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Taiwan Semiconductor Corporation 1.5SMC24H
- Part No.:
- 1.5SMC24H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC24H.pdf
- Description:
- 1500W, 24V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,085
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Product details
Overview
1.5SMC24H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 24V nominal breakdown voltage (21.6–26.4V), 1500W peak pulse power rating, 34.7V maximum clamping voltage at 45A surge current, and DO-214AB (SMC) package. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and switching transients.
For engineers reviewing the 1.5SMC24H datasheet, 1.5SMC24H pinout, 1.5SMC24H application, or 1.5SMC24H equivalent, this device is selected for robust ESD and surge immunity in automotive body control modules, industrial I/O interfaces, and telecom power supply inputs where fast response (<1.0 ps), low leakage (<1 µA @ 19.4V), and stable thermal performance (RθJC = 15°C/W) are critical.
Technical Context
The 1.5SMC24H operates as a unidirectional avalanche diode with glass-passivated junction, enabling precise voltage clamping during transient events. Its electrical behavior follows IEEE C62.35 standards, with breakdown tested at 1.0 mA and clamping verified at 45A using the 10/1000µs waveform per Fig.5.
Thermally, it supports continuous operation from –55°C to +150°C junction temperature, with derated peak power above 25°C ambient per Fig.2. Its DO-214AB package provides mechanical robustness, UL 94V-0 flammability compliance, and matte tin-plated leads compatible with J-STD-002 soldering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR Min/Max | 21.6 V / 26.4 V - Ensures reliable turn-on within ±10% of nominal 24V, minimizing false triggering while guaranteeing protection onset before downstream IC damage. |
| VWM | 19.4 V - Maximum continuous reverse working voltage; sets safe DC operating margin below breakdown for stable rail protection without leakage-induced power loss. |
| VC @ IPPM | 34.7 V @ 45 A - Clamping voltage under full 1500W surge; defines worst-case voltage seen by protected circuit during ISO 7637-2 Pulse 5a (load dump). |
| IR @ VWM | <1 µA - Ultra-low reverse leakage ensures negligible standby current draw in battery-powered or high-impedance sensing nodes. |
| PPK | 1500 W - Peak pulse power handling per 10/1000µs waveform; supports repeated transient suppression in automotive and industrial environments. |
| TJ Max | +150 °C - Maximum junction temperature rating enables use in under-hood automotive locations and enclosed industrial enclosures without thermal shutdown. |
| RθJC | 15 °C/W - Low junction-to-case thermal resistance allows efficient heat transfer to PCB copper, supporting sustained surge duty cycles with minimal temperature rise. |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0; terminals are matte tin-plated and whisker-resistant per JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected line (e.g., 24V supply rail); conducts during forward surge only in unidirectional mode. |
| Cathode | Clamp/Return side terminal | Connected to ground or lower-potential reference; sinks surge current into ground path during reverse-biased transient events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock-enabling use in BCM, lighting, and ADAS power domains. |
| Glass passivated junction | Provides stable, repeatable breakdown characteristics over lifetime and across temperature, eliminating parameter drift due to moisture or contamination ingress. |
| ISO 7637-2 compliance | Guarantees functional immunity against standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b), reducing need for additional filtering or validation effort. |
| Fast response time <1.0 ps | Clamps sub-nanosecond ESD events before sensitive logic or analog circuitry sustains latch-up or gate oxide damage. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, supporting standard SMT assembly without process modification or yield risk. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects 24V CAN/LIN bus power rails and microcontroller I/O from load dump, jump-start, and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 24V supply input; absorbs energy from ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). Use Value: Limits rail voltage to ≤34.7V during 1500W surges, preventing brownout or destruction of 3.3V/5V LDOs and MCU power domains. |
Use Scenario: Shields 24V digital input channels from field-wiring induced transients (e.g., motor contactor switching, ESD from operator touch). IC Role / Device Role / Timing Role: Front-end TVS on each optocoupler input channel; placed before series current-limiting resistor to minimize voltage overshoot. Use Value: Clamps 45A surge to 34.7V within <1ps, ensuring optocoupler LED and input comparator remain within absolute maximum ratings. |
| Telecom Power Supply Output | Smart Meter Battery Backup Circuit |
Use Scenario: Safeguards 24V DC output of AC/DC adapter against lightning-induced surges entering via long interconnect cables. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated output rail; coordinated with upstream MOV and common-mode choke per IEC 61000-4-5 Level 3. Use Value: Delivers 1500W clamping capacity with 34.7V VC, maintaining output regulation integrity during 10/1000µs surges up to 4kV line-earth. |
