My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC91H
- Part No.:
- 1.5SMC91H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91H.pdf
- Description:
- 1500W, 91V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,398
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC91H from Taiwan Semiconductor is a unidirectional 1500W surface-mount transient voltage suppressor (TVS) diode with a breakdown voltage range of 81.9V to 100V, working stand-off voltage of 73.7V, and clamping voltage of 131V at 12A peak pulse current - designed for automotive and industrial power rail protection against ESD, lightning surges, and load dump transients.
For engineers reviewing the 1.5SMC91H datasheet, 1.5SMC91H pinout, 1.5SMC91H application, or 1.5SMC91H equivalent, this device delivers AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA leakage above 10V, and DO-214AB (SMC) package compatibility for high-reliability board-level surge immunity.
Technical Context
The 1.5SMC91H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient response (<1.0ps) and stable clamping under repetitive surge stress. Its thermal design supports 150°C maximum junction temperature with RθJC = 15°C/W and RθJA = 50°C/W, enabling robust operation in constrained PCB layouts.
It meets ISO 7637-2 requirements for automotive electrical systems, including Pulse 1 (inductive load disconnect), Pulse 2a (sudden load interruption), Pulse 2b (supply line inductive spike), and Pulses 3a/3b (capacitive coupling and ground bounce). Forward voltage is specified at 3.5V @ 50A, consistent with the 1.5SMC6.8H–1.5SMC91H family segment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 81.9V to 100V - defines minimum and maximum voltage at which avalanche conduction begins reliably under 1mA test current |
| VWM | 73.7V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VC@IPPM | 131V @ 12A - clamping voltage during 10/1000μs surge, limiting downstream circuit stress |
| PPK | 1500W - peak pulse power handling per single 10/1000μs waveform, derated above 25°C ambient |
| IR@VWM | <1μA - ensures negligible standby current draw on protected lines, critical for low-power systems |
| TJ max | 150°C - enables operation in under-hood automotive environments and industrial enclosures |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 0.210g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, JESD201 Class 2 whisker resistance, and moisture sensitivity level 1 (MSL-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side for unidirectional surge path | Connected to protected line (e.g., 24V rail); conducts only during reverse-biased overvoltage events |
| Cathode | Ground/reference side | Connected to system ground or low-impedance return; establishes clamping reference and defines polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability across temperature cycling, humidity, and mechanical shock per JEDEC standards |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal and electrical stress |
| ISO 7637-2 compliance | Guarantees functional immunity to standardized automotive transients without external filtering or layout changes |
| Fast response time <1.0ps | Clamps before sensitive ICs experience damaging voltage overshoot, preserving signal integrity |
| Moisture sensitivity level 1 | Enables direct placement without baking or special handling, reducing manufacturing cost and risk |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24V supply rails in engine control units (ECUs), body control modules (BCMs), and infotainment head units from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and primary DC/DC converter input stage. Use Value: Clamps 131V at 12A to prevent damage to upstream regulators and microcontrollers during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding digital input/output channels of programmable logic controllers from field-induced surges and ESD in factory automation environments. IC Role / Device Role / Timing Role: Primary surge suppression element on 24V sensor/actuator interface lines, mounted adjacent to connector entry points. Use Value: Limits transient energy to safe levels (<1μA leakage at 73.7V) while maintaining signal fidelity during normal operation. |
| Telecom Power Interface | Medical Equipment Power Entry |
Use Scenario: Safeguarding AC/DC adapter outputs and PoE-powered device inputs against induced lightning surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-stage TVS on 48V DC distribution bus, downstream of primary MOV-based protection. Use Value: Provides precise 73.7V stand-off and 131V clamping to protect isolated DC/DC converters and Ethernet PHYs without false triggering. | Use Scenario: Reinforcing power entry protection in non-life-sustaining medical devices (e.g., diagnostic monitors, infusion pumps) per IEC 60601-1 creepage/clearance requirements. IC Role / Device Role / Timing Role: Final-clamp TVS on internal 24V or 48V auxiliary power rails feeding display controllers and communication modules. Use Value: Ensures <1μA leakage and 150°C rating support long-term reliability in thermally sealed enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600W rating, lower VC = 123V @ 9.5A, SMB package (smaller footprint) | Lower power handling limits use to sub-1kW surge environments; not AEC-Q101 qualified | Select when space-constrained and surge threat level is moderate (e.g., consumer-grade equipment) |
| 1.5KE91A | Through-hole TO-204AA (DO-41), same VBR/VC, 1500W rating, no AEC-Q101 or ISO 7637-2 validation | Requires wave soldering or hand assembly; unsuitable for automated SMT lines or automotive vibration environments | Select only for legacy through-hole designs where rework to SMT is impractical |
Compared with SMBJ90A and 1.5KE91A, the 1.5SMC91H uniquely combines AEC-Q101 qualification, ISO 7637-2 compliance, and 1500W SMT capability in DO-214AB - making it the only choice for new automotive and high-reliability industrial designs requiring zero-layout compromise on surge immunity.
