My Inquiry
My Account
Taiwan Semiconductor Corporation SMBJ150CAH
- Part No.:
- SMBJ150CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150CAH.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,186
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ150CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 150 V working stand-off voltage (VWM), 243 V maximum clamping voltage (VC@IPP) at 2.5 A peak impulse current, and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ150CAH datasheet, SMBJ150CAH pinout, SMBJ150CAH application, or SMBJ150CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and low leakage (<1 µA above 10 V) for battery-sensitive systems.
Technical Context
The SMBJ150CAH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its breakdown voltage range is 167–185 V at 1 mA test current, with clamping occurring within 1 ps - enabling protection of CAN, LIN, and sensor interfaces against EFT and load-dump events.
Thermally, it supports junction temperatures from –55 °C to +150 °C and exhibits RθJC = 10 °C/W and RθJA = 55 °C/W. Its unidirectional counterpart SMBJ150CH shares identical VWM and VC but differs in forward voltage behavior; SMBJ150CAH maintains symmetric clamping in both polarities without rectification function.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 167 / 185 V @ 1 mA - Ensures reliable triggering above system nominal rail |
| VC@IPP | 243 V @ 2.5 A (10/1000 µs) - Limits downstream voltage stress during surge |
| PPK | 600 W - Withstands automotive load-dump transients per ISO 7637-2 |
| ID@VWM | <1 µA - Minimizes standby power loss in always-on circuits |
| Response time | <1 ps - Faster than most microsecond-scale transients, enabling real-time clamping |
| TJ max | +150 °C - Supports under-hood automotive placement without derating |
Pinout & Package
DO-214AA (SMB) surface-mount package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band marking for polarity identification. Bidirectional configuration means no anode/cathode functional distinction - terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked end) | Transient return path (bidirectional) | Functions identically as cathode; marking indicates polarity reference only, not directional conduction |
| Cathode (unmarked end) | Transient return path (bidirectional) | Electrically identical to marked terminal; device clamps equally in both directions |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive spike), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (EFT) waveforms |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - compatible with standard SMT assembly processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle power distribution networks from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across supply rail and ground to shunt energy before reaching ECUs or body controllers. Use Value: Limits rail voltage to ≤243 V during 600 W surges, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in factory automation equipment exposed to relay switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to absorb EFT bursts before signal conditioning circuitry. Use Value: Sub-1 ps response ensures clamping occurs before 10 ns rise-time transients propagate into op-amp front-ends. |
| LED Lighting Driver Protection | Communication Bus Transient Suppression |
Use Scenario: Shielding constant-current LED drivers in streetlight systems from lightning-induced surges on AC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk DC bus after bridge rectifier and before buck controller. Use Value: 600 W peak power rating handles multi-millisecond surges while maintaining <1 µA leakage at 150 V nominal bus. | Use Scenario: Adding robustness to CAN FD or LIN physical layers in harsh environments like agricultural machinery. IC Role / Device Role / Timing Role: Differential-line TVS connected between CAN_H/CAN_L to suppress common-mode transients without distorting data eye. Use Value: Symmetric bidirectional clamping preserves signal integrity while limiting differential voltage excursion to ≤243 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ150CA | Same VWM (150 V), slightly higher VC (250 V @ 2.5 A), identical DO-214AC (SMA) footprint but smaller thermal mass | Lower PPK (400 W) limits suitability for ISO 7637-2 Pulse 5a load-dump events | Select when board space is constrained and surge energy is limited to ≤400 W |
| ON Semiconductor 1.5SMC150CA | Same VWM and bidirectional configuration, but DO-214AB (SMC) package - larger footprint and higher RθJA (40 °C/W) | Higher thermal inertia allows longer surge duration handling but requires larger PCB pad area | Select when sustained surge duty cycle exceeds single-pulse rating and layout permits SMC size |
Compared with SMBJ150CAH, SMAJ150CA offers smaller form factor but reduced surge margin, while 1.5SMC150CA provides greater thermal robustness at the cost of board area - SMBJ150CAH balances automotive-grade reliability, compact SMB packaging, and full 600 W ISO-compliant performance.
Availability
SMBJ150CAH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC I/O modules, and LED driver designs requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMBJ150CAH 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 automotive power domains and industrial control systems where high clamping accuracy and fast response are critical.
FAQ
What does the 'CAH' suffix indicate in SMBJ150CAH?
The 'CAH' suffix denotes a bidirectional TVS diode in the SMBJH series with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional variants (e.g., SMBJ150CH), SMBJ150CAH clamps symmetrically in both polarities, making it ideal for protecting differential buses or AC-coupled signal paths without polarity concerns.
Is SMBJ150CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
No - SMBJ150CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which requires higher energy handling (≥1000 W). Its 600 W PPK rating aligns with lower-energy transients; for load dump, consider higher-power alternatives like 5.0SMDJ150CA or dedicated load-dump suppressors.
What is the maximum clamping voltage of SMBJ150CAH under standard test conditions?
The maximum clamping voltage VC of SMBJ150CAH is 243 V when subjected to a 10/1000 µs waveform at 2.5 A peak impulse current (IPP), measured per ANSI/IEEE C62.35. This value ensures downstream components see voltage limited to ≤243 V during transient events.
Does SMBJ150CAH require special PCB layout considerations?
Yes - to preserve its <1 ps response, minimize trace inductance by placing SMBJ150CAH directly across protected nodes with short, wide traces and low-inductance grounding. Avoid vias in current paths; use solid ground planes beneath the DO-214AA footprint to reduce loop inductance and maintain clamping effectiveness.
How does SMBJ150CAH differ from SMBJ150AH?
SMBJ150AH is unidirectional with cathode/anode polarity and conducts forward current, whereas SMBJ150CAH is bidirectional with symmetrical clamping in both directions and no net DC conduction path. SMBJ150CAH replaces two unidirectional devices in differential applications and eliminates polarity installation errors.
SMBJ150CAH 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:
- 243V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
SMBJ150CAH FAQ
1.How can I place an order for SMBJ150CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150CAH 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 SMBJ150CAH reliable?
The price and inventory of SMBJ150CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150CAH is usually 5 days.
3.What payment methods are accepted for SMBJ150CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150CAH?
SMBJ150CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150CAH 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 SMBJ150CAH?
For technical support, including SMBJ150CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150CAH requirements.
6.How does Aetrix verify that SMBJ150CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ150CAH 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 SMBJ150CAH meets industry standards.
7.What is the process for return or replacement of SMBJ150CAH?
All SMBJ150CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150CAH, 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 SMBJ150CAH part is unused and in its original packaging.
Return procedure for SMBJ150CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ150CAH 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…
