What is SIM100MOD and which systems is it designed for?

The SIM100MOD (Sendyne Isolation Monitor 100, Module version) is a high-voltage isolation monitoring module that continuously monitors the insulation resistance between battery and chassis in ungrounded (Isolated Terra / IT) DC power systems. Designed for EV/HEV/PHEV vehicles, DC fast-charging stations, energy storage systems, and battery management systems. Thanks to its patented signal injection algorithm, the module operates correctly even when the battery is active with large voltage variations, and remains functional when the battery is not connected. It detects both resistive leakages and capacitively stored energy.

How to choose an ordering code? (among 24 SKU variants)

The SIM100MOD-XXX ordering code is selected with 3 parameters: 1. CAN speed (1st character): A = 500 kbit/s — Standard high-speed CAN B = 250 kbit/s — Legacy/compatibility requirements 2. Voltage class (2nd character): L = 100V — Low-voltage systems (SPECIAL ORDER, SIM100MOD-xLx addendum document required) M = 960V — Standard mid-voltage EV (400V platform) N = 1500V — High-voltage EV (800V platform, mega DC charging) 3. Connectors + CAN termination (3rd character): A = All connectors + integrated 120Ω termination resistor B = All connectors, no termination (when present elsewhere on CAN bus) C = No connectors (soldered) + integrated termination D = No connectors, no termination Example selections: Standard 400V EV: SIM100MOD-AMA (500 kbit, 960V, full connectors) 800V EV platform: SIM100MOD-ANA (500 kbit, 1500V, full connectors) OEM PCB solder integration: SIM100MOD-ANC (500 kbit, 1500V, no connectors) Legacy code mapping: Old "SIM100MOD" order → fulfilled with SIM100MOD-AMA .

What is the isolation measurement accuracy and why does it matter?

SIM100MOD provides ±5% isolation measurement uncertainty (in the 100 kΩ – 500 kΩ resistance range, with battery voltage > 15V). This is comfortably within UL 2231-2's ±15% requirement — in practice, SIM100 measurement errors are below ±3%. Why is this important? Early fault detection: Insulation deterioration progresses slowly over time; with ±5% accuracy it can be detected at early stages. False positive reduction: Low accuracy generates unnecessary alarms — leading to operational disruptions. Standards compliance: UL 2231, ISO 6469-3, and IEC 61557-8 require specific accuracy levels. SIM100MOD measurement updates occur every 500 ms (0.5 seconds). A change in insulation resistance is detected in under 5 seconds.

What is capacitive leakage monitoring and why is it necessary?

Most insulation safety standards (including UL 2231) measure only resistive leakage. But there is another hazard in EV systems: capacitively stored energy . Y-capacitors (typically used in DC IT systems for EMI suppression) and other parasitic capacitors store energy. If this energy exceeds 0.2 J (200 mJ), it can be hazardous when discharged through an operator's body. Coolant leakage or personnel interventions may alter the originally designed capacitance. SIM100MOD measures isolation capacitance in the range 0.1 µF to 2 µF and reports the total energy stored from each battery terminal to chassis . This feature is unique in the industry today for insulation monitoring — thanks to Sendyne's patented technology.

When should SIM100MOD be preferred over the new SIM200?

Sensata launched the SIM200 as the next-generation IMD in March 2025. SIM100MOD remains in active production. Which should you choose? SIM100MOD is preferred when: Existing system has SIM100MOD integration and no change desired (drop-in replacement) ±1500V max measurement is sufficient (4 voltage classes not needed) Mature, field-proven technology preferred (since 2017) Operating temp -40°C / +125°C (electronics) required — SIM200 maxes at +85°C SIM200 is preferred when: New design project; latest platform desired Flexibility of 4 voltage classes needed (60V – 1500V) Configurable warning/fault thresholds + CAN ID Dedicated digital fault state output (1× digital + 1× PWM) needed UL2231 recognized + continuous "Always-On" monitoring Both products use Sendyne's patented algorithm; the core safety function is equivalent.