Use Scenario: Protects lithium-thionyl chloride (LiSOCl₂) backup battery charging path from ESD and accidental polarity reversal during field servicing. IC Role / Device Role / Timing Role: Unidirectional clamp between battery positive and system ground; blocks reverse current while clamping positive transients. Use Value: With VWM = 19.4V and VBR ≥21.6V, it remains fully blocking during normal 3.6V–3.8V battery operation yet activates instantly at >24V fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | 600W peak power (vs. 1500W); DO-214AA (SMB) package; slightly higher VC = 38.9V @ 15.4A | Lower surge capacity limits use to non-automotive, low-energy I/O lines; not ISO 7637-2 certified | Select when space-constrained layouts require smaller SMB footprint and surge demands are ≤600W. |
| 1.5KE24A | Through-hole TO-204AA (DO-41); same 24V VBR range but slower response (~1ns); no AEC-Q101 or ISO 7637-2 documentation | Requires wave soldering; unsuitable for automated SMT lines or automotive qualification-critical designs | Choose only for legacy through-hole systems where rework flexibility outweighs surge performance and qualification needs. |
Compared with SMBJ24A and 1.5KE24A, the 1.5SMC24H delivers triple the peak power rating, automotive-grade qualification, and surface-mount compatibility-making it the preferred choice for new 24V automotive and industrial designs requiring validated, high-energy transient immunity.
Availability
1.5SMC24H is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom power supply designs requiring stable component supply, AEC-Q101 compliance, and 1500W surge resilience.
Supply support for 1.5SMC24H 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, with global distribution and AEC-Q101-qualified product lines.
The 1.5SMCxxH series was engineered specifically for high-reliability 24V/48V automotive and industrial power rail protection, emphasizing low clamping voltage, fast response, and robust thermal performance in compact SMC packages.
FAQ
What is the maximum clamping voltage of the 1.5SMC24H under rated surge current?
The 1.5SMC24H has a maximum clamping voltage (VC) of 34.7 V at 45 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits will not experience voltages exceeding 34.7 V during standardized surge events, preserving downstream IC integrity in 24V systems.
Is the 1.5SMC24H suitable for bidirectional transient suppression?
No-the 1.5SMC24H is a unidirectional TVS diode intended for DC rail protection with defined anode/cathode polarity. For bidirectional applications (e.g., AC lines or data buses), Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., 1.5SMC24CH). Using the 1.5SMC24H in reverse-biased AC configurations risks catastrophic failure due to lack of symmetrical breakdown capability.
Does the 1.5SMC24H require derating at elevated ambient temperatures?
Yes-the 1.5SMC24H must be derated above 25°C ambient per Figure 2 in the datasheet. Its peak pulse power drops linearly to zero at +150°C ambient, with RθJA = 50°C/W defining thermal limits. At 85°C ambient, usable peak power is reduced to approximately 900W, requiring layout review for copper area and airflow if operating near thermal limits.
What is the marking code for the 1.5SMC24H on the device body?
The 1.5SMC24H is marked with the code "ELJ" on its DO-214AB (SMC) package body, followed by date code and factory identifiers. This marking aligns with Taiwan Semiconductor's standardized coding scheme and enables visual verification and traceability during incoming inspection or field repair.
How does the 1.5SMC24H compare to the 1.5SMC24AH variant?
The 1.5SMC24AH offers tighter breakdown voltage tolerance (22.8–25.2 V vs. 21.6–26.4 V for 1.5SMC24H) and slightly lower clamping voltage (33.2 V vs. 34.7 V), making it preferable for precision 24V systems where margin to downstream IC absolute maximum ratings is constrained. Both share identical package, power rating, and qualification status.
1.5SMC24H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 45A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC24H FAQ
1.How can I place an order for 1.5SMC24H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC24H 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 1.5SMC24H reliable?
The price and inventory of 1.5SMC24H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC24H is usually 5 days.
3.What payment methods are accepted for 1.5SMC24H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC24H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC24H?
1.5SMC24H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC24H 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 1.5SMC24H?
For technical support, including 1.5SMC24H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC24H requirements.
6.How does Aetrix verify that 1.5SMC24H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC24H 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 1.5SMC24H meets industry standards.
7.What is the process for return or replacement of 1.5SMC24H?
All 1.5SMC24H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC24H, 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 1.5SMC24H part is unused and in its original packaging.
Return procedure for 1.5SMC24H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC24H Tags
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