My Inquiry
My Account
Taiwan Semiconductor Corporation 1.5SMC91AH
- Part No.:
- 1.5SMC91AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC91AH.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,782
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC91AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-level surge protection in DC power rails and signal lines. It features a 91V breakdown voltage (86.5–95.5V), 1500W peak pulse power rating, 12.6A maximum peak impulse current, and clamps transients to ≤125V at rated surge. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
For engineers reviewing the 1.5SMC91AH datasheet, 1.5SMC91AH pinout, 1.5SMC91AH application, or 1.5SMC91AH equivalent, this device is selected for robust ESD and load-dump immunity in automotive infotainment, industrial PLC I/O modules, and telecom power interfaces where fast clamping (<1.0 ps response), low leakage (<1 µA @ 77.8V), and DO-214AB package compatibility are critical.
Technical Context
The 1.5SMC91AH operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping high-energy transients while maintaining stable VBR (±5% tolerance) and low temperature coefficient (0.106%/°C). Its 150°C max junction temperature and 50°C/W junction-to-ambient thermal resistance support operation in thermally constrained SMT layouts.
It delivers 125V clamping voltage at 12.6A 10/1000µs surge current, with working stand-off voltage of 77.8V and <1 µA blocking leakage above that level. The device complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling standard reflow assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5V / 95.5V - Ensures reliable avalanche conduction onset within tight tolerance for predictable clamping threshold |
| VWM | 77.8V - Maximum continuous reverse operating voltage; defines safe DC bias margin before leakage rises |
| VC @ IPPM | ≤125V @ 12.6A - Clamping voltage under standardized 10/1000µs surge; determines protected circuit's peak stress level |
| PPK | 1500W - Peak pulse power handling per single transient; supports ISO 7637-2 Pulse 5a (load dump) immunity |
| IR @ VWM | <1 µA - Ultra-low reverse leakage preserves battery life and signal integrity in always-on systems |
| TJ max | +150°C - Enables use in under-hood automotive environments and high-power industrial enclosures |
| Package | DO-214AB (SMC) - Industry-standard 2-pin SMT outline with 7.11 × 6.22 mm footprint and matte tin leads |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; terminals are matte tin plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input / Surge return path | Connected to protected line (e.g., +12V rail); conducts during reverse-biased transient events |
| Cathode | Clamping reference / Ground reference | Connected to system ground or low-impedance return; establishes clamping voltage relative to GND |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives; critical for harsh-environment deployment |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line transients) without degradation |
| Fast response time | <1.0 ps - Limits voltage overshoot during nanosecond-scale ESD events (IEC 61000-4-2 Level 4) |
| Moisture Sensitivity Level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without process modification |
Applications
| Automotive Infotainment Power Rail | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting USB-C and HDMI power pins in head units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on +12V supply line upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤125V, preventing damage to downstream PMICs and interface ICs rated for 16V absolute max. |
Use Scenario: Safeguarding 24V digital input channels from field-wiring induced transients in factory automation controllers. IC Role / Device Role / Timing Role: Front-end TVS on optocoupler input side, absorbing inductive kickback from solenoid/valve switching. Use Value: Clamps 12.6A surge within 10/1000µs to protect opto-LEDs and microcontroller GPIOs without derating. |
| Telecom Base Station DC Feeds | Medical Diagnostic Equipment Power Entry |
Use Scenario: Secondary surge suppression on -48V DC distribution boards feeding RF amplifiers and backhaul modems. IC Role / Device Role / Timing Role: Standoff-rated protector between bulk filter capacitors and point-of-load regulators. Use Value: Maintains 77.8V working voltage margin while delivering 1500W pulse handling to meet GR-1089-CORE requirements. |
Use Scenario: Input-stage protection for AC/DC adapters powering imaging subsystems (e.g., ultrasound front-ends). IC Role / Device Role / Timing Role: First-line defense against ESD and mains-coupled transients entering via IEC 60601-1 compliant power entry modules. Use Value: Sub-1µA leakage avoids drift in precision analog sensor bias networks; AEC-Q101 qualification supports safety-critical design reuse. |
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 | Lower PPK (600W), higher VC (129V), SMB package (smaller footprint, lower thermal mass) | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients in consumer-grade designs | Select when board space is constrained and surge energy is ≤600W; verify thermal derating at elevated ambient temperatures |
| 1.5KE91A | Through-hole TO-204AA (DO-41) package, same VBR/VC specs but slower response (~1.5 ps), no AEC-Q101 qualification | Requires wave soldering; unsuitable for automotive or high-reliability automated SMT lines | Use only in legacy through-hole designs or cost-sensitive non-automotive industrial applications where AEC-Q101 is not mandated |
Compared with SMBJ90A and 1.5KE91A, the 1.5SMC91AH uniquely combines AEC-Q101 qualification, 1500W surge capacity, and DO-214AB SMT compatibility-making it the preferred choice for new automotive and industrial designs requiring certified, high-power, surface-mount TVS protection.
Availability
1.5SMC91AH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and telecom DC power distribution requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC91AH 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 manufacturing and quality certifications including AEC-Q101 and ISO/TS 16949.
The 1.5SMCxxAH series was developed to deliver automotive-grade, high-power SMT TVS protection with tight VBR tolerance and industry-leading clamping performance for 12V/24V/48V system rails.
FAQ
What is the breakdown voltage range for the 1.5SMC91AH?
The 1.5SMC91AH has a specified breakdown voltage range of 86.5V to 95.5V at 1.0mA test current, measured per ANSI/IEEE C62.35. This ±5% tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in 12V and 24V automotive and industrial systems.
Is the 1.5SMC91AH suitable for bidirectional transient protection?
No-the 1.5SMC91AH is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications, TSC offers the 1.5SMC91CAH variant, which provides symmetrical clamping in both directions and uses a different marking code (FVJ → FVJ-BIDIR) and electrical test methodology.
Does the 1.5SMC91AH require special handling during PCB assembly?
No-1.5SMC91AH is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and processed using standard lead-free reflow profiles (peak 260°C) without baking or dry-pack requirements, simplifying SMT line integration.
How does the 1.5SMC91AH compare to the 1.5SMC91H variant?
The 1.5SMC91AH offers tighter breakdown voltage tolerance (86.5–95.5V vs. 81.9–100V for 1.5SMC91H) and lower clamping voltage (125V vs. 131V at rated IPPM). This makes the 1.5SMC91AH preferable for designs demanding higher precision and lower let-through voltage under surge conditions.
What standards does the 1.5SMC91AH comply with for automotive applications?
The 1.5SMC91AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms-covering key automotive transient threats including inductive load switching, battery disconnection, and capacitive coupling noise. It is not rated for Pulse 5a (load dump), which requires higher clamping energy capability.
1.5SMC91AH 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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)
1.5SMC91AH FAQ
1.How can I place an order for 1.5SMC91AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC91AH 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 1.5SMC91AH reliable?
The price and inventory of 1.5SMC91AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC91AH is usually 5 days.
3.What payment methods are accepted for 1.5SMC91AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC91AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC91AH?
1.5SMC91AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC91AH 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 1.5SMC91AH?
For technical support, including 1.5SMC91AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC91AH requirements.
6.How does Aetrix verify that 1.5SMC91AH is sourced from the original manufacturer or authorized distributors?
All 1.5SMC91AH 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 1.5SMC91AH meets industry standards.
7.What is the process for return or replacement of 1.5SMC91AH?
All 1.5SMC91AH units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC91AH, 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 1.5SMC91AH part is unused and in its original packaging.
Return procedure for 1.5SMC91AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC91AH 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…
