My Inquiry
My Account
Taiwan Semiconductor Corporation 1KSMB16CAH
- Part No.:
- 1KSMB16CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB16CAH.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,152
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1KSMB16CAH from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor in DO-214AA (SMB) package, with breakdown voltage 15.2–16.8 V at 1 mA test current, clamping voltage 22.5 V at 44.4 A peak pulse current, and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the 1KSMB16CAH datasheet, 1KSMB16CAH pinout, 1KSMB16CAH application, or 1KSMB16CAH equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 1.0 ps response time, TJ max = 175°C, and moisture sensitivity level 1 per J-STD-020.
Technical Context
The 1KSMB16CAH implements a glass-passivated silicon avalanche junction optimized for fast transient suppression in bidirectional signal and power lines. It delivers sub-1.0 ps response from 0 V to VBR min and clamps transients up to 1000 W (10/1000 µs waveform) without degradation under repeated stress.
Designed for automotive ESD and load-dump immunity, it meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling), with thermal resistance RθJA = 100°C/W and RθJL = 20°C/W enabling reliable operation in high-ambient environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 15.2 V / 16.8 V - defines minimum and maximum guaranteed breakdown threshold at 1 mA, ensuring predictable turn-on across production lot |
| VWM | 13.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA, setting safe DC bias margin |
| IPP @ 10/1000 µs | 44.4 A - peak impulse current the device safely clamps without failure, directly supporting 1000 W surge rating |
| VC @ IPP | 22.5 V - clamped voltage seen by protected circuit during full-rated surge, limiting downstream stress |
| TJ max | +175°C - maximum junction temperature enabling use in under-hood automotive modules and industrial power supplies |
| Moisture Sensitivity | Level 1 (J-STD-020) - allows unlimited floor life and standard reflow without baking preconditioning |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Reversible transient conduction path | No polarity marking required; conducts equally in both directions above VBR, simplifying PCB layout and eliminating orientation errors |
| Case (exposed lead frame) | Thermal and mechanical interface | Provides low-thermal-resistance path (RθJL = 20°C/W) to PCB copper, critical for sustained power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring zero-failure reliability |
| ISO 7637-2 compliant | Guarantees robustness against real-world vehicle electrical disturbances: load dump, battery disconnect, and inductive switching noise |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| 1.0 ps response time | Enables protection of high-speed interfaces (e.g., CAN FD, LIN) where nanosecond-scale transients would otherwise bypass slower suppressors |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump spikes (up to 35 V, 400 ms) and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed across power rail input, conducting only during overvoltage events. Use Value: Limits rail voltage to ≤22.5 V during 1000 W surges, preventing damage to LDOs, MCUs, and CAN transceivers downstream. | Use Scenario: Safeguarding high-speed CAN FD nodes against ESD (±8 kV contact) and coupled transients on differential bus lines. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp between CAN_H and CAN_L, responding within 1 ps to preserve signal integrity. Use Value: Clamps common-mode surges while maintaining <1 pF junction capacitance at 0 V, avoiding data rate degradation. |
| Industrial Sensor Interface Protection | LED Driver Input Surge Mitigation |
Use Scenario: Shielding analog sensor front-ends (e.g., pressure, temperature) connected via long cables in factory automation. IC Role / Device Role / Timing Role: Standoff voltage (13.6 V) matches typical 10–12 V sensor supply rails; clamps induced lightning-induced surges. Use Value: Prevents latch-up or burnout in precision op-amps and ADCs by limiting transient energy to <100 mJ per event. | Use Scenario: Protecting constant-current LED drivers from AC line transients and inductive kickback in streetlight systems. IC Role / Device Role / Timing Role: Placed across driver input terminals to absorb 10/1000 µs surges from grid switching or nearby motor starts. Use Value: Sustains 1000 W peak power without derating at +85°C ambient, extending driver MTBF in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | Same DO-214AA package, identical VBR (15.2–16.8 V), but rated at 600 W (vs. 1000 W); lower IPP (29.1 A) and higher VC (24.4 V) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 (load dump) in 12 V systems | Select 1KSMB16CAH when full 1000 W surge handling and AEC-Q101 validation are mandatory |
| 1.5SMC16CA | Higher-power 1500 W rating in larger DO-214AB (SMC) package; same VBR range but 20% larger footprint and 0.3 g weight | Requires PCB redesign; not drop-in compatible due to different pad layout and thermal mass | Choose 1KSMB16CAH for space-constrained SMB layouts where 1000 W suffices and AEC-Q101 is required |
Compared with SMBJ16CA and 1.5SMC16CA, the 1KSMB16CAH uniquely balances 1000 W surge capacity, AEC-Q101 qualification, and DO-214AA footprint-enabling automotive-compliant protection without board rework or thermal compromise.
