity across all five pulse types.
Availability
SMBJ150CH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver input surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ150CH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments, emphasizing robust clamping consistency, low leakage, and full ISO 7637-2 immunity coverage.
FAQ
What does the "CH" suffix indicate in SMBJ150CH?
The "CH" suffix in SMBJ150CH denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ150H), SMBJ150CH has no polarity marking and functions identically across both terminals - essential for protecting AC-coupled signals, differential buses like RS-485, or floating power domains where voltage reversal may occur.
Is SMBJ150CH compliant with ISO 7637-2, and which pulses does it cover?
Yes, SMBJ150CH is explicitly validated to meet ISO 7637-2 for Pulses 1, 2a, 2b, 3a, and 3b - covering inductive load dump, battery disconnect transients, and capacitive coupling events common in 12V/24V automotive systems. This full-pulse certification is confirmed in Taiwan Semiconductor's official A2102 datasheet and distinguishes SMBJ150CH from alternatives that only claim partial compliance or omit Pulse 2b/3b validation.
What is the maximum clamping voltage of SMBJ150CH, and how is it measured?
The maximum clamping voltage of SMBJ150CH is 266 V, measured at a peak impulse current (IPP) of 2.3 A using the standardized 10/1000 µs double-exponential surge waveform per ANSI/IEEE C62.35. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events and is guaranteed across the full operating temperature range (-55°C to +150°C).
Can SMBJ150CH be used in place of a unidirectional SMBJ150H?
No - SMBJ150CH cannot be directly substituted for SMBJ150H without layout review, because SMBJ150CH is bidirectional and lacks a cathode band, while SMBJ150H is unidirectional and requires correct polarity orientation. Replacing one with the other may result in improper clamping or open-circuit behavior during negative transients. Board redesign and schematic verification are required to switch configurations.
What is the thermal resistance profile of SMBJ150CH, and how does it affect PCB layout?
SMBJ150CH has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and junction-to-case (RθJC) of 10°C/W. To maintain TJ ≤ 150°C at full 600W surge duty, the PCB must provide ≥1 in² of 2-oz copper connected to both terminals. Insufficient copper area risks thermal runaway during repetitive surges - especially critical in enclosed automotive enclosures with limited airflow.
SMBJ150CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 266V
- Current - Peak Pulse (10/1000µs):
- 2.3A
- 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 (SMB)
SMBJ150CH FAQ
1.How can I place an order for SMBJ150CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150CH 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 SMBJ150CH reliable?
The price and inventory of SMBJ150CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150CH is usually 5 days.
3.What payment methods are accepted for SMBJ150CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150CH?
SMBJ150CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150CH 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 SMBJ150CH?
For technical support, including SMBJ150CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150CH requirements.
6.How does Aetrix verify that SMBJ150CH is sourced from the original manufacturer or authorized distributors?
All SMBJ150CH 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 SMBJ150CH meets industry standards.
7.What is the process for return or replacement of SMBJ150CH?
All SMBJ150CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150CH, 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 SMBJ150CH part is unused and in its original packaging.
Return procedure for SMBJ150CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ150CH 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