Availability
1.5SMC91H is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power interfaces, and medical diagnostic equipment requiring stable component supply and full traceability.
Supply support for 1.5SMC91H 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 certification capabilities.
The 1.5SMCxxH series was developed specifically for high-energy, surface-mount surge protection in automotive and industrial applications - emphasizing ISO 7637-2 compliance, thermal robustness, and automated assembly readiness.
FAQ
What is the clamping voltage of the 1.5SMC91H under standard surge conditions?
The 1.5SMC91H has a maximum clamping voltage (VC) of 131V at 12A peak pulse current (IPPM) using the 10/1000μs waveform defined in IEC 61000-4-5. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components in automotive and industrial circuits.
Is the 1.5SMC91H suitable for bidirectional transient suppression?
No - the 1.5SMC91H is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications, TSC offers the 1.5SMC91AH variant (marked FVJ), which provides symmetrical clamping in both polarities and uses CH or CAH suffixes per ordering code conventions.
Does the 1.5SMC91H meet automotive qualification standards?
Yes - the 1.5SMC91H is AEC-Q101 qualified and explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity. Its DO-214AB package, MSL-1 rating, and 150°C junction temperature support under-hood deployment in modern vehicle platforms.
What is the forward voltage specification for the 1.5SMC91H?
The forward voltage (VF) of the 1.5SMC91H is 3.5V at 50A forward surge current, consistent with the 1.5SMC6.8H–1.5SMC91H family segment. This parameter applies only during unidirectional fault conduction and is critical for calculating I2t energy during load-dump events.
How does the 1.5SMC91H compare to the 1.5SMC91AH variant?
The 1.5SMC91H is unidirectional with marking code FUJ, while the 1.5SMC91AH is also unidirectional but features tighter VBR tolerance (86.5–95.5V vs. 81.9–100V) and lower clamping voltage (125V vs. 131V). Both share identical package, power rating, and AEC-Q101 qualification - selection depends on required VBR precision and system margin.
1.5SMC91H 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):
- 73.7V
- Voltage - Breakdown (Min):
- 81.9V
- Voltage - Clamping (Max) @ Ipp:
- 131V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
1.5SMC91H FAQ
1.How can I place an order for 1.5SMC91H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91H 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 1.5SMC91H reliable?
The price and inventory of 1.5SMC91H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91H is usually 5 days.
3.What payment methods are accepted for 1.5SMC91H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91H?
1.5SMC91H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91H 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 1.5SMC91H?
For technical support, including 1.5SMC91H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91H requirements.
6.How does Aetrix verify that 1.5SMC91H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91H 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 1.5SMC91H meets industry standards.
7.What is the process for return or replacement of 1.5SMC91H?
All 1.5SMC91H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91H, 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 1.5SMC91H part is unused and in its original packaging.
Return procedure for 1.5SMC91H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91H 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…