Availability
1KSMB16CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, LED lighting drivers, and high-reliability CAN bus systems requiring stable component supply and full lifecycle traceability.
Supply support for 1KSMB16CAH 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, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The 1KSMBxxCAH series was developed specifically to meet stringent AEC-Q101 and ISO 7637-2 requirements for bidirectional transient suppression in next-generation automotive electronics and ruggedized industrial controls.
FAQ
What does the 'CAH' suffix indicate in 1KSMB16CAH?
The 'CAH' suffix denotes a bi-directional configuration: the 1KSMB16CAH has symmetrical breakdown characteristics in both forward and reverse directions, unlike the unidirectional 'AH' variants. This enables single-device protection of AC-coupled or differential signal lines such as CAN, LIN, or RS-485 without polarity concerns. The device uses the same DO-214AA package and shares all thermal and surge ratings with its unidirectional counterpart.
Is 1KSMB16CAH suitable for protecting a 12 V automotive MCU power rail?
Yes, the 1KSMB16CAH is explicitly designed for this use case. Its 13.6 V stand-off voltage (VWM) provides adequate margin above nominal 12 V systems, while its 22.5 V clamping voltage ensures downstream components-including MCUs, PMICs, and CAN transceivers-remain below their absolute maximum ratings during ISO 7637-2 Pulse 1 (load dump) events. AEC-Q101 qualification further validates its reliability in under-hood environments.
How does the 1.0 ps response time of 1KSMB16CAH impact system-level ESD protection?
The 1.0 ps response time means the 1KSMB16CAH begins clamping before most ESD waveforms reach peak amplitude, significantly reducing energy delivered to protected ICs. For example, during IEC 61000-4-2 ±8 kV contact discharge, this ultrafast turn-on limits voltage overshoot on CAN_H/CAN_L lines to ≤22.5 V, preventing gate oxide damage in transceivers and preserving bit-error-rate performance in high-speed networks.
Can 1KSMB16CAH be used in place of a unidirectional TVS like 1KSMB16AH?
No-1KSMB16CAH and 1KSMB16AH are not interchangeable without circuit review. While both share identical VBR, VWM, and surge ratings, the 1KSMB16CAH is bi-directional and lacks a cathode band, making it unsuitable for DC-biased unidirectional rails where reverse blocking is required. Substitution requires verifying that the application demands symmetrical clamping and that no steady-state reverse voltage exceeds VWM.
What is the maximum ambient temperature at which 1KSMB16CAH maintains full 1000 W surge capability?
The 1KSMB16CAH maintains full 1000 W (10/1000 µs) surge rating only at TA = 25°C. Above this, derating applies per Figure 2 in the datasheet: at +85°C ambient, the peak pulse power drops to approximately 650 W. Designers must consult the pulse derating curve and ensure PCB thermal design (copper area, airflow) keeps junction temperature ≤175°C during surge events to avoid permanent degradation.
1KSMB16CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- 1KSMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 44.4A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB16CAH FAQ
1.How can I place an order for 1KSMB16CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB16CAH 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 1KSMB16CAH reliable?
The price and inventory of 1KSMB16CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB16CAH is usually 5 days.
3.What payment methods are accepted for 1KSMB16CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB16CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB16CAH?
1KSMB16CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB16CAH 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 1KSMB16CAH?
For technical support, including 1KSMB16CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB16CAH requirements.
6.How does Aetrix verify that 1KSMB16CAH is sourced from the original manufacturer or authorized distributors?
All 1KSMB16CAH 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 1KSMB16CAH meets industry standards.
7.What is the process for return or replacement of 1KSMB16CAH?
All 1KSMB16CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB16CAH, 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 1KSMB16CAH part is unused and in its original packaging.
Return procedure for 1KSMB16CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB16CAH 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…
