My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ60CH
- Part No.:
- SMAJ60CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ60CH.pdf
- Description:
- TVS DIODE 60VWM 107VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,100
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ60CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade overvoltage protection. It features a 60 V working stand-off voltage (VWM), 66.7–81.5 V breakdown voltage (VBR), 107 V maximum clamping voltage (VC) at 3.7 A peak impulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - deployed in on-board DC/DC converters and SMPS input stages.
For engineers reviewing the SMAJ60CH datasheet, SMAJ60CH pinout, SMAJ60CH application, or SMAJ60CH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, moisture sensitivity level 1, and DO-214AC mechanical compatibility with automated placement.
Technical Context
The SMAJ60CH is a unidirectional/bidirectional TVS diode configured as a single die in a glass-passivated junction, enabling sub-1.0 ps response time from 0 V to VBR(min). Its bidirectional operation (denoted by "CH" suffix) ensures symmetrical clamping in both polarities, with electrical characteristics valid across forward and reverse directions.
It meets ISO 7637-2 immunity requirements for automotive transients and supports steady-state power dissipation of 1 W at 25°C, derated linearly above that ambient temperature. Junction temperature range spans −55°C to +150°C, aligning with under-hood and engine-control module environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 60 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT=1 mA | 66.7–81.5 V - Voltage at which device enters avalanche breakdown; defines minimum surge threshold |
| VC @ IPPM=3.7 A | 107 V - Clamped voltage during 10/1000 µs transient; limits downstream IC stress |
| PPPM | 400 W - Peak pulse power handling per standard 10/1000 µs waveform (300 W above 78 V) |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss |
| Package | DO-214AC (SMA) - Surface-mount outline with cathode band marking; compatible with J-STD-002 soldering |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.060 g; UL 94V-0 rated compound; JESD201 Class 2 whisker resistant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias / reference terminal in bidirectional mode | Connected to protected line (e.g., CAN bus, power rail); symmetric conduction enables dual-polarity surge suppression |
| Cathode (banded end) | Current exit point in forward bias / complementary terminal in bidirectional mode | Typically tied to ground or low-impedance return path; clamping occurs between anode and cathode regardless of polarity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Electrical symmetry in both directions enables single-device protection of AC-coupled or floating lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive under-hood use including thermal cycling, high-temp reverse bias, and mechanical shock |
| Sub-1.0 ps response time | Ensures clamping activation before fast-edge transients (e.g., ESD, load dump spikes) damage downstream logic or analog circuitry |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) test profiles |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; supports standard SMT assembly without special handling |
Applications
| Automotive Infotainment Power Rail | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs to head unit MCUs against load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between power rail and chassis ground to limit transient voltage to ≤107 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic supplies while maintaining AEC-Q101 compliance. | Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input optocoupler terminals to shunt fast-rising common-mode noise. Use Value: Enables reliable operation under IEC 61000-4-4 EFT and ISO 7637-2 Pulse 3b without signal distortion or false triggering. |
| On-Board DC/DC Converter Input | LED Driver Module Surge Suppression |
Use Scenario: Input-side protection for buck converters powering ADAS sensors in ADAS domain controllers. IC Role / Device Role / Timing Role: Primary transient limiter upstream of input filter capacitor; clamps 10/1000 µs pulses to <107 V. Use Value: Maintains converter stability during cold-crank events (ISO 16750-2) and prevents MOSFET gate overstress. | Use Scenario: Overvoltage protection for constant-current LED drivers in automotive exterior lighting. IC Role / Device Role / Timing Role: Bidirectional TVS placed across driver output terminals to absorb reverse EMF from inductive ballast circuits. Use Value: Extends LED module lifetime by limiting reverse voltage spikes to ≤107 V during PWM switching transitions. |
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 SMAJ60CA | Identical VWM (60 V), VC = 107 V, same DO-214AC package; AEC-Q101 qualified but not ISO 7637-2 certified | Acceptable where ISO 7637-2 is not mandated; lacks documented Pulse 2a/2b validation | Select SMAJ60CH when full automotive transient immunity (Pulse 1/2a/2b/3a/3b) is required |
| Vishay SMAJ60AY | VWM = 60 V, VC = 103 V, same power rating; RoHS/halogen-free compliant but no AEC-Q101 documentation publicly available | Suitable for industrial DC/DC inputs; not validated for automotive temperature cycling or humidity testing | Prefer SMAJ60CH for automotive OEM designs requiring auditable AEC-Q101 evidence |
Compared with SMAJ60CA and SMAJ60AY, the SMAJ60CH uniquely combines AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and moisture sensitivity level 1 - making it the only option fully aligned with Tier-1 automotive power rail protection requirements.
Availability
SMAJ60CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and on-board DC/DC converters requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 validation.
Supply support for SMAJ60CH 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 distribution and automotive qualification capabilities.
The SMAJ series is engineered specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 immunity, and surface-mount manufacturability in DO-214AC packaging.
FAQ
What does the "CH" suffix indicate in SMAJ60CH?
The "CH" suffix denotes a bidirectional configuration: SMAJ60CH provides symmetrical clamping in both forward and reverse directions, unlike unidirectional "H" variants. This allows single-device protection of AC-coupled signals or floating power rails without polarity constraints - critical for CAN bus interfaces and differential sensor inputs where voltage polarity may invert during transients.
Is SMAJ60CH suitable for ISO 7637-2 Pulse 1 testing?
Yes, SMAJ60CH is explicitly rated to meet ISO 7637-2 Pulse 1 (inductive load dump) requirements. Its 400 W peak pulse power rating and 107 V clamping voltage at 3.7 A ensure voltage suppression below the 120 V threshold specified for 12 V systems, preventing damage to downstream regulators and microcontrollers during simulated alternator disconnection events.
What is the maximum junction temperature for SMAJ60CH?
The maximum junction temperature (TJ(MAX)) for SMAJ60CH is +150°C, consistent with its AEC-Q101 qualification and DO-214AC package thermal performance. This rating enables reliable operation in under-hood environments such as engine control units and body control modules, provided PCB copper area and airflow meet TSC's recommended thermal pad layout guidelines.
Does SMAJ60CH require baking before reflow soldering?
No, SMAJ60CH has moisture sensitivity level (MSL) 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without pre-baking. This eliminates process steps and cost in high-volume SMT lines - a key advantage over MSL 2a/3 devices requiring dry-pack or oven conditioning prior to assembly.
How does SMAJ60CH differ from SMAJ60AH?
SMAJ60AH is a unidirectional variant with identical VWM (60 V) and VBR range (66.7–73.7 V), but lower clamping voltage (96.8 V vs. 107 V) and reduced peak impulse current (4.1 A vs. 3.7 A). SMAJ60CH's bidirectional design sacrifices slight clamping performance for polarity-agnostic protection - essential where reverse voltage transients cannot be ruled out, such as in battery-connected systems.
SMAJ60CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 107V
- Current - Peak Pulse (10/1000µs):
- 3.7A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ60CH FAQ
1.How can I place an order for SMAJ60CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ60CH 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 SMAJ60CH reliable?
The price and inventory of SMAJ60CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ60CH is usually 5 days.
3.What payment methods are accepted for SMAJ60CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ60CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ60CH?
SMAJ60CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ60CH 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 SMAJ60CH?
For technical support, including SMAJ60CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ60CH requirements.
6.How does Aetrix verify that SMAJ60CH is sourced from the original manufacturer or authorized distributors?
All SMAJ60CH 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 SMAJ60CH meets industry standards.
7.What is the process for return or replacement of SMAJ60CH?
All SMAJ60CH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ60CH, 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 SMAJ60CH part is unused and in its original packaging.
Return procedure for SMAJ60CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ60CH 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…