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Sendyne SIM100MOD Series

Classic benchmark IMD — Patented isolation monitoring algorithm, ±5% accuracy, 100/960/1500V voltage classes, 24 SKU variants

The Sendyne SIM100MOD is the first high-voltage isolation monitoring module designed for electric vehicles (EV) and hybrid vehicles (HEV). It continuously monitors the insulation resistance between a vehicle's IT (Isolated Terra) power system and chassis for deterioration of isolation and potentially dangerous levels of leakage current.

The patented algorithm (US Pat. 8,373,408 · 8,350,552 · 8,289,030) enables the module to detect not only resistive leakages but also capacitively stored energy — including multiple simultaneous symmetrical and asymmetrical faults. In the case of a fault, the unit identifies the relative position of the fault with respect to the battery terminals.

Battery-connected VX1 (Vp) and VX2 (Vn) voltage inputs can measure ±1500V (xNx variant) or ±960V (xMx variant) with reference to chassis (0V). Communication is via an isolated CAN 2.0B interface (500 or 250 kbit/s). Power supply range is +4.8 V to +53 V (variable, compatible with standard 5V to 48V supplies). The module operates within -40°C / +125°C electronics temperature, -40°C / +105°C with connectors.

SIM100MOD is designed as a component for systems complying with ISO 6469-3:2011-12, UL 2231-1, UL 2231-2, IEC 61557-8, CFR 571.305, and other applicable EV safety standards.

Typical applications:

Monitoring ungrounded (IT) DC power systems for hazardous resistive and capacitive leaks
Electric and hybrid vehicles (EV/HEV/PHEV)
DC fast-charging stations
Energy storage facilities (ESS)
Battery management systems (BMS)

Ordering matrix (24 SKU): CAN speed (A=500 kbit/s, B=250 kbit/s) × Voltage class (L=100V special order, M=960V, N=1500V) × Connectors (A=all connectors + termination, B=all connectors, no termination, C=no connectors + termination, D=no connectors, no termination).

Monitoring ungrounded (IT) DC power systems for hazardous resistive and capacitive leaksElectric vehicle (EV) and hybrid vehicle (HEV/PHEV) isolation monitoringDC fast-charging stations (50-350 kW)Energy storage facilities (ESS) and microgridBattery management system (BMS) isolation safety layerCommercial electric vehicle (e-bus, e-truck) safety monitoring

01type: Yüksek voltaj izolasyon izleme modülü (IT DC sistemleri)
02standards: ISO 6469-3, UL 2231-1/2, IEC 61557-8, CFR 571.305
03Power Supply: +4.8 V – +53 V (typ < 500 mW)
04communication: CAN 2.0B izole, 500 veya 250 kbit/s
05operating temp: -40°C / +125°C (elektronik), -40°C / +105°C (konnektörlerle)
06capacitance range: 0.1 – 2 µF
07voltage measurement: ±1500V (xNx) veya ±960V (xMx) max, 2 kanal
08isolation uncertainty: ±5% (100 kΩ – 500 kΩ aralığı)
09isolation resistance range: 0 – 2.727 MΩ

SIM100MOD Series Series Contactor Models

Sorted by current rating (150A → 1000A)

24 MODELS

MODEL↑ current	note	can kbits	connector	voltage class	permitted battery v	voltage measurement v
SIM100MOD-ALA	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	500	A (Tüm+termination)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-ALB	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	500	B (Tüm+termSiz)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-ALC	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	500	C (KonnSiz+term)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-ALD	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	500	D (KonnSiz+termSiz)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-AMA	Legacy SIM100MOD = SIM100MOD-AMA	500	A (Tüm+termination)	M (960V)	960	±962
SIM100MOD-AMB	—	500	B (Tüm+termSiz)	M (960V)	960	±962
SIM100MOD-AMC	—	500	C (KonnSiz+term)	M (960V)	960	±962
SIM100MOD-AMD	—	500	D (KonnSiz+termSiz)	M (960V)	960	±962
SIM100MOD-ANA	—	500	A (Tüm+termination)	N (1500V)	1500	±1552
SIM100MOD-ANB	—	500	B (Tüm+termSiz)	N (1500V)	1500	±1552
SIM100MOD-ANC	—	500	C (KonnSiz+term)	N (1500V)	1500	±1552
SIM100MOD-AND	—	500	D (KonnSiz+termSiz)	N (1500V)	1500	±1552
SIM100MOD-BLA	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	250	A (Tüm+termination)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-BLB	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	250	B (Tüm+termSiz)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-BLC	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	250	C (KonnSiz+term)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-BLD	Özel sipariş — SIM100MOD-xLx addendum dokümanı gerekli	250	D (KonnSiz+termSiz)	L (100V — ÖZEL SİPARİŞ)	100	±100
SIM100MOD-BMA	—	250	A (Tüm+termination)	M (960V)	960	±962
SIM100MOD-BMB	—	250	B (Tüm+termSiz)	M (960V)	960	±962
SIM100MOD-BMC	—	250	C (KonnSiz+term)	M (960V)	960	±962
SIM100MOD-BMD	—	250	D (KonnSiz+termSiz)	M (960V)	960	±962
SIM100MOD-BNA	—	250	A (Tüm+termination)	N (1500V)	1500	±1552
SIM100MOD-BNB	—	250	B (Tüm+termSiz)	N (1500V)	1500	±1552
SIM100MOD-BNC	—	250	C (KonnSiz+term)	N (1500V)	1500	±1552
SIM100MOD-BND	—	250	D (KonnSiz+termSiz)	N (1500V)	1500	±1552

TECHNICAL DIFFERENTIATORS

Why SIM100MOD-SERISI Series?

04 · CATEGORIES

Standards Compliance + Automotive Grade

Compliance with 4 main safety standards
OEM certification process shortened.
Automotive-grade design
Validated for EV/HEV main-line integration.

Resistive + Capacitive Dual Detection

±5% resistance accuracy (actually ±3%)
Early fault detection, fewer false positives.
Capacitive energy monitoring (0.1–2 µF)
Hazard from discharge through operator body anticipated.

Wide Voltage and Temperature Range

3 voltage classes + 24 SKU variants
Single supplier for all EV platforms.
-40°C / +125°C electronics
Stable operation in harsh automotive environments.

Patented Signal Injection Algorithm

Algorithm based on 3 US patents
Industry-unique accuracy level.
Accurate measurement under active battery
Reliable data even during driving and charging.

DATASHEET · GUIDE · APPLICATION NOTE

SIM100MOD-SERISI Series — Technical Resources

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FREQUENTLY ASKED QUESTIONS

About the SIM100MOD-SERISI series

05/05

RELATED INSIGHTS · SIM100MOD-SERISIREF · IMB · PUB · 03 ENTRIES

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// end of index · 03 / 03

Sendyne SIM100MOD Series

Why SIM100MOD-SERISI Series?

Standards Compliance + Automotive Grade

Resistive + Capacitive Dual Detection

Wide Voltage and Temperature Range

Patented Signal Injection Algorithm

SIM100MOD-SERISI Series — Technical Resources

Datasheets

Brochures

Manuals

About the SIM100MOD-SERISI series

Go deeper

EV Sistemlerinde İzolasyon İzleme: IT Topolojisinin Güvenliği

Kapasitif Enerji Tehlikeleri ve Y-Kapasitörler

UL 2231 ve ISO 6469-3 Standart Karşılaştırması: EV IMD Seçimi

Sendyne SIM100MOD Series

Why SIM100MOD-SERISI Series?

Standards Compliance + Automotive Grade

Resistive + Capacitive Dual Detection

Wide Voltage and Temperature Range

Patented Signal Injection Algorithm

SIM100MOD-SERISI Series — Technical Resources

Datasheets

Brochures

Manuals

About the SIM100MOD-SERISI series

01What is SIM100MOD and which systems is it designed for?

02How to choose an ordering code? (among 24 SKU variants)

03What is the isolation measurement accuracy and why does it matter?

04What is capacitive leakage monitoring and why is it necessary?

05When should SIM100MOD be preferred over the new SIM200?

Go deeper

EV Sistemlerinde İzolasyon İzleme: IT Topolojisinin Güvenliği

Kapasitif Enerji Tehlikeleri ve Y-Kapasitörler

UL 2231 ve ISO 6469-3 Standart Karşılaştırması: EV IMD Seçimi